Oxygenation aeration fan

Oxygenation aeration fanThe role of aeration in sewage treatment
The main structures used for biological treatment of wastewater. Activated sludge process is an aerobic biological treatment method. During the treatment process, in order to maintain the life activities of microorganisms, it is necessary to ensure a certain amount of dissolved oxygen in the water. The so-called aeration refers to continuously injecting air into water or using mechanical stirring to dissolve oxygen in the air into the water.
The aeration tank is mainly composed of three parts: the tank body, the aeration system, and the inlet and outlet. The pool body is generally constructed with reinforced concrete, and its planar shapes include rectangular, square, and circular. The main aeration methods are air blowing aeration and mechanical aeration.
The main equipment for aeration of the aeration fan
Blast aeration, also known as compressed air aeration. The main equipment includes Roots blower, centrifugal blower, vortex blower, rotary blower, water ring blower, etc.
3. Precautions for the operation of blower before equipment ventilation inspection
Before the formal water supply, conduct a ventilation test. Before ventilation, start the fan and turn on 50% of the fan's air volume. Send it to the aeration pipeline of the biochemical tank for testing. Check the welding and installation quality of all nodes in the pipeline, and there should be no air leakage. If it is difficult to detect, use soapy water for testing. At this time, special attention should be paid to the operation of the fan. For example, the rotary fan cannot run empty, and the lubricating oil of the fan cannot be automatically circulated when there is no pressure. There is a risk of oil shortage operation of the fan. Therefore, during the leakage test, it is necessary to continuously add an appropriate amount of lubricating oil from the air inlet to make the fan run normally.
Main requirements for aeration fan
1、 The air volume of the blower meets the required oxygenation capacity of the equipment.
2、 The pressure of the blower meets the required boost of the equipment.
3、 The noise of the blower must meet the requirements of the environment.
4、 The blower has a long lifespan and is easy to install and maintain.
Among the widely used fans currently, Roots blowers and centrifugal blowers are relatively good choices in large-scale water treatment projects. They are widely used in large-scale water treatment projects due to their high air volume and high air pressure characteristics. However, rotary blowers are more favored by users in small-scale water treatment projects due to their significant features of high efficiency, energy saving, and low noise. At present, a subwoofer, oil-free, environmentally friendly water ring fan is more recommended.
Comparison of Characteristics of Several Aeration Blowers
Roots blower: gear transmission, oil lubricated gears. Gear transmission, gear noise is an unavoidable source of pollution. In addition, the Roots blower rotates once and exhausts and inhales three times. The pulsating noise from the intake and exhaust is a source of noise pollution for the blower, and the leakage of the gear oil tank can also cause oil pollution.
Rotary blower: Oil lubricated blower, high fuel consumption, oil mist generated at the exhaust port, secondary pollution, lack of oil, will increase wear, produce noise, and damage the blower.
Water ring blower: No mechanical wear, water is the working fluid, no mechanical noise, no oil pollution, can provide clean air source, no water shortage or wind, will not damage the blower. The fan impeller has 16 blades to divide the space into 16 working spaces. Every rotation of the fan, exhaust and suction are 16 times, greatly reducing the pulsating noise of the fan. This type of fan is currently one of the water treatment aeration fans.