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Hollow fiber film assembly

A fiber membrane and fiber membrane bundle technology, which is applied in the field of water treatment, can solve the problems of reducing the filtration uniformity of the effective area of ​​​​the filtration of the membrane module, which has not been solved, and cannot be purged and washed at the root of the membrane filament.

Active Publication Date: 2008-08-27
BEIJING ECOJOY WATER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned hollow fiber membrane modules all have a common problem: the root of the hollow fiber membrane has serious sludge accumulation, and once the sludge is formed, it is not easy to remove, which reduces the effective area of ​​the membrane module and the uniformity of filtration. The continuous development and spread of membrane fouling at the root will further aggravate the inhomogeneity of filtration and the loss of effective filtration area, which will eventually shorten the service life of the entire hollow fiber membrane module
The solution disclosed in Chinese patent application 200510049324.5 is to divide the hollow fiber membranes into several bundles and evenly distribute them around the central aeration pipe, and use the airflow provided by the aeration head at the bottom of the membrane module to hydraulically flush the fiber membrane bundles. To a certain extent, the pollution in the middle of the hollow fiber membrane is reduced, but the phenomenon of mud accumulation at the root of the hollow fiber membrane bundle has not been solved
At present, there is a membrane module product similar to the aforementioned patent application on the market, which pre-embeds a short tube in the lower end of each fiber membrane bundle, and the gas is aerated through the short tube to strengthen the root of the fiber membrane bundle. However, the mouth of the short pipe faces upwards, and the upper edge of the mouth is higher than the casting end face of the hollow fiber membrane by a certain height, so the aeration airflow generated in this way cannot thoroughly sweep and wash the roots of the membrane filaments, and cannot Prevent mud accumulation at the root of the upper end of the hollow fiber membrane bundle, so the problem of mud accumulation at the root has not been well resolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as figure 1 , image 3 As shown, a hollow fiber membrane module includes a housing 1 with an inner diameter of 90 mm and a material made of UPVC (un-plasticized polyvinyl chloride) plastic, and a hollow fiber composed of 240 hollow fiber membrane filaments 2 arranged in the housing 1 Membrane bundle 3, the average pore diameter of the micropores of the hollow fiber membranes 2 for passing liquid is 0.4 μm, the outer diameter of the hollow fiber membranes is 2.8 mm, the material is polyvinylidene fluoride, the upper end can swing freely, each membrane The filaments are in a closed-cell state, sealed with flexible epoxy resin, and the lower end is cast with epoxy resin and collected in the end 4, and it is re-cast with polyurethane to protect the root of the membrane filament. The overall shape of the terminal 4 is cup-shaped, and the diameter of the top circle is 60mm. Hollow fiber membranes 2 are open in the water production collection chamber 5 in the end 4, and...

Embodiment 2

[0063] Such as figure 2 , Figure 4 As shown, a hollow fiber membrane module includes a housing 1 with an inner diameter of 65 mm and a material made of UPVC (un-plasticized polyvinyl chloride) plastic, and a hollow fiber composed of 300 hollow fiber membrane filaments 2 arranged in the housing 1 Membrane bundle 3, the average pore diameter of the micropores of the hollow fiber membranes 2 for passing liquid is 0.1 μm, the outer diameter of the hollow fiber membranes is 1.35 mm, the material is polyvinylidene fluoride, the lower end can swing freely, each membrane The filaments are in a closed-cell state, sealed with flexible epoxy resin, and the upper end is cast with epoxy resin and collected in the end 4, and it is re-cast with polyurethane to protect the root of the membrane filament. The overall shape of the terminal 4 is cup-shaped, and the diameter of the upper circle is 45 mm. Hollow fiber membranes 2 are open in the water production collection chamber 5 in the end ...

Embodiment 3

[0068] The structure of the membrane module is the same as that of Example 1.

[0069] Such as Figure 7 As shown, eight hollow fiber membrane modules, water collection head 18, central pipe 19 and water outlet 20 form a radial membrane module unit. The water production pipe 6 is connected with eight quick-plug connectors 12 evenly distributed on the lower end surface of the water collection end 18 with a diameter of 150 mm. The three membrane modules are evenly distributed around the center pipe 19, and the bottom of the center pipe 19 is connected with the inlet pipes 7 of the eight hollow fiber membrane modules through eight quick-plug connectors 12. When the membrane module unit is working, the hollow fiber membrane bundle 3 is surrounded by the liquid to be filtered, and the compressed air provided by the air source enters from the upper opening of the central pipe 19, and enters the inlet pipe 7 of the eight membrane modules, and finally passes through the terminal 4. Th...

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Abstract

The invention discloses a hollow fabric membrane component, which comprises a hollow fabric membrane bundle composed of a plurality of hollow fabric membrane filaments, an end head at one end of the hollow fabric membrane bundle, an air inlet pipe and a water outlet pipe. The invention is characterized in that an air distribution device with air distribution pores is arranged on the end surface of the end head, the gas distribution device is communicated with the air inlet pipe, the orifices of the air distribution pores face to the root of the hollow fabric membrane filaments. The invention further discloses a membrane bioreactor and a water treatment device employing the hollow fabric membrane component. Structure characteristics of the hollow fabric membrane component increases the pollution resistant property of the hollow fabric membrane component, in particular the pollution resistant property of the hollow fabric membrane root, guarantees effective area of hollow fabric membrane filaments filtration, prolongs the service life of the hollow fabric membrane component, and the hollow fabric membrane component has convenient process, assembly, installment and maintenance.

Description

technical field [0001] The invention relates to membrane separation water treatment equipment, in particular to a hollow fiber membrane module applied to water treatment and a membrane bioreactor utilizing the hollow fiber membrane module, belonging to the technical field of water treatment. Background technique [0002] The membrane bioreactor (Membrane Bioreactor, MBR) process is an efficient sewage treatment and reuse technology that organically combines membrane separation technology and traditional biological treatment technology. In the MBR system, all kinds of pollutants in the sewage are mainly removed through the biochemical action of microorganisms, but unlike the traditional biological treatment process, the membrane module replaces the secondary settling tank and completely separates the mud and water with its high-efficiency separation. The sludge retention time and the hydraulic retention time can be independent of each other, the increase of the concentration ...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F1/44
CPCY02W10/10
Inventor 孙友峰
Owner BEIJING ECOJOY WATER TECH
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