Wood Drying Topics > General Discussion

Dry kilns emissions reduction

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SenecaMike:
Do you use emissions reduction equipment to reduce VOC's from your kilns?
What type of system do you use?

MichaelM:
I know of a couple installations with stacks to raise the exhaust and reduce local impact.  I do not know of any lumber dry kilns in the U.S. with emissions controls, such as rtos scrubbers, esps or baghouses.

ingo wallocha:
Hi Mike,

The best way to reduce VOCs is to have a proper heat recovery system on your vents together with a smart software. This will reduce the VOC but it will of course create kiln condensate.

Does that make sense to you?

MichaelM:
When I was working at osu, we measured the emissions before and after a heat recovery device.  There was no difference in VOC, MEOH, or COOH.  We did not measure the other MACT haps common to lumber - propionaldehyde, acrolien, and acetaldehyde.

ingo wallocha:
The nature of the VOCs certainly stays the same. I am just saying you have less VOCs with heat recovery because the recovered heat will be transferred into kiln condensate. 

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