连续催化重整装置脱烯烃汽提塔方案对比

SCHEME COMPARISON OF DEOLEFIN STRIPPING COLUMN IN CONTINUOUS CATALYTIC REFORMING UNIT

某石化企业现有一套800 kt a连续催化重整(简称重整)装置,原设计采用工业颗粒白土除去微量烯烃;现要新建一套1000 kt/a连续重整装置,采用加氢脱烯烃技术方案。为了将两套重整装置的分馏部分合并且最大限度利用已有的设备,加氢脱烯烃反应器需设置在脱C_(6)塔之前,区别于常规流程设置在脱戊烷塔之前,由此引发了是否需要设置脱烯烃汽提塔的问题。采用Aspen Plus流程模拟软件,对是否设置脱烯烃汽提塔进行了模拟计算,从能耗、一次性投资、操作成本等方面进行了对比。模拟计算结果表明:设置脱烯烃汽提塔流程可以避免因取消该流程所造成的物料放空损失;基于投资、成本和收入测算,设置脱烯烃汽提塔流程后年均营业收入远大于成本,投产后不到半年即可收回成本,项目预期效益良好。

A petrochemical company has a set of 800 kt/a continuous catalytic reforming(referred to as reforming)unit that uses industrial granular clay to remove trace olefin,but now a new set of 1000 kt/a continuous reforming unit will be built to adopt hydrodeolefin technology.In order to combine the fractionation parts of the two reforming units and to maximize the utilization of existing equipment,the hydrodeolefin reactor shall be located prior to the removing C_(6)column,as opposed to the conventional process located prior to the depentane column,therefore,it is necessary to set up a stripping column for the removal of olefin.Aspen Plus process simulation software was used to simulate whether to set up the stripping column for removing olefin,and the comparison was made from the aspects of energy consumption,one-time investment and operating cost.The simulation results indicated that adopting the process of the deolefin stripping column could avoid material emptying loss caused by canceling the process.Based on investment,cost and revenue calculations,after adopting the process of the olefin stripping column,the annual average operating revenue was much greater than the cost,and the cost could be recovered less than half a year after this part of the process was completed and put into operation.The project is expected to be good benefit.