Industrial process using a forced-exhaust metal furnace and mechanisms developed for simultaneously producing coal, fuel gas, pyroligneous extract and tar

A sealed, portable industrial furnace for optimizing the concurrent production of charcoal, fuel gas, pyroligneous extract and tar, comprising:

• (a) an upright metallic body for receiving wood or biomass to be processed into charcoal, fuel gas, pyroligneous extract and tar, the upright body having an upper end and a lower end;
• (b) a cover mounted on the upper end of the upright body to close off the upper end of the body;
• (c) a pressure relief system located on the cover to relieve excess pressure generated in the furnace during the operation of the furnace;
• (d) a perforated base structure attached to the lower end of the upright body to extend downwardly from the upright body to define a bottom portion of the base structure opposite the upright body;
• (e) a discharge valve for closing off the bottom portion of the base structure during the production of charcoal, fuel gas, pyroligneous extract and tar from biomass and opening the bottom portion of the base structure to unload the charcoal produced;
• (f) a supporting skirt structure encircling the base structure for supporting the upright body in upright position and defining an expansion chamber for the accumulation of combustion gases generated by the furnace and providing a heating source for the biomass at the lower end of the body;
• (g) a series of inlet openings located along the height of the upright body in communication with the interior of the upright body and in communication with flow control valves receiving combustion air;
• (h) a control system for controlling the volume of combustion air flowing through the flow control valves and into the upright body;
• and
• (i) temperature monitoring devices located along the height of the upright body, said temperature monitoring devices in communication with the control system.