FIELD: inorganic compounds technologies.
SUBSTANCE: invention relates to fluidized-bed manufacture of granulated calcium chloride from solution. Process comprises providing concentrated calcium chloride solution dehydration and crystallization thereof to form granules in fluidized-bed furnace by way of feeding solution into furnace in countercurrent to furnace gas produced by combustion of natural gas with air in combustor. Granules are then cooled and emission gas dust is trapped and returned into the solution concentration stage. According to invention, concentrated solution, prior to be fed into fluidized-bed furnace, is preheated by furnace gas by circulation of solution in the tank-pump-heater system. Finished product, prior to be cooled, is divided into two portion. One portion is sent to calcium chloride concentration stage and resulting mixture is circulated in the tank-pump-heater system, whereas the other portion is used to cool finished product.
EFFECT: increased productivity of calcium chloride granulation process and installation.
12 cl, 1 dwg
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Authors
Dates
2005-08-10—Published
2003-10-08—Filed