A Cleaning Method for Polysulfone Gas Filtration Membrane Contaminated by Dust and Oil

A technology of oil pollution and filter membrane, which is applied in the field of membrane cleaning, can solve the problems of oily substance pollution, air permeability reduction, pollution, etc., achieve good cleaning effect, improve cleaning effect, and remove dust particles and oily stains

Inactive Publication Date: 2015-08-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Polysulfone (PSU) gas filtration membranes are widely used. In engineering applications, polysulfone (PSU) gas filtration membranes will be polluted by dust and oily substances in machinery, resulting in a decrease in air permeability. This problem is increasingly Therefore, it is particularly important to develop an efficient cleaning method for the polluted membrane

Method used

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  • A Cleaning Method for Polysulfone Gas Filtration Membrane Contaminated by Dust and Oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Soak in deionized water at a constant temperature, and soak the polluted membrane in deionized water at a constant temperature of 4°C for 15 hours.

[0021] Preparation cleaning solution, cleaning solution composition weight percent is: sodium hypochlorite 0.3%, citric acid solution 4%, all the other are pure water;

[0022] Ultrasonic cleaning, put the polluted membrane into the ultrasonic cleaning tank, add deionized water, and make the dirt fall off the surface of the membrane through ultrasonic vibration. The ultrasonic cleaning time is 10min, and the ultrasonic frequency is 19KHz~21KHz;

[0023] For chemical cleaning, put the ultrasonically cleaned membrane in the prepared sodium hypochlorite solution, soak for 1 hour at a temperature of 18°C, rinse the membrane soaked in alkali solution, and put it in the prepared citric acid solution for 1 hour. The temperature was 18°C.

Embodiment 2

[0025] Soak in deionized water at a constant temperature, and soak the polluted membrane in deionized water at a constant temperature of 4°C for 15 hours.

[0026] Configure the cleaning solution, the cleaning solution composition weight percentage is: sodium hypochlorite 0.4%, citric acid solution 10%, all the other are pure water;

[0027] Ultrasonic cleaning, put the polluted membrane into the ultrasonic cleaning tank, add deionized water, and make the dirt fall off the surface of the membrane through ultrasonic vibration. The ultrasonic cleaning time is 10min, and the ultrasonic frequency is 19KHz~21KHz;

[0028] For chemical cleaning, first put the ultrasonically cleaned membrane in the prepared sodium hypochlorite solution, soak for 1 hour at a temperature of 25°C, rinse the membrane soaked in alkali solution, and put it in the prepared citric acid solution for 1 hour. The temperature is 25°C.

Embodiment 3

[0030] Soak in deionized water at a constant temperature, and soak the polluted membrane in deionized water at a constant temperature of 4°C for 15 hours.

[0031] Configure the cleaning solution, the cleaning solution composition weight percentage is: sodium hypochlorite 0.5%, citric acid solution 10%, all the other are pure water;

[0032] Ultrasonic cleaning, put the polluted membrane into the ultrasonic cleaning tank, add deionized water, and make the dirt fall off the surface of the membrane through ultrasonic vibration. The ultrasonic cleaning time is 10min, and the ultrasonic frequency is 19KHz~21KHz;

[0033] For chemical cleaning, put the ultrasonically cleaned membrane in the prepared sodium hypochlorite solution, soak for 1 hour at a temperature of 18°C, rinse the membrane soaked in alkali solution, and put it in the prepared citric acid solution for 1 hour. The temperature was 18°C.

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Abstract

The invention relates to a washing method for a polysulfone gas filter membrane contaminated by dust and oil and belongs to the field of membrane washing. The method comprises the following steps: ultrasonically washing the contaminated membrane in an oscillating manner, and then carrying out the chemical washing by firstly utilizing sodium hypochlorite and then utilizing citric acid. By adopting the washing method, the breathability of the contaminated membrane can be well restored after the membrane is washed. The washing method also has the advantages of low washing cost, no pollution and the like.

Description

technical field [0001] The invention relates to a cleaning method for the polysulfone (PSU) gas filter membrane polluted by dust and oil. The method can effectively clean the polysulfone (PSU) gas filter membrane polluted by dust and oil. The advantages of high recovery rate, low cleaning cost and no pollution belong to the field of membrane cleaning. technical background [0002] The new polysulfone (PSU) filter membrane is made of PET three-dimensional mesh polyester fiber 1.5D50%, 1.2D50%, after being stiffened by PSU (polysulfone) polymer foam plastic, it is hot-pressed and shaped, with smooth surface and high steel strength. Wear-resistant, acid and alkali resistant, long service life, good hydrophobicity, the surface of the filter material has uniform pores of 5-8 microns, which can block dust on the surface of the filter material, suitable for special areas such as coastal areas with high humidity, desert areas, and mining areas Air filtration for special vehicles un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/02
Inventor 王湛张西明周跃男张倩杨文涛程立娜
Owner BEIJING UNIV OF TECH
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