Furnaces – Refuse incinerator – Refuse suspended in or supported by a fluid medium
Patent
1993-08-18
1994-07-05
Favors, Edward G.
Furnaces
Refuse incinerator
Refuse suspended in or supported by a fluid medium
110211, 110214, 110229, 122 4D, 422142, 422147, 588900, F23G 500
Patent
active
053257979
ABSTRACT:
A staged fluidized-bed combustion and filter system for substantially reducing the quantity of waste through the complete combustion into ash-type solids and gaseous products. The device has two fluidized-bed portions, the first primarily as a combustor/pyrolyzer bed, and the second as a combustor/filter bed. The two portions each have internal baffles to define stages so that material moving therein as fluidized beds travel in an extended route through those stages. Fluidization and movement is achieved by the introduction of gases into each stage through a directional nozzle. Gases produced in the combustor/pyrolyzer bed are permitted to travel into corresponding stages of the combustor/filter bed through screen filters that permit gas flow but inhibit solids flow. Any catalyst used in the combustor/filter bed is recycled. The two beds share a common wall to minimize total volume of the system. A slightly modified embodiment can be used for hot gas desulfurization and sorbent regeneration. Either side-by-side rectangular beds or concentric beds can be used. The system is particularly suited to the processing of radioactive and chemically hazardous waste.
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Halow John S.
Mei Joseph S.
Breeden David E.
Favors Edward G.
Hamel Stephen D.
Moser William R.
The United States of America as represented by the United States
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