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

A method for treating waste water containing phenolic sodium sulfate from tar refining with environmental protection and low energy consumption

A technology for sodium phenol sulfate and waste water treatment, which is applied in multi-stage water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. The effect of no secondary pollution and low energy consumption

Active Publication Date: 2021-06-29
SHANGHAI LYMAX ENVIRONMENTAL TECH CO LTD
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the purpose of this invention is to provide a treatment method for tar refining sodium sulphate containing phenol wastewater, the purpose of which is to solve the problem of high energy consumption and easy generation of secondary pollution and other issues

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
  • A method for treating waste water containing phenolic sodium sulfate from tar refining with environmental protection and low energy consumption
  • A method for treating waste water containing phenolic sodium sulfate from tar refining with environmental protection and low energy consumption

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] Example 1, the quality of the wastewater to be treated is as follows:

[0033]

[0034] Using the waste water treatment process of the present invention, successively undergo demulsification and gravity oil separation, further oil removal by air flotation, complete oil removal by coke filtration, fine filtration to remove suspended solids and colloids, freezing and crystallization at 0-5°C to precipitate sodium sulfate decahydrate, Separation and recovery of the phenol-rich solution in the upper layer, centrifugal purification of sodium sulfate decahydrate crystals, redissolution of sodium sulfate decahydrate crystals, further purification by evaporation and crystallization, and disc drying and dehydration drying, can obtain high-purity anhydrous sodium sulfate. The grade quality of sodium sulfate reaches The national standard GB6009-2014III qualified products require that the upper phenol-containing solution obtained by freezing and separating and the distilled water...

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 an environment-friendly and low-energy-consumption tar-refined phenol-containing sodium sulfate wastewater treatment method. After the tar-refined phenol-containing sodium sulfate wastewater is pretreated to remove oil, suspended matter and colloid, the sulfuric acid decahydrate is frozen and precipitated in the freezing crystallizer. Sodium crystals are then centrifuged, re-dissolved, evaporated and dehydrated to obtain high-purity anhydrous sodium sulfate. The waste heat of evaporation and dehydration and some distilled water enter the concentrated nitric acid tank for dissolving nitric acid to fully recover resources; the upper layer separated after freezing The phenol-containing solution is extracted and dephenolized, electrode oxidized and biochemically treated, and the clear liquid obtained by nanofiltration membrane separation and part of the distilled water produced by evaporation and dehydration are transported to the biochemical treatment device for reuse. The whole process of this process has low energy consumption, zero discharge and no secondary pollution.

Description

technical field [0001] The invention relates to the field of environmental protection wastewater treatment, in particular to a method and process for treating tar-refined phenol-containing wastewater. Background technique [0002] The sodium sulfate wastewater produced during the tar refining process is a high-salt phenol-containing process wastewater produced in the crude phenol extraction process. macrocyclic and heterocyclic substances, and there is a certain amount of tar-like substances in the wastewater. [0003] Conventional treatment methods mainly include biological oxidation, adsorption and solvent extraction. The biological oxidation method treats phenol-containing wastewater, and the phenol content should be less than 300ppm. If the phenol concentration is too high, it will directly inhibit and kill microorganisms. At the same time, this method is highly sensitive to external changes, and the treatment equipment occupies a large area, and the investment and oper...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/34
CPCC02F1/001C02F1/048C02F1/22C02F1/24C02F1/26C02F1/38C02F1/40C02F1/44C02F1/4672C02F1/72C02F3/00C02F9/00C02F2101/101C02F2101/345C02F2301/08
Inventor 傅立德彭美桂王海军陈伟
Owner SHANGHAI LYMAX ENVIRONMENTAL TECH CO LTD
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