Reinforced hollow fiber membrane, preparation method and device

A preparation device and fiber membrane technology, applied in the field of organic hollow fiber membrane preparation, can solve problems such as industrialization difficulties, polytetrafluoroethylene flat membrane preparation and complicated winding process, etc., to improve the application field, increase the effective membrane area, The effect of reducing the footprint

Pending Publication Date: 2019-10-15
南京久盈膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, there are some patents that use other special materials to prepare hollow fiber membranes, such as PTFE material (CN102284251A), but the preparation and winding process of PTFE flat membranes is relatively complicated, and industrialization is difficult

Method used

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  • Reinforced hollow fiber membrane, preparation method and device
  • Reinforced hollow fiber membrane, preparation method and device
  • Reinforced hollow fiber membrane, preparation method and device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0069] The preparation method of the present invention allows the polymer in the core cavity of the hollow fiber membrane to infiltrate into the membrane sublayer during the one-time molding process of the hollow fiber membrane, so that a mixture of PVDF and polymer is formed under the membrane sublayer. The bottom layer, the toughening polymer here, is obtained by the cross-linking reaction of polymerizable reactants and cross-linking agents. This polymer penetrates into the PVDF on the inner surface of the PVDF hollow fiber membrane to form a single The bottom layer is a bottom layer mixed with PVDF and polymer, which can improve the longitudinal tensile strength of the PVDF hollow fiber membrane. From the perspective of the cross-section, the bottom layer of the surface skin layer, membrane sublayer, PVDF and polymer is formed from the outside to the inside, because the surface skin layer and the membrane sublayer play a role of separation, and it is in the phase separation ...

Embodiment 1

[0085] 1) Preparation of casting solution: Weigh 15% PVDF, 18% PVP-K90, 2% PEG-200, 75% DMAC, and stir in a stirring tank for 4-6 hours in a water bath at 80°C , dissolved evenly, vacuum defoaming to obtain polyvinylidene fluoride casting solution.

[0086] 2) Squeeze the casting liquid and core liquid into the spinneret through the metering pump, and at the same time, the braided rope also enters the spinneret. Driven by the winding roller of the solidification tank, the primary film filament and the braided rope enter the coagulation bath together, and wait for the primary When the membrane filament is solidified in the coagulation bath, it becomes a bundle with the braided rope under the action of the ceramic ring.

[0087] 3) Under the action of three rollers, the film bundle passes through the winding device. The winding device mainly consists of a ring. There is a rubber ring on the outside of the ring, and the ring is vertically fixed on a flat plate, which contains 4...

Embodiment 2

[0092] 1) Preparation of casting solution: weigh 20% PVDF, 18% PVP-K30, 2% PEG-200, 75% DMAC, and stir in a stirring tank for 4-6 hours in a water bath at 80°C , dissolved evenly, vacuum defoaming to obtain polyvinylidene fluoride casting solution.

[0093] 2) Squeeze the casting liquid and core liquid into the spinneret through the metering pump, and at the same time, the braided rope also enters the spinneret. Driven by the winding roller of the solidification tank, the primary film filament and the braided rope enter the coagulation bath together, and wait for the primary When the membrane filament is solidified in the coagulation bath, it becomes a bundle with the braided rope under the action of the ceramic ring.

[0094] 3) Under the action of the three rollers, the film bundle passes through the winding device to bundle the film filaments into a bundle.

[0095] 4) After the rinsing bath, the wire is collected by the wire-receiving wheel, and then cut into bundles of w...

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Abstract

The invention provides a novel reinforced hollow fiber membrane preparation device. The reinforced hollow fiber membrane comprises a braided rope supported at the center, membrane filaments distributed around the support rope and a winding tape binding the braided rope and the membrane filaments into a membrane bundle. The device comprises a feed liquid tank, a core liquid tank, a spinning metering pump, a pay-off rack, a special spinning head, a coagulation bath, a winding tape apparatus, a three-roller traction apparatus, a rinsing tank and a filament roll-up wheel. The beneficial effect ofinvention lies in that the invention provides the device for preparation of the reinforced hollow fiber membrane. The braided rope provides the tensile strength of the whole membrane filaments, and the membrane filaments provide the separation performance of the whole membrane bundle. Compared with the membrane filament of traditional outer diameter, the overall membrane bundle obtained by the device can have a larger separation specific surface area. At the same time, the device can prepare the one-time formed membrane bundle, and has the advantages of simple operation and high production efficiency.

Description

technical field [0001] The invention relates to the field of preparation of organic hollow fiber membranes, in particular to a reinforced hollow fiber membrane, a preparation method and a device. Background technique [0002] Water resources are a precious resource for our country, and each industry has different requirements for the water resources used. Introducing membrane separation technology into the field of water resource utilization can better carry out water resource pretreatment, reclaimed water reuse, and discharge of waste water up to standard, which can meet the water demand of various industries and is also in line with the national sustainable development strategy. [0003] Membrane application mainly plays a role of solid-liquid separation in membrane bioreactors, ultrapure water preparation, etc., and its application in membrane aerated bioreactors, aquaculture, etc. mainly plays a role in gas-liquid contact, increasing the solution in liquid media. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D67/00
CPCB01D67/0002B01D67/0011B01D69/08B01D69/085
Inventor 周杰程杨明崔朝亮汪朝晖汪效祖
Owner 南京久盈膜科技有限公司
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