0.5Mt/a重油催化裂化装置再生强化技术改造

Revamping for reinforced regeneration of a 500,000 TPY residue FCC Unit

中海石油中捷石化0.5 Mt/a重油催化裂化装置于2012年6月进行了强化再生技术改造并取得成功,通过在再生器密相床层内设置中国石油大学(北京)开发的Crosser强化格栅,强化了再生器床层内的气固相间接触,改善了主风沿床层横截面的均匀分布,实现了高效再生,装置多项技术指标均得到了显著的提升。改造后标定数据表明:再生器密相床层水平温差由15℃降低至3℃;稀相水平温差由37℃降低至2℃;原来存在的稀相尾燃超温问题基本得到消除,CO助燃剂由此可以降低2/3;在原料质量变差、用风量降低约10.9%、再生器催化剂烧焦反应时间减少12%的不利前提下,再生剂碳质量分数仍可由0.10%降至0.06%。不仅降低了装置能耗,而且保证了催化剂活性不下降、装置产品分布不变差,并消除了再生器稀相设备超温的重大安全隐患,创造了可观的经济效益。

In June, 2006, a regeneration system was successfully revamped with intensified regeneration technology for a 500,000 TPY RFCC unit in CNOOC Zhongjie Petrochemical Co., Ltd. The installation of two-layer Crosser baffle developed by China University of Petroleum （Beijing） in the regenerator＇ s dense bed has intensified the contact between gas and solid in the regenerator bed, improved the uniformity of the cross- section air distribution, realized high-efficiency regeneration and improved a number of technical indexes of the unit. The performance tests showed that, lateral temperature difference decreased from 15 ℃ to 3 ℃ in the re- generator＇ s dense bed and from 37℃ to 2 ℃in the regenerator＇ s dilute bed. The previous afterburniug and temperature over-run problems were eliminated after revamp, resulting in 2/3 saving of the CO promoter. Un- der the conditions of degraded feedstock, 10.9% reduction in air supply and 12% reduction in catalyst regen- eration time, the carbon on the regenerated catalyst decreased from 0.10% to 0.06%. The energy consump- tion of the unit was reduced, the catalyst activity was guaranteed and product distribution was maintained. In addition, the safety hazard of excessive temperature of equipment of dilute bed of regenerator was eliminated and remarkable economic benefits were achieved.