Process heater control

Details Process heater control Process heater control

1984-11-14

1986-03-11

Favors, Edward G.

Liquid heaters and vaporizers

Automatic control of fluid fuel and water

Once through

236 14, 236 15E, F22B 3742, F22D 500

Patent

active

045747466

ABSTRACT:
A method for controlling a process heater in which a required heat demand is computed based on the enthalpy of the feed stock and the desired enthalpy of the final product, and then used as a feedforward portion of the fuel control. A second embodiment of the invention is based on the assumption that the feed stock enthalpy changes slowly or infrequently. In this embodiment fuel heating value changes are used as a feedforward portion of the fuel control.

REFERENCES:
patent: 3417737 (1968-12-01), Shinskey et al.
patent: 3774396 (1973-11-01), Borsi et al.
patent: 3877636 (1975-04-01), Sato
patent: 4253404 (1981-03-01), Leonard
patent: 4457266 (1984-07-01), La Spisa

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