Method for desulfurizing exhaust smoke

Details Method for desulfurizing exhaust smoke Method for desulfurizing exhaust smoke

1991-06-25

1994-02-08

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204131, 204149, 423235, 4232427, C25B 100

Patent

active

052845575

ABSTRACT:
A method for desulfurizing an exhaust gas containing SO.sub.2 and NO.sub.x in accordance with a wet lime process, the aforesaid desulfurizing method being characterized by comprising the steps of drawing a part of an absorbing slurry, subjecting a filtrate obtained by the solid-liquid separation of the drawn absorbing slurry to an electrolysis treatment in the presence of chlorine ions, or after adjusting the filtrate to pH 3-4, mixing a hydrochlorite with the filtrate, and then refeeding the filtrate as a make-up water to an absorbing tower.

REFERENCES:
patent: 4425313 (1984-01-01), Cooper
patent: 4670234 (1987-06-01), Holter et al.
patent: 4687649 (1987-08-01), Kuroda et al.
patent: 4925639 (1990-05-01), Stauffer
patent: 5009869 (1991-04-01), Weinberg et al.
Japanese Patent Abstracts Unexamined, Section Ch, Week 9040, Nov. 14, 1990, class J, p. 3, Abstract No. 90-300720/40.

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