Liquid heaters and vaporizers – Feeders – Automatic
Patent
1983-12-12
1984-12-25
Favors, Edward G.
Liquid heaters and vaporizers
Feeders
Automatic
110186, 110215, 122412, 122420, 122421, 1224512, 236 14, F22D 500
Patent
active
044896794
ABSTRACT:
A once-through steam generator has both radiant and convection sections. The flue gases discharged from the convection section are passed through a wet scrubber to remove both sulfur oxides (SO.sub.x) and particulate matter. The feedwater to the convection section has its temperature controlled by the temperature of the flue gases discharged from the convection section, reducing the temperature of the feedwater by the use of a feedwater exchanger, as the convection section progressively fouls due to particulates in the flue gases. An additional heat exchanger upstream of the feedwater exchanger and convection section which scavenges additional heat from the wet scrubber liquids while the temperature of the flue gases into the scrubber are lowered to a temperature equal to or less than the water dew point temperature of the flue gases entering the scrubber.
REFERENCES:
patent: 3205870 (1965-09-01), Durham et al.
patent: 3693557 (1972-09-01), Makuch
patent: 3774396 (1973-11-01), Borsi et al.
patent: 4031863 (1977-06-01), Laubli
patent: 4241701 (1980-12-01), Morse
patent: 4318366 (1982-03-01), Tompkins
patent: 4418651 (1983-12-01), Wyatt
Combustion Engineering Inc.
Favors Edward G.
Wade Arthur L.
Warner Steven E.
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