Jet flotation treatment technology is a new sewage treatment technology that has emerged in recent years. It uses coal slurry water as the injection fluid, and the fluid forms a negative pressure in the suction chamber of the injector to suck in the gas. When the carried gas passes through the mixing section of the ejector, it is sheared into tiny bubbles. The bubbles adhere to the coal particles during the rise of the air flotation chamber and rise to the liquid surface. They are scraped out by the oil skimmer to achieve the purpose of sorting.