Water processing method

A water treatment and water treatment technology, applied in the direction of osmosis/dialysis water/sewage treatment, etc., can solve the problems of increasing the frequency of chemical cleaning, reducing production efficiency, increasing costs, etc., achieving obvious industrial implementation feasibility, improving effect, reducing The effect of production costs

Inactive Publication Date: 2013-06-05
TIANJIN POLYTECHNIC UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the commonly used membrane materials (cellulose acetate, polyvinylidene fluoride, polypropylene, polysulfone, etc.), the microporous structure (pore size and porosity) is relatively stable, and the effect of removing pollutants by physical cleaning is poor. Or indirectly increase the frequency of chemical cleaning, reduce production efficiency and increase cost

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
  • Water processing method
  • Water processing method
  • Water processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use inorganic powder (particle size distribution between 1-30μm, of which 87.16% of the pores are concentrated between 4-25μm) to disperse in water to form a suspension as the filtered stock solution to investigate polyurethane elastic hollow fiber membranes (pore size distribution Between 0.08-0.28μm, of which 76.36% of the pores are concentrated between 0.18-0.22μm) used under external pressure conditions, and the flux recovery after backwashing under internal pressure conditions.

[0020] The test conditions are as follows:

[0021] The polyurethane-based elastic hollow fiber membrane is cast into a U-shaped groove submerged membrane module, and the suction filtration method is used for external pressure filtration. The inner membrane area of ​​the module is about 8.64×10 -2 m 2 ;

[0022] The concentration of the filtered stock solution is 5‰;

[0023] The test process is:

[0024] (1) Test the pure water flux of the hollow fiber membrane, the test pressure is 0...

Embodiment 2

[0029] Using the suspension prepared from the inorganic powder in Example 1 with a concentration of 0.5‰, the retention performance of the elastic hollow fiber membrane mentioned in Example 1 was investigated.

[0030] The testing process is as follows:

[0031] The polyurethane-based elastic hollow fiber membrane is cast into a U-shaped module, and the container storage method is used for external pressure filtration. The inner membrane area of ​​the module is about 8.64×10 -2 m 2 ; The test pressure is 0.1MPa, the test time is 120min, and the filtrate is taken every 20min on average to test its turbidity and compare with the turbidity of the original solution. Continuous test for 120min, the average flux is 69.68L / (m 2 h), the turbidity of the stock solution is 32.1ntu, while the average turbidity of the filtrate is 0.154. (Far lower than the drinking water turbidity standard (1ntu) in the "Drinking Water Sanitation Standard" jointly issued by the National Standards Commi...

Embodiment 3

[0033] Utilize the suspension liquid that is made into with the inorganic powder in Example 1, concentration is 2 ‰, investigate the retention performance of the elastic hollow fiber membrane mentioned in the same example 1 and the recovery of the water flux of the hollow fiber membrane after backwashing Rate.

[0034] The testing process is as follows:

[0035] The polyurethane-based elastic hollow fiber membrane is cast into a U-shaped module, and the container storage method is used for external pressure filtration. The inner membrane area of ​​the module is about 8.64×10 -2 m 2 ;

[0036] The test pressure is 0.1MPa, and the test time is 140 minutes. Take the filtrate every 20 minutes to test its turbidity, and compare it with the turbidity of the original solution.

[0037] (1) Using pure water, under internal pressure conditions, the initial transmembrane pressure difference of the membrane is measured to be 0.06MPa.

[0038] (2) External pressure conditions, the tes...

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
particle diameteraaaaaaaaaa
pore sizeaaaaaaaaaa
areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a water processing method and is characterized in that an elastic hollow fiber film with a pressure responsive function is adopted in the invention to process water and a technological process of using at external normal pressure and backwashing at internal high pressure is adopted with the high pressure being 0.1MPa-0.4MPa. Without new design of a membrane module, the water processing method provided by the invention can be used to greatly improve the physical cleaning effect based on the prior art, reduce the frequency of chemical cleaning and effectively reduce the production cost, and has obvious industrial enforcement feasibility.

Description

technical field [0001] The invention relates to water treatment technology, in particular to a water treatment method using elastic functional hollow fiber membranes. Background technique [0002] In recent years, with the development of membrane technology, polyurethane materials with advantages such as high elasticity, high strength, heat resistance, wear resistance, chemical resistance, molecular design, and shape memory have attracted the favor of many membrane experts, but due to Polyurethane material has a dense structure and is difficult to form pores, so it is rarely used in ultrafiltration. The applicant has used polyurethane as the membrane matrix material, and has produced a polyurethane hollow fiber membrane with pressure response function by melt spinning-stretching method and interface pore forming technology (see "A Hollow Fiber Membrane and Its Manufacturing Method") "[200810053896.4] and "A Polyurethane Blended Hollow Fiber Membrane and Its Manufacturing Me...

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): C02F1/44
Inventor 肖长发刘美甜胡晓宇刘海亮
Owner TIANJIN POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap