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Separation membrane assembly

A separation membrane and component technology, applied in semi-permeable membrane separation, membrane technology, permeation/dialysis water/sewage treatment, etc., can solve the problems of reduced life of membrane elements, reduce membrane service life, ensure recovery rate, and prolong life Effect

Inactive Publication Date: 2020-10-20
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the concentrated water sealing ring in the separation membrane module will be displaced, the actual operating recovery rate will increase and the life of the membrane element will be reduced. A separation membrane module is provided. Through the use of the concentrated water sealing module with a closed space, the membrane is improved. The sealing performance and anti-movement performance in the element can effectively control the pollution of the separation membrane module, thereby ensuring the stable operation and life of the separation membrane module

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 The separation membrane module shown includes a membrane shell, a separation membrane element and a concentrated water sealing module. The concentrated water sealing module is composed of a concentrated water sealing ring. The concentrated water sealing module forms a closed gap after contacting the membrane shell. The contact methods of the membrane shell and the separation membrane element include in turn: closed contact with the membrane shell and separation membrane element (①), only closed contact with the separation membrane element (②), airtight contact with the membrane shell and membrane element (③), and ② The contact length with the separation membrane element is 0.9cm, the airtight gap formed between ① and ③ of the concentrated water sealing module has a porosity of 100%, and the ring shape of the concentrated water sealing module in contact with the membrane shell is triangular. The annular contact between the water sealing module and the me...

Embodiment 3

[0039] Compared with Example 1, the original parameters in the example are only different in the contact mode of ③ in the contact mode between the concentrated water sealing module and the separation membrane element and the membrane housing, and other original parameters are the same, and their specific values ​​are shown in Table 1.

Embodiment 6

[0045] Compared with Example 4, the original parameters in the example are only different in the contact length between the concentrated water sealing module and the separation membrane element and the membrane housing (2) and the contact length with the separation membrane element, and the other original parameters are the same, and the specific values ​​are shown in the table 1.

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Abstract

The invention belongs to the field of separation membrane assemblies. A separation membrane assembly comprises a separation membrane element, a membrane shell and a concentrated water sealing module with a closed gap. The pressure difference between the concentrated water sealing module and the water inlet side and between the concentrated water sealing module and the concentrated water side is increased through a closed gap formed by the concentrated water sealing module and / or the membrane shell and / or the separation membrane element; therefore, the sealing performance of the concentrated water sealing module is improved, the situation that the operation becomes poor due to increase of the actual recovery rate caused by direct leakage of raw water to the concentrated water side is prevented, meanwhile, the stability of the separation membrane element is improved, the recovery rate in the operation process is ensured, and stable operation and service life of the system are ensured.

Description

technical field [0001] The invention relates to the field of separation membrane modules, in particular to a separation membrane module that can be used in water purifiers to improve operation stability. Background technique [0002] In order to remove impurities and microorganisms contained in tap water, surface water, groundwater and other water bodies, so as to obtain clean drinking water and pure water directly used as domestic water, the separation membrane, especially the semi-permeable membrane, such as nanofiltration ( NF) membrane or reverse osmosis (RO) membrane water purifiers are widely used. In reverse osmosis and nanofiltration, spiral wound membrane elements are the most common. The spiral wound membrane element mainly consists of a perforated water collection pipe, a diaphragm, a grid and a surface sealing tape. The diaphragm and the grid are arranged in a fixed pattern and then rolled out along the perforated water collection pipe. The tape is sealed and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/00B01D65/02C02F1/44
CPCB01D63/00B01D65/02C02F1/44
Inventor 宁文娟黄圣散杨瑜芳花田茂久武内纪浩贾格阿克谢吉冨慎一郎
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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