A wood waste burner, known as ateepee burner orwigwam burner in theUnited States and abeehive burner inCanada, is a free-standing conical steel structure usually ranging from 30 to 60 feet in height. They are named for their resemblance tobeehives,teepees orwigwams. Asawdust burner is cylindrical. They have an opening at the top that is covered with a steel grill or mesh to keep sparks and glowing embers from escaping. Sawdust and wood scraps are delivered to an opening near the top of the cone by means of aconveyor belt orArchimedes' screw, where they fall onto the fire near the center of the structure.
Teepee or beehive burners are used to dispose of waste wood inlogging yards and sawdust fromsawmills by incineration. As a result, they produce a large quantity of smoke and ash, which is vented directly into the atmosphere without filtering, contributing to poor air quality. The burners are considered to be a major source ofair pollution and have been phased out in most areas. Teepee burners went out of general use in theNorthwestern United States by the mid 1970s, and are prohibited from operation inOregon,[1] as well as southwesternWashington State.There are a few derelict beehive burners remaining in California, Oregon, Washington State andWestern Canada.[2] The majority of wood waste is now recycled and used as a component in variousforest products, such aspellet fuel,particle board andmulch.
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