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A device and method for membrane gas separation

A technology of gas separation and membrane method, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, etc., can solve the problems of improving the gas separation and permeation rate of membrane method, and achieve the improvement of permeation rate and separation effect, low equipment cost, The effect of increasing speed

Active Publication Date: 2011-12-14
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

[0005] Retrieving researches at home and abroad, there is no report on improving the permeation rate of membrane gas separation by adding electrostatic force as the driving force for mass transfer

Method used

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  • A device and method for membrane gas separation
  • A device and method for membrane gas separation

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Embodiment 1

[0026] Such as figure 1 As shown, an exemplary asymmetric electrostatic field coupled membrane gas separation device 10 includes a raw material chamber 7 , a permeation chamber 8 , and a flat membrane 9 . In one embodiment, the raw material chamber 7 includes an inlet 1 and an outlet 2 for the raw gas, and the chamber is at normal pressure with a temperature of 25°C. In the raw material chamber 7, there is a plate electrode 4, which is a cathode; in the permeation chamber 8, a needle electrode 5 is arranged, which is an anode. A DC voltage is applied between the plate electrode 4 and the needle electrode 5 to generate an asymmetrical electrostatic field, and the voltage of the asymmetrical electrostatic field is 2000 volts. The inside of the permeation chamber 8 is negative pressure, the pressure is 1.7kPa.

[0027] The raw material gas contains saturated water vapor 6-2 and methane 6-1, and the gas flow rate is 0.6L / min. It enters the raw material chamber 7 from the inlet 1...

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Abstract

The invention relates to an asymmetric electrostatic field coupling membrane gas separation device which comprises a raw material chamber, a permeating chamber, a membrane and an electrode, wherein the electrode can be used for generating an asymmetric electrostatic field; the electrode comprises a flat electrode and a needle electrode; a 101-104V direct current voltage is applied to the electrode; the raw gas containing polar gas molecules enters into the raw material chamber; under the dual action of chemical potential gradient and electric potential gradient of the asymmetric electrostatic field, the raw gas spreads and permeates through the membrane at a speed higher than the speed under the existence of pure chemical potential gradient, thereby forming the penetrating gas and flowing from the permeating chamber; and the remaining gas flows from the raw material chamber, thereby separating the raw gas. The invention also relates to an asymmetric electrostatic field coupling membrane gas separation method.

Description

technical field [0001] The invention relates to the field of membrane gas separation, in particular to an asymmetric electrostatic field coupled membrane gas separation device and method, which increases mass transfer driving force, improves permeation rate and separation effect. Background technique [0002] Gas membrane separation technology has been commercially applied since the 1970s. The main features of this technology are no phase change, low energy consumption, flexible device scale according to the requirements of processing capacity, simple equipment, convenient operation and high operational reliability. In the process of membrane gas separation, the gas dissolves in the membrane when it comes into contact with the membrane, and is driven by the chemical potential gradient to diffuse in the membrane to the other side, and the gas is desorbed from the membrane when it reaches the other side of the membrane. , realizing the mass transfer of gas from one side of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22
Inventor 杜润红
Owner TIANJIN POLYTECHNIC UNIV
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