CO_2汽提法尿素装置存在问题的分析及对策  

Analysis of Problems of Urea Unit Adopting Carbon Dioxide Stripping Process and Countermeasures

作　　者：廖容波 沈永伦 

机构地区：[1]北京众联盛化工工程有限公司,北京100101 [2]湖北三宁化工股份有限公司,湖北枝江443206

出　　处：《化肥工业》2017年第1期46-48,52,共4页Chemical Fertilizer Industry

摘　　要：介绍了采用中压分流技术改造后的二氧化碳汽提法尿素装置的运行状况,通过对运行中存在问题的分析和比较,找到汽提效率下降、甲铵液循环量低是造成尿素装置产量下降、中压系统甲铵液温度高、无法提高负荷的主要原因,并提出切合实际的解决方案和建议措施。改造后,尿素产量达到1 705 t/d,吨尿素氨耗降至572 kg,汽提效率达到80%以上。An introduction is given of operation conditions of urea unit adopting carbon dioxide stripping process after renovation with technology of medium pressure shunt, by analysis and comparison, it is found that drop of stripping efficiency and low circulating rate of ammonium carbamate solution are the main causes of decrease in production of urea unit, high temperature of ammonium carbamate solution of medium pressure system and unable to increases load, and practical solutions and recommended measures are suggested. After the revamp, urea production reaches to 1 705 t/d, the ammonia consumption per ton of urea reduces to 572 kg, stripping efficiency is higher than 80%.

关 键 词：二氧化碳汽提法 汽提效率 甲铵液浓度 

分 类 号：TQ441.41[化学工程—化学肥料工业]