Hollow fiber film assembly, film bioreactor and water treatment device

Abstract

The invention discloses a hollow fibrous membrane component, which comprises hollow fibrous membrane bundle composed of a plurality of hollow fibrous membrane threads, the end of the hollow fibrous membrane bundle, an air inlet pipe, a water producing pipe and an air distribution device with an air distribution hole. The end surface of the end adopts a raised end, the air distribution device is communicated with the air inlet pipe, the position of the air distribution hole is near to the bottom part of the raised end surface when the hollow fibrous membrane component is vertically arranged, and the hole opening of the air distribution hole is opened towards the top part of the raised end surface. The invention also discloses a membrane bioreactor utilizing the hollow fibrous membrane component and water treatment equipment. The hollow fibrous membrane component disclosed by the invention has the structural characteristics that the anti-pollution performance of the hollow fibrous membrane component is enhanced, particularly the anti-pollution performance of the root of the hollow fibrous membrane is enhanced, the effective filtering areas of the hollow fibrous membrane threads are ensured, the service life of the hollow fibrous membrane component is prolonged, and the processing, the assembly, the installation and the reparation of the hollow fibrous membrane component are veryconvenient.

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...

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 tube 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, and the casting end face is flat. Such a structure causes the generated aeration airflow to be unable to thoroughly clean the roots of the membrane filaments. The roots of hollow fiber membranes are still prone to serious sludge accumulation

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