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

Membrane type brackish water softening method based on magnetic pretreating technology

A brackish water, pretreatment technology, applied in chemical instruments and methods, filtration treatment, water/sewage treatment, etc., can solve the problem of deposition on pipe walls or magnets, aggravate membrane surface pollution, and increase the risk of membrane process operation. and other problems, to achieve the effect of good effluent quality, reduction of chemical cleaning times, considerable economic benefits and environmental protection benefits

Inactive Publication Date: 2017-10-20
HENAN NORMAL UNIV
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with the publication number CN102806017A discloses a magnetic separator and a method for controlling inorganic pollution of high-pressure membranes. The article mentions the membrane pretreatment method of magnetic separation technology. The disadvantage of this technology is that the feed water after magnetization pretreatment Form loose scale, which will be deposited on the tube wall or magnet, and new large particles may be generated in the product water, which will aggravate membrane surface pollution and increase the risk of subsequent membrane process operation

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
  • Membrane type brackish water softening method based on magnetic pretreating technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]The bicarbonate-sulphate type brackish water sample at the junction of the North China piedmont alluvial plain and the central alluvial plain was drawn into the stainless steel water inlet tank, and the TDS and pH values ​​of the brackish water were 1000 mg·L, respectively. −1 and 6.80, Ca 2+ , Mg 2+ , SO 4 2− 、HCO 3 − Concentrations are 70mg·L −1 , 40mg·L −1 , 106mg·L −1 and 112mg·L −1 . The 5 groups of magnetic processing units corresponding to the upper and lower sides are arranged correspondingly along the axis. The magnetic material of the magnetic processing unit is permanent magnet material. The yoke is made of soft iron, A3 steel or soft magnetic alloy with relatively high magnetic permeability, and the gap is filled with stainless steel. The diameter of wool and steel wool is 30 μm, the filling rate is 2%, the average magnetic field strength of the entire magnetic field area is 0.86T, so that the incoming water circulates in the upper and lower magnetic...

Embodiment 2

[0027] The bicarbonate-sulphate type brackish water sample at the junction of the North China piedmont alluvial plain and the central alluvial plain is drawn into the stainless steel water inlet tank, and the TDS and pH values ​​of the brackish water are 4000mg·L respectively −1 and 9.50, Ca 2+ , Mg 2+ , SO 4 2− 、HCO 3 − Concentrations are 150mg·L −1 , 80mg·L −1 , 300mg·L −1 and 350mg·L −1 . The 10 groups of magnetic processing units corresponding to the upper and lower sides are arranged correspondingly along the axis. The magnetic processing unit can be made of soft magnetic materials. This type of magnetic material has high magnetic permeability and magnetic induction intensity. The loss should be small. The yoke can be made of an alloy with a relatively high magnetic permeability, and the gap is filled with filamentous or mesh-like magnetic gathering material or steel wool with a diameter of 10 μm, the filling rate is 10%, and the average magnetic field strength ...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
retention rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a membrane type brackish water softening method based on a magnetic pretreating technology. The method is characterized in that brackish water is fed into an ultrasonic washing device through a feeding pump, wherein a magnetic field system is arranged in the ultrasonic washing device; the ultrasonic washing device is started in a fixed time to remove impurities on the tube wall and the surface of a magnetic treating unit in a fixed time; water subjected to magnetic pretreating and ultrasonic separating is fed into a self-washing filtering device through a booster pump so as to be filtered; the water filtered by the self-washing filtering device is fed into a nanofiltration membrane assembly through a high-pressure pump to be filtered and separated; when the operation reaches the set time or the flux of water produced by the nanofiltration membrane decreases to reach the set value, some water subjected to nanofiltration is returned to the nanofiltration membrane assembly for physical flushing so as to remove loose pollutants on the surface of the nanofiltration membrane. According to the method, the ultrasonic-magnetic pretreating and nanofiltration membrane hybrid coupling technology is adopted to realize efficient softening of brackish water; the system stopping time caused by membrane washing is reduced by 30%, so that the operation cost can be decreased.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for softening brackish water by membrane method based on magnetization pretreatment technology. Background technique [0002] In my country, brackish water is widely distributed. According to incomplete statistics, about 38 million people in my country drink brackish water. The excessive salts and impurities in it are very harmful to human body and seriously affect the quality of life and health. In addition, brackish water is also very harmful to industrial and agricultural production, affecting soil air permeability and water retention. Membrane technology is introduced into the desalination of brackish water, which can remove harmful substances to the greatest extent. However, the problem of membrane fouling seriously affects the separation effect of this technology, which limits the further development and application of membrane separation techn...

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): C02F9/12
CPCC02F1/001C02F1/442C02F1/481C02F9/00
Inventor 宋跃飞赵果李铁梅秦文博高海荣王雍鑫陈鑫鑫
Owner HENAN NORMAL UNIV
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