1.5Mt/a国产连续重整装置的设计特点与标定结果

Design Characteristics and Calibration Results of Domestically Developed 1.5Mt/a CCR Reforming Unit

扬子石化1.5Mt/a国产连续重整装置工程设计的主要特点:重整反应器的布置采用两两重叠式方案、扇形筒选用约翰逊网结构、采用新型无纵缝再生器内网、再生烟气采用固相脱氯方式、反应加热炉采用"二加二"箱式加热炉且两台锅炉共用一个汽包。装置首次投料开车成功,表明国产连续重整工艺技术和工程设计是成功的,主要技术经济指标超过或接近设计值:芳烃产率为74.57%,C6+液体收率为87.77%,纯氢产率为4.0%,催化剂积炭速率为69.45kg/h,催化剂粉尘量为1.7kg/d,装置能耗为71.63kg标油/t。对装置首次开车及正常运行中出现的扇形筒悬空、加热炉集合管恒力吊架位移超限、再生系统程控阀关不到位、再生循环气干燥效果差,以及重整氢增压机压力与转速不能实现串接控制、三反上部料斗过滤器偏小、脱庚烷塔进料管线内物料呈气液两相,导致塔进料波动较大等问题,提出了相应的解决措施。

In terms of engineering design ,Sinopec Yangzi Petrochemical Company＇s domestically developed 1.5Mt/a CCR reforming unit has the following characteristics：a two-reactor overlapping scheme is adopted for the layout of reforming reactors ;the Johnson Screen is used for the segment eylinder;a new type of longitudi- nal joint-free inner regenerator screen is introduced ;solid-phase dechlorinating method is used for regenerated flue gas;2＋2 box-type heating furnaces are used as reaction heating furnaces and the two boilers share a steam pocket.The unit was successfully put into use at first try.This suggests that the domestic CCR technol- ogy and engineering design are successful and that the main technical and economic indices exceed or are close to designed values：The yield of arene is 74.57%;the yield of C6＋ liquids is 87.77%;the yield of pure hydrogen is 4.0% ;the carbon deposition rate of catalyst is 69.45kg/h;the catalyst powder amount is 1.7kg/d; and the unit＇s energy consumption is 71.63kg of oil equivalent per ton.This article proposes countermeasures for a series of issues found in the unit ,including suspension of the segment cylinder when the unit was first put into operation and during normal operation ,overrun displacement of the constant hanger of the collecting tube of the heating furnace ,incomplete closure of the sequencing valve of the regenerating system ,poor effect of drying of regenerated circulating air ,inability to achieve cascade control of the pressure and rotating veloc- ity of the reformed hydrogen supercharger,excessively small filter of the upper hopper of No.3 reactor,and large fluctuations in feedstock of the heptane removing column due to the presence of gas and liquid phases in the feeding line