What are the components of the blast aeration system? what is the function?

The blast aeration system is a deep oxygenation system, and the aeration system consists of a blower, an air purifier, an air delivery pipe, and a diffuser (ie, an aeration head or an aerator) immersed in the mixed liquid.

The air volume provided by the blower should meet the oxygen demand of the biochemical reaction and the requirement to keep the suspended solids in suspension. In addition to the net water pressure, the diffusion loss of the diffuser and the diffuser and the diffuser should be satisfied. Required export pressure. Centrifugal blowers and Roots blowers are commonly used in blowers. Small and medium-sized sewage treatment plants generally use Roots blowers, but the disadvantage is that the noise is too large, and noise reduction or sound insulation measures must be taken. Centrifugal blowers can be used for large-scale sewage treatment. The advantages of centrifugal blowers are less noise and higher efficiency.

The function of the air purifier is to filter the suspended particulate matter in the intake air, prevent the diffuser from being blocked by impurities, and improve the operating state of the entire aeration system.

The air delivery pipe is the passage from the fan outlet to the aerator, which functions as a conveying and gas distribution. Generally, the upper part of the liquid level of the aeration tank is welded steel pipe, and the lower part of the liquid surface is made of PVC or ABS pipe. The air duct of the aeration tank should be connected into a ring network to increase flexibility and improve the air distribution effect. When the air duct is connected to the aeration tank, the top of the pipe should be at least 0.5m above the water surface to avoid backwater. The air flow rate in the air duct is generally 10~15m/s for dry and branch pipes, 4~5m/s for rigid pipes and small branch pipes, and the flow rate should not be too high to avoid noise.

The aeration head aerator is a key part of the entire blast aeration system. Its function is to disperse the compressed air provided by the blower into as small air bubbles as possible to increase the air and mixture skill interface. It promotes the mass transfer process in the air which is dissolved into the water. The air diffuses and sets the four gas passages. The main groups are the German gas pool, the middle gas pool, the atmospheric application, and the water for shearing permanent impact.