Natural draft combustion zone optimizing method and apparatus

Details Natural draft combustion zone optimizing method and apparatus Natural draft combustion zone optimizing method and apparatus

1980-03-03

1981-03-03

Favors, Edward G.

Furnaces

With control means responsive to a sensed condition

Feed control

122448S, 236 15E, 431 13, 431 90, F23N 518

Patent

active

042534046

ABSTRACT:
Control method and apparatus for optimizing the operation of a natural draft combustion zone through which a conduit containing a process fluid to be heated passes, by decreasing the supply of combustion air until one or more of the following predetermined limiting conditions is reached: maximum CO in the flue gas, minimum O.sub.2 in flue gas, minimum draft in the combustion zone, maximum temperature of the outer surface of said conduit, and increase in the rate of fuel addition above a minimum amount. When a limiting condition is reached, the supply of combustion air is increased until the limiting condition is no longer present, and the cycle then repeated.

REFERENCES:
patent: 3074644 (1963-01-01), Geniesse
patent: 3184686 (1965-05-01), Stanton
patent: 3243116 (1966-03-01), Dijt et al.
patent: 3723047 (1973-03-01), De Livois
patent: 4097218 (1978-06-01), Womack
patent: 4147500 (1979-04-01), Karlsoen
Improving the Efficiency of Industrial Boilers by Microprocessor Content, Takacs, Power 121, 11, 80-83, (1977).

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