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Braided tube-reinforced hollow fiber membrane and preparation apparatus and manufacturing process thereof

A braided tube and reinforced technology, which is applied in the field of braided tube-reinforced hollow fiber membrane and its preparation device and production process, can solve the problems of complex process, low degree of continuity, general bonding strength, etc., and achieve uniform wall thickness distribution , to avoid material leakage and slow down the flow rate

Active Publication Date: 2018-04-17
李亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bonding strength between the surface separation layer and the transition layer is good, since the transition layer is only coated on the outer surface of the braided tube, the bonding strength between the two is average, and the adhesion between the separation layer and the reinforcement has not been fundamentally solved. bad question
Chinese patent CN102512992A discloses a method for preparing a coated membrane hollow fiber tube. Various coating liquids are wrapped on the inner and outer walls of the fiber braided tube through several dipping and rolling processes. However, the process of this method is relatively complicated and the degree of continuity is low. Not suitable for large-scale production
Chinese patent CN203971777U discloses a device for preparing a reinforced composite support hollow fiber membrane. The device is to pass the braided tube through the coating head and the coagulation bath in a horizontal manner. During the coating process, it is difficult to control the coating and the filter layer is evenly coated on the outer surface of the fiber braided tube

Method used

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  • Braided tube-reinforced hollow fiber membrane and preparation apparatus and manufacturing process thereof
  • Braided tube-reinforced hollow fiber membrane and preparation apparatus and manufacturing process thereof
  • Braided tube-reinforced hollow fiber membrane and preparation apparatus and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Example 1: Preparation device for braided tube reinforced hollow fiber membrane

[0070]This example illustrates the structure and construction of the braided tube-reinforced hollow fiber membrane preparation device described in this application.

[0071] The braided tube reinforced hollow fiber membrane preparation device in this embodiment combines figure 1 , mainly composed of line supply mechanism 1, line supply floating roller 2, casting solution spinning tank 3, casting solution filter 4, casting solution metering pump 5, coating head 6, pre-coating head 7, pre-coating head Coating liquid metering pump 8, pre-coating liquid filter 9, pre-coating liquid tank 10, coagulation tank 11, rinsing tank 12, wire take-up mechanism 13, wire take-up floating roller 14, wire winding wheel 15 are composed. Wherein, the wire supply mechanism 1 is connected with the wire supply floating roller 3, and is used to control the constant tension of the fiber braided pipe before and af...

Embodiment 2

[0076] Example 2: Processing Technology of Braided Tube Reinforced Hollow Fiber Membrane

[0077] This example illustrates the method for preparing a braided tube-reinforced hollow fiber membrane using the device for preparing a braided tube-reinforced hollow fiber membrane in Example 1.

[0078] Step 1, prepare the fiber braided tube:

[0079] The fiber braided tube is braided by chemical fiber multifilament, which has excellent chemical stability and mechanical strength. The material is one or a mixture of polyester fiber, polypropylene fiber, polyamide fiber and polyurethane fiber. Factors such as braiding density and number of braiding spindles affect the size and performance of fiber braided tubes. In this embodiment, the weaving density is 20-50 meshes, and the fiber braided tube with high weaving density has little deformation, but the output is low, and it is difficult for the pre-coating liquid to penetrate into the inside and the inner surface of the fiber braided ...

Embodiment 3

[0105] Example 3: Processing Technology of Braided Tube Reinforced Hollow Fiber Membrane

[0106] The setting and working principle of this embodiment are the same as that of Embodiment 2, the difference is:

[0107] combine image 3 , the braided tube 302 is prepared from chemical fiber filament polyester fiber, the density of the braided tube 302 is 35 mesh, the number of braided spindles is 20, and the obtained fiber braided tube has an outer diameter of 1.8 mm and an inner diameter of 1.0 mm.

[0108]The PVDF resin of the pre-coating solution is Kynar 761 with a content of 10%; the hydrophilic agent is glycerol with a content of 10%; the content of diatomaceous earth is 3%; the solvent is dimethylacetamide with a content of 77%. The above raw materials are put into the dissolution tank in the order of first liquid and then solid, first small molecular weight and then large molecular weight, and stir at 70-75°C to make a uniform pre-coating liquid, and then transfer to the...

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Abstract

The application relates to a braided tube-reinforced hollow fiber membrane and a preparation apparatus and a manufacturing process thereof, which belong to the technical field of semipermeable membranes characterized by organic materials and used for physical or chemical separation and special preparation methods thereof. The braided tube-reinforced hollow fiber membrane is composed of three layers, i.e. a separating layer, a precoated layer and a braided tube reinforcing layer, the braided tube reinforcing layer is arranged inside, the separating layer is arranged outside, moreover, the precoated layer consists of a first precoated layer and a second precoated layer, the first precoated layer is arranged on the inside of the braided tube reinforcing layer, and the second precoated layer is arranged between the braided tube reinforcing layer and the separating layer. When the application is applied in fields such as braided tube-reinforced hollow fiber membranes, the braided tube-reinforced hollow fiber membrane and preparation apparatus and manufacturing process thereof have the advantages of high bonding strength, low stripping rate and the like.

Description

technical field [0001] The application relates to a braided tube-reinforced hollow fiber membrane and its preparation device and production process, belonging to the technical field of semipermeable membranes for physical or chemical separation characterized by organic materials and their special preparation methods. Background technique [0002] Membrane bioreactor (MBR) water treatment technology is a high-efficiency biochemical water treatment technology that combines membrane technology and biological technology. It is a new high-efficiency sewage treatment technology that combines membrane separation technology and traditional sludge method. It has the characteristics of wide application range, low comprehensive operation cost, good effluent water quality, stable system performance, and small footprint. It has a wide range of applications in industrial sewage treatment and urban domestic sewage treatment. Usually, the MBR system adopts submerged suction filtration durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/34C02F3/10
CPCB01D67/0079B01D69/08B01D69/087B01D71/34C02F3/102C02F3/105Y02W10/10
Inventor 李亮
Owner 李亮
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