Combustion of black liquid and processing of lime sludge in a re

Details Combustion of black liquid and processing of lime sludge in a re Combustion of black liquid and processing of lime sludge in a re

1997-11-10

1999-07-13

Silverman, Stanley S.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 3011, D21C 1112

Patent

active

059221720

ABSTRACT:
A method of modifying the course of combustion when evaporated black liquor is burnt in the furnace cavity of a recovery boiler is described. The method implies that lime sludge is supplied to the furnace cavity whereby the course of combustion is modified so that the temperature in the furnace cavity is raised. Also use of a recovery boiler for simultaneous combustion of black liquor and processing of lime sludge is described. In one embodiment of this use is disclosed that the processing of lime sludge is performed so that increased formation of calcium sulphide in the smelt of inorganic chemicals, which is formed in the recovery boiler, is obtained and/or so that the lime sludge is calcined.

REFERENCES:
patent: 1560900 (1925-04-01), Drewsen
patent: 1743080 (1930-01-01), Bradley et al.
patent: 3366535 (1968-01-01), Cann
patent: 4322266 (1982-03-01), Nelson
patent: 4507172 (1985-03-01), Steltenkamp
J. N. Stephenson, "Preparation & Treatment of Wood Pulp", vol. 1., p. 423, Aug. 1950.
Chemical Abstracts, vol. 69, 1968, pp. 1112-1113, item No. 11540.

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