Combustion exhaust gas treatment system

Details Combustion exhaust gas treatment system Combustion exhaust gas treatment system

1996-01-26

2000-09-05

Kastler, Scott

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

423510, B01D 5000

Patent

active

061138630

ABSTRACT:
Five combustion exhaust gas treatment systems capable of removing dust and selenium (Se) in combustion exhaust gas and making harmless are proposed: (1) combustion exhaust gas is cooled to 350.degree. C. or less, dust is separated, Se is transformed into insoluble compound, and Se is separated; (2) combustion exhaust gas is cooled to 350.degree. C. or less, dust is separated, Se elution preventive agent is added, and dust is formed into scale; (3) dust in combustion exhaust gas is collected by dust collector, dust is formed into slurry by making use of part of circulation liquid in desulfurization apparatus, and tetravalent Se in dust slurry is transformed into insoluble compound, which is separated into solid and liquid; (4) dust is separated from combustion exhaust gas by dust collector, and it is heated to gasify Se, and is led into desulfurization apparatus, etc., and formed into slurry, and Se is made into insoluble compound; and (5) a treating agent for making tetravalent Se insoluble is added to part of circulation liquid in desulfurization apparatus, and it is sprayed into combustion exhaust gas to make Se insoluble.

REFERENCES:
patent: 3966889 (1976-06-01), Kakuta et al.
Evzmetall. vol. 30, No. 12, Dec. 1977 pp. 555-558, XP002008799.

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