高压加氢裂化装置增产喷气燃料技术改造及实施效果

TECHNICAL REVAMPING OF HYDROCRACKING UNIT FOR INCREASING JET FUEL AND IMPLEMENTATION EFFECT

中国石化北京燕山分公司(简称北京燕山分公司)2.0 Mt/a高压加氢裂化装置第一生产周期采用RN-32/RHC-1组合催化剂,喷气燃料收率为19.39%,为增产喷气燃料第二生产周期更换为RN-32V/RHC-3组合催化剂,喷气燃料收率为29.71%,提高了约10百分点,但与设计值31.97%相差较大。针对上述问题,北京燕山分公司通过对催化剂性能和装置标定数据进行分析,发现主要是因为转化深度提高后装置低压分离系统和分馏系统能力不足,无法保证装置在高转化深度下运行以及喷气燃料彻底分离。因此,确定对高低压分离系统配套仪表和分馏系统塔盘内件进行相应改造。改造后,喷气燃料平均收率为30.67%,接近设计要求,达到增产喷气燃料的目的。

The jet fuel yield of hydrocracking unit with 2.0 Mt/a capacity of SINOPEC Yanshan Co. ,using RN-32/RHC-1 composite catalyst,was only 19.35% in the first cycle. To produce more jet fuel in the second cycle, the catalyst was replaced by RN-32V/RHC-3 catalyst system, resulting in 29.71% of jet fuel,still less than the design target of 31.97%. The catalyst performance and operation calibration data were then analyzed. The results found that the main reasons for lower yield of jet fuel were the ability shortages of low pressure separation system and product fractionating tower,leading to poor operation at high conversion rate and separation effect. In view of the above analysis,the controlling instrument of high and low pressure separation system and fractionation system tray were revamped. After revamping,the average yield of jet fuel reaches 30.67% ,close to the design requirement.