Traditional drying methods such as infrared, hot air, and steam often suffer from issues like uneven heating, high ambient temperatures, and long processing times. In contrast, microwave energy, as a next-generation heating and drying technology, effectively addresses many of these limitations.
Microwave heating offers several key advantages:
1. It significantly reduces heating time and provides easy control over the process.
2. The material is heated uniformly and selectively without thermal inertia, ensuring better quality.
3. Microwaves have strong penetration capabilities, reaching up to 8 cm deep, allowing both internal and external heating simultaneously.
4. Unlike traditional methods, microwaves do not lose heat through radiation, making them about 30% more energy-efficient than infrared or far-infrared and up to 50% more efficient than other drying techniques.
5. Microwave drying can extend the shelf life of products by 3 to 5 times compared to conventional methods.
6. Tunnel-type microwave equipment enables continuous production, reducing labor intensity, improving working conditions, and supporting modern industrial management practices.
In the context of tobacco processing, microwave heating works from the inside out. Under the influence of the microwave field, moisture within the tobacco is rapidly vaporized and migrates outward, creating numerous micro-pores in the structure. If the initial moisture content of the tobacco is properly controlled and the heating process is carefully managed, an excellent expansion and drying effect can be achieved, resulting in improved product quality and efficiency.
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