Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for dephenolization of phenolic wastewater through multi-stage mixed intensified separation

A technology for strengthening separation and phenol wastewater, applied in separation methods, chemical instruments and methods, solvent extraction, etc., can solve the problems of increasing energy consumption of extracting agent by stripping and recovering, large amount of extraction of raffinate phase, and difficult control of separation interface, etc. Achieve the effects of easy online analysis and automatic control, fast mass transfer balance, and avoidance of back-mixing

Active Publication Date: 2017-06-20
CCTEG CHINA COAL RES INST
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the extraction unit of phenol-containing wastewater in the industrial field is usually carried out in the extraction tower, mainly the packed extraction tower and the rotary disk extraction tower, both of which have relatively serious inter-stage back mixing, resulting in low stage efficiency and difficult control of the separation interface. , the raffinate phase takes away a large amount of extraction, which increases the energy consumption of the extraction agent recovered by stripping, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for dephenolization of phenolic wastewater through multi-stage mixed intensified separation
  • Method for dephenolization of phenolic wastewater through multi-stage mixed intensified separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1, extraction and dephenolization of coal chemical industry phenolic waste water

[0039] according to figure 2 The process flow chart shown in the process extracts and removes phenols from coal chemical industry wastewater containing phenols. The specific steps are as follows:

[0040](1) The extractant (methyl isobutyl ketone) with a volume ratio of 1:6 and phenol-containing wastewater (total phenol 5750mg / L, polyphenol 1820mg / L, COD content 19340mg / L, pH value 8.0) by reverse The direction is sent to a multi-stage extraction device connected in series with 5 high-gravity extractors for multi-stage countercurrent extraction (level 5), and the final extraction phase (containing crude phenol and extractant) and the final raffinate phase (wastewater containing a small amount of extractant) are collected. );

[0041] Every high-gravity extractor comprises a mixing chamber (1) and an enhanced separation chamber (2), and the extractant and the phenol-containin...

Embodiment 2

[0044] Embodiment 2, extraction and dephenolization of coal chemical industry phenolic wastewater

[0045] according to figure 2 The process flow chart shown in the process extracts and removes phenols from coal chemical industry wastewater containing phenols. The specific steps are as follows:

[0046] (1) The extractant (methyl isobutyl ketone) with a volume ratio of 1:4 and phenol-containing wastewater (total phenol 5750mg / L, polyphenol 1820mg / L, COD content 19340mg / L, pH value 8.0) by reverse The direction is sent to a multi-stage extraction device connected in series with 3 high-gravity extractors for multi-stage countercurrent extraction (3 stages), and the final extraction phase (containing crude phenol and extractant) and the final raffinate phase (wastewater containing a small amount of extractant) are collected. );

[0047] Every high-gravity extractor comprises a mixing chamber (1) and an enhanced separation chamber (2), and the extractant and the phenol-containi...

Embodiment 3

[0050] Example 3, Extraction and dephenolization of coal chemical industry phenolic wastewater

[0051] according to figure 2 The process flow chart shown in the process extracts and removes phenols from coal chemical industry wastewater containing phenols. The specific steps are as follows:

[0052] (1) The extractant (methyl isobutyl ketone) with a volume ratio of 1:8 and phenol-containing wastewater (total phenol 5750mg / L, polyphenol 1820mg / L, COD content 19340mg / L, pH value 7.0) by reverse The direction is sent to a multi-stage extraction device connected in series with 7 high-gravity extractors for multi-stage countercurrent extraction (7 stages), and the final extraction phase (containing crude phenol and extractant) and the final raffinate phase (wastewater containing a small amount of extractant) are collected. );

[0053] Every high-gravity extractor comprises a mixing chamber (1) and an enhanced separation chamber (2), and the extractant and the phenol-containing ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for dephenolization of phenolic wastewater through multi-stage mixed intensified separation. The method comprises the following steps: (1) conveying an extraction agent and phenolic wastewater into a multi-stage extraction device consisting of a plurality of supergravity extractors in an opposite direction, performing multi-stage counter-current extraction, and collecting a final extraction phase and a final raffinate; and (2) feeding the final raffinate into a solvent recycling tower, performing solvent recycling I so as to obtain crude phenol and an extraction agent I; feeding the final raffinate into a solvent steam stripping tower, performing solvent recycling II so as to obtain wastewater after dephenolization and an extraction agent II; continuously introducing the extraction agent I and the extraction agent II into the multi-stage extraction device, and performing multi-stage counter-current extraction with the phenolic wastewater. By adopting an extraction process, two-phase separation is achieved through supergravity, and good phase separation properties and large treatment capacities can be achieved; by adopting a powerless spiral or eddy mixer, rapid mass transfer balance of two phases can be achieved, the mass transfer efficiency is high, and the stage efficiency is approximate to 100%.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a method for extracting and removing phenols from phenol-containing wastewater with multistage mixing and enhanced separation. Background technique [0002] Phenolic substances in wastewater are toxic to organisms and inhibit the growth of microorganisms, resulting in unstable and efficient operation of biochemical systems. However, as chemicals, phenols can be recycled. At present, the commonly used method for phenol-containing industrial wastewater is to remove phenolic substances by solvent extraction to improve the biodegradability of wastewater. Using the principle of similar compatibility, most of the phenolic substances enter the extraction phase and obtain crude phenolic products through rectification separation. The extractant is recycled, and the extractant left in the raffinate phase is stripped and recycled by the solvent stripper. At present, the extr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/26B01D11/04C02F101/34
CPCB01D11/0488B01D11/0492C02F1/26C02F2101/345
Inventor 陈贵锋高明龙董卫果杜松王吉坤段锋付楚芮贾媛田陆峰王亚强
Owner CCTEG CHINA COAL RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com