Combustion control for a boiler

Details Combustion control for a boiler Combustion control for a boiler

1984-04-10

1985-02-12

Favors, Edward G.

Liquid heaters and vaporizers

Automatic control of fluid fuel and water

Once through

236 14, F22B 500

Patent

active

044984286

ABSTRACT:
A desired ratio of offgas to fuel gas is maintained for a fuel mixture supplied to the burners associated with a boiler by venting steam as required to insure than all offgas may be combusted while maintained the desired offgas to fuel gas ratio. The venting of steam causes the fuel gas control, which is based on steam pressure, to vary the flow rate of the fuel gas so as to maintain the desired offgas-fuel gas ratio. Control of the combustion process for the boiler in this manner results in total combustion of the offgas without violating process constraints.

REFERENCES:
patent: 3607117 (1971-09-01), Shaw et al.
patent: 3722811 (1973-03-01), Osburn
patent: 3734675 (1973-05-01), Osburn
patent: 4003342 (1977-01-01), Hodgson
patent: 4095930 (1978-06-01), Boyd
patent: 4115862 (1978-09-01), Stewart
patent: 4118172 (1978-10-01), Noir et al.
patent: 4187542 (1980-02-01), Ball et al.
patent: 4309168 (1982-01-01), Prill et al.

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