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A flat-plate membrane element with uniform water production flux

A flat membrane, water flux technology, applied in membrane technology, semi-permeable membrane separation, biological water/sewage treatment, etc., can solve the problems of high energy consumption and operating costs, reduction of filtration area, cost waste, etc., to reduce investment cost, improve the overall level, and save the effect of operating costs

Inactive Publication Date: 2016-07-13
SHANGHAI SEVOO ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After local fouling, the effective filtration area is reduced. In order to ensure a constant flux, only by increasing the membrane flux in other regions can compensation be made. The phenomenon of regional supercritical flux operation and unbalanced flux distribution is more serious, resulting in more For rapid membrane fouling, and finally a catastrophic membrane fouling accident
[0005] In order to improve and eliminate this phenomenon, it is necessary to reduce the level of critical flux as a whole, so that all areas are strictly operated at subcritical flux, which will cause serious cost waste (conservative value of flux is currently used in many engineering applications) method, which means that the actual membrane flux cannot meet the nominal requirements); or greatly increase the aeration scour intensity and cleaning frequency, which will result in higher energy consumption and operating costs

Method used

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  • A flat-plate membrane element with uniform water production flux
  • A flat-plate membrane element with uniform water production flux
  • A flat-plate membrane element with uniform water production flux

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] see figure 1 , figure 2 , the aperture of the current-limiting water-collecting hole 5 is 1mm, the cross-sectional area of ​​each water-producing branch pipe 4 is 4mm×4mm, and the quantity of the single-sided current-limiting water-collecting hole 5 of a single water-producing branch pipe 4 is 100, and the hole spacing is 4mm , 200 water production branch pipes 4 are horizontally arranged, parallel to each other, isolated from each other, and converge into the vertical water production pipes on both sides. The cross-sectional area of ​​the water production main pipe 3 is 40mm×5m.

[0028] In the specific implementation, general-purpose products are used, such as the substrate 1 is assembled by hollow board, Wantong board and injection molded parts, and the periphery of the two diaphragms 2 forms a closed flat plate with the substrate 1 by means of ultrasonic, hot-melt or glue. Membrane elements.

example 2

[0030] see image 3 , Figure 4 , the aperture of the flow-limiting water-collecting hole 5 is 1mm, and the cross-sectional area of ​​each water-producing branch pipe 4 is 4mm×4mm. The water production branch pipes 4 are arranged obliquely, and 100 rows of water production branch pipes intersect and communicate with each other to form an "x" network. The water production branch pipes 4 are connected to the vertical water production main pipe 3 along a 45-degree direction. The cross-sectional area of ​​the water production main pipe 3 is 40mm×5mm.

[0031] In specific implementation, existing products, such as heat-shrinkable and cold-fixed plastic filter screens and injection molded parts are used to assemble the substrate 1, and the peripheral edges of the two diaphragms 2 are formed with the substrate 1 by means of ultrasonic waves, hot-melt or glue. Closed flat membrane element.

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Abstract

A flat film component of a water -producing flux is composed of 2 film plates and 2 film films set at the front and back surfaces of the substrate.The closed capacity cavity, the left and right sides of the substrate have two water -producing pipes. The substrate setting is set up with a horizontal hollow water production tube.The head of the root production water pipe, and the left and right ends of each water -producing tube pipe are connected to the corresponding water production general pipe.The water entry end of the streaming water collection, the water intake end of the water -limiting water pores and the corresponding membrane contact.It can realize the relatively balanced amount of membrane water production in each unit area of the membrane surface, restricting the emergence of supercritical flux, which will not only help increase the overall level of the critical flux of the membrane product, reduce investment costs, but also help reduce energy consumption consumption., Save running costs.

Description

technical field [0001] The invention belongs to the technical field of water treatment microfiltration and ultrafiltration, and in particular relates to a flat membrane element of a submerged membrane bioreactor (MBR). Background technique [0002] According to the research conclusion, most of the fouling of MBR membrane device is caused by the sludge deposition on the membrane surface. The concept of critical flux is the product of the two contradictory and balanced trends of fouling and scouring and stripping during the operation of the membrane device, and the subcritical flux (below the critical flux) operation mode is the current MBR membrane device operation restriction and delayed membrane flow. main method of contamination. However, due to the unreasonable structural design of the membrane elements in the prior art, the distribution of the membrane water flux is not uniform. (higher than the critical flux) state, while the membranes in other regions produce little ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/08C02F3/00
Inventor 吴华朱祝培
Owner SHANGHAI SEVOO ENVIRONMENT TECH
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