METHOD AND APPARATUS FOR EFFICIENT PRODUCTION OF SOLUBLE CELLULOSE ON LINE AT SULPHATE CELLULOSE PRODUCTION, PRODUCING CELLULOSE FOR PAPER, USING COOKING BOILER OF CONTINUOUS ACTION Russian patent published in 2016 - IPC D21C3/02 

FIELD: pulp industry.

SUBSTANCE: method and plant for pulp manufacturing used in a kraft process include vertical reservoir operating under pressure, operating in intermittent mode, boiling vessel of continuous action with one or more tanks and other equipment used for subsequent processing non-bleached sulphate cellulose, for example, for washing, oxygen delignification and bleaching and drying. Feed and transportation system may include a high pressure feed system or direct feed and selectively performs material supply, containing organic fibres, in boiling vessel of continuous action during production of cellulose of lower grade and in vertical reservoir operating under pressure during production of cellulose of higher grade, for example soluble cellulose. Vertical reservoir operating under pressure is used for prehydrolysis and neutralisation, after which obtained pulp is directed to boiling vessel of continuous action for cooking. White liquor and the black liquor from same line can be used as neutralising media.

EFFECT: same boiling vessel of continuous action is selectively used for boiling with respect to production of cellulose of various grades and quality.

50 cl, 12 dwg