Reverse osmosis membrane substrate production method based on wet papermaking technology

A technology of reverse osmosis membrane and production method, applied in papermaking, papermaking, textile and papermaking, etc., can solve the problems of large pore size and porosity, poor surface smoothness, poor tensile strength, etc., and achieve good pollution resistance, The effect of uniform moisture and good paper evenness

Inactive Publication Date: 2019-04-23
衢州珮珀新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the prior art film substrate (non-woven fabric) in its longitudinal and transverse tensile strength, poor uniformity, large pore size and porosity, and poor surface smoothness, and provide a method based on wet method The production method of reverse osmosis membrane base material of papermaking technology, the membrane base material produced by this method has good vertical and horizontal tensile strength, good uniformity, uniform pore size distribution, and suitable porosity

Method used

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  • Reverse osmosis membrane substrate production method based on wet papermaking technology
  • Reverse osmosis membrane substrate production method based on wet papermaking technology
  • Reverse osmosis membrane substrate production method based on wet papermaking technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The production method of reverse osmosis membrane base material based on wet papermaking technology, described method step is as follows:

[0026] S1: After preparing the fluffed chemical fiber, mix the slurry, and control the mass concentration of the slurry to 0.5%;

[0027] S2: The slurry is added with a dispersant and defoamer before flushing, and then enters the sand remover. The amount of dispersant is 1% of the slurry mass, and the amount of defoamer is 0.01% of the slurry mass. There are three sections;

[0028] S3: enter the secondary flushing;

[0029] S4: After the second flushing, enter the pressure screen for processing, add PEO retention aid at the outlet of the pressure screen, and the mass dosage of PEO retention aid is 0.003%;

[0030] S5: the slurry in step S4 flows into the headbox and is copied on the Internet;

[0031] S6: press dehydration;

[0032] S7: drying treatment;

[0033] S8: Calender treatment;

[0034] S9: coiling, coupon cutting, p...

Embodiment 2

[0040] A method for producing a reverse osmosis membrane base material based on wet papermaking technology, the method steps are as follows:

[0041] S1: After preparing the fluffed chemical fiber, mix the slurry, and control the concentration of the slurry to 3%;

[0042] S2: Add dispersant and defoamer to the slurry before flushing once, and then enter the sand remover. The amount of dispersant is 3% of the slurry mass, and the amount of defoamer is 0.03% of the slurry mass. There are three paragraphs;

[0043] S3: enter the secondary flushing;

[0044] S4: After the second flushing, enter the pressure sieve for processing, add PEO retention aid at the outlet of the pressure sieve, and the mass dosage of PEO retention aid is 0.006%;

[0045] S5: the slurry in step S4 flows into the headbox and is copied on the Internet;

[0046] S6: press dehydration;

[0047] S7: drying treatment;

[0048] S8: Calender processing;

[0049] S9: coiling, coupon cutting, packaging and wa...

Embodiment 3

[0055] A method for producing a reverse osmosis membrane base material based on wet papermaking technology, the method steps are as follows:

[0056] S1: After preparing the fluffed chemical fiber, mix the slurry, and control the concentration of the slurry to 2%;

[0057] S2: Add dispersant and defoamer to the slurry before flushing once, and then enter the sand remover. The amount of dispersant is 2% of the slurry mass, and the amount of defoamer is 0.02% of the slurry mass. There are three sections;

[0058] S3: enter the secondary flushing;

[0059] S4: After the second flushing, enter the pressure sieve for processing, add PEO retention aid at the outlet of the pressure sieve, and the mass dosage of PEO retention aid is 0.005%;

[0060] S5: the slurry in step S4 flows into the headbox and is copied on the Internet;

[0061] S6: press dehydration;

[0062]S7: drying treatment;

[0063] S8: Calender treatment;

[0064] S9: coiling, coupon cutting, packaging and wareho...

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Abstract

The invention relates to a reverse osmosis membrane substrate production method based on wet papermaking technology. The reverse osmosis membrane substrate production method based on the wet papermaking technology includes the steps of: (1) pulping after preparing relief chemical fibers with slurry mass concentration controlled to be 0.5%-3%; (2) adding dispersant and defoamer before adding the slurry for a first slushing to later on enter a desander with dispersant dosage and defoamer dosage respectively to be 1% -3% and 0.01%-0.03% of slurry quality, and with the desander provided with at least three sections; (3) entering a second slushing; (4) entering a pressure screen for processing after the second slushing is completed, and adding PEO (polyethylene oxide) retention aid at the outlet of the pressure screen with the mass dosage of the PEO retention aid to be 0.003%-0.006%; (5) allowing the slurry of step 4 to flow into a headbox upper net for manufacture paper with pulp; (6) conducting squeeze dewatering; (7) drying; (8) performing calender processing; (9) coiling, rewinding and slitting, and packaging for storage. With the use of the reverse osmosis membrane substrate production method based on the wet papermaking technology, membrane substrate paper of reverse osmosis membranes produced thereby has the advantages of good evenness, uniformity of paper weight, thickness and moisture, small banner quantitative difference and consistent banner moisture, and longitudinal tensile strength reaching 11 kilonewton per meter or more.

Description

technical field [0001] The invention relates to a method for producing a reverse osmosis membrane base material based on wet papermaking technology, and belongs to the technical field of polymer material processing. Background technique [0002] The membrane base material (non-woven fabric) of existing reverse osmosis membrane is widely used in roll-type membrane module, tubular membrane module, flat membrane module and water treatment industry, because the membrane base material (non-woven fabric) of reverse osmosis membrane ) is produced by dry-laid non-woven fabric production process, which has poor longitudinal and transverse tensile strength, poor uniformity, large pore size and porosity, and poor surface smoothness. It is only suitable for use in industrial wastewater treatment, especially not suitable for seawater Desalination, water purification and other aspects of use. As an improvement, in the prior art, the membrane substrate of the reverse osmosis membrane prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F13/00D21G1/00D21H21/08D21H21/12D21H21/10
CPCD21F13/00D21G1/00D21H21/08D21H21/10D21H21/12
Inventor 俞正江陈炳祥
Owner 衢州珮珀新材料科技有限公司
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