Environment-friendly ammonia-soda soda ash production process, the production system used, the treatment method of ammonia distillation waste liquid, and the treatment system used
A technology for distilling ammonia waste liquid and a treatment system, which is applied in the direction of alkali metal chlorides, carbonate preparations, calcium/strontium/barium chlorides, etc., can solve environmental pollution and other problems, achieve good environmental protection performance, and realize recycling and reuse , The effect of saving the amount of utilization
Active Publication Date: 2019-10-29
蚌埠凯盛玻璃有限公司
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[0003] The purpose of the present invention is to provide an environment-friendly ammonia-soda method for the production of soda ash in the prior art, which contains a large amount of sodium chloride and calcium chloride and pollutes the environment. The process and the production system used, the treatment method of the ammonia distillation waste liquid, and the treatment system used
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0031] Such as Figure 2-6 Shown, environment-friendly type ammonia-soda method soda ash production technique of the present invention is the improvement carried out on the basis of traditional ammonia-soda method soda ash production technique, it adopts forward osmosis process to the ammonia distillation waste that traditional ammonia-soda method soda ash production technique produces The raw salt in the original production process is first added to the draw liquid pool of the forward osmosis device, and the brine obtained through forward osmosis is refined and used as the raw material for the ammonia soda ash production process to absorb ammonia. Its process is: raw salt is added to the draw liquid pool to obtain the draw liquid—obtain brine through forward osmosis—brine refining—use the ammonia soda method for soda ash production process—get soda ash...
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The invention aims to solve the defects that an ammonia distilling waste liquid in an ammonia-soda-method sodium carbonate production process contains large amount of sodium chloride and calcium chloride in the prior art, which may cause environment pollution, and provides an environment-friendly ammonia-soda-method sodium carbonate production process, a production system therefor, a treatment method of the ammonia distilling waste liquid, and a treatment system used for the treatment method. In the production system, a salt water ammonia absorption system absorbs ammonia gas to obtain ammonia salt water, which is carbonized in an ammonia salt water carbonizing apparatus to produce a sodium bicarbonate solution which is then separated in a mother liquid distilling device to obtain sodium bicarbonate. The sodium bicarbonate is then calcined in a calcination apparatus to produce sodium carbonate and CO2; an ammonia-containing liquid, which is obtained through separation in the mother liquid distilling device, enters an ammonia distilling waste liquid collection tank in the ammonia distilling waste liquid treatment system. The system and the method for producing the sodium carbonate are free of generation of waste liquid and waste solid, has good environment-friendly performance and can reduce use amount of crude salt in an alkaline-method sodium carbonate production process.
Description
technical field [0001] The invention belongs to the technical field of soda ash production by ammonia-soda method, and in particular relates to a soda ash production process by ammonia-soda method, a production system used, a method for treating ammonia distillation waste liquid, and a treatment system used. Background technique [0002] Such as figure 1 As shown, in the prior art, when producing soda ash by the ammonia-soda method, salt and limestone are used as the main raw materials for production, and ammonia is used as the intermediate auxiliary material. In this process, raw salt is dissolved and refined in water to obtain refined brine, refined brine absorbs ammonia to generate ammonia brine, ammonia brine absorbs carbon dioxide (commonly known as carbonization) to form sodium bicarbonate suspension, the suspension is separated from solid and liquid, and the filter cake is calcined Finally, the final product soda ash is obtained, and the carbon dioxide produced in th...
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IPC IPC(8): C01D7/18C01D3/04C01F11/30
CPCC01D3/04C01D7/18C01F11/30
Inventor 张勇军
Owner 蚌埠凯盛玻璃有限公司