Abstract: Air filters comprising thin-walled textile filter bodies have to be cleaned periodically. According to a method known to this purpose, the filtered material is loosened using pressure pulses in a flushing air flow. According to the invention, for generating the pressure pulses a plurality of small, quick-acting valves are in each case briefly opened, the opening moments being adapted to one another in such a way that partial pulses released thereby arrive simultaneously at the inlet of a flushing line common thereto.

Abstract: A bag house air filtration system with minimal recirculation uses new inlet airflow patterns and cleaning processes. Inlet air enters the bag house. An input plenum changes the velocity profile. Dirty inlet air is split into two plenums, and then passed through guide vanes. A clean air plenum contains a series of individual compartments with a pre-set number of filter bags that are effectively cleaned during a single cleaning cycle. Each individual compartment has a door or louver mounted above the bag openings that is opened and closed during the cleaning cycle. An automatic control system continuously senses bag house pressure drop and activates the cycle when needed. The doors open and close in a pre-set pattern to drop the dust cakes from the bags and restore air flow to normal pressures. Closing a door mounted above the bags creates a reversal of pressure that removes the dust cake.

Abstract: According to an exemplary embodiment of the present disclosure, a system for removing matter from a filtering device of a work machine includes a gas pressurization assembly. An element of the gas pressurization assembly is removably attachable to a first orifice of the filtering device without removing the filtering device from a work machine to which the filtering device is connected. The system also includes a heat source fluidly connected to the gas pressurization assembly.

Abstract: A self cleaning gas filtration system for filtering contaminants from a flow of gas. A filter element is disposed within a housing and configured to receive a first flow of gas from an inlet in the housing. A pressurized gas source is fluidly coupled to at least one tube having a plurality of perforations. The perforations are configured to backflush the filter with a second flow of gas from the gas source. An outlet is configured to receive at least a portion of the second flow of gas.

Abstract: According to an exemplary embodiment of the present disclosure, a system for removing matter from a filtering device includes a gas pressurization assembly. An element of the assembly is removably attachable to a first orifice of the filtering device. The system also includes a vacuum source fluidly connected to a second orifice of the filtering device.

Abstract: A cone (36) and a ring (38) are accessories separately used during respective phases of cleaning a diesel particulate filter (10, 10?) in a cleaning machine that uses compressed air pulses to clean the substrate (12) where particulate matter in engine exhaust has been trapped. In one phase the ring covers the outer perimeter margin of one end face of the substrate, and in the other phase the cone covers a central inner zone of the end face.

Abstract: A filter apparatus includes a gas-impermeable outer conduit having an open end and a closed end. The interior of the outer conduit is axially divided into first and second sides. A first clean and first dirty flow path are defined within the first side. A first gas-permeable liner separates the first clean flow path from the first dirty flow path and from the open end. A second clean and second dirty flow path, are defined within the second side. A second gas-permeable liner separates the second clean flow path from the second dirty flow paths and from the open end. A control valve connects one of the first clean and second clean flow paths to an exhaust conduit, and connects the other clean flow path to a selectively pulsed supply of cleaning gas.

Abstract: A method of declogging at least one filter of a plant for manufacturing uranium oxide from uranium hexafluoride, including separating, from the wall of the filter, uranium oxyfluoride particles deposited, by a stream of inert gas such as nitrogen, injected into the filter, in a counter-currentwise direction to the flow of hydrofluoric acid.

Abstract: The present disclosure relates to a pulse cleaner for cleaning a diesel exhaust treatment device. The pulse cleaner includes a cabinet, a diesel exhaust treatment device mount positioned within the cabinet for mounting the diesel exhaust treatment device during pulse cleaning, and a collection filter positioned within the cabinet for collecting material displaced from the diesel exhaust treatment device during cleaning. The pulse cleaner also includes a pulse generator for generating pulses that are each directed at a majority of a face of the diesel exhaust treatment device when the diesel exhaust treatment device is mounted at the diesel exhaust treatment device mount. The pulse generator includes a pressure tank for accumulating pressurized air, and a valve arrangement that flushes the pressurized air from the tank. A pulse of air for cleaning the diesel exhaust treatment device is generated each time the tank is flushed.

Abstract: A system for removing matter from a filtering device includes a flow receiving device having a plurality of blocking portions. Each of the plurality of blocking portions is configured to substantially block a flow directed by a corresponding at least one of a plurality of filter passages of the filtering device. The system further includes a positioning assembly configured to assist in positioning the flow receiving device within the filtering device and relative to a filter media of the filtering device.

Abstract: The invention is an apparatus for cleaning one or more cylindrical filters. An enclosure contains the entire apparatus in which each filter is supported on its own pair of rotating horizontal rollers. An assembly of air nozzles adjacent to a first end of each rotating filter is moved radially across the filter end to blow the particles out of the filter and into a particle collector at the second end. A second assembly of air nozzles at the second end then operates in a similar manner. The positions of the air nozzles are manually adjusted for filters of differing length. A simpler unit has only one assembly of air nozzles, but requires manually reversing the position of the filter for the second operation.

Abstract: According to an exemplary embodiment of the present disclosure, a method of detecting matter within a filtering device includes measuring a metric indicative of a first quantity of matter within the filtering device and removing a portion of the matter from the filtering device. The method also includes measuring a metric indicative of a second quantity of matter remaining within the filtering device.

Abstract: A filter regeneration apparatus of a coal gasification system having a filter for capturing char (unburned matter) present in exhaust gas at an exhaust gas passage communicating with exhaust gas source including a coal gasification furnace, fills the filter container with inactive gas having oxygen concentration of less than 5 vol. % and heat the filter to a target temperature of 400 to 450° C. and feed ashing gas having oxygen concentration of 5 to 15 vol. %, thereby ashing char in the filter. This method and apparatus achieve ashing of char in a safe manner and shortens the time of regenerating the filter by controlling the oxygen concentration in the ashing gas and the filter temperature constantly to reach preset target values.

Abstract: An air cleaner includes a housing with a dirty air inlet, a clean air outlet, and an interior. A tubesheet is in the housing interior having a plurality of openings. A panel-style filter arrangement is oriented such that each one of the openings in the tubesheet is covered by the panel-style filter arrangement. A plurality of blowpipes are provided. Each blowpipe is oriented to direct a fluid pulse at a respective one of the openings in the tubesheet covered by the panel-style filter arrangement. An accumulator arrangement is oriented adjacent to the openings in the tubesheet on a downstream side of the tubesheet. The accumulator arrangement includes, for each opening in the tubesheet, a first and second plate adjacent to opposite ends of the tubesheet opening. Adjacent openings in the tubesheet share a same first or second plate.

Abstract: A method of pulse cleaning filter media in panel, cylindrical, conical, or V-pack style filter in an opening of a tubesheet is provided. The method includes directing a fluid pulse at the filter media at an angle that is: (i) not normal to a plane of the opening of the tubesheet; and (ii) not in line with the general direction of the filtration flow through the filter media. An air cleaner is provided including a housing including a dirty air inlet, a clean air outlet, and an interior. A tubesheet is in the housing interior having a plurality of openings. In the plurality of openings of the tubesheet are mounted filters with filter media. There is a plurality of blow pipes, with each blow pipe being pointed to direct at a fluid pulse a respective one of the filters at an angle that is: (i) not normal to a plane of the opening in the tubesheet; and (ii) not in line with the general direction of filtration flow through the respective filter media.

Abstract: An air cleaner is provided including a housing having a dirty air inlet, a clean air outlet, and an interior. A tubesheet is in the housing interior and has a plurality of openings. The tubesheet is oriented in one of either a generally horizontal or a generally vertical position. A plurality of panel-style filters is provided, with each filter being mounted in a respective one of the openings in the tubesheet. The air cleaner also has a plurality of blowpipes, with each blowpipe being oriented to direct a fluid pulse at a respective one of the panel-style filters at an angle that is: (i) not normal to a plane of the openings in the tubesheets; and (ii) not in line with a general direction of filtration flow through the respective panel-style filter. A method of pulse cleaning panel-style filters oriented in openings of a tubesheet is provided.

Abstract: A method of cleaning a filter element includes directing a jet of pressurized gas from a nozzle onto a filter element, with the jet having a non-round cross-sectional shape that is a same general cross-sectional shape as the opening in a tube sheet holding the filter element. The nozzle has a channel for the pressurized gas that is obstruction-free. A method of designing a nozzle arrangement for directing a jet of pressurized gas onto a filter element includes designing a nozzle arrangement to generate a jet of pressurized gas having a non-round cross-sectional shape that is a same general shape as a non-round shape of an aperture in a tubesheet holding the filter element. The nozzle arrangement includes at least one nozzle, each nozzle has an unobstructed flow channel, and each nozzle is cylindrical in shape and has at least one open slot. A pressurized gas generator includes a compressed air manifold storing pressurized gas, a valve in fluid communication with the manifold, and a nozzle arrangement.

Abstract: A method for cleaning a filter apparatus of a rock drilling rig, a filter apparatus and a rock drilling rig. The filter apparatus comprises several filter units, and the filters therein separate solid matter from the filtering flow. The filter apparatus comprises a cleaning apparatus with a pressure channel enabling to provide the filter unit to be cleaned with a pressure pulse. The cleaning apparatus also comprises mechanical sealing means for preventing the filtering flow through the filter unit to be cleaned during cleaning.

Abstract: Multiple storage tanks and multiple valves that open simultaneously allow gas charges stored at superatmospheric pressure in the tanks to simultaneously discharge and form a single substantial percussion pulse that dislodges particulate matter from a diesel particulate filter.

Abstract: A Vacuum conveyor device (10) with a multi-stage filter system, has at least one inner filter (10A), one outer filter (10B), and one filter adapter (20) especially for air-tight and/or fluid-tight insertion of at least one of the filters, for which the outer filter is arranged up-stream of the inner filter. In order of preparing a filter system for a vacuum conveyor device, which features both the cleaning-related elements of conventional filters and also the safety-related advantages of multi-stage systems, but which remains compact in structure, the one or more inner filters (10A) are used as carrier units for the one or more outer filters (10B) that can be mounted on or inserted into these inner filters and can be connected or are connected to the filter adapters (20).

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: A cleaning system for a gas turbine inlet filter mounted to a tubesheet. The filter defines an upstream side at which particulates are separated from a fluid stream passing through the filter and a downstream side substantially free of the particulates. The cleaning system comprises a blowpipe for supplying a pressurized fluid. A one-piece nozzle is made from a tubular member having a substantially constant cross-section extending along the length of the member. The nozzle is permanently attached to the blowpipe at a first end portion. The nozzle is in fluid communication with the blowpipe to direct a cleaning pulse of the pressurized fluid from a second opposite end portion into the downstream side of the filter to dislodge particulates into the upstream side. An aspirator is formed in the nozzle at an upstream location spaced from the second end portion of the nozzle.

Abstract: A filter cleaning system for use with a fabric filter mounted in a housing and defining an upstream side at which particulates are separated from a fluid stream passing through the filter and collected. The fabric filter also has a downstream side that is substantially free of the particulates. The filter cleaning system comprises a blowpipe for supplying a pressurized fluid. A one-piece nozzle is made from a tubular member having a substantially constant cross-section extending along the length of the member. The nozzle is attached to the blowpipe at a first end portion. The nozzle is in fluid communication with the blowpipe to direct a portion of the pressurized fluid from a second opposite end portion into the downstream side of the filter to dislodge particulates from the upstream side. An aspirator is located upstream and spaced from the second end portion of the nozzle.

Abstract: The invention relates to a method for cleaning filters for dust-laden waste gases, including several filter elements (2) which are arranged vertically in a filter housing (1) and which have an upper open end (16) and a lower closed end (15) with at least one feed line (9) for the dust-laden waste gases and at least one discharge line (11) for the cleaned waste gases, in addition to a device for injecting surges of compressed air into the open end (16) of the filter elements (2). In order to reduce pressure fluctuations in the filter and to provide efficient cleaning with pulsations of compressed air in the low pressure range i.e. from approximately 0.8 to 3 bars, the filter is divided into several filter modules (1) respectively including at least one filter element (2). At least two filter modules (1) are arranged in a filter housing (10) or a filter chamber.

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: A projector and a dust detection device for an air filter thereof. The projector comprises a lamp, a fan, an filter, and a dust detection device. The lamp comprises a housing with an inlet and an exit. The fan is disposed in front of the inlet of the housing, and generates airflow to dissipate heat produced by the lamp. The air filter is disposed in front of the exit of the housing, and filters the airflow passing around the lamp. The dust detection device is disposed behind the air filter, and detects the state of the filtered airflow.

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 filter assembly having a plurality, preferably at least substantially vertically mounted, longitudinal elongated filter elements that are suitable for separating fluid from solid particles, having an open upper end sealed into a sealing device and a closed bottom end attached to a filter support that is mounted on a filter grid, in which the filter grid has a plurality of grid elements together forming a grid, wherein at least a portion of the cross-section of the grid elements between two adjacent filter elements is pointiform. The invention further pertains to a filter grid and a filter vessel containing at least one filter assembly.

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: An improved cartridge, typically in cylindrical or panel form that can be used in a dry or wet/dry vacuum cleaner. The cartridge is cleanable using a stream of service water, or by rapping on a solid object, or by using a compressed gas stream, but can provide exceptional filtering properties even for submicron particulate in the household or industrial environment. The cartridge has a combination of nanofiber filtration layer on a substrate. The nanofiber and substrate are engineered to obtain a maximum efficiency at reasonable pressure drop and permeability. The improved cartridge constitutes at least a substrate material and at least a layer including a non-woven, fine fiber separation layer.

Abstract: In order to provide a device for producing a pulsating fluid stream, which is of simple construction and is easily producible and which enables a pulsating fluid stream to be produced at a comparatively high frequency, there is proposed a device for producing a pulsating fluid stream which comprises a fluid inlet, a fluid outlet and a blocking element that is arranged between the fluid inlet and the fluid outlet and is rotatable about a rotational axis, wherein the blocking element comprises a blocking member which cyclically closes and opens a fluid passage from the fluid inlet to the fluid outlet.

Abstract: A paper trap includes a trap chamber. An outlet of the trap chamber is preferably connected to an inlet of the exhaust bypass damper. An inlet of the trap chamber is coupled to dust capture hoods and an outlet of the bypass chamber is coupled to a dust collector. A perforated plate is disposed in the trap chamber to prevent scraps of paper from passing through the paper trap. The paper trap includes a normal operating position and a cleaning position. In a normal operating position, air from the dust capture hoods flows through the paper trap. In a cleaning position, a paper disposal opening is uncovered to remove scraps of paper from the perforated plate. A junction between the trap chamber and bypass chamber is covered and a bypass inlet uncovered. Air flows into the bypass inlet and out-of-the outlet of the bypass chamber.

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 V-pack filter includes a frame construction having a first frame structure and a second frame structure. The V-pack filter also includes first and second panel sections mounted in extension between the first and second frame structures. The first panel section has first and second ends. The second panel section has third and fourth ends. The first and third ends have a first distance therebetween while the second and fourth ends have a second distance therebetween. The second distance is generally greater than the first distance. The first and second panel sections and the second frame structure define an air flow aperture. A seal arrangement circumscribes the air flow aperture and projects outwardly from the second frame structure. The first frame structure defines a first receiver indent. Assemblies and methods are also included.

Abstract: An arrangement used for filtering out conveying air when supplying fiber material to a processing machine is provided. The arrangement has an essentially vertical filling chute for the fiber material, the chute having an upper intake opening and a lower exit opening, a device with pneumatic fiber feed at the upper intake opening, and a floccule-forming device at the lower exit opening including a system of draw-in rolls and a fast-rotating opening roll. The chute includes at least one air-permeable surface for separating the fiber material from the conveying air. An evacuating device evacuates the filtered out conveying air. An exhaust air device is coupled to the evacuating device and has an air stream regulator which is connected to a control and regulating device. The conveying air stream is guided along the opening roll, and a partial air stream of the filtered out conveying air is guided into the exhaust air device.

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: In a cleaning arrangement for a filter element disposed in a gas flow channel and including a plurality of filter pockets, a flow blocking element arranged adjacent the filter element at the downstream side thereof and having openings movable with the flow blocking element into alignment with the various filter pockets for controlling a back-flushing gas flow through the filter element, the blocking element is an elastic thin-walled structure provided with at least one opening of a shape corresponding in cross-section to the filter pocket openings and means are provided for generating in the area downstream of the blocking element a gas pressure for back-flushing the filter element pockets in succession as the blocking element with the at least one opening is moved across the filter element.

Abstract: An apparatus and method for removing particulate from a particulate-laden gas stream are disclosed. The apparatus and method include a reverse-flow process for cleaning filter bags with a cleaning gas stream. The process includes: flowing a particulate-laden gas stream to one side of the filter bags; stopping the particulate-laden gas stream to at least one filter bag; popping the filter bag with a reverse-flow of a cleaning gas stream to remove dust from the bag; and finally re-introducing the particulate-laden gas stream to the recently cleaned filter bag at a low velocity/flow rate to prevent small particles from blowing through the recently cleaned filter bag. The apparatus and method allow the particulate-laden gas stream and cleaning gas stream to be controlled independently.

Abstract: The invention is a method of monitoring a filter for absorbing paint particles produced during spray painting with a spray gun in a paint spray booth coupled to an exhaust pump, the method includes the steps of: 1) installing a filter between the booth and exhaust pump; 2) determining the initial pressure drop across a filter prior to use of the spray booth; 3) determining the maximum allowable pressure drop for the filter prior to the requirement that spraying activities must be terminated by adding the initial pressure drop of the filter to the maximum allowable increase in pressure drop across the filter before the of spraying activities must be terminated; 4) providing a warning when a first portion of the maximum allowable pressure drop is reached; and 5) preventing the use of the spray gun when a second portion, greater than the first portion, of the maximum allowable pressure drop is reached.

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: Methods for cleaning air intake for a gas turbine system include utilizing filter arrangements that include a barrier media, usually pleated, treated with a deposit of fine fibers. The media is particularly advantageous in high operating temperature (140 to 350° F.) and/or high humidity (greater than 50 to 90% RH) environments.

Abstract: A V-pack filter includes a frame construction having a first frame structure and a second frame structure. The V-pack filter also includes first and second panel sections mounted in extension between the first and second frame structures. The first panel section has first and second ends. The second panel section has third and fourth ends. The first and third ends have a first distance therebetween while the second and fourth ends have a second distance therebetween. The second distance is generally greater than the first distance. The first and second panel sections and the second frame structure define an air flow aperture. A seal arrangement circumscribes the air flow aperture and projects outwardly from the second frame structure. The first frame structure defines a first receiver indent. Assemblies and methods are also included.

Abstract: An apparatus and method for removing particulate from a particulate-laden gas stream are disclosed. The apparatus and method include a reverse-flow process for cleaning filter bags with a cleaning gas stream. The process includes: flowing a particulate-laden gas stream to one side of the filter bags; stopping the particulate-laden gas stream to at least one filter bag; popping the filter bag with a reverse-flow of a cleaning gas stream to remove dust from the bag; and finally re-introducing the particulate-laden gas stream to the recently cleaned filter bag at a low velocity/flow rate to prevent small particles from blowing through the recently cleaned filter bag. The apparatus and method allow the particulate-laden gas stream and cleaning gas stream to be controlled independently.

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: A V-pack filter includes a frame construction having a first frame structure and a second frame structure. The V-pack filter also includes first and second panel sections mounted in extension between the first and second frame structures. The first panel section has first and second ends. The second panel section has third and fourth ends. The first and third ends have a first distance therebetween while the second and fourth ends have a second distance therebetween. The second distance is generally greater than the first distance. The first and second panel sections and the second frame structure define an air flow aperture. A seal arrangement circumscribes the air flow aperture and projects outwardly from the second frame structure. The first frame structure defines a first receiver indent. Assemblies and methods are also included.

Abstract: A robotic welding station cleaning assembly (10) for removing particulates from an air-filled chamber surrounding a welding robot (12). A frame (14) is positioned about the robot (12) and includes a top (20) defining an opening (26) therein. A shield (28) is supported by the frame (14) to define the robot chamber. A spark arrestor (48) is supported on the frame (14) for controlling sparks created by welding. A blower housing (30) having an inlet (27) is disposed immediately above and in direct fluid communication with the opening (26) to move air from the chamber to the blower housing (30). The frame (14) includes a separate support stand (32) for supporting the blower housing (30) on the top (20) of the chamber.

Abstract: A filter system and a method for cleaning a gas laden with powder particles, in particular for a powder coating apparatus. At least one filter element is arranged between a crude gas chamber and a clean gas chamber. A first gas discharge device directs a gas stream from the crude gas chamber through the filter element into the clean gas chamber. A shut-off device interrupts the first gas stream through the filter element, and a second or cleaning gas discharge device directs a cleaning gas stream through the filter element into the crude gas chamber. A vibration device vibrates and/or shakes the filter element to dislodge powder from the filter element.

Abstract: When cleaning a barrier filter, comprising a plurality of filter elements, of woven fabric of felt, arranged to separate particles out of a polluted gas, the filter elements are cleaned, separately or in groups, by pressurized air pulses, the frequency, the maximum pressure and the duration of which are varied in order to minimize, by an adjustment, the total emission of dust. The frequency and/or the maximum pressure and/or the duration of the cleaning pulses are varied for a group or a plurality of groups of filter elements. After each cleaning pulse, the maximum value for the instantaneous emission of dust, the emission peak, is determined and the emission peak is used, after cleaning a certain group of filter elements, for selecting the frequency and/or the maximum pressure and/or the duration of the cleaning pulses for this group of filter elements during continued operation.

Abstract: The filter structures commonly known as a bag house or a filter bag or an air filter with a bag construction can be made by preparing the bag assembly, either in a tubular or a bi-fold construction by placing a layer of fine fiber on the upstream surface of the filter media structure. The filter assembly includes a filter cabinet with an interior component. The filter component is suspended within the filter cabinet interior. The filter component includes a frame or support for the filter media. The frame or support holds the filter bags such that the filter bags are suspended from the frame in the cabinet interior. The intake air enters the cabinet, passes through the filter assembly and exits the cabinet. The air must pass first into the fine fiber layer, the filter media and then the exterior of the cabinet.

Abstract: In a method and apparatus for cleaning pipe-shaped filter elements arranged in a housing including a separation wall dividing the housing into a clean gas space and a raw gas space into which the filter elements extend from the clean gas space through the separation wall and the raw gas is directed from the raw gas space through the filter elements into the clean gas space while dust is removed from the raw gas and collected on the filter elements, the filter elements are cleaned from time to time by supplying momentarily pressurized flushing gas to the clean air space which, at the same time, is closed to generate a flushing gas pulse providing for a backflow of clean gas from the clean gas space to the raw gas space, which dislodges dust collected on the filter elements.