High-performance flue-gas desulfurization process

Details High-performance flue-gas desulfurization process High-performance flue-gas desulfurization process

1992-01-16

1993-09-21

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

42324309, C01B 1700, C01B 1722

Patent

active

052466787

ABSTRACT:
A desulfurization process which comprises the steps of bringing a combustion exhaust gas into contact with a gypsum slurry containing 1% or less of calcium carbonate in a first absorption tower, and then bringing the combustion exhaust gas into contact with a gypsum slurry containing 1% or more of calcium carbonate in a second absorption tower. SO.sub.x can be removed from a combustion exhaust gas with a high efficiency in accordance with a wet lime/gypsum method.

REFERENCES:
patent: 4040803 (1977-08-01), Atsukawa et al.
patent: 4374812 (1983-02-01), Atsukawa et al.
patent: 4614645 (1986-09-01), Yoneda et al.
patent: 4696804 (1987-09-01), Shinoda et al.
patent: 5034028 (1991-07-01), Ukawa et al.

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