MVR treatment system and method for high-salt wastewater containing sodium acetate and sodium chloride

Abstract

The present application relates to a kind of MVR processing system and method of high-salt wastewater containing sodium acetate and sodium chloride, belong to high-salt wastewater treatment technical field, including the following preparation steps: S1, MVR evaporation stage: high-salt wastewater is added to MVR evaporator and is evaporated, and evaporation liquid is obtained;S2, first crystallization leaching stage: evaporation liquid is cooled and crystallized, and first mother liquor and first crystal are obtained, and the first crystal that is separated out is filtered and leached, and sodium chloride is obtained, and the first leaching liquid after filtration and leaching is transported to MVR evaporator;S3, second crystallization leaching stage: first mother liquor is diluted with water and cooled and crystallized, and second crystal and second mother liquor are obtained, and the second crystal that is separated out is filtered and leached, and sodium acetate trihydrate is obtained, and second mother liquor and the second leaching liquid after filtration and leaching are transported to MVR evaporator.The present application realizes the continuous separate separation of two salt divisions of sodium acetate and sodium chloride, reduces the discharge of waste mother liquor, and meets the concept of energy saving and carbon reduction in the industry.

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