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Method and device for coal chemical sewage reuse and zero emission

A technology of coal chemical industry and zero discharge, which is applied in the field of coal chemical wastewater reuse and zero discharge, can solve the problem that drainage cannot meet national or local discharge standards, achieve improved biochemical treatment effects, simple process steps, and reduce refractory pollutants Effect

Active Publication Date: 2014-07-09
北京清大国华膜科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a method and device for reuse and zero discharge of coal chemical wastewater, which solves the disadvantages of the prior art in the treatment of coal chemical wastewater by methods such as biological oxidation, adsorption, catalytic oxidation, anaerobic-aerobic combination, etc. , the problem that the drainage after treatment cannot meet the national or local discharge standards

Method used

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  • Method and device for coal chemical sewage reuse and zero emission

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Embodiment 1

[0107] Methanol waste water from coal, raw water COD Cr It is 1000mg / L~1500mg / L, and it is treated by the method and device of coal chemical wastewater reuse and zero discharge. The advanced oxidation treatment process section is not used, and the sludge concentration of the multi-stage A / O system is 3500mg / L~4000mg / L , the system residence time is 20 hours, and the sludge reflux ratio is 100%. Membrane filtration system 9 produced water COD Cr ≤50mg / L, super efficient reverse osmosis system produced water COD Cr ≤10mg / L. Membrane filtration system 9 produces water that is colorless, clear, and odorless, and can be used in production that does not require high water quality; the water produced by the ultra-efficient reverse osmosis system has high water quality and can be used as circulating cooling water or boiler feed water; ultra-efficient reverse osmosis The concentrated water in the system is clear, colorless, odorless, and has a relatively small amount of water. It ca...

Embodiment 2

[0109] A certain coal gasification wastewater, raw water COD Cr 2000mg / L~2500mg / L, NH 3 -N is 300mg / L~350mg / L, treated by coal chemical wastewater reuse and zero discharge methods and devices, in which no advanced oxidation process section is used, and the sludge concentration of multi-stage A / O system is 3000mg / L~3500mg / L, the system residence time is 24 hours, and the sludge reflux ratio is 100%. Membrane filtration system 9 produced water COD Cr ≤60mg / L, NH 3 -N≤5mg / L, super efficient reverse osmosis system produced water COD Cr ≤10mg / L, NH 3 -N≤0.5mg / L. Membrane filtration system 9 produces water that is colorless, clear, and odorless, and can be used in production that does not require high water quality; the water produced by the ultra-efficient reverse osmosis system has high water quality and can be used as circulating cooling water or boiler feed water; ultra-efficient reverse osmosis The concentrated water in the system is clear, colorless, odorless, and has a...

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Abstract

The invention provides a method and a device for coal chemical sewage reuse and zero emission. The device comprises: an oil separation tank; an ultramicro air flotation instrument, which is communicated with the oil separation tank; and a multistage A / O system, which consists of: an anaerobic zone communicated with the ultramicro air flotation instrument, an aerobic zone communicated with the anaerobic zone, a precipitation zone communicated with the anaerobic zone, and a stable zone communicated with the precipitation zone; a membrane filtration system, which is communicated with the stable zone and the anaerobic zone; a super-efficient reverse osmosis system, which includes: a hardness removal instrument communicated with the membrane filtration system, a soluble gas removal instrument communicated with the hardness removal instrument, and a membrane filtration instrument communicated with the soluble gas removal instrument; a membrane filtration generated water storage tank, which is communicated with the membrane filtration instrument; a membrane filtration concentrated water storage tank, which is communicated with the membrane filtration instrument; and an evaporation crystallizer, which is communicated with the reverse osmosis concentrated water tank. The device and the method provided by the invention ensure the effluent water quality and no exterior drainage, and truly achieve zero emission.

Description

technical field [0001] The invention relates to the field of industrial water treatment, in particular to a method and device for recycling and zero discharge of coal chemical sewage. Background technique [0002] The coal chemical process is an industry that converts coal into gas, liquid and solid products or semi-products, and then further processes them into chemical and energy products. A new generation of coal chemical industry, with coal gasification as the leader, is a coal clean utilization technology that synthesizes various fuel oils and chemical products. my country is relatively rich in coal resources, and coal is the main source of energy consumption. As the world's petroleum resources continue to decrease, coal chemical industry has broad prospects. [0003] The coal chemical industry project is a high water consumption and high pollution project, with a large amount of wastewater discharge, which is a typical industrial wastewater containing organic compound...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 陈福泰马竞男郝福锦
Owner 北京清大国华膜科技有限公司
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