The Working Principle of Air Flotation Machine

Air float is a kind of equipment widely used in industrial wastewater treatment, it uses the adhesion between the bubble and the suspended matter, so that the suspended matter floats to the surface, so as to achieve solid-liquid separation. The application of air float is of great significance to improve the efficiency of wastewater treatment and reduce environmental pollution. Many of the company's products use the working principle of the air float, such as dissolved air floatation machine(flat-flow type), dissolved air floatation machine(radical-flow type), nikuni pump air flotation machine, horizontal flow type air flotation and sedimentation machine, cavitation-air flotation machine and other equipment are used in the principle of air float, a wide range of applications. Let's take a look at the working principle of the air float together!

The working principle of the air float can be summarized into 4 processes.

1. Add drug flocculation, the raw water is pumped from the regulating tank to the water inlet of the air float through the lifting pump, and the coagulant and coagulant aid are added.

2. Gas release, flocculated sewage, after full reaction, the dissolved gas system releases dissolved gas vesicles, floc attachment, floating.

3. Solid-liquid separation, in the slag scraping area, floating floc group, is scraped away by the scraper, water from the overflow mouth.

4. The sludge and the floc scraped out are put into the sludge thickening tank for pressing.The specific process is as follows: First, the raw water is lifted to the air float through the lifting pump in the regulating tank. After passing through the coagulation zone, some coagulants are often added to the coagulation zone, such as aluminum salt and iron salt, common polyaluminum chloride, polyferric sulfate, etc., after mixing, it enters the flocculation zone; The coagulant aid polyacrylamide is added to the flocculating area, and then mixed into the mixing area. The container system starts to release microbubbles through the release device, and the reaction alum will adhere to the microbubbles and float upward with the bubbles. The floating scum will enter the reaction zone and reach the scraping zone. Through the scraping plate action of the slag scraper, the scum above is scraped to the collection area, while the water is discharged through the pipeline, and the bottom sediment and scum are sent to the sludge thickening tank through the pipeline for sludge dehydration.

Since the 1980s, air float water purification technology in china began to get rapid development, in addition to chemical plant wastewater treatment, air float is also widely used in papermaking , printing and dyeing, oil refining, food,starch, oil and other industries of wastewater treatment, and achieved good environmental and economic benefits.

In short, as an efficient and practical wastewater treatment equipment, the air float will still play an important role in the future wastewater treatment field. Through continuous research and innovation, we are confident that the air float will develop into a more advanced and environmentally friendly wastewater treatment technology, and make greater contributions to protecting the environment and promoting sustainable development.