Sonic spray of H.sub.2 SD.sub.4 in a swirling heated air stream

Details Sonic spray of H.sub.2 SD.sub.4 in a swirling heated air stream Sonic spray of H.sub.2 SD.sub.4 in a swirling heated air stream

1978-10-27

1980-06-17

Yudkoff, Norman

Gas separation

Means within gas stream for conducting concentrate to collector

55 92, 55238, 239102, 239405, 261 79A, 4232155, B03C 300

Patent

active

042081920

ABSTRACT:
In order to reduce the electrical resistance of entrained fine particles of fly ash resulting from the burning of low sulfur coal and to enhance the efficiency of their collection by an electrical precipitator means, there is a conditioning of the particles carried in the flue gas stream by having a vapor of H.sub.2 SO.sub.4 condensed and adsorbed on the particles themselves. Sulfuric acid at ambient temperature is mixed with air in an acoustic nozzle to form a mist having an average particle size of about 10 microns which is injected uniformly into a cyclonically flowing stream of hot gas in a chamber located adjacent an upstream inlet duct portion of the precipitator unit. The hot gas in the chamber vaporizes the acid which is then injected into the precipitator inlet duct so that the acid can condense on the particles. The hot gas is preferably obtained from the combustion air preheater.

REFERENCES:
patent: 1441713 (1923-01-01), Prosser
patent: 3704569 (1972-12-01), Hardison et al.
patent: 3724180 (1973-04-01), Morton et al.
patent: 3860401 (1975-01-01), Clark et al.
patent: 4058372 (1977-11-01), Delamater
patent: 4070424 (1978-01-01), Olson et al.

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