摘要
针对广东石化有限责任公司300万t/a连续重整装置投产后,催化剂再生单元运行中出现烧焦气体流通率持续下降、催化剂粉尘量增大、再生器烧焦床温分布不均匀、催化剂循环不畅等问题进行原因分析,并提出相应的解决措施。结果表明:上述问题主要是由于氯吸附罐罐底低温部位及下料管线入口结盐、催化剂再生烧焦局部超温造成结块、再生器频繁停车造成约翰逊网内网开裂破损、掺炼高终馏点和高含硫原料导致催化剂结焦和硫中毒、重整原料系统含水量高影响催化剂性能等因素造成,可通过采取清理再生器筛网、催化剂密度分离、增设氯吸附罐伴热设备、严格控制重整原料终馏点和杂质含量等措施得以有效解决,保证装置长周期生产运行。
After running of 3 Mt/a continuous reforming unit at Guangdong Petrochemical Co Ltd,various problems were observed in operation of catalyst regeneration unit,including a continuous decline in the flow rate of coking gases,increased catalyst dust,uneven temperature distribution in the regenerator′s coking bed,and poor catalyst circulation.The causes were analyzed and corresponding solutions were proposed.The results showed that above problems were mainly caused by factors such as salt formation at the low-temperature areas of the chloride adsorption tank bottom and the inlet of discharge pipeline,local overheating during catalyst regeneration caused by agglomeration,frequent shutdowns of the regenerator leading to internal mesh cracking of Johnson screen,blending of feedstock with high final boiling points and high sulfur content causing catalyst coking and sulfur poisoning,and high water content in the reforming feedstock affecting catalyst performance.These could be effectively resolved by measures such as cleaning the regenerator screens,separating catalyst density,adding heat tracing equipment for the chloride adsorption tank,and strictly controlling the final boiling point and impurity content of the reforming feedstock,thereby ensuring long-term stable production operation of the unit.
作者
樊春江
杨立新
李长江
韦见中
宁晓威
FAN Chun-jiang;YANG Li-xin;LI Chang-jiang;WEI Jian-zhong;NING Xiao-wei(Lanzhou Chemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China;No.4 Refining Department,Guangdong Petrochemical Co Ltd,Jieyang 515200,China)
出处
《石化技术与应用》
2025年第3期222-225,共4页
Petrochemical Technology & Application
关键词
连续重整
催化剂
再生单元
烧焦
结盐
粉尘
continuous reforming
catalyst
regeneration unit
coking
salt formation
dust
