Burner control system

Details Burner control system Burner control system

1980-02-11

1982-02-16

Favors, Edward G.

Combustion

Timer, programmer, retarder or condition responsive control

By combustion or combustion zone sensor

236 15E, F23H 500

Patent

active

043157300

ABSTRACT:
The fuel supply to a boiler (11) is controlled by a fuel valve (17) driven by a motor (18) in response to measured steam pressure at (12) in relation to a demanded pressure. The motor (18) adjusts at the same time a damper (36) for supplying combustion air at (13). Air supply at (13) can also be controlled in response to the pressure drop across a register (38) as measured by airlines (51). The invention provides an over-riding control in response to too much or too little oxygen in the exhaust gases in the stack (15). The oxygen level is measured by a detector (26), and if it is outside limits set at (29) a motor (41) operates a valve (42) connected between the airlines (51). A timer with a contact T1 ensures that the control in response to oxygen level is only operative for a small part of each of a number of repeated 10 second cycles.

REFERENCES:
patent: 3404836 (1968-10-01), Hickam
patent: 3503553 (1970-03-01), Schomaker
patent: 3519254 (1970-07-01), Putnam
patent: 3723047 (1973-03-01), de Livois
patent: 4097218 (1978-06-01), Womack
patent: 4150939 (1979-04-01), Hayes

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