To effectively shorten the production cycle of NPK fertilizer production lines, the following aspects can be considered:

1. Optimize the production process: Adopt efficient granulation and drying technologies. Using efficient drying equipment, such as hot air drying, can shorten drying time and reduce energy consumption. Ensure that unqualified granules after screening are quickly returned to the granulation system to reduce the time the material remains on the production line.

2. Improve Equipment Efficiency: Introduce automated control systems to monitor and adjust key production parameters, such as temperature, humidity, and material flow, in real time to ensure stable and efficient production. Ensure that fertilizer equipment is in good operating condition to reduce downtime caused by equipment failure.

3. Raw Material Pretreatment: Ensure that the moisture content of raw materials meets the required standards before entering the production line to avoid impacts on production efficiency due to excessively high or low moisture levels. During the batching stage, ensure that all raw materials are thoroughly mixed to improve granulation efficiency. 4. Environmental Control: Utilize efficient exhaust gas treatment systems, such as cyclones or water scrubbers, to ensure compliance with exhaust gas emission standards while minimizing the impact of exhaust gas treatment on the production cycle.

5. Utilize New Technologies: Utilize catalytic technology to convert agricultural waste into high-value fertilizers, improving nitrogen, phosphorus, and potassium recovery efficiency and reducing production cycles.

These measures can effectively shorten the production cycle of nitrogen, phosphorus, and potassium fertilizer production lines, improve production efficiency, and ensure product quality.