Circulating environment-friendly treatment process and circulating environment-friendly treatment system for waste viscose liquid

Abstract

The invention relates to a circulating environment-friendly treatment process and circulating environment-friendly treatment system for waste viscose liquid and belongs to the technical field of wasterecovery and environment-friendly treatment in viscose fiber production. According to the circulating environment-friendly treatment system, a centrifuge, a transfer chute, a blending tank, a coarsefilter device, a fine filter device, resin towers, a bipolar membrane device and a circulation tank are arranged, steps of centrifugalization, dissolution, pH regulation, temperature regulation, sodium sulfate concentration regulation, coarse filtration, fine filtration, resin chelation and purification, bipolar membrane electrodialysis, post treatment and the like are performed, conditions, process parameters, equipment, indexes and the like are optimized, and acid, alkali and dilute salt are recycled, so that the problems that the waste viscose liquid is difficult to treat and materials arewasted are effectively solved. Thus, not only are the purity, concentration and yield of sulfuric acid and sodium hydroxide effectively guaranteed, but also products obtained from the steps are recycled to the circulating environment-friendly treatment process or a viscose fiber production procedure, therefore the purposes of being low in energy consumption and reducing raw material cost are achieved. Besides, zero discharge is realized, and environmental pressure is reduced.

Description

technical field [0001] The invention relates to a treatment method and system for viscose waste liquid, in particular to a closed and environment-friendly treatment method and system for viscose waste liquid, belonging to the technical field of waste recovery and environmental protection treatment in viscose fiber production. Background technique [0002] Viscose fiber is a chemical fiber made of polymer materials containing natural cellulose, such as wood pulp and cotton pulp, through chemical and mechanical processing. It is the most similar type of chemical fiber to natural fiber clothing. Breathable, elegant hanging, bright dyeing, antistatic and easy for textile processing, etc., it is derived from natural and superior to natural regenerated cellulose fiber, and is one of the important raw materials for the textile industry. At present, there are about 40 viscose fiber enterprises in my country. In addition to producing ordinary viscose fiber (filament, short fiber) and...

AI Technical Summary

Problems solved by technology

Through the setting of centrifuges, transfer tanks, blending tanks, coarse filtration devices, fine filtration devices, resin towers, bipolar membrane devices and circulation tanks, through centrifugal separation, dissolution, pH adjustment, temperature adjustment, sodium sulfate concentration adjustment, coarse Filtration, fine filtration, resin chelation adsorption, bipolar membrane electrodialysis and post-treatment steps, as well as optimized conditions, process parameters, equipment and indicators, etc., to recover acids...

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