Novel environment-friendly circulation technological system and novel environment-friendly circulation technological method on basis of combined soda ash preparation processes

Abstract

The invention relates to a novel environment-friendly circulation technological system and a novel environment-friendly circulation technological method on the basis of combined soda ash preparation processes. The novel environment-friendly circulation technological system comprises a mother liquor II barrel, an ammonia absorber II, an ammonia mother liquor II barrel, a carbonization tower system, a compression device, a soda outlet tank, a filter, a light ash calcining furnace, a light ash soda cooling system, a hydration machine, a heavy ash calcining furnace, an soda cooler, a mother liquor I barrel, an ammonia absorber I, a heat exchanger, a semi-mother liquor II barrel, a gathering tank, a cold separation crystallizer, a salting-out crystallizer, a No.2 weir type flow meter, a salting-out thickener, a No.1 weir type flow meter, a cold separation thickener, a centrifugal ammonium filter, a dense ammonium packaging system, an ammonium drying furnace and a dry ammonium packaging system. The novel environment-friendly circulation technological system and the novel environment-friendly circulation technological method have the advantages that generated 'waste mixed water' can be completely digested in a self-circulation manner; waste gas can be discharged after being treated and reaching standards; AII mud and residues can be reused as desulfurizing agents for boilers after being treated; the novel environment-friendly circulation technological system is high in production efficiency, the yield of ammonium chloride can reach 650 thousand tons / year, and the yield of soda can reach 600 thousand tons / year (the yield of dense soda is 400 thousand tons / year).

Description

technical field [0001] The invention relates to a soda ash production system and method of a combined soda production method, in particular to a novel environmental protection cycle process system and method of a combined soda production method. Background technique [0002] my country's soda ash production mainly adopts two production processes of "ammonia-soda method" and "combined soda method", and a small amount of trona is used as raw material for processing. Due to the advantages of high utilization rate of raw salt, less pollution, and low energy consumption, the combined soda process has developed rapidly in recent years, and the total production capacity of combined soda plants in my country has exceeded that of ammonia soda. [0003] The production of soda ash by the combined soda method adopts the mother liquor circulation method. The mother liquor is used to produce ammonium chloride, and the ammonium mother liquor is recycled to make soda, so that the equivalent...

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Problems solved by technology

[0004] In order to overcome the above-mentioned defects, the present invention provides a new type of environmental protection circulation process system of the combined soda production method, which can solve the technical problems of low production efficiency and low product quality of the existing combined soda process circulation system, and more importantly, utilize the circulation process Thoroughly solve the environmental protection problems faced by the original system

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