二甲苯分离装置开工及运行分析

Start-up and operation analysis of xylene separation unit

介绍了中国石化塔河炼化有限责任公司0.52 Mt/a二甲苯分离装置开车和运行情况。通过增设临时流程,及时优化二甲苯塔恒温操作条件,二甲苯塔在无储备或外购C_8芳烃情况下平稳安全开工。对开工期间重整油分馏塔实际运行数据与设计数据偏差较大的问题做了分析,提出了解决方案。采用FHDO技术进行重整生成油脱烯烃处理,操作简便,芳烃损失较小,混合二甲苯溴指数下降明显。装置通过了100%负荷标定,混合二甲苯收率、装置能耗均优于设计值,混合二甲苯产品质量符合要求。

The start-up and operation of 0.52 MM TPY xylene separation unit in SINOPEC Tahe petrochemical Co.,Ltd.are introduced.By adding temporary process and optimizing the constant temperature operation of xylene tower in time,the xylene tower can start smoothly and safely without C 8 aromatics.The deviation between actual operation data and design data of the reformate fractionator during start-up period is analyzed,and the solution is put forward.The FHDO technology is used to remove olefins from the reformate.The operation is simple,the aromatics loss is small,and the bromine index of the mixed xylene decreases obviously.The unit has passed 100%load calibration,the yield of the mixed xylene and the energy consumption of the unit are better than the design value,and the quality of the mixed xylene meets the requirements.