Method for cleaning hollow fiber gas-liquid membrane contactor

A gas-liquid membrane contactor, hollow technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve undiscovered problems, achieve cost reduction, convenient operation, and prolong service life

Inactive Publication Date: 2008-09-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1) Clean water is heated to 20°C in the liquid storage tank as the cleaning liquid, and then filtered through a 5μm filter at a set flow rate of 4m 3 / hr enters the shell side of the hollow fiber membrane module. Clean water enters the shell side continuously from one end of the shell side of the hollow fiber air-liquid membrane contactor, flows out from the other end of the shell side of the hollow fiber air-liquid membrane contactor and is discharged without recycling.

[0021] 2) Turn on the compression pump to generate 0.2MPa compressed air, and control the flow rate at 2m through the pressure regulating valve 3 / hr, enters the tube side of the hollow fiber membrane module. The pressure gas enters the shell side of the membrane module continuously through the membrane holes of the hollow fiber membrane during the cleaning time of 1 hour. The pressure gas enters the shell side of the membrane module through the membrane hole of the hollow fiber membrane, forms a ga...

Embodiment 2

[0024] 1) The clean water is used as the cleaning liquid and heated to 20°C in the liquid storage tank, and then filtered through a 5μm filter with a set flow rate of 2m 3 / hr enters the shell side of the hollow fiber membrane module. Clean water enters the shell side continuously from one end of the shell side of the hollow fiber air-liquid membrane contactor, flows out from the other end of the shell side of the hollow fiber air-liquid membrane contactor and is discharged without recycling.

[0025] 2) Turn on the compression pump to generate 0.2MPa compressed air, and control the flow rate at 2m through the pressure regulating valve 3 / hr, enters the tube side of the hollow fiber membrane module. The pressure gas enters the shell side of the membrane module continuously through the membrane holes of the hollow fiber membrane during the cleaning time of 1 hour. The pressure gas enters the shell side of the membrane module through the membrane hole of the hollow fiber membr...

Embodiment 3

[0028] 1) Clean water is heated to 20°C in the liquid storage tank as the cleaning liquid, and then filtered through a 5μm filter at a set flow rate of 4m 3 / hr enters the shell side of the hollow fiber membrane module. Clean water enters the shell side alternately and continuously from both ends of the shell side of the hollow fiber air-liquid membrane contactor (switching the direction every 10 minutes), flows out and drains away from the other end of the shell side of the hollow fiber air-liquid membrane contactor without circulation use.

[0029] 2) Turn on the compression pump to generate 0.2MPa compressed air, and control the flow rate at 2m through the pressure regulating valve 3 / hr, enters the tube side of the hollow fiber membrane module. The pressure gas enters the shell side of the membrane module continuously through the membrane holes of the hollow fiber membrane within one hour of cleaning. The pressure gas enters the shell side of the membrane module through t...

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Abstract

The invention discloses a method used for washing a hollow fibre gas-liquid membrane contactor in the technical field of environment protection. Pressure gas enters one side of the hollow fibre and enters the other side thereof through a membrane hole to form a gas-liquid mixed phase onflow with the cleaning solution floating in the other side to impact and wash out the pollutants stuck on a membrane wall, thus leading the pollutants to loosen and shed. The pollutants in the membrane hole can be purged to shed by the pressure gas and be carried away along with the gas-liquid mixed phase onflow. By effectively combining a physical washing method with a chemical method and utilizing the gas-liquid mixed phase onflow formed by the pressure gas and the cleaning solution to wash the hollow fibre membrane, the invention can leave out or reduce the usage of chemical cleaning agents and lower the erosion to the membrane caused by chemical cleaning agents, thus the service life of the membrane is prolonged, the cost of technology is reduced, furthermore, no secondary pollution is caused.

Description

technical field [0001] The invention relates to a method in the technical field of environmental protection, in particular to a cleaning method for a hollow fiber air-liquid membrane contactor. Background technique [0002] Hollow fiber gas-liquid membrane contactor is a device that can effectively realize gas-liquid two-phase mass transfer without gas-liquid two-phase contact. It uses a microporous hollow fiber membrane to separate the gas and liquid two-phase fluid, and the membrane pores provide a place for mass transfer of the two-phase fluid. Compared with traditional contactors, hollow fiber air-liquid membrane contactors have many advantages. For example, the gas and liquid are immiscible with each other, and there will be no phenomena such as liquid flooding and mist entrainment. It can provide a large membrane area, easy to scale up, and the mass transfer efficiency is greatly increased compared with traditional contactors. Due to the many advantages of the gas-li...

Claims

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Application Information

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IPC IPC(8): B01D65/02
Inventor 邵嘉慧刘惠峰赵娟靳强何义亮
Owner SHANGHAI JIAO TONG UNIV
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