The drying effect of biology organic fertilizer dryer is mainly affected by four factors: raw material characteristics, equipment structure, process parameters, and the hot air system. These factors directly determine the finished product's moisture content, particle integrity, and the survival rate of live bacteria.

Raw materials are the fundamental prerequisite. If the initial moisture content of the material is too high, it will easily stick to the walls and clump, resulting in slow and uneven drying; if it is too low, it will easily become over-dry and powdery. The particle size and bulkiness of the material are also crucial. Uniform particles and good air permeability result in rapid heating, while large clumps and high viscosity will prolong the drying time. The fiber and impurity content in the raw materials will affect thermal conductivity, requiring pre-dispersion and impurity removal.

The hot air system is the core power source. Hot air temperature directly affects efficiency. Bio-organic fertilizer needs to be controlled at medium to low temperatures to avoid burning live bacteria at high temperatures. The hot air volume and velocity determine the heat exchange intensity; insufficient air volume results in slow drying, while excessive air volume easily causes dust and material loss. Uniform and unobstructed hot air distribution ensures consistent drying of the material.

The operating parameters of the fertilizer produciton machine determine its stability. The feeding speed needs to be uniform and stable; too fast a speed can lead to material accumulation and undercooked material, while too slow a speed results in low efficiency and wasted energy. The drum rotation speed affects material scattering and residence time; a reasonable speed ensures sufficient heat exchange. The drum inclination angle and the structure of the lifting plates determine the material flow rate and heating area; a well-designed lifting plate can significantly improve drying uniformity.

Environmental factors and exhaust gas contribute to the final drying process. Ambient humidity and ventilation conditions affect exhaust gas discharge efficiency; timely exhaust gas discharge reduces internal humidity and prevents secondary moisture absorption. Smooth dust removal and induced draft fan operation are essential for stable negative pressure, preventing air leakage and ensuring consistent drying results.

Controlling these factors effectively reduces the finished product moisture content to the standard range while protecting the activity of beneficial microorganisms, thus improving the quality and yield of organic fertilizer.