quality Activated Carbon Making Machine & Activated Carbon Production Line manufacturer

The working principle of the activation furnace for activated carbon production equipment and the formation of activated carbon! Activated carbon equipment - The activation furnace uses oxygen-containing gases such as water vapor, flue gas (mainly composed of CO2), or their mixture as activators. At high temperatures, they come into contact with the carbon to undergo oxidation-reduction reactions for activation, generating carbon monoxide, carbon dioxide, hydrogen, and other hydrocarbon gases. Through the gasification reaction of carbon ("burning loss"), the purpose of creating pores in the carbon particles is achieved. Its main chemical reaction formula is as follows: C+2H2O 2H2+CO2-18kcal ① C+H2O H2+CO-31kcal ② CO2+C 2CO-41kcal ③ The above three chemical reactions are all endothermic reactions, that is, as the activation reaction proceeds, the temperature of the activation reaction area of the activated carbon activation furnace will gradually decrease. If the temperature of the activation reaction area is below 800 ℃, the above activation reaction cannot proceed normally. Therefore, in the activation reaction area of the activation furnace, it is necessary to simultaneously introduce some air and the activated gas generated by combustion to supplement heat, or to supplement external heat sources, To ensure the activation temperature of the activation reaction area in the activation furnace. Activation reaction belongs to the multiphase reaction of gas-solid system, which includes physical and chemical processes. The entire process includes the diffusion of activator from the gas phase to the outer surface of the carbonized material, the diffusion of activator to the inner surface of the carbonized material, the adsorption of activator by the inner and outer surfaces of the carbonized material, the gasification reaction on the surface of the carbonized material to generate intermediate products (surface complexes), the decomposition of intermediate products into reaction products, and the desorption of reaction products The desorbed reaction products diffuse from the inner surface to the outer surface of the carbonized material through three stages of activation and pore formation. Stage 1: The opening of pores formed during carbonization but blocked by disordered carbon atoms and impurities, i.e. at high temperatures, the activated gas first reacts with disordered carbon atoms and impurities. Phase 2: The opened pores continuously expand, penetrate, and develop towards depth. The carbon atoms at the edge of the pores, due to their unsaturated structure, are prone to react with activated gases, resulting in the continuous expansion and development towards depth of the pores. Three stages: formation of new pores. As the activation reaction continues, new unsaturated carbon atoms or active sites are exposed on the surface of the microcrystals, and these new active sites can react with other molecules of the activated gas. This uneven combustion on the surface of the microcrystals continuously leads to the formation of new pores. The main operating conditions for the process control of the activation furnace include activation temperature, activation time, flow rate and temperature of the activator, feeding speed, and oxygen content in the activation furnace. The carbonized material is crushed and screened, and qualified carbon particles are selected as activation raw materials. Coarse carbon particles are returned to the crushing and screening process, while fine carbon particles are returned to be used as fuel. Qualified carbon particles are lifted by a bucket elevator to the top of the activation furnace and slowly added into the furnace with the help of the gravity of the carbonized material. The carbon is added to the furnace of the activation furnace at certain intervals and reacts with the superheated steam sent in. The carbon is heated and dried by the steam during the gradual descent process, achieving activation, Then it is cooled and discharged from the lower discharge port at intervals of time. Water vapor is first preheated to 300-400 ℃ and sent to the activation tube as an activation medium. It flows in parallel with the carbonized material from top to bottom and continuously comes into contact with the carbon particles during the flow process. After a series of activation reactions, the carbon is burned off at the lower part of the activation tube and turns into water gas. The water gas and activated carbon enter the cooling section together and are separated in the separation tube. It is then sent to the outer furnace of the bottom activation tube for combustion through the lower flue, The air is sucked in by the secondary air pipe to meet the combustion needs. The high-temperature flue gas generated by combustion is transferred to the grid through a heat storage chamber for heat exchange, maintaining the furnace temperature and allowing the activation reaction to continue continuously. After being activated by activated carbon equipment - activated furnace, the activated carbon material is cooled, crushed and screened, and the finished product is sold. The fine carbon is recycled and enters the powdered activated carbon process.

Activated carbon equipment_ Exploration of one-step coke oven process technology. In April 2023, our company and experts in the field of activated carbon equipment preparation at Xi'an Thermal Power Institute jointly developed a process route for one-step coke oven production The preparation of one-step coke oven adopts multi-layer and multiple refractory bricks, which are assembled from top to bottom into: raw material bin, carbonization section system, activation section system, physical cooling system, and then connected to: cooling machine, elevator, material bin, linear vibrating screen and other deep processing systems. Unlike traditional activated carbon production equipment furnaces, one-step coke ovens are integrated furnaces for carbonization and activation, with stronger steam penetration and better final product indicators. This furnace body is a new type of structure. The technical discussion meeting lasted for 2 days and ultimately decided on the furnace structure, brick selection, masonry division of labor rules, PLC automation system construction, etc. The project is scheduled to be officially implemented in mid 2023. Thank you to the leaders of Xi'an Thermal Power Institute for their trust and support in our company. Our company will strive to build a good engineering system for this project.