Hollow fiber film component

Abstract

The invention discloses a hollow fibrous membrane module, which comprises a hollow fibrous membrane bundle composed of a plurality of hollow fibrous membrane threads, two end heads arranged at the two ends of the hollow fibrous membrane bundle, an air inlet pipe and a water outlet pipe; an air distributor with air distribution holes which is arranged on the end surface of at least one end head communicates with the air inlet, and the orifices of the air distribution holes face toward the roots of the hollow fibrous membrane threads. The invention also discloses a membrane bioreactor and a water treatment device which utilize the hollow fibrous membrane module. The hollow fibrous membrane module disclosed by the invention is structurally characterized in that the anti-fouling property of the hollow fibrous membrane module is improved, especially the anti-fouling property of the hollow fiber roots, so that the effective filtration area of the hollow fibrous membrane threads is ensured, the service life of the hollow fibrous membrane module is prolonged, and the processing, the assembly, the installation and the maintenance of the hollow fibrous membrane module are all very convenient.

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 using 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 of a...

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Problems solved by technology

[0019] These patents and patent applications still have the following problems: the phenomenon of sludge accumulation at the root of the hollow fiber membrane bundle is serious, and once the sludge is formed, it is not easy to remove it, which reduces the effective area of ​​the membrane module and the uniformity of filtration. The continued development and spread of membrane fouling will further aggravate the inhomogeneity of filtration and the loss of effective filtration area, ultimately shortening the service life of the entire hollow fiber membrane bundle

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

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