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在尿素造粒塔生产粒状尿素成熟技术的基础上,21世纪初开发了风冷塔式造粒技术生产复合肥。介绍该技术的工艺流程、主要设备、技术要点(加入0.1%~2%调理剂降低料浆凝固点)和改进情况(尿液与固体磷钾肥在塔下制成混合料浆,比在塔上大大节省投资)。
Based on the urea prilling technology used to produce granular urea in the urea prilling tower, air-cooled tower granulation technology was developed for the production of compound fertilizer in the early 21st century. The technical process of the technology, main equipment and technical points (0.1% ~ 2% conditioner is added to reduce the freezing point of the slurry) and the improvement (the mixture of urine and solid phosphorus and potassium fertilizer under the tower is greatly reduced than that on the tower investment).