Method and system for refining crude brine

A refining method and refining system technology are applied in the field of chlor-alkali salt and its preparation process and equipment system, which can solve the problems of high price of adsorption equipment, huge daily consumption of raw salt, difficult transportation of sea salt, etc. Safe production, excellent and stable brine quality, and the effect of broadening the selection range
CN102120590BInactive Publication Date: 2012-04-25RUYUAN DONGYANGGUANG ELECTROCHEM FACTORY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
RUYUAN DONGYANGGUANG ELECTROCHEM FACTORY
Publication Date
2012-04-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and a system for refining crude brine. The method comprises the following steps of: performing pre-reaction; pressurizing and dissolving gas; pretreating; performing post reaction; filtering by using a membrane; and filtering off residual slag particles by using a membrane filter to obtain the refined brine. By the method and the system for refining crude brine, under the condition of not introducing new impurities, various metal impurity ions are efficiently flocculated and precipitated, so that problems of great mineral salt impurity fluctuation and overproof Fe and Al ions are solved, the high quality of the finished brine product and the high-efficiency and normal operation of subsequent ion-exchange membrane electrolysis can be ensured, and the aim that mineral salt replaces sea salt to serve as chlor-alkali electrolysis raw salt is fulfilled; moreover, brine sludge emission and treatment cost can be obviously reduced, and the method and the system have good emission reduction effect and good environment-friendly property.
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Description

technical field

[0001] The present invention relates to chemical raw material and its preparation, more specifically, the present invention relates to chlor-alkali salt and its preparation process and equipment system. Background technique

[0002] Raw salt, as the main raw material in the chlor-alkali industry, accounts for about 30% of the cost of making alkali. Chlor-alkali enterprises need a large amount of raw salt every day, and its quality and price affect the market competitiveness of chlor-alkali enterprises. The raw salt used by foreign chlor-alkali enterprises is basically refined salt (its purity is above 99%, or even 99.5%); while the raw salt used by domestic chlor-alkali enterprises is mainly divided into sea salt, lake salt, and mineral salt according to their sources. Wait.

[0003] From crude salt to chlor-alkali products, the first process that must be passed through is brine refining. Its main task is to dissolve solid crude salt and remove impurities ha...

Claims

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