总流程协同优化下的催化裂化装置高效运行实践

PRACTICE AND ANALYSIS OF FCCU EFFICIENT OPERATION BASED ON SYNERGY OF REFINERY

提出并实践以协同优化为主要特征的催化裂化装置高效运行策略,主要通过原油分储分炼、常减压蒸馏-延迟焦化-蜡油加氢分馏协同运行,有效降低了催化裂化装置进料中的小于350℃馏分含量;在此基础上通过提高溶剂脱沥青装置和蜡油加氢装置负荷,提高催化裂化掺渣比,实现了催化裂化装置的高效利用;在重整和变压吸附氢气系统负荷增大的基础上实现了重柴油及催化裂化柴油不同形式的转化,降低了柴汽比;焦化装置在低负荷运行的同时也通过回收全厂轻烃及重油再分离得到新的定位。

Based on analysis of refinery total process,the whole strategy of FCCU efficient operation was discussed.By the separated storage and separated process of crude oil and the coordinated operation of crude distillation-delayed coking-hydrotreating of VGO,the<350℃diesel fraction in FCC feed can be reduced.The FCCU operation with high efficient was realized by increasing operation load of solvent deasphaltene and VGO hydrotreating-distillation process,as well as residue blending in FCC feed.Besides,HCO and LCO after hydrotreating can be converted to gasoline,thus the diesel gasoline ratio is reduced based on the increased load of reforming and H2PSA operation.At the same time,the coking unit operates under low load and obtains new function through the recycling of light hydrocarbon and heavy oil.