METHOD AND DEVICE FOR PROCESSING LIQUID FLOWS ON PULP MILL Russian patent published in 2017 - IPC D21C11/00 

FIELD: technological processes.

SUBSTANCE: method of processing liquid flows on a pulp mill, wherein the device includes a wood preparation unit, an unbleached pulp production unit in which the cooking, washing, sorting and oxygen delignification stages are carried out to produce cellulose pulp, a bleaching unit for bleaching the resulting cellulose pulp, a chemical recovery unit, a pulp-drying machine, a recovery boiler generating boiler blowdown water, an evaporating unit generating condensate, a sewage treatment plant and a water treatment plant. The method includes directing water from at least one of the following sources: alkali filtrate of EOP-bleach filtrate (alkaline extraction using oxygen and peroxide) from the bleaching unit, water from the second settler of the sewage treatment plant, to at least one of the following stages: the preparation of wood in the wood preparation unit, as water for irrigation of the gravitation table of the sewage treatment plant.

EFFECT: improvement of the method.

12 cl, 2 dwg