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Title: Heat transfer mechanism with thin filaments including ceramic high temperature heat exchanger

A radiative heat transfer mechanism in a furnace having burners through which pulverized coal and air are burned producing combustion gases and contaminants. A plurality of elongated conduits are positioned inside the furnace proximate to the burners generally parallel to the flow of combustion gases in the furnace. A plurality of thin filaments are inside each of the elongated hollow conduits, the filaments having diameters in the range of from about 1 micrometer to about 1,000 micrometers and having an infrared radiation cross-section sufficient to cause the filaments to heat upon exposure to infrared radiation. Blower mechanism is associated with the elongated conduits for limiting the amount of soot and ash which deposit on the conduits to preserve the radiative and convective transfer of heat energy from the combustion gases to the conduits.
Inventors:
 [1];  [2]
  1. (Naperville, IL)
  2. (Burr Ridge, IL)
Issue Date:
OSTI Identifier:
869556
Assignee:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5355843
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
heat; transfer; mechanism; filaments; including; ceramic; temperature; exchanger; radiative; furnace; burners; pulverized; coal; air; burned; producing; combustion; gases; contaminants; plurality; elongated; conduits; positioned; inside; proximate; parallel; flow; hollow; diameters; range; micrometer; 000; micrometers; infrared; radiation; cross-section; sufficient; exposure; blower; associated; limiting; amount; soot; ash; deposit; preserve; convective; energy; radiative heat; positioned inside; heat energy; pulverized coal; heat exchange; heat exchanger; heat transfer; infrared radiation; combustion gases; combustion gas; temperature heat; transfer mechanism; including ceramic; hollow conduit; /122/165/