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Title: Separation of particulate from flue gas of fossil fuel combustion and gasification

The gas from combustion or gasification of fossil fuel contains flyash and other particulate. The flyash is separated from the gas in a plurality of standleg moving granular-bed filter modules. Each module includes a dipleg through which the bed media flows into the standleg. The bed media forms a first filter bed having an upper mass having a first frusto-conical surface in a frusto-conical member at the entrance to the standleg and a lower mass having a second frusto-conical surface of substantially greater area than the first surface after it passes through the standleg. A second filter media bed may be formed above the first filter media bed. The gas is fed tangentially into the module above the first surface. The flyash is captured on the first frusto-conical surface and within the bed mass. The processed gas flows out through the second frusto-conical surface and then through the second filter bed, if present. The bed media is cleaned of the captured flyash and recirculated to the moving granular bed filter. Alternatively, the bed media may be composed of the ash from the combustion which is pelletized to form agglomerates. The ash flows through the bed only once; it is notmore » recycled.« less
 [1];  [2];  [1]
  1. (Murrysville, PA)
  2. (Pittsburgh, PA)
Issue Date:
OSTI Identifier:
Westinghouse Electric Corporation (Pittsburgh, PA) NETL
Patent Number(s):
US 5653181
Contract Number:
Research Org:
Country of Publication:
United States
separation; particulate; flue; gas; fossil; fuel; combustion; gasification; contains; flyash; separated; plurality; standleg; moving; granular-bed; filter; modules; module; dipleg; bed; media; flows; forms; upper; mass; frusto-conical; surface; entrance; substantially; passes; formed; fed; tangentially; captured; processed; cleaned; recirculated; granular; alternatively; composed; ash; pelletized; form; agglomerates; recycled; filter bed; filter media; gas flows; gas flow; flue gas; fuel combustion; fossil fuel; moving granular; media forms; fuel contains; filter module; bed filter; /110/96/422/