Evaporative concentrated crystallization system and evaporation treatment method

Abstract

The invention discloses an evaporative concentrated crystallization system and evaporation treatment method, wherein the evaporative concentrated crystallization system comprises an air heater, an evaporative crystallizer, a fan, a condenser and a connecting pipeline; the air heater, the evaporative crystallizer, the fan and the condenser are communicated through multiple connecting pipelines to form a closed circulating system; the air heater comprises an cold air inlet, a hot air outlet, a heat medium inlet, a heat medium outlet, a heater main body and an air circulation pipeline; the evaporative crystallizer comprises an hot air inlet, a hot air outlet, an evaporated material inlet, a material outlet, an emptying port, a material supplementing port, an evaporation chamber and a circulating pump; a spraying device is further arranged at the top of the evaporation chamber; the condenser condenses surrounding air through a refrigerant medium. The evaporative concentrated crystallization system and the evaporation treatment method provided by the invention avoid the problem of scaling, and further have the technical advantages in multiple aspects, such as simple operation, higher system performance ratio, higher stability, stronger equipment reliability and the like.

Description

technical field [0001] The invention relates to the technical field of evaporation, in particular to an evaporation concentration crystallization system and an evaporation treatment method. Background technique [0002] The existing evaporation technologies are mainly in the form of multi-effect evaporation and steam mechanical recompression. [0003] Among them, multi-effect evaporation is to use the original steam as a heat source to heat the waste water to evaporate the water, and the steam generated by it is used as the heat source of the next stage of evaporation (that is, the heat transfer medium is water), which is carried out in sequence, so as to realize the cascade utilization of energy. To achieve the purpose of energy saving; [0004] Among them, the steam mechanical recompression system means that the steam generated by the evaporator is compressed by a steam compressor to increase its enthalpy, and then the compressed steam is used as a heat source (that is, t...

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Problems solved by technology

[0005] Obviously, the above-mentioned evaporating systems in the prior art all have some objective technical shortcomings: for example: (1) the heat transfer of the existing two kinds of evaporating technologies is all completed by the partition heat transfer, and the partition heat transfer evaporation cannot Avoid the risk of fouling; (2) Multi-effect evaporation has high energy consumption, heavy maintenance and operation tasks, and low system efficiency ratio; the steam mechanical recompression system uses a steam compressor, so the steam generated by the waste liquid evaporation is required to be Contain as few other volatile gases as possible, so as not to reduce the performance of the compressor. Therefore, the waste liquid entering the evaporation system requires a complicated pretreatment system to be used normally.

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