AD-Air Drying System

Application

Air drying system (Model AD) applies for dry air supply on maintenance work of transformers, reactors and other large electrical equipment. Provide dry air to ensure that the internal insulation of electrical equipment will not be damp, and maintenance personnel working within the device will not suffocate from lack of oxygen. The system is much safer, more reliable, more economical and more convenient than nitrogen system. By using AD, the maintaining work is not influenced by climate change. Especially for the overnight operation, just seal around the flange, fill dry air 0.02~0.03MPa, while the transformers and reactors won’t damp without oiling. Reducing the daily pumping and oiling work, to shorten the repair period and improve the quality of maintenance. Inflating the dry air to the fuel injection device and oil inflate in the purify process, can improve insulation and reduce water when it is in rainy and humid environment. AD can also used as indoor air condition when it is left unused.

Principal

AD is equipped with air blower, refrigeration apparatus, air drying filter etc. After blowing in refrigeration apparatus, most of moisture in the air is condensed into ice water. The system conducts the first air drying. Then, the air enters into silica gel tank for the second air drying. The remaining moisture can be adsorbed. The dried air will be purified by passing filter.

When moisture saturated, the blue silica gel CoCl₂ will turn to red. At this time, it needs to change to dried blue silica gel to ensure the drying status.