Method of inhibiting scaling in black liquor evaporators

Details Method of inhibiting scaling in black liquor evaporators Method of inhibiting scaling in black liquor evaporators

1998-02-20

2000-07-18

Manoharan, Virginia

Concentrating evaporators

Processes

Involving waste liquid

159 163, 159 29, 159DIG8, 159DIG20, 159901, 162 29, 162 48, 203 6, 203 7, 210698, B01D 126, B01D 334, D21C 1110, C02F 104

Patent

active

06090240&

ABSTRACT:
A method of inhibiting calcium carbonate scaling in a multi-stage evaporation plant of black liquor by heat-treating calcium-containing liquor includes a first stage wherein the calcium-containing liquor is heated to about 110-145.degree. C. with direct contact with the heating medium; a second stage wherein the liquor is maintained at this temperature in a retention tank for 1-20 minutes to reduce the amount of calcium in the liquor by precipitating calcium carbonate; and a third stage wherein the heat-treated liquor is evaporated for combustion.

REFERENCES:
patent: 4249990 (1981-02-01), Gilbert et al.
patent: 4755258 (1988-07-01), Ryham
patent: 4953607 (1990-09-01), Erkki et al.
patent: 5407583 (1995-04-01), Gill et al.
patent: 5409571 (1995-04-01), Togo et al.
patent: 5562830 (1996-10-01), Zidovec et al.
patent: 5716496 (1998-02-01), Agren
Frederick et al, "Preventing Calcium Carbonate Scaling in Black Liquor Evaporators", Part One of Two, Southern Pulp and Paper Manufacturer/Aug., 1979, pp. 22-24.
Frederick, et al, "Preventing Calcium Carbonate Scaling in Black Liquor Evaporators", Part Two of Two, Southern Pulp and Paper Manufacturer/Sep., 1979, pp. 21-29.

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