Introduction of fine bubble membrane diffuser
Oct 12, 2018

Fine bubble membrane diffuser is also called micro bubble membrane diffuser. Porous materials such as ceramsite and coarse porcelain are mixed with suitable adhesive such as phenolic resin. It is sintered into diffusion plate, diffusion tube and diffusion cover at high temperature. According to the type of installation, it can be divided into lifting microporous aerator and fixed microporous aerator.

The lifting Fine bubble membrane diffuser is mainly composed of microporous aeration pipe, movable rocker arm and hoist. The microporous aeration pipe is composed of microporous pipe, front cover, back cover and connecting bolt. The movable rocker arm is liftable distribution pipe. The microporous aeration pipe is installed on the bronchi, and forms a grid shape. The base is fixed on the wall of the pool and is movable. The pipe is inserted into the pool, the branch pipe is located at the bottom of the pool, and the bracket is supported at the bottom of the pool; 3. The aerator hoist is a movable electric hoist, and the lifting trolley can be moved at will to lift the rocker arm.

Its working principle is: air enters the aeration pipe from the air vent of the back cover of the micro-bubble aeration pipe, and there are many tiny pores on the wall of the aeration pipe. Under the action of the pressure difference, the air in the pipe diffuses out of the pores of the pipe wall, forms many tiny bubbles in the sewage, and causes the turbulence of the water, thus achieving the goal. The purpose of dissolving the oxygen in the air into the water.

There are many forms of micro-porous aeration pipe. At present, there are two kinds of common aeration pipe: one is a common one made of coarse porcelain or corundum. This kind of pipe wall produces many tiny pores in the process of sintering. Its main characteristic is that it can produce tiny bubbles, the diameter of bubbles is about 0.1-0.2 mm, and the contact area between gas and liquid is large. Oxygen utilization rate is high, generally up to 20-25%; its shortcomings are large pressure loss, easy to plug, the air into the filter treatment, easy to damage, once damaged, oxygen utilization rate began to decline rapidly. The other is tubular membrane microporous aeration pipe. This kind of aeration pipe is basically the same as the former, but its own structure is very different. It is made of a pipe made of ABS or UPVC as a cloth pipe, with a ventilation hole on the wall, the cloth pipe is covered with synthetic rubber diaphragm, the diaphragm is fixed on the pipe by metal clips. Uniform distribution of holes was made on synthetic rubber diaphragm by laser and other methods. During aeration, air enters between the diaphragm and the tube wall through the ventilation holes on the tube wall. Under the action of compressed air, the diaphragm bulges slightly and the holes open to achieve the purpose of gas distribution and diffusion. When the air supply is stopped and the pressure disappears, the diaphragm itself closes the hole automatically under the action of elasticity. Because of the action of water pressure, the diaphragm is pressed on the pipe wall. Therefore, the sewage will not backflow and plug the hole. However, the diaphragm hole diameter directly affects the utilization of oxygen, therefore, the hole diameter should be appropriate. Oxygen utilization rate is low when the hole diameter is too large, the hole diameter is too small, and the oxygen utilization rate is high, but the resistance increases. Rubber diaphragm should be anti-aging, high-strength colloid, to avoid tearing diaphragm, causing damage to the aerator.


More inquiries can be contacted from:

KHN water treatment equipments Co., Ltd.




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