Brine Refining Economy Operation Research And Application Of Ionic Membrane Caustic Soda

Jinchuan company chlor-alkali production capacity (including those under construction) has reached to 500 kt/a. Due to the need to add a lot of in the process of brine refining extract preparation such as sodium hydroxide, sodium carbonate is used to remove impurities such as sediment in the brine, Ca2+, extract preparation consumes 20% of the cost of ionic membrane alkali system controlled, brine has important practical significance in the study of economic operation of ionic membrane caustic soda refining. The company continued to strengthen research in recent years,is committed to ionic membrane caustic soda water economy research and application of the operation, in terms of reducing consumption of extract preparation to do a lot of work.The quality of brine of ionic membrane caustic soda system influence on current efficiency and greater life of ionic membrane,extract preparation dosing quantity restriction of refined quality promotion effect. By supporting the downstream consumption of chlorine device production factors, such as chemical plant ionic membrane caustic soda system in recent years, low load operation, tons of alkali average variable cost 2365.3 yuan/ton. Brine refining process of sodium carbonate, sodium hydroxide, hydrochloric acid and water consumption is large, leads to the overall level of the brine refining cost is higher than the same industry. Domestic many ionic membrane alkali production enterprises long-term commitment to the quality of brine coordination ionic membrane caustic soda system and extract preparation the contradiction of consumption, on the premise of guarantee the quality of brine is reliable, solves the low efficiency of reaction tank before and after reaction tank sodium carbonate mixed unevenly, quantitative resin tower design, index fluctuation caused by alkaline wastewater reuse brine, etc. The key technical problems to extract preparation consumption.The project based on reducing consumption of extract preparation, by means of technological innovation, through a lot of theoretical research, after all point to extract preparation flow, brine indicators such as repeated tracking, simulation test and solve the above problem, established a complete set according to different production load matching the brine refining operation control technology. And applied to ionic membrane caustic soda system, significantly improved the process technology of refining brine indicators, reduce material consumption, the system realized the brine refining plant economic and stable operation. Remarkable economic benefits, social benefits and economic operation of chlor-alkali industry will play a positive role in demonstration and popularization.