METHOD AND PLANT FOR PROCESSING OF CELLULOSE PLANT BLACK LIQUOR Russian patent published in 2015 - IPC D21C3/00 

FIELD: process engineering.

SUBSTANCE: invention relates to processing of black liquor of cellulose plant for extraction of chemicals and power contained therein. Proposed process comprises feed of black liquor into pyrolysis reactor with, in fact, no oxygen space. Sand heated in boiler with fluidised bed is fed into said reactor to gasify said black liquor so that gaseous components and soli matter are formed. Gaseous components formed in pyrolysis reactor are directed for recovery. Sand is separated from solid matter formed in pyrolysis reactor and returned back into boiler with fluidised bed. Water is added to remained solid matter to dilute soda contained in solid substance. Formed soda-water solution is returned to cellulose coking and remained solid coal to boiler with fluidised bed. This plant comprises the boiler with fluidised bed, pyrolysis, sand feeder, means to direct gaseous components, sand separator from solid matter, means to return separated sand, mixing reactor, means to return soda-water solution to cooking process and remained solid coal to boiler with fluidised bed.

EFFECT: extraction of chemicals and power in one cycle, increased volume of formed gases.

31 cl, 4 dwg