Furnace for burning particulate wood waste material

A furnace for burning particulate wood waste material comprising:

• at least one steam coil connected to a steam source for heating air surrounding said coil;
• a means for transferring said heating air to at least one air intake disposed at a lower portion of said furnace;
• a means disposed at an upper portion of said furnace for charging said furnace with particulate wood waste material entrained in an air flow;
• a plurality of spaced parallel beams supported across a combustion chamber in said furnace in a plane between said upper and lower portions of said chamber and sufficiently above said air intake for developing a turbulent air flow through said beams;
• a plurality of spaced parallel rows of bricks, each said row comprised of a plurality of individual bricks arranged in an end-to-end fashion, perpendicular to and directly and removably supported by said beam in a single plane;
• a plurality of spacers directly and removably supported on said beams and disposed between adjacent rows of bricks, said spacers maintaining a selected open area between said adjacent rows of bricks to permit flow of heated turbulent air from said air intake through the open areas defined by aid beams and bricks to contact and combust particulate wood waste material deposited on said bricks from said charging means, said selected open area being easily varied by changing the spacing between said bricks;
• and
• an exhaust means for disposing of gases formed by combustion of said particulate wood waste material.