PVA wastewater treatment system and treatment method

A technology of treatment system and treatment method, applied in the field of PVA wastewater treatment system, can solve the problems of increased sewage treatment cost and increased difficulty of biochemical treatment, and achieve the effects of reducing steam consumption, realizing reuse, and reducing production cost

Pending Publication Date: 2021-06-25
SUZHOU SUJING ENVIRONMENTAL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the difficulty of biochemical treatment and the cost of sewage treatment increase due to the inhibitory effect of sulfate ions on the biochemical system, the present invention provides a treatment system and treatment method for PVA wastewater

Method used

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  • PVA wastewater treatment system and treatment method

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Embodiment 1

[0038] according to figure 1 A treatment system for PVA wastewater is shown, including fiber bundle filter 2, heat exchange system 3, ultrafiltration system 4, reverse osmosis system 6, fresh water circulation tank 5, concentrated water circulation tank 8, electrodialysis system 7, concentrated brine Box 9 and freezing and crystallization system 10; the outlet of the raw water tank 1 containing PVA waste water is connected with the inlet of the fiber bundle filter 2 through a pipeline, and the outlet of the fiber bundle filter 2 is connected with the heat exchange system 3 through a pipeline , the heat exchange system 3 is connected to the ultrafiltration system 4 through pipelines, the ultrafiltration system 4 is connected to the fresh water circulation tank 5 through pipelines, the fresh water circulation tank 5 is connected to the reverse osmosis system 6 and the fresh water circulation tank 5 is connected to the reverse osmosis system Between 6, a booster pump 11, a securi...

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Abstract

The invention discloses a PVA wastewater treatment system and treatment method, and relates to the technical field of wastewater treatment. A PVA wastewater containing raw water tank is connected with a fiber bundle filter, an outlet of the fiber bundle filter is connected with a heat exchange system, the heat exchange system is connected with an ultrafiltration system, and the ultrafiltration system is connected with a fresh water circulation tank; the fresh water circulating tank is connected with a reverse osmosis system, and a booster pump, a security filter and a high-pressure pump are sequentially arranged between the fresh water circulating tank and the reverse osmosis system; a water inlet of the electrodialysis system is connected with the fresh water circulating tank and is used for carrying out salt separation treatment and concentration treatment on wastewater in the fresh water circulating tank; one end of the concentrated water circulation tank is connected with the electrodialysis system, and the other end is connected with the concentrated brine tank which is connected with a freezing crystallization system. According to the invention, the problems of low fresh water recycling rate, low concentrated water concentration multiple, resource waste, high treatment cost, unstable system operation and the like in PVA washing wastewater treatment are effectively solved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment system and method for PVA wastewater. Background technique [0002] Polyvinyl alcohol fiber (PVA) is a widely used organic synthetic fiber material. Because of its good strength, modulus, acid and alkali resistance, and easy solubility, it can be used in concrete reinforcement, papermaking, textiles, and medicine. . Polyvinyl alcohol fibers are manufactured from polyvinyl alcohol through processes such as dissolution, filtration, defoaming, spinning, coagulation, and heat treatment. [0003] During the production process of polyvinyl alcohol fibers, a large amount of wastewater will be generated. The washing wastewater contains high concentrations of sodium sulfate and organic pollutants. It is difficult to treat and reuse it by traditional treatment methods. At present, these wastewaters basically go directly to the existing sewage treatment plants. Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C01D5/00C02F103/38
CPCC01D5/00C02F1/001C02F1/22C02F1/441C02F1/444C02F1/4693C02F9/00C02F2001/5218C02F2103/38C02F2303/10
Inventor 陈侃孙芳张寒雨陈士军徐庆云马楫
Owner SUZHOU SUJING ENVIRONMENTAL ENG
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