Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier
Patent
1985-06-27
1987-10-27
Lacey, David L.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Waste gas purifier
422111, 422171, 422172, 422176, 422183, 422189, 422203, 422229, 423571, 55269, 55337, 55DIG25, C01B 1704
Patent
active
047028939
ABSTRACT:
An apparatus is provided for the elimination of the gaseous pollutants sulfur dioxide and nitric oxide from the emissions of furnaces and smelters, and for the production of two commercial products, liquid sulfur and nitric acid. Two precipitators are operated in series, each containing an annular reaction chamber and a cylindrical separation chamber surrounded by the reaction chamber. The first precipitator combines the furnace or smelter emissions with methane in its reaction chamber in order to reduce the sulfur dioxide in the emissions to sulfur. The emissions are then passed through a tangential duct to the first precipitator's separation chamber where the fine sulfur praticles are converted to liquid sulfur by sending the mixed gases through an involuted spiral baffle and allowing the sulfur particles to coalesce on a trip wire grid. The sulfur particles then melt and fall by gravity to the bottom of the separation chamber, from which point the liquid sulfur is withdrawn. The gaseous emissions then pass from the first precipitator to the reaction chamber of the second precipitator, where they are combined with air and water to change to nitrogen dioxide and then to nitric acid. After passing into the second precipitator's separation chamber, the nitric acid is pumped to the top of the second precipitator's separation chamber and then is concentrated to commercial nitric acid by allowing the acid to descend through a steam jacket in the second precipitator's separation chamber. From the bottom of the second precipitator's separation chamber, the nitric acid is withdrawn as a commercial product from the second precipitator.
REFERENCES:
patent: 2386390 (1945-10-01), Fernelius et al.
patent: 3730691 (1973-05-01), Lang et al.
patent: 3768260 (1973-10-01), Glenn
patent: 3853484 (1974-12-01), Sudar et al.
patent: 4244921 (1981-01-01), Tasior et al.
patent: 4249921 (1981-02-01), Lell et al.
Kirk Clair F.
Kirk Douglas J.
Kirk John W.
Kirk Samuel A.
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