The problems in producing big grain urea in the process of prilling were analyzed.Some parameters of prilling nozzle were studied and the idea of a new type prilling nozzle was proposed.

• 对喷淋造粒工艺生产大颗粒尿素在生产过程中出现的问题进行分析,特别对生产大颗粒尿素所用喷头的一些指标进行研究,并提出了新型喷头的设想;