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

A technology for environmental protection and waste liquid treatment, which can be used in textile industry wastewater treatment, filtration treatment, multi-stage water treatment, etc.

Pending Publication Date: 2019-01-04
YIBIN HIEST FIBER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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...

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] A recycling and environmental protection treatment process for viscose waste liquid,

[0106] After the viscose waste liquid is separated by the centrifuge 1, the powdery solid containing sodium sulfate, zinc sulfate and sulfuric acid and the concentrated acid bath containing sodium sulfate, zinc sulfate and sulfuric acid are obtained, and the concentrated acid bath is directly transported to the viscose through the pipeline. In the acid storage tank of the acid station in the rubber fiber production process, the powdery solids containing sodium sulfate, zinc sulfate and sulfuric acid are placed in the transfer tank 2;

[0107] By adding demineralized water into the transfer tank 2, the powdery solid is dissolved to obtain a solution;

[0108] Then, the dissolving solution is passed into the blending tank 3, and the temperature, pH and sodium sulfate concentration in the blending tank 3 are adjusted to obtain a solution containing suspended matter;

[0109] Under this ...

Embodiment 2

[0118] On the basis of embodiment 1, further,

[0119] Further, the viscose waste liquid includes sodium sulfate with a concentration of 200g / L, zinc sulfate with a concentration of 0.1g / L and sulfuric acid with a concentration of 5g / L;

[0120] The concentration of sodium sulfate in the lysate is 300g / L;

[0121] The sodium sulfate concentration control in the described deployment tank 3 is 300g / L;

[0122]Described acid solution is the sulfuric acid solution of concentration 60g / L, and after reverse osmosis, described concentrated sulfuric acid solution concentration is 110g / L, and described dilute sulfuric acid solution concentration is 10g / L;

[0123] Described lye is the sodium hydroxide solution that concentration is 45g / L; After nanofiltration membrane action, described sodium hydroxide solution concentration is 45g / L;

[0124] Described brine comprises the sulfuric acid solution that concentration is 20g / L and the sodium sulfate solution that co...

Embodiment 3

[0142] On the basis of embodiment 2, the difference of this embodiment is:

[0143] Further, the viscose waste liquid includes sodium sulfate with a concentration of 300g / L, zinc sulfate with a concentration of 1g / L and sulfuric acid with a concentration of 10g / L;

[0144] The concentration of sodium sulfate in the lysate is 300g / L;

[0145] The sodium sulfate concentration control in the described deployment tank 3 is 300g / L;

[0146] Described acid solution is the sulfuric acid solution of concentration 80g / L, and after reverse osmosis, described concentrated sulfuric acid solution concentration is 130g / L, and described dilute sulfuric acid solution concentration is 30g / L;

[0147] Described lye comprises the sodium hydroxide solution that concentration is 80g / L and the sodium sulfate solution that concentration is 2g / L; After nanofiltration membrane effect, described sodium hydroxide solution concentration is 80g / L, and sodium sulfate in mixed liquor ...

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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...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F103/30
CPCC02F9/00C02F1/42C02F1/38C02F1/442C02F1/441C02F1/4693C02F1/5236C02F1/66C02F2103/30C02F1/001C02F2301/08Y02A20/131
Inventor 邓传东贺敏夏长林徐绍贤王云刘洪周勇廖磊
Owner YIBIN HIEST FIBER
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