Lining-reinforced hollow fiber membrane tube as well as preparation device and preparation method thereof

A preparation device and enhanced technology, which is applied in the field of preparation of polymer hollow fiber microporous membranes, can solve problems such as membrane layer peeling, and achieve the effects of improving adhesion, strengthening strength and flexibility

Active Publication Date: 2011-08-24
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

However, the film peeling problem still exists

Method used

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  • Lining-reinforced hollow fiber membrane tube as well as preparation device and preparation method thereof
  • Lining-reinforced hollow fiber membrane tube as well as preparation device and preparation method thereof
  • Lining-reinforced hollow fiber membrane tube as well as preparation device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] This example illustrates the structure and construction of the lining-reinforced hollow fiber membrane preparation device of the present invention.

[0080] The lining reinforced hollow fiber membrane preparation device of the present invention mainly consists of a casting liquid tank 1, a defoaming tank 2, a blending stock solution storage tank 3, a spinning box 4, a transition layer pre-coating tank 7, and a coating machine The head 8, the film-forming tunnel 9, the coagulation bath 10, the rinsing tank 11, the godet roll 12 and the winding wheel 13; wherein, the inside of the spinning box 4 is respectively provided with a blend liquid pump 5 and a casting liquid pump 6 ; The coating head 8 is set in the film-forming tunnel 9;

[0081] On the one hand, the liquid outlet of the blending stock solution storage tank 3 is connected to the inlet of the blend liquid pump 5 through a valve, and the outlet of the blend liquid pump 5 is connected to the upper side of the feed ...

Embodiment 2

[0088] This example illustrates the method for preparing a liner-reinforced hollow fiber membrane tube using the liner-reinforced hollow fiber membrane tube preparation device described in Example 1.

[0089] Step 1, prepare the lined braided tube:

[0090] The lining braided tube is braided by chemical fiber multifilament, which has excellent chemical stability and mechanical strength. The material is one or a mixture of polyamide fibers, polyester fibers, and polyurethane fibers. Factors such as braiding density, chemical fiber filament denier, and braiding spindle number affect the size and performance of the liner. The weaving density of the present invention is 20-60 meshes, and the liner pipe with high weaving density becomes smaller in shape, but the output is low; while the problem at low density is that the elongation is high and easy to deform, which in turn affects the overall performance of the membrane pipe. Preferably, the weaving density is 25-40 mesh. The nu...

Embodiment 3

[0122] In this embodiment, hollow fiber membrane tubes are prepared according to the method of Example 2, wherein the selected conditions and the properties of the prepared membrane tubes are as follows:

[0123] The braided tube is prepared from chemical fiber filament polyester fiber, the density of the braided tube is 45 mesh, the number of braided spindles is 24, the outer diameter of the obtained braided tube is 1.65 mm, and the inner diameter is 0.85 mm. Solef 1010 and HSV 900 two kinds of polyvinylidene fluoride resins with different weight-average molecular weights were used to blend and prepare the casting solution. The solvent was dimethylacetamide (DMAC) with a content of 56%. Polyvinylpyrrolidone (PVP) K17, PEG400 and glycerin were selected as the polymer water-soluble pore-forming agent, hydrophilic thickener and non-solvent respectively, and the contents of each component are listed in Table 1. The above raw materials are put into the reaction kettle in the order...

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Abstract

The invention relates to a lining-reinforced hollow fiber membrane tube as well as a preparation device and preparation method thereof, belonging to the field of preparation of polymer hollow fiber microporous membranes. In the membrane tube, a film forming chimney is designed reasonably, a coating layer on a braided tube led from a coating machine is subjected to controllable steam diffusion-induced phase inversion firstly, and then enters a coagulating bath, so that an open-pore surface skin layer with high porosity is formed on a film separation layer, and the radial direction of the membrane layer is in an integral asymmetric and interpenetrating cell-shaped structure; a composite material is selected to prepare a transition layer, so that the transition layer has excellent adhesive force and hardness, excellent compatibility with a surface separation layer and tiny cubical contraction in a phase conversion process at the same time; optimized braided tube size and braiding densityare selected to ensure that the braided tube has lower flexibility; and a method capable of maintaining reasonable roundness and the like in the production process ensures that the lining polyvinylidene fluoride (PVDF) hollow ultrafiltration membrane tube has the advantages of integral asymmetric structure with high integrity, high-porosity surface separation layer, higher back pressure enduring capability and the like.

Description

technical field [0001] The invention belongs to the field of polymer hollow fiber microporous membrane preparation, and relates to a liner-reinforced hollow fiber membrane tube, a preparation device and a preparation method thereof. Background technique [0002] With the continuous improvement of the degree of industrialization and the deteriorating quality of various water sources, good chemical stability, high mechanical strength, and strong anti-pollution ability have become more and more common requirements for the performance of membrane separation materials. At the same time, due to the water quality-type water shortage caused by the deep pollution of a large number of water bodies, the MBR process has become the most promising wastewater treatment technology in the market. Since the first MBR demonstration project was completed in 1990, the special membrane elements for MBR process have expanded from flat to hollow or multi-channel. At present, the hollow membrane el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/08B01D67/00
Inventor 汪朝晖汪效祖殷俊霞
Owner 南京久盈膜科技有限公司
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