Drying the wood to achieve a certain moisture content is an important means to ensure the quality of the wood products, so dry before use. Currently, it is generally heated by hot air microwave drying equipment, this method, regardless of its heat source mode, uses hot air to heat the wood from the outside to evaporate its surface water to form a surface and internal moisture gradient, which promotes the diffusion of moisture from the inside to the outside to achieve the purpose of drying wood.
If the surface evaporation rate is balanced with the internal diffusion rate, the wood is heated evenly, the temperature and humidity are appropriate, and the wood can be dried quickly. Therefore, in order to suppress the initial surface moisture diffusion when drying the wood, the high temperature and high humidity method should be used to increase the thermal conductivity. However, this method is difficult to achieve due to the poor thermal conductivity of the wood itself.
Microwave wood drying characteristics
The moisture in the wood is discharged from the inside to the outside at the same time, so that the expansion and contraction coefficient of the wood is basically the same, which can maximize the loss of deformation, cracking, dryness, carbonization and the like in the drying process, and can significantly improve the wood yield.
The moisture in the wood is discharged from the inside to the outside at the same time, so that the expansion and contraction coefficient of the wood is basically the same, which can maximize the loss of deformation, cracking, dryness, carbonization and the like in the drying process, and can significantly improve the wood yield.
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