As we all know, microwave drying equipment is more efficient than other drying equipment. The high efficiency is mainly due to two aspects: 1. Penetrating heating makes the heating process more direct and short-lived; 2. Straight-line mode of water vapor Greatly improve the evaporation effect of water vapor.
Microwave is an electromagnetic wave. When a polar molecule is encountered, the microwave conducts volatility to the substance and is finally absorbed by the substance. Any substance is composed of polar molecules and non-polar molecules. Under the action of the microwave field, the polar molecules will change rapidly from the original random distribution state to the polarity of the electric field as the magnetic pole of the magnetic field changes. The change motion is performed at a frequency of 2.45 billion times per second (for example, microwave at 2450 HMZ frequency), causing intense movement of molecules and friction collision, thereby generating heat, and microwave energy is directly converted into heat energy in the medium, so that the temperature of the medium is continuously increased. This is the basic principle of microwave heating of materials. The microwave penetration ability is strong, so that the inside and outside of the material can be heated at the same time. On the other hand, since the microwave does not heat the air, it is not conductive heating, and there is no heat radiation loss, which is more than 30% energy-saving than steam heating and far-infrared heating.
Water is a very polar molecule. Under the action of microwave heating, water can absorb microwaves very quickly and convert microwave energy into heat energy. When the temperature reaches 60 degrees or above, water molecules begin to vaporize and form water and gas. Evaporate away from other substances to achieve the purpose of drying other substances.
In the aspect of water vapor evaporation, since the object heated by microwave drying is simultaneously heated inside and outside, the water vapor inside the object can be completely evaporated in a short time, and since there is no hot air in the drying box, there is no need to consider the problem of heat loss, so it can be adopted. The high-power fan directly drains the wet steam. Therefore, microwave drying efficiency is higher than other drying equipment.
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