Abstract: A jet pulse chamber venturi collector wherein a venturi is provided between the upper end portions of adjacent columns of filter stacks mounted in a dust collector housing wherein particulate laden gases flow downwardly through the venturi and are accelerated to such a degree so as to be pushed directly into the dust collecting hopper. A double pulse cleaning system fires a first pulse of compressed air into the interior of the filter stacks, which is instantaneously followed by a second pulse.

Abstract: A venturi booster mounted between axially aligned first and second filter elements in a dust collector of the type having a compressed air source for conveying pulses of compressed air to the filter elements for periodically reverse flow cleaning of the filter elements, the venturi booster being constructed and arranged to divide the compressed air flow to retain approximately 50% of the air flow within the first filter element and the balance passing through the venturi booster into the second filter element.

Abstract: A plate venturi for a dust collector filter cleaning system having a compressed air pipe for delivering pulsed compressed air jets through the venturi against a filter to remove particulates therefrom. The venturi is provided by a pair of spaced metal plates welded to each side of the compressed air pipe and extending tangentially therefrom. The plates diverge outwardly relative to each other to provide a throat portion therebetween. An elongated opening is provided in each plate in proximity to the compressed air pipe and the space between the plates provides openings at each end of the venturi so that upon pulse firing a jet of compressed air through the venturi, large quantities of air are induced through the openings in the plates of the venturi and through the open ends thereof, increasing the air mass and velocity, to thereby increase the impact effectiveness on cleaning the filter.

Abstract: A plate venturi for a dust collector filter cleaning system having a compressed air pipe for delivering pulsed compressed air jets through the venturi against a filter to remove particulates therefrom. The venturi is provided by a pair of spaced metal plates welded to each side of the compressed air pipe and extending tangentially therefrom. The plates diverge outwardly relative to each other to provide a throat portion therebetween. An elongated opening is provided in each plate in proximity to the compressed air pipe and the space between the plates provides openings at each end of the venturi so that upon pulse firing a jet of compressed air through the venturi, large quantities of air are induced through the openings in the plates of the venturi and through the open ends thereof, increasing the air mass and velocity, to thereby increase the impact effectiveness on cleaning the filter.

Abstract: An air inlet for a dust collector wherein a scroll inlet duct and an associated cylindrical duct are mounted on the top wall of the dust collector housing so that dust-laden gas flows into the scroll duct and through the cylindrical duct resulting in a rotational path of downwardly flowing gas within the cylindrical duct providing a centrifugal force on the gas so that when the dust-laden gas enters the collector housing it spreads outwardly toward the walls of the collector housing and downwardly resulting in a substantial cloud of uniform flow of dust-laden gas over the length and width of the collector housing to provide a uniform deposit of dust particles on the filters while precluding abrasion of the filter media. A perforated metal plate is positioned in the collector housing in proximity to the outlet of the cylindrical dust to facilitate the outward and downward flow of dirty gas in the collector housing.

Abstract: A dust collector filter cleaning control system employing high-pressure compressed air pulses, wherein the dislodged dust particulate is prevented from returning to the filters after the high-pressure compressed air cleaning thereof by briefly maintaining a positive low-pressure compressed air within the cleaned filters so that the particulate removed from the filters has time to drop into the collector hopper. The same source of compressed air is employed for both the filter cleaning air pulses and the sustaining low air pressure for preventing the re-entrainmnet of the dust particles into the filters.

Abstract: 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 individual filter units so that particulates accumulate on the exterior of the filters. The interior of a plurality of filters communicate with a common clean air duct functioning as a plenum which is closed at one end and open at its opposite end to a clean air outlet fitting in the side wall of the housing. Also within the clean air duct are a plurality of venturis communicating with the duct and the interior of each filter. A compressed air source is arranged to fire pulses of air upwardly through the venturis to remove the particulates from the exterior filter surface.

Abstract: A self cleaning industrial dust filter includes a housing divided by a tube sheet into an upper clean air chamber and a lower dirty air chamber. Pleated fiber cartridge type filters are supported in the lower chamber from the tube sheet and the interior of the filters communicate with the clean air chamber through openings in the tube sheet, one for each filter. The lower chamber is formed as a plurality of panel venturis which converge downwardly from the lower end of the filters to a narrow throat. A clean air outlet connects with the upper chamber and a dirty air inlet with the lower. Downwardly directed jet nozzles are positioned in each venturi to induce reverse flow through the associated filters, remove accumulated particulates and conduct them to a take out at the base of the lower chamber.

Abstract: Method and apparatus for maintaining the permeability of porous filtering media used in filtering gaseous suspensions. More particularly the invention defines Inside Bag Dust Collection wherein high energy pressurized gas is introduced for cleaning the filtering media. In the method and apparatus pneumatic impulse forces, derived from a series of charges of pressurized gas are directed downwardly through ever open venturi means and away from the interior of the filter bags; specific jet nozzle elements optimize the efficiency of the pressurized gas application, and an induced air funnel means within the bag causes vertical force resolution for induced air cleaning flow. Spoiler means are provided within jet nozzle means such that particulate matter will neither enter nor accumulate in the jet nozzle opening during normal, onstream gas flow conditions. There is also an accommodation to the conventional dirty gas chamber to efficiently receive high velocity, high volume induced air cleaning flow.