Waste heat recovery boiler

Details Waste heat recovery boiler Waste heat recovery boiler

1988-03-02

1989-01-24

Favors, Edward G.

Liquid heaters and vaporizers

Industrial

Waste heat

122 1C, 122420, 165 13, F22D 100

Patent

active

047994614

ABSTRACT:
A waste heat recovery boiler comprising heat exchange rate switching means for controlling the rate of heat exchange between an exhaust gas and feedwater in a heat exchanger by changing the state of the feedwater in accordance with the concentration of sulfur oxides in the exhaust gas, thereby maintaining the temperature at which low temperature corrosion due to the exhaust gas is prevented in a downstream portion of the heat exchanger in the direction in which the exhaust gas flows. Accordingly, it is possible to achieve the maximum efficiency of heat recovery since the phenomenon of steaming in the heat exchanger is eliminated irrespective of whether the kind of exhaust gas is a dirty gas or a clean gas.

REFERENCES:
patent: 4489679 (1984-12-01), Holt
patent: 4491093 (1985-01-01), Hoekstra
patent: 4572110 (1986-02-01), Haeflich
patent: 4660511 (1987-04-01), Anderson

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