Continuous vacuum crystallization device with flash vaporization and cooling

Abstract

The invention provides a continuous vacuum crystallization device with flash vaporization and cooling. The apparatus comprises the following components: a raw material storage tank, a raw material pump, a self-evaporator, a number one vacuum crystallizer, a number two vacuum crystallizer, a number three vacuum crystallizer, a hydrocyclone, a slurry barrel, and a centrifuge. The device is characterized in that: the raw material storage tank is connected to the raw material pump, the self-evaporator, the number one vacuum crystallizer, the number two vacuum crystallizer, the number three vacuum crystallizer, the hydrocyclone, the slurry barrel, and the centrifuge in order; the top part of the self-evaporator is connected to a number one surface cooler by a pipeline, the number one surface cooler is connected to a liquid ring vacuum pump by a pipeline, the liquid ring vacuum pump is connected to a number one steam-water separator by a pipeline, a slurry outlet of the self-evaporator is connected to a slurry inlet of the number one vacuum crystallizer by a pipeline, and the top part of the number one vacuum crystallizer is provided with a number one steam jet vacuum pump. Compared with periodic crystallization, the comprehensive energy consumption is 40% of the comprehensive energy consumption of the periodic crystallization, crystal size is uniform, and equipment structures are simple; the device is suitable for long-term continuous production without fouling and scabbing.

Description

technical field [0001] The invention relates to an evaporation crystallization device, in particular to a vacuum flash cooling continuous crystallization device. 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, the product quality cannot be guaranteed, and the comprehensive energy consumption is high. The supporting refrigeration system and brine low-temperature water system account for The ground area is large, the power consumption is large, and the corrosion is high. Some of them adopt the freeze crystallization process, and the pipe plugging and scarring are prominent. They need to be cleaned frequently, and the labor intensity is high. flour), dehydration is difficult, and caking has seriously affected the quality of the product. Contents of the invention [0003] Aiming at the above problem...

AI Technical Summary

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, and the comprehensive energy consumption is high. The supporting refrigeration system and brine low-temperature water system account for The ground area is large, the power consumption is large, and the corrosion is high. Some of them adopt the freeze crystallization process, and the pipe plugging and scarring are prominent. They need to be cleaned frequently, and the labor intensity is high. Flour), dehydration is difficult, agglomeration seriously affects the quality of the product

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