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

Process for deep concentration of high-concentration brine

A technology of concentrated brine and high brine, applied in water/sewage treatment, water/sludge/sewage treatment, osmotic/dialysis water/sewage treatment, etc., can solve the problem of inability to further improve concentrated brine, reduce costs, reduce effect of water

Pending Publication Date: 2019-07-12
SHANGHAI KAIXIN ISOLATION TECH CO LTD
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the conventional reverse osmosis membrane concentration process concentrates brine to more than 80,000mg / L, the osmotic pressure on both sides of the membrane is very high, and an external pressure of more than 70bar must be applied to overcome the osmotic pressure on both sides of the membrane, and the current common reverse osmosis membrane itself is pressure-resistant The upper limit of 80bar, so can not further enrich the brine

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
  • Process for deep concentration of high-concentration brine
  • Process for deep concentration of high-concentration brine
  • Process for deep concentration of high-concentration brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The TDS of the inlet side of the KFRO membrane is 30000mg / L brine, the main component is sodium chloride and contains a small amount of pollutants, and the operating pressure is 60bar. (Conventional membrane concentration process, TDS can be concentrated to 120000mg / L.) Through the KFRO membrane, it can be one-stage or multi-stage KFRO membrane, and the concentrated brine with TDS of 200000mg / L is obtained. After the concentrated brine is collected, part of the concentrated brine is evaporated and crystallized, and part The concentrated water side of the KFRO membrane enters the KFRO membrane to obtain dilute brine. The dilute brine enters the reverse osmosis membrane, which can be one-stage or multi-stage reverse osmosis, and the filtrate can be reused. The concentrated solution is mixed with brine with a TDS of 30,000mg / L and then enters the KFRO membrane to continue to concentrate.

Embodiment 2

[0067]The TDS of the KFRO membrane inlet side is 70000mg / L brine, the main component is sodium sulfate and contains a small amount of pollutants, and the operating pressure is 65bar. After passing through the KFRO membrane, a concentrated brine with a TDS of 300,000mg / L is obtained. After the concentrated brine is collected, part of it is evaporated and crystallized, and part of it is mixed with dilute brine, and the TDS is 120,000mg / L. It enters the nanofiltration membrane, which can be one-stage or multi-stage nanofiltration, and the filtrate is reused. The dope is mixed with brine with a TDS of 70,000mg / L and then enters the KFRO membrane to continue to concentrate.

Embodiment 3

[0069] The TDS on the inlet side of the KFRO membrane is 100,000mg / L brine, and the operating pressure is 70bar. Through the KFRO membrane, concentrated brine with a TDS of 200,000mg / L is obtained, and the concentrated brine is collected and evaporated to crystallize. The brine concentrated by the reverse osmosis membrane enters the KFRO membrane from the concentrated water side of the KFRO membrane, and the dilute brine obtained enters the reverse osmosis membrane, and the filtrate is reused.

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 relates to a process for deep concentration of high-concentration brine. The process is realized based on a KFRO membrane device. Salt-containing wastewater is introduced from the waterinlet side of the KFRO membrane device, the wastewater flows through the exterior of a membrane bag, and water molecules pass through a membrane, enter the membrane bag, and is collected in a centraltube; concentrated brine is obtained on the concentrated water side of the KFRO membrane device, the high-concentration brine is introduced into the central tube of the KFRO membrane device from the direction opposite to the salt-containing water, flows through the membrane bag, and dilute brine flows out of the other end of the central tube of the KFRO membrane device; and the dilute brine is concentrated through a roll-type membrane device so as to obtain a concentrated liquid and effluent. The salt-containing wastewater and the high-concentration brine are operated in a countercurrent manner, and the source of the high-concentration brine can be the concentrated brine of the KFRO device or a concentrate of the roll-type membrane device, high pressure of 70 bar or above is not required,the high-concentration brine with a mass concentration of 5-10% can be further concentrated into 20%, and the operation energy consumption is far lower than a current common process, so that breakthrough of energy saving of brine concentration is achieved, and a zero emission technology affordable for users is provided.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a process for deep concentration of high-concentration brine. Background technique [0002] High-concentration brine has a high salt content and contains organic matter. If it is directly discharged into the natural environment, it will seriously damage the water quality of groundwater and groundwater. At the same time, it will damage the soil, causing a significant increase in the pH of the land and destroying the growth of surface vegetation. Therefore, it is of great practical significance to choose an appropriate water treatment method to concentrate, reuse and zero-discharge the high-salt wastewater. [0003] The zero-discharge treatment of high-concentration brine usually adopts a combined process of "pretreatment technology-reduction technology-evaporative crystallization". The pretreatment technology is mainly to remove impurities such as hardness, suspended soli...

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 Applications(China)
IPC IPC(8): C02F1/44B01D63/10B01D61/02
CPCC02F1/441C02F1/442B01D63/10B01D61/025B01D61/027
Inventor 葛文越张承慈刘峰程新燕王淑影
Owner SHANGHAI KAIXIN ISOLATION 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