Dingli biomass dry distillation carbonization furnace is composed of a carbonization furnace body, furnace cover, inner tank, material cage, combustible gas return pipe, exhaust pipe, flue gas dust removal device, tank lifting device, and thermometer.
The furnace adopts the principle of anaerobic dry distillation to remove the volatile substances in the biomass and achieve the purpose of biomass carbonization.
Carbonization process has four steps: charging sealing furnace - preheat drying - anaerobic carbonization - cooling carbon.
Dingli horizontal biomass dry distillation carbonization furnace consists of an inner tank, insulation, furnace door, rail car, combustible gas-burning pipe, dehumidifying buffer tank, burner, exhaust pipe, and thermometer. The gasifier and flue gas purification device are the optional machines. This furnace using anaerobic dry distillation principle to remove volatile substances in biomass material, to carbonize the biomass material, carbonization process: Feeding raw material and sealing the furnace→Preheating and drying the raw material → Anaerobic carbonization →Cooling and discharging the carbon, total four steps. Feeding raw material and sealing the furnace: use the rail car to feed the raw material into the carbonization furnace and lock the furnace door, finally 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 mainly depends 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 to 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 reduces to below 50℃, then we can open the furnace door and discharging the carbon. The heating-up time and carbonization time of this model carbonization furnace are totals of about 5.5-9.5 hours, so it can finish 3 batches every 24 hours. The exhaust gas is discharged through the dust collector and can meet the environmental protection requirement. 3-5 sets of carbonization furnace used in parallel, peak shifting carbonization process. it can maximize the use of the combustible flue gas heating carbonization furnace each other, reduce fuel consumption.
