Aeration pipe and self-cleaning method

Abstract

The invention relates to the field of sewage treatment, and especially relates to an aeration pipe and a self-cleaning method. The aeration pipe comprises an outer membrane (102) and an aeration inner pipe (103); the outer membrane (102) is made of an elastic material, and a plurality of flow guide ports (101) are formed in the outer membrane (102); one end of the aeration inner pipe (103) is sealed, and the other end of the aeration inner pipe (103) is connected with an air supply pipeline of an aeration system; a plurality of aeration inner pipe side holes (104) are formed in the aeration inner pipe (103); and the outer membrane (102) sleeves the outer side of the aeration inner pipe (103). When large bubbles flow out of the side holes (104) of the aeration inner pipe and then are discharged through a flow guide port on the outer membrane (102), the pressure at the flow guide port is reduced, the outer membrane retracts by virtue of elasticity, and the gas is blocked again, reduced or interrupted; meanwhile, under the conveying action of a fan, the outer membrane of the flow guide port is opened again by the pressure of the air, a large amount of bubbles flow out, and continuous oscillation turbulence is formed.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an aeration pipe and a self-cleaning method. Background technique [0002] From a technical point of view, at present, the bottom aeration inner pipeline is mainly used in the MBR membrane project, and the aeration is realized by using the aeration holes arranged on the aeration inner pipeline. The aeration system usually needs to run continuously and must not stop working. Once the fan is stopped for some reason, the hot air will be held in the inner tube of the aeration. Over time, the sludge at the aeration orifice will be heated and dried and the hole will be blocked. mouth, and then lead to poor aeration or uneven bubbles and other phenomena. In the MBR system, the membrane scrubbing aeration generally adopts the perforated aeration method with large bubbles. When the system is resting or performing chemical cleaning, the aeration is usually stopped, so it is easier to block...

AI Technical Summary

Problems solved by technology

The aeration system usually needs to run continuously and must not stop working. Once the fan is stopped for some reason, the hot air will be held in the inner tube of the aeration. Over time, the sludge at the aeration orifice will be heated and dried and the hole will be blocked. mouth, and thus lead to poor aeration or uneven bubbles, etc.

In the MBR system, the membrane scrubbing aeration generally adopts the perforated aeration method of large bubbles. When the system is resting or performing chemical cleaning, the aeration is usually stopped, so it is easier to block the aeration holes.

In the actual engineering application of membrane bioreactors, ordinary perforated aeration methods often cause poor aeration due to orifice blockage, which causes membrane fouling and ultimately affects the operating environment of the entire process system.

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