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Coal chemical industry wastewater zero-discharge integrated treatment system and method

A technology of coal chemical wastewater treatment system, applied in oxidation water/sewage treatment, water/sewage treatment, aerobic process treatment, etc., can solve problems such as wastewater pollution, and achieve technically reliable results

Inactive Publication Date: 2020-11-03
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a zero-discharge integrated treatment system and method for coal chemical industry wastewater in view of the pollution problem of wastewater after coal chemical industry treatment

Method used

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  • Coal chemical industry wastewater zero-discharge integrated treatment system and method

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Embodiment

[0068] In this embodiment, coal-to-oil 300m 3 / h waste water as an example, carry out the application test, after 7 days of stable operation, carry out the water quality test, refer to the treatment process figure 1 and the following method. See Table 1 below for the quality of influent and effluent water.

[0069]S1: First, adjust the pH of coal-to-oil wastewater to about 6, use a closed grease trap to remove coal-to-oil tar, tar residue, slick oil and suspended solids from the wastewater, and the wastewater treated by the grease trap enters the demulsification process Add demulsifier and reverse phase demulsifier to the drug mixer to destroy the stability of the emulsified oil in the water, and the demulsified wastewater passes through a high-precision oil-water separator to complete the removal of residual oil in the wastewater.

[0070] S2: Pass the air into the waste water to form tiny air bubbles, so that the suspended particles in the waste water adhere to them and be...

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Abstract

The present invention provides a zero-discharge integrated treatment system. The system comprises: an oil removal unit, an air floatation turbidity removal unit, a phenol ammonia recovery unit, a biochemical unit, an ozone catalytic oxidation unit, a hardness and silicon removal unit, an ultrafiltration turbidity removal unit, a membrane concentration unit and a salt separation crystallization unit, which are connected in sequence. The invention also discloses a coal chemical industry wastewater zero-discharge integrated treatment method adopting the treatment system.

Description

technical field [0001] The invention relates to the technical field of coal chemical wastewater treatment, in particular to a zero-discharge integrated treatment system and method for coal chemical wastewater. Background technique [0002] While coal chemical production consumes a large amount of fresh water, it also produces a large amount of wastewater every year. For areas with severe shortage of water resources, the current situation of coal chemical production is not optimistic. Coal chemical industry wastewater mainly comes from processes such as coal gasification, coal liquefaction, and coal coking. This type of wastewater has a large amount of water, complex water quality, and contains a large amount of organic pollutants, phenol, sulfur, and ammonia, as well as a large amount of biphenyl, pyridine, Toxic pollutants such as indole and quinoline are highly toxic. With the increasingly prominent environmental problems and the increasingly serious energy shortage, the...

Claims

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Application Information

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IPC IPC(8): C02F9/14C01D3/04C01D3/14C01D5/00C01D5/16C02F101/10C02F101/16C02F101/18C02F101/30C02F101/32C02F101/34C02F103/34
CPCC01D3/04C01D3/14C01D5/00C01D5/16C02F1/04C02F1/20C02F1/24C02F1/26C02F1/40C02F1/441C02F1/442C02F1/444C02F1/4693C02F1/5236C02F1/56C02F1/58C02F1/586C02F1/66C02F1/725C02F1/78C02F3/02C02F3/28C02F3/286C02F3/302C02F3/34C02F5/00C02F5/08C02F9/00C02F2101/10C02F2101/101C02F2101/16C02F2101/18C02F2101/30C02F2101/32C02F2101/345C02F2103/34
Inventor 左剑恶曾凡付
Owner TSINGHUA UNIV
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