The production process of organic fertilizer granualtor machines generates a lot of dust, mainly from material drying, crushing, feeding, granulation, discharge, and conveying height differences. This can be addressed through a comprehensive approach involving equipment modification, process control, and sealing/dust removal.

First, control the moisture content of the raw materials. Keep the moisture content of the organic fertilizer materials within a suitable range to avoid excessive dryness and dust generation. Simultaneously, pre-wet and mix loose powder materials appropriately to suppress dust at its source. Second, improve the sealing of the entire machine. Install sealed dust covers at the inlet and outlet of roller granulators and disc granulators, and seal the machine body joints with flexible canvas connections to close gaps that allow powder leakage and reduce fugitive dust.

Reduce the height difference in material conveying. Install dust covers at the head and tail of belt conveyors to reduce dust generation from material impact. Use enclosed spiral feeding systems instead of open feeding systems whenever possible. The granulation workshop should be equipped with baghouse dust collectors or negative pressure dust collection devices. Dust collection vents should be connected to the dust-generating points at the granulator's inlet and outlet to centrally collect dust, thus reducing dust and allowing for the recovery of powder for re-granulation.

Routine maintenance is also crucial. Timely replacement of aging seals and sealing of machine cracks are essential. Regular lubrication of equipment reduces vibration and dust generation. The workshop should be equipped with appropriate ventilation and dust suppression facilities, and regular wet cleaning should be conducted. Through comprehensive measures such as raw material humidity control, machine sealing, negative pressure dust collection, and reducing conveyor drop, dust levels at the organic fertilizer granulation site can be significantly reduced, improving the working environment and minimizing raw material waste.