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A zero-discharge process for advanced treatment of coking sewage

A coking sewage and advanced treatment technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of direct discharge, supplementary dilution water, etc., to ensure water quality, The effect of reducing the amount of water and reducing the amount of sludge treatment

Active Publication Date: 2016-01-20
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] For the existing coking sewage treatment system, there is a lot of supplementary dilution water, and it is directly discharged after treatment, etc.
The purpose of the present invention is to overcome the deficiencies of the existing system and solve the problems of coking sewage reduction and harmless recycling

Method used

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  • A zero-discharge process for advanced treatment of coking sewage
  • A zero-discharge process for advanced treatment of coking sewage

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Embodiment Construction

[0022] Attached below figure 1 The present invention is described in detail with embodiment.

[0023] See attached figure 1 , according to a complete set of process scheme for the advanced treatment of coking sewage of the present invention, the treatment process is carried out as follows:

[0024] (1) After the coking sewage is steamed and dephenolized, it enters the adjustment tank, and then is pumped to the internal electrolysis pretreatment system for iron-carbon internal electrolysis and biological anaerobic reaction, reducing the COD of the coking sewage raw water and improving the B of the sewage. / C ratio.

[0025] (2) The coking sewage after internal electrolysis enters the anoxic tank and aerobic tank for A / O biochemical reaction, and then enters the secondary sedimentation tank and post-coagulation tank to further remove colloids, turbidity and chromaticity, and part of the biochemical effluent is refluxed As an aerobic pool defoaming water.

[0026] (3) The cok...

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Abstract

The invention relates to an advanced treatment and zero emission process for coking wastewater. The process comprises the following steps: performing ammonia stilling and dephenolizing on the coking wastewater, allowing the treated coking wastewater to enter a regulation pond, conveying the wastewater to an inner electrolysis intensified pretreatment system by using a pump, wherein the inner electrolysis intensified pretreatment system forms an anaerobic biofilter through iron carbon inner electrolysis fillers, and carrying out an iron carbon inner electrolysis reaction and a biological anaerobic reaction; and allowing the wastewater to sequentially enter an anoxic pool and an aerobic pool for carrying out an A / O biological reaction, then allowing the wastewater to enter a secondary sedimentation tank and a later coagulating basin, and further performing advanced treatment on the wastewater in a three-dimensional electrode reactor and an ultrafiltration reverse osmosis treatment system. The coked reverse osmosis concentrated water is treated in a concentrated water recycling system, and zero emission of the coking wastewater is achieved. The process has the aims that dilution water is not added in the conventional coking wastewater treatment process, the coking wastewater subjected to biochemical treatment is subjected to advanced treatment for recycling, and reduction, harmlessness and recycling of the coking wastewater are realized.

Description

technical field [0001] The invention relates to a process for advanced treatment of sewage, in particular to a process for advanced treatment of coking sewage with zero discharge. Background technique [0002] Coking sewage is the sewage produced in the process of high-temperature dry distillation of coal, gas purification and refining of chemical products. There are three main sources: one is residual ammonia water, which is the sewage produced in coal dry distillation and gas cooling, and its water volume accounts for more than half of the total coking sewage, which is the main source of coking sewage; the other is produced in the process of gas purification sewage, such as gas final cooling water and crude benzene separation water; the third is sewage produced in the process of tar and crude benzene refining. Coking sewage contains a large amount of refractory organic pollutants with complex components. The sewage contains many highly polluting and refractory organic sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 王海东高康乐张帆赵锐锐逯博特孙玉亮李红石宇贾博中周王斌邱鹏程旸张兴华朱纯纯
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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