Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for treatment and resource recovery of high-salinity wastewater by bipolar membrane electrodialysis technology

A technology of bipolar membrane electrodialysis and high-salt wastewater, applied in chemical instruments and methods, separation methods, water/sewage treatment, etc., can solve the problems of shortened resin recovery period, rising operating costs, high operating costs, etc., to achieve The effect of reducing equipment investment costs, reducing energy consumption and stable operation

Inactive Publication Date: 2020-05-19
JIANGSU JINGYUAN ENVIRONMENTAL PROTECTION
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, ion exchange and resin adsorption have a good treatment effect on low-concentration salt-containing wastewater, but if the salt content is too high, the recovery period of the resin will be shortened, and the operating cost will rise rapidly
However, reverse osmosis and evaporative crystallization have very strict requirements on the reaction conditions, requiring high temperature and high pressure, and also have ultra-high operating costs.
The above treatment methods for high-salt wastewater have more or less limitations

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 treatment and resource recovery of high-salinity wastewater by bipolar membrane electrodialysis technology
  • Method for treatment and resource recovery of high-salinity wastewater by bipolar membrane electrodialysis technology
  • Method for treatment and resource recovery of high-salinity wastewater by bipolar membrane electrodialysis technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Theoretical value: the amount of sodium sulfate wastewater is 2m 3 / h, acid 150L / h, alkali 50L / h, pure water 21L / h.

[0040] It is given that the circulation ratio of the waste liquid circulation pump is 300%, the circulation ratio of the acid liquid pump is 200%, the circulation ratio of the lye liquid pump is 200%, and the circulation ratio of the pure water pump is 200%. After running for 1 hour, the salt content of the bipolar membrane wastewater tank was measured to be 8500mg / L, the acid mass fraction of the acid circulating water tank was 7.2%, the alkali mass fraction of the lye circulating water tank was 3.5%, and the pure water tank lost 4.5L of pure water.

Embodiment 2

[0042] Same as Example 1, only the circulation ratio of the waste liquid circulating pump in Example 1 is adjusted to 400%, and the bipolar membrane waste water tank has a salt content of 6370 mg / L after running for 1 hour, the acid mass fraction of the acid liquid circulating water tank is 7.3%, and the alkali The alkali mass fraction of the liquid circulating water tank is 3.7%, and the pure water tank loses 4.65L of pure water.

Embodiment 3

[0044] Same as Example 1, only the circulation ratio of the waste liquid circulating pump in Example 1 is adjusted to 500%, and the bipolar membrane waste water tank has a salt content of 5340 mg / L after running for 1 hour, the acid mass fraction of the acid liquid circulating water tank is 7.4%, and the alkali The alkali mass fraction of the liquid circulating water tank is 3.75%, and the pure water tank loses 4.63L of pure 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 a method for treatment and resource recovery of high-salinity wastewater by a bipolar membrane electrodialysis technology. According to the method, a bipolar membrane can efficiently hydrolyze pure water and continuously generate H<+> ions and OH<-> ions, and the H<+> ions and OH<-> ions hydrolyzed in the pure water area respectively enter an acid liquid area and an alkaliliquid area and are combined with anions and cations selected by a single-stage membrane to generate an acid and an alkali; an alkali liquor production area, a pure water reaction area, an acid liquorproduction area and a high-salinity wastewater area are respectively circulated through pumps, wherein the optimal circulation ratio is 500%, and the operation energy consumption is reduced by 15-20%; and the high-salinity wastewater treated by a coupled bipolar membrane electrodialysis system is converted into low-salinity wastewater, the low-salinity wastewater enters conventional treatment, and final products of an acid liquor and an alkali liquor are recovered, so that resource utilization of the high-salinity wastewater is achieved.

Description

technical field [0001] The invention relates to the technical field of high-salt wastewater treatment in the field of coal chemical industry, in particular to a method for treating high-salt wastewater by bipolar membrane electrodialysis technology and performing resource recovery. Background technique [0002] The high-salt wastewater produced in the production process of the coal chemical industry is recognized as difficult wastewater in the wastewater treatment industry. Its main feature is its complex chemical composition and high salt content. The main components include, for example, sodium chloride, ammonium chloride, ammonium sulfate, sodium sulfate or various mixed salts. In a large domestic coal enterprise, the coal-to-natural gas project needs to be supplemented with fresh water, and the amount of salt brought in during this process has exceeded half of the salt in the system. At the same time, chemicals are added to the production process and water system During...

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): C02F1/469
CPCC02F1/4693
Inventor 周宇亮李武林季献华姚志全李宽王辰徐俊秀季晓艳方伟杰袁志清朱军
Owner JIANGSU JINGYUAN ENVIRONMENTAL PROTECTION
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com