INSTALLATION FOR PRODUCTION OF GRANULAR SODIUM PERCATBONATE Russian patent published in 2005 - IPC

FIELD: chemical industry.

SUBSTANCE: the invention is intended for a chemical industry and may be used in production of bleaching agents and washing agent, household chemical goods. The reactor (1) is fed with soda ash, for example in the form of a solution, through link (7) and hydrogen peroxide solution through link (6)connected with a means of delivery of a stabilizing agent (5). So produced reaction mass is fed through link (22) into the mixer (2). The reactor (1) may be made with a capability of moving along the auger of the mixer (2). Humid granules of sodium percarbonate produced in the mixer (2) are removed through a connecting pipe (9) in a dryer (3) supplied with a gas-distributing lattice (10). One part of the dried granules through a connecting pipe (8) is fed back into the mixer (2), and other part through link (15) is fed into the qualifier (4). A commercial fraction of sodium percarbonate is removed through link (16) into a pneumatic classifier (20). The fine fraction through link (21) and through the cyclone separator (13) and link (14) is fed back into the mixer. The coarse fractions of sodium percarbonate from the qualifier (4) through link (17) is fed into the grinding machine (18). Crushed sodium percarbonate is mixed with the fine fractions and through the cyclone separator (13)and through link (14) is fed back into the mixer (2). The engine of the drive of the grinding machine (18) is supplied with the frequency control unit. The invention allows to reduce the share of a dust faction and losses at drying, to increase the share of active oxygen up to 13.98-14.60 % and stability of the finished product.

EFFECT: the invention ensures reduction of the share of a dust faction and losses at drying, an increase of the share of active oxygen and stability of the finished product.

4 cl, 1 dwg, 1 tbl