Pneumatic reverse flushing

A mobile dust extraction apparatus having a self cleaning filter feature has an extractor blower in fixed position; a lower storage chamber having a valved inlet at one end; an upper plenum chamber having a valved outlet at one end and a valved vent at the other, a filter between the storage and plenum...     

An improved multi-jet nozzle construction for pulse-jet dust collectors including a multi-stage blow-pipe assembly incorporating at least one selectively located internal restriction disposed in facing relation to the direction of flow of compressed cleaning gas therethrough.

A removably insertable liner of elastically deformable material sized to be disposed within and in interfacially engaged relation with the inner surface of a rigid venturi element.

In a process for separating maleic anhydride or phthalic anhydride from a gaseous mixture by absorption into an organic absorbent flowing downwardly and countercurrently to the gaseous mixture in an absorption column having at least 4 stages, the improvement is made which comprises removing heat from...     

An air filter cleaner is disclosed which is portable and which may be used on the job site for the cleaning of air filters of heavy construction equipment. The air filter cleaner is lightweight and may easily be carried or moved by a single person. The filter is comprised of a base member and an upper...     

A dust filter apparatus includes a bag chamber having a head mounted on the top thereof and a hopper connected to the bottom thereof for receiving collected dust. The head has a dirty air inlet, a plurality of walled chambers therewithin, a back flow air plenum extending through the walled chambers and...     

A lint disposal apparatus wherein lint or other combustible particulate matter entrained in a column of air moving in a duct is held by opposing forces contiguous to the radially outer surface of a rotating screen against which a flame is directed to cause the particulate matter to be ignited as it passes...     

A vacuum cleaning or loading device of the type including a means for filtering airborne fine particulate material also includes a back-up filter system for protecting the vacuum exhauster or blower. A by-pass system may preferably be used with the back-up filtration system to protect the primary filter...     

A particle laden gas stream is cleaned by passing it through an all metal fabric including a base with pile fibers connected to the base. The flowing gas forces the pile fibers to lie down upon each other to form a depth filter media adapted to entrap fine particles. This depth filter media is cleaned...     

An industrial sweeper has a filter unit in the debris hopper with the filter unit comprising rows of cartridges having pleated paper filter elements that are cyclically cleaned by reverse jet pulses of air without interrupting the filtering action by the main blower.

Solid comminuted catalytic materials are activated by passing an activating stream through a shallow deposit of such materials on a porous substrate, characterized in that the catalyst particles are in a quiescent state during contact with the activating stream.

A filtering device is disclosed for removing particulate solids from a continuously flowing gas stream and which comprises a filter chamber that contains filter bags from which filtered gas is discharged into a plurality of plenum chambers arranged in a radial pattern around the axial center line of...     

A flow-reversing, regenerative, desiccant air dryer system absorbs moisture, oil droplets, and carbon particles from the incoming air during compression in a compressed air system. Once sufficient air pressure has been attained in an air pressure reservoir, control valves direct the flow of atmospheric-pressure...     

In order to clean collected dust particles periodically from a filter, for example in a sampling line (16) for removing waste gases from a steelmaking process for analysis, the filter (17) is first pressurised on both sides and the pressure is then suddenly released on the inlet side of the filter (V8)...     

There is disclosed an air lock filter system for separating solids from gases at temperatures up to about 1200.degree. F. wherein the filter element is a rigid porous refractory tube in an air vent for a pressure vessel. The filter element is located so that gas under pressure introduced into the vessel...     

An apparatus for cleaning air charged with contaminants, especially fibers and dust, comprising a pre-separator and a dust filter arranged after the pre-separator. At least one movable suction nozzle is effective at the surface of the dust filter. The pre-separator, constructed as a body of rotation,...     

A method for adsorbing harmful substance comprising at least two adsorptive units composed of a plurality of cylindrical or bag-shaped adsorptive elements made of a cloth-like or sheet-like adsorptive material having a 0.1 m/second pressure loss of not more than 15 mm Aq/cm, said adsorptive material...     

A method and apparatus for filtering solids from a gas stream is disclosed wherein the flow of the gas stream through a filter medium is stopped after a filter cake has built up consisting of the solid particles having been filtered out of the gas stream, wherein a plurality of cleaning gas streams is...     

The filter apparatus includes a plurality of hollow filter chambers each including a filter bed whose volume greatly exceeds the volume of the granular filter material such as sand. The beds are backwashed by a steady flow of low pressure air sufficient to fluidize the beds.

An improved filter bag mounting assembly for fabric type dust collectors compositely constituted of a selectively shaped mounting and filter media supporting member adapted for removable insertion in a complementally sized receiving aperture in a tube sheet, a filter media sheathed retainer assembly...     

In a system for dust collection and filtering of particulate matter from an air stream, wherein dustladen air is passed through a plurality of bags constructed from suitable effective filtering material so as to collect dust and particulate matter along an internal confined surface of the bag while permitting...     

A gas transport system for powder has a delivery pipe having an end portion of porous material having a pore size smaller than the particles of the powder. The porous end portion is surrounded by a jacket in which a vacuum is drawn to draw off transport gas and reduce filter capacity which would otherwise...     

A system for producing a reverse blast of air to dislodge from an air-filter element contaminents that are captured on the surface of the element in response to forward flow through the element. A manifold pipe spanning one or more openings at the outlet end of the filter elements and a nozzle supported...     

Prior to initiating cleaning of the filter assemblies with high pressure air, process gas flow is restricted, as with a flow control valve, to establish a pressure drop across the baghouse in the range 1/4 to 1/2 inches water gauge.

A filtering arrangement for vacuum loaders, particularly for conveying pulverous materials. The upper part of a filtering container is provided with a cylindrical conveying filter for conveying air withdrawn from the filtering container radially through the conveying filter. A scavenging air filter,...     

A quick-connect-and-disconnect assembly is illustrated in a bag filter environment. The assembly is used to mount a nozzle pipe on a rectangular girder. The pipe includes a mounting clip with a body having a support foot forming an inverted L-shaped configuration to engage over an upper corner of the...     

A gas purification device comprising substantially concentric chambers separated by a filter tube is disclosed. The filter tube forms a common wall between adjacent chambers. Gas enters one of the chambers, passes through the filter, and exits from the other chamber. The gas is filtered by passage through...     

A granular bed filter, capable of being backwashed, is disclosed without screens. The filter beds of granular material are generally U-shaped in section.

A fiberglass bag filtering unit adapted for use in filtering gaseous streams containing suspended solid particulates wherein a reverse flow of compressed air is utilized during the cleaning cycle, said unit featuring the advantage of being conveniently adjustable to provide a requisite degree of cloth...     

A filtering separator for cleaning dust and smoke-particle-laden gases comprising a separator, a duct connected to the gas inlet of the separator and containing dust collector bodies around which the dirty gas flows, means for detaching particles which collect on and between said bodies, said detaching...     

An apparatus for the separation of particles from a gas of the type which has filter elements disposed around a drum located in the center of a housing with a shutter mechanism. The improvement of the present invention also relates to an apparatus which allows separation and emptying of filter elements...     

A cleaning system for sleeve-type air filters featuring top removal of sleeves of the filtering media and increased filtering capacity, using sharply pulsed backflushing air of short duration from a single source for cleaning the sleeves which requires substantially less power and simpler mechanical...     

There is provided a filter wherein the filtering means has a non-woven needled textile filter fabric with an overall bulk density of at least 6 pounds per cubic foot and bulk density gradient such that the bulk density at the face surface of the fabric is greater than the bulk density at the back surface...     

A filter element support assembly for use with hollow, cylindrical, pleated media filter elements is disclosed. The filter elements are placed on the support in end-to-end abutting relationship. The support includes a plurality of baffle plates in parallel spaced relationship, which isolate the interior...     

A filter box contains within a rotatably mounted filter, structured as a drum, a fiber preseparator cooperating with such filter. The fiber preseparator has a ventilator at its inlet and operatively flow communicates with a fiber separator. This fiber separator contains a movable plunger or equivalent...     

A novel arrangement for mounting the filter elements of an air filter in a manner which facilitates their removal and replacement without tools or accessories.

The size of an air filter is greatly reduced compared to the size of conventional bag house type filters by the use of pleated paper filter elements grossly derated to withstand the sudden pulsating forces inherent in reverse jet cleaning.

In an air cleaner device for removing dust or other particles from air, and including a filter system of a circular line of filter bags through the walls of which the air is forced into the interior of the bags, an apparatus for removing accumlations of filtered-out particles adhering to the outer surfaces...     

Apparatus for filtering a gas stream including a common manifold to which, in use, gas to be filtered is passed, a plurality of gas outlets from said manifold, a plurality of particle separators adapted to remove particles from said gas stream prior to exiting from said gas outlets and wherein said particle...     

A laboratory bench assembly having work stations which are retractable into the interior of the bench to provide a clear and unobstructed bench space when not in use; an air flow is created within said bench by a blower, the air flow carrying dust particles from each work station through a conduit into...     

A cell filter apparatus of the bag or stocking type having a housing is disclosed. A gas deflector and boundary wall between a raw gas duct and a dust chamber upstream from the filter cells form a tapering duct having an outlet passage for coarse dust particles at its narrow end. Either the deflector...     

A dust separator which has an inlet enclosure having an inlet for dust-laden gas, an outlet enclosure having side walls and connected to a pipe for discharging the dust-freed gas, a separating wall separating the inlet and outlet enclosures, several elongated filtering elements disposed in the inlet...     

A jet pulse bag type collector which makes use of a venturi and a wire cage which extends internally substantially throughout the length of the filter bag, in which the wire cage is supported from the venturi and the filter bag is supported between the wire cage and a portion depending from about the...     

An air filter having a counter rotating drum, i.e., the rotation of the drum is opposite the tangential intake of air. The intake air has about 1 lb. of rock wool fibers per 10.sup.7 cu. ft. of air sometimes at about 100% relative humidity. The fibers are doffed from the drum by suction nozzle which...     

A filter installation for a filter housing including a header plate having an aperture of a predetermined diameter, a tubular filter, a venturi-like member extending through the aperture into one end of the filter, an annular shoulder on said member having an outermost diameter at least substantially...     

There is provided a filter wherein the filtering means has a non-woven needled textile filter fabric with an overall bulk density of at least 6 pounds per cubic foot and bulk density gradient such that the bulk density at the face surface of the fabric is greater than the bulk density at the back surface...     

A gas filtering bag house having a stepped partition intermediate the bags and the hopper with the gas inlet located in side wall below partition at maximum spacing of partition and hopper--The baghouse including walkway intermediate bay height and overlying other bags.

A filter housing having one or more flow-through media support members releasably secured in the housing between the dirty gas inlet and the clean gas outlet to divide the housing into a dirty gas chamber and a clean gas chamber.

A bag filter assembly adapted to permit rapid removal, replacement and repair of the individual filter bags in the assembly. The filter bags are frictionally held in an operational position by a combination of interlocking parts that are securely held by spring biased detents. The spring biased detents...     

A filtering device for removing particulate matter from a gas stream includes a housing with its interior divided by a horizontal partition into an upper plenum chamber and a lower plenum chamber. Planar panel filters arranged in V-shaped banks are suspended from the horizontal partition in the lower...     

A filter arrangement including a venturi element carried within a tubular filter by a flexible attachment ring at one end of the filter removably securing the filter in the aperture of an apertured plate member in a gas filtration system. The outermost diameter of the venturi element is slightly less...     

Powder collectors for the automatic collection and recycling of powders such as in a powder coating booth are disclosed. The collectors utilize a rollaway collection assembly having one or more cartridge filters therein so as to allow the quick change of vector assemblies on the coating booth for color...     

A cleaning arrangement for a pleated filter includes opposite blower and suction heads parallel to the pleats that move in tandem to effect cleaning. In the preferred embodiment, the heads have air slots that are effectively as wide as a single pleat, the blower slot extends substantially across the...     

A system for cleaning dust collecting filter bags with pulsed air includes a plurality of rectangular channels positioned below a tube sheet supporting rows of filters. A short length of pipe connects the channels through the tube sheet to the top of a venturi within the open end of each filter bag....     

A bag filter apparatus that exhausts a blast of compressed air into the open ends of a series of filter bags to remove dust particles that have collected on the outer surface thereof. The compressed air is exhausted from nozzle means in a header pipe that is precluded from excessive distortion, while...     

An air treatment apparatus for removing particulate matter and contaminants from a flow stream of air includes an air inlet chamber coupled to an air inlet duct and two spaced-apart air flow chambers communicating with the air inlet chamber at a first end and with an outlet duct at their opposite end....     

An improvement in a decantation cyclone, particularly for the separation of air from material which is light and has a relatively large surface by means of a grid having relatively wide meshes rotatable about an axis which is perpendicular to the plane in which the grid itself lies. The rotation of the...     

An engine air cleaner comprising a cylindrical housing containing an annu perforate cleaning medium and a set of pre-cleaning baffles in the housing space surrounding the cleaning medium. The baffles maintain the dust-laden gas in a swirling condition, thereby centrifugally forcing heavy dust particles...     

A method for filtering dust from a dust-laden gas stream utilizing a tubular fabric filter is provided wherein cleaning of said filter is accomplished by backflow of gas through the filter wall and axial pulsations of gas along the longitudinal axis of the tubular filter.

A bag filter arrangement having a cleaning system that exhausts a reverse pulse of compressed air through the bags thereof to remove collected dust particles from the surface of the bags. The arrangement is directed to a special cooperation of interlocking elements that positively align the several elements...     

Disclosed herein is a locking mechanism for releasably mounting a row of filter elements in sealing engagement within a filter assembly. The locking mechanism includes a pair of spaced longitudinal bars, substantially semicircular in cross section, which are pivotly mounted within the filter assembly...     

An improved valve system for creating reverse pulses of air through the filter element of a vacuum cleaner in order to shake and drive collected dust from the filter element during operation of the vacuum cleaner, by equipping the vacuum cleaner with a valved conduit downstream from the filter element...     

An air cleaning method and apparatus in which air to be cleaned is drawn toward and through a filter (44, 45) along a normal path having a first component extending from a first to a second end of the filter, so as to initially collect particulate matter on the filter,in which momentary pulses of clean...     

A filter device comprising a tubular housing with an inlet for the fluid to be filtered in one end of the housing, an outlet for filtrate in the opposite end of the housing and a filter tube mounted inside the housing and extending essentially in the axial direction of the tubular housing. At least part...     

A dust-collector of the bag filter type to filter and trap dust and other solid material entrained in flue gases uses a plurality of bags suspended in an array to cooperate with a shaking mechanism. Each bag has an open bottom end and is suspended resiliently taut and in communication with an inlet gas-duct...     

Filtration system configurations particularly useful for cleaning high temperature raw gas containing fine particulates such as that discharged from coal gasification and fluidized bed combustion processes. Thin filter elements, having elongated clean channels on one side of a gas permeable ceramic membrane...     

A filter bag having a protective cuff adjacent the closed "free" end of the filter bag for protecting the "free" end from abrasion damage. The protective cuff is preferably formed of a band of material attached circumferentially to the outer wall of the filter bag along a longitudinal edge of the band....     

An air cleaner including a casing having an inlet for air to be cleaned and an outlet for cleaned air, a filter in the casing separating the inlet from the outlet, a shroud in the casing separating the filter from the inlet, a first valving arrangement operable to enable flow of air from said inlet to...     

A process and apparatus for recovering carbon black from hot smoke which comprises passing the smoke through a cyclone separation zone following cooling, then through aggregate filter beds and regeneration of filter beds with clean off-gas which is recycled to the carbon black reaction zone as quench.

An air cleaning method and apparatus in which air to be cleaned is drawn toward and through a filter (44, 45) along a normal path having a first component extending from a first to a second end of the filter, so as to initially collect particulate matter on the filter, in which momentary pulses of clean...     

A modular dust collection and filtration apparatus including a housing forming a primary inertial and gravitational separation chamber and including first and second dust collection hoppers. A vertically extending duct is disposed in the housing and extends through a partition separating one of the hoppers...     

Improved system for controlling means attendant the discharge of coke ovens and for collecting particulate matter associated therewith by venting the exhaust gases through fabric filter means.

An industrial baghouse having a single clean air plenum in which a portion of the filter bags can be serviced while the baghouse remains on line. Service compartments in the clean air plenum can be individually isolated from the remainder of the clean air plenum by installing removable slide gates through...     

Method and filter apparatus for extracting entrained lint particles from an effluent air stream prior to discharge into the atmosphere. The filter apparatus and method are used in combination with a vertical settling chamber for separating relatively dense fiber product from airborne lint entrained in...     

Commercial pleated paper filter elements are applied at full rated gas flow capacity in applications requiring removal of large quantities of particulate matter from large volumes of flowing air or other gas by combining the elements as second stage filters with a primary stage cyclonic separator and...     

A filter assembly for removing particulate matter from high temperature gas streams is disclosed, said filter assembly comprising: a rigid, tubular frame or cage made of high temperature stable material, having a closed lower end, or optionally an open lower end, and adapted to be connected to a gas...     

A spray booth is disclosed for applying powder coating to substrates. There is a self contained recovery/filter system located beneath the floor of the booth, which recovery/filter system is removably attached to the booth so that another recovery/filter system may be conveniently substituted when changing...     

The present invention provides a fluid cleaning system, especially designed for removing particulate contaminants from a hot gas, comprising at least two parallel lines for receiving contaminated fluid. Each line includes a collector (5), a collector cleaning means (8), and a vortex amplifier (6). The...     

In pneumatic low pressure dust extraction apparatus, filter bags are cleaned by reverse flow of air. Each cleaning operation includes a first shock phase of short duration (not longer than 0.05 sec) but at high flow intensity by which accumulated layers of dust are thrown off the outside of the bag,...     

Effluent with entrained particles is drawn through a filter module (A) by an exhaust blower (B). The filter module includes an inertial separator (C) for providing an inertial separation of particles from the effluent air and a plurality of filter cartridges (D) which allow air to pass therethrough but...     

An improved selfcleaning air filter (2) of the pulse jet type. The filter includes at least one filter element (20) located in a dirty air plenum (6) which is separated from a clean air plenum (8) by a partition (10). A nozzle (70) directs a cleaning jet of gas that moves in a back flow direction along...     

A layer of particles of carbon black is used as a filtration medium in the separation of carbon black from a gaseous stream containing carbon black.

A classifier for separating particulate matter into relatively coarse and fine particles. The classifier includes a casing, at least one cylindrical screen assembly mounted in the casing and extending substantially in the direction in which the particulate matter flows in the casing for forcing the fine...     

A filter cleaning device for purging filters made of porous material employs a tank containing pressurized air and a flow conduit communicating with the tank. A shield mounted on the flow conduit is shaped to engage the filter whereby the pressurized air is suddenly released into an interior chamber...     

A tubular-filter device with compressed-air cleanout has a tube-acceptor plate with insertion openings, each of which having a tubular filter fastened therein with a support basket in each tubular filter. The support basket has a resilient upper edge and the tubular filter is clamped with a band tightly...     

An improved self-cleaning air filter (2) of the pulse jet type. The filter includes at least one filter element (20) located in a dirty air plenum (6) which is separated from a clean air plenum (8). A valve (64) directs a cleaning jet of gas that moves in a back flow direction along the filter element...     

There is provided a powder spray chamber for coating the surface of workpes disposed in a coating space having a rotationally symmetrical filter carrier carrying a filter element on its mantle, the filter carrier being rotatingly mounted in an opening in a wall separating the coating space from a clean...     

A device for filtering stack gases, such as produced by a coal fired electric generating plant, includes a plurality of movable dual filter elements positioned downstream from the point of combustion where dry solid waste including calcium sulphite (CaSO.sub.3) and fly ash are present in the flue gas,...     

A high capacity gas filter having a particulate collector hopper having a bag housing mounted thereon with the walls of the housing extending outwardly and upwardly from the hopper. The walls terminate in gas passages which may be covered by outwardly extending hoods open at the underside thereof so...     

A cooling device for use in ale coolers, automatic beverage machines, air-conditioning apparatus or the like, said cooling device mainly comprising a series-connected evaporator 3, a compressor 4, a lamella condensor 5 and an air displacing member 6 for generating a cooling air stream P along the condensor...     

An apparatus especially suitable for filtering out a particulate material from a carrier fluid such as flue gases is disclosed herein. This assembly utilizes a main vessel defining an interior compartment and having an inlet and separate outlet. A number of filter assemblies are disposed within the vessel...     

A filter system wherein a cylindrical shell having open ends and a gas-impervious wall with means for supporting a filter tube coaxially within the shell to form an annular chamber therebetween has means for securing the filter tube to the other open end, such that gases from the enclosure must pass...     

A reverse air jet cleaning system for impingement or porous media type air filter elements includes one or more specifically shaped cleaning air manifolds or heads in which a plurality of jet nozzles or orifices are arranged in a predetermined pattern to provide a totally enveloping air jet which is...     

A classifier for separating into particulate matter relatively coarse and fine particles. The classifier includes a casing, at least one cylindrical screen assembly mounted in the casing and extending substantially in the direction in which the particulate matter flows in the casing for forcing the fine...     

Aerosols such as a carbon black containing smoke are subjected to an auto-preseparation by passing the aerosol or smoke through loose particles collected and accumulated and only thereafter passing the aerosol or smoke through a separator such as a filter bag. This changes the characteristic of the aerosol...     

Industrial filter for separating solid particles from a streaming gaseous medium the filter having a filter insert formed from a single band of knitted fabric. The filter insert is provided with a smooth permeable layer of amorphous synthetic polymeric material at least on its inlet inside. Longitudinal...     

An improved industrial filter apparatus for separating particulate material from air and/or other gases is disclosed. A plurality of individual filter elements are enclosed in a housing which admits particulate laden gases to enter the top of the housing and flow downwardly, radially inwardly of the...     

The housing of the stratified bulk material filter contains several vertical bulk material layers which may be traversed transversely by crude gas flow, and are enflanked at both sides by delimitations and which may be supplied with particulate bulk material from above. A periodically occurring flushing-gas...     

A flour recycling system includes a compressed air and vacuum head placed over a bakery product conveyor line. Flour is removed from the product units and is conveyed through a vacuum hose to the inlet of a remotely located dual stage separator in which the flour with entrained dough particles is subjected...     

A fire suppression system including a housing for receiving particulate matter and defining an inlet opening and an outlet opening, an input duct connected to the inlet opening, an air mover for forcing air through the input duct into the housing and out of the outlet openings, and filter means disposed...