1、 Overview of Nichni pump type air flotation machine

The CXNF series Nicolny pump air flotation machine is specifically designed to remove oil, gum, and suspended solids from industrial and domestic wastewater. Using this machine for different types of wastewater, the oil removal rate is over 95%, and most suspended solids are removed. After adding appropriate chemical agents and mixtures, the COD and BOD of the COD machine can be removed by more than 60% in this pretreatment stage. The equipment has low operating costs, high work efficiency, simple operation and maintenance, and has significant improvements compared to traditional dissolved air flotation.

2、 Working principle of Nicolney pump type air flotation machine

The inflation section of the equipment is completed by a Nicolani pump, and the treated clean water flows back to the Nicolani pump, where it is mixed with air and water before entering the air flotation tank. Untreated sewage enters the air flotation tank, where it is thoroughly mixed with the dissolved reflux water during the rising process and enters the air flotation section.

Due to the imbalance between the air-water mixture and the liquid, a vertical upward buoyancy is generated, bringing the solid suspension to the water surface. During the upward movement, microbubbles attach to the suspension, and upon reaching the water surface, the solid suspension is supported and maintained on the water surface by these bubbles, and is removed by the radial airflow thrust.

The suspended solids floating on the water surface are continuously removed by the scraper, which moves along the entire liquid surface and pushes the suspended solids from the inlet end to the outlet end of the air flotation tank. The scraper of the scraper is fixed at both ends of the chain. The scraper is driven by a motor driven transmission device. The scraper moves along the entire width of the groove, scraping pollutants onto the inclined metal plate, and then pushing them into the floating slag discharge pipe for discharge. The purified sewage is discharged through the overflow pipe. The overflow channel is used to control the water level in the air flotation tank to ensure that the liquid in the tank does not flow into the scum discharge pipeline.