In the actual production process, generally to install raw material drying equipment. When the raw water is evaporated, with the rise of temperature, entered the carbonization and pyrolysis of the second stage, the pre charring stage, this stage temperature is 150 to 275 degrees. Raw materials in the hemicellulose and the unstable component starts to break down, then from the vent in the coming out of "smoke", mainly CO2, CO and a small amount of acetic acid, needs continuous extraterrestrial heating it. When the output is low calorific value gas. These two phases is endothermic reaction, as temperatures continue to rise, more than 275 DEG C, raw materials began to accelerate the decomposition of, with the increase in temperature, accelerated the decomposition of velocity of biomass pyrolysis process and product, generate a large number of decomposition products, such as methane, ethane, ethylene, acetic acid, methanol, propanol, wood tar oil, due to biomass containing oxygen, the stage show is an exothermic reaction can that make the reaction go on the stage without external heating. This stage can be maintained at 450 degrees, is called pyrolysis stage. The main products of biomass carbonization and pyrolysis are formed in this stage. Especially of wood vinegar and wood tar is almost all formed at this stage in the. If then stop heating, the product obtained with carbon, xyloid coal gas, wood tar, wood vinegar liquid, which carbon yield was the highest, the wood gas yield is very low, because carbon products and some volatile points are not factored out, at this moment is: wood gas calorific value is not too high, generally at around 3000 kcal / m3. In the process in the production of carbon based, generally at this stage will stop heating, in order to obtain carbon productive effect, per ton of raw material can produce carbon 330 ~ 400kg. If you want to make the quality of the wood gas, gas and heating value also increased, pyrolysis process would continue, namely, the calcination stage, stage calcination temperature can be added to 500 DEG C, can also be added to 600 DEG C, 700 DEG C, and 1000 DEG C above. The calcination stage with the increase of temperature no longer produce wood vinegar and wood tar, but on the gas, which is mainly CH4 and H2, can greatly improve the gas calorific value of wood. Such as pyrolysis at 1000 DEG C, wood gas heat 6000 kcal / m3, and charcoal yield only 220 ~ 230kg (per ton of raw materials). In particular, the calcination stage is an endothermic reaction, that is the need of heating. So from the angle of volume balance can not see, and the pyrolysis temperature is good. In the actual production and how to choose what kind of pyrolysis temperature, time, place, because the product structure, for the purpose of production and. 1, the equipment has just started heating, need to heat heating carbonization furnace. A reverberatory furnace is generated by the hot air flow to the combustion carbonization furnace, heating to achieve. Secondly, another is the gasifier, the sawdust by gasification stove ignited, combustible gas produced by the gasification furnace to burn carbonization furnace, reaching the purpose of warming. (gasification of sawdust after carbonization furnace carbon output devices become carbonization of toner, in addition to combustible gas passes through the wood tar recovery system for recycling). 2, carbonization furnace is heated to a certain temperature, which produce combustible gas through the dust separator to separate dust and dust separation of combustible gas and the wood tar recovery system recovered wood tar (generally every production of one ton of carbon powder can be obtained 200kg-30kg wood tar). 3 until the carbonization furnace heating gas produced, this time the reverberatory furnace heating and gasification furnace gas producing device stop working, preliminary heating equipment at the end of the day. 4, carbonization furnace work about 2-3 hours (temperature and time) after the toner from the furnace into the condenser and flows out from the condenser, normal production facilities, can be continuous and uninterrupted. Therefore, the carbonization furnace called continuous carbonization furnace.