FORCED-CIRCULATION EVAPORATOR FOR ALUMINATE SOLUTIONS Russian patent published in 1997 - IPC

FIELD: equipment for producing alumina and soda products. SUBSTANCE: evaporator has pulp chamber, upflow circulating tube lowered down one fourth of tube diameter to bottom, upflow and downflow heating chambers, circulating pump, boiling tube, and separator. Circulation of crustless pulp through heating tubes of downflow chamber is combined with circulation of fallen coagulated crusts through circulating pump which crushes them; crystals are separated in pulp chamber due to centrifugal forces and upward flow; power requirement for procedure is 1.8 to 2 times as low. EFFECT: provision for eliminating complete clogging of downflow heating tubes, reduced specific power consumption and capital outlays for construction. 2 dwg