旋转式造粒喷头制造技术改进及应用

针对旋转式造粒喷头在使用过程中喷洒不均匀、焊缝易开裂、使用寿命低等问题，对设备结构、工作原理、原加工方案开展研究，通过比较分析直孔与斜孔喷头的优缺点，并结合使用效果，确定了斜孔喷头的研究方向。通过理论推导与计算，确定了最优斜孔角度，有效保证了造粒喷头的工作效率与喷粒质量。通过调整加工方案，采用喷筒双面自动焊接和下盖水切割分体的工艺方法，保证了造粒喷头的各项指标，提高了使用寿命。最终改进型喷头通过工程实践证明了可行性，并在国内多家化工厂内得到了推广应用，逐步取代进口技术，达到了尿素生产关键设备、部件国产化的目标。

Manufacturing technology improvement and application for rotating urea prilling bucket

Aiming at the problem of uneven spraying, easy cracking and low service life of rotary granulation sprinkler during use, the equipment structure, working principle and original processing scheme were studied. Based on the comparative analysis of the advantages and disadvantages of the straight hole bucket and the inclined hole bucket, and combined with the application effect, the research direction of the inclined hole nozzle was determined. Through theoretical derivation and calculation, the optimal angle of inclined hole was determined, which effectively guarantees the working efficiency and the quality of prilling bucket. By adjusting the processing scheme, adopting the process of double-sided automatic welding of spray drum and water cutting of lower cover, the indexes of prilling bucket are guaranteed and the service life of prilling bucket is increased. Finally, the feasibility of the improved prilling bucket has been proved by engineering practice, and it has been popularized and applied in many domestic chemical plants, gradually replacing the imported technology, achieving the goal of localization of key equipment and components in urea production.