催化裂化反应提升管新型预提升段的工业应用

COMMERCIAL APPLICATION OF NEW LIFTING ZONE IN FCC RISER

锦西炼油化工总厂采用洛阳石油化工工程公司的新型预提升段专利技术对Ⅱ套催化裂化装置反应提升管预提升段进行了改造 ,这是该专利技术的首次工业应用。新型预提升段设一套筒 ,预提升蒸汽在套筒内注入 ,底部注入流化蒸汽 ,在底部形成了一个小流化床。从初步考察可看出 ,改造后装置产品分布得到改善 ,同时解决了装置反应器旋风分离器料腿结焦严重、催化剂流化不好、再生催化剂斜管振动、催化剂循环量小等影响装置长周期运转的问题。仅产品分布改善一项得到的经济效益 (以加工量 0 .8Mt/a计 )每年就达到 913× 10 4 RMB $。提升段增设流化床层后 ,是否存在水热失活影响催化剂稳定性的现象 ,还有待考察。

The pre lifting zone in the riser of the II FCCU in Jinxi General Works of Petroleum Refining and Petrochemicals was revamped by using the new lifting zone patent technique developed by Luoyang Petrochemical Engineering Corporation.A casing was set in the new lifting zone,the pre lifting steam was injected through the casing and the fluidized steam injected at the bottom,thus a small fluidized bed was formed.After revamping,the product slate was improved and problems such as serious coking in the dipleg of the cyclone,bad fluidization of the catalyst,vibration of inclined tube for regenerated catalyst,small amount of circulation catalyst were solved.