In a fist aspect the invention relates to a method for controlling a pump (2), the pump (2) comprising an integrated control unit (12), a drive unit having an electric motor (9) and a drive shaft (10), and a hydraulic unit having an impeller (11) connected to said electric motor (9) via said drive shaft (10), wherein the control unit (12) is operatively connected to the electric motor (9) and is configured for monitoring and controlling the operation of the pump (2), wherein the pump (2) further comprises an integrated pressure sensor (15) that has fixed reference pressure and that is operatively connected to the control unit (12), said control unit (12) being configured to determine the liquid level of the liquid surrounding the pump (2) based on a relation between the actual value of the pressure sensor (15) and a reference value, wherein said method comprises a sub-method for calibrating the pump (2) and comprising the steps of initiate pumping, continue pumping until the liquid level of the liquid surrounding the pump (2) is equal to a predetermined calibration level, the predetermined calibration level being fixed in relation to the pump (2), determining a calibration level actual value of the pressure sensor (15) when the liquid level of the liquid surrounding the pump (2) is equal to said predetermined calibration level, and calibrating the pump (2) by setting a new reference value corresponding to said calibration level actual value. In a second aspect the invention also relates to such a pump (2). Publication picture:
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
F04D 13/08 - Units comprising pumps and their driving means the pump being electrically driven for submerged use
F04D 15/00 - Control, e.g. regulation, of pumps, pumping installations, or systems
G01F 23/14 - Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
F04D 15/02 - Stopping of pumps, or operating valves, on occurrence of unwanted conditions
There is provided a method for treating wastewater, comprising a first treatment process comprising the steps of: providing wastewater from a wastewater supply to a first vessel comprising a first wastewater treatment activated sludge, the first vessel forming a part of a primary treatment; treating the wastewater so as to provide treated wastewater; and discharging at least a portion of the treated wastewater from the first vessel and the primary treatment assembly; and a second treatment process comprising the steps of providing wastewater from the wastewater supply to a second vessel comprising a second wastewater treatment activated sludge, the second vessel forming a part of the primary treatment assembly;treating the wastewater to provide treated wastewater; and discharging at least a portion of the treated wastewater from the second vessel and the primary treatment assembly; wherein the first treatment process further comprises the steps of: mixing the contents of the first vessel so as to suspend at least a portion of the first activated sludge in treated wastewater; and, subsequently, discharging at least a portion of the treated wastewater and suspended activated sludge from the first vessel and the primary treatment assembly by transferring a portion of the fluid contained in the second vessel into the first vessel so as to displace the treated wastewater and suspended activated sludge from the first vessel.
A pump is disclosed. The pump comprises at least one impeller; at least one diffuser; and at least one wear ring positioned between the at least one impeller and the at least one diffuser and removably coupled to the diffuser, the at least one wear ring having a plurality of radially extending clutch members wherein the clutch members are configured to hold a portion of the at least one diffuser.
A pump for pumping fluid comprises a pump housing which comprises a fluid inlet, a fluid outlet, a pumping chamber fluidly connected to the fluid inlet and the fluid outlet. Within the pumping chamber is provided a rotatable impeller for drawing fluid from the inlet and displacing the fluid out of the fluid outlet. The pump also comprises a drive source adapted to generate a drive force for rotating the impeller; a drivetrain assembly coupling the drive source to the impeller so as to transmit the drive force to the impeller, wherein the drivetrain assembly comprises a rotatable element arranged between the drive source and the impeller so as to transmit the drive force. The pump also includes an an ancillary device comprising a rotatable input element and the rotatable element of the drivetrain assembly is arranged such that it can be coupled to the rotatable input element of the ancillary device by an endless flexible mechanical element and thereby drive the rotatable input element when coupled by an endless flexible mechanical element. Additionally, the drive source, the drivetrain assembly and the impeller define a plurality of transmission elements and a pair of the transmission elements are spaced apart. The drivetrain assembly also comprises a moveable connecting element for coupling the spaced apart transmission elements, the moveable connecting element being moveable between: a first position in which the spaced apart transmission elements are coupled so as to enable the drive force to be transmitted from the drive source to the impeller; and a second position in which a gap is formed for allowing an endless flexible mechanical element to be threaded between the spaced apart transmission elements to allow the endless flexible mechanical element to couple the rotatable element and the rotatable input element of the ancillary device.
In a fist aspect the invention relates to a method for controlling a pump (2) in connection with first activation of the individual pump (2) following a connection of the individual pump (2) to a power supply, said pump (2) being configured to be connected to a Pump Network (1) comprising a plurality of pumps. The method is characterized by the steps of when connecting the individual pump (2) to the power supply, causing the individual pump (2) to remain deactivated, determining a value of at least one Operational parameter (OP) of the individual pump (2), determining a Reference input value (RIV) based on the determined value of said at least one Operational parameter (OP), utilizing the determined Reference input value (RIV) in a Random pause time function (RF) and obtaining a random Activation pause time (APT) as an output from said Random pause time function (RF), said output of the Random pause time function (RF) being within a predetermined range delimited by a minimum pause time and a maximum pause time, and permitting activation of the individual pump (2) after said Activation pause time (APT) has elapsed. In a second aspect the invention also relates to a pump (2) and a pump network (1) comprising a plurality of such pumps (2).
H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
E03F 5/22 - Adaptations of pumping plants for lifting sewage
F04D 15/02 - Stopping of pumps, or operating valves, on occurrence of unwanted conditions
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
The invention relates to a drainage pump assembly comprising a drainage pump (2) and an outlet conduit (3) connected to said drainage pump (2), the drainage pump (2) comprising a pump chamber and being configured to pump liquid comprising solid matter. The drainage pump assembly is characterized in that the outlet conduit (3) comprises a sedimentation trap (9) having an inlet opening (11), an outlet opening (12) and a belly (13) located between said inlet opening (11) and said outlet opening(12), and a first conduit (10) extending between the pump chamber of the drainage pump (2) and the belly (13) of the sedimentation trap (9),wherein said first conduit (10) comprises a non-return valve (14), and wherein the outlet opening (12) of the sedimentation trap (9) is configured to be connected to a second conduit (15).
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
The invention relates to a submersible machine guide assembly suitable for guiding a submersible machine (1) from an upper position towards an operative position, the guide assembly comprising a top mount (11) configured to be arranged at the upper region of the tank (2), a supporting member (12) configured to be arranged in the tank (2), two guide wires (13) running along each other in the vertical direction of the tank (2), wherein each of said guide wires (13) is connected to the top mount (11) at a first end and is connected to a seat (20) of the supporting member (12) at a second end, a runner (14) that is displaceable along said guide wires (13), the runner (14) comprising two guide members (25) that engage the guide wires (13) and that are connected to each other at the lower ends thereof, wherein the lower end of each guide member (25) is configured to engage the corresponding seat (20) of the supporting member (12) when the runner (14) is in the operative position, and a sliding bracket (15) configured to be connected to the submersible machine (1) and configured to engage the runner (14). The guide assembly is characterized in that the guide members (25) are connected to each other at the upper ends thereof, and in that the sliding bracket (15) is displaceable along the guide members (25) of the runner (14) when the runner (14) is located in the operative position.
The invention relates to a mixer for generating a flow of liquid, comprising a stationary body, an axially extending drive shaft protruding from said stationary body, a propeller, and a clamping sleeve assembly configured to interconnect the drive shaft and the propeller with each other in order to transmit a rotational motion. The clamping sleeve assembly has an axial clamping length, the clamping sleeve assembly comprising an inner clamping sleeve (7) and an outer clamping sleeve (8), wherein the inner clamping sleeve (7) has the shape of a tubular wall (9) having an inner surface (10) abutting the drive shaft and an outer surface (11) abutting the outer clamping sleeve (8) and wherein the outer clamping sleeve (8) has the shape of a tubular wall (12) having an inner surface (13) abutting the inner clamping sleeve (7) and an outer surface (14) abutting the propeller. The mixer is characterized in that both the inner surface (13) of the outer clamping sleeve (8) and the outer surface (11) of the inner clamping sleeve (7) are cylindrical along the axial clamping length, the inner surface (10) of the inner clamping sleeve (7), along the axial clamping length, having the shape of a truncated cone diverging towards a first end of the inner clamping sleeve (7), wherein the outer diameter of the inner clamping sleeve (7) is less than the inner diameter of the outer clamping sleeve (8) when both are unloaded, and wherein the tubular wall (9) of the inner clamping sleeve (7) comprises a slot (15) extending along the entire axial length of the inner clamping sleeve (7) and the tubular wall (12) of the outer clamping sleeve (8) comprises a slot (16) extending along the entire axial length of the outer clamping sleeve (8).
F16D 1/097 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hubCouplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic or segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring expansion only, e.g. with an expanded ring located between hub and shaft
B01F 7/00 - Mixers with rotary stirring devices in fixed receptacles; Kneaders
The invention relates to a method for controlling an ozone generator having a high-voltage electrode (5) and at least one counter electrode (1), wherein the high-voltage electrode (5) and the at least one counter electrode (1) bound an intermediate space, in which at least one dielectric is arranged and through which an oxygen-containing gas having a particle density ngas flows, and wherein the high-voltage electrode (5) and the at least one counter electrode (1) are provided with a connection point for a voltage supply (7) for producing silent discharges in at least one discharge gap, and wherein sparking distances d of the discharge are distributed between a least sparking distance dmin and a greatest sparking distance dmax, and wherein, for an ozone concentration to be produced that is greater than 12 wt% ozone, the voltage amplitude U0 of an alternating voltage at the voltage supply (7) is selected in such a way that U0 ឬ 130*10-21V*m2 * ngas * dmax * (CDL+Cg)/CDL, with CDL = capacitance of the dielectric and Cg = capacitance of the discharge gap.
C01B 13/11 - Preparation of ozone by electric discharge
11.
A METHOD FOR PROVIDING AN AXIAL GAP IN A CUTTER ASSEMBLY OF A GRINDER PUMP, AND A GRINDER PUMP COMPRISING A SHIM CONFIGURED FOR PROVIDING SAID AXIAL GAP
The invention relates to a method for providing an axial gap in a cutter assembly of a grinder pump () in order to secure an operative shearing action at a shearing interface in said cutter assembly. The invention also relates to a grinder pump () comprising a cutter wheel (5) connected to and driven in rotation by a drive shaft (16), the cutter wheel (5) comprising a set of cutting edges (13), and a cutter disc (6) stationary connected to a pump housing (3) and having a central hole (24) and a set of cutting holes (12), the drive shaft (16) and the cutter wheel (5) being interconnected via said central hole (24) of the cutter disc (6),wherein the cutter wheel (5) and the cutter disc (6) constitute said cutter assembly. The grinder pump is characterized in that a shim (27), that has a thickness equal to or greater than 0,05 millimeters and equal to or less than 0,15 millimeters and that is manufactured from degradable paper or plastic material, is clamped between the cutter wheel (5) and the cutter disc (6), wherein the grinder pump further comprises a locking member (26) acting against the cutter wheel (5) and the drive shaft (16) and fixating the axial gap between the cutter wheel (5) and the cutter disc (6) provided by said shim (27), wherein the set of cutting holes (12) of the cutter disc (6) are located radially outside an imaginary circle that is concentric with an axial center axis of the grinder pump and that has a fourth diameter (D4),an outer diameter (Do) of the shim (27) being lesser than said fourth diameter (D4)of the imaginary circle of the cutter disc (6).
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
F04D 29/62 - MountingAssemblingDisassembling of radial or helico-centrifugal pumps
B02C 18/00 - Disintegrating by knives or other cutting or tearing members which chop material into fragmentsMincing machines or similar apparatus using worms or the like
The invention relates to a cutter assembly configured for a grinder pump and comprising a cutter wheel (5) and a cutter disc (6) that interacts with each other. The cutter wheel (5) comprises a shaft portion (27) that is configured to interact with a central hole (24) of said cutter disc (6), a hub portion (14) that is connected to the shaft portion (27) and at least two main cutting edges (13) that in the radial direction extend outwards from said hub portion (14) and that are configured to interact with a set of cutting holes (12) of said cutter disc (6), wherein the shaft portion (27) comprises an axially extending cutting recess (28), and wherein the hub portion (14) comprises only one radially extending cutting recess (29). The cutter disc (6) comprises a suction side, a central hole (24) that is configured to interact with the shaft portion (27) of said cutter wheel (5) and a set of cutting holes (12) that open in said suction side radially outside the central hole (24) and that is configured to interact with the main cutting edges (13) of said cutter wheel (5), wherein the central hole (24) comprises two axially extending cutting recess (34) and wherein the suction side comprises a radially extending cutting recess (35) extending from the central hole (24), wherein the two axially extending cutting recesses (34) of the central hole (24) are arranged diametrically opposite each other.
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
B02C 18/00 - Disintegrating by knives or other cutting or tearing members which chop material into fragmentsMincing machines or similar apparatus using worms or the like
In a fist aspect the invention relates to a flush valve comprising an inlet (13), an outlet (14) and a valve arrangement (15), wherein the valve arrangement (15) comprises a first chamber (17), a second chamber (18) that is partly delimited by a diaphragm (21), and a conduit (19) extending between and connecting the first chamber (17) and the second chamber (18), a third chamber (22) that connects the inlet (13) and the outlet (14) of the flush valve (12) and that is partly delimited by said diaphragm (21), the third chamber (22) comprising a valve member (23) configured to control a fluid flow from the inlet (13) to the outlet (14) based on the position of said diaphragm (21), and a control mechanism arranged in said conduit (19). The flush valve is characterized in that the control mechanism comprises a stepper (25) and a plunger (26), the plunger (26) being biased towards an inactive position and being displaced towards an active position by means of the second pressure [P2] in the second chamber (18) when said second pressure [P2] in the second chamber (18) is greater than a threshold value [PT], the plunger (26) being configured to engage the stepper (25) when the plunger (26), wherein the stepper (25), each time the plunger (26) engages the stepper (25), changes position once in a repeated set of positions and wherein the stepper (25) in at least one position enables fluid communication between the first chamber (17) and the second chamber (18) via said conduit (19). In a second aspect the invention also relates to a pump station comprising such a flush valve.
The invention relates to an ultraviolet mercury low-pressure amalgam lamp (2) comprising: a tube (3) having a first end (1) and a second end; a first electrode (4) placed in the first end (1) of said tube (3); a second electrode placed in the second end of said tube, whereby when the lamp (2) is energized a discharge path is formed between said first and second electrodes; and at least one amalgam deposit (6) adjacent to one of said first and second electrodes out of the discharge path between said first and second electrodes, wherein the tube (3) has at least one constriction (7) wherein the at least oneamalgam deposit (6) is placed behind the constriction (7) with respect to the discharge path such that the at least one amalgam deposit (6) is protected by the constriction (7) from the heat emitted by the electrodes (4).
H01J 61/33 - Special shape of cross-section, e.g. for producing cool spot
H01J 61/20 - Selection of substances for gas fillingsSpecified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
H01J 61/72 - Lamps with low-pressure unconstricted discharge having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
The present invention relates to an apparatus (1) for the treatment of water, said apparatus comprising: - an elongated housing (2) having a first end and a second end, said first end having a water inlet (3)and said second end having a water outlet (4); - an elongated ultraviolet radiation source (5, 6) with a sleeve (6) concentrically located within the elongated housing (2), said elongated ultraviolet radiation source (5, 6) having at its first end electrical connections, which extend through said second end of the housing (2) and having a second free end (6') held in a support element (8), wherein the support element (8) comprises a supporting structure (10) containing a ring element (11) and from thereon radially inwardly running arms (12), wherein the arms (12) are designed in such away that during assembly the arms are resiliently deformed and wherein if assembled the arms are pressed against the sleeve (6), so that the free end (6') of the ultraviolet radiation source (5, 6) is held by the arms (12) in a resilient manner.
The invention relates to a particularly compact, efficient and operationally reliable pump device (10) for conveying fluid (126) to be pumped, comprising at least one drive unit (284) having a drive (62) and at least one receiving area (286), at which at least two pump cartridges (142, 142') can be positioned, which are hydraulically connected in series.
F04B 17/03 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
F04B 47/06 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
The invention relates to a treatment plant and a method for controlling such a treatment plant suitable for treatment of wastewater. The treatment plant comprises a circulation channel (2) housing said liquid, a submersible flow generating machine (6) arranged in the circulation channel (2) and generating a liquid flow along the circulation channel (2), and a control unit (7) that is operatively connected to said flow generating machine (6), wherein the flow generating machine (6) is driven in operation by said control unit (7). The method being characterized by the steps of: driving the flow generating machine (6) at a nominal speed, decreasing the rotational speed of the flow generating machine (6) from the set nominal speed, detecting the rotational speed at which the torque of the flow generating machine (6) is equal to a predetermined threshold, and determining the flow velocity of the liquid at the flow generating machine (6) based on a predetermined relationship between the rotational speed of the flow generating machine (6) and the flow velocity of the liquid.
In a fist aspect the invention relates to a pump for pumping a liquid, comprising an impeller (4) and an axially extending drive shaft assembly (5), wherein a distal end of the drive shaft assembly (5) is received in a central recess (8) of the impeller (4), the drive shaft assembly (5) comprising a drive shaft (14) and a connector (15), wherein the connector (15) comprises a sleeve (16) that is in telescopic engagement with the drive shaft (14), the impeller (4) during operation of the pump (1) being displaceable in the axial direction in relation to said sleeve (16) between a distal rest position and a proximal position. The pump is characterized in that the impeller (4) is biased towards the distal rest position by means of a spring member (25) arranged between the sleeve (16) and the impeller (4), the connector (15) comprising a hollow adjustment screw (31) that is in threaded engagement with an interior side of the sleeve (16) and configured to limit the maximum degree of telescopic overlap between the sleeve (16) and the drive shaft (14), wherein an impeller screw (33) extends through the adjustment screw (31) and is in threaded engagement with the drive shaft (14) in order to press the adjustment screw (31) towards the drive shaft (14). In a second aspect the invention also relates to an impeller assembly for such a pump.
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
F04D 13/08 - Units comprising pumps and their driving means the pump being electrically driven for submerged use
F04D 15/00 - Control, e.g. regulation, of pumps, pumping installations, or systems
F16D 1/097 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hubCouplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic or segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring expansion only, e.g. with an expanded ring located between hub and shaft
The invention relates to a method for stopping a submersible pump when the pump is snoring, wherein the pump is operatively connected to a control unit. The method is characterized by the steps of regulating, by means of the control unit, the operational speed of the pump in order to direct an average power of the pump towards a predetermined set level, determining whether the instantaneous power of the pump is outside a predetermined range, by monitoring at least one of the parameters: power [P], current [I] and power factor [cosφ], determining whether the operational speed of the pump is increasing, and stopping the pump due to snoring, by means of the control unit, when the instantaneous power of the pump is determined as being outside the predetermined range at the same time the operational speed of the pump is determined as increasing.
F04B 47/02 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
F04B 47/06 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
A low pressure mercury gas discharge ultraviolet lamp with a tubular elongate body (2) with two opposing ends, a first end (4) and a second end (5), which contains a gas filling (3), and with at least two electric connectors at each end, which are electrically connected to at least one filament being provided at each end, wherein a discharge length (I) is defined between the filaments, is disclosed, in which at least two filaments (a,c and b,d) are provided at each end of the discharge length (I), wherein the filaments (a,c; b,d) can be individually supplied with electric energy, and wherein the at least two filaments (a,c) at the first end (4) are of different size and different mass, and the at least two filaments (b,d) at the second end (5) are of different size and different mass.
In a liquid treatment system with an inlet (1) and an outlet (9) defining a liquid flow direction from the inlet (1) to the outlet (9), a liquid treatment zone (16) arranged between the inlet (1) and the outlet (9), the liquid treatment zone (16) comprising a number of ultraviolet radiators arranged to radiate ultraviolet radiation into a liquid flowing through the treatment zone (16), a first transition zone (11) downstream of the inlet (9) and a second transition zone (17) upstream of the outlet (9), which adapt the cross section of the inlet (1) to the cross section of the treatment zone (16), and the cross section of the treatment zone (16) to the cross section of the outlet (9), respectively, wherein the inlet (1), the transition zones (11, 17), the treatment zone (16) and the outlet (9) confine the liquid flow in a closed channel, greater durability of the radiators and the channel wall material is achieved by providing a degassing (13) between the inlet (1) and the treatment zone (16) at the top of the channel.
The invention relates to a process for producing ozone at elevated pressure having a capacity of at least 1 kg of ozone/h by means of an ozone generator having a high-voltage electrode (5) and at least one counterelectrode (1), wherein the high-voltage electrode (5) and the at least one counterelectrode (1) delimit an interspace in which at least one dielectric is arranged and which is traversed by an oxygen-containing gas at a gas pressure pgas and wherein the high-voltage electrode (5) and the at least one counterelectrode (1) are provided with a connection for an electrical voltage supply (7, 8) for generating discharges in at least one discharge gap, wherein the voltage supply provides a high-voltage in a range from 1 kV to 50 kV and wherein arcing distances di (9) of the discharge have a distribution between a smallest arcing distance dmin and a largest arcing distance dmax and wherein the gas pressure pgas of the oxygen-containing gas is at least 3 bar.
A UV radiator unit is disclosed comprising • - an elongated gas discharge lamp with an essentially cylindrical UV transparent lamp body (15) with sealed ends (20), which encloses a gas volume (18), wherein the lamp body (15) defines a longitudinal axis (2) and has an outer diameter, • - a UV transparent sleeve tube (16) with an inner diameter, which surrounds the lamp body (15) and wherein the inner diameter is larger than the outer diameter of the lamp body (15), • - at least one damping ring (1) interposed between the lamp body (15) and the sleeve tube (16), wherein • - the damping ring (1) comprises a first side element (3) and a second side element (4), wherein an axial distance is provided between the first side element (3) and the second side element (4), and at least one connecting portion (6), which physically connects the first side element (3) and the second side element (4).
According to a first aspect the present invention relates to a pump station arrangement for removing harmful fluids from wastewater, wherein the pump station arrangement (1) comprises a pre-chamber (2), a pump sump (3), a recirculation channel (26) extending from the pump sump (3) to the pre-chamber (2), and a gas sensor (28) arranged in the pump sump (3) and configured to measure the content of harmful fluids in the form of gas in the pump sump (3), wherein the pump station arrangement is configured to recirculate the wastewater via the recirculation channel (26) from the pump sump (3) to the pre-chamber (2) if the measured content of harmful fluids in the form of gas in the pump sump (3) exceed a predetermined value. According to a second aspect the present invention relates to a method for removing harmful fluids from wastewater in such a pump station arrangement.
In a first aspect the invention relates to a pipe connector for connecting a first element to a second element. The pipe connector comprises a pipe segment (11), a first flange (12) located at a first end of the pipe segment (11) and configured to be connected to said first element, and a second flange (13) located at a second end of the pipe segment (11) and configured to be connected to said second element. The pipe connector (1) is characterized in that said first flange (12) comprises a circumferential anchor flange (18) that is fixed connected to the pipe segment (11) at said first end, a flange insert (19) that is displaceable in the axial direction of the pipe connector (1) in relation to the anchor flange (18) between a retracted position and an extended position, and means for displacing the flange insert (19) in relation to the anchor flange (18), in the direction running axial from the second end towards the first end of the pipe segment (11), wherein the flange insert (19) in the extended position protrude in the axial direction in relation to said anchor flange (18). In a second aspect the invention also relates to a pipe connector unit comprising such a pipe connector (1) and an adaptor (8).
F16L 23/036 - Flanged joints the flanges being connected by members tensioned axially characterised by the tensioning members, e.g. specially adapted bolts or C-clamps
F16L 25/12 - Joints for pipes being spaced apart axially
26.
PUMP DEVICE, INDUSTRIAL WATER SYSTEM, METHOD FOR OPERATING AN INDUSTRIAL WATER SYSTEM, AND SELF-TEACHING METHOD FOR A DELIVERY PUMP IN AN INDUSTRIAL WATER SYSTEM
Disclosed is a pump device to be arranged on a recirculation pipe (24) in an industrial water system (10), said pump device comprising a delivery pump (116), a check valve (32) and a bypass pipe (34) for the check valve (32); the bypass pipe (34) is arranged parallel to the check valve (32), and a combination (36) consisting of the check valve (32) and the bypass pipe (34) is arranged in series to the delivery pump (116).
The invention relates to a feed pump for increasing pressure in a line (12), comprising a feed chamber (40) for feed fluid, comprising at least one temperature sensor (42), which is arranged in the feed pump (16), which temperature sensor is associated with the feed chamber (40), is in thermal contact with the feed chamber (40), and by which a temperature of feed fluid in the feed chamber (40) can be determined, comprising a temperature regulator (52), which is associated with the at least one temperature sensor (42), and by which defined temperature conditions can be produced in the environment (54) of the at least one temperature sensor (42), and an evaluation device (48), to which the at least one temperature sensor (42) is coupled for signalling purposes and which determines from data of the at least one temperature sensor (42) whether or not feed fluid flows through the feed chamber (40).
The present invention relates to a method and an installation for treating a main wastewater stream (1') flowing in a closed conduit (1) with a flow direction, the method comprising the steps of: introducing a liquid into at least one pre-treatment stream (10´); generating a gas stream containing ozone gas; introducing the gas stream into the at least one pre-treatment stream (10´) each with a gas injector (15), resulting in at least one mixed-phase stream comprising ozone laden gas and liquid; passing the at least one mixed-phase stream through at least one static mixer (17, 17´), resulting in a predefined gas bubble size; and injecting the at least one mixed-phase stream (10´) in the main wastewater stream (1') perpendicular to the flow direction.
The invention relates to an ozone generator comprising a high-voltage electrode and at least one counter electrode, which define an interstice in which at least one dielectric and an electrically non-conductive structure is arranged and through which a gas flows in the flow direction, the high-voltage electrode and the at least one counter electrode being provided with a connection for an electrical voltage supply unit to generate silent discharges, the electrically non-conductive structure comprising pores, the nominal pore size (x) thereof being 100 μηκ x ឬ 1 mm.
The invention relates to an ozone generator (1) with a high voltage electrode (2, 2') and at least one counter electrode (4, 4') which limit a gap (5, 5') in which at least one dielectric (3, 3') is arranged and which is flowed through by a gas flow (6, 6') in the direction of flow, wherein the high voltage electrode (2, 2') and the at least one counter electrode (4, 4') are provided with a connection for an electrical power supply to generate silent discharges, and a fabric (7) is arranged in the gas flow (6, 6'), said fabric (7) comprising a material combination consisting of at least one wire (8) and at least one electrically non-conductive fibre (9).
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Electric and electronic control, monitoring and measuring
devices, especially for water and wastewater treatment
installations; parts of all afore-mentioned goods, namely
transformers, rectifiers, high frequency converters,
measurement sensors and measurement transducers, electric
cables and electrodes; electric ozone generators with
electrodes for the generation of ozone using high voltage
and/or high frequency. Mobile and stationary apparatus and devices for the
treatment of liquids, solids and gases, especially for
reconditioning, disinfecting, sterilizing, oxidising and/or
deodorizing of water and waste water by means of ultraviolet
radiation, ozone and/or other oxidants; ultraviolet
radiators for disinfection devices; parts of all
aforementioned goods.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Electric and electronic control, monitoring and measuring
devices, especially for water and wastewater treatment
installations; parts of all afore-mentioned goods, namely
transformers, rectifiers, high frequency converters,
measurement sensors and measurement transducers, electric
cables and electrodes; electric ozone generators with
electrodes for the generation of ozone using high voltage
and/or high frequency. Mobile and stationary apparatus and devices for the
treatment of liquids, solids and gases, especially for
reconditioning, disinfecting, sterilizing and/or deodorizing
of water and waste water by means of ultraviolet radiation,
ozone and/or other oxidants; ultraviolet radiators for
disinfection devices; parts of all aforementioned goods.
33.
METHOD FOR CONTROLLING A TREATMENT APPARATUS ARRANGEMENT, A TREATMENT APPARATUS ARRANGEMENT FOR A TREATMENT PLANT AS WELL AS A TREATMENT PLANT
According to a first aspect the invention relates to a method for controlling a treatment apparatus arrangement (3) in a treatment plant (1), the treatment plant (1) comprising a basin (2) housing a liquid comprising solid matter, the operating condition in said basin (2) being anoxic and/or anaerobic, and said treatment apparatus arrangement (3) that comprises at least one mixer machine (4) located in said basin (2) and a variable speed drive (5) operatively connected to said mixer machine (4 ). The variable speed drive (5) operates the mixer machine (4) alternately in a Normal Operation Mode, in which an operational speed of the mixer machine (4) is at least the highest of a suspension speed and a process speed, and a Reduced Operation Mode, in which the operational speed of the mixer machine (4) is below said suspension speed. According to a second aspect the invention also relates to a treatment apparatus arrangement and a treatment plant, respectively.
09 - Scientific and electric apparatus and instruments
Goods & Services
(1) Pumps, namely, wastewater pumps; mixers, namely, wastewater mixers; aerators, namely, aerators for treating wastewater; motors for pumps, namely, electric motors for wastewater pumps; motors for mixers, namely, electric motors for wastewater mixers; motors for aerators, namely, electric motors for wastewater aerators
(2) Controllers and drives for pumps, mixers and aerators, namely, electric and electronic controllers and drives for wastewater pumps, wastewater mixers and wastewater aerators; software for pump, mixer and aerator controllers and drives, namely, software for operating and controlling electric and electronic wastewater pump controllers and drives, for wastewater mixer controllers and drives and for wastewater aerator controllers and drives
35.
OZONE GENERATOR WITH POSITION-DEPENDENT DISCHARGE DISTRIBUTION
The invention relates to an ozone generator comprising a high-voltage electrode (5) and at least one counter electrode (1), which define an interstice in which at least one dielectric (2) is arranged and through which a gas flows in the flow direction, the high-voltage electrode (5) and the at least one counter electrode (1) being provided with a connection for an electrical voltage supply unit (7) to generate silent discharges that originate from surface points, and the average distance between the high-voltage electrode (5) and the at least one counter electrode (1) and the average striking distance being constant while the number of surface points from which the silent discharges originate decreases in the direction of flow.
The invention relates to an ozone generator comprising a high-voltage electrode (5) and at least one counter electrode (1), which define an interstice in which at least one dielectric (2) is arranged and through which a gas flows in the flow direction, the high-voltage electrode (5) and the at least one counter electrode (1) being provided with a connection for an electrical voltage supply unit (7) to generate silent discharges, a flat wire structure being arranged in the gas flow and its density decreasing in the flow direction.
The invention relates to a method for determining the UV transmittance of water in a UV disinfection system through which water flows, wherein the UV disinfection system has a plurality of emitter assemblies (1) each comprising: a UV radiation source (2); a cladding tube (3) that surrounds the UV radiation source (2), which cladding tube has an end face (13) on one open end (12); and a UV-C sensor (6) which detects UV light emerging from the cladding tube (3) without the influence of the water. The UV disinfection system also has at least one further UV sensor (23), which is arranged at a distance from the cladding tubes (3) of the emitter assemblies (1), wherein the method has the following method steps: a) for at least one emitter assembly (1), measuring the UV radiant power emerging from the cladding tube (3) by means of the UV-C sensor (6); b) measuring a quantity of the transmitted radiant power by means of the at least one further UV sensor that is spaced apart from the UV radiation sources; c) determining the transmittance of the water by means of a quantity of the emerging radiant power and of the transmitted radiant power.
G01N 21/33 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
The invention relates to an emitter arrangement (1) comprising a UV irradiation source (2), a cladding tube (3) surrounding the UV irradiation source (2), said cladding tube having an end face (13) on an open end (12), and a UV-C sensor (6) having a sensitive area, wherein the UV-C sensor (6) is in optical connection with the end face (13) of the cladding tube (3), so that the sensitive area of the UV-C sensor (6) can detect the UV irradiation emerging from the end face (13) of the cladding tube (3) during the operation of the UV irradiation source (2).
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
(1) Electric and electronic industrial controls for monitoring and measuring water and wastewater treatment; parts of all afore-mentioned goods, namely electric transformers, current rectifiers, high frequency converters, measurement sensors, namely, flow sensors, light sensors, gas sensors and measurement transducers, namely, electromechanical transducers, electric cables and electrodes, namely, electrostatic discharge electrodes; electric ozone generators with electrodes for the generation of ozone using high voltage and high frequency.
(2) Mobile and stationary apparatus and devices, namely, ultraviolet water purifier, water filtering units for industrial use, water distillation units, water conditioning units, for the treatment of liquids, solids and gases for the purpose of reconditioning, disinfecting, sterilizing and deodorizing of water and waste water by means of ultraviolet radiation, ozone and other oxidants and parts of the aforementioned goods; ultraviolet radiators for disinfection devices and parts of the aforementioned goods.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
(1) Electric and electronic industrial controls for monitoring and measuring water and wastewater treatment; parts of all afore-mentioned goods, namely electric transformers, current rectifiers, high frequency converters, measurement sensors, namely, flow sensors, light sensors, gas sensors and measurement transducers, namely, electromechanical transducers, electric cables and electrodes, namely, electrostatic discharge electrodes; electric ozone generators with electrodes for the generation of ozone using high voltage and high frequency.
(2) Mobile and stationary apparatus and devices, namely, ultraviolet water purifier, water filtering units for industrial use, water distillation units, water conditioning units, for the treatment of liquids, solids and gases for the purpose of reconditioning, disinfecting, sterilizing and deodorizing of water and waste water by means of ultraviolet radiation, ozone and other oxidants and parts of the aforementioned goods; ultraviolet radiators for disinfection devices and parts of the aforementioned goods.
The invention relates to a temperature control apparatus (1) for controlling the temperature of biomass in a receptacle (20), comprising at least one temperature control means (3) and at least one conveying device (2) for conveying a mass flow of biomass along a main flow direction; the at least one conveying device (2) includes at least one stirrer (2), and the at least one temperature control means (3) is placed in the main flow direction generated by the at least one conveying device (2); the at least one temperature control means (3) is tubular, having an inner tube (12) and an outer tube (13) that is coaxial to the inner tube (12); the inner tube (12) and the outer tube (13) form an interstice through which a temperature control medium can flow, and the at least one temperature control means (3) is oriented in relation to the at least one conveying device (2) in such a way that during operation of the heating device (1), at least 40% of the conveyed volume of the mass flow (11) generated by the at least one conveying device (2) flows through the inner tube (12).
The invention relates to a chain tensioning arrangement (2) for a column pipe which is configured to house a submersible pump. The chain tensioning arrangement is characterized in that it comprises a radially extending cross beam (13), a spring arrangement (16) connected to the cross beam (13) and comprising at least one spring member (17), and an arm (18) that is movably connected to the cross beam (13) and that comprises an engagement member (19) configured to optionally engage a chain connected to said pump. The arm is displaceable in the axial direction between a lower position and an upper position. The spring member is arranged to displace the arm in the direction from the lower position towards the upper position. The invention also relates to a pump station comprising a column pipe, a submersible pump arranged in the column pipe and an axially extending chain connected to the pump and configured to move the pump in the column pipe. The pump station is characterized by the inventive chain tensioning arrangement.
The invention relates to a method for managing a wastewater treatment process. The method comprises at least the steps of measuring an amount of at least one nitrogen-containing substance in the influent wastewater (CN, influent), and determining an amount of phosphorous to be removed from the influent wastewater (CP, influent) based on the measured amount of at least one nitrogen-containing substance in the influent wastewater (CN, influent).
The invention relates to a method for treating wastewater (5). This is achieved by using a coagulant that aggregates a phosphorus- containing substance. The method comprises the step of: executing a reaction phase having a biological treatment phase and a subsequent chemical treatment phase. The chemical treatment phase comprises the first substep of mixing the wastewater (5) while injecting (17) a predetermined dose of the coagulant into the basin (1), the injection (17) taking place at a location (17) in which the speed of the wastewater is equal to or more than 0,5 m/s in order for the coagulant to contact and coagulate the phosphorus-containing substances, wherein the injection (17) of the dose of the binding compound into the basin (1) is performed during a time period equal to or more than a time period required to accomplish two mixing turnovers of the wastewater (5) and equal to or less than a time period required to accomplish seven mixing turnovers of the wastewater (5), and the second substep of mixing the wastewater (5) such that an average speed of the wastewater (5) in the basin (1) is equal to or more than 0,1 m/s and equal to or less than 0,4 m/s, in order to flocculate the coagulated substance.
The invention relates to a method for regulating a water treatment plant (2) having an inlet (3), an ozonation stage (4), a transfer stage (5), at least one biological filter (6) and an outlet (7), comprising the following process steps: measuring a first parameter set in the inlet (3) by means of a UV/Vis sensor (8), wherein, based on the first parameter set, a measurement is determined for a first concentration of micro-contaminants (c1) and/or a nitrite concentration (n1); controlling the ozonation stage (4) such that ozone is supplied at a preselected ratio to the measured first parameter set (c1, n1); measuring a second parameter set in the transfer stage (5) by means of a UV/Vis sensor (9), wherein, based on the second parameter set, a measurement is determined for a second concentration of micro-contaminants (c2); regulating the ozonation such that the quotient of (c1-c2)/c1, representing the difference between the first concentration of micro-contaminants (c1) and the second concentration of micro-contaminants (c2) divided by the first concentration of micro-contaminants (c1), adopts a value between a predetermined minimum value and a predetermined maximum value; measuring a third parameter set in the process (7) by means of a UV/Vis sensor (10), wherein, based on the third parameter set, a measurement for a third concentration of micro-contaminants (c3) is determined; if the measurement for the concentration of micro-contaminants (c3) in the process (7) exceeds a predetermined maximum value, increasing the ozone supply in step 1.2.
A method for operating a fluid delivery system which comprises at least one delivery pump which delivers delivery fluid is provided, in which a speed of the at least one delivery pump is varied in a controlled manner, wherein the speed variations differ by 25% or less than 25% based on a normal speed of the at least one delivery pump during normal operation, and the speed variations are carried out temporarily for a period of time of five minutes or less than five minutes, a reaction of the fluid delivery system to the speed variation is determined, information regarding the fluid delivery system is obtained from the reaction and, by means of the information obtained, the fluid delivery system is characterized and/or adjustments to the at least one delivery pump are carried out.
The invention relates to a plant and a method for controlling such a plant suitable for treatment of waste water. The plant (1) comprises a basin (2), at least one flow generating machine (6) adapted to generate a liquid flow in the basin (2), at least one equipment (7) in the basin (2) that effects the momentum of the liquid flow, and a control unit (8). The method being characterized by the steps of in the control unit (8) storing a predetermined relationship between the operational speed N of the flow generating machine (6) and an operational parameter P from which the torque M of the flow generating machine (6) may be derived, which relationship depends on a predetermined liquid flow speed V in the basin (2) by the flow generating machine (6), determining the operational speed N of the flow generating machine (6), from the determined operational speed N determining a set value of the operational parameter P of the flow generating machine (6) based on said relationship between the operational speed N of the flow generating machine (6) and the operational parameter P of the flow generating machine (6), by means of the control unit (8) determining a real value of the operational parameter P of the flow generating machine (6), and by means of the control unit (8) adjusting the operational speed N of the flow generating machine (6) if the real value of the operational parameter P of the flow generating machine (6) is different than the set value of the operational parameter P of the flow generating machine (6).
B01F 7/06 - Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with propellers
B01F 3/04 - Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed gases or vapours with liquids
48.
METHOD FOR SHUTTING OFF A PUMP AS WELL AS PUMP STATION ARRANGEMENT
According to a first aspect the present invention relates to a method for turning off a pump (2) configured for pumping liquid via a conduit (4), the pump (2) before being turned off being driven at an operational frequency (FN) by means of a control unit (6). The method is characterized by the steps of, ramping down the frequency of the pump (2) due to a turn off instruction, the terminal frequency of the ramping down being equal to the operational frequency (FN) of the pump (2) minus at least 10Hz and the ramping down time being at least a reflection time (TR) for the conduit in question, and the terminal frequency of the ramping down not being less than 10Hz, and stopping the pump (2) after said ramping down. According to a second aspect the present invention relates to a pump station arrangement configured for performing the above mentioned turning off method.
F04D 15/00 - Control, e.g. regulation, of pumps, pumping installations, or systems
F04B 49/02 - Stopping, starting, unloading or idling control
F04D 15/02 - Stopping of pumps, or operating valves, on occurrence of unwanted conditions
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
F04D 1/00 - Radial-flow pumps, e.g. centrifugal pumpsHelico-centrifugal pumps
F04D 13/08 - Units comprising pumps and their driving means the pump being electrically driven for submerged use
The invention relates to a method for controlling a pump arrangement upon clogging of a pump, the pump arrangement comprising a pump and a control unit, the pump comprising a motor, and the control unit being arranged to drive said motor, the motor during operation being associated with an operational parameter from which the torque of the motor may be derived, said operational parameter has a normal value PN during normal operation of the motor in a first direction. The method being characterized by the steps of driving the motor in a first direction by means of the control unit, stopping the motor if a real value P of the operational parameter exceed a predetermined clogging limit PI, where PI ≥ 1,05*PN, driving the motor in a the first direction opposite second direction a predetermined flushing time TR by means of the control unit, and stopping the motor if the absolute value of the real value P of the operational parameter during the flushing time TR exceed the absolute value of a first unfastening limit PL1, where | PL1I ≥ 1, 1*PI, otherwise stopping the motor after said flushing time TR and returning to normal operation.
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
The invention relates to a guide rail assembly for a submersible machine as well as a guide rail holder for such a guide rail assembly. The guide rail holder is characterized in that it comprises a radially extending support body (10), an axially extending post (12), which is rigidly connected to said support body (10) and which is adapted to be inserted into an end of said guide rail(4), an engagement head (14) that is connected to said post (12) at a distance from said support body (10) and has a greater radial extension than said post (12), the engagement head (14) comprising a radially expandable member (16) that is adapted to be reversibly manipulated between an active state, in which the expandable member (16) is in engagement with the guide rail(4), and an inactive state, in which the expandable member (16) is disengaged from the guide rail (4).
The invention relates to a pump station for wastewater and an insert for such a pump station. The pump station comprises a tank (2) with a base (6) and a circumferential wall (7) axially extending from said base (6), and at least one insert (13). The insert (13) is arranged in said tank (2) and is arranged axially displaceable in said tank (2) between a lower resting position and a floating position in the tank (2), wherein said at least one insert (13) comprises a container with a liquid tight shell (14) and at least one pump (15) installed in said container, wherein an inlet (16) of said at least one pump (15) is in fluid tight connection with a through hole (17) in the shell (14).
The invention relates to a pump station for wastewater, comprising a tank (2) with a base (3) and a circumferential wall (4) axially extending from said wall. The pump station (1) is characterized in that it comprises an insert arrangement with at least one insert (15) that is releasable anchored in said tank (2), wherein said at least one insert (15) comprises a container (16) with a liquid tight shell and at least one pump (19) installed in said container (16), wherein an inlet (20) of said at least one pump (19) is in fluid tight connection with a through hole (21) in the shell of the container (16). The invention also relates to an insert (15) for such a pump station (1).
The invention relates to a treatment plant and a method for controlling such a treatment plant suitable for treatment of waste water. The treatment plant comprises a circulation channel (2) adapted to house a liquid, an aeration arrangement (5) adapted to supply a gas flow Q comprising oxygen to the liquid, at least one flow generating machine (10) arranged in the circulation channel (2) and adapted to generate a liquid flow along the circulation channel (2), and a control unit (11). The method is characterized by the steps of providing a gas flow Q to the liquid by means of the aeration arrangement (5), operating the flow generating machine (10) at an operational speed f to generate a liquid flow, measuring at least one process parameter which, directly or indirectly, provide an indication of the oxygen transfer rate to the liquid in the treatment plant (1), comparing the measured value of said process parameter with a set value, adjusting the oxygen transfer rate to the liquid in the treatment plant (1) if a difference between the measured value of the process parameter and the set value is determined, the oxygen transfer rate of the treatment plant (1) being adjusted by adjusting the gas flow Q provided by the aeration arrangement (5) as well as adjusting the operational speed f of the flow generating machine (10), in order to guide the value of said process parameter towards said set value.
The invention relates to an impeller assembly and a pump for pumping a liquid, comprising a pump chamber and an impeller (4) arranged to rotate in said pump chamber, said impeller being suspended in a lower end (5) of an axially extending drive shaft unit (6), wherein said lower end (5) of the drive shaft unit (6) is received in a cylinder-shaped recess (10) of the impeller (4), wherein the impeller (4) is displaceable back and forth in the axial direction in relation to the drive shaft unit (6). The impeller further comprises an axially extending hole (21) that connects the cylinder-shaped recess (10) and the pump chamber and that the drive shaft unit (6) comprises an axially extending pin (22) that projects from said lower end (5) of the drive shaft unit (6), wherein said pin (22) is arranged in said hole (21).
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
F04D 15/00 - Control, e.g. regulation, of pumps, pumping installations, or systems
The invention relates to an impeller assembly and a pump for pumping a liquid, comprising a pump chamber and an impeller (4) arranged to rotate in said pump chamber, said impeller being suspended in a lower end (5) of an axially extending drive shaft unit (6), wherein said lower end (5) of the drive shaft unit (6) is received in a cylinder-shaped recess (10) of the impeller (4), wherein the impeller (4) is displaceable back and forth in the axial direction in relation to the drive shaft unit (6) between a lower position and an upper position. The pump further comprises a snap-lock coupling arranged at the interface between the drive shaft unit (6) and the cylinder-shaped recess (10), wherein the snap-lock coupling is adapted to position the impeller (4) in the lower position when an applied force acting to displace the impeller (4) in direction away from the lower position is below a threshold value.
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
Propeller pump (3) for pumping liquid, comprising: an axially extending tubular pump housing (8) having an inner surface (9), an axially extending pump core (10) having an envelop surface (11), at least one axial part section of the pump core (10) being enclosed of said pump housing (8), and the pump core (10) comprising a propeller (15) having a hub (16) and at least one blade (17), and at least one guide vane (18) that comprises an upstream located leading edge (19) and a downstream located trailing edge (20), and that in the circumferential direction comprises a pressure side (PS) and a suction side (SS), said at least one guide vane (18) extending between the inner surface (9) of the pump housing (8) and the envelope surface (11) of the pump core (10). At the leading edge (19) of said at least one guide vane (18) a connection angle (a) between the suction side (SS) of the guide vane (18) and the envelope surface (11) of the pump core (10), is bigger than 90 degrees.
The invention relates to a method for controlling at least a part of a pump station (1) comprising at least a speed controlled pump (2) arranged in a container (3), wherein the method comprises a sub-method (Determine Espec) that is arranged for determining the specific energy consumption Espec of said at least one pump (2), and which involves the steps of operating said pump (2) for at least two different speeds (n1, n2,...) and for each of said at least two speeds (n1, n2,...) in connection to one predetermined measurement level (hmeasure) in the container (3) determining consumed power P(n1, n2,...) and determining outgoing fluid flow Q(n1, n2,...) from the container (3), and deriving the pump's (2) power curve P(n) from the at least two determined values of consumed power P (n1, n2,...), and deriving the pump's (2) pump flow curve Q n) from the at least two determined values of outgoing fluid flow Q(n1, n2,...), and determining the pump's (2) specific energy consumption (Espec) as the quotient of the pump's (2) power curve P(n) divided with the pump's (2) pump flow curve Q(n).
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
F04D 13/16 - Pumping installations or systems with storage reservoirs
58.
A PERFORATING MACHINE AND A METHOD FOR PERFORATING A MEMBRANE
The present invention relates to a perforating machine and a method for perforating a membrane (1) by means of such a perforating machine comprising at least one needle (2) and a support (3), wherein the method comprises the steps: a) placing the membrane (1), said membrane being made of a thermoplastic, onto the support (3), said support having a temperature (TU) that is below the melting temperature (TMM) of the membrane (1), b) bringing said at least one needle (2), said needle being heated to a temperature (TN)exceeding the melting temperature (TMM) of the membrane (1), and said support (3) in the direction towards each other, while said at least one needle (2) penetrates the membrane (1), c) stopping the mutual displacement of the at least one needle (2) and the support (3), once said at least one needle (2) comes in contact with the support (3), d) bringing said at least one needle (2) and said support (3) in the direction away from each other, and e) removing the perforated membrane (1) from the support (3).
The present invention relates to an aerator assembly for diffusing a gas in a liquid, comprising a gas supply conduit (2) and at least one aerator (3), wherein the gas supply conduit (2) and the aerator (3) are releasably joined to each other by means of an attachment means (23). The aerator assembly is characterised in that, the attachment means (23) comprises a flexible body (25) and a compressions means (26), wherein the attachment means (23) is arranged to be reversibly set in an inactive mode, in which the gas supply conduit (2) and said at least one aerator (3) are in mutually released mode, as well as in an active mode in which the flexible body (25) is compressed in its axial longitudinal direction by means of the compression means (26) and clamps said at least one aerator (3) and the gas supply conduit (2) against each other.
The invention relates to a pump for pumping a liquid, comprising a hydraulic unit (1), which comprises a pump housing (2), an insert ring (3) and an impeller (4) arranged to rotate in said pump housing (2), the hydraulic unit (1) comprising an upstream inlet opening (9) and a downstream outlet opening (10) and delimiting in succession an inlet (11), a pump chamber (12) and an outlet (13), the insert ring (3) being connected to the pump housing (2) in the area of the transition between said inlet (11) and said pump chamber (12) and is displaceable in the axial direction in relation to said pump housing (2), the insert ring (3) being in threaded engagement with the pump housing (2) and being turnable in relation to said pump housing (2), and at least one locking member (19) is arranged at the interface between the insert ring (3) and the pump housing (2). The pump is characterized in that the insert ring (3) is right-threaded and the direction of rotation of the impeller (4) is counter-clockwise, when seen from the upstream inlet opening (9).
F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous
F04D 29/42 - CasingsConnections for working fluid for radial or helico-centrifugal pumps
The invention relates to a pump station comprising a tank (2) and a pump unit (16) that is lowerable into said tank (2), the tank (2) comprising a bottom (4) and a peripheral wall (5) extending from the bottom (4), the wall (5) having an inlet (9) for incoming liquid flow and an outlet (10) for outgoing liquid flow. The pump station is characterized in that the pump unit (16) comprises a cross beam (17) and a pump (18) connected to said cross beam (17), and that the inside of the wall (5) of the tank (2) presents a set of axially extending guide members, which set comprises at least a first guide member (11) arranged to receive and guide a first end (19) of the cross beam (17) and a second guide member (12) arranged to receive and guide second end (20) of the cross beam (17).
The invention relates to a pump for pumping liquid, the pump comprising a drive unit (3) and a heat sink (23) connected to said drive unit (3), which heat sink is arranged to carry off heat that is generated in said drive unit during operation of the pump, the drive unit comprising a motor compartment (10) that in the radial direction is delimited by a motor casing (22) and that accommodate an electric motor (17) having a stator (16), a coupling compartment (11) that at least partly is delimited by a pump top casing (14) and that accommodate a power supply component (15), an upper partition (20) that is arranged between said motor compartment (20) and said coupling compartment (11). The pump is characterized in that the motor casing (22) comprises an outer jacket (24) that is connected to and that in the axial direction extends between the upper partition (20) and the heat sink (23), an inner stator housing (25) that extends between the stator (16) and the heat sink (23), and a gas filled gap (26) that in the radial direction separate the outer jacket (24) and the inner stator housing (25).
The invention relates to a method for controlling a pump station (1) comprising a pump well (3) for accommodating liquid and at least one in said pump well (3) located pump (2) for pumping liquid from the pump well (3), said at least one pump (2) being arranged to take an inactive state and an active state, respectively. The method is characterized in that it comprises the steps of initiating a pump cycle having a predetermined pump cycle length, bringing said at least one pump (2) to said active state, registering a pump time that run from the point of time when said at least one pump (2) was activated, and determining a stop time for said pump time, which stop time occur when the pumped quantity of liquid during said pump time, calculated from a predetermined pump capacity of said at least one pump (2), is greater than or equal to a calculated liquid inflow to the pump well (3) during the present pump cycle.
The invention relates to a treatment plant for waste water treatment, comprising a circulation tank (2), which is arranged to accommodate waste water up to a predetermined filling height (H), and at least one aerator section (5) arranged at the bottom of the circulation tank (2), which aerator section (5) is arranged to supply gas bubbles to the waste water, the circulation tank (2) having a predetermined direction of flow along which the waste water is arranged to flow. The treatment plant is characterized in that the same comprises a partition wall (7) arranged transversely to the circulation tank (2) downstream the aerator section (5), which partition wall (7) has an upper end (9) that in the vertical direction is situated at a height (h) that is lower than 25% of the above-mentioned filling height (H).
