A method and device for removing phenols from phenol-containing wastewater produced by phenol refining

A technology for phenol wastewater and dephenolization, which can be used in chemical instruments and methods, water pollutants, multi-stage treatment of water/sewage, etc., and can solve the problem of high cost of dephenolization technology

Active Publication Date: 2019-07-16
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of the high cost of the existing technology for dephenolizing phenol-containing wastewater from phenol refining, the purpose of the present invention is to provide a method and device for dephenolizing phenol-containing wastewater produced by phenol refining, and propose a method that does not need to purchase additional chemical auxiliary materials Treatment method of phenol-containing wastewater from phenol refining

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  • A method and device for removing phenols from phenol-containing wastewater produced by phenol refining
  • A method and device for removing phenols from phenol-containing wastewater produced by phenol refining
  • A method and device for removing phenols from phenol-containing wastewater produced by phenol refining

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Embodiment 1

[0042] As shown in the accompanying drawing, a process flow diagram of a method for dephenolizing phenol-containing wastewater from phenol purification, the process of the method for dephenolizing phenol-containing wastewater from phenol purification, one of which is extraction and dephenolization of phenol-refined phenol-containing wastewater, and the other is, Rich oil stripping to remove phenols. The process of extracting and dephenolizing the phenol-containing waste water from phenol refining is realized by static mixer 1, oil-water separator 2, oil-rich pump 3, and waste water pump 4; , Light oil circulation pump 7 equipment realization.

[0043] A method for removing phenols from phenol-containing waste water produced by phenol refining, comprising the steps of:

[0044] (1) The process of extracting and dephenolizing the phenol-containing waste water from the phenol-refined phenol-containing wastewater is realized in that the phenol-refined phenol-containing waste water ...

Embodiment 2

[0047] The method for dephenolizing the phenol-containing wastewater produced by phenol refining provided by the present invention comprises a static mixer 1, the static mixer 1 is connected with the oil-water separator 2 through a pipeline, and the outlet of the dephenol-containing wastewater is set at the bottom of the oil-water separator 2, An oil-rich outlet is set on the top of the oil-water separator 2, and the oil-rich outlet is connected to the light oil washing tower 5 through a pipeline. The top of the clean tower 5 is connected with the cooler 6 through the light oil circulation pump 7, and the cooler 6 is connected with the static mixer 1 again, and the neutral phenol sodium salt outlet is set at the bottom of the light oil wash tower 5; The outlet is connected with the waste water pump 4 through a pipeline.

[0048] A method for removing phenols from phenol-containing waste water produced by phenol refining, comprising the steps of:

[0049] (1) The process of ex...

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Abstract

The invention provides a method and an apparatus for dephenolizing phenol-containing waste water generated by phenol refining. The method comprises a dephenolizing process for extraction of waste water and a dephenolizing process for stripping of rich oil. Light Oil for dephenolizing in the prior light oil washing process is used as an extractant, the extractant is used for extracting the phenol-containing waste water in order to remove phenol, after extraction, the rich oil returns to a light oil washing tower for carrying out stripping, a reaction is carried out between free alkali in sodium phenolate and phenol in the rich oil for recovery of sodium phenolate, and after dephenolization, the waste water is sent to a gas purifying and waste water treatment system. The method has the advantages of compact and concise process, low cost of equipment investment without accessory consumption, high cyclic utilization rate of the extractant for dephenolization of waste water, high oil removing rate during dephenolization of the waste water, increased of quality of sodium phenolate from the fraction dephenolizing apparatus, reduced sulfuric acid consumption of a phenate decomposition apparatus, and the like.

Description

technical field [0001] The invention belongs to the technical field of industrial treatment of phenol-containing wastewater in coal chemical industry, and specifically relates to a method and device for removing phenols from phenol-refined high-concentration phenol-containing wastewater Background technique [0002] In the phenol refining production process of extracting crude phenol from coal tar, a large amount of high-concentration phenol-containing wastewater will be produced. Phenol is a highly toxic and refractory organic matter in the wastewater. greater impact. There are many existing technologies for the treatment of phenol refining wastewater, and the technology close to the patent application of the present invention is the Chinese invention patent "coal tar wastewater treatment method and system" (application publication number CN 101875523 A), and its technical characteristics are: 1) Removal of wastewater For free oil and emulsified oil, 2) use N-503 extractan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/26C02F101/34
Inventor 陈年连马元想邵忠平艾德跃黄森
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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