Filter apparatus with reverse flow cleaning

Details Filter apparatus with reverse flow cleaning Filter apparatus with reverse flow cleaning

1979-05-29

1981-07-14

Prunner, Kathleen J.

Gas separation

With nonliquid cleaning means for separating media

Cohesive filter media cleaning

55341R, 55379, 55484, 55492, 55498, 55502, 55521, B01D 4604

Patent

active

042784549

ABSTRACT:
Cartridge type filters are suspended in hopper. Contaminated air flows into the hopper, passes through the filters and clean air is removed through an exhaust duct. Periodically a reverse stream of compressed air is directed through an inductor unit into each filter from the exhaust side to pressurize the filters and clean contaminants from the outer surface of the filter medium. With reference to the flow of the reverse stream, the walls of the inductor flare generally on a taper upstream from a restricted throat to a generally bowl-shaped section which flares to a diameter greater than the diameter of the throat. The bowl-shaped section extends upstream to merge with an arcuate section of a bell-mouth inlet which is convex to the exhaust chamber and terminates in a lateral flanged end. The throat is generally arcuate and convex to the inductor interior. The reverse stream, coming from a nozzle above each inductor, does not impinge on the inductor interior walls until it reaches an area immediately upstream of the throat. Air aspirates into the unit over the bell-mouth section and is accelerated and merged with the main reverse stream passing through the throat into the filters. The relationship of the minimum throat diameter, interior diameter of the filter and the distance from the minimum throat diameter to the bottom of the filter medium is such that the stream discharged through the throat does not impinge on the inner walls of the filter medium. The downstream end of the inductor is generally bell-mouth shaped having an arcuate section merging with the throat.

REFERENCES:
patent: 3499268 (1970-03-01), Pausch
patent: 3606736 (1971-09-01), Leliaert et al.
patent: 3726066 (1973-04-01), Colley et al.
patent: 3853509 (1974-12-01), Leliaert
patent: 4042356 (1977-08-01), Miller

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