Production method for desalination and comprehensive utilization of seawater

A production method, concentrated seawater technology, applied in chemical instruments and methods, seawater treatment, magnesium hydroxide, etc., can solve the problems of large climate impact, passive production, and many impurities and salts, and achieve the effect of solving discharge pollution
CN102167459AInactive Publication Date: 2011-08-31天津长芦汉沽盐场有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
天津长芦汉沽盐场有限责任公司
Publication Date
2011-08-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a production method for desalination and comprehensive utilization of seawater. The method comprises the following steps: permeating high- concentration seawater obtained after fresh water preparation through an ionic membrane, separating out specific ions, and making into various sea salt chemical products by adopting a heating and evaporation manner, thus realizing the comprehensive utilization of seawater, achieving zero emission and playing a positive role in protecting the environment. In the invention, inorganic double-decomposition reaction is carried out on fresh seawater containing magnesium sulfate and calcium sulfate to obtain corresponding calcium and magnesium products and fresh water, thus completely solving the problem of pollution emission. Furthermore, mother liquor after potassium production can be oxidized and distilled to obtain bromine products, and waste liquor after bromine production can be finally processed into the calcium and magnesium products, thus completely converting seawater into chemical products and further achieving the purpose of zero emission.
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Description

technical field

[0001] The invention relates to the field of comprehensive utilization of seawater, and more specifically relates to a production method for comprehensive utilization of seawater desalination. Background technique

[0002] Desalination of seawater means that seawater condenses the secondary steam into fresh water through multi-effect evaporation, but at the same time the seawater is concentrated, and directly discharged into the sea will pollute the seawater. Generally, seawater desalination projects are equipped with salt factories and chemical plants of corresponding scale. The concentrated seawater is dried in beach fields to produce raw salt, and the mother liquor is re-dried, concentrated and then sent to chemical plants to produce potassium chloride, magnesium chloride, products such as bromine.

[0003] The main disadvantages of this production method are:

[0004] 1. It covers a large area, and drying salt in beach fields requires a lot of land reso...

Claims

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