After granulation, the organic fertilizer production line still has the following processes to be completed.
1. Drying section. The dryer adopts the method of cylinder edge transmission, flange connection, and direct heat transfer, which is suitable for drying organic fertilizer after granulation. The material to be dried enters the copying plate drying area with a special combination. Due to the tilting and rotating movement of the machine body and the copying plate, the material is constantly carried by the copying plate to be fully scattered and move longitudinally. At the same time, it is fully heat exchanged with the high-temperature furnace gas from the hot air furnace to evaporate the water and dry the material. The material and flue gas to be dried are operated in a downstream and slightly negative pressure manner. There is a secondary granulation area in the dryer, which can be used to perform secondary granulation on some ungranulated materials, which is conducive to improving the granulation rate of the system. During the drying process, it is necessary to monitor at any time and adjust the temperature of the dryer furnace head and furnace tail by adjusting the hot air furnace temperature and the exhaust fan air volume according to the process requirements to achieve the drying index of the dried material. The materials that have completed the drying operation are transported to the next section of the organic fertilizer production line by a belt conveyor.
2. Cooling section. The rotary cooler is mainly used for cooling organic fertilizer products after drying, and can directly cool the hot granular fertilizer to near room temperature. The materials entering the cooler continue to move forward under the rotation and tilting of the machine body. At the same time, the induced draft fan draws air from the tail of the cooler to the head to meet the counterflow of the materials and take away the heat of the materials. During the cooling process, the cold air also takes away some moisture. The cooled materials are easy to pack in time and quickly to prevent agglomeration during storage. The machine adopts micro-negative pressure operation, which reduces pollution and improves the working environment. It has the characteristics of reasonable structure, stable operation and strong adaptability. The cooled materials are transported to the next section of the organic fertilizer production line by a belt conveyor.
3. Screening and large particle crushing section. The screening section is mainly used to separate fine powder, finished products and large particles in the materials. First, the fine powder in the semi-finished products is separated, and then the large particles are separated. The separated large particles are crushed by the large particle crusher and then enter the return belt together with the separated fine powder, and return to the granulator for granulation. The finished product enters the next section of the organic fertilizer production line.
4. Packaging section. The finished product is lifted by the skin elevator to the silo on the packaging machine, unloaded into the metering scale body, and automatically weighed according to the set weighing weight. The weighed material enters the sewing section through the conveyor, and is sewn and packed into the finished product warehouse.
