At present, bubble tube diffuser can be designed in different forms, and two types are commonly used today: one is a common aeration tube sintered from coarse porcelain or corundum. In the sintering process, many tiny pores are produced. Its main feature is that it can generate tiny bubbles. The diameter of the bubbles is about 0.1 to 0.2 mm, the contact area of gas and liquid is large, and the oxygen utilization rate is high, generally reaching 20 to 25%.
The other is called a tubular diaphragm microporous aeration tube, although its installation method is not significantly different, but its own structure is very different. The product is made of ABS or UPVC pipe as a gas pipe. The pipe wall is provided with a venting hole. The outer circumference of the gas pipe is covered with a membrane made of synthetic rubber, and the diaphragm is fixed on the pipe by a metal clip. Uniformly distributed perforations are produced by laser or the like on the synthetic rubber film.
In practical applications, the air mainly enters from the vent hole on the side wall of the aeration tube, and then under the action of air compression, the diaphragm is slightly bulged, and the aperture is opened to achieve the purpose of diffusion of the air. When selecting a rubber diaphragm, it is preferred to use an anti-aging, high-strength gel.