Effective Production Control of Compound Fertilizer in Humid Weather
Introduction
The production of compound fertilizer in humid weather presents unique challenges, particularly due to its tendency to absorb moisture and form clumps. High humidity or rainy days can severely impact production efficiency, causing blockages in equipment and chutes. This article delves into effective production control measures to mitigate these issues and ensure smooth operation of compound fertilizer systems in humid environments.
Strategies for Managing Compound Fertilizer Production in Humid Weather
1. Raw Material Handling
Controlling the quality and moisture content of raw materials is crucial. Compound fertilizers have a high solubility and hygroscopic nature, particularly at temperatures around 30°C. The critical relative hygroscopic point for compound fertilizers is approximately 50%, compared to 80% for individual basic fertilizers. High moisture content in raw materials can lead to blockages and poor unloading. Utilizing raw materials with low moisture content and ensuring stable urine concentration can significantly improve granulation conditions.
2. Granulation Control
Maintaining the moisture content of granulation materials below 2.2% is vital. Adhering to the principle of “better dry than wet” and controlling the return volume between 180-210t/h can stabilize the production of finished products. The granulation temperature should be kept between 53-57°C to enhance the granulation rate and minimize moisture absorption in the system.
3. Drying and Dehumidification
Effective drying and dehumidification are essential to combat the high moisture content in the system. When the ambient humidity exceeds 60%, increased powder formation and equipment blockages become prevalent. Adjusting fan dampers and ensuring a negative pressure environment can help remove internal moisture efficiently. Controlling the temperature of drying hot air between 70-90°C and increasing the hot air volume can improve the drying effect and reduce moisture absorption in the material.
4. Screening and Fluidization
Frequent cleaning of screening machines and maintaining fluidization in the fluidized bed are crucial. Ensuring the cooling air volume is sufficient can prevent material from absorbing moisture. Using low-temperature, high-air-volume drying can enhance the efficiency of the secondary air distribution and overall drying process.
5. Washing and Coordination
Stabilizing the concentration of urine around 92% and coordinating the operation of dehumidifiers are necessary to maintain production efficiency. Strengthening cooperation between various production positions ensures timely cleaning and monitoring of equipment, reducing the load and preventing frequent shutdowns.
6. Technical Adjustments
While immediate changes to the production process might be challenging, certain technical adjustments can improve efficiency. Modifying the inlet pipeline of the fluidized bed’s second-stage fan and implementing online cleaning during production can enhance system performance.
Conclusion
Compound fertilizer production in humid weather requires meticulous control and continuous adaptation. By implementing these strategies, manufacturers can mitigate the adverse effects of high humidity, ensuring stable and efficient production. As we explore and refine these techniques, the production process will become more resilient against climatic challenges, ultimately enhancing the quality and reliability of compound fertilizer production.
