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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 is described 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. 7 figs.
Inventors:
;
Issue Date:
OSTI Identifier:
6901031
Assignee:
Univ. of Chicago, IL (United States) PTO; EDB-94-164048
Patent Number(s):
US 5355843; A
Application Number:
PPN: US 8-090766
Contract Number:
W-31109-ENG-38
Resource Relation:
Patent File Date: 12 Jul 1993
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; COMBUSTION; COMBUSTORS; HEAT TRANSFER; BLOWERS; CERAMICS; CLEANING; FIBERS; PULVERIZED FUELS; TUBES; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; ENERGY SOURCES; ENERGY TRANSFER; FOSSIL FUELS; FUELS; MATERIALS; OXIDATION; THERMOCHEMICAL PROCESSES 014000* -- Coal, Lignite, & Peat-- Combustion