The smoothness of the inner wall of a biology organic fertilizer dryer directly determines drying efficiency, finished product quality, and the operational stability of the fertilizer produciton machine, making it a key factor affecting the entire production line.

A smooth inner wall ensures smooth and even material flow within the drum, reducing the likelihood of sticking, clumping, or material buildup. This allows for more thorough contact between the material and hot air, resulting in more uniform heating, stable dehydration, higher drying efficiency, and lower energy consumption. Furthermore, a smooth inner wall reduces material retention, preventing localized over-drying or incomplete drying, ensuring uniform moisture content, intact granules, and more consistent appearance and quality in the finished product.

A rough inner wall, with scratches or scale buildup, easily leads to the adhesion and accumulation of wet material. Adhered material forms hard scale that accumulates, not only occupying valuable drum space but also hindering heat transfer, leading to decreased drying efficiency and increased energy consumption. Prolonged exposure to heat can cause scorching and spoilage of the accumulated material, affecting the fertilizer's efficacy and quality when mixed into the finished product. A rough inner wall can also scratch and abrade the granules, increasing the pulverization rate and reducing the granule qualification rate. Furthermore, a rough inner wall increases the operating load on the equipment, increases motor power consumption, and in severe cases, may lead to uneven stress on the cylinder, affecting the equipment's lifespan. Material adhering to the wall is difficult to clean, and frequent cleaning will delay production and increase maintenance costs.

Maintaining a smooth inner wall allows for smooth material flow, full utilization of hot air, and intact granule formation, improving drying efficiency and product quality while reducing energy consumption and maintenance costs. This is crucial for the stable and efficient operation of a bio-organic fertilizer production line.