新一代防结焦沉降器的开发及应用

DEVELOPMENT AND APPLICATION OF A NEW GENERATION ANTI COKING DISENGAGER

沉降器内部结构对反应油气的流动状况和停留时间起决定性作用,沉降器内油气平均停留时间越长,就越容易结焦。中国石化工程建设有限公司针对以中间基劣质原油为原料的催化裂化装置的沉降器结焦问题及防结焦技术进行了系统研究,开发了新一代防结焦沉降器并成功实现工业应用。新一代防结焦沉降器包括新一代全封闭旋流式快分系统、旋风分离系统升气管旋片和防焦蒸汽环等结构,可以大幅降低油气在沉降器内的停留时间,将油气限制在封闭罩内,防止油气弥散至沉降器内的其他空间,有效避免油气在沉降器内结焦,并且油剂分离效率高,油浆固含量显著降低,催化裂化装置运行周期延长。

The internal structure of the disengager plays a decisive role in the flow status and residence time of the reaction oil vapor inside the disengager.The longer average residence time of the oil vapor,the easier it is to coke.SINOPEC Engineering Incorporation has conducted systematic research on the coking problem and anti coking technology of disengager in fluid catalyst cracking(FCC)unit using inferior raw materials,and developed a new generation anti coking disengager,including a fully enclosed cyclone fast separation system,cyclone riser blades,and anti coking steam rings,which has been successfully applied.This disengager can significantly reduce the residence time of oil vapor in the disengager with restricting oil vapor within the closed enclosure to prevent oil vapor from spreading to other spaces inside the disengager,effectively prevent oil vapor from coking in the disengager,and the oil separation efficiency is high,the solid content of the slurry is significantly reduced,which can extend the operating cycle of FCC unit.