Hollow fiber membrane module and its operation method

An operation method and technology of hollow fiber membranes, applied in chemical instruments and methods, membranes, membrane technologies, etc., can solve the problems of increased liquid resistance of separation membranes, blocked pores of separation membranes, and reduced cleaning effect of medicinal liquids.

Active Publication Date: 2021-04-09
TORAY IND INC
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, if the water to be treated is subjected to membrane separation, the suspended substances contained in the water to be treated (hereinafter also referred to as "turbidity") and the membrane-impermeable substances such as organic matter slowly accumulate on the surface of the membrane. , Adhesion and accumulation in the pores of the membrane, causing the pore blockage of the separation membrane
As a result, the liquid passage resistance of the separation membrane increases, and the membrane separation will not be possible soon.
[0004] In order to remove pore clogging and restore membrane separation performance, the separation membrane is usually washed with a chemical solution, but if the turbidity is still accumulated, the cleaning effect of the chemical solution will decrease
Or, although the separation performance of the membrane can be restored by repeated washing with the chemical solution, the amount of chemical solution used and the washing time increase, so there is also a disadvantage in terms of disposal cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hollow fiber membrane module and its operation method
  • Hollow fiber membrane module and its operation method
  • Hollow fiber membrane module and its operation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0474] Hereinafter, although an Example and a comparative example are given and this invention is concretely demonstrated, this invention is not limited to these Examples.

[0475] The performance evaluation method of the hollow fiber membrane is as follows.

[0476]

[0477] A small module with an effective length of 200mm consisting of 4 porous hollow fiber membranes was produced. Send distilled water to the module at a temperature of 25°C and a filter pressure difference of 16kPa for 1 hour, and measure the resulting permeated water (m 3 ), converted into unit time (h) and unit membrane area (m 2 ) value, and then converted to the pressure (50kPa) to obtain the pure water permeability (m 3 / m 2 / hr). In addition, the unit membrane area is calculated from the average outer diameter and the effective length of the porous hollow fiber membrane.

[0478]

[0479] Using a tensile testing machine (TENSILON (registered trademark) / RTM-100, manufactured by Toyo Bordowin Co....

reference example 1

[0523] (Reference example 1) Manufacturing method of hollow fiber membrane A

[0524] 36% by weight of a vinylidene fluoride homopolymer (KF1300 manufactured by KLEHA Co., Ltd., weight average molecular weight: 417,000, number average molecular weight: 221,000) and 64% by weight of γ-butyrolactone were dissolved at 150°C. The Tc of this vinylidene fluoride homopolymer solution was 48°C. The solution was set up with 2 gear pumps, pressurized to 2.0MPa on the pipeline between them, and stayed at 99-101°C for 20 seconds, and then discharged from the outer tube of the double-tube die, while the γ - An 85% by weight aqueous solution of butyrolactone was discharged from the inner tube of the double tube die, and was solidified by staying in a cooling bath at a temperature of 25° C. consisting of an 85% by weight aqueous solution of γ-butyrolactone for 20 seconds. The obtained porous hollow fiber had a columnar structure with a thickness uniformity of 0.62, a columnar structure occu...

reference example 2

[0526] (Reference example 2) Production of hollow fiber membrane module

[0527] The method for producing the hollow fiber membrane module will be described below.

[0528] The hollow fiber membrane was cut into a length of 1800 mm, immersed in a 30% by mass glycerin aqueous solution for 1 hour, and then air-dried. The hollow fiber membrane was heat-treated in water vapor at 125° C. for 1 hour, air-dried, and cut into lengths of 1200 mm. The predetermined number of hollow fiber membranes thus obtained are bundled into one bundle. One end of the hollow fiber membrane bundle was sealed with a silicone adhesive (SH850A / B, manufactured by Toray Dow Corning Co., Ltd., two components were mixed at a mass ratio of 50:50).

[0529] On the inner surface of the polysulfone cylindrical case 3 (inner diameter 150 mm, outer diameter 170 mm, length 1150 mm), the area to which the hollow fiber membrane is to be bonded was previously sanded with sandpaper (#80) and degreased with ethanol. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
breaking strengthaaaaaaaaaa
lengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The present invention provides a hollow fiber membrane module capable of effectively removing the accumulation of suspended matter in the membrane module, realizing reduction in operating cost, and capable of stable operation, and an operation method thereof. The hollow fiber membrane module of the present invention is characterized in that it has a cylindrical casing, a plurality of hollow fiber membranes, and a first sealing part, the cylindrical casing has a first end and a second end in the height direction, and a plurality of hollow fiber membranes. The membrane is housed in the cylindrical case, the first sealing part is housed in the cylindrical case, and the ends of a plurality of hollow fiber membranes located on the first end side of the cylindrical case are combined in an open state, and the hollow fiber The membrane is a porous hollow fiber membrane with a breaking strength of 23MPa or more, and the membrane area per unit volume of the hollow fiber membrane module is 800m 2 / m 3 Above 3700m 2 / m 3 Hereinafter, in a section perpendicular to the height direction of the cylindrical case, the filling rate of the hollow fiber membrane is 25% or more and 38% or less.

Description

technical field [0001] In particular, the present invention relates to a hollow fiber membrane module for membrane-separating untreated water containing a high concentration of suspended matter and its operating method. Background technique [0002] In recent years, separation membranes such as precision filtration membranes and ultrafiltration membranes have the advantages of energy saving and space saving, and from the perspective of separation ability, they have the characteristics of labor saving and product quality improvement, so they are widely used in the food industry and medical fields. , water manufacturing, and wastewater treatment fields as representatives of various processes have been applied. [0003] On the other hand, if the water to be treated is subjected to membrane separation, the suspended substances contained in the water to be treated (hereinafter also referred to as "turbidity") and the membrane-impermeable substances such as organic matter slowly a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/02B01D65/02B01D69/02B01D69/08B01D71/34C02F1/44
CPCB01D65/02B01D69/02B01D69/08B01D71/34B01D67/0027B01D2321/12C02F1/444B01D63/02B01D65/08B01D2321/04B01D2325/24B01D69/081B01D2321/10C02F2303/16C02F1/44
Inventor 志村俊岩井健太花川正行北出有木村将弘小林敦西尾彩
Owner TORAY IND INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap