Working Principle
To feed the raw material into the carbonization furnace and lock the furnace door, finaly sealing the furnace. Preheating and drying the raw material: use the wood or other fuel heat the raw material inside the furnace, from room temperature slowly heat up to 220-250℃, this process time is about 1.2 to 2.0 hours (the specific heating-up time is mainly depend on raw material moisture content, density, diameter size,etc), discharge water inside the raw material and the air in the inner tank. Anaerobic carbonization: When the temperature inside the carbonization furnace increase to there is little yellow smoke discharged from the smoke tube ( hydrogen,oxygen and other volatile substances). it means start the carbonization process, then we can recovery of combustible flue gas into furnace ignition, Adjust the intake combustible flue gas amount, keep the temperature in the inner tank about 300-550℃, 2.0-3.5 hours (the specific temperature and carbonization time is mainly depend on raw material moisture content, density, diameter size and carbonization degree,etc). When it stops burning naturally inside the furnace, the carbonization is finished. Cooling and discharging the carbon: when the carbonization is finished, we need to open the cooling water valve to cool the inner tank, when the temperature inside of the inner tank reduce to below 50℃, then we can open the furnace door and discharging the carbon. The heating-up time and carbonization time cooling time of this machine need 12 hours