催化裂化装置再生斜管优化设计

Optimal design of FCCU regenerated catalyst standpipe

对国内某催化裂化装置再生斜管的支撑方案进行了分析,详细阐述了支撑方案中支撑碟簧的选型设计,包括计算壳体壁温和两器系统各部分热膨胀值,并对设置碟簧前后的斜管两固定端受力进行了对比:膨胀节前后设置碟簧支撑比未设置时受力减少78%以上。同时也对再生斜管的衬里结构进行了分析,衬里的设置既要考虑到隔热,又要考虑到耐磨,并提出了确保衬里施工质量的措施。再生斜管优化设计后,该装置开车2 a,再生斜管运行良好,未出现振动及局部过热现象。

The supporting design of the regenerated catalyst standpipe was analyzed. The selection of the support disc spring was studied in detail including calculating the wall temperature, and the thermal expansion of different sections of the Reactor and Regenerator system and bow to select support disc spring. The stresses of two ends of standpipe before and after installation of the disc spring have been compared. The stresses of the support disc spring before and after expansiou joint had less 79% than no support disc spring. At the same time, the structure of lining of standpipe was analyzed. The construction of the lining of regenerator standpipe should be designed in consideration of not only thermal insulation but also anti-wearing. The measures to en- sure the quality of lining were proposed. After optimization of the design of regenerated catalyst standpipe, the unit has been running for 2 years without trouble of the standpipe. No vibration and overheating of the stand- pipe have ever occurred. It provides an effective basis for the long-term safe operation of the unit.