Method of improving gas separation film penetration instrument

A technology of gas permeability and gas separation membrane, which is applied in the field of chemical engineering and can solve problems such as impact

Inactive Publication Date: 2008-07-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves two problems that affect the accuracy of the constant pressure variable volume method for measuring the permeability of the membrane, 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, the upper and lower sides of the flat polymer membrane or inorganic membrane 20 are respectively glued on the ring-shaped aluminum foil tape 19, a layer of filter paper is placed on the porous backing plate 22 and fixed in the middle depression of the lower cover 18 of the membrane pool with glue, and placed Replace the O-shaped gasket 23, and 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 in the gas path with temperature control box, and the temperature of temperature control box 16 is set. Close valve 1, three-way valve 7 and 15 of the gas to be measured, open valve 8, and turn valve 15 to vacuumize. In order to prevent membrane breakage (inorganic membrane, such as carbon membrane, etc.) and deformation (polymer membrane, etc.), the downstream system should be excluded first. the air inside. A...

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 in the gas circuit with thermostat, after controlling the temperature of thermostat 16. Close the test gas valve 1, three-way valve 7 and 15, open the valve 8, and turn the valve 15 to vacuumize. In order to prevent the membrane from being broken and deformed, the air in the downstream system is firstly removed. After the downstream pressure drops, close the valves 2 and 13, open the valve 5 and turn the valve 7 to vacuumize, vacuumize the upstream and downstream of the entire gas circuit, and use the vacuum gauge 4 to judge that the vacuum has ...

Embodiment 1

[0028] The thickness is 20μm 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 ·s -1 ·cmHg -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 a method for measuring gas permeability parameters with a gas separation membrane permeameter. 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 pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/22
Inventor 王同华张兵邱介山
Owner DALIAN UNIV OF TECH
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