Energy Use in An Industrial Veneer Dryer

An analysis of the energy use for an industrial veneer dryer showed that 24 to 36 percent of the heat supplied to the dryer was used to heat air induced into the dryer–air not needed for the drying process. Reported information indicates that such conditions of dryer operation are quite common. There is much potential for reducing energy used in veneer drying. The approach most fruitful for dryer energy reduction is by minimizing air intake to the dryer. Air intake reduction can be achieved by better stack damper positioning and control and by better sealing of the dryer–especially at the ends. Unequal length of zones in a longitudinal-flow dryer can make air-intake reduction more difficult. An additional benefit of reducing dryer air intake is that the volume of blue-haze gases from veneer dryer stacks is reduced. The cost of equipment to control blue-haze would therefore be lower at the reduced flow volumes.

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