Bittern mixing method for producing potassium chloride by triple-effect evaporation

Abstract

The invention discloses a bittern mixing method for producing potassium chloride by triple-effect evaporation, which belongs to the field of salt chemical industry, and comprises the following steps that bittern enters a bittern preheater through a bittern inlet, is preheated by the bittern preheater before effect, enters a triple-effect evaporator, and then is transferred to a double-effect evaporator, the double-effect evaporator discharges part of double-effect salt through an inclined plate settler, and clear liquid is transferred to a single-effect evaporator; thick brine enters the thickbrine preheater through the thick brine inlet, is preheated by the thick brine preheater, then is in butt joint with the second-effect to first-effect clear liquid pipeline, enters the first-effect evaporator together with bittern of the inclined plate settler, and is mixed in the first-effect evaporator. The method has the beneficial effects that (1) the bitter salt particles can be increased byutilizing the characteristics of heating circulation crystallization in the tank, the yield and the quality of salt products are improved, and the additional value of the products is further improved; and (2) the loss of a large amount of finished liquid caused by brine mixing outside the tank and too fine salt particles can be reduced, and the waste of potassium chloride, bromine and magnesium chloride resources in bittern is avoided.

Description

technical field [0001] The invention belongs to the field of salt chemical industry, and adopts a new brine mixing technology in the production of three-effect evaporating potassium chloride, realizes the reduction of potassium chloride band loss, removes more thick brine, and improves the quality of bitter salt. Background technique [0002] Bittern chemical production, that is, the production process of using the mother liquor after salt production to extract potassium chloride, bromine, magnesium chloride and other salinized products in sequence. After the production of potassium chloride, bromine is first extracted from the mother liquor, and finally magnesium chloride is produced to realize the complete digestion of brine and solve the problem of handling the mother liquor (bittern) of salt production. However, part of the bitter salt will be produced by-product in the production process of potassium chloride, and industrial methods are needed processing. [0003] In t...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the deficiencies of the prior art, and provides a new method for converting brine in the three-effect production of potassium chloride, which can effectively solve the problem of resource loss caused by the cash-brine method

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