I. Introduction As we all know, industry is an important part of national economy, development and industrial development of the national economy is substantially simultaneous; chemical, paper, leather, machinery manufacturing, printing and dyeing, metallurgy, and other enterprises in the development of the outer row of wastewater Environmental pollution caused by a major sewage treatment is imminent event. However, due to long-standing lack of necessary environmental awareness, coupled with lack of investment, China's rapid development of the industry at the same time, causing increasingly serious environmental pollution hazards, especially for water harmful to the environment is staggering. When the people from the path "after pollution" of awakening, to have been caused by pollution governance, mature technology first easy reference is outside the factory management or said discharge port governance that apply in terms of sewage treatment has accumulated technology, convection to the sewage plant outfall of a precipitation purification, degradation of organic matter Biological Aerated two, three physical and chemical treatment in order to maximize to obstruct degrade organic matter and color. How to dispose of the sewage it? In the process of sewage treatment, what equipment to make the water meet the national emission standards or reuse standards, and run economy? In this regard the introduction of foreign advanced technology to develop and produce a CAF water treatment equipment, mainly used for paper, chemicals, printing and dyeing, oil refining and other industrial wastewater and urban sewage purification treatment. Second, conventional flotation methods traditionally two grease traps (gravity settling tank and separation tank) and dissolved air flotation systems are used to remove solid contaminants, but they are in performance and operations there are serious issues. Gravity settling tank sludge concentration and separation tank is low, a large quantity of sludge, sludge treatment require frequent, high processing costs. If not treated, the more heavy sludge tanks more, not only will affect the treatment effect, and in fact, the final effluent leaving the settling ponds will become worse. Dissolved air flotation system has made great progress over the two grease traps. But the whole system is too complicated, the operation is very cumbersome, and high operating costs. It relies on high-pressure pump circulating air dissolved in water to form a dissolved gas and water into the sewage. Although DAF had circulatory system, but in preventing the sludge remaining in the bottom of the grease traps of technology is still quite enough. Better it is filtered out of the solid material with recycled water will eventually return, when the water through a special nozzle clog the nozzle phenomenon will occur frequently and, dissolved air flotation system includes a pressure vessel, compressor and circulation pumps and other equipment, not only power consumption, but also complex systems require manual operation continued guards. Third, the structure CAF CAF equipment mainly flotation equipment cabinet, cavitation aerator, chain scraper system, scum collection and drainage system, the overflow water system, electric control system, dispensing cans, storage bottles of medicine, glass rotameter, return pipe, circular console, dosing pumps. The device can be an integral steel structure housing, but also by our company cabinet drawings, self-built concrete structure after the user from my company technical personnel on-site supervision of installation. Stand-alone treated water is recommended when more than 320m3 / h, the box with reinforced concrete structure.