Air flotation equipment is a type of water treatment equipment that enters or generates a large number of fine bubbles in water, so that the air is attached to the suspended matter particles in the form of highly dispersed tiny bubbles, causing the density to be less than water, and floating on the surface of the water using the principle of buoyancy to realize solid-liquid separation. The air flotation machine adopts a new type of efficient dissolved gas equipment, a micro bubble generator, to replace the traditional air intake equipment to dissolve gas in the water, and install a number of oblique pipe groups in the air flotation area, including a box, a slag scraper and a screw discharger to form a complete air flotation water purification device. The sewage after the dosing reaction enters the mixing zone of the air flotation, mixes and contacts the released dissolved gas, so that the flocculation adheres to the fine bubbles, and then enters the air flotation zone. The flocculant floats to the surface of the water under the action of air buoyancy to form scum, and then enters the air flotation zone. Features of air flotation machine: 1. Large processing capacity, high efficiency, and small footprint. 2. The process and equipment structure are simple, easy to use and maintain. 3. It can eliminate sludge expansion. 4. The floating SS and sinkable SS can be significantly reduced.