Back-washable flat membrane element

Abstract

The invention discloses a back-washable flat membrane element, belonging to the field of flat membrane element, which is characterized in that the flat membrane element is formed by superposing a first backwashing protecting screen, a first flat membrane, a first stream guidance screen, a backing plate, a second stream guidance screen, a second flat membrane and a second backwashing protecting screen in sequence, namely a back-washable flat membrane main body is formed after superposition, and the periphery of the main body is sealed by a U-shaped seal groove, wherein, the upper and lower sides of the U-shaped seal groove are respectively provided with a stream guidance groove, an opening and a fixed ring. The back-washable flat membrane element of the invention has convenient operation and simple structure, realizes on-line cleaning, leads a membrane bioreactor to operate continuously, and is especially suitable for water processing fields, such as life, chemical engineering, biological engineering and environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of research and development and application of membrane separation technology. Specifically, the invention relates to a new type of flat membrane element that can be used in water treatment fields such as life, chemical industry, biological engineering, and environmental protection. Background technique [0002] Membrane Bioreactor (MBR) is a high-efficiency sewage treatment technology that combines high-efficiency membrane separation technology with traditional activated sludge water treatment methods. It replaces the secondary settling tank in the traditional sludge process. Compared with the traditional biological sewage treatment technology, it has the characteristics of high biochemical efficiency, stable effluent quality, small footprint, long sludge discharge period, modular structure makes the equipment more compact, easy automatic control and operation management, and has many advantages. The obvio...

AI Technical Summary

Problems solved by technology

After the membrane bioreactor made of the above-mentioned membrane elements has been operated for a period of time, a lot of dirt will adhere to the flat membrane layer of the flat membrane element and the outer surface of the flat membrane, resulting in fouling, which will increase the filtration resistance and cause the membrane bioreaction The water production of the device is greatly reduced

The above-mentioned flat membrane elements cannot be backwashed, the reason is that if backwashing is performed: the clean water is poured into the flat membrane elements from the inlet and outlet, due to the pressure, the flat membrane layer will burst and damage the flat membrane elements

Images