Mist filtration arrangement utilizing fine fiber layer in contact with media having a pleated construction and floor filter method
AssigneeDonaldson Company, Inc.
InventorsBruce A. Johnson, Mark A. Gogins
Life of this patent
Estimating the term…
Abstract
Filter arrangements for mist removal include a barrier media, usually pleated, and treated with a deposit of fine fibers. Filter arrangements may take the form of tubular, radially sealing elements; tubular, axial sealing elements; forward flow air cleaners; reverse flow air cleaners; and panel filters and can have multiple layers of fine fiber containing pleated media.
Claims43
A mist collection filter comprising a filter media, the filter media comprising:
- (a) a mist polish layer having a first end and a second end, said layer comprising a substantially planar sheet-like substrate having a first side and a second side, said layer having a plurality of pleats formed therein and extending from said first end to said second end, the layer comprising a substrate having a pore size less than 400 microns, a permeability of about 50 to 1000 feet per minute;
- a thickness of less than 0.05 inch and a basis weight greater than 30 lb.-3000 ft−2;
- (b) at least one of said first side or said second side of the substrate, substantially covered by a polymeric fine fiber layer, the layer having a thickness of about 0.2 to 100 microns, the fiber having a diameter of about 0.01 to about 5 microns and said media layer being secured in said filter wherein the filter has the capacity of collecting and draining in a liquid form at least 50 mg/m3 of mist.
A sheet-like filter media for mist collection comprising a fine fiber layer in intimate contact with a substantially planar sheet-like mist polish substrate, said substrate having a pore size less than about 400 microns, a permeability about 150 to 400 feet per minute, a thickness of less than about 0.05 inch and a basis weight greater than 40 lbs-3000 ft−2;
- said sheet-like substrate having a first side and a second side, at least one of said first side and said second side of the sheet-like substrate substantially covered by a layer of polymeric fine fiber, the fiber having a diameter of about 0.1 to about 5 microns, the layer having a thickness of about 0.2 to 100 microns wherein the filter has the capacity of collecting and draining in a liquid form at least 50 mg/m3 of mist.
A mist collection filter comprising a filter media layer, the filter media comprising:
- (a) a mist polish layer having a first end and a second end, said media layer comprising a substantially planar sheet-like substrate having a first side and a second side, said layer having a plurality of pleats formed therein and extending from said first end to said second end, the layer comprising a media having a pore size less than 400 microns, a permeability of about 150 to 400 feet per minute;
- a thickness of less than 0.05 inch and a basis weight greater than 40 lbs-3000 ft−2;
- (b) said first side and said second side of the sheet-like substrate, at least partially covered by a polymeric fine fiber layer, the layer having a thickness of about 0.1 to 100 microns, the fiber having a diameter of about 0.01 to about 5 microns and said media layer being secured in said filter wherein the filter has the capacity of collecting and draining in a liquid form at least 50 mg/m3 of mist.
A sheet-like filter media for mist collection comprising a fine fiber layer in intimate contact with a substantially planar sheet-like mist polish substrate, said substrate having a pore size less than about 400 microns, a permeability about 150 to 400 feet per minute, a thickness of less than about 0.05 inch and a basis weight greater than 40 lbs-3000 ft−2;
- said sheet-like substrate having a first side and a second side, said first side and said second side of the sheet-like substrate substantially covered by a layer of polymeric fine fiber, the fiber having a diameter of about 0.1 to about 5 microns, the layer having a thickness of about 0.1 to 100 microns wherein the filter has the capacity of collecting and draining in a liquid form at least 50 mg/m3 of mist.
A mist collection filter comprising a filter media, the filter media comprising:
- (a) a mist polish layer having a first end and a second end, said layer comprising a substantially planar sheet-like substrate having a first side and a second side, said layer having a plurality of pleats formed therein and extending from said first end to said second end, the layer comprising a substrate having a pore size less than 400 microns, a permeability of about 50 to 1000 feet per minute;
- a thickness of less than 0.05 inch and a basis weight greater than 30 lb.-3000 ft−2;
- (b) at least one of said first side or said second side of the substrate, substantially covered by a polymeric fine fiber layer, the layer having a thickness of about 0.2 to 100 microns, the fiber having a diameter of about 0.01 to about 5 microns and said media layer being secured in said filter wherein the filter has the capacity of collecting at least 50 mg/m3 of mist and draining the mist in a liquid form;
- wherein the filter comprises an outerwrap filter having a porosity and permeability greater than the filter.
Dependencies are inferred from the claim text.