The principle of coal gas phase drying is to use kerosene, which has a higher vaporization point than water, as a medium to remove water from the material to be dried, thereby achieving the purpose of drying the material.
The main components of the coal oil vapor drying equipment include: kerosene vapor generation system, kerosene vapor condensation system, kerosene condensate recovery system, vacuum pump set, transformer oil tank, and automatic control system.
During the actual drying process, many problems such as poor thermal conductivity of the vacuum tank were found. Now, certain improvements have been made to the coal gas phase drying equipment to meet the needs of actual production.
With the rapid development of China's power industry, the use of high-voltage transformers has become increasingly widespread, and the demand for them is also growing day by day. Transformer manufacturers are also constantly adjusting their product structures, with voltage levels gradually increasing from the initial 10kV to 220kV. As an essential equipment for drying high-voltage transformers, the demand for coal gas phase drying equipment has also been increasing continuously in recent years.
Compared with traditional drying equipment, gas-phase drying equipment has many advantages, such as: uniform heating of transformers, fast heating speed, cleaning of transformer bodies, and good drying effect, etc. However, in the actual drying process, there are still many deficiencies in the coal gas phase drying equipment, which need to be improved to a certain extent.