催化裂化装置反应-再生系统热平衡问题分析及对策  

Analysis andcountermeasures of heat balance in reaction regeneration system of FCC unit

作　　者：李铖 张荣 Li Cheng;Zhang Rong(Refinery&Petrochemical Company,Yanchang Petroleum(Group)Co.,Ltd.,Yanan 727406,Shaanxi,China)

机构地区：[1]陕西延长石油(集团)有限责任公司炼化公司,陕西延安727406

出　　处：《工业催化》2021年第7期57-61,共5页Industrial Catalysis

摘　　要：催化裂化反应为吸热反应,催化剂再生反应为放热反应,再生烧焦放出热量与反应吸热以及原料升温、热损失达到平衡状态,装置才能平稳运行。通过对某炼油厂1.2 Mt·a^(-1)催化裂化装置反应-再生系统热平衡进行分析,表明催化剂循环流化与外取热运行工况不稳定是造成反应再生系统热量难平衡的主要原因。提出对反应-再生器内构件、外取热等技术进行改造和优化。改造后,催化剂单耗降低0.24 kg·t^(-1),蒸气产量增加30 t·h^(-1),汽柴液总收率提高0.93%,实现装置平稳高效运行。The reaction process of catalytic cracking is endothermic,and the regeneration process of catalyst is exothermic.Only when the heat released from regeneration of coke is in balance with the endothermic reaction,the temperature rise of raw material and the heat loss of catalyst,the unit can run smoothly.Based on the analysis of the heat balance of the reaction regeneration system in a 1.2 Mt·a^(-1) FCC unit of a refinery,it is considered that the main factors which affect the heat balance of the reaction regeneration system are the instability of the catalyst circulating fluidization and external heat extraction.Units of reaction-regenerator and external heat extraction technique are improved and modified.After the revamping,the unit consumption of catalyst is reduced by 0.24 kg·t^(-1),the steam output is increased by 30 t·h^(-1),and the total yield of gasoline and diesel liquid is increased by 0.93%,realizing the stable and efficient operation of the unit.

关 键 词：石油化学工程 催化裂化 反应-再生 热量平衡 技术改造 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]