Boiler control providing improved operation with fuels having va

Details Boiler control providing improved operation with fuels having va Boiler control providing improved operation with fuels having va

1976-09-03

1977-12-27

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Having condition responsive control

60667, 122448R, F01K 1300

Patent

active

040646998

ABSTRACT:
A boiler control regulates the input fuel and air to satisfy load demand. Simultaneously, the air flow is adjusted by an air flow control to correct for changes in fuel heating value by means of a circuit which operates in response to outlet steam flow and input mass fuel flow to determine the difference in presumed heat input and actual heat output and, by inference from the heat imbalance or error, a change in fuel heating value. The heat error is used to adjust the air flow demand to the air flow control. In another embodiment, boiler heat pickup is derived to remove from the heat imbalance any heat input changes other than fuel heating value changes.

REFERENCES:
patent: 3417737 (1968-12-01), Shinskey et al.
patent: 3545207 (1970-12-01), Barber et al.
patent: 3607117 (1971-09-01), Shaw et al.

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