AFSF circular dissolved air flotation machine

1、 Structure and principle

The AFSF series super dissolved air flotation sewage treatment machine is a steel structure, and its working principle is that the air sent to the air tank by the air compressor is brought into the dissolved air tank through the jet device, and is forcibly dissolved in water at a pressure of 0.35 Mpa, forming dissolved air water, which is sent to the air flotation tank. In the case of sudden release, air dissolved in water precipitates, forming a large number of microbubbles that fully contact the suspended solids in the sewage that is being flocculated after being pumped in and treated with chemicals. During the slow rise process, they adsorb onto the flocculated suspended solids, causing their density to decrease and float to the surface, achieving the removal of SS and COD_crThe purpose.

The structure of the dissolved air flotation sewage treatment machine mainly consists of the following parts:

1. Air flotation tank:

The circular steel structure is the main body and core of the sewage treatment plant, consisting of a release device, a distributor, sewage pipes, outlet pipes, sludge tanks, scraper systems, etc. The release device is placed in the central position of the air flotation machine and is a key component for producing microbubbles. The solution gas and water from the dissolved gas tank are fully mixed with the wastewater here, and suddenly released, generating violent agitation and eddies, forming microbubbles with a diameter of about 20-80um. The flocculants adhering to the water rise, and the clean water is completely separated. The homogenizer has a conical structure and is connected to the release device. Its main function is to evenly distribute the separated clean water and sludge in the tank. The water outlet pipes are evenly distributed at the lower part of the tank and connected to the upper part of the tank through an upright main pipe for overflow. The overflow outlet is equipped with a water level adjustment handle for easy adjustment of the water level inside the tank. The sludge pipe is installed at the bottom of the tank to discharge the sediment deposited at the bottom of the tank. The upper part of the tank is equipped with a sludge tank, and there is a scraper on the tank. The scraper rotates continuously to scrape the floating sludge into the sludge tank and flows automatically into the sludge tank.

2. Dissolved gas system:

The dissolved air system mainly consists of a dissolved air tank, a gas storage tank, an air compressor, and a high-pressure pump. The dissolved air tank is the most critical part of the system, which is used to achieve full contact with air and accelerate air dissolution. It is a sealed pressure resistant steel tank designed with baffles and separators inside, which can accelerate the diffusion and mass transfer process of air and water, and improve the efficiency of gas dissolution.

3. Medication tank: