A purification system for na+ and cl- ions

Abstract

The invention discloses a Na<+> and Cl<-> ion purification system. The Na<+> and Cl<-> ion purification system is characterized in that a sodium chloride solution in a special positive displacement pump is sampled through a sodium chloride purification tank, a sample is sent to an integrated laboratory, concentration of each substance in the solution is analyzed, then analysis data are sent to a purification controller, and flow of an ion purification agent is controlled. The Na<+> and Cl<-> ion purification system has the advantages as follows: 1, a production process is optimized, the automation degree is high, the operation is simple and convenient, and control is easy; 2, the concentration and mass of a chlor-alkali solution are guaranteed; 3, Ca ions, Mg ions and sulfate ions are processed separately, the operational flexibility of the system is high, the range of application to salt varieties is wide, stable quality of purified brine can be guaranteed sufficiently, and optimization of the operation of an electrolytic bath is facilitated; 4, an inorganic purification agent is adopted to replace an organic purification agent, so that organic polymer substances are prevented from entering the electrolytic bath and adverse effects caused by entering of the organic polymer substances are avoided.

Description

technical field [0001] The invention relates to the technical improvement of the chlor-alkali industry, in particular to a Na+ and Cl-ion purification system. Background technique [0002] In industry, NaOH, Cl2 and H2 are prepared by electrolysis of saturated sodium chloride solution, and a series of chemical products are produced with them as raw materials, which is called the chlor-alkali industry. The chlor-alkali industry is one of the most basic chemical industries. Its products are not only used in the chemical industry itself, but also widely used in light industry, textile industry, metallurgical industry, petrochemical industry and public utilities. Due to the high concentration, high purity and low energy consumption of the products obtained by the exchange membrane method, it is currently the most advanced process for producing chlor-alkali. [0003] The main technological process of the exchange membrane method is as follows: In the electrolytic cell, the anode...

AI Technical Summary

Problems solved by technology

However, in the production process of industrial sodium chloride, due to the relatively backward production technology and high purification costs, the quality of the refined brine after salting is relatively low, and the concentration of Ga, Mg, Ba, and Fe ions is very high, and the concentration can usually reach 1200ppm seriously. Affect the production efficiency and product quality of the chlor-alkali exchange membrane process

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