Soda Ash-Calcium Chloride Co-production Process Pilot Success

June 26, 2018

Recently, it was learned from Qingdao Alkali Industry Co., Ltd. that after more than six months of hard work, the pilot company's self-developed intellectual property soda-calcium chloride co-production new technology pilot test has been successful. Yu Yingming, deputy general manager of the company, said that the soda ash system energy-saving emission reduction technology upgrade project (abbreviated as the new process) to calcium chloride concentration reached 40%, light ash energy consumption in the comprehensive energy consumption of 405 kg standard coal / tonne basis on the decline 80 kg standard coal/ton, has become the world's most advanced chemical synthesis soda method.

The soda ash-calcium chloride co-production new process is a production method between the ammonia-alkali process and the soda process. It combines the advantages of the ammonia-alkali process and the soda process to produce soda ash and calcium chloride. As the mother liquor is recycled, there is no waste water discharge and it is an environmentally friendly production method. At the same time, salt utilization increased from 75% to more than 95%, saving a lot of raw salt.

Yu Yingming said that compared with the ammonia-soda process, the new process co-produces soda ash and calcium chloride, and the production cost is shared by the two-ton product, which reduces production costs and can greatly increase the economic efficiency of the company. Ammonia-alkali raw material liquid calcium chloride concentration of about 11%, the new process calcium chloride concentration of up to 40%, not only per ton of calcium chloride can reduce steam consumption 200 kg of standard coal, due to the small amount of mother liquor, soda distillation can also Save 80 kg of coal as a standard for steam and energy savings.

In addition, the solid waste of the new process mainly comes from unburnt limestone, no newly generated waste slag, easy to settling and washing, washing waste water can also be used for the extraction of raw salt, solid waste residue can also be fully realized after desulfurization of thermal power plants and the use of building materials. Utilization, which also greatly reduces product energy consumption and production costs.

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