Jet self-cleaning type membrane assembly

Abstract

The invention discloses a jet self-cleaning type membrane assembly, belonging to technical field of environment-friendly sewage treatment. The membrane assembly comprises a frame structure, a fixed cleaning system or a movable cleaning system, a lower gate, a vertical gate, an aeration pipe, a circulating system, a membrane material and a water production pipe, wherein the frame structure comprises an inner framework and an outer framework, the membrane material is arranged on the inner framework, and the cleaning system is arranged between the inner framework and the outer framework. The membrane assembly is wide in sewage quality range and strong in emergency treatment capacity, the chemical cleaning is finished in a biochemical tank, and a membrane material does not need to be added, sothat the damage of the membrane material is avoided, and the sludge is not influenced during the chemical cleaning; the lower gate and the vertical gate are closed, clean water is injected into the membrane assembly, and the membrane assembly can be isolated from sewage which is not suitable for being treated, so that the membrane material is protected; and the biochemical tank can be internallymaintained during the pause in north cold regions, so that the serious pollution of the membrane material is avoided.

Description

technical field [0001] The invention relates to a membrane module, which belongs to the technical field of environmental protection sewage treatment, in particular to a jet self-cleaning membrane module used in a membrane bioreactor. Background technique [0002] At present, membrane bioreactor (MBR) technology has been widely used in sewage treatment. Membrane bioreactor is a new type of wastewater treatment system that organically combines membrane separation technology and biological treatment technology. Replace the secondary settling tank at the end of traditional biological treatment technology with membrane modules, maintain a high concentration of activated sludge in the bioreactor, increase the organic load of biological treatment, thereby reducing the footprint of sewage treatment facilities, and reduce the residual by maintaining low sludge load amount of sludge. The activated sludge and macromolecular organic matter in the aerobic biochemical pool are mainly ret...

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Problems solved by technology

[0010] In the north, especially in the three northeastern provinces, Inner Mongolia, Xinjiang and other regions, the temperature in winter is -20 degrees Celsius to -30 degrees Celsius for a long time. Even if the sewage treatment equipment takes insulation measures, it rarely reaches the normal operating temperature. Stop operation in winter, restart operation in late April or early May, or aerate as usual in winter, but because the water temperature is too low, microorganisms cannot grow and reproduce, the sludge in the MBR tank loses activity, the water quality becomes poor, turbid and viscous , mucus and sludge adhere to the surface of the membrane material, seriously contaminate the surface of the membrane material, and even cause calcification on the surface of some membrane materials

[0011] 2. It is easy to cause damage during the process of taking out and putting in the membrane material:

[0012] When the membrane material is seriously polluted, simple cleaning cannot restore the water production capacity of the membrane material, and chemical cleaning is required. During chemical cleaning, the membrane material needs to be taken out of the membrane module frame of the MBR pool, and then put into the water tank for cleaning. In the process of membrane material, stretching, scratching and collision are inevitable, which can easily cause damage to the membrane material

[0013] 3. Membrane materials cannot be isolated from sewage:

[0014] When the operation is stopped in winter and the sewage treatment system is debugged, the water quality is extremely unstable during the sludge cultivation process, and the sludge has a high viscosity, which can easily cause pollution and blockage of the membrane material. Under the above conditions, it is not suitable for the membrane material to contact with sewage. The technical membrane module cannot isolate the membrane material from the sewage

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