重油催化裂化装置挖潜增效的措施

针对青岛石油化工厂 1.0Mt/a重油催化裂化装置原料性质不稳定、负荷率低、部分主风放空、烟气轮机效率低等问题 ,提出了挖潜增效的措施 :①筛选原油种类 ,降低原油重金属含量和硫含量 ,使柴油达到清洁燃料产品新标准 ;②优化提升管操作 ,增加预提升干气量和雾化蒸汽量 ,用酸性水代替石脑油作终止剂 ;③加大催化剂置换速率 ,保证催化剂活性 ;④将不完全再生改为完全再生 ,提高烟气轮机效率 ;⑤更换为适当的小叶片烟气轮机转子 ,再生器压力改由双动滑阀控制 ;⑥对气压机组调优等。采取前两项措施后 ,在汽油辛烷值基本不变的情况下 ,轻质油收率提高了 1.2 9个百分点

MEASURES FOR TAPPING PRODUCTION POTENTIALS TO ENCHANCE EFFICIENCY OF RFCC UNIT

Measures for tapping production potentials to enhance efficiency of RFCC unit have been proposed in regard to the unstable feedstock properties, low load rate, partially discharged main-air and the low efficiency of flue gas expander in 20 000 b /d RFCC unit of Qingdao Petrochemical Plant. They are as follows:(1) Selecting proper crude and decreasing the heavy metal and sulfur contents in the crude to meet the clean flue specification of diesel. (2) Optimizing riser operation, increasing the amount of pre-rise dry gas and atomized stream, using acid water as the stopping agent instead of naphtha. (3) Quickening the catalyst altering rate to assure the catalyst activity. (4) Catalyst incomplete regeneration is replaced by complete regeneration, increasing the efficiency of flue gas expander. (5) Adopting more suitable small vane flue gas expander rotor, regenerator pressure is controlled by double disc slide valve. (6) Optimizing the adjustment of gas pressure unit. After the first two measures have been adopted, light oil yield has increased by 1.29 percent point with the same gasoline octane value.