Air flotation device

The utility model discloses an air flotation device, belonging to the field of water treatment devices. The air flotation device comprises a micro/nanometer bubble generation device, a micro/nanometer bubble generator, a gas control valve and an air flotation pond, wherein the micro/nanometer bubble generation device is provided with a water inlet pipe, an intake pipe and a water outlet pipe, the water inlet pipe is used for introducing the water, the intake pipe is connected with the gas control valve, the gas control valve is provided with an opening connected with an air source, the water outlet pipe is connected with the micro/nanometer bubble generator; the micro/nanometer bubble generator is provided with a water outlet, and the micro/nanometer bubble generator is arranged in the air flotation pond. The air flotation device is a pressurization dissolved gas type air flotation device, through the tiny bubble water generated by the micro/nanometer bubble generator, the dissolved gas efficiency is improved, and meanwhile, the generated tiny bubble has negative charge so as to have good absorption action on oil stain and particles, the air flotation effect is greatly improved, the whole device has no need to increase the additional operation cost, and in comparison with the conventional air flotation method, the air flotation device is revolutionary improvement.