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A repair device for hollow fiber gas separation membrane

A gas separation membrane and fiber technology, which is applied in the field of membrane repair and can solve problems such as difficulty in curing immediately

Active Publication Date: 2021-05-14
上海穗杉实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the molecular weight of Si rubber is too large and the concentration is too high, it is difficult to enter the defect hole, but wraps on its surface; while the Si rubber molecular weight is too small and the concentration is low, although it can enter the defect hole, it is difficult to solidify immediately, and flow out of defect holes

Method used

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  • A repair device for hollow fiber gas separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Select sylgard 184, in which the curing agent and the basic components are mixed according to the mass ratio of 1:20 and then dissolved in n-heptane, and the first repair liquid with a mass fraction of 1% is prepared, stirred evenly at room temperature, and then added to the first liquid tank 4 middle. Select silicone rubber with a molecular weight of 50,000 to dissolve in n-heptane, add hydrogen-containing silicone oil and a platinum catalyst, prepare a second repair solution with a mass fraction of 1%, stir it evenly at room temperature, and add it to the second liquid tank 7 . Utilize the equipment that the present invention provides, the hollow fiber membrane (outer diameter 0.28mm that obtains to polyimide spinning, under 0.7Mpa membrane silk air permeability 0.05m 3 h -1 m -2 · bar -1 , Oxygen / Nitrogen Separation Coefficient 4.0) After restoration, its air permeability is 0.02m 3 h -1 m -2 · bar -1 , The oxygen / nitrogen separation coefficient is 6.5.

Embodiment 2

[0043] Select sylgard 184, in which the curing agent and the basic components are mixed according to the mass ratio of 1:20 and then dissolved in cyclohexane, and the first repair liquid with a mass fraction of 0.1% is prepared, stirred evenly at room temperature, and then added to the first liquid tank 4 middle. Select silicone rubber with a molecular weight of 100,000 to dissolve in cyclohexane, add hydrogen-containing silicone oil and a platinum catalyst, prepare a second repair solution with a mass fraction of 1%, stir it evenly at room temperature, and add it to the second liquid tank 7 . Utilize the equipment that the present invention provides, to the hollow fiber membrane that polysulfone spinning obtains (outer diameter 0.3mm, the air permeable capacity of membrane silk 0.1m under 0.7Mpa 3 h -1 m -2 · bar -1 , Oxygen / Nitrogen Separation Coefficient 2.0) After restoration, its air permeability is 0.05m 3 h -1 m -2 · bar -1 , Oxygen / nitrogen separation coefficien...

Embodiment 3

[0045] Select sylgard 184, in which the curing agent and basic components are mixed according to the mass ratio of 1:20 and then dissolved in cyclohexane, and the first repair liquid with a mass fraction of 3% is prepared, stirred evenly at room temperature, and then added to the first liquid tank 4 middle. Select polytrimethyl-1-propyne to be dissolved in cyclohexane, add hydrogen-containing silicone oil and platinum catalyst, configure a second repair solution with a mass fraction of 10%, stir it evenly at room temperature, and add it to the second liquid tank 7 . Utilize the equipment that the present invention provides, to the hollow fiber membrane that polyether spinning obtains (outer diameter 0.27mm, under 0.7Mpa, membrane silk air permeability 1m 3 h -1 m -2 · bar -1 , Oxygen / Nitrogen Separation Coefficient 1.05) After restoration, its air permeability is 0.1m 3 h -1 m -2 · bar -1 , Oxygen / nitrogen separation coefficient 3.0.

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Abstract

The invention provides a repair device for a hollow fiber gas separation membrane. The device includes a wire-releasing roller, a first liquid material tank, a second liquid material tank, a curing device, and a wire-receiving roller arranged in sequence. The first liquid material The tank is filled with the first restoration fluid, and the second liquid material tank is filled with the second restoration fluid. The device can continuously repair defective hollow fiber membranes, and the repaired hollow fiber membranes can be directly cast into membrane modules, which greatly shortens working time, improves production efficiency, and significantly improves the repair effect.

Description

technical field [0001] The invention belongs to the field of membrane repair and relates to a repair device for a hollow fiber gas separation membrane. Background technique [0002] In recent years, the research and application of membrane technology has developed rapidly. According to the shape of the membrane, it can be divided into three types: flat membrane, tubular membrane and hollow fiber membrane. The preparation process of hollow fiber membrane is simple, the structure is easy to control, and the filling density is high, so it is widely used in the field of liquid and gas separation. [0003] The hollow fiber gas separation membranes known in the market are mainly organic polymer membranes, and the materials include polysulfone, polyimide, poly-4-methylisoamylene and the like. Hollow fiber gas separation membranes are mainly formed by solvent-induced phase separation or thermally induced phase separation. However, in the production process, certain defect holes wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/10B01D53/22
CPCB01D53/228B01D65/108
Inventor 吕必达王晨胡婷婷陈凌秀李明
Owner 上海穗杉实业股份有限公司