A filter filters a flow of liquid and has a pressure vessel, a filter assembly deployed within the pressure vessel, and a backwash assembly. The pressure vessel has an inlet, an outlet, and a flow path in fluid communication with the outlet. The filter assembly has at least one filter unit and at least one support configuration that supports the at least one filter element. The at least one filter element has first and second coarse mesh material support layer that have apertures of a first and second size, respectively, and a cloth filter layer that has apertures of a third size smaller than the first and second sizes. The cloth filter layer is interposed between the first and second coarse mesh material support layers. The backwash assembly has a suction nozzle in facing relation to a first or second surface of the filter unit.
A filter includes a filter assembly deployed within a pressure vessel. The filter includes a series of filter configurations arranged along a central flow path connected to an outlet. Each filter configuration has filter screens overlying at least one filtrate channel which directs filtered fluid to the central flow path, A partition is deployed within the pressure vessel so as to subdivide the pressure vessel into a first filter chamber and a second filter chamber, each containing a number of the filter assemblies. A flow diverter is deployed in the central flow path for diverting a flow of filtered liquid passing along the central flow path from the first filter chamber so as to flow outwards from the central flow path to undergo a second filtering in the second filter chamber. Also disclosed is an outlet flow throttling arrangement to avoid overload of a backwash cleaning system.
B01D 33/23 - Construction of discs or component sectors thereof
B01D 33/50 - Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
B01D 29/41 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
B01D 29/62 - Regenerating the filter material in the filter
B01D 29/54 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
B01D 33/44 - Regenerating the filter material in the filter
B01D 33/39 - Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection concentrically or coaxially
B01D 29/58 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
B01D 33/46 - Regenerating the filter material in the filter by scrapers, brushes or the like acting on the cake-side of the filtering element
A filter includes a filter assembly deployed within a pressure vessel. The filter includes a series of filter configurations arranged along a central flow path connected to an outlet. Each filter configuration has filter screens overlying at least one filtrate channel which directs filtered fluid to the central flow path, A partition is deployed within the pressure vessel so as to subdivide the pressure vessel into a first filter chamber and a second filter chamber, each containing a number of the filter assemblies. A flow diverter is deployed in the central flow path for diverting a flow of filtered liquid passing along the central flow path from the first filter chamber so as to flow outwards from the central flow path to undergo a second filtering in the second filter chamber. Also disclosed is an outlet flow throttling arrangement to avoid overload of a backwash cleaning system.
B01D 33/21 - Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
B01D 33/23 - Construction of discs or component sectors thereof
B01D 33/48 - Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
4.
Duct for use in a system for separating particles suspended in a fluid, and a method of designing such duct
A duct for use in a system for separating particles suspended in a fluid and a method for designing such duct. The duct comprises at least one trapping-bay portion having a main channel extending along a curved central line defining a fluid flow direction and trapping bay(s) for trapping at least a part of the particles and coextensive with the channel along the line. The channel and the bay(s) are as follows in a cross-section of the trapping-bay portion taken perpendicularly to the line: the channel has a basic polygonal shape defined by at least four channel walls including outer, inner, upper and lower channel walls; and the bay protrudes from the inner and/or outer channel walls away from the line and has bay walls generally parallel to the corresponding walls of the channel oriented in the same way, the area of the bay smaller than that of the channel.
A filter for filtering a flow of liquid a filter assembly with a number of filter disks coaxially arrayed along a central flow path within a pressure vessel. Each filter disk has a number of segments. The segments are preferably implemented as spacers with outward-facing filler screen support configurations supporting first and second filter screens. The filter screen support configurations have a cellular form that is open over a majority of a surface area, An arrangement of support ribs are deployed to maintain a spacing between the first and second filter screen support configurations. At least 80 percent of an internal volume of each of the segments is preferably open to allow liquid flow from the screens to the central flow path. Also disclosed are modular structure's of the filter disks, and a backwash arrangement which performs a spiral scanning motion across the surface of each filter disk.
B01D 33/50 - Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
B01D 33/39 - Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection concentrically or coaxially
B01D 33/15 - Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
B01D 33/23 - Construction of discs or component sectors thereof
B01D 33/21 - Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
A filter for filtering a flow of liquid a filter assembly with a number of filter disks coaxial!y arrayed along a central flow path within a pressure vessel. Each filter disk has a number of segments. The segments are preferably implemented as spacers with outward- facing filler screen support configurations supporting first and second filter screens. The filter screen support configurations have a cellular form that is open over a majority of a surface area, An arrangement of support ribs are deployed to maintain a spacing between the first and second filter screen support configurations. At least 80 percent of an internal volume of each of the segments is preferably open to allow liquid flow from the screens to the central flow path. Also disclosed are modular structure's of the filter disks, and a backwash arrangement which performs a spiral scanning motion across the surface of each filter disk.
B01D 33/23 - Construction of discs or component sectors thereof
B01D 33/50 - Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
B01D 25/02 - Filters formed by clamping together several filtering elements or parts of such elements in which the elements are pre-formed independent filtering units, e.g. modular systems
patents
