Combustion – Process of combustion or burner operation – Starting or shutdown procedure
Patent
1982-04-27
1984-04-17
Tapolcai, William E.
Combustion
Process of combustion or burner operation
Starting or shutdown procedure
236 15E, 236 45, 431 20, 431 76, F23N 300, F23N 500
Patent
active
044431813
ABSTRACT:
A draft control system for furnaces comprises an auxiliary channel in communication both with ambient air and the flue of the furnace, a main draft control means for regulating the entrance of ambient, auxiliary draft air into the flue, and auxiliary draft control means mounted in the auxiliary channel for dampening the effect of extreme changes in external conditions on the main draft control means. Thus, uniform draft and efficient combustion is maintained in the furnace under a wide variety of conditions. The main draft control means comprises counter-balanced draft control plates which are initially set in an open position so that they can either open or close in order to efficiently regulate the draft in the flue. The auxiliary draft control means comprises, in one embodiment, an isolation damper plate rotationally mounted in the auxiliary channel, or, in a second embodiment, a set of louvred panels. The position of the auxiliary draft control means is automatically regulated by a pneumatic control device responsive to the efficiency of furnace combustion.
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