Anticipatory boiler feedpump suction head controller system

Details Anticipatory boiler feedpump suction head controller system Anticipatory boiler feedpump suction head controller system

1984-10-25

1985-11-12

Favors, Edward G.

Liquid heaters and vaporizers

Feeders

Automatic

122406S, 122451R, 122451S, F22D 526

Patent

active

045520992

ABSTRACT:
Boiler feedpump net positive suction head (NPSH) control is performed in a heat recovery steam generator including a deaerator inserted between steam turbine condensate and steam boiler. To this effect apparatus is provided responsive to temperature at the output of the deaerator, to fluid flow therefrom, and to temperature at the input of the boiler feedpump for providing a signal representative of the anticipated suction head pressure, and the NPSH margin is derived by comparison with actual pressure to control the pegging valve, or other heat source control to the deaerator.

REFERENCES:
patent: 3166910 (1965-01-01), Brunner
patent: 4207842 (1980-06-01), Kehlhofer
patent: 4290390 (1981-09-01), Juzi
patent: 4497283 (1985-02-01), La Spisa et al.

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