In many industrial fields, the performance, lifespan and safety of products often depend on a seemingly simple yet crucial step - drying. Whether it is the insulating cardboard of a giant power transformer or the windings of a precision motor, even if they contain a trace amount of moisture, it may lead to a decline in insulation performance, efficiency attenuation, and even cause expensive equipment failure. Traditional methods such as hot air drying often struggle to completely remove the deep moisture from materials. At this point, an efficient, thorough and reliable drying technology - coal gas phase drying equipment - has become the core choice in the high-end manufacturing processes of many industries.
What is coal gas phase drying technology?
Vapor Phase Drying (VPD) is an advanced drying process that uses kerosene vapor as the heat transfer medium. The core principle lies in:
High-efficiency heat transfer: In a vacuum environment, a special kerosene medium is heated and evaporated to form high-temperature steam. These vapors condense on the surface of the workpiece, releasing a huge latent heat of vaporization. The heat is directly and evenly transferred to the workpiece, and the heating efficiency far exceeds that of traditional methods.
Deep dehydration: As the workpiece is rapidly heated, the internal moisture is fully evaporated. The vacuum system continuously extracts this water vapor, disrupts the vapor-liquid equilibrium, and prompts deep water to constantly escape until the extremely low water content requirement is reached.
This "inside-out" heating combined with "outside-in" dehumidification ensures a deep, uniform and efficient drying effect.
The wide application fields of coal gas phase drying equipment
1. Power industry and manufacturing of power transmission and transformation equipment
This is the most classic and crucial application field of coal gas phase drying equipment.
Power transformers: The insulating paper and cardboard inside large transformers contain a large amount of moisture. VPD technology can reduce their moisture content to below 1%, greatly enhancing the insulation strength, electrical performance and service life of the transformers, which is the cornerstone for ensuring the safe operation of the power grid.
Reactors and transformers: As core power transmission and transformation equipment, the thorough drying of their internal insulation is crucial for preventing partial discharge and insulation breakdown.
2. Motor and generator industry
From wind turbines to large industrial motors, the insulation treatment of their windings directly determines the reliability and energy efficiency of the motors.
Large generators: Before impregnating with insulating varnish, the stator windings are pre-treated through VPD equipment to ensure that the varnish can fully penetrate and form a gap-free insulation system.
High-voltage motors and explosion-proof motors: Thoroughly dried windings can effectively resist corona corrosion and erosion from humid environments, ensuring the stable operation of the motor under harsh working conditions.
3. Papermaking and fiber industry
Drying of paper-based and fiber products: For special paper, insulating cardboard and other materials that require extremely high drying uniformity and final moisture content, VPD technology can achieve rapid and deep drying without damaging the fiber structure, thereby enhancing product quality.
4. Research and special materials fields
Pre-treatment of composite materials: Some carbon fiber or glass fiber composite materials need to undergo strict drying treatment before being impregnated with resin to remove moisture and volatile substances from the fibers and ensure the performance of the final composite products.
Cultural relic restoration and wood processing: For large wooden components or precious cultural relics, VPD technology can gently remove moisture in a low-temperature and oxygen-free environment, effectively preventing cracking and deformation. It is a precise maintenance technology.
What will you gain by choosing our coal gas phase drying equipment?
In an increasingly competitive market, having leading manufacturing processes means having core competitiveness. Our coal gas phase drying equipment is not merely about completing a process; it also provides a reliable guarantee for the outstanding performance of your products.
Outstanding drying effect: Deep dehumidification, moisture content far below international standards, significantly enhancing the electrical performance and mechanical strength of the product.
Extremely high energy efficiency: Utilizing latent heat transfer, it features high thermal efficiency, significantly shortening the drying cycle and saving you precious production time and energy costs.
Outstanding process protection: Vacuum low-temperature environment prevents material oxidation and causes no damage to the workpiece structure. It is particularly suitable for handling precision and valuable equipment.
High degree of automation and reliability: Utilizing a PLC automatic control system, the process curve is precisely controllable, reducing human errors and ensuring consistent quality of batches of products.
Comprehensive solutions: We not only offer standard equipment, but also provide customized coal gas phase drying solutions based on your specific product and process requirements, becoming your reliable process partner.