芳烃联合装置节能改造效果分析  

Analysis of Effects of Revamping of Aromatic Combination Unit for Reducing Energy Consumption

作　　者：伍宝洲[1] 李艳[1] 

机构地区：[1]中国石化洛阳分公司,河南洛阳471012

出　　处：《中外能源》2010年第B12期47-50,共4页Sino-Global Energy

摘　　要：中国石化洛阳分公司芳烃联合装置节能优化改造项目,主要是采用新型塔板技术,对芳烃联合装置的8个塔器和加热炉余热回收系统进行改造。塔器改造主要是对8台塔器的内件进行更换,将原有塔板一对一更换为新型复合孔微型高效塔板;加热炉改造主要是将歧化加热炉、二甲苯塔重沸炉和异构化加热炉等4台加热炉的空气预热器,由热管式空气预热器整体更换为扰流子管+搪瓷管的重型空气预热器,改造后的空气预热器为两级、四程列管式空气预热器。从装置综合能耗标定结果来看,实施节能改造后,加热炉热效率提高到91%以上,排烟温度降至118℃,各塔热利用率有所提高,再沸量均有下降。芳烃联合装置的综合能耗达到301.31kg标油/t产品,比改造前的352.19kg标油/t产品,降低约50kg标油/t产品,节能效果显著,达到了预期目标。目前,节能设备运行平稳,产品质量合格。Sinopec Luoyang Company launched a technical revamping program aimed to raise the energy efficiency of its aromatic combination unit.The program involved the introduction of a new type of tower plant technology to upgrade the eight towers and the residual heat recovering system of the heaters of the aromatic unit.The upgrade of the towers mainly involved the replacement of components inside the eight towers.The original tower plates were all replaced with new types of efficient compound pore micro plates.The heater upgrade mainly involved the replacement of the hot-pipe air preheaters of four heaters（including a dismutation furnace,the reboiler of the xylene tower and an isomerization heater） with turbolator＋glass-lining pipe heavy-duty air preheaters.After the upgrade,the air preheaters were changed to two-stage,four-stroke tubular air preheaters.From the unit′s overall energy consumption calibration results,after the upgrade,the heaters′ heat efficiency was raised to over 91%,the temperature of flue gas discharged dropped to 118℃,the heat utilization rates of all towers rose and the evaporation discharge inside the reboiler dropped.The overall energy consumption of the aromatic combination unit now stands at 301.31kg of oil equivalent per ton of products,a decrease of about 50kg of oil equivalent over the 352.19kg of oil equivalent prior to the upgrade.The effects of this upgrade are considerable.The upgrade yielded the expected results.The operation of the energy-saving equipment is now very stable and the quality of products produced is satisfactory.

关 键 词：高效塔板 扰流子管 搪瓷管 复合微孔 塔器 加热炉 

分 类 号：TQ241.1[化学工程—有机化工]