Method for removing influence of total reducing substance on appearance in technology of producing calcium chloride through ammonia-alkali process

Abstract

The invention provides a method for removing the influence of a total reducing substance on the appearance in a technology of producing calcium chloride through an ammonia-alkali process. In the technology of producing the calcium chloride through high-concentration calcium liquid formed after evaporation and concentration on waste liquid through the chlorine-alkali process, a mixing reactor is connected between a clarifying tank containing the high-concentration calcium liquid and a calcium liquid bucket, the high-concentration calcium liquid with the measured content of the total reducing substance and quantitative hydrogen peroxide diluted to a set concentration are stirred and mixed uniformly in the mixing reactor, the hydrogen peroxide and the total reducing substance enter the calcium liquid bucket after a reducing reaction is finished, and then subsequent conventional calcium chloride production is conducted. According to the method for removing the influence of the total reducing substance on the appearance in the technology of producing the calcium chloride through the ammonia-alkali process, the influence on the appearance of products caused by corrosion of the total reducing substance on equipment and other factors can be removed before production of fixed calcium chloride products.

Description

technical field [0001] The invention relates to the technical field of calcium chloride production, in particular to a process for eliminating the influence of total reducing substances such as sodium sulfide on the appearance of calcium chloride during the production of calcium chloride by an ammonia-alkali method. Background technique [0002] The waste liquid produced by the ammonia-soda method is used as the raw material for the production of calcium chloride. During the production process of the chlor-alkali method, the addition amount of the total reducing substance sodium sulfide may be adjusted, resulting in excessive total reduction content mainly composed of sodium sulfide in the waste liquid. High, it will cause serious corrosion to the calcium liquid carbon steel storage tank above 170°C in the production process of calcium chloride, and the released molten calcium liquid will have black slag, which will affect the appearance of the final calcium chloride produced...

AI Technical Summary

Problems solved by technology

[0002] The waste liquid produced by the ammonia-soda method is used as the raw material for the production of calcium chloride. During the production process of the chlor-alkali method, the addition amount of the total reducing substance sodium sulfide may be adjusted, resulting in excessive total reduction content mainly composed of sodium sulfide in the waste liquid. High, it will cause serious corrosion to the calcium liquid carbon steel storage tank above 170°C in the production process of calcium chloride, and the released molten calcium liquid will have black slag, which will affect the appearance of the final calcium chloride produced and cannot be processed. For normal product sales