【Overview】
In the chemical industry、 petroleum industry、 metallurgy industry、 oil refineries、thermal power generation and construction of the central air-conditioning systems often need to process medium heat for cooling，water features are suitable for use as cooling medium。Industrial cooling water through the heat exchanger (or heat exchanger、water coolers、water coolers) and the indirect media converter technology。.The process medium hot heat exchange process in the lower temperature, the cooling water is heated and the temperature increased。
Basic cooling water system can be divided into direct current water system and circulating water systems。
In the DC water system，cooling water only through a heat exchanger to be drained away after use，so the DC is also known as a use of water of water，causing serious waste of water，and water pollution to the environment。
Industrial cooling water consumption are often large，many enterprises in the chemical industry accounted for 90% of total industrial water -95%，and so to be recycled，which means recycled water system。

【Application environment】

In the air-conditioning, industrial circulating water system for more than 90% of open recirculating cooling water systems，cooling water circulation system in the continuous cycle of use，due to rising water temperatures, flow rate changes, evaporation, various inorganic ions and organic matter concentration，cooling And cooling towers in the outdoor pool by the sun radiation, wind and rain, dust and debris to enter，and the device structure and the role of materials and other factors，resulting in a wide range of integration issues。

【Three common problems and hazards】

【Scale attached】

In the circulating cooling water system, the concentration of bicarbonate increases with the evaporation。When the concentration of supersaturated，or through the heat transfer surface temperature rises，the carbonate will be decomposed in the heat transfer surface to form a dense micro-scale soluble salts, and its thermal conductivity is poor (≤ 1.16W / (mK ), Steel is generally 45W / (mK)). Therefore, the scale adhesion， ranging from reducing heat transfer efficiency, serious, the heat exchanger block, the system resistance increases, less efficient water pumps and cooling towers, energy consumption increased，production decreased to accelerate localized corrosion，or even result in non-Normal production。