尿素熔融喷浆造粒工艺生产高氮复混肥  

Technological features of urea melt spheroidizing(spraying granulation) process for production of high N compound fertilizer

作　　者：季保德 

机构地区：[1]临泉化工股份有限公司,安徽临泉236400

出　　处：《磷肥与复肥》2006年第1期61-62,共2页Phosphate & Compound Fertilizer

摘　　要：介绍在团粒法工艺的基础上，用尿素熔融成尿液或尿素车间二段蒸发器的尿液，采用喷浆造粒工艺生产W（N）25％～28％高氮复合肥的工艺要点：控制尿素用量占40％以下，尿液w[（NH2）2CO]≥99％；控制造粒w（H2O）≤2．5％；要求造粒物料温度≥60℃。改进干燥机内部结构．控制大风量低温干燥条件，4年的生产表明；工艺状况稳定，产品产量质量提高，消耗降低。Upon traditional granulation process, melted urea or concentratea urea solution from the evaporator is used to produce compound fertilizer with high N analysis of 25%～ 28% by spraying granulation： with the urea proportion under 40% and urea concentration w[CO（NH2）2]≥ 99%, granulation moisture w（H2O）≤2.5%, temperature≥60℃. The dryer is improved and operated at the heavy air and low temperature. The operation in the past 4 years shows the process a stable one, with a higher productivity, lower energy consumption and better quality.

关 键 词：尿素 熔融 喷浆造粒 高氮复混肥 

分 类 号：TQ444[化学工程—化学肥料工业]