Method of improving gas separation film penetration instrument

A technology of gas separation membranes and permeameters, which is applied in the field of chemical engineering and can solve problems affecting the accuracy of membrane permeability measurement

Inactive Publication Date: 2006-09-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This improved method solves two problems that affect the accuracy of the membrane permeability measurement by the constant pressure variable volume method, can accurately measure the gas permeability parameters of the membrane, and saves the transition time of the two gases before and after the measurement

Method used

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  • Method of improving gas separation film penetration instrument
  • Method of improving gas separation film penetration instrument
  • Method of improving gas separation film penetration instrument

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0019] exist figure 2 In the process, stick the upper and lower sides of the flat membrane 20 on the ring-shaped thin aluminum tape 19 respectively, place a layer of filter paper on the porous backing plate 22 and fix it in the middle depression of the lower cover 18 of the membrane pool with glue, and put the O-shaped sealing gasket 23. Fix the upper cover 17 of the membrane pool and the lower cover 18 of the membrane pool with hexagonal screws.

[0020] exist figure 1 in, will figure 2 The membrane pool in is connected to the gas path 11 position with the temperature control box, and the temperature of the temperature control box 16 is set. Close the intake valve 1, three-way valve 7 and 15, open the valve 8, and turn the valve 15 to vacuumize. In order to prevent the film from being broken (inorganic film, such as carbon film, etc.) and deformation (polymer film, etc.), the downstream system is first excluded. air. After the downstream vacuum degree increases, close v...

specific Embodiment approach 2

[0023] exist image 3 In the process, the two ends of the tubular membrane 28 are sealed with glue, and one end is fixed on the support 25 with glue, and O-shaped sealing gaskets 27 are respectively placed on the left and right sides of the support, and the lower cover 26 of the membrane tank is screwed into the upper cover 24 of the membrane tank and fixed.

[0024] exist figure 1 in, will image 3 The membrane pool in is connected to the position of the gas path 11 with the thermostat box, after controlling the temperature of the thermostat box 16. Close the intake valve 1, three-way valves 7 and 15, open the valve 8, and turn the valve 15 to vacuumize. In order to prevent the membrane from breaking and deforming, first remove the air in the downstream system. After the downstream pressure is about to come down, close valves 2 and 13, open valve 5 and turn valve 7 to vacuumize, vacuumize the upstream and downstream of the entire gas circuit, and use the vacuum gauge 4 to ...

Embodiment 1

[0028] The thickness is 20mm with epoxy glue, and the effective penetration area is 4.15cm 2 The circular polyimide film is fixed in the membrane cell, adopts specific embodiment 1, has obtained this organic film to hydrogen (H 2 ): 2.2 Barrer (1 Barrer = 10 -10 cm 3 (STP) cm cm -2 √ -1 mHg -1 ), carbon dioxide (CO 2 ): 1.1Barrer, oxygen (O 2 ): 0.18Barrer, nitrogen (N 2 ): 0.034Barrer; selectivity: H 2 / N 2 = 64.7, CO 2 / N 2 =32.4,O 2 / N 2 = 5.3.

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Abstract

A method for improving the osmosis apparatus with gas separating membrane features that when a constant-pressure volume-varying method is used to measure the gas osmosis of membrane, a vacuumizing method is used at up-stream of membrane pool for exhausting the gas from pipeline and membrane and a capillary soap membrane flowmeter isolated from air is used at the down-stream for measuring the osmotic speed of gas, so effectively preventing the reverse diffusion of gas.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and relates to an improved new gas separation membrane permeator. Background technique [0002] Membrane separation technology has the advantages of high efficiency, environmental protection, and energy saving. It has made rapid progress in recent decades and has been widely used in many fields such as food, biology, chemical industry, energy, and environmental protection. Gas separation membrane is an important part of membrane science and technology, and is considered to be the most promising third-generation gas separation technology. The accurate determination of the permeability parameters (such as permeation flux, selectivity, etc.) of the gas separation membrane is very important for the improvement and perfection of the membrane production process and the research, development and application of new membrane products. [0003] At present, the methods for testing the permeabil...

Claims

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Application Information

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IPC IPC(8): B01D53/22
Inventor 王同华张兵邱介山
Owner DALIAN UNIV OF TECH
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