Hollow fiber curtain type film assembly

A curtain membrane and fiber membrane technology, applied in the field of water treatment, can solve the problems of high energy consumption, increased aeration, hollow fiber membrane filaments and other problems

Active Publication Date: 2008-09-03
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 curtain membrane modules generally have a problem: the root of the hollow fiber membrane has serious mud accumulation, and once the mud is formed, it is not easy to clear, 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 of the membrane will further aggravate the inhomogeneity of filtration and the loss of effective filtration area, and ultimately shorten the service life of the entire membrane module
The main measure taken by the hollow fiber curtain membrane modules currently on the market to suppress membrane fouling is to install a perforated aeration tube directly below the membrane module, such as Figure 11 As shown, the hollow fiber membrane bundles can be hydraulically scoured by the air-water two-phase flow formed by high-intensity aeration. Although the pollution in the middle of the hollow fiber membrane bundles can be reduced to a certain extent, the water flow at the root of the hollow fiber membrane bundles is turbulent. The performance is still very poor, and the phenomenon of mud accumulation at the root of the membrane filament is relatively serious, especially when the hollow fiber membrane bundle is placed vertically, because the gas-water two-phase flow is blocked by the lower end of the hollow fiber membrane bundle during the rising process, therefore, the lower end of the hollow fiber membrane bundle The phenomenon of mud accumulation on the casting end surface of the head is more serious
Increasing the amount of aeration not only makes the operating energy consumption of the membrane bioreactor adopting this kind of hollow fiber curtain membrane module significantly higher than other sewage biochemical treatment processes, but also the phenomenon of sludge accumulation at the root of the membrane filament is still not effectively solved

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0071] Such as figure 1 , image 3 , Figure 5 As shown, a hollow fiber curtain membrane module comprises a housing 1 with a length of 600 mm and a width of 60 mm and a material made of UPVC (un-plasticized polyvinyl chloride) plastic, which is arranged in the housing 1 and placed vertically by 498 hollow A hollow fiber membrane bundle 3 composed of fiber membranes 2, 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 2 is 2.8 mm, and the material is polyvinylidene fluoride , the two ends are poured with epoxy resin and collected in the upper end 4 and the lower end 5, and they are re-cast with polyurethane to protect the root of the membrane. The overall shapes of the upper end 4 and the lower end 5 are long and rectangular, with a length of 585 mm and a width of 30 mm. Both the upper end head 4 and the lower end head 5 are provided with a permeated water collection cha...

Embodiment 2

[0077] Such as figure 2 , Figure 4 , Figure 6 As shown, a hollow fiber curtain membrane module includes a housing 1 with a length of 600 mm and a width of 60 mm made of UPVC plastic, and a hollow hollow fiber membrane composed of 398 hollow fiber membrane filaments 2 that is arranged in the housing 1 and placed vertically. The fiber membrane bundle 3 and the hollow fiber membranes 2 have an average pore diameter of 0.4 μm for the liquid to pass through, the outer diameter of the hollow fiber membranes is 2.8 mm, and the material is polyvinylidene fluoride. The upper end of the hollow fiber membrane bundle 3 can swing freely, and each membrane filament is in a closed-cell state, which is sealed with flexible epoxy resin, and the lower end is cast with epoxy resin and collected in the lower end head 5, and is treated twice with polyurethane. Casting to protect the root of the membrane filament. The overall shape of the lower end 5 is a long rectangle with a length of 585mm...

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Abstract

The invention discloses a hollow fiber curtain-type membrane component, which comprises a hollow fiber membrane bundle composed of a plurality of hollow fibrous membrane threads, the end head(s) at one end or the both ends of the hollow fiber membrane bundle, an air inlet pipe and a water producing pipe. The end presents a strip shape, an air distribution device with an air distribution hole is arranged at least one end, the air distribution device is communicated with the air inlet pipe, and the hole opening of the air distribution hole is opened towards the top part of the hollow membrane fiber; the end head(s) at one end or the both ends of the hollow fiber membrane bundle refers that the end head(s) is (are) provided at one end or the both ends of the hollow fiber membrane bundle. The invention also discloses a membrane bioreactor utilizing the hollow fiber membrane component and water treatment equipment. The hollow fiber membrane component disclosed by the invention has the structural characteristics that the anti pollution performance of the hollow fiber membrane component is enhanced, particularly the anti pollution performance of the root of the hollow fiber membrane is enhanced, the effective filtering areas of the hollow fibrous membrane threads are ensured, the service life of the hollow fiber membrane component is prolonged, and the processing, the assembly, the installation and the reparation of the hollow fiber membrane component are very convenient.

Description

technical field [0001] The invention relates to membrane separation water treatment equipment, in particular to a hollow fiber curtain membrane module applied to water treatment and a membrane bioreactor utilizing the hollow fiber curtain 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/12C02F1/44
CPCY02W10/10
Inventor 孙友峰
Owner BEIJING ECOJOY WATER TECH
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