Disc-type aerator

Abstract

The invention relates to a disc-type aerator, which includes, from top to bottom successively, a spiral press cover, a membrane sheet, a flow guide supporting board, and a base. A hole-valve-integrated check valve is disposed between the flow guide supporting board and the base. The membrane sheet includes a first membrane sheet and a second membrane sheet thereon. A plurality of first bar-shaped micro-pores is formed in the first membrane sheet and a plurality of second bar-shaped micro-pores is formed in the second membrane sheet. The first bar-shaped micro-pores and the second bar-shaped micro-pores are disposed in an up-and-down correspondingly staggered manner with central points of all the micro-pores in the same line. An inverted saddle-shaped wedge board is disposed under the base. The disc-type aerator is simple in structure, is convenient to assemble or disassemble, is not liable to block, is good in sealing, can effectively prevent backflow of water, is large in effective aeration area, is significantly improved in anti-fatigue strength, reduces aeration resistance and is prolonged in service life.

Description

technical field [0001] The invention relates to an aerator, in particular to a disc aerator, in particular to a disc aerator with double-layer diaphragms. Background technique [0002] The aerator is an essential equipment for aeration and oxygenation of water supply and drainage. It is one of the essential equipment for urban sewage treatment plants, and is directly related to the treatment efficiency and operation status of sewage treatment plants. According to the method of use, it can be divided into surface aerators and underwater aerators. At present, most urban sewage treatment plants in my country use disc aerators in underwater aerators for biochemical aeration and oxygenation. With the rapid construction of sewage treatment plants, the market demand for disc aerators is also increasing. The diameter of the aeration bubbles of this device is small, the diameter of the gas-liquid interface is small, the area of ​​the gas-liquid interface is large, the bubbles diffuse ...

AI Technical Summary

Problems solved by technology

[0003] The traditional disc aerator uses a layer of diaphragm and the thickness of the diaphragm is relatively thin. At the place where the upper cover is pressed, because the upper cover generates a large shear force on the diaphragm, it is easy to cause the membrane at this place to The diaphragm is easily torn and damaged; in addition, during the operation of the aerator, the diaphragm has been in a state of shaking up and down, causing the diaphragm to form a continuous swing with the pressing boundary as the fulcrum, and it will be torn due to exceeding its fatigue strength after long-term operation Damage, after the membrane is damaged, the sewage treatment plant will stop the operation of the aeration tank and remove the sewage in order to replace the aerator or the membrane, which will directly lead to the reduction of the sewage treatment capacity of the sewage treatment plant, and at the same time increase the maintenance workload and economic losses

In addition, the shape of the opening on the diaphragm of the traditional disc aerator is generally in the shape of a "one", that is, a single linear opening. When the gas passes through the opening of the "one", it needs to overcome the large elastic force of the diaphragm. Stretching the opening of the word "一" will naturally increase the loss of gas resistance; and the deformation force of the diaphragm is relatively large, which may easily cause the diaphragm to be torn at both ends of the opening of the word "one" and be damaged, which accelerates the diaphragm's deformation. The speed of damage shortens the service life and affects the efficiency of the entire sewage treatment

Images