Kerosene gas-phase drying equipment improves the production efficiency. The time of treating products with gas-phase drying technology is more than 1p3 shorter than that with hot air circulation technology. Although the transformer body needs to be dried, the time is very short. In this way, the time of using gas-phase drying technology to treat the transformer is half shorter than that of using hot air circulation to treat the transformer. The heating efficiency is improved. The heat source of hot air circulation comes from the row heating of the tank body, and the heat is transferred through radiation. The cross flow oven, especially the heating of finished products, needs to heat the heater body through the oil tank and porcelain sleeve. Especially in the heating process, there is a temperature difference between the inner and outer insulation, resulting in low heat transfer efficiency and high energy consumption. The gas-phase drying technology is used to treat the transformer, that is, kerosene vapor is introduced into the interior of the assembled product to heat the body of the product, which can condense and release heat directly on the surface of the insulating material. Because kerosene can easily penetrate into the insulation, the heating speed is fast and the fume purifier is uniform, which improves the heating efficiency and reduces the loss of energy.

Kerosene gas phase drying equipment is mostly used in transformer manufacturers.

The internal insulation medium of oil immersed power transformer is generally paperboard for isolation. These paperboards contain a small amount of water. Before the transformer is put into operation, the internal insulation materials must be vacuum treated to avoid the discharge phenomenon of these water molecules under the action of high electric field strength and internal insulation damage. If the vacuum drying is not sufficient, the aging process of insulating materials will become faster in the normal operation of the transformer, causing potential safety hazards and greatly shortening the service life of the transformer. Therefore, for the vacuum drying of large capacity transformer, the gas-phase drying method has been widely used.

The moisture in the insulating material inside the transformer generally adsorbs the inside of the insulating material. In the process of drying, the water is generally changed from liquid to gaseous by heating, and then discharged through the internal and external pressure difference generated by high vacuum. The higher the temperature applied under the same vacuum conditions, the faster the drying speed of the transformer.

The transformer is vacuumized by vacuum pumping machine to reduce the internal pressure below 700pa. At the same time, the vacuum tank body is heated and insulated, and the kerosene evaporator preheat the kerosene to increase the temperature of kerosene steam outlet from 98 ° C to 130 ° C. the kerosene for drying changes from liquid state to steam state and diffuses in the vacuum metal tank.