Now, it has entered the "14th five year plan" for renewable energy development, and photovoltaic power generation industry is still a key development sector. In the 13th Five Year Plan period, the photovoltaic power generation industry in China has been breaking through the ceiling of the industry, improving the industrial chain, innovating new technologies and contributing to the poverty alleviation industry in China. At the same time, it also plays an important role in the world.

Solar photovoltaic system is a new generation system which uses the photovoltaic effect of solar cell semiconductor materials to convert solar radiation energy directly into electric energy. It is a technology that uses the photovoltaic effect of semiconductor interface to convert light energy directly into electric energy. The key element of this technology is solar cells. After series, solar cells can be packaged and protected to form large area solar cell components, and then photovoltaic power generation devices are formed by combining with power controller and other components.

At present, the domestic solar photovoltaic industry mainly produces polycrystalline silicon purification, single crystal pulling, polysilicon ingot, solar cell sheet, etc. the main power demand in these production processes includes: ultra pure water, power supply and special gas. Ultra pure water is usually used in 20% of the manufacturing process of an electronic product. More than 50% of the fluids used in wet process equipment are ultra pure water. With the improvement of environmental protection requirements, this proportion is still increasing. It can be seen that the necessity of ultra pure water equipment in the solar photovoltaic industry.

The super pure water equipment is usually composed of quartz sand filter, activated carbon filter, sodium ion softener and precision filter, etc., which are composed of pretreatment system, RO ro ro ro main machine system, ion exchange mixed bed system, EDI electric desalination system, etc. After years of practice, the ultra pure water is prepared by the technology of reverse osmosis and EDI. The ultra pure water equipment has good application value, can realize automatic control, and can effectively meet the electronic water quality standard in China to some extent, and has the advantages of high automation, easy to realize automatic control and stable water quality.