Working Principle of Drum Organic Fertilizer Dryer

 The drum organic fertilizer dryer is a key drying equipment in the organic fertilizer produciton line, mainly used to reduce the moisture content of fermented organic fertilizer to meet the standards for granulation, storage, and transportation. Its working principle revolves around two core aspects: heat exchange and material tumbling and conveying.

During the operation of fertilizer produciton machine, the fermented wet organic fertilizer is fed into the inclined rotating drum through the inlet. The drum is driven by a motor and rotates slowly.  Internal baffles rotate with the drum, continuously lifting and scattering the material, creating a uniform material curtain inside the drum. Simultaneously, high-temperature hot air from the hot air furnace enters the drum from either the inlet or outlet end, contacting the scattered material in a counter-current or co-current flow. During this contact, the heat from the hot air is rapidly transferred to the wet material, causing the moisture in the material to absorb heat and vaporize.

The vaporized water vapor, along with the exhaust gas, enters the dust removal and deodorization device. After purification, it is discharged in compliance with standards. The dried organic fertilizer, under the influence of the drum's inclination angle and rotation, slowly moves towards the outlet and is finally discharged as a finished product. Throughout the process, the drum speed, hot air temperature, and material residence time can be flexibly adjusted to suit organic fertilizer raw materials with different moisture contents, ensuring that the moisture content of the dried material remains stable within the appropriate range of 15% to 20%, meeting the feeding requirements of subsequent new organic fertilizer granulators.

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