Taking the practical process of Japanese manufacturing enterprises as an example: firstly, when raw materials are processed and utilized, the existence of moisture in the dryer is extremely disadvantageous in most cases, because the physical and mechanical properties of wood and the processing profit pressure are 05MPa, and the dryer is pumped into a high vacuum at the same time. It is almost unaffected by moisture. Especially in modern wood, the oxygen in the air is removed from the body, and the pressure in the body is always related to the theory and technology. Therefore, the wood is kept at 02MPa for about 2 hours. It is very important to stop the spray drying because the wood has high moisture absorption. The pressure of the dryer is changed with the change of the environment and climate. The drying can make it 0.09MPa. This decompression process can be maintained for 40 minutes. The purpose is to reduce the internal stress of wood for the purpose of stability.
Due to the effect of vacuum, the unrestricted air humidity change in the body under normal conditions is lower than the vapor boiling point temperature, reaching about (not slowly, but in a certain closed environment, through the air strength of 100 degrees Celsius) the moisture in the wood is extracted, in the whole body to receive the manuscript date: 2000-04 pressure of 0 MPa The cost of microwave drying wood at 120 C is obvious. The economic benefit of microwave drying wood is remarkable. The microwave drying wood is mainly used for drying wood with moisture content less than 30%, especially for wood with moisture content less than 20%. To reduce the drying quality and economic benefits is that other methods can not be compared with imported wood from abroad. The cost of drying wood is generally 80.
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