热端阈值问题换热网络设计与应用  

Design and Application of Heat Exchanger Network for a Hot-End Threshold Problem

作　　者：魏志强[1] 孙丽丽[1] 袁忠勋[1] 蒋荣兴[1] 

机构地区：[1]中国石化工程建设有限公司,北京100101

出　　处：《石油学报（石油加工）》2014年第4期748-755,共8页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：提出了确定热端阈值问题换热网络最大热集成热量的方法和考虑热集成的热端阈值问题换热网络的设计方法。确定最大热集成热量后,建议将热端阈值问题换热网络分为自匹配与热集成2个部分分别实施优化改进。对某催化裂化装置换热网络实施优化改进,改进后装置冷公用工程负荷减少约11.5%,同时增产3.8 MPa蒸汽约10.0t/h;或减少发生3.8MPa蒸汽约34.5t/h,提高常减压装置初底油换后温度约20℃,节约常减压装置燃料气约2.4t/h。考虑热集成的热端阈值问题换热网络设计方法可用于指导热端阈值问题换热网络的优化与改进工作。An approach to identify the maximum heat integration duty for hot-end threshold problems and the design method for such a heat exchanger network were proposed. When the maximum heat integration duty was identified for hot-end threshold problems, it was supposed that the heat exchanger network should be split into two parts, the self-match part and the heat integration part, to be designed or retrofitted, respectively. A heat exchanger network of a fluid catalytic cracking unit was conducted to demonstrate the performance of the proposed method. The results obtained indicated that the duty of the cold utility was decreased by 11.5%, and 3.8 MPa steam was increased by 10.0 t/h. Alternatively, 3.8 MPa steam was decreased by 34.5 t/h, and the final heat exchange temperature of the topped oil in crude distillation unit was increased by 20℃, which led to the fuel gas consumed in crude distillation units decreased by 2.4 t/h. The proposed design method was effective to guide the optimization and retrofitting process of the heat exchanger network for hot-end threshold problem.

关 键 词：热端阈值问题 换热网络 设计 催化裂化 

分 类 号：TQ028.8[化学工程]