The invention relates to a gas-heated infrared radiation emitter comprising at least one radiating screen (12), which is for example made of ceramic and/or metal, taking the form of at least one plate (14) comprising: - a lower main surface and an upper main surface that are distant from each other, and - a plurality of through-prisms (16), which are preferably hollow, extending from the lower main surface to the upper main surface, each prism being defined by a polygonal base and by an axis. The prisms (16) are juxtaposed with one another so that their polygonal bases form a tiling of at least one portion of the lower and upper main surfaces of said plate.
The invention relates to a gas-heated infrared radiation emitter (1), comprising a burner plate (8) the burner plate serving as a combustion surface, and a radiating screen (12) positioned on the side of the combustion surface of the burner plate. The radiating screen (12) is formed by a mesh material or material with open pores, and has an inner face oriented towards the combustion surface side of the burner plate. The inner surface of the screen comprises at least a first portion (16) and a second portion (18) offset from one another in relation to the combustion surface, such that the distance between the combustion surface and the first portion (16) is less than the distance between the combustion surface and the second portion (18).
F24C 3/06 - Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate without any visible flame
F23D 14/14 - Radiant burners using screens or perforated plates
A ceramic reflector (100) for at least one IR lamp comprises at least one elongated concave reflector body (102). Each of the at least one elongated concave reflector bodies comprises an elongated bottom section and two elongated upstanding walls. Each of the elongated concave reflector bodies is provided for containing at least one IR lamp (150) and for reflecting the IR light from the at least one IR lamp. Each elongated concave reflector body has in each cross section at both of its upstanding walls a wall height. The wall height is the vertical distance between the deepest level of the bottom section of the reflector body and the highest level of the upstanding wall. At one or at both longitudinal ends of at least one reflector body; the wall height is at both upstanding walls larger than in the middle section of the elongated concave reflector body.
A gas fired radiant emitter comprises a burner deck onto which premix gas is combusted when the emitter is in use; and a metal plate provided at the combustion side of the burner deck. The metal plate is provided to act as radiant screen when the emitter is in use. The metal plate is at least over part of its surface spaced from the burner deck. The metal plate comprises a plurality of elongated slots for passage through the metal plate of flue gas generated on the burner deck. The plurality of elongated slots comprise a first elongated slot. The first elongated slot has a first tangent along a position along the length of the first elongated slot. The plurality of elongated slots comprise a second elongated slot. The second elongated slot has a second tangent along a position along the length of the second elongated slot. The angle between the first tangent and the second tangent is between 45° and 135°.
F23D 14/14 - Radiant burners using screens or perforated plates
F26B 13/10 - Arrangements for feeding, heating or supporting materialsControlling movement, tension or position of materials
F26B 3/30 - Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
F23D 14/02 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
5.
Convective hood for heat treatment of a continuous strip
A convective hood for transverse installation in a system for continuous heat treatment of moving strip material comprises blowing nozzles for blowing hot gas against the moving strip in an arrangement transverse to the direction of movement of the strip material; and a first transverse suction zone for the suction of hot gas. The first transverse suction zone comprises a first transverse section and a second transverse section. The first transverse section and the second transverse section are provided at the same side downstream or upstream of the movement of the strip material from the blowing nozzles when the convective hood is installed in a system for continuous heat treatment of moving strip material. The second transverse section is provided along the line for movement of the continuous strip material between the first transverse section and the blowing nozzles. The first transverse section comprises suction openings for suction of hot gas directly from outside the convective hood into the convective hood; the suction openings being in closed gas flow connection to a first manifold for recirculation of at least part of this hot gas to the blowing nozzles for blowing the hot gas onto the continuous strip material. The second transverse section comprises suction openings for suction of hot gas directly from outside the convective hood into the convective hood; the suction openings being in closed gas flow connection to a second manifold for exhausting 100% of this hot gas outside of the convective hood.
F26B 3/28 - Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
F26B 3/30 - Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
F26B 21/00 - Arrangements for supplying or controlling air or gases for drying solid materials or objects
A ceramic reflector (100) for at least one IR lamp comprises at least one elongated concave reflector body (102). Each of the at least one elongated concave reflector bodies comprises an elongated bottom section and two elongated upstanding walls. Each of the elongated concave reflector bodies is provided for containing at least one IR lamp (150) and for reflecting the IR light from the at least one IR lamp. Each elongated concave reflector body has in each cross section at both of its upstanding walls a wall height. The wall height is the vertical distance between the deepest level of the bottom section of the reflector body and the highest level of the upstanding wall. At one or at both longitudinal ends of at least one reflector body; the wall height is at both upstanding walls larger than in the middle section of the elongated concave reflector body.
A convective hood for transverse installation in a system for continuous heat treatment of moving strip material comprises blowing nozzles for blowing hot gas against the moving strip in an arrangement transverse to the direction of movement of the strip material; and a first transverse suction zone for the suction of hot gas. The first transverse suction zone comprises a first transverse section and a second transverse section. The first transverse section and the second transverse section are provided at the same side downstream or upstream of the movement of the strip material from the blowing nozzles when the convective hood is installed in a system for continuous heat treatment of moving strip material. The second transverse section is provided along the line for movement of the continuous strip material between the first transverse section and the blowing nozzles. The first transverse section comprises suction openings for suction of hot gas directly from outside the convective hood into the convective hood; the suction openings being in closed gas flow connection to a first manifold for recirculation of at least part of this hot gas to the blowing nozzles for blowing the hot gas onto the continuous strip material. The second transverse section comprises suction openings for suction of hot gas directly from outside the convective hood into the convective hood; the suction openings being in closed gas flow connection to a second manifold for exhausting 100% of this hot gas outside of the convective hood.
A drier installation for continuous drying moving strip material comprises a first transverse convective drying system; and a second transverse convective drying system installed in downstream movement direction of the strip material from the first transverse convective drying system. The first transverse convective drying system comprises first suction nozzles for the suction of hot gas from at the moving strip material into a first suction duct; one or more than one first blowing nozzles for blowing at least part of the sucked hot gas from a first blowing duct back onto the moving strip material; and a first fan provided in gas flow connection between the first suction duct and the first blowing duct for sucking hot gas by the first suction nozzles and for blowing the hot gas by the one or more than one first blowing nozzles. The second transverse convective drying system comprises second suction nozzles for the suction of hot gas from at the moving strip material into a second suction duct; one or more than one second blowing nozzles for blowing at least part of the sucked hot gas from a second blowing duct back onto the moving strip material; and a second fan in gas flow connection between the second suction duct and the second blowing duct for sucking hot gas by the second suction nozzles and for blowing the hot gas by the one or more than one second blowing nozzles. At least one transverse row of gas fired radiation emitters is installed along the line of movement of the strip material between the first and the second transverse convective drying system. Ducting is provided connecting the second transverse convective drying system to the first transverse convective drying system to enable part of the hot gas to flow from the second suction duct to the first blowing duct in order to be blown by the first blowing nozzles onto the moving strip material.
F26B 3/04 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over, or surrounding, the materials or objects to be dried
F26B 3/30 - Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
F26B 13/00 - Machines or apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
F26B 21/04 - Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
Gas fired radiant emitter having a premixing chamber for preparing a premix of gas and air; a perforated ceramic plate acting as burner deck; and a pilot burner having a premix gas supply flow tube and two electrodes. The premix gas supply flow tube of the pilot burner extends from the side of the perforated ceramic plate where the premixing chamber is located, into a through hole in the perforated ceramic plate. The premix gas supply flow tube has a gas exit in the through hole in the perforated ceramic plate or at the combustion side of the perforated ceramic plate. The gas fired radiant emitter has features so that in an area of the perforated ceramic plate around where the premix gas supply flow tube extends into a through hole in the perforated ceramic plate, no premix gas flows through the perforated ceramic plate.
A nozzlebox for blowing hot gas in the convective drying zone of equipment for the continuous drying of air-borne paper sheets comprises at least one direct impingement nozzle for ejecting a jet of hot gas perpendicular to the average plane of the paper sheet to be dried. The nozzle box comprises a plurality of inclined jet nozzles for ejecting jets of hot gas under an inclined angle with respect to the average plane of the paper sheet to be dried. At least two inclined jet nozzles are provided for which the plane comprising the vector representations of the jet directions of the at least two inclined jet nozzles does not comprise the vector representing the jet direction of a direct impingement nozzle.
The method comprises the step of transporting the glass plate through a drying and/or curing oven. The organic coating layer is applied on the side of the glass plate comprising a non-transparent coating layer. The drying or curing oven comprises a heating system. The heating system comprises one or more radiation emitters on the side of the glass plate opposite to the side with the organic coating layer. The radiation emitters are used to heat the side of the glass plate opposite to the side with the organic coating layer in order to dry and/or cure the organic coating layer on the glass plate so as to form a dried or cured organic polymer coating layer on the glass plate.
B05D 3/02 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
C03C 17/32 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
C03C 17/36 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
C03C 17/38 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal at least one coating being a coating of an organic material
Gas fired radiant emitter(100)comprising a premixing chamber(110)for preparing a premix of gas and air; a perforated ceramic plate(120)acting as burner deck; and a pilot burner(130)comprising a premix gas supply flow tube (140)and two electrodes(160, 170). The premix gas supply flow tube (140) of the pilot burner(130) extends from the side of the perforated ceramic plate (120) where the premixing chamber(110)is located, into a through hole(180)in the perforated ceramic plate(120). The premix gas supply flow tube(140)has a gas exit in the through hole(180)in the perforated ceramic plate(120)or at the combustion side of the perforated ceramic plate(120). Means(192, 194)are provided so that in an area of the perforated ceramic plate(120)around where the premix gas supply flow tube extends(140)into athrough hole(180)in the perforated ceramic plate(120),no premix gas flows through the perforated ceramic plate(120).
A control system for control of supply of electrical power from a network (200) to various groups of impedances (212, 222) comprises a synchronisation system (17, 18) for synchronising with the cycles of an AC supply network and a programmable control unit. The programmable control unit has control tables (250). Each control table (250) corresponds with a particular percentage of maximum electrical power. Each control table has a sequence of bits (0 or 1), the percentage of 1 values corresponds to the percentage of maximum power. The programmable control unit provides digital outputs (216, 226) in the form of control tables (250) for the command of static power switches (214, 224) which control electrical power to the various groups of impedances (212, 222). The impedances (212, 222) of one group (210, 220) are connected in star and the various groups (210, 220) are connected in parallel. The control system guarantees an efficient use of the electrical power, equally distributed over the three phases with a low level of harmonics.
H02M 1/12 - Arrangements for reducing harmonics from AC input or output
G05D 23/19 - Control of temperature characterised by the use of electric means
H02M 5/257 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
The invention relates to a method for manufacturinga gas fired radiant emitter with increased emissivity. The method comprises the steps of - providing a porous ceramic burner deck, e.g. a perforated ceramic burner deck, - applying a wet coating layer on the porous ceramic burner deck, wherein the wet coating layer comprises ceramic particles and/or metallic particles that will form a coating layer with increased emissivity compared to the porous ceramic burner deck without the coating layer, - sintering and/or curing the coating layer, whereby the sintering and/or curing is performed by operating the gas fired radiant emitter in which the porous ceramic burner deck is mounted, via supplying combustible gas to the radiant emitter and igniting the combustible gas after it has flown through the porous ceramic burner deck, whereby the uncured and/or unsintered coating layer is transformed into a sintered and/or cured coating layer adhering to the porous ceramic burner deck via sintered and/or cured bonds.
The invention discloses a continuous curing or drying installation for coated sheet metal strip. The installation comprises a continuous curing or drying oven, and downstream of it a cooling system. The cooling system comprises a number of consecutive cooling chambers along the direction of movement of the sheet metal strip. The cooling system comprises at least one fan. At least one of said at least one fans is provided for extracting air from in one cooling chamber, preferably from at the sheet metal strip, and for blowing the extracted air back onto the sheet metal strip in another cooling chamber than where the air has been extracted.
C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
C21D 9/573 - Continuous furnaces for strip or wire with cooling
B05D 3/04 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
F26B 13/00 - Machines or apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
F27D 9/00 - Cooling of furnaces or of charges therein
A cooling system is described for the continuous cooling of sheet metal strip. The cooling system is installed downstream of a continuous oven which is drying a coating applied to the sheet metal. The cooling system is provided with means for blowing cooling air onto the sheet metal strip. The cooling system comprises -for at least part of the means for blowing cooling air onto the sheet metal strip - means for increasing the temperature of the cooling air prior to blowing the cooling air onto the sheet metal. A method is disclosed for using such cooling systems, e.g. for cooling coatings comprising magnesium oxide that are applied on grain-oriented electrical steel.
C21D 1/70 - Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
C21D 8/12 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
C21D 9/573 - Continuous furnaces for strip or wire with cooling
F27B 9/30 - Details, accessories or equipment specially adapted for furnaces of these types
F27D 9/00 - Cooling of furnaces or of charges therein
F27D 17/00 - Arrangements for using waste heatArrangements for using, or disposing of, waste gases
The present invention relates to a gas fired infrared radiation emitter comprising a burner plate (140) acting as combustion surface and a radiant screen (160) positioned at the combustion side of the perforated tiles. The radiant screen is embossed (180) proving locally different distances between th burner plate and the radiant screen. The result is a higher performance of the gas fired infrared radiation emitter.
A radiant burner (1) comprises a body (2) defining a premixing space (9) and a combustion space (10), the premixing space being separated from the combustion space by a radiant burner element (5) having its burner part (11) at the side of the combustion space, wherein the burner part's emissivity and/or conductivity and/or temperature resistance is not equal at each location of it while the gas permeability is substantially equal at each location of it. At least one location has a different value of emissivity and/or conductivity and/or temperature resistance than the radiant burner element base material.
A drying installation (1)and method for drying of products (3). More in particular, the invention relates to a drying installation (1) and a method for drying sludge or mud, as e.g. the drying of wastewater and industrial sludge possibly contaminated with toxic or corrosive components.The dryer installation (1) comprises infrared emitters (5) which are protected and/or insulated from the evaporation products (7) exiting the drying product (3).
F26B 3/30 - Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
F26B 23/02 - Heating arrangements using combustion heating
A radiant burner (1) which comprises at least one radiant burner plate (2) and at least two layers of radiant screens (3) enclosed by a peripheral band (4) associated with a body (6) defining a premixing chamber for said burner. The peripheral band (4) comprises an upper flange (5). The radiant burner further comprises an insulation (7) lying under and extending downwardly from said upper flange of said peripheral band. The insulation (7) has an internal peripheral structure permitting limited movement of the layers of radiant screens (3). The insulation is a multilayer structure wherein each insulation layer engages and supports at least one screenlayer (3).
A radiant burner comprises a body defining a premixing chamber and a combustion chamber. The premixing chamber is separated from the combustion chamber by at least one radiant burner plate (2) which has multiple levels of burner surface. The combustion chamber is further limited by a first radiant screen (4). The radiant burner further comprises a second radiant screen (3) in the combustion chamber. The second radiant screen is spaced from, but near and parallel to the radiant burner plate(s), such that this second radiant screen acts as an extended burner surface and also heats up said at least one radiant burner plate when in use.
A drier installation (1) for drying web (2), more particularly paper, which installation is provided for drying a maximum web width, the installation (1) comprises gas-heated radiant elements (3) for radiating the web, arranged according to at least one row (4) stretching out in the transversal (5) direction over the substantially entire maximum web width. The installation (1) comprises at least a transversal convective system (7, 36) equipped with suction and blowing devices (8) for sucking at least part of the combustion products produced by the radiant elements (3) by means of a suction duct (13) and for blowing this pa o the combustion products towards the web (2) by means of a blowing duct (14). Both suction (13) and blowing (14) ducts stretch out in the transversal (5) direction of the web (2). The convective system (7, 36 comprising at least a mixing device (12, 22, 28, 37, 46) installed opposite of the passing web (2) in relation to corresponding suction (13) and blowing (14) ducts and arranged so as to suck and/or blow the combustion products. The drier installation as subject of the present invention is characterized in that the vector average of the projections (V1, V2, V3, V5, V6, V7, V8) in a plane (P1) perpendicular to the web ( ) and stretching out in the transversal (5) direction of the web (2), has component (V4) parallel to the web (2) that is smaller than the maximum web width of the web (2), the vectors representing the respective trajectories of the different jets of sucked and/or blown combustion products.
Drying apparatus for paper and boards; gas infrared
radiation installations for drying paper and boards; burners
for gas installations; gas burners for infrared drying
installations; gas infrared drying installations for paper
and board.
INDUSTRIAL DRYING APPARATUS FOR PAPER AND BOARDS; INDUSTRIAL GAS INFRARED RADIATION INSTALLATIONS FOR DRYING PAPER AND BOARDS; INDUSTRIAL GAS BURNERS FOR GAS INSTALLATIONS; INDUSTRIAL GAS BURNERS FOR INFRARED DRYING INSTALLATIONS; INDUSTRIAL GAS INFRARED DRYING INSTALLATIONS FOR PAPER AND BOARD
Heating and cooking apparatus, in particular fitted with
infra-red burners, intended for industry, heating large and
other premises of all kinds, cooking and communal and
household purposes of all kinds, burners, infra-red burners
themselves.
