Flue gas desulfurization process

Details Flue gas desulfurization process Flue gas desulfurization process

1993-03-09

1995-07-18

Zimmerman, John

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

42324304, 42324308, 4232431, 4232423, B01D 5350

Patent

active

054339367

ABSTRACT:
A flue gas desulfurization process which comprises the steps of absorbing and separating sulfur oxides from a combustion waste gas using a Ca compound and, as an absorption auxiliary agent, an organic acid which has carboxyl groups at opposite ends of a straight-chain hydrocarbon containing from 1 to 4 carbon atoms in a flue gas desulfurization apparatus, separating the waste water discharged from the desulfurization apparatus in an electrodialyzer which comprises an alternate array of univalent selective anion-exchange membranes and cation-exchange membranes into two solutions: a concentrated solution in which metallic and chlorine ions are concentrated and a dilute solution in which the metallic and chlorine ions are diluted and the organic acid is left behind, and then recycling the dilute solution as an absorbent to the flue gas desulfurization apparatus.

REFERENCES:
patent: 4203954 (1980-05-01), Asanagi
patent: 4629545 (1986-12-01), Mani et al.
patent: 4802966 (1989-02-01), Aoki et al.
patent: 4891195 (1990-01-01), Lin

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