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What are the processes of compound fertilizer production line?

Description of process design for NPK fertilizer production line:
NPK fertilizer production line
1. Batching process:
Electronic batching or disc batching.

2. Crushing process:
The mixed fertilizer proportioned according to the design requirements is sent to the raw material crusher for raw material crushing. The purpose is to crush various raw materials to certain fineness. Basically, the particle size of the raw material is less than 1 mm, which is beneficial to the material in the granulator. Roll inside to meet the standard ball.

3. Granulation process:
The crushed mixture is conveyed into the fertilizer granulator machine through a conveyor. The liquid phase provided by the slurry or water in the extrusion granulator is made by the centrifugal force brought by the rotation of the fertilizer granulator machine to make the material into at present, the production of organic fertilizer is better with a disk pelletizer. The pelletizing rate of the disk pelletizer can reach more than 90%, but the output at the table is low.

4. Drying process:
The granulated material is conveyed to the rotary three-cylinder dryer through a conveyor. The hot blast stove is set at the inlet of the dryer to provide heat for drying the material in the dryer and evaporate the moisture in the formed material into water. The steam is led to the dust collection room through the fan to remove the dust. After the material enters the dryer, the material has a high liquid phase and low ball strength. In order to ensure the ball shape of the material, we use it in the design of the dryer.

5. Cooling process:
The moisture content of the materials after drying out of the dryer generally does not meet the moisture requirements of organic fertilizers. Cooling in the cooler is very important for the NPK fertilizer manufacturing process.

6. Screening process:
After cooling, the organic fertilizer material still has a certain temperature. After the organic fertilizer material enters the screening machine, the organic fertilizer material is coarsely divided into grades, and the fine powder after screening is directly returned to the granulator for granulation. After sieving, the coarse material is sieved out and then crushed by the return chain crusher, and then returned to the granulator to be re-granulated. The finished material is directly sent to the silo of the packaging scale. On the other hand, the compound fertilizer material is also used in the screening project. The cooling project plays a certain role in reducing the temperature and preventing agglomeration of materials.

7. Packaging process:
The finished organic fertilizer after coating enters the silo of the packaging scale, and is automatically counted by the set quota, and then put into the packaging bag, and then through the automatic sewing package system, the compound fertilizer after sewing can be stacked in the warehouse. In principle, It is required that each pile does not exceed 8 bales in height, and does not exceed 10 bales in height. The ground must be protected against moisture.