UNIT FOR PRODUCING COAL-WATER FUEL FROM BROWN COAL Russian patent published in 1995 - IPC

FIELD: producing coal fuel. SUBSTANCE: unit has a device for wet grinding of coal, a classifier, a main exchanger for pressure heating the suspension, a complementary heat exchanger, a mixer, a mixer for the suspension degassing and cooling, a thickening tank for obtaining a finished product in it. Both the main and the complementary heat exchangers have the form of helical tubular units, each comprised of an inner tube for a heating medium and a helical channel for a heated medium. The inner tube of the complementary heat exchanger communicates with the source of the heating medium. The inlet to the helical channel of the complementary heat exchanger communicates with the outlet from the helical channel of the main heat exchanger. The outlet from the helical channel of the complementary heat exchanger communicates with the inner tube of the main heat exchanger. The outlet of the main heat exchanger is connected to the thickening tank via a throttle and the mixer. EFFECT: reduced heat energy costs. 1 dwg