Microporous aerator for sewage treatment

Abstract

The invention discloses a microporous aerator for sewage treatment, which comprises an aerator membrane, a rectifying gas distribution plate and a support base, wherein the rectifying gas distribution plate is fixed to the support base, and a closed chamber is formed between the rectifying gas distribution plate and support base; the aerator membrane is attached to the outer wall of the rectifying gas distribution plate; the aerator membrane is provided with a plurality of aeration pores; the rectifying gas distribution plate is provided with a plurality of gas flow channels which are communicated with the closed chamber and the aeration pores; and the bottom of the support base is provided with a gas inlet. The rectifying gas distribution plate is a micro-arch which bulges to the aeration direction; and in the aeration direction, the projection plane of the rectifying gas distribution plate is rectangular. The aerator membrane is made from polyurethane. Every two adjacent rows of the aeration pores in the aerator membrane are arranged in a staggered mode. The microporous aerator has the advantages of large and uniform effective aeration area, high oxygenation capacity, high oxygen utilization ratio, stable structure and favorable material performance, and is simple for installation and maintenance.

Description

technical field [0001] The invention relates to a microporous aerator for sewage treatment, which belongs to the field of sewage treatment. Background technique [0002] 45-75% of the energy consumption of sewage treatment plants is used for aeration, and the operation and maintenance costs are high. Therefore, improving the oxygenation performance and structural stability of the aerator is not only conducive to energy saving and consumption reduction, but also ensures the stable operation of the entire aeration system. Therefore, it is necessary to optimize and even innovate the structure and function of the microporous aerator. [0003] The microporous aerator is the core equipment for blast aeration and oxygenation in sewage treatment. At present, the shapes of microporous aerators widely used in sewage treatment plants are generally tube type, disc type, and plate type; the materials are mainly ceramics, plastics, and EPDM; no material is polyurethane rubber. , A micr...

AI Technical Summary

Problems solved by technology

However, the current tubular and disc microporous aerators have a low air outlet area and some aeration area is wasted. Pressure differences are likely to occur during operation, resulting in uneven air distribution and low oxygen transfer efficiency.

The resistance loss of the plate microporous aerator is relatively large, and the gas-liquid stirring ability is poor

Corundum ceramic material is fragile, easy to block, and difficult to clean

EPDM rubber has poor anti-biological pollution and oil resistance, and is easy to tear under high pressure and high air flow operation

The physical and chemical properties of the existing rubber membrane microporous aerators are low, and they have not been optimized and modified according to different processes and working conditions, and the manufacturing process is relatively rough, resulting in aerator stability, uniformity of air distribution, pore size and pore spacing. poor uniformity

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