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A coking wastewater advanced treatment process and its treatment system

A technology for coking wastewater and advanced treatment, applied in multi-stage water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. The process is simple, the energy saving effect is obvious, and the operating cost is low.

Active Publication Date: 2019-01-04
JINNENG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process can only remove part of the organic matter and its color, and will produce other by-products, causing secondary pollution of the system
And its processing technology is not mature, the equipment cost is relatively expensive, the operating cost is high, and the efficiency is relatively low

Method used

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  • A coking wastewater advanced treatment process and its treatment system
  • A coking wastewater advanced treatment process and its treatment system

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] The invention provides an advanced treatment process of coking wastewater, which can decompose the coking wastewater with TDS in the range of 2000-5000 mg / L and COD in the range of 200-100 mg / L into coking wastewater with COD≤30 mg / L by repeatedly spraying and evaporating the coking wastewater. Distilled water and a concentrated solution with a concentration of 5-6%, and finally the obtained distilled water is used for circulating water, and the obtained concentrated solution is used for coal blending and coking, realizing the closed loop and zero discharge of coking wastewater. Specifically, the coking wastewater advanced treatment process of the present invention comprises the following steps:

[0034] a. Pretreat the coking wastewater with a TDS of 2000-5000mg / L and a COD of 200-1000mg / L to obtain a supernatant with sediment...

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Abstract

The invention discloses a coking wastewater treatment process and a processing system, which are easy to implement and stable for operation. The process can repeatedly conduct spraying film evaporation on the coking wastewater to obtain distilled water with COD of no more than 30mg / L and a concentrate with concentration of 5-6%; the distilled water is eventually used for circulating water, and the concentrate is used for coal blending and coking, so as to realize the closed cycle of coking wastewater and zero emission of coking wastewater. In the repeated spraying film evaporation of coking wastewater, the steam obtained by spraying film evaporation is compressed by a steam compressor, heated and delivered to a heating chamber of a one-effect evaporator as heating steam, and no additional heating steam is needed. The system has low operation cost and obvious energy-saving effect.

Description

technical field [0001] The invention relates to a wastewater advanced treatment process, and mainly relates to a coking wastewater treatment process in the field of coal chemical industry. [0002] The present invention also relates to a treatment system for realizing the above coking wastewater treatment process. Background technique [0003] The coking wastewater produced in the production process of coal chemical enterprises has complex components, and is a toxic, harmful, and refractory high-concentration organic wastewater. It is very difficult to treat and has always been a technical problem in the field of wastewater treatment at home and abroad. At present, various treatment processes are used, mainly focusing on membrane separation, chemical oxidation and other processes. [0004] The membrane separation process uses a multi-vacuum filter membrane for separation, and its mechanism is to use the difference in affinity between the two phases in the liquid-liquid disp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/08
CPCC02F1/001C02F1/043C02F1/048C02F1/08C02F1/52C02F9/00C02F2301/08C02F2303/22Y02P20/10
Inventor 范安林刘红伟王恩龙刘澜清
Owner JINNENG SCI & TECH