The characteristic difference of industrial microwave drying insecticidal equipment is that heat is not introduced into the surface of the object, but the microwave is directly heated by the moisture contained in the material and the wood itself. The temperature inside the material is higher than the surface due to evaporation of the surface moisture of the material. The outward pressure difference is formed inside the material, which accelerates the surface migration of moisture. Industrial microwave drying insecticidal equipment Dry wood is made of wet wood as a dielectric. Under the action of microwave electromagnetic field, it causes polarization of water molecules in wet wood. Due to frequent alternating electromagnetic fields, it causes intense movement of water molecules, and friction generates heat. To make the wood dry. The direct effect of microwaves in the interior of the dried wood is called "diathermy." The time required for "diathermy" is independent of the thickness of the wood and is related to the electric field strength, the microwave frequency, and the dielectric properties of the wood. When microwaves act on wood, when the temperature inside the wood is higher than 100 °C, excessive water vapor pressure is generated in the wood, which accelerates the movement of water molecules. Therefore, the speed of drying wood by industrial microwave drying insecticidal equipment is much higher than that of convection drying (natural drying, steam drying, infrared drying, etc.).
Industrial microwave drying insecticidal equipment using industrial microwave drying insecticidal equipment generally uses microwave frequency of 915 MHz, microwave penetration depth of 80 mm, microwave frequency of 2,450 MHz, penetration depth of 50 mm, so it can fully meet the general Finished finished product. For different production sizes and drying requirements, different forms of microwave wood drying equipment can be used; for various woods with different properties, it is necessary to select the appropriate microwave heating speed to achieve the best process conditions. .
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