一起二氧化碳冻结引起的空分装置停车事故  

An ASU Shutdown Accident Caused By Carbon Dioxide Freezing

作　　者：李燕鹏 

机构地区：[1]中国空分设备有限公司,浙江杭州310051

出　　处：《冶金动力》2016年第4期23-25,共3页Metallurgical Power

摘　　要：介绍了一台28000 m^3/h空分装置由于主换热器堵塞引起的事故。对事故的原因从本装置预冷系统、纯化系统、机组冷却器、装置大加温过程和CO_2冻结的可能性及空分装置外其余系统的影响等方面进行了分析。最后得出了由于空压机入口处大气环境中CO_2含量的突然升高,导致CO_2从分子筛纯化器突破,冻结并堵塞主换热器,导致停车的结论,并针对此问题提出了解决方案。An accident caused by blocking in the main heat exchanger of a 28000 m^3/h air separator is introduced. The causes of the accident were analyzed from the aspects of pre-cooling system, purification system, coolers, deriming process, the possibility of CO_2 freezing and the effect of other systems besides ASU. It was concluded that a sudden increase of CO_2 content in the atmosphere at the entrance of the main air compressor caused CO_2 breaking through the molecular sieve purification device, freezing and blocking the main heat exchanger and finally led to ASU shutdown, based on which a solution was put forward.

关 键 词：二氧化碳 排放 冻结 堵塞 分子筛纯化器 主换热器 空分 

分 类 号：TB657.7[一般工业技术—制冷工程]