Plate-shaped corrugated membrane diaphragm having uniform aperture and preparation method thereof

A technology of corrugated membrane and diaphragm, which is applied in the field of plate-shaped corrugated membrane and its preparation, can solve the problems of hydrophilic performance, poor pore size uniformity, low filling area, hindering the development of the membrane industry, etc., and achieve good comprehensive performance and good pore size The effect of uniformity

Active Publication Date: 2017-03-22
BEIJING ORIGIN WATER FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Membrane processing speed and pollution resistance have always been the direction of continuous work for R&D personnel, and related cost issues such as product cost, operating cost, and maintenance cost have always been important issues that hinder the faster and better development of the membrane industry.
[0004] The existing flat membrane has the problems of low filling area and high manufacturing and operating costs due to the lamination of the diaphragm.
Due to the original PVDF raw material, there is a problem of poor hydrophilicity, which restricts the fouling resistance of the membrane
However, the conventional molding method makes it have the problem of uneven pore size distribution, which can lead to uneven fouling of the membrane and affect the overall fouling resistance.
[0005] Existing flat membranes have poor hydrophilicity and pore size uniformity, resulting in poor pollution resistance
And due to the problem of running fit, it is impossible to enlarge the filling area
[0006] The existing diaphragm with a certain corrugated design has complicated molding process, and also has problems such as hydrophilic performance and poor uniformity of pore size.

Method used

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  • Plate-shaped corrugated membrane diaphragm having uniform aperture and preparation method thereof
  • Plate-shaped corrugated membrane diaphragm having uniform aperture and preparation method thereof
  • Plate-shaped corrugated membrane diaphragm having uniform aperture and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 As shown, a method for preparing a plate-shaped corrugated film membrane with uniform apertures comprises the following steps: adopting a plate-shaped film with a corrugated form, including a high-energy radiation etching step, a PET extrusion molding step and an imprinted radiation hole-forming step;

[0046] The PET extrusion molding step adopts the form of extruding PET to form a special-shaped diaphragm, and the formation of uniform holes is completed on the special-shaped diaphragm by using the nuclear pore membrane forming process step;

[0047] The imprinting radiation hole forming step includes a high energy radiation etching step;

[0048] Finally, a corrugated PET film with uniform pore size is prepared.

[0049] The PET material corrugated plate membrane can effectively prevent the membrane from sticking during operation. The hydrophilicity of the PET material body is...

Embodiment 2

[0055] Embodiment 2: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 As shown, a method for preparing a plate-shaped corrugated membrane diaphragm with a uniform aperture comprises the following steps;

[0056] Step 1. Dry the PET raw material first, turn on the extruder 1, add the dry PET raw material into the feed port 1-1, pass through the extrusion mixing conveying section, and extrude the diaphragm of the required shape from the extrusion nozzle 3 .

[0057] Among them, the moisture content of PET raw materials needs to be controlled at 0.001-0.01%;

[0058] The temperature control preheating section is between 150-200 degrees, the conveying section is between 180-260 degrees, and the extrusion section is between 240-300 degrees;

[0059] Adjust the extrusion speed and traction speed to obtain a PET sheet with a thickness of 5-200 μm;

[0060] The corrugation height H of the extruded diaphragm is 0.5-5mm, and the length L is 0.5-10mm.

[...

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Abstract

The invention relates to a plate-shaped corrugated membrane diaphragm having uniform aperture and a preparation method thereof, which belong to the technical field of sewage processing. According to the invention, a plate-shaped membrane having a corrugated shape is employed, and the method comprises a high-energy radiation etching step, a PET extrusion moulding step and a marking radiation pore-forming step; the PET extrusion moulding step employs a PET extrusion form to form a heterotype diaphragm, a nuclear track membrane moulding technology step is used on the heterotype diaphragm for completing the moulding of the aperture; and the plate-shaped corrugated membrane diaphragm having uniform aperture is prepared. The plate-shaped corrugated membrane diaphragm having uniform aperture has the advantages that PET extrusion moulding and the marking radiation pore-forming technology are combined, the corrugated plate-shaped membrane is obtained through PET extrusion, diaphragm applying while operation can be effectively prevented, the hydrophilic performance of a PET material is stronger than that of PVDF, good aperture uniformity can be guaranteed by the radiation pore-forming technology, and better effect of the plate-shaped corrugated membrane can be obtained through a plurality of effects.

Description

technical field [0001] The invention relates to a plate-shaped corrugated membrane membrane with uniform aperture and a preparation method, belonging to the technical field of sewage treatment. Background technique [0002] The traditional flat membrane used for sewage has poor pollution resistance, and the materials are mostly PVDF, PTFE, etc., so the hydrophilicity is poor. Although many company scholars have studied modification methods, most of them are temporary hydrophilic modification. As the operation time increases, the hydrophilicity will be lost, and it is extremely difficult to actually complete permanent hydrophilic modification. On the other hand, due to the uneven pore size, it is also easy to cause changes in the pollution sequence, thereby affecting the overall pollution resistance effect. On the other hand, the filling area cannot be made large due to the lamination problem of the flat film. [0003] At present, the problem of membrane treatment of sewage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/00B01D71/48
CPCB01D67/0002B01D69/00B01D71/48
Inventor 陈亦力彭兴峥代攀李岩
Owner BEIJING ORIGIN WATER FILM TECH
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