working principle：

1. Air flotation process:

After the chemical addition reaction, the sewage enters the mixing zone of the air flotation tank and is fully mixed and contacted with the released dissolved air water. Make the flocs in the water fully absorb and adhere to tiny bubbles, and then enter the air flotation zone. Under the buoyancy of bubbles, flocs float towards the water surface to form a floating layer. The clear water from the lower layer is collected through the water collection pipe and sent to the clear water tank for use as reflux dissolved air water. The remaining clear water is discharged through the overflow outlet. After the floating debris on the water surface accumulates to a certain thickness, it is scraped into the mud tank of the air flotation tank by a scraper and discharged through a valve.

2. Generation and discharge of dissolved air water:

Clear water is pressurized by a water pump and enters the dissolved air tank through a control valve. Air and water are dissolved, separated, and circulated in the dissolved air tank. The fully dissolved water is then released into the mixing zone of the air flotation tank through a JT type release valve. The air in the dissolved gas tank continues to enter the water, and the air will continuously decrease. At this time, the automatic control part can control the air compressor to supply gas in a quantitative manner, ensuring sufficient gas supply.

3. Blocked discharge of release device:

When the release device is blocked, large bubbles will be generated in the air flotation tank. At this point, the vacuum valve can be opened to activate the water injector: vacuuming opens the release tongue, allowing the water flow to flush out the blockage, and then the vacuum valve is closed. The valve usually only takes 10-20 seconds to open.

5Scope of application：

Air flotation, as a water treatment process, is widely used in sewage treatment and water purification engineering. This device is suitable for:
1. Recycling of papermaking white water pulp and reuse of clean water.
2. Removal of various heavy metal ions.
3. Separation of refinery wastewater and oil pollution.
4. Removal of impurities from tannery wastewater.
5. Removal of chromaticity and impurities from printing and dyeing wastewater.
6. Various biological treatments, biofilms for solid-liquid separation