Process for increasing the solids content of black liquor at...

Details Process for increasing the solids content of black liquor at... Process for increasing the solids content of black liquor at...

D - Textiles, Paper

21

C

9/36.6

D21C 11/10 (2006.01)

Patent

CA 1276058

ABSTRACT OF THE DISCLOSURE An improved process is provided for increasing the solids content of black liquor at its recovery in a sulphate pulping process. According to such process, the liquor is first heated at a pressure which is so high that no boiling occurs at the heating temperature. The liquor is then led to a tank where its pressure is released to a value below the saturation pressure of steam at the relative temperature of the liquor, such that water is evaporated, and the solids content of the black liquor is increased to 65% by weight. The liquor thus concentrated can be led to the liquor combustion in the recovery process.

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