总结了国内外具有代表性的催化裂化取热技术和再生剂调温技术,同时针对外取热器运行过程中出现的取热负荷不足、床层流化性能差和换热管易破裂等问题,重点介绍了外取热器传热强化技术。总结发现,再生剂调温技术可实现高再生温度、高剂油比及高原料油预热温度的"三高"操作;外取热器传热强化技术可通过强化外取热器入口催化剂的均匀分布、换热管外壁处和床层内催化剂的流化性能来提高传热效率和取热负荷,保证外取热器的长周期运行。

Global typical heat removal technology for fluid catalytic cracking (FCC) and the temperature adjustment technology for regenerated catalyst are summarized.In the light of several problems in the operation process of external heat extractor,such as lower heat exchange load,poor fluidization performance of catalysts and frequent rupture of heat exchange tubes,the heat transfer enhancement technology for external heat extractor is mainly introduced.It is concluded that the temperature adjustment technology for regenerated catalyst can achieve high regeneration temperature,high ratio of catalyst to oil and high preheating temperature of raw oil.The heat transfer enhancement technology for external heat extractor can increase heat transfer efficiency and heat exchange load,and ensure a long-term operation through improving the evenly distribution of catalysts at the inlet area and strengthening the flow performance of catalysts near the heat exchange tubes as well as in the bed.