Process for treating waste sludge from combustion plant desulfur

Details Process for treating waste sludge from combustion plant desulfur Process for treating waste sludge from combustion plant desulfur

1976-11-24

1978-08-22

Dean, R.

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

106110, 423242, 423555, 61 35, C04B 1100

Patent

active

041086775

ABSTRACT:
Aqueous alkaline desulfurization treating units for combustion gases generate as a product an aqueous sludge containing sulfur compounds of calcium. Many such sludge products contain more than 30 percent by weight (of the solids) of calcium sulfite hemihydrate. These waste products are in part calcined at a temperature from 250.degree.C to 650.degree.C to produce a moisture-free, cementitious product which is thereafter recombined with uncalcined aqueous sludge to produce a cementitious product which can be profitably utilized or which may be conveniently discarded as a landfill. If desired, fly ash or bottom ash produced in the combustion process can be combined with the cementitious product.

REFERENCES:
patent: 2090142 (1937-08-01), Nonhebel et al.
patent: 3855391 (1974-12-01), Selmeczi et al.
patent: 3920795 (1975-11-01), Selmeczi et al.
"The Merck Index", 8th ed., 1968, p. 196.
"Handbook of Chemistry and Physics", The Chemical Rubber Co., 46th edition, p. B-164.

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