Feedwater preheat corrosion control system

Details Feedwater preheat corrosion control system Feedwater preheat corrosion control system

1978-01-23

1979-11-13

Sprague, Kenneth W.

Liquid heaters and vaporizers

Plants

Feed water heaters

122412, 122421, F22D 102

Patent

active

041739493

ABSTRACT:
An improved arrangement for preheating feedwater in a steam boiler system prior to the feedwater entering a fuel economizer in order to prevent corrosion due to condensation of flue gas in the fuel economizer and in the exhaust of the boiler system. The feedwater, prior to entering the fuel economizer, is heated in a preheater with a portion of steam from a boiler. The amount of steam entering the preheater is regulated by two temperature control valves. A first temperature control valve is regulated by the temperature of the feedwater prior to entering the fuel economizer. A second temperature control valve is regulated by the temperature of the flue gas in the boiler exhaust stack.

REFERENCES:
patent: 3910236 (1975-10-01), Merritt, Jr.
patent: 4089304 (1978-05-01), Beckmann

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