Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1993-04-15
1994-03-29
Yuen, Henry C.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
266 44, 266262, 432 11, 432121, F27B 916
Patent
active
052979598
ABSTRACT:
A high temperature, low NO.sub.x industrial furnace uses coal-fired burners placed in an arcuate heat track conduit which heats an arcuately configured wall member extending through an opening in the heat track conduit. The heated portion of the wall member rotates out of the heat track conduit to indirectly heat a bundle or bank of heat exchange tubes while an unheated wall portion moves into the opening vacated by the heated wall portion. The regenerative heated wall member thus permits the heat exchange tube bundle to be heated to high temperature without exposure to the burner products of combustion. The coal-fired burners are operated substoichiometrically to produce combustibles and a free-standing, jet entrainment arrangement is utilized to achieve staged combustion to avoid NO.sub.x formation.
REFERENCES:
patent: 3782883 (1974-01-01), Nesbitt et al.
patent: 3819323 (1974-06-01), Hemsath et al.
patent: 3836320 (1974-09-01), Nemsath et al.
patent: 4906183 (1990-03-01), Kyffin et al.
patent: 5052921 (1991-10-01), Hemsath
Indugas, Inc.
Nawalanic Frank J.
Yuen Henry C.
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