加氢空冷系统氯化铵沉积多场耦合模型及数值模拟  

Multi-Physical Field Coupling Models and Numerical Simulation of Ammonium Salt Deposition

作　　者：偶国富[1,2] 金浩哲[1] 曹晶[1] 谢浩平[1] 

机构地区：[1]浙江理工大学多相流沉积-冲蚀实验室,杭州310018 [2]杭州富如德科技有限公司,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2011年第6期881-885,共5页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金(50976106);浙江省自然科学基金重点项目(Z4080352);国家高科技研究发展计划(863计划)(2009AA04Z422)

摘　　要：通过分析铵盐在加氢空冷管束内的结晶沉积过程,构建流动场、温度场和浓度场耦合作用下的铵盐沉积计算模型,并结合有限元法对氯化铵盐的流动沉积过程进行了数值模拟。研究结果表明:铵盐流动沉积是一个多物理场耦合的过程,典型工况下加氢空冷系统中氯化铵最大沉积量位于距管束入口0.98 m处。该数值模拟方法可有效预测实际空冷器管束入口铵盐沉积失效危险区域。By analyzing the process of ammonium salt crystallization and deposition in hydroprocessing air cooler tubes, the ammonium salt deposition and mathematical models of the flow field, temperature field and concentration field coupling are established. A finite element method is used for the numerical simulation of ammonium chloride deposition process. Based on the study, the anthors suggest that the process of ammonium salt deposition may be affected by multi-physical field coupling. As the result of the simulation, the position with maxium deposition amount of ammonium salt is 0. 98m away from the tube entrance in the air cooler system. Compared with actual failure instances, this method can be used effectively in predicting the relative severity of ammonium salt corrosion in hydroprocessing air cooler tubes.

关 键 词：多场耦合 空冷管束 铵盐 沉积 数值模拟 

分 类 号：TQ026.5[化学工程]