Purification engineering is a very wide range of applications in the industry, at present (twenty-first Century) in electronic information, semiconductor, optoelectronics, precision manufacturing, pharmaceutical and health, biological engineering, aerospace, automotive spray and many other industries are applied, and according to the industry's precision and clean requirements, the level difference is also large. At present the highest level is the aerospace aviation aviation warehouse, basically belong to the 1 level, belonging to the special field, the area is relatively small. Purification plant in addition to the higher level requirements of the biochemical laboratory and high precision nano material production workshop, the development of the Internet of things will be a major direction of future demand. With the development of electronic components to the micro direction, the LCD panel has been upgraded to the eighth generation, the industry is very huge demand.