Double-stage MVR evaporation and crystallization process and equipment
An evaporation crystallization and two-stage evaporation technology, which is applied in the direction of evaporation, multi-effect evaporation, evaporator accessories, etc., can solve the problems of large investment in production technology equipment, complicated process operation and control, and high energy consumption of the process, and achieve simplified process operation and Effect of controlling, reducing process energy consumption and reducing equipment investment
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[0021] In the raw material liquid, the content of dimethyl sulfoxide is 32% by weight, and the sodium nitrate content is 15% by weight, which is desalted, and the dimethyl sulfoxide is recovered and reused. Feed the raw material liquid into the primary evaporator 1 (processing capacity 1500kg / h) through the raw material pipeline, the temperature of the raw material liquid is 57℃, the operating parameters of the primary separation chamber 6 are: evaporation pressure 7kPa, evaporation temperature 98℃; secondary separation chamber 4 The operating parameters are: evaporation pressure 3kPa, evaporation temperature 98°C. In this embodiment, the condensate storage tank 7 collects the dimethyl sulfoxide product that needs to be recovered after desalination.
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