Water requirement of drum organic fertilizer granulation process
The working principle of the drum fertilizer granulation process: the material enters the front end of the rotating cylinder from the feeding pipe (the slope of the feeding pipe is greater than the natural inclination of the material) and the steam inlet pipe at the front end of the cylinder ejects water steam with a certain pressure. The nozzle of steam inlet pipe is located at the bottom of material. And the steam has a certain pressure. Therefore, the material can obtain some moisture evenly and form small particles. Because the cylinder has a certain slope. Under the action of gravity and friction force of lining plate, these small particles continuously move in the circumference and axis direction of the cylinder, and in the movement, the smaller particles gradually form particles of certain specifications.
Under the condition of stable material supply, the saturated steam can provide heat and moisture at the same time to humidify the material. Through the use of steam, the temperature and viscosity of materials are improved in the fertilizer pellet machine, and the moisture content of materials can be reduced in the process of pelletizing, thus reducing the drying load. Moreover, the liquid phase distribution of steam can be more uniform than that of adding water. Only when the liquid phase of the material is insufficient and the material is unstable, water can be added as a supplementary means. In the production process, we have encountered that due to the unreasonable installation of steam nozzle and uneven distribution of liquid phase of material, the place where there is more liquid phase of material adheres to a large ball, and where the liquid phase is insufficient, the material is difficult to form a ball, which affects the formation of particles. In view of this situation, we can increase the steam nozzle to increase the steam receiving area of the material.
The water content of raw materials directly affects the granulation. Even if steam and water are not added in the production of some materials after mixing, they can not be produced normally. Therefore, keeping a low moisture content of the material is conducive to the addition of steam in granulator machine for fertilizer, and to the improvement of the temperature and viscosity of the material, so as to improve the compatibility between the materials and the pelletizing rate.
