Unsmooth catalyst transportation in the operation of the standpipe of the catalyst regen-erator in 0. 8 Mt/a FCC unit of PetroChina Karamay Petrochemical Complex was found. The driving pressure in the standpipe and the pressure drop of the slide valve were both lower than the designed re-quirement,resulting in fluctuation of reaction temperature in the riser. Compared the axial pressure dis-tribution in standpipe with the original design data,the results showed that no fluidized column was formed in the standpipe,and the pressure storage capacity is seriously insufficient due to the aeration ori-fices blockage and air rate insufficient,leading the catalyst bridging in the standpipe. By dredging the aeration orifices and adjusting the aeration rate,the conveying catalyst capacity of the standpipe can be improved to a certain extent.%中国石油克拉玛依石化公司0. 8 Mt/a催化裂化装置运行中出现了再生立管输送催化剂不畅的问题,表现为立管的推动力和滑阀的压降均低于设计值,同时提升管的反应温度发生波动变化.对比了再生立管轴向压力分布与原设计压力分布,结果表明,立管内没有形成流化料柱,蓄压能力严重不足,这是松动风点堵塞和松动风量不足造成的,使立管内部出现失流态化架桥等.通过疏通堵塞松动点,调整松动风量,在一定程度提高了立管的推动力.
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