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Flat membrane type separation membrane element, element unit, flat membrane type separation membrane module, and operation method of flat membrane type separation membrane module

A separation membrane and element technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problem of high energy consumption of diffuser blowers, and achieve the effects of increased sloshing, long-term stable operation, and improved durability

Active Publication Date: 2021-08-24
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the high energy consumption of the diffuser blower is a problem of the membrane separation activated sludge method, and a separation membrane element and a separation membrane module that can clean the surface of the membrane even if the amount of diffused air is reduced are required.

Method used

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  • Flat membrane type separation membrane element, element unit, flat membrane type separation membrane module, and operation method of flat membrane type separation membrane module
  • Flat membrane type separation membrane element, element unit, flat membrane type separation membrane module, and operation method of flat membrane type separation membrane module
  • Flat membrane type separation membrane element, element unit, flat membrane type separation membrane module, and operation method of flat membrane type separation membrane module

Examples

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Effect test

Embodiment 1

[0270] Polyvinylidene fluoride (PVDF, weight average molecular weight: 280,000) was used as the resin component for the film-forming stock solution. In addition, polyethylene glycol (PEG20,000, weight average molecular weight: 20,000) was used as a cell opening agent, N,N-dimethylformamide (DMF) was used as a solvent, and H 2 O. These were fully stirred at a temperature of 95° C. to prepare a membrane-forming stock solution having the following composition.

[0271] Polyvinylidene fluoride (PVDF): 13.0% by weight

[0272] Polyethylene glycol (PEG20,000): 5.5% by weight

[0273] N,N-Dimethylformamide (DMF): 78.0% by weight

[0274] h 2 O: 3.5% by weight

[0275] As a substrate, use an apparent density of 0.6g / cm 3 , a rectangular polyester fibrous embossed non-woven fabric with a width of 50 cm x a length of 150 cm and a dense fusion rate of 25%. After the above-mentioned film-making stock solution is cooled to 30 ° C, it is coated on the substrate. After coating, immedia...

Embodiment 2

[0284] A flat-membrane separation membrane element was produced in the same manner as in Example 1, except that the resin provided on the diafiltration side of the separation membrane was changed to ethylene / vinyl acetate copolymer resin (manufactured by TEXYEAR INDUSTRIES INC., trade name: 703A). Element unit, flat membrane type separation membrane module.

Embodiment 3

[0286] A flat-membrane separation membrane element, element unit, flat membrane type separation membrane module.

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Abstract

The present invention relates to a flat-membrane type separation membrane element, in which a separation membrane pair is formed, the separation membrane pair is arranged such that the surfaces on the permeation side of the separation membrane face each other, and the inside of the separation membrane pair is provided with The flow path material has an area of ​​a highly elastic region satisfying a flexural modulus of 100 to 1000 MPa in at least one direction and a maximum flexural stress of 1 to 15 MPa in the area of ​​the filtration region of the separation membrane pair at least 10%.

Description

technical field [0001] The present invention relates to a flat-membrane separation membrane element, an element unit, a flat-membrane separation membrane module, and an operation method for a flat-membrane separation membrane module suitable for water treatment fields such as drinking water production, water purification treatment, and waste water treatment, and the food industry field . Background technique [0002] In recent years, separation membranes in the form of flat membranes or hollow fiber membranes have been used in the fields of water treatment and food industry. For example, a membrane element in which a separation membrane is arranged and a membrane module in which a plurality of the membrane elements are arranged are used in a water purification treatment device. For separation membranes, there are precision filtration membranes, ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes, and forward osmosis membranes in terms of pore size...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/06B01D63/08B01D65/08B01D69/10C02F1/44
CPCB01D65/08C02F1/44B01D63/08B01D63/16B01D65/02B01D69/06B01D69/02B01D69/1071B01D2325/24B01D2313/146B01D2319/04B01D2321/185B01D2325/08C02F2303/16B01D63/089
Inventor 冈本宜记加藤慧北出有
Owner TORAY IND INC