2026/03/03
In terms of structural optimization, a variable-pitch double helix is adopted. The large pitch at the feed end facilitates rapid conveying, while the small pitch at the discharge end ensures thorough turning. Crushing teeth and an anti-stick, wear-resistant coating are added to reduce material adhesion and fiber entanglement. Optimized helix angle and blade layout achieve three-dimensional turning, reducing the temperature difference between the top and bottom of the pile and ensuring uniform oxygen supply. Upgraded seals and bearings reduce the failure rate and improve continuous operation capability.
For intelligent control, a variable frequency speed control system is equipped to automatically adjust the helix speed and travel speed according to the material's moisture content and temperature. A closed-loop control system for temperature and oxygen content is established, increasing the turning frequency in the high-temperature section and providing reasonable heat preservation in the low-temperature section to avoid excessive turning leading to heat loss or insufficient oxygen supply. Linkage with a bottom aeration device enhances deep oxygen supply, improves microbial activity, and accelerates organic matter decomposition.
Process and operation and maintenance are equally crucial. Pre-crushing of raw materials and adjustment of carbon-nitrogen ratio and moisture content reduce turning resistance. The depth and frequency of turning are controlled in stages: shallow turning during the heating period to promote microbial growth, deep turning during the high-temperature period to supply oxygen, and light turning during the cooling period for stable maturation. A regular inspection system is established to promptly clean residual materials and maintain transmission components, ensuring stable equipment operation.
After comprehensive optimization, turning is thorough, oxygen supply is more sufficient, the fermentation cycle can be shortened by more than 30%, the uniformity of maturation and fermentation yield are significantly improved, while energy consumption and operation and maintenance costs are reduced, making it suitable for large-scale bio-organic fertilizer production lines.
