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Coal tar processing wastewater treatment method and system

A technology for processing wastewater and treatment methods, which is applied in the fields of degassed water/sewage treatment, extraction water/sewage treatment, neutralized water/sewage treatment, etc. The effect of convenience and simple equipment structure

Active Publication Date: 2010-11-03
高科环保工程集团有限公司
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Problems solved by technology

[0002] It is well known that the wastewater discharged from coal tar processing projects contains a large amount of COD, NH 3 -N, phenol, oil, and quinoline, pyridine, carbazole, cyanide, biphenyl and other toxic and harmful substances are typical high-concentration refractory organic chemical wastewater, which cannot be achieved by simply applying general wastewater treatment methods Discharge

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  • Coal tar processing wastewater treatment method and system
  • Coal tar processing wastewater treatment method and system
  • Coal tar processing wastewater treatment method and system

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Embodiment Construction

[0027] The treatment method and treatment system provided by the invention are used for treating the waste water produced in the coal tar processing process. The treatment method includes a physicochemical treatment process, preferably, a combination of physicochemical treatment and secondary biochemical treatment. Because the physicochemical treatment method has the characteristics of high pollutant removal efficiency and stable and reliable operation, but the operating cost is high; law is much lower. The invention creatively adopts the physicochemical method to pretreat the coal tar processing waste water to make it reach the acceptable level of the biochemical treatment, and then uses the biochemical method for further treatment to make it discharge up to the standard. There are many well-known methods and systems for biochemical treatment, which will not be repeated here. Only the physicochemical treatment method will be described in detail below.

[0028] It is well k...

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Abstract

The invention relates to coal tar processing wastewater treatment method and system. The treatment method comprises materialization treatment comprising the following steps of: (1) removing free oil and emulsified oil which are contained in wastewater, filtering, regulating the pH value of the wastewater to 3-4, and then separating out depositions; (2) extracting and dephenolizing; (3) regulatingthe pH value of the dephenolized wastewater to 9-10, filtering, then carrying out steam stripping and deaminization by using steam, and besides, carrying out reextraction on extract phase containing phenol to respectively recover an extracting agent and phenate, and then recycling the extracting agent and decomposing the phenate to obtain crude phenol; and (4) cooling the deaminized wastewater, regulating the pH value to 7-8, and then filtering after adding a desulfurizing agent to remove sulfides. The water quality of the materialized wastewater achieves the requirement of a biochemical treatment system; meanwhile, the invention can recover a given amount of useful matter comprising the phenol, ammonia and the like and make the extracting agent recycled so that the economic benefit of wastewater treatment is improved.

Description

technical field [0001] The invention relates to a method and system for treating waste water from coal tar processing. Background technique [0002] It is well known that the wastewater discharged from coal tar processing projects contains a large amount of COD and NH. 3 -N, phenol, oil, and various toxic and harmful substances such as quinoline, pyridine, carbazole, cyanide, biphenyl, etc., are typical high-concentration refractory organic chemical wastewater, which cannot be achieved by ordinary wastewater treatment methods alone. Discharge. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a treatment method which can simply and efficiently remove harmful substances in coal tar processing wastewater and recover valuable substances such as phenol and ammonia. [0004] Another object of the present invention is to provide a processing system implementing the processing method. [0005] The method for treating wastewater from coal tar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F9/14C02F1/40C02F1/66C02F1/26C02F1/20
Inventor 柯景诗
Owner 高科环保工程集团有限公司
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