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Staple fiber producing acidic water recycling technology

A technology of acidic water and acidic wastewater, which is applied in the field of viscose staple fiber production, can solve the problems of large wastewater discharge, insufficient environmental protection, and large water consumption, and achieve reduced wastewater treatment costs, fast pH adjustment, and high economic benefits and the effect of social benefits

Inactive Publication Date: 2017-12-12
YIBIN GRACE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the technical problems of the prior art that the desulfurization bath on the filament after desulfurization needs to be cleaned with soft water, resulting in large water consumption, large waste water discharge, and insufficient environmental protection, and provides a new short fiber acidic water reuse process, By combining the acidic water in the viscose production process and the wastewater treatment of the desulfurization bath, the cost of wastewater treatment can be greatly saved, environmental pollution can be reduced, and economic and social benefits can be improved.

Method used

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Examples

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Effect test

Embodiment 1

[0028] A short fiber acidic water reuse process, the steps are as follows: the multi-effect wastewater from the acid returning station and the acidic wastewater from the washing tank are passed into the washing station at the back end of the desulfurization station, and the fibers desulfurized by the desulfurization station are washed. The pH value satisfies 8.5~10.5, such as figure 1 shown.

Embodiment 2

[0030] A short fiber acidic water recycling process, the steps are as follows: the multi-effect wastewater from the acid returning station and the acidic wastewater from the washing tank are passed into the washing station at the rear end of the desulfurization station, and the fibers desulfurized by the desulfurization station are washed.

[0031] The pH value of the multi-effect wastewater of the present embodiment is 1.0; The flow of the multi-effect wastewater into the washing station is 40m 3 / h, the temperature when the multi-effect wastewater is fed is 20°C.

[0032] The pH value of the acidic wastewater in the present embodiment is 2.0; the flow of the multi-effect wastewater into the washing station is 15m 3 / h, the temperature when the multi-effect wastewater is fed is 20°C.

[0033] The pH value of the fiber after washing in this embodiment satisfies 8.5-10.5. Process flow chart such as figure 1 shown.

[0034] The pH value is 3.0; the flow rate of the multi-eff...

Embodiment 3

[0039] A short fiber acidic water recycling process, the steps are as follows: the multi-effect wastewater from the acid returning station and the acidic wastewater from the washing tank are passed into the washing station at the rear end of the desulfurization station, and the fibers desulfurized by the desulfurization station are washed.

[0040] The pH value of the multi-effect wastewater of the present embodiment is 3.0; The flow of the multi-effect wastewater into the washing station is 40m 3 / h, and the temperature when the multi-effect wastewater is introduced is 40°C.

[0041] The pH value of the acid wastewater in this embodiment is 4.0; the flow rate of the multi-effect wastewater into the washing station is 18m 3 / h, the temperature when the multi-effect wastewater is fed is 20°C.

[0042] In this embodiment, the pH value of the fiber after washing does not meet 8.5-10.5, and soft water is used for washing until the pH value of the fiber is 8.5-10.5. Process flow ...

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Abstract

The invention discloses a staple fiber producing acidic water recycling technology, and belongs to the technical field of viscose staple fiber production. The staple fiber producing acidic water recycling technology comprises the following steps: introducing multi-effect wastewater at an acid station and acidic wastewater in a washing tank into a washing station at the back end of a desulfurizing station, and washing fiber desulfurized by the desulfurizing station, wherein the pH value of the washed fiber is 8.0-11.0. By the staple fiber producing acidic water recycling technology, the technical problems that in the prior art, waste of water resources is caused and a lot of sewage is produced because the fiber after a desulfurizing bath is required to be washed by using soft water are mainly solved. The staple fiber producing acidic water recycling technology has the advantages of reduction in wastewater treatment cost and reduction in pollution.

Description

technical field [0001] The invention relates to a waste water recycling process, in particular to a short fiber acidic water recycling process, which belongs to the technical field of viscose staple fiber production. Background technique [0002] Viscose undergoes a chemical reaction in the acid bath to form fibers. After the fibers are formed, a large amount of acid bath returns to the acid station and passes through the multi-effect evaporator. The steam indirect heating evaporates the excess water in the acid bath and precipitates sodium sulfate. Will produce a kind of acid multi-effect water wastewater containing a certain concentration of sulfuric acid. [0003] After the viscose is molded in the acid bath, there are more acid baths attached to the surface of the tow, and the tow carries the acid bath into the washing tank for washing. The washing tank must be continuously replenished with clean water, and the washed acid will overflow. Wastewater, so as to achieve a d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F103/30
CPCC02F1/66C02F2103/30
Inventor 梁堂钟伟刘小军竭发全陈小平刘福胜
Owner YIBIN GRACE
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