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Filtration membrane module, manufacturing method thereof, and installation method of filtration membrane module

A manufacturing method and membrane filtration technology, which is applied to chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of time required for washing, achieve the effect of reducing washing time and inhibiting the reproduction of microorganisms

Active Publication Date: 2021-08-03
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the membrane filtration modules used in the production line of ultrapure water have the following problems: In order to satisfy the water quality as ultrapure water in a short time after the start of use as described above, the membrane components containing organic substances such as glycerin and alcohol, sodium, etc. In the case of preservation solutions such as metal ions, this washing takes time

Method used

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  • Filtration membrane module, manufacturing method thereof, and installation method of filtration membrane module
  • Filtration membrane module, manufacturing method thereof, and installation method of filtration membrane module
  • Filtration membrane module, manufacturing method thereof, and installation method of filtration membrane module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] The pure water filtered by the ultrafiltration membrane is enclosed in the hollow fiber membrane module, and the hollow fiber membrane module is placed in an oven and heat-treated at 90°C for 16 hours to realize the state where the sterilized pure water is enclosed in the module. In this heat treatment, a bag made of polyethylene (PE) as a pressure buffering means and a cup made of polypropylene (PP) as a volume expansion absorbing means were attached to the nozzle on the raw water side. After completion of the heat treatment, the nozzle was sealed with a predetermined sealing member, and stored in a storage room adjusted to a temperature of 20° C. to 25° C. for 3 months.

[0141] After storage for 3 months, the pure water enclosed as a storage solution was sampled, and the number of viable bacteria in the storage solution was counted. In addition, the respective concentrations of TOC, metal ions, and chloride ions in the storage solution were measured simultaneously. ...

Embodiment 2、3

[0144] Except for changing the heating temperature and heating time to the conditions described in 1, it was carried out in the same manner as in Example 1, and the number of viable bacteria after heat treatment and storage, TOC in the storage solution, metal ions, and chloride ions were measured. their respective concentrations. The results are shown in Table 1. In Example 3, the viable count was 3 after storage for 3 months, but when ultrapure water was produced using each hollow fiber membrane module of this example, immediately after the start of operation, it was possible to obtain ultrapure water that could be used as ultrapure water. Water quality filtered water.

Embodiment 4、5、6

[0146] In the same manner as in Example 1, the number of viable cells after heat treatment and storage, the respective concentrations of TOC in the storage solution, metal ions, and chloride ions were measured. The results are shown in Table 1. When producing ultrapure water using each of the hollow fiber membrane modules of this example, filtered water of water quality usable as ultrapure water was obtained immediately after the start of operation.

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Abstract

An object of the present invention is to provide a filtration membrane module and a manufacturing method thereof that maintain the filtration performance of the filtration membrane, suppress the growth of microorganisms, and do not affect the water quality after use. For this reason, the present invention relates to a hollow fiber membrane module 1, which is provided with a hollow fiber membrane 3a for liquid filtration, and a casing 5 for accommodating the hollow fiber membrane 3a, wherein, in the casing 5, a The preservation solution for maintaining the filtration performance of the hollow fiber membrane 3 a is filled with sterilized pure water.

Description

technical field [0001] The present invention relates to a filtration membrane module suitable as a final filter for removing particles in water to be treated in an ultrapure water production process, a method of manufacturing the same, and a method of installing the filtration membrane module. Background technique [0002] In the production line of ultrapure water used in the manufacture of electronic / electrical components such as semiconductors and display elements, before supplying ultrapure water produced by microfiltration membranes, ion exchange resins, and reverse osmosis filtration membranes to the point of use The final filter for removing particulates from ultrapure water uses a membrane filter module. As the filtration membrane module for this application, since it has the advantage of increasing the filtration flow rate per module, an external pressure filtration type hollow fiber membrane that supplies raw water to the outside of the hollow fiber membrane and per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/44C02F1/02B01D63/02B01D63/00B01D67/00C02F103/04
CPCB01D63/00B01D63/02B01D63/021B01D67/0097C02F1/02C02F1/44C02F2103/04C02F2303/04
Inventor 志岐智中村康人
Owner ASAHI KASEI KK
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