Method and apparatus for conditioning flue gas with a mist of H.

Details Method and apparatus for conditioning flue gas with a mist of H. Method and apparatus for conditioning flue gas with a mist of H.

1976-09-21

1978-01-24

Nozick, Bernard

Gas and liquid contact apparatus

With external supply or removal of heat

Heat producer

55 5, 55 10, 55 15, 55122, 239124, 239127, 239135, 239426, 239591, 261 36R, 261 78A, 261DIG48, 261116, 423522, F02M 1504

Patent

active

040704246

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 very fine mist of H.sub.2 SO.sub.4 condensed and adsorbed on the particles themselves. Sulfuric acid is mixed with air in an acoustic nozzle to form a mist having a mean particle size of less than 10 microns which is injected uniformly into the flue gas stream at a zone ahead of the precipitator unit so that the acid can condense on the particles. The acid is preferably transported through the apparatus at ambient temperature and then heated just prior to injection to a temperature less than its vaporization temperature.

REFERENCES:
patent: 2010926 (1925-08-01), Osterman
patent: 2591157 (1952-04-01), Hutchinson
patent: 2602734 (1952-07-01), Hedberg et al.
patent: 2722456 (1955-11-01), Glessner
patent: 3034771 (1962-05-01), Harris
patent: 3061198 (1962-10-01), Kerr et al.
patent: 3240254 (1966-03-01), Hughes
patent: 3363398 (1968-01-01), Wheatoroff et al.
patent: 3665576 (1972-05-01), McKewen
patent: 3686825 (1972-08-01), Busby
patent: 3763634 (1973-10-01), Allisen

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