Heating – Work chamber having heating means – Combustion products heat work by contact
Patent
1990-05-15
1991-10-15
Yuen, Henry C.
Heating
Work chamber having heating means
Combustion products heat work by contact
432180, 432181, 432102, 431 11, F27D 1700
Patent
active
050570102
ABSTRACT:
A method of operating an industrial furnace, the steps that include providing a process heating zone containing heat exchange tubing for flowing process fluid through the zone; providing first and second fuel combustion zones, and first and second heat regeneration zones; during a first time interval flowing a first stream of air through the first regeneration zone to be preheated therein, flowing the preheated air stream to the first combustion zone to support combustion of fuel therein producing a flame and hot combustion gases, transferring heat from the flame and the hot gases to the heat exchange tubing in the process heating zone, and then flowing the hot gases to the second heat regeneration zone for extracting heat from the gases at the second regeneration zone; and during a second time interval flowing a second stream of air through the second regeneration zone to be preheated therein, flowing the second preheated air stream to the second combustion zone to support combustion of fuel therein producing hot combustion gases, transferring heat from the hot gases to the heat exchange tubing in the process heating zone, and then flowing the hot gases to the first heat regeneration zone for extracting heat from the gases at the first regeneration zone; and repeating the air flow steps, alternately.
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Haefliger William W.
Yuen Henry C.
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