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Treatment method and device for tendency of zero liquid discharge of viscose wastewater in inland area

A treatment method and wastewater technology, which is applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems that affect the enthusiasm and initiative of enterprises to control pollution, increase product costs, and economic Benefit reduction and other problems, to achieve the effect of reducing the cost of treatment, low production and operation costs, and no secondary pollution

Inactive Publication Date: 2015-12-16
天津市生态环境科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large amount of wastewater in the viscose fiber industry has become a heavy burden on the economic development of enterprises, especially in water-shortage areas. Due to the constraints of water resources, the cost of enterprises' products has increased and economic benefits have declined, thus affecting the enthusiasm and initiative of enterprises to control pollution. sex

Method used

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  • Treatment method and device for tendency of zero liquid discharge of viscose wastewater in inland area
  • Treatment method and device for tendency of zero liquid discharge of viscose wastewater in inland area
  • Treatment method and device for tendency of zero liquid discharge of viscose wastewater in inland area

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Effect test

Embodiment 1

[0041] A treatment device for viscose wastewater that tends to zero liquid discharge in inland areas, including pretreatment blowing tanks, alkaline spray towers, cooling circulation towers, aerobic biochemical tanks, continuous microfiltration, neutralization sedimentation tanks, high Salt-containing aerobic biological enhancement tank, brackish water membrane, three-effect evaporation crystallization / MVR, sedimentation tank, mud storage tank, plate and frame filter press, among which pretreatment stripping tank 1 and 1' and cooling circulation tower 3, 3' , aerobic biochemical tank 4, continuous microfiltration tank+reverse osmosis membrane 5, and high-salt aerobic bio-augmentation pool 7 are connected in sequence; It is connected with the sedimentation tank 10, and the sedimentation tank 10 is connected with the three-effect evaporation crystallization / MVR9 of the brackish water film 8 in sequence. The plate and frame filter press 12 is connected, and the alkaline spray tow...

Embodiment 2

[0043] Pretreatment: Blow off the waste water, carry out alkaline elution of the hydrogen sulfide gas blown out through the spray tower, and recycle the eluted waste liquid;

[0044] Viscose chemical fiber wastewater is accompanied by the generation of wastewater, as well as the generation of a large amount of hydrogen sulfide gas, which is washed by the alkaline spray tower. The chemical reaction in the alkali spray tower is driven by the pump to carry out circular spraying, and the hydrogen sulfide gas and carbon disulfide gas discharged from the alkali spray tower meet the standard discharge. Using this method to absorb hydrogen sulfide waste gas has high efficiency and large processing capacity per unit time, and solves the problems of environmental pollution and production safety hazards caused by hydrogen sulfide waste gas discharge. This technology is to react waste lye containing sodium hydroxide solution and alkali fiber containing hemicellulose with hydrogen sulfide ...

Embodiment 3

[0061] practical application

[0062] In a viscose chemical fiber factory, a Chinese experiment was performed on viscose wastewater to treat high-temperature acidic wastewater by bioaugmentation. The high-salt wastewater is first blown off to remove the hydrogen sulfide gas in the wastewater, and then the waste gas is recovered through the alkaline spray tower technology, and the hydrogen sulfide gas and carbon disulfide gas discharged from the recovered liquid from the alkali spray tower meet the standard discharge. The waste liquid containing sodium hydroxide, sodium sulfide, and sodium hemicellulose xanthate is returned to the initial process for resource recycling. Secondly, after the waste water enters the cooling tower for cooling, acid-base neutralization is carried out. Neutral high salinity wastewater for bioaugmentation experiments. Chinese design waste water flow size is 1m 3 / h, two sets of experiments were designed, which were two sets of equipment for activate...

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Abstract

The invention relates to a treatment method and device for tendency of zero liquid discharge of viscose wastewater in an inland area. The treatment method comprises that (1) high salt and low salt content wastewater is separately treated; (2) two kinds of wastewater is subjected to air stripping and cooling treatment respectively; air-stripped hydrogen sulfide gas is subjected to alkaline recovery through a spray tower; (3) low salt content wastewater is subjected to biochemical treatment after acid and alkali fine-tuning, the wastewater meets the primary standard and is reused after continuous microfiltration and reverse osmosis membrane, and the reuse rate is 60-75%; (4) wastewater is concentrated with a brackish water membrane after double membrane thick water and high salt content wastewater are subjected to high salt content biochemical treatment; (6) concentrated wastewater is evaporated and crystallized, distilled water returns to a forepart biochemical treatment system, and the crystallized salt content is sold out. According to the treatment method and device for tendency of zero liquid discharge of viscose wastewater in the inland area, a viscose wastewater zero liquid discharge treatment process which is good in treatment effect, low in cost, resource-saving and circular economic is provided, and the method and the device are applicable to popularization and application in glue industry wastewater in the inland area.

Description

technical field [0001] The invention relates to a waste water treatment and reuse process, in particular to a treatment method and device for viscose waste water tending to zero liquid discharge in inland areas, and is especially suitable for treating viscose waste water in the chemical fiber industry and achieving production recovery. A standard wastewater treatment and reuse process and equipment thereof belong to the technical field of environmental protection. Background technique [0002] Viscose fiber is a chemical fiber processed by chemical and mechanical methods using polymer materials such as wood pulp and cotton pulp containing natural cellulose. It is a regenerated cellulose fiber derived from nature and superior to nature in chemical fiber, and it is one of the important materials of textile industry raw materials. Viscose fiber needs a lot of chemical raw materials in the production process and will produce a lot of wastewater. These wastewater contains sulfur...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/30
Inventor 段云霞乔楠许丹宇吕晶华石岩张金鸿郑先强
Owner 天津市生态环境科学研究院