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Water electrolysis diaphragm and manufacturing method thereof

A manufacturing method and technology of water electrolysis, which are applied to diaphragms, electrolysis processes, electrolysis components, etc., can solve the problems of complex process operations, low electrolysis efficiency, and reduced strength of non-woven fabrics, and achieve high ion permeability and simple production process. , excellent hydrophilic effect

Inactive Publication Date: 2019-04-02
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the relatively strong liquid absorption rate of nonwoven fabrics in this patent, after strong acid treatment, a large amount of precious water resources and chemicals need to be consumed in the cleaning process, and the cleaning time is also long, and the process operation is complicated, which is easy to pollute the environment.
In addition, since the strength of the non-woven fabric itself is not high, and the treatment time in the concentrated sulfuric acid solution is longer, the strength of the non-woven fabric will be greatly reduced, thereby affecting the use of the diaphragm.
[0005] Another example is the Chinese published patent CN101195944 which discloses a woven fabric made of one, two or three of polyetheretherketone fiber, polyphenylene sulfide fiber and polypropylene fiber as a non-asbestos environment-friendly and energy-saving fabric. Diaphragm cloth, although the air tightness of the diaphragm cloth meets the standard requirements for asbestos diaphragms, but because the chemical fibers used above are hydrophobic materials, the hydrophilicity of the diaphragm cloth is poor, which eventually leads to poor gas barrier properties and low electrolysis efficiency, which cannot achieve energy saving , efficient effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Water electrolysis diaphragm and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0094] The 100% polyphenylene sulfide fiber with a circular cross-section is spun through the cotton spinning process of cleaning-carding-drawing-roving-spinning-winding-doubling-twisting-heat setting to obtain single yarn The twist coefficient is 146, and the twist coefficient of the ply is 172. The obtained yarn is woven by a loom as a warp yarn and a weft yarn, and the obtained warp density is 35.0 strands / inch, and the weft density is 24.3 strands / inch. Covering The plain weave fabric with a coefficient of 2528 is then scoured, dried, and hydrophilically processed under the following conditions. The reaction gas is oxygen, the gas flow rate of oxygen is 1800mL / min, the discharge power is 4500W, the vacuum degree is 50Pa, and the processing speed is 2m / min, a woven fabric diaphragm with a thickness of 0.83mm, a maximum pore size of 29.6μm, and an average pore size of 4.1μm was prepared, of which 88.4% had a pore size below 10μm, and 11.6% had a pore size between 11μm and the...

Embodiment 2

[0096]The 100% polyphenylene sulfide fiber with a circular cross section is spun through the cotton spinning process of cleaning-carding-drawing-roving-spinning-winding-doubling-twisting-heat setting, in which the twist of the single yarn The coefficient is 61, and the twist coefficient of ply is 152, and the obtained yarn is woven by loom as warp and weft yarn, and the warp density is 35.0 threads / inch, and the weft density is 24.1 threads / inch. The cover factor is 2528 plain weave fabric, then scouring, drying, and hydrophilic processing under the following conditions, the reaction gas is oxygen, the gas flow rate of oxygen is 1800mL / min, the discharge power is 4500W, the vacuum degree is 50Pa, and the processing speed is 2m / min. min, a woven fabric separator with a thickness of 0.84 mm, a maximum pore size of 20.9 μm, and an average pore size of 3.5 μm was prepared, of which 91.5% had a pore size below 10 μm, and 8.5% had a pore size between 11 μm and the maximum pore size. ...

Embodiment 3

[0098] The 100% polyphenylene sulfide fiber with a circular cross section is spun through the cotton spinning process of cleaning-carding-drawing-roving-spinning-winding-doubling-twisting-heat setting, in which the twist of the single yarn Coefficient is 329, the twist coefficient of ply is 448, and the yarn that makes is woven by loom as warp yarn and weft yarn, and making warp direction density is 35.4 root / inch, and weft density is that 24.0 root / inch cover factor is 2528 plain weave fabric, then scouring, drying, and hydrophilic processing under the following conditions, the reaction gas is oxygen, the gas flow rate of oxygen is 1800mL / min, the discharge power is 4500W, the vacuum degree is 50Pa, and the processing speed is 2m / min. min, a woven fabric separator with a thickness of 0.80 mm, a maximum pore size of 32.7 μm, and an average pore size of 4.7 μm was prepared, of which 80.7% had a pore size below 10 μm, and 19.3% had a pore size between 11 μm and the maximum pore s...

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Abstract

The invention discloses a water electrolysis diaphragm and a manufacturing method thereof, and the diaphragm is a woven fabric diaphragm, the woven fabric diaphragm is fromed by high-temperature-resistant acid and alkali resistant fiber which is frequently used at temperature of 150 DEG c or higher; the maximum pore diameter of the woven fabric diaphragm is 15-55 microns, pores wuth the pore diameter less than 10 [mu] m accounts for 80.0-95.0%, and pores wuth the pore diameter between 11 microns and the maximum pore diameter accounts for 5.0-20.0 %. The water electrolysis diaphragm provided bythe invention has high ion permeability and excellent hydrophilicity, and has the characteristics of simple production process and no pollution to the environment.

Description

technical field [0001] The invention relates to a water electrolysis diaphragm and a manufacturing method thereof. Background technique [0002] Diaphragm cloth is the main core material of water electrolysis cell. Water electrolysis hydrogen production and oxygen production equipment are widely used in military, petrochemical, steel and other manufacturing fields. At present, major domestic manufacturers of alkaline water electrolysis hydrogen production equipment still use asbestos cloth as a diaphragm . However, with the advancement of industrialization and technological progress, people have gradually realized that there are some problems with asbestos diaphragms in the process of production practice. Asbestos itself is not poisonous. Its biggest hazard comes from its fibers, which are very small and almost invisible to the naked eye. When these fine fibers are released, they will float in the air for a long time and be easily inhaled by the human body. . Therefore, i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B13/02C25B1/10D03D1/00D03D13/00D03D15/00
CPCC25B13/02D03D1/00D03D13/008D03D15/00C25B1/04C25B9/73Y02E60/36
Inventor 石彦芳孙兵曹志丹
Owner TORAY FIBER RES INST(CHINA) CO LTD
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