Abstract:

The theoretical analysis is carried out from the load composition in each working condition, the forces acting on the side of the catalyst cooler and the side of the regenerator, the calculation of the thermal expansion and the calculation of the local stress under different working conditions. The actual type selection design of support spring for catalyst cooler of a domestic 3.0 MM TPY FCCU is carried out. After the type selection is completed according to this design, since the start-up of FCCU, the support spring of the catalyst cooler meets the requirements of relevant working conditions, which provides a guarantee for the long-term safe operation of the catalyst cooler and regenerator. The method can also be used for the type selection design of the support spring of the catalyst cooler of methanol to olefin and other similar units.

Key words: FCCU, catalyst cooler, support spring, type selection design, force analysis, thermal expansion, local stress

摘要：

从外取热器各工况的载荷组成、外取热器侧和再生器侧受力、热膨胀量计算、不同工况局部应力核算等方面进行了理论分析，对国内某3.0 Mt/a催化裂化装置外取热器支撑弹簧进行了实际选型设计。按此完成选型设计后，自开车运行以来，该装置外取热器支撑弹簧满足相关工况的要求，为外取热器和再生器的长周期安全运行提供了保障。该方法亦可用于甲醇制烯烃等类似装置的外取热器支撑弹簧的选型设计。

关键词: 催化裂化装置, 外取热器, 支撑弹簧, 选型设计, 受力分析, 热膨胀量, 局部应力