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Comparsion List for all kinds of drying method | ||||||||||||||
Traditional steam drying | Hot wind drying | Platen Vacuum drying | Microwave drying | Common High frequency drying | CNHF High frequency vacuum drying | |||||||||
Drying speed | slow | slow | Slightly faster | Fast | Fast | Fast | ||||||||
Working range | Timber thinkness 10-55mm | Timber thinkness 10-55mm | Thinner timber drying is suitable for panel of floor | Thinkness is less 20mm | It is suitable to dry veneer,thinner timber,hard wood or thinker timber(especially for red wood) in final drying and secondary drying | |||||||||
Loading method | Cumbersome loading it needs put baffle between wood timbers for air convection | Cumbersome loading it needs put baffle between wood timbers for air convection | More cumbersome loading | Simple Loading .but it has requirments for loading position,or the wood will be dried uniformly. | Very simple. Directly stack timber on feed device,ni need baffle. | |||||||||
Flatness after drying | Bad,easy deformation and bend | Bad,easy deformation and bend | Good,Good flatness by hot platen | Better | Best.The timber will not happen deformation and bend under the hydraulic platen press timber tightly | |||||||||
Uniform moisture content after drying | Little | Much | Little | Less | Least | |||||||||
Drying cost | Low cost.But it is high cost for drying hard and thicker wood. | Low cost.But it is high cost for drying hard and thicker wood. | Higher | Highest | Higher.but low cost for hard wood,thicker wood and secondary drying for wood. | |||||||||
Uniform moisture content after drying | Good | Worse than traditional steam drying | Good | Commom | Bad | Better | ||||||||
Operation | Complicated operation and works need professional training | Complicated operation and works need professional training | Complicated operation and works need professional training | Simple | Simple | Simple | ||||||||











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