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ENERGY CONTROL ENGINEERING

Lake City, Minnesota 55041

 

 

Subject:

Pollution Emissions from Shavings Drying Operations

 

-- Using Jackson Lumber Wet Log Shaving Mills
-- Drying in a
Rotary Three Pass Dryer
-- Energy for Drying from a 12MM BTU/hr Webb Burner™ firing Dry Screened Fines

A Synopsis of the Process

Whole wet logs are processed through shaving mills. Shavings produced are fed through a rotary drum dryer where their moisture is reduced from 45% to 12% (or lower). Dry shavings are then fed over a screen. Small "dry sawdust"-like particles are screened out and used as fuel to heat the dryer.

A Schematic of the Operation

webbdiagram

This writer speaks from experience on the subject of system pollution emissions. Referring to the system schematic above, note there is only a singular exhaust to the atmosphere: that being from the dryer's exhaust cyclone. Here are the factors that contribute to the emissions, or lack thereof, from that exhaust.

You can view existing identical systems in operation at many locations both in America and internationally. Some have been operating for 20+ years. Obviously, these systems work very well!

If you are planning a shavings drying operation and need help talking with your Pollution Control authorities, please call Jackson Lumber Harvester at 715-926-3816.

W. B. Webb, Physicist, Registered Professional Engineer