Four-effect vacuum energy-saving evaporative crystallization system for high-concentration saline wastewater

Abstract

A four-effect vacuum energy-saving evaporative crystallization system for high-concentration saline wastewater comprises a material storage tank, a feeding pump, a plate heat exchanger, a single-effect heater, a single-effect evaporative crystallizer, a double-effect heater, a double-effect evaporative crystallizer, a triple-effect heater, a triple-effect evaporative crystallizer, a quadruple-effect evaporative crystallizer, a surface cooler, a slurry barrel, a centrifuge, a crystal collection tank, a mother liquid storage tank, and a mother liquid pump. The four-effect vacuum energy-saving evaporative crystallization system for high-concentration saline wastewater is characterized in that the material storage tank is sequentially connected to the feeding pump, the plate heat exchanger, the single-effect heater, the single-effect evaporative crystallizer, the double-effect heater, the double-effect evaporative crystallizer, the triple-effect heater, the triple-effect evaporative crystallizer, the quadruple-effect heater, the quadruple-effect evaporative crystallizer, the surface cooler, the slurry barrel, the centrifuge, the crystal collection tank, the mother liquid storage tank, and the mother liquid pump. The four-effect vacuum energy-saving evaporative crystallization system for high-concentration saline wastewater is low in comprehensive power consumption, and the quality of evaporative crystallization product industrial salt reaches the level 2 standard requirement of refined salt provided in the national industrial salt standard (GBT542-2003).

Description

technical field [0001] The invention relates to an evaporation crystallization system, in particular to a four-effect vacuum energy-saving evaporation crystallization treatment system for high-concentration saline waste water. Background technique [0002] At present, the intermittent crystallization process in cooling crystallization accounts for more than 95% of all domestic industries. The labor productivity is low, mainly due to manual operation, and the product quality cannot be guaranteed. It is prominent, needs to be cleaned frequently, and the labor intensity is high. Users do not welcome it. What is more important is that the product has a fine particle size (some such as flour), and it is difficult to dehydrate. The agglomeration seriously affects the quality of the product. Contents of the invention [0003] Aiming at the above problems, the present invention provides a four-effect vacuum energy-saving evaporation and crystallization treatment system for high-co...

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Problems solved by technology

[0002] At present, the intermittent crystallization process in cooling crystallization accounts for more than 95% of all domestic industries. The labor productivity is low, mainly due to manual operation, the product quality cannot be guaranteed, the comprehensive energy consumption is high, the corrosion is large, and the phenomenon of pipe plugging and scarring It is prominent, needs to be cleaned frequently, and the labor intensity is high. Users do not welcome it. The more important thing is that the product has a fine particle size (some are like flour), and it is difficult to dehydrate. The agglomeration seriously affects the quality of the product.

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