Method for simultaneously preparing zinc chloride and sodium sulfide by chemical fiber waste residue mud

Abstract

The invention belongs to the technical field of chemical industry three-waste treatment and utilization, and in particular relates to a method for simultaneously preparing zinc chloride and sodium sulfide by chemical fiber waste residue mud. The main technical scheme comprises washing chemical fiber waste residue mud, preparing into diluted emulsion, and reacting with hydrochloric acid; firstly absorbing the gas generated during reaction by a sodium hydroxide solution, then distilling by a distiller, cooling, crystallizing, crushing and packaging to obtain a sodium sulfide crystal product; adding a small amount of calcium chloride and zinc hydroxide sequentially in the mixed liquid generated after reaction, and filtering after reaction; and then distilling filtrate, condensing, centrifugally drying, crushing, checking weight and packaging to obtain a zinc chloride crystal product. According to the invention, not only is waste mud generated by the chemical fiber production industry treated effectively, the chemical industry pollution is eliminated, but also the chemical fiber waste mud can be changed into zinc chloride and sodium sulfide products with economic value, the production process and the device thereof are simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of treatment and utilization of three chemical wastes, in particular to a method for preparing zinc chloride and co-producing sodium sulfide by using chemical fiber waste sludge. technical background [0002] Fiber is a necessity for social production and life, and a basic material for the textile industry. The type and quantity of fibers and the quality are important symbols of a country's production, technology and living standards. In today's society, the types of fibers can be summarized into three categories: plant fiber, dynamic fiber and chemical fiber; chemical fiber is the product of the development of modern industry; chemical fiber is made of natural polymer compounds or artificially synthesized polymer compounds. Fibers with textile properties produced by silk stock solution, spinning and post-processing processes; in 1985, the world's chemical fiber output was more than 1 million tons, accounti...

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Problems solved by technology

[0006] The traditional method of treating waste sludge is usually to filter it into a cake and transport it away for accumulation, which is not conducive to environmental protection and wastes transportation costs, especially the waste of valuable material elements contained in the waste sludge; at present, there is no use of chemical fiber waste sludge to prepare chlorine. Related reports on the method of co-producing sodium sulfide with zinc chloride

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