Based on the test results and years of production experience, the microwave output power listed in the microwave drying reference list of some commonly used tree species and sawn timber specifications is proposed. For a channel
like Wuxi Furniture Factory II, which consists of four two resonant cavities in series, the first three (1-3) can be of medium power. Begin to gradually increase to the maximum upper limit, the last (fourth) take the minimum power (lower limit), to avoid serious mismatch, damage pipe 2.
The results showed that the quality index of wood microwave drying could be added with carbonization index on the basis of convective drying quality index (average final moisture content, drying uniformity, moisture content gradient, stress deviation, visible defects such as cracking, bending, etc.). There are 385 samples in this experiment, only 9 of them are carbonized, accounting for 2.3%. If the moisture content gradient on the thickness of the wood according to the above drying criteria, the result of this test is satisfactory.
It reflects the obvious law that the water content of surface layer is higher than that of core layer (see Table 1).This is the characteristic of microwave drying different from convection drying. The distribution of final moisture content of 01.2.6 Xin Lan song 48 was uniform along the length of test material.
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