High-frequency vacuum drying working principle:
High-frequency vacuum drying is a combined method of high-frequency medium heating and vacuum low-temperature drying, which is a fast and nearly waste-free drying process, particularly suitable for drying hard woods and thick, valuable woods.
High-frequency heating:
Also known as high-frequency medium heating, it involves stepping up a standard 380V AC power supply to rectify and convert it into a high-frequency electromagnetic field. High-frequency heating can be achieved through the relevant equipment equipped with anode and cathode plates.
High-frequency heating is a penetrating type of heating, where water in the electric field is uniformly heated. Areas with more moisture absorb more high-frequency electric field, while areas with less moisture absorb only a small amount. This ensures the effective utilization of high-frequency output power. Since materials like wood or fiber lack polarity, they do not absorb the electric field significantly, making the high-frequency power usage essentially waste-free. This saves energy consumption and reduces drying costs.
Vacuum condition, primarily utilizing the lower boiling point of water under vacuum to enhance evaporation speed, and the increased moisture gradient on wood surfaces. During the drying process, the wood's surface moisture evaporates into the surrounding air, while internal moisture continuously migrates to the surface. This accelerates the drying speed at lower temperatures, ensuring high-quality wood drying. The vacuum state, a negative pressure condition with a certain water absorption effect, is similar to high-frequency pressure gradients, further speeding up the moisture expulsion from the wood core. Additionally, under low-pressure conditions, the oxygen in the drying medium, due to reduced thermal and oxidative reactions, causes less material discoloration, thus maintaining the natural color of valuable wood.
Based on these characteristics, the high-frequency vacuum drying applied to wood drying has become a scientific and environmentally friendly drying method, particularly suitable for the drying of wood with large cross-sections, such as hardwoods.
Tenglong High-frequency Vacuum Wood Drying Machine Features:
One: High-frequency heating is used to achieve rapid temperature rise and quick drying of wood.
Two, heat both the interior and exterior of the wood evenly, ensuring high quality and preserving the wood's natural color.
Three: Vacuum suction water reduces the temperature during the wood drying process, leading to low-temperature vaporization of the wood, making it less prone to cracking and accelerating the dehydration speed of the wood.
Four: Environmentally friendly, non-polluting.
Five, high-frequency waves can kill insects and bacteria hidden within the wood panels, further ensuring the quality of wood drying while shortening the drying cycle.
Especially suitable for thick, hard, large-section square timbers (which require a long time to dry using conventional drying methods), such as precious redwood timber like rosewood, huanghuali, and other varieties, as well as the drying of wooden flooring.
Also utilizes secondary drying for wood that has been returned from moisture after small batch and expedited processing.
Tenglong High Frequency Vacuum Dryer Specifications:
Automatic control via an intelligent human-machine interface; operators only need to set basic parameters such as drying process, initial moisture content, and the required final moisture content, with the entire drying process controlled by the program.
2. High-frequency automatic tuning, no manual adjustment required. The fault detection system continuously monitors the equipment's operating status, and in the event of a fault, the device will shut off power with an alarm and provide fault information.
3. Moisture detection utilizes an online, real-time moisture content monitoring system, allowing for immediate moisture content measurement of wood at any time, ensuring the accuracy of moisture content monitoring.
4. Utilizes optical fiber temperature detection devices for accuracy, free from high-frequency interference. Temperature detection is solely for ensuring drying efficiency, avoiding the significant data errors that can occur with standard metal probes in electric fields.
