Evaporative crystallization apparatus and wastewater treatment system

Abstract

The application relates to an evaporation crystallization device and a wastewater treatment system. The evaporation crystallization device comprises an evaporation crystallization device and a wastewater treatment system; a crystallization separator is communicated with an evaporator and can perform gas-liquid separation on a gas-liquid mixture from the evaporator, so that solutes in a liquid phase are crystallized, and secondary steam is separated; a latent heat recovery device is communicated with the evaporator and the crystallization separator, can be communicated with raw material liquid, and can exchange heat between the secondary steam and the raw material liquid, so as to pre-heat the raw material liquid; the evaporator can heat the pre-heated raw material liquid to boiling by using live steam, so as to form a gas-liquid mixture. The evaporation crystallization device can exchange heat between the secondary steam generated by the crystallization separator and the raw material liquid by arranging the latent heat recovery device, the feeding temperature of the raw material liquid is improved, the live steam consumption of the raw material liquid in the evaporator can be reduced, and the waste of the latent heat of the secondary steam can be avoided; the secondary steam does not need more circulating water for cooling after heat exchange with the raw material liquid, and the energy consumption can be saved.

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