Factors To Consider When Selecting A Granulator

1. Consider the characteristics of raw materials:

According to the characteristics of different raw materials, different granulation methods are required. If rolling granulation is considered, it is necessary to check whether the powder has sufficient fineness. The raw material granules are too large, and rolling granulation is not suitable. When granulating, it is necessary to consider whether the raw powder has certain plasticity after kneading with water or other liquids; if it is a wet powder suspension, it needs to consider whether it is easy to atomize. If it is easy to atomize, consider spray granulation. However, spray granulation needs to consider the thermal sensitivity of the raw material.

2. Consider product requirements:

The particle size of the products obtained by different granulation methods is quite different. For example, the size of spray granulation is smaller, but the rehydration performance is better. Extruded granulated products are generally larger in size and can even be made into granules. The products obtained by the methods of stirring and mixing granulation, fluid granulation and the like are irregularly shaped spherical particles, and can be granulated by an organic fertilizer spreader in the next step.

3. Consideration of other factors:

The processing capacity of different granulation methods is quite different, and the space occupied by the equipment is also quite different. Therefore, equipment investment and civil engineering and processing costs need to be considered. Dry granulation inevitably leads to dust generation. However, wet granulation requires drying and energy consumption after granulation, which are factors considered in the design of the granulation process.

4. Filter belt:

It is required to have high tensile strength, resistance to bending, acid and alkali, and temperature changes. At the same time, the specific properties of the sludge should be considered, and a suitable woven texture should be selected to make the filter belt have good air permeability and anti-fouling performance. Performance of mud particles.

5. Deviation adjustment system of roller. This is usually done with a pneumatic device.

6. The tensioning system of the filter belt is generally controlled by the pneumatic system. The tension of the filter belt is generally controlled at 0.3-0.7MPa, and the common value is 0.5MPa.

7. Belt speed control. Different types of sludge have different requirements for belt speed, that is, there is a belt speed control range for any specific sludge. Within this range, the dewatering system can ensure a certain processing capacity and high Quality mud cakes.