Abstract: A dust collector includes a collection unit including a suction pipe and a Roots blower outwardly discharging the air having passed through the collection unit. The collection unit further includes a rotational shaft rotatably mounted in a housing of the case and disposed so as to face an interior of the case, a rotary filter mounted on the shaft and including a cylindrical porous core and a filter material attached to an outer circumference of the core and having a number of folds made of nonwoven cloth with a mesh into a continuous zigzag shape, an air blower nozzle blowing on an outer surface of the rotary filter pressure air produced by drive of the blower in a reverse direction thereby to clean the filter, and a recovery bag accommodating the dust or the like removed from the rotary filer during cleaning by the air blower nozzle.

Abstract: A process and apparatus for cleaning filter cake from the interior of a baghouse bag. A nozzle through which compressed gas flows is positioned on the interior of a bag such that gas is directed to, and thereby disrupts, the filter cake. The compressed gas flows in the same direction as a gas that is being filtered by the baghouse, thereby avoiding the effects of reverse-flow cleaning.

Abstract: A diesel particulate filter of a motor vehicle is cleaned of ash, typically using equipment already available in a service shop. The filter apparatus is disconnected from the exhaust system of a motor vehicle. The filter apparatus is reversed and reconnected to the motor vehicle's exhaust system in a configuration opposite to which the filter apparatus was originally connected. The engine is started and allowed to run at a high idle and no load engine speed to blow ash from the diesel particulate filter into the exit tubing. The ash is then collected in an ash collector.

Abstract: A method for cleaning a filter having Z-media includes providing a filter having Z-media and cleaning the media construction by directing a pulse of compressed gas into the media construction through the downstream flow face. Filter elements useable with such methods include elements made of Z-media. An example system utilizing the method includes a gas turbine air intake system.

Abstract: An apparatus and method for filtering particulate from an internal combustion engine by use of monolithic particulate trap systems having porous walls (2c, 24c). The porous walls (2c, 24c) filter the particulate. The filtered particulate on inner surfaces of the porous walls is periodically removed or regenerated via back flow of previously filtered exhaust gas. The back flow is caused by creating a pressure difference across the porous walls. The back flow of the previously filtered exhaust gas is simultaneously or sequentially coupled with high velocity through flow of exhaust gas in the channels. In addition, the particulate trap system can be an adsorber-catalyst particulate trap system for filtering particulate and reducing NOx via an adsorber-catalyst trap systems to achieve the EPA 2007 standards.

Abstract: A device and method for cleaning a filter element. The device including a valve interconnected to a blowpipe. A nozzle is positioned at an end of the blowpipe and to direct a pulse of compressed gas into the filter element. The nozzle includes a body and a diffuser arrangement configured to direct multiple jest of the compressed gas into the filter element. The valve is arranged to provide access to each of the valve components from one side of a compressed air manifold.

Abstract: A dust-removing device for the dust-collecting tank of a dust-collecting machine includes a guide frame installed inside the dust collecting tank and having a central guide rod for a brush base to move up and down thereon. The brush base has its outer circumferential edge provided with numerous brushing bristles able to reach the folded grooves in the inner wall of the dust-collecting tank. A pull unit is provided with plural pulley bases for a pull rope to pass therethrough. Two handles are respectively fixed with two lines of the pull rope exposed to the outer side of the dust-collecting tank, and the pull rope has two ends fastened with the brush base. When the two handles are moved downward alternately and repeatedly, the brush base can be moved up and down to carry out cleaning of the dust-collecting tank.

Abstract: A method of regenerating at least one diesel particle filter, in which exhaust gas is introduced through a supply line into the at least one diesel particle filter and is discharged from it through a discharge line, while heating of the exhaust gas flowing through the at least one diesel particle filter takes place, a closed circulating air circuit being created through which exhaust gas emerging from the at least one diesel particle filter may be introduced back into the latter.

Abstract: A valve and trigger cyclically connect a vacuum and a blower to a filter. The valve box has three openings, the first connectable to the vacuum, the second connectable to the blower and the third connectable to the filter. A gate inside the box, biased by the blower and the vacuum toward closing the first opening, is held against the bias by a trigger outside the box to close the second opening. The external trigger intervally operates to release the interior gate to close the first opening and open the second opening. The blower operates only if the trigger is operating. The gate is released once for approximately 1/12 of a cycle interval during each trigger operating interval. A plurality of valves can be combined in a system with one trigger for cyclically sequentially connecting a plurality of filters to the vacuum and the blower.

Abstract: A cleaning device for a bundle of tubular filter elements designed with one end open, preferably of an industrial dust filter, is proposed. Injectors for delivery of a pulse-like compressed-air jet into the filter elements are arranged above the openings of the filter elements. The compressed-air supply of the injectors, controlled via valves, takes place via a number of nozzle tubes extending at right angles to the injectors, and a number of injectors are connected in a row to each nozzle tube. Only some of the nozzle tubes are connected directly to valves and these nozzle tubes extend to a deflection, from which at least one further nozzle tube closed at its end extends in the opposite direction. The deflection is preferably at the same time a branching from which two nozzle tubes extend, which are located on the two sides of the centrally arranged nozzle tube.

Abstract: The present invention is directed to a filter cleaning device, in particular, diesel particulate filters. In one embodiment, the device comprises a source of high pressure fluid and means to transport the fluid to a nozzle or nozzles; an actuator for moving the nozzles; a controller with logic for instructing the actuator to automatically move the nozzle or nozzles across the surface of the filter; a collection device and suction device downstream of the filter; and ducting to transport the fluid between parts of the system. In one embodiment, a second collection device is used downstream of the suction device to provide additional particulate removal. There are three methods proposed for providing high pressure cleaning fluid to the filter face: 1) rotating the filter and rotating the jet about an axis outside of the filter; 2) moving a nozzle in two perpendicular directions (i.e., x-y); and 3) rotating a rectangular nozzle about the central axis of the filter.

Abstract: The invention relates to a method of cleaning a particle filter (1) by means use of a fluid, whereby the filter material is alternately treated with pressure and high flow rate. By means of the above using this method, the ash is washed out of the filter material, essentially more effectively; namely, and more completely and more gently for the filter material (2) than previously possible.

Abstract: A method for avoiding the spontaneous ignition of combustible dusts in process off-gases, wherein during the process the dusts are retained, without adversely affecting the process parameters, at least one sintered filter element which is arranged in a pressure vessel and is able to withstand temperatures of up to at least 250° C. and after the process has ended the dusts are inerted by blasting oxygen-containing gas back into the pressure vessel, and to a device for carrying out the method.

Abstract: Shown is an apparatus and method for cleaning filter units of an air filtering system using a reverse flow pulse of pressurized air. The filter cleaning system includes a venturi element (36) with a narrowed throat portion (56). A blowpipe (46) is substantially axially aligned with the venturi (36) and has an outlet nozzle (50) that is flared in a substantially conical shape with an included angle that (64) that exceeds an angle at (62) at which high pressure air would ordinarily diverge from an unmodified blowpipe opening. The nozzle (50) is axially spaced from the venturi at a selected distance (70) such that a high velocity pulse of air delivered by the blowpipe (46) through the nozzle (50) is delivered to the outlet portion (58) of the venturi (36) substantially between the outlet opening (62) and the throat (56).

Abstract: Filter devices and methods for collection of carbon nanomaterials, including fullerenes, produced in gas phase reactors are provided. The filter devices provide for in situ cleaning of filters to release captured product for collection. Product can be released and removed from the reactor without disrupting continuous synthesis of carbon nanomaterials. The filter devices facilitate increased reactor operation and larger scale production of carbon nanomaterials. The filters are cleaned by application of a motive force and/or a gas flow to the filter. In a specific embodiment filters are cleaned by a reverse flow of gas pulses to the filter provided. The invention also provides reactor systems for gas phase synthesis of carbon nanomaterials that can be operated continuously employing the filter device of this invention. Preferred reactor systems are those which synthesize carbon nanomaterials by combustion.

Abstract: An air filter suitable for use on an engine is provided. The air filter includes a hollow filter body into which is positioned a filter installation unit capable of turning within the filter body and constructed to receive a filtering filter. A main air flow opening is formed in one side of the filter body, and a sub air flow opening is formed in another side of the filter body. A dust pick-up part is formed in the filter body having a dust outlet. A ventilator is provided to direct filtered air against an interior surface of a turning filtering filter, and foreign matter accumulated on an exterior surface of the filtering filter is dislodged into the dust pick-up part before being forcibly expelled through the dust outlet.

Abstract: A valve and trigger cyclically connect a vacuum and a blower to a filter. The valve box has three openings, the first connectable to the vacuum, the second connectable to the blower and the third connectable to the filter. A gate inside the box, biased by the blower and the vacuum toward closing the first opening, is held against the bias by a trigger outside the box to close the second opening. The external trigger intervally operates to release the interior gate to close the first opening and open the second opening. The blower operates only if the trigger is operating. The gate is released once for approximately {fraction (1/12)} of a cycle interval during each trigger operating interval. A plurality of valves can be combined in a system with one trigger for cyclically sequentially connecting a plurality of filters to the vacuum and the blower.

Abstract: A method of regenerating at least one diesel particle filter, in which exhaust gas is introduced through a supply line into the at least one diesel particle filter and is discharged from it through a discharge line, while heating of the exhaust gas flowing through the at least one diesel particle filter takes place, a closed circulating air circuit being created through which exhaust gas emerging from the at least one diesel particle filter may be introduced back into the latter.

Abstract: The present invention is directed to a filter cleaning device, in particular, diesel particulate filters. In one embodiment, the device comprises a source of high pressure fluid and means to transport the fluid to a nozzle or nozzles; an actuator for moving the nozzles; a controller with logic for instructing the actuator to automatically move the nozzle or nozzles across the surface of the filter; a collection device and suction device downstream of the filter; and ducting to transport the fluid between parts of the system. In one embodiment, a second collection device is used downstream of the suction device to provide additional particulate removal. There are three methods proposed for providing high pressure cleaning fluid to the filter face: 1) rotating the filter and rotating the jet about an axis outside of the filter; 2) moving a nozzle in two perpendicular directions (i.e., x-y); and 3) rotating a rectangular nozzle about the central axis of the filter.

Abstract: A filter unit (1) for filtering gas has a plurality of bag filters (10) hanging down from a suspension plate (7) dividing a housing into a lower gas inlet side (9) and an upper outlet side (8) for filtered gas. The individual bag filter (10) has an open end (11) at the suspension plate, a tubular wall (20) of a flexible filter material, and a lower end closure (23) of an impermeable material and provided with a drain (25). The end closures of the bag filters are interconnected.

Abstract: An apparatus for removing solid particles from a gas containing solid particles, comprising a filter container, a plate provided with openings across the filter container such that the plate divides the container in an upper and lower space and a number of filter elements extending under the openings, wherein a plurality of outlet conduits are present which are in fluid communication with one or more filter elements, said outlet conduits having an outlet opening which is in fluid communication with the upper space and wherein around said outlet conduit a cap is present, which cap is provided with means for supplying backflushing fluid for removing solid particles from said filter elements and wherein the volume between the cap and the outlet conduit is sufficiently large to ensure that predominately only the clean gas between cap and outlet conduit is entrained by the backflushing fluid into the filter element when removing solid particles.

Abstract: A filter vent system and method for separating entrained airborne particulate matter from the conveying fluid is disclosed, particularly as it relates to filling a storage vessel. The filter system employs a simplified, yet more efficient filter cleaning arrangement, in which the entire clean air plenum on the downstream side of a filter array of one or more filter units is periodically pulsed with a large burst or pulse of relatively high pressure air from a single source which rapidly raises the plenum pressure to, in turn, produce a temporary pulsed flow reversal in the filter units which blasts through the filter pores to displace particulate matter collected on the upstream side of all of the filter units alike thereby cleaning or re-generating the filter surfaces.

Abstract: A cartridge dust collector for maximizing the filtration of the air and removal of the pollutants and contaminants from the air stream. The cartridge dust collector including a housing having an air inlet, an air outlet, and a transverse wall. The housing further including a chamber. Conical shaped dust collector cartridges are mounted in the chamber between the air inlet and the air outlet with each dust collector cartridge in alignment with an access opening in a side wall of the housing. Provided in the housing in alignment with each access opening are spaced apart slide rails. The dust collector cartridges including a conical shaped media pack and a head plate secured to the upper end. Each head plate is carried on the slide rails, with the slide rails being spaced apart sufficiently to receive the media pack there between. Interlocking means are privide on adjacent head plates fo that the cartridges can be assembled and removed from the housing end groups, rather than individually.

Abstract: A connecting line is provided for removing water entering an air filter housing, between the air filter housing and a cooling unit. Due to the existing difference in pressure between the air filter housing and the cooling unit, water can be suctioned out of the air filter housing via the connecting line.

Abstract: A hydrocarbon scrubber comprises: a monolith; a seal disposed concentrically around an end of the monolith, wherein the seal comprises an inner surface having a diameter equal to or less than an outer diameter of the monolith, a shoulder member protruding from the seal and physically contacting at least a portion of an end face of the monolith, and a rib member disposed on an outer side of the seal and in physical contact with the shell.

Abstract: A method of using vacuum-cleaner filters includes mounting a cylindrical-shaped filter cartridge coaxially on a rotatable spindle. Then air is drawn radially through a filter material wall of the filter cartridge. Periodically, the cartridge filter on the spindle is spun to dislodge any debris entrapped in the filter material by centrifugal force. Air flow is selectively drawn or pushed radially through a filter material wall of the filter cartridge. A clutch disposed between a motor and the spindle is used to periodically spin the cartridge filter on the spindle to dislodge any debris entrapped in the filter material by centrifugal force. Preferably, a motor that can be run in either a forward direction or a reverse direction is used.

Abstract: The invention relates to a filter dedusting arrangement in a vacuum cleaner, wherein dedusting of the filter or filter-parts is effected by supplying a secondary airflow, in a known manner. The distinctive feature of the invention is that the secondary airflow through the filter for dedusting is controlled so that by utilizing differences in pressure a flap element arranged in a casing abruptly changes its position and opens and/or closes one or more openings in the casing so that the secondary airflow impinges impulsively on the surface of the filter to be dedusted. The impulsive supply of secondary air to the filter produces a much better cleaning action.

Abstract: The present invention provides an improved cold gas-dynamic spraying process utilizing a carrier gas and small-diameter particulates whereby the particulate-laden carrier gas is directed to a ceramic filter unit where the particulates are separated out and the particulate-free carrier gas is analyzed and returned to the spraying process or to other gas purification systems.

Abstract: Constantly high efficiency of a catalytic converter can only be ensured when the configuration is maintained relatively free of particulate matter. A screen is disposed on the inflow side of the catalytic converter, which continuously or discontinuously transports away the flue dust particles collected by the screen. The flue dust collected is transported by the lateral movement of the screen to one side of the catalytic converter where the collected dust is removed. Alternatively or additionally, a vacuum system may be employed to clean the screen.

Abstract: An adjustable duct assembly for the collection of fumes, dust and the like comprises two duct sections connected end to end by a duct support system comprising two elongate arms pivotally connected, the arms attached to the adjacent ends of the ducts, externally. A counterbalance arm extends from the duct support of a lower or outer duct section beyond the pivot point of the elongate arms, to counterbalance the lower or outer arms. A filter arrangement may be associated with the duct assembly, consisting of a generally planar filter element within a housing. A travelling nozzle arrangement directs a stream of air in a direction countervailing the normal flow through the filter, for backwash cleaning of the filter. First and second drives propel the nozzle simultaneously across and along the filter, to provide full backwash cleaning coverage of the filter.

Abstract: Apparatus and process for reclaiming textile fiber waste utilizes an inner perforated duct and an outer continuous duct for removing air-borne fibers from air handling systems of equipment such as cotton carding machinery. A pressure differential switch monitors the operation and when a selected pressure differential occurs, the perforated duct is purged and the collected fibers in the form of a web are drawn through a conduit and returned for further processing.

Abstract: A vehicle exhaust-gas purifier adapted for use on a testing line in a repair shop or the like is provided, wherein exhaust gases emitted from an engine of a vehicle are gathered directly from the vehicle and emitted into the environment after being purified. The vehicle exhaust-gas purifier is provided with a mechanism for preventing deterioration of catalysts used for reducing gaseous pollutants in the exhaust gases. The purifier has an exhaust-gas gathering nozzle A which is detachably connected to an exhaust pipe of an engine of a vehicle. The exhaust gases are introduced through the exhaust-gas gathering nozzle A and an inlet C into a purifier housing. Then, any carbon particles and unburned fuel mist particles are removed from the exhaust gases through a filter chamber 10, and then the major gaseous pollutants, HC, NO.sub.x, and CO, are removed from the exhaust gases through a catalyst chamber 20. The filter chamber 10 has a filter unit 11 and an electrostatic dust collecting unit 12 provided therein.

Abstract: An airborne filter system includes an array of drum filters and a frame disposed in a permanent operative position proximate the array. A plurality of longitudinal members are operatively disposed on the frame, each longitudinal member extending into the interior area of a drum filter. A suction nozzle extends from each longitudinal member to operatively communicate with the interior surface area of the drum filter for removing waste material therefrom. A drive mechanism is in operative communication with the longitudinal members to rotate each about its longitudinal axis and to reciprocally move each longitudinal member substantially along the longitudinal axis of the drum filter from which the longitudinal member extends so that a suction end of the suction nozzle is moved substantially over the inner surface of the filter. A suction source is in operative communication with each suction nozzle to apply suction to the suction nozzles so that the waste material is drawn therethrough.

Abstract: The invention relates to a filter installation having at least one filter element for the filtering of a crude gas containing impurities, in particular particulate impurities. The crude gas flow to be filtered can be supplied to the filter installation via a crude gas line and at least two filter modules, each having at least one filter element, are provided. Each filter module is fluidly connected to the crude gas line via a module crude gas line through which a part of the crude gas flow can be supplied to the respective filter module. Each module crude gas line has a blocking member through which the supply of the respective partial crude gas flow can be interrupted for the cleaning of the filter element of the respective filter module.

Abstract: An apparatus for cleaning a filter includes a support frame and a turn table for supporting the filter, wherein the turntable rotates in relation to the support frame during a filter cleaning operation. The apparatus also includes an air flow director for directing a flow of air against the filter, wherein the air flow director is fixed in relation to the support frame during the filter cleaning operation. A method of cleaning a filter is also disclosed.

Abstract: According to the invention, regeneration is performed by filtering and by regenerating simultaneously the used absorbent; two stages are carried out for the regeneration: one, which is a rough stage, is performed in the presence of a regeneration gas; the other, a free stage, is performed in the presence of a fresh regeneration gas.

Abstract: A fluid filter is provided for separating entrained particulate matter from a moving fluid stream. The fluid filter includes a filter structure for mounting the filter on a supporting surface, a plurality of nested filter frames, and a filtration medium carried by each of the filter frames. The filter structure has a fluid inlet and a fluid outlet for conveying the fluid stream therethrough. The nested filter frames are located within the filter structure in spaced-apart relation to each other. The filtration media are interposed between the fluid inlet and the fluid outer of the filter structure, and define on one side thereof an upstream filter surface and on the other side thereof a downstream filter surface.

Abstract: A novel filtering apparatus particularly adapted for a transportable, modular powder spray painting booth with backflow cleaning capability by having two sets of filters each associated with a separate output chamber such that in normal use, a vacuum draws air from the paint booth through both filters and in backflow use, the same vacuum draws air through one filter in a normal filtering manner but with the air first drawn through the other filter in a backflow manner.

Abstract: An apparatus for cleaning a generally cylindrical air filter. The apparatus includes a carriage for receiving the air filter in a generally axially vertical orientation. The carriage is selectively turned to orient the filter generally horizontally. Dirt and debris are dislodged selectively from an inside cylindrical surface and an outside cylindrical surface of the filter by a air pressure nozzle and a pneumatic hammer, respectively. A vacuum apparatus collects the dirt and debris that is dislodged from the filter.

Abstract: A bag cleaning apparatus removes caked dust from the bags of a baghouse and prevents the removed dust from being recaptured. The outlets of each bag subject to cleaning and all adjacent bags are closed during the cleaning process and for a sufficient time following the cleaning process to assure that the dislodged cake falls into the lower hopper of the baghouse. Provisions are also made to clean portions of each bag more than others, where necessary, and to vary cleaning among the bags to optimize baghouse efficiency. A reverse air flow cleaning technique is preferably employed because it provides gentler cleaning than other known bag cleaning techniques and thus increases the life of the bags.

Abstract: An improvement to self-cleaning gas filters, gas filter-separators or gas filter-coalescer devices is disclosed. The improvement reduces the waste of gas during a self-cleaning cycle, by utilizing a single cage window rather then the usual plurality of cage windows, by a series of mechanical refinements to the internal seals, by improving the manufacturing steps, and by considering gas waste if the internal elements are damaged, during the cleaning cycle, through control of the reverse cleaning gas flow based on differential pressure across the elements that are being cleaned. Some of the improvements are field retrofitable to existing devices whereas other improvements can only be made to the present art during the manufacturing phase.

Abstract: In critical filtration applications, filter cartridges are employed to replace ion exchange resin precoat filters to minimize the waste produced. The filter cartridges are backwashed with all gas and the liquid in the filter housing provides an active scouring effect as a result of the high levels of turbulence produced. The liquid, with entrained debris from the filter is minimized in volume.

Abstract: For regenerating an exhaust gas particulate collecting filter, there is provided an exhaust gas particulate purifying process in which damage to the filter caused by a thermal action can be prevented and further electric power can be saved when an electric current supply to an electric heater attached to the filter is controlled. In the filter container (4), an electric heater (21) is provided on an end surface of the filter on an upstream side with respect to a regenerating gas flow, or provided at a position close to the end surface. Also, a temperature sensor (22) for measuring a temperature of the filter is provided inside the filter or at a position close to an end surface of the filter opposite to the aforementioned end surface.

Abstract: The invention is a fluid filter and method of separating entrained particulate matter from a moving fluid stream. The fluid filter includes a filter structure for mounting the filter on a supporting surface, a plurality of nested filter frames, and a filtration medium carried by each of the filter frames. The filter structure has a fluid inlet zone and a fluid outlet zone for conveying the fluid stream therethrough. The nested filter frames are located within the filter structure in spaced-apart relation to each other. The filtration media are interposed between the fluid inlet zone and the fluid outlet zone of the filter structure, and define on one side thereof an upstream filter surface and on the other side thereof a downstream filter surface.

Abstract: A method for regenerating an activated charcoal filter for a spray paint booth exhaust which includes the following steps:a passing a first gas flow of uncontaminated inlet air through the filter;preheating the first gas flow;combining the preheated first gas flow with additional uncontaminated air to form a preheated second gas flow at a predetermined temperature for achieving substantially complete desorption of the activated charcoal filter;recirculating the preheated second gas flow through the filter for desorbing filtered contaminants into the second gas flow;conveying the second gas flow to a heat contributing heat exchanging point for further preheating;pyrolytically oxidizing the further reheated gas flow, at a preselected elevated temperature, thereby oxidizing substantially all of the suspended particles therein;passing a resulting oxidized flow, at elevated temperature, to the heat exchanging point for cooling the oxidized gas flow and contributing exchanged heat to the second gas flow to achieve

Abstract: An improvement to self-cleaning gas filters, gas filter-separators or gas filter-coalescer devices. The improvement reduces the waste of gas during a self-cleaning cycle by a series of mechanical refinements to the internal seals, by improving the manufacturing steps, and by considering gas waste if the internal elements are damaged, during the cleaning cycle, by controlling the reverse gas flow based on differential pressure across the elements that are being cleaned. Some of the improvements are field retrofitable to existing devices whereas other improvements can only be made to the present art during the manufacturing phase.

Abstract: A fabric-filter baghouse using heated, filtered exhaust gas for reverse-flow cleaning of fabric filter bags. The baghouse includes a housing having an inlet chamber and an outlet chamber therein, a number of fabric filter bags mounted between the inlet chamber and the outlet chamber and an exhaust fan for drawing a stream of gases through the baghouse. The interior of the filter bags communicate with the outlet chamber and the exterior of the filter bags are disposed in the inlet chamber. The filter bags are constructed to prevent particulate from passing from the exterior to the interior of the filter bags, while allowing the gas stream to do so. Particulate which collects on the exterior of the filter bags is removed by passing a reverse flow of gases through the filter bags. One or more rotary valves are provided to direct a reverse flow of gases to one group of filter bags at a time.

Abstract: A filtering method of flue gas of a boiler employing a filter apparatus integrated with ceramic filters and provided with a control mechanism for regenerating the ceramic filter by reverse cleaning and a detecting mechanism for detecting directly or indirectly unburnt component. Valves of a compressed gas are operated by a signal from the control mechanism when flying-over of the unburnt component is detected to thereby start at once frequent reverse cleaning wherein the compressed gas is blown into the cleaned gas spaces and thereafter the frequent reverse cleaning having a period shorter than four minutes continues until the flying-over of the unburnt component decreases to a small quantity.

Abstract: An air filter cleaning system comprises a support plate mounted on a frame with a clamping system for clamping an end face of the filter against the underside of the support plate. A supply tank can be filled with air up to a predetermined pressure. A duct communicates from the supply tank to an opening in the support plate. The valve can be opened to substantially instantaneously release the air into the interior of the filter to explode through the filter wall. A collection bag is engaged around the lip on the underside of the support plate to collect the material exploded from the filter wall.

Abstract: Apparatus and method for purging floaters in top inlet baghouse construction wherein the upper plenum of a baghouse compartment and the clean exhaust gases duct are operably connected with a purge duct, a controllable purge damper inserted therein. At termination of the usual cleaning operation, clean exhaust gases are introduced into the top plenum by opening of the controllable purge damper to purge floaters from the upper plenum and down through the bag filters and out the bottom plenum to the reverse air duct. At the termination of the floater purge cycle, the purge damper is closed and the compartment returned to on-line operation. In alternate embodiments, a bottom inlet baghouse construction is purged of floaters wherein clean exhaust gases are given entrance into the upper portion of the bag filters with a controllable purge damper interposed. One embodiment connects with the clean exhaust duct and the other embodiment opens to the filter plenum.