Evaporative crystallization system

Abstract

The invention relates to the technical field of coal chemical industry wastewater treatment, and discloses an evaporative crystallization system which comprises an evaporator and a solid-liquid separator, the evaporator is provided with a salt collecting chamber, a first crystal slurry outlet and a slurry turning opening, the first crystal slurry outlet and the slurry turning opening communicate with the salt collecting chamber, and the solid-liquid separator is provided with a first crystal slurry inlet, a first mother liquor outlet and a crystallized salt outlet. A first crystal slurry inlet of the solid-liquid separator communicates with a first crystal slurry outlet of the evaporator, the solid-liquid separator is used for separating crystalslurry entering the solid-liquid separator into mother liquor and crystal salt, and the first mother liquor outlet communicates with the slurry turning opening to be used for introducing the separated mother liquor into the salt collecting chamber so as to disturb crystal slurry in the salt collecting chamber. The evaporative crystallization system has the function of preventing blockage caused by deposition and hardening of salt particles at the bottom of the salt collecting chamber.

Description

technical field [0001] The invention relates to the technical field of coal chemical wastewater treatment, in particular to an evaporation crystallization system. Background technique [0002] Now the new coal chemical industry takes large-scale coal gasification as the leader to produce clean energy and replace petrochemical products. However, high water consumption and high pollution in the production process of coal chemical industry have always been the bottleneck of coal chemical industry. The discharge of wastewater from coal chemical industry into the environment will cause great harm to the ecological environment, and in the case of severe water shortage, the development of my country's coal chemical industry has also been greatly hindered, so the recovery of coal chemical wastewater is very important . [0003] The "zero discharge" of coal chemical wastewater is to treat the organic wastewater and saline wastewater generated in the process of the enterprise process,...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the low crystallization efficiency of the evaporative crystallizer in the prior art, the discharge port is easy to block, the crystallized salt particles are easy to deposit and harden at the bottom, it is difficult to increase the production output, and the problem of energy consumption in the crystallization process is increased. , to provide an evaporative crystallization system, the evaporative crystallization system has the function of preventing the blockage caused by the deposition and hardening of granular salt at the bottom of the salt collection chamber

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