Immersion type hollow fibre membrane assembly with air vents

Abstract

The invention discloses an immersion type hollow fibre membrane assembly with air vents and aims to provide a membrane assembly capable of reducing the impact of air bubbles to membrane threads on theupper end, preventing the membrane threads from generating fatigue damage, prolonging the service life of the assembly, and also reducing the pollution of the upper ends of the membrane threads. A plurality of hollow fibre membrane threads are fixed by two resin fixing layers respectively poured in screw barrels on both ends, the lower ends of the membrane threads are opened on the outer end surface of the resin fixing layer on the lower end, the screw barrel on the lower end is connected with a screw cover, the upper ends of the membrane threads are sealed with the resin fixing layer on theupper end, and a plurality of air vents penetrating through the resin fixing layer on the upper end are arranged in the resin fixing layer on the upper end; and a water collecting pipe is arranged between the two resin fixing layers. By using the membrane assembly, most of air bubbles can be discharged by the air vents on the upper end of the assembly when the air bubbles generated at the time ofaeration rise to the top of the assembly, thereby the impact of the air bubbles to the membrane threads on the upper end is reduced, and the service life is prolonged. At the same time, the assembly can reduce the pollution of the upper ends of the membrane threads.

Description

technical field [0001] The present invention relates to a water treatment device, more particularly, to a submerged hollow fiber membrane module. Background technique [0002] As one of the wastewater treatment methods, hollow fiber membranes have been more and more widely used in the water treatment industry. Among them, the membrane filter element is immersed in the activated sludge tank, and the activated sludge and treated water are treated by filtration. The membrane separation activated sludge method of solid-liquid separation. Such devices are also known as MBR membrane bioreactors. As the core element of membrane bioreactor - membrane core, curtain or column membrane modules are usually used internationally. In order to avoid the accumulation of sludge on the surface of the hollow fiber membranes and between the hollow fiber membranes, the column membrane module usually adopts the method of aeration at the lower end and water production at the upper end, using the ...

AI Technical Summary

Problems solved by technology

However, during use, since the air bubbles rise to the upper end of the module during aeration, they must pass through the membrane and then be discharged to the surroundings, so the sludge at the upper end cannot be discharged smoothly, and the sludge will inevitably accumulate in the upper membrane after long-term operation, resulting in At the same time, the bubbles rise to the top and are discharged through the membrane filaments. The upper membrane filaments are impacted, which will easily lead to fatigue damage of the membrane filaments and reduce the service life of the components.

Images