Abstract:
An apparatus for the processing and scrubbing of contaminated gases i.e., gases entrained with particulate matter, is presented. The apparatus comprises a primary dust removal unit which receives a descending gas pipeline originating from a generator or source of contaminated gases. This primary dust removal unit acts to precipitate the larger solid particles from the contaminated gas via gravity and/or inertia to define semi-scrubbed gas. A plurality of scrubbers are provided within the primary dust removal unit to form the forced scrubbing of the semi-scrubbed gases from the primary unit. Each of these scrubbers contain a series of bag filters which are traversed from bottom to top by the semi-scrubbed gases. The scrubbers also include means for monitoring the temperature of the gases at different points in their passage and means for cooling or heating the gases in order to maintain their temperature within predetermined operational limits.
Abstract:
Disclosed are pleated paper barrier type air filter elements having planar filter panels that are cleaned by a reverse air jet cleaning system which 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 discharged into a flow tube immediately downstream of the clean air flow chamber of a generally tubular filter element. The jet pattern provides a temporary pressure seal within the flow tube and entrains a substantial amount of ambient air into the reverse flow jet to thoroughly flush elements to clean dust cake from the exterior surfaces thereof. The multiple jet arrangement reduces the overall space occupied by the reverse jet cleaining system and provides a larger mass flow of cleaning air. Multiple jet orifice heads or manifolds may be configured in virtually any geometric shape to provide a desired jet pattern. The planar filter panel elements allow high media face velocites with low flow tube velocities. Oval filters are provided which have a greater clean air flow area than a plurality of cylindrical elements fitted within the same dimensional envelope.
Abstract:
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 not particles. A plenum E interconnects the filter cartridges with the exhaust blower to channel the filtered air from the filter module to the exhaust blower. A flow controller (F) controls the flow rate of air through each of the filter cartridges maintaining it substantially constant. The flow controller includes a flow rate sensor for sensing the flow rate through each filter cartridge and a butterfly damper blade for selectively restricting the plenum to maintain the flow rate substantially constant. A filter cartridge cleaner (G) is selectively actuated when the flow controller is unable to maintain a preselected minimum flow rate. The cartridge cleaner includes a pneumatic shock wave generator disposed in the plenum in axial alignment with each of the filter cartridges. A heat exchanger housing (400) surrounds the filter module to recover heat from the filtered air.
Abstract:
A self-cleansing air cleaner comprising an air blast nozzle which is driven at constant speed through a path including at least two filter sections includes means responsive to each air blast to temporarily halt the nozzle during at least part of the duration of the blast, and to thereafter re-synchronize the nozzle movement with that of the constant speed drive.
Abstract:
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.
Abstract:
A filter bed separator for separation of liquid or solid particulates from gas streams and/or for washing of accumulated solids from the filter bed. Each separator contains one or more cylindrical filter bed elements, each comprising a non-matting bed of filter material defining a hollow cylindrical filter bed element having a hollow core, with the filter bed terminating at the walls of a gas inlet duct. The gas inlet duct comprises one or more ducts disposed along at least a portion of the longitudinal length of the cylindrical element with the walls of the duct extending from outside the housing of the separator to the inner circumference of the filter bed.