These are drying kilns. Sort of like a garden shed with a railroad to move the lifts of stickered lumber in and out.
These kilns use heat and a dehumidifier to remove moisture from the lumber. It takes a few days to take White Pine down to 6%, and can take up to 3 weeks for some hardwoods.
The wood is always dried before being turned into flooring. Drying makes the lumber much more stable and any cracking or twisting will ocurr during the drying phase. When the lumber has "Done its Thing", we then plane it so that it is flat and true it so that it is straight.
Stickering is basically re-stacking with small spacers to allow the air to flow through the lumber. It really has to be done by hand.
These fans circulate the kiln's air through the stickered wood. Plywood is placed to direct the air to fit each load of lumber individually. If you didn't have the circulation the kiln would not dry the lumber all to the same level.
This unit is the dehumidifier--it simply extracts the water from the circulated air. There are other aspects involved, but for simplicity, we are showing you the basics.
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2 comments:
Hi there is it necessary to have fans to circulate air around the stack when using a dehumidifier. I am thinking about drying timber with a dehumidifier. If I stacked the timber in a concealed room or box with a dehumidifier would the fan within the dehumidifier be enough? Just trying to get my head around it.
Kevin... you need heat and a high capacity dehumidifier. Your method might work, but it may take years!
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