US 5,308,590 AGranted

Apparatus for removing particulate matter and gases from a polluted gas stream

AssigneeAlanco Environmental Resources Corp.

InventorsLarry M. Kersey, Richard A. Steinke

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Abstract

Apparatus arranged in a closed system for removing particulate matter and gases from a polluted gas stream that includes a sorbent particulate charging and injection gun for electrostatically charging sorbent particles and injecting them into a polluted gas stream to charge and agglomerize pollution particulates therein, the stream flowing into a collection system housing that contains a series of moving and static bed filters and provides for operations at pressures less than atmospheric, and at temperatures up to two thousand (2000) degrees F. The filter beds are maintained across the housing and spaced apart from front to back therein, each filter containing a media material selected for removing the charged agglomerized pollution and sorbent reacted particulates and reacting with gases in the polluted gas stream, providing for removal thereof to clean that gas stream that is then vented to atmosphere. At least one and preferably a plurality of moving bed filters are arranged in the collection system housing, each, in turn, receiving and passing the gas stream therethrough, which filter beds each include rotary airlock and rotary valves for maintaining a closed system and preventing infiltration of outside air within the housing while still allowing new media materials to be added and vented out of the filter, and including a static filter bed or beds arranged as the last filter bed or filter beds in the series that provides for a removal of any remaining pollutants from the gas stream prior its venting to atmosphere.

Apparatus for removing particulate matter and gaseous pollutants from a polluted gas stream comprising, a collection chamber housing that is open from end to end and provides for maintaining a plurality of essentially parallel filter beds each extending across said housing interior and spaced apart from one another, said housing including an inlet transition section secured across one end, opposite to a first filter bed of a plurality of filter beds, said inlet transition section having an open end that mounts to said housing end and slopes inwardly to connect to a polluted gas stream inlet line, and a vent opening arranged in said housing opposite end that connects to a gas vent line;

means for providing and injecting a flow of electrostatically charged sorbent particles into a pipe carrying said polluted gas stream, upstream from said inlet transition section;
at least said first filter bed of said plurality of filter beds is a moving bed that includes spaced apart parallel forward and backside plates that are punched to provide a number of openings for freely passing the gas stream therethrough;
a supply of filter bed media material;
inlet means for feeding said filter bed media material selected for its absorbed characteristics for removing agglomerized sorbent and pollution particles and gases from the polluted gas stream, said media material passed into the spaced between said forward and backside plates falling therethrough and is discharged from an outlet valve means, said outlet valve means for operating so as to maintain a pressure less than atmosphere within the housing and prevents the infiltration of outside air;
means for sensing a pressure differential across said moving bed for controlling operation of said outlet valve means to change the media material in said moving filter bed;
and a static filter bed arranged as a last filter bed in said plurality of filter beds and includes a bed of stationary media material maintained between forward and backside plates that include a number of holes formed therethrough.

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Facts

Application

07/075,957Filed 14 Jun 1993

Granted

3 May 1994

Term ends

Not estimatedThe source records don’t support an estimate.

Classification19 codes

B03C 3/145
Characterised by the additional use of mechanical effects, e.g. gravity: inertia
B01D 46/32
Particle separators, e.g. dust precipitators, using loose filtering material: the material moving during filtering
B01D 50/00
Combinations of methods or devices for separating particles from gases or vapours
B01D 53/08
With moving adsorbents, e.g. rotating beds: according to the "moving bed" method

Abstract

Claims13