Introduce：Kerosene vapor phase drying equipment is currently used in transformer industry transformer or coil drying of an advanced special equipment. It is compared with the traditional drying technology and equipment, this equipment has the characteristics of complicated structure and process parameters. The built-in desiccant vapor drying equipment and external desiccant vapor drying equipment compared. More safety, desiccant steam utilization is high, the structure is relatively simple. The use of 31500KVA/100 and above applies to products.