粒状磷酸一铵(GMAP)开发生产技术总结

Sum-Up of Developing Production Technology of Granular Monoammonium Phosphate(GMAP)

介绍了100 kt/a磷酸二铵/复混肥（ DAP/NPK）装置开发生产粒状磷酸一铵（ GMAP）的工艺流程、生产控制、产品性能、管式反应器加转鼓氨化造粒技术以及产品的外观质量，分析了生产过程中出现的问题及采取的优化措施。优化后的工艺参数：洗涤液密度（1550±10） kg/m3，中和度0．40±0．05，造粒机出口物料中和度1．05～1．10，一次氨占总氨质量分数85％～90％，二次氨占总氨质量分数10％～15％，返料比（4～5）∶1，造粒温度110～115℃，干燥尾气温度90～95℃。

A description is given of the development of production granular monoammonium phosphate （ GMAP） using 100 kt/a diammonium phosphate/compound fertilizer （ DAP/NPK） unit, its process flow sheet, production control, properties of product, pipe reactor plus rotary drums ammoniation granulation technology and appearance quality of product, and it is analyzed of the problems appeared in production and optimization measures adopted . Process parameters after optimization are density of scrubbing solution （1 550 ±10） kg/m3, neutral degree 0.40 ±0.05, neutral degree of granular output material 1.05 -1.10, ammonia use quantity at first time 85% -90%, ammonia use quantity at second time 10% -15%, recycle ratio （ 4 -5 ）∶1, granulation temperature 110-115 ℃, and dry tail gas temperature 90-95 ℃.