2results about "Preheating coke ovens" patented technology

This invention discloses a vertical rice husk carbonization furnace, relating to the field of carbonization furnace technology. It includes a carbonization furnace body, with a preheating chamber, a carbonization chamber, and an air-lock buffer chamber arranged from top to bottom inside the furnace. Isolation grates and fixing plates are respectively installed between the chambers. An air-lock plate is installed at the lower end of the fixing plate and the furnace body. A heat exchange box is located below the air-lock plate, containing a first heat exchange tube. Several second heat exchange tubes are installed in the preheating chamber. This invention employs continuous carbonization and negative pressure carbonization processes. The negative pressure inside the furnace is controlled at 0.3 kPa–0.6 kPa. A closed-loop heat exchange system is formed through multiple layers of heat exchange tubes. The second heat exchange tubes are parallel and interconnected with the first heat exchange tubes, efficiently recovering the waste heat from high-temperature carbonized rice husks to uniformly preheat the raw materials. Combined with the air-lock structure to isolate air, a low-oxygen, slightly positive-pressure carbonization environment is maintained, enabling continuous operation of rice husk preheating, carbonization, and buffer unloading. It also features waste heat recycling, low energy consumption, thorough carbonization, and environmental friendliness with no dust.