Working principle of carbonization furnace equipment and requirements of each temperature section

Shuliy's new machine-made carbonization furnace equipment is energy-saving and environmentally-friendly production equipment. It produces fumes in its production. If it can't be processed, it will pollute the environment. Therefore, users need to configure flue gas treatment equipment and shuliy new machine-made carbonization furnace equipment carbonization. In the process of mechanical charcoal, the correct operation and temperature control can guarantee the quality of the machine-made charcoal, so the user will analyze the production of the new machine-made carbonization furnace equipment and the production requirements of each temperature section.

The new machine-made of carbonized furnace equipment manufactured by Shuliy Machinery uses a self-produced gas furnace as a heat source, uses methane gas through a cyclone, and distributes air into the burner. The outlet temperature of the burner can reach 800 ° C ~ 1200 ° C, and its flow rate can reach 3 ~ per second. 5 meters, the generated high-temperature airflow is heated in the periphery of the combustion chamber. It should be noted that when heating, the furnace temperature is between 100 °C and 150 °C, which is a greater value of moisture in the furnace. When the raw material rod is inserted into the kiln, it is brought into 4~8 % water, 1700kg of raw materials can bring more than 100 kilograms of water, these waters are the enemy of carbonization, because the machine-made of carbon raw material rods are very afraid of moisture, the moisture is pulverized into powder, seriously affecting the quality of carbonization, therefore, the moisture system It is an indispensable key. The tidal time is 1 to 1.5 hours. When the temperature in the carbonization chamber rises to 300 °C, a large amount of combustible gas is generated in the furnace. Each kilogram of raw material theoretically produces three cubic methane gas. The gas can be heated and carbonized, and the drying heat source can be used. The temperature of the furnace can be adjusted at will. The low-temperature carbon is generally above 400 ° C (8 hours can be completed), and the high-temperature carbon is above 600 ° C (10 hours).

The carbonization process of the new machine-made carbonization furnace equipment can generally be divided into the following three temperature zones:

First, the drying stage.

From the start of ignition to the temperature of the furnace rising to 160 ° C, the moisture contained in the machine-made rod is mainly evaporated by the amount of external heating and the heat generated by the combustion itself. The chemical composition of the machine-made rod has hardly changed.

Second, the initial stage of carbonization.

At this stage, the heat is generated by the burning of the rod itself, so that the temperature of the furnace rises to between 160 and 280 °C. At this time, the wood material undergoes a thermal decomposition reaction, and its composition begins to change. Among them, the unstable composition, such as hemicellulose, decomposes to form CO2, CO and a small amount of acetic acid.

Third, the comprehensive carbonization stage

The temperature at this stage is 300 to 650 °C.

At this stage, the wood material undergoes thermal decomposition abruptly, and at the same time, a large number of liquid products such as acetic acid, methanol, and wood tar are produced. In addition, flammable gases such as methane and ethylene are generated, and these flammable gases are burned in the furnace. Thermal decomposition and gas combustion generate a large amount of heat, which raises the temperature of the furnace, and the wood material is dry-distilled to char at high temperatures.

In order to calcine high-temperature carbon, in addition to the above three stages, we need to increase the heat so that the temperature in the furnace continues to rise to about 800 ° C ~ 1000 ° C, so that the volatile substances remaining in the charcoal can be discharged and the charcoal can be raised. The carbon content of the carbon increases the graphite structure of the carbon and enhances the electrical conductivity.