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Near-zero emission tail water treatment method of wastewater in coal chemical industry

A technology for industrial wastewater and process methods, which is applied in the directions of oxidized water/sewage treatment, water/sewage treatment, biological water/sewage treatment, etc., to achieve the effects of environmental friendliness, high recycling rate, and burden reduction.

Inactive Publication Date: 2018-11-06
江苏源拓环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a process method with more sufficient reuse of waste resources, lower treatment cost, and no liquid discharge of waste water for the waste liquid that cannot be treated at the end of the prior art.

Method used

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  • Near-zero emission tail water treatment method of wastewater in coal chemical industry
  • Near-zero emission tail water treatment method of wastewater in coal chemical industry

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Embodiment 1

[0024] In order to make the process method and advantages of the present invention more clear, this embodiment combines the actual characteristics of coal chemical industry wastewater, and adopts the method of direct drying to treat the evaporation and crystallization tail water. Compared with the outsourced treatment of tail water, it reduces the total treatment cost, realizes the complete zero discharge of waste liquid, increases the reuse rate of distilled water, and saves water resources.

[0025] In the example, the high-salt and high-organic-matter wastewater mainly includes sodium chloride, sodium sulfate, etc., and the organic matter components are mainly long-chain refractory components. Examples use saturated or superheated steam as a heat source. The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] In the embodiment, the main process of waste water adopts nanofiltration to separate salts. The monova...

Embodiment 2

[0031] In order to make the process method and advantages of the present invention clearer, this embodiment combines the actual characteristics of coal chemical industry wastewater, and adopts the method of cooling crystallization to purify part of the auxiliary salt and then drying to treat the evaporation crystallization tail water. Compared with the outsourced treatment of tail water, it reduces the total treatment cost, realizes the complete zero discharge of waste liquid, increases the reuse rate of distilled water, saves water resources, and recovers some auxiliary salts.

[0032] In the embodiment, the high-salt and high-organic waste water mainly contains sodium chloride, sodium sulfate, etc., and contains a small amount of sodium nitrate. The organic components are mainly long-chain refractory components. Examples use saturated or superheated steam as a heat source. The present invention will be described in further detail below in conjunction with the accompanying dr...

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Abstract

The invention provides a technique method which can realize more sufficient waste resource reutilization, lower treatment cost and completely wastewater-free liquid-state emission for waste liquor which cannot be treated at the tail end after industrial wastewater with high salinity and high organic matter is treated with the prior art. The method is characterized in that a cooling / freezing crystallization unit and a drying and curing unit are included, recycling of valuable components in wastewater can be realized, and complete zero emission of waste liquor is realized. The method can thoroughly realize liquid-state zero emission of wastewater and is more environmentally friendly. Non-main component salts in the wastewater are additionally extracted, reach the industrial standard and canbe sold, and extra economic benefits are increased. By means of the method, the use times of tail water are reduced and the system stability is higher. The reuse rate of water in the wastewater is higher and approaches 100%, and a large quantity of water resources are saved. No wastewater is outsourced and the total tretament cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of crystallization and solidification treatment of high-salt and high-organic waste water in coal chemical industry, petrochemical industry, power desulfurization, landfill leachate and other industries, and specifically relates to a process and method for reprocessing tail water after crystallization. Background technique [0002] my country's natural resource storage form determines that my country's current main form of energy is coal. Coal chemical industry, coal coking, and power plants, which use coal as the main energy source, are all industrial wastewater with high salt and organic content. The direct discharge or substandard discharge of such wastewater has caused serious damage to the human ecological environment irreversible damage. [0003] At present, domestic waste water with high salinity and high organic matter can be separated and one or two main salts can be extracted and purified to the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F9/10
CPCC02F1/04C02F1/22C02F1/441C02F1/442C02F1/52C02F1/72C02F3/00C02F9/00C02F2001/5218
Inventor 孙家喜王前
Owner 江苏源拓环境科技有限公司
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