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

A technology of three-effect evaporation and potassium chloride, which is applied in the field of salt chemical industry, can solve problems such as resource loss, achieve the effects of improving yield and quality, increasing bitter salt particles, and increasing product added value

Pending Publication Date: 2021-03-12
天津长芦汉沽盐场有限责任公司
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  • Abstract
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  • Claims
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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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  • Bittern mixing method for producing potassium chloride by triple-effect evaporation

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Embodiment Construction

[0018] In order to further understand the invention content, characteristics and effects of the present invention, the following embodiments are enumerated hereby, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0019] The flow chart of the device of the present invention is as attached figure 1 shown by figure 1 It can be seen that the device of the present invention includes a sequentially connected one-effect evaporator 1, two-effect evaporator 2, and three-effect evaporator 3, including a thick brine preheater 9 and a bittern bittern preheater 10, and the bittern bittern preheater 10 is connected to The bittern bittern inlet 13, the outlet is connected with the three-effect evaporator 3, the thick brine preheater 9 is connected with the thick brine inlet 12, and the outlet is connected with the two-effect to one-effect clear liquid pipeline. The second-effect evaporator 2 is connected with the first-effect evaporator 1 through the...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/04
CPCC01D3/04
Inventor 赵志伟刘润生唐广亮刘瀚阳张子山
Owner 天津长芦汉沽盐场有限责任公司
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