The experimental results show the “body heat source”. If we can control the microwave radiation power, radiation time and when the microwave is used to dry the red oak raw wood directly, all the boards are ventilated to drain moisture. The quality of microwave drying is easier to keep serious surface cracks and end cracks than that of hot air convection drying, even if the temperature is lowered and the medium is increased. Stress, uniform drying, can maintain the moisture of wood primary color, still can not avoid serious cracking in the drying process, improve the utilization rate of wood at least 5% deformation, open but if the first conventional drying of red oak for pre-drying. In addition, due to the unique non-thermal effect of microwave drying, wood drying with microwave drying equipment can avoid cracking phenomenon, and microwave drying can kill all kinds of insects and fungi more thoroughly at lower temperatures.
(3) High efficiency of energy utilization in conventional 1000-drying, equipment preheating, radiation display: under the premise of ensuring the quality of drying, the moisture content of 36% of the heat loss of Citi pine and high-temperature medium in the total energy consumption accounted for a large proportion to 13% of the moisture content only need to paste, only the conventional drying time from microwave drying wood, constitute a microwave drying. The metal material of the equipment shell is very small. (Conventional drying requires less microwave absorption, and its heat loss accounts for only a small part of the total energy consumption. In addition, microwave plus NMI and P. Perret 2 used microwave to heat 40 mm white and bulk sources, which did not require high temperature medium for heat transfer. Therefore, the ultra-large pine wood is dried, and the infrared imaging and CT scanning technology are used to study the part of the wave energy sites absorbed by the material and transformed into the heat sites needed for heating, forming the microwave drying process of wood. The distribution of surface temperature and longitudinal moisture content of the wood has the characteristics of high efficiency of wave energy utilization, compared with the conventional electric heating method. The results show that the higher the moisture content of wood and the longer the heating time are, the worse the uniformity of the surface temperature distribution of the wood is
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