Centrifugal air cleaner
First Claim
1. A centrifugal air cleaning apparatus, comprising,a housing defining a filter compartment including opposite end walls, and peripheral side walls connected to and extending between said opposite end walls, one end wall having an air outlet opening generally centered thereon,a vacuum source,fluid passage means establishing communication between said vacuum source and air outlet opening,a generally tubular filter cartridge having a closed bottom end and an open upper end,means for mounting said filter cartridge in said filter compartment with said open upper end connected to said air outlet opening so that air flow from said open upper end of the filter is directed through said air outlet opening,an air inlet opening through one of said peripheral side walls, anda flame arrestor operatively associated with said air inlet opening, such that air flow through said air inlet opening is directed through said flame arrestor,said flame arrestor including a plurality of flow diverting surfaces for extinguishing sparks in air passing therethrough,said flame arrestor being operative to direct air into said filter compartment generally tangentially of said filter cartridge thereby to effect centrifugal air flow within said filter compartment.
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Accused Products
Abstract
A centrifugal air cleaning apparatus includes a housing defining a filter compartment containing a generally tubular filter cartridge having the open upper end thereof in communication with an air outlet opening through the top wall of the filter compartment. A vacuum source is provided in communication with that air outlet opening to effect vacuum pressure within the filter compartment. An air inlet opening through a side wall of the filter compartment has a multi-baffled flame arrestor associated therewith for extinguishing sparks in the fumes being drawn into the filter compartment and for directing the incoming air flow tangentially of the filter cartridge so that a portion of the pollutants carried in the fumes are separated by gravity before the fumes contact the filter cartridge. An injector conduit is provided within the flame arrestor to facilitate blowdown. A precoat feed conduit is supported in the filter compartment in upright spaced relation from the filter cartridge and has a plurality of vertically spaced outlet ports facing the cartridge for uniform distribution of precoat material under the filter cartridge. Efficient blowdown of the filter cartridge is accomplished by a diffuser hose extending downwardly through the filter cartridge, which hose has a plurality of vertically and circumferentially spaced apart outlet ports for directing multiple blasts of air radially outwardly from the hose along the full extent of the height of the filter cartridge. Collected dust is removable from the filter compartment either by a removable dust collection pan or automatically by an eductor associated with a hopper baffle at the base of the filter compartment.
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Citations
33 Claims
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1. A centrifugal air cleaning apparatus, comprising,
a housing defining a filter compartment including opposite end walls, and peripheral side walls connected to and extending between said opposite end walls, one end wall having an air outlet opening generally centered thereon, a vacuum source, fluid passage means establishing communication between said vacuum source and air outlet opening, a generally tubular filter cartridge having a closed bottom end and an open upper end, means for mounting said filter cartridge in said filter compartment with said open upper end connected to said air outlet opening so that air flow from said open upper end of the filter is directed through said air outlet opening, an air inlet opening through one of said peripheral side walls, and a flame arrestor operatively associated with said air inlet opening, such that air flow through said air inlet opening is directed through said flame arrestor, said flame arrestor including a plurality of flow diverting surfaces for extinguishing sparks in air passing therethrough, said flame arrestor being operative to direct air into said filter compartment generally tangentially of said filter cartridge thereby to effect centrifugal air flow within said filter compartment.
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18. A centrifugal air cleaning apparatus, comprising,
a housing defining a filter compartment including a top wall, bottom wall and peripheral side walls, said top wall having an air outlet opening generally centered thereon, a vacuum source, fluid passage means establishing communication between said vacuum source and air outlet opening, a generally tubular filter cartridge having a closed bottom end and an open upper end, means for mounting said filter cartridge in upright relation within said filter compartment with said open upper end connected to said air outlet opening so that fluid flow from said open upper end of the filter is directed through said outlet opening, an air inlet opening through said side wall, means for directing air through said air inlet opening into said filter compartment generally tangentially of said filter cartridge thereby to effect centrifugal air flow within said filter compartment, and an elongated precoat feed conduit having an open inlet and a plurality of spaced apart outlet ports, means for supporting said precoat feed conduit in generally upright relation adjacent said filter compartment side wall with said outlet ports in communication with the interior of said filter compartment, said inlet end being arranged exteriorly of the filter compartment such that upon immersion of said inlet end in precoat material, vacuum pressure from said vacuum source is operative to draw precoat material through said conduit and outlet ports toward said filter cartridge at a plurality of vertically spaced apart positions thereon.
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22. A centrifugal air cleaning apparatus, comprising,
a housing defining a filter compartment including a top wall, bottom wall and peripheral side wall, said top wall having an air outlet opening generally centered thereon, a vacuum source, fluid passage means establishing fluid communication between said vacuum source and air outlet opening, a generally tubular filter cartridge having a closed bottom end and an open upper end, means for mounting said filter cartridge in upright relation within said filter compartment with said open upper end connected to said air outlet opening so that flow from said open upper end of the filter is directed through said outlet opening, an air inlet opening through said side wall, means for directing air through said air inlet opening into said filter compartment generally tangentially of said filter cartridge thereby to effect centrifugal air flow within said filter compartment, and a filter cartridge blowdown apparatus including an elongated diffuser hose having upper and lower ends, means for supporting said diffuser hose in upright relation in said filter compartment in registration with said top wall air outlet opening, said diffuser hose having a plurality of circumferentially and vertically spaced apart outlet ports therethrough, and means for disengageably connecting the upper end of said diffuser hose to a source of pressurized air for directing blasts of air generally radially outwardly from said outlet ports to blowdown said filter cartridge.
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30. A centrifugal air cleaning apparatus, comprising,
a housing defining a filter compartment including a top wall, bottom wall and peripheral side walls, said top wall having an air outlet opening generally centered thereon, a vacuum source, fluid passage means establishing fluid communication between said vacuum source and air outlet opening, a generally tubular filter cartridge having a closed bottom end and an open upper end, means for mounting said filter cartridge in upright relation within said filter compartment with said open upper end connected to said air outlet opening so that fluid flow from said open upper end of the filter is directed through said outlet opening, an air inlet opening through said side wall, and means for directing air through said air inlet opening into said filter compartment generally tangentially of said filter cartridge thereby to effect centrifugal fluid flow within said filter compartment, and a dust collection pan, means for supporting said dust collection pan in said filter compartment below said filter cartridge, and baffle means on said filter compartment peripheral side walls extending downwardly and interiorly therefrom so as to direct dust falling by gravity in said filter compartment into said dust collection pan.
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32. A centrifugal air cleaning apparatus, comprising,
a housing defining a filter compartment including a top wall, bottom wall and peripheral side walls, said top wall having an air outlet opening generally centered thereon, a vacuum source, fluid passage means establishing fluid communication between said vacuum source and air outlet opening, a generally tubular filter cartridge having a closed bottom end and an open upper end, means for mounting said filter cartridge in upright relation within said filter compartment with said open upper end connected to said air outlet opening so that fluid flow from said open upper end of the filter is directed through said outlet opening, an air inlet opening through said side wall, and means for directing air through said air inlet opening into said filter compartment generally tangentially of said filter cartridge thereby to effect centrifugal fluid flow within said filter compartment, and said bottom of said filter compartment comprising a hopper baffle including downwardly and interiorly inclined wall portions converging toward a discharge opening and further comprising an elongated generally tubular eductor having inlet and outlet ends and a dust inlet opening intermediate said ends in communication with said hopper baffle discharge opening, means for connecting said inlet end to a source of pressurized air whereby air flow through said eductor is operative to draw dust from said hopper for discharge through said outlet end.
Specification