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Flat Membrane Cassettes for Wastewater Treatment

A technology for treating wastewater and flat membranes, which is applied in the field of flat membrane boxes, can solve the problems of not considering pressure loss, increasing the cost of wastewater treatment, and increasing the driving load, and achieves the effects of low cost, increased permeate water volume, and low power

Active Publication Date: 2017-09-01
TOYOBO MC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such a chosen flat membrane box, the pressure loss during suction is not taken into account
As a result, the driving load for the suction pump and the blower for membrane washing becomes high, thereby increasing the cost for treating wastewater

Method used

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  • Flat Membrane Cassettes for Wastewater Treatment
  • Flat Membrane Cassettes for Wastewater Treatment
  • Flat Membrane Cassettes for Wastewater Treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A membrane cassette having the following configuration was prepared to give a flat membrane cassette for treating wastewater.

[0072] Peripheral regions (width: 12.5 mm) made of vinyl chloride resin each having a different thickness were attached without gaps to both the front and back sides of a film support plate (height: 315 mm; width: 225 mm) made of vinyl chloride resin , to prepare a membrane support plate in which the peripheral area is 6 mm and the peripheral area is higher than the central area by an extent of 1 mm. Also, a rectangular penetrating region is formed on a part of the membrane support plate. 8mm for the outlet of the permeate water in a way to connect to the through area 2 A nozzle of cross-sectional area is attached to it to withdraw the treated water.

[0073] A resin mesh (DOP-18K, manufactured by Nippon Filcon; height: 290 mm; width: 200 mm) as shown in Table 1 was set to the central area of ​​the membrane support plate as a channel material...

Embodiment 2

[0078] A flat membrane cassette having the same configuration as in Example 1 was prepared except that the peripheral area of ​​the flat membrane cassette was made 1.2 mm higher than the central area of ​​the flat membrane cassette, and a resin mesh with a porosity of 26.3% (DOP- 15K, manufactured by Nippon Filcon). The details of the flat membrane cassette of Example 2 are shown in Table 1.

Embodiment 3

[0080] A flat membrane cassette having the same configuration as in Example 1 was prepared except that the peripheral area of ​​the flat membrane cassette was made 2.0 mm higher than the central area of ​​the flat membrane cassette, and a resin mesh with a porosity of 52.7% (by Clever manufacture). Details of the flat membrane cassette of Example 3 are shown in Table 1.

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Abstract

To provide a flat membrane cartridge with which it is possible to select a channel material and a buffer material that can reduce pressure loss and reduce suction pressure distribution on the surface of a separation membrane, and which can increase a waste water processing flow rate per unit membrane surface area using low power. Provided is a flat membrane cartridge for waste water processing, in which, with respect to the front and back surfaces of a membrane support plate which is made of resin and which has a level difference on the front and back surfaces so that the edges are higher than the center, separation membranes are adhered to such front and back surfaces along the edges thereof so as to cover the center of the membrane support plate. The flat membrane cartridge is characterized by the following: between the center of the membrane support plate and the separation membrane, disposed are a channel material and a buffer material, in that order from the membrane support plate side; the channel material has openings of 0.5-3.2mm in the horizontal and vertical directions, a wire diameter of 0.4-1.0mm in the horizontal and vertical directions, a thickness of 0.6-2.0mm, and a porosity of 20-60%; and the buffer material has a basis weight of 10-110g / m2, and a thickness of 0.1-0.5mm.

Description

[0001] technical field of invention [0002] The invention relates to a flat membrane cassette for membrane filtration separation in a device for treating wastewater by membrane filtration. Background technique [0003] In recent years, against the background of world population increase, industrialization, urbanization, and improvement of living standards, requirements for the quality and quantity of daily water and industrial water have been increasing. [0004] In order to maintain water resources, in addition to the conventional utilization of natural water obtained from nature, there is a method in which fresh water is prepared from seawater using an evaporation method or a reverse osmosis (RO) method in which salty brine Methods of preparing fresh water, etc. However, it has been reported that fresh water resources existing in nature are limited, and furthermore, the possibility of utilizing them tends to become narrower due to the influence of abnormal climate in recen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/08B01D63/00C02F1/44
CPCC02F1/44C02F2201/006B01D2313/146B01D2315/06B01D63/0822
Inventor 岛田宪史森田纯辅北河亨东昌男
Owner TOYOBO MC CORP