Patent ID: 6892655

Claim:
A pyrolysis chamber comprising: a rectangular metallic duct; at least one hot air jacket section surrounding said metallic duct; a heat transfer source which utilizes exhaust gases from a cement kiln to externally heat an area between said duct and said jacket sections; an exhaust for pyrolysis gases created in said chamber, said exhaust configured to provide heat to the cement kiln; and a drum transport device for transporting a row of drums of waste material through said pyrolysis chamber, said drum transport device configured to push or pull the drums through said metallic duct, said drum transport device comprising: a plate; a first pair of connected and vertically spaced horizontal bars on a first side of the row of drums, said bars comprising an end; a second pair of connected and vertically spaced horizontal bars on an opposite side of the row of drums, said bars comprising an end, said ends of said first pair and said ends of said second pair being connected to said plate: a plurality of middle horizontal bars, one said middle horizontal bar between said first pair, one said middle horizontal bar between said second pair, said middle horizontal bars configured to move in unison with one another, and further configured to move relative to said first pair and said second pair of bars; a plurality of vertically oriented hinge doors, a first plurality pivotably connected to said first pair of horizontal bars, a second plurality pivotably connected to said second pair of horizontal bars; and a plurality of tie rods pivotably connected at a first end to said hinge doors and pivotably connected at a second end to a corresponding said middle horizontal bar, such that when said middle bar is moved relative to said first pair and said second pair of horizontal bars, said hinge doors swing to a position substantially parallel to said bars or substantially perpendicular to said bars.