管式裂解炉辐射段的稳态和瞬态数值模拟  

Steady and transient simulation of radiation section in a tube cracking furnace

作　　者：张亮[1] 胡贵华[1] 李进龙[1] 钱锋[1] 

机构地区：[1]华东理工大学化工过程先进控制和优化技术教育部重点实验室,上海200237

出　　处：《计算机与应用化学》2013年第11期1244-1248,共5页Computers and Applied Chemistry

基　　金：国家重点基础研究发展项目(2012CB720500);国家自然科学基金项目(U1162202;21276078);国家高技术研究发展计划(863)资助项目(2013AA040701);上海市科技攻关项目(12dz1125100);上海市重点学科建设项目(B504)

摘　　要：本文采用Fluent软件对某裂解炉辐射段进行了数值模拟,计算中使用标准k-ε湍流模型、有限速率/涡耗散燃烧模型和离散坐标辐射模型,模拟结果与工厂数据一致。在此基础上,对辐射段进行了瞬态计算,模拟结果表明,烟气在炉膛中下段和炉顶拐角处形成回流,中下段回流有助于炉膛内对流换热,而炉顶拐角处回流使辐射段出现局部高温区:烟气循环有助于建立稳定的温度场;侧壁烧嘴使炉膛温度更为平均。本文模拟结果对裂解炉的设计和操作优化具有参考意义。Simulation for radiant section was carried out in an industrial tube cracking furnace with the computational fluid dynamics software Fluent. The standard k-ε turbulence model, finite rate/eddy-dissipation combustion model and discrete ordinates radiation model were used to model the fluid flow, combustion and radiant heat transfer, respectively. The simulation result was good agreement with industrial data. Based on the steady simulation, the transient numerical calculation of the firebox was carded out. From the simulation results, the flue gas recireulation at the middle height is benefit for the heat convection, while the recirculation at the comer of the top of the firebox make a local high-temperature zone appear in the radiation section. The flue gas circulation helps to build a stable temperature field. The side burners make the temperature profiles more uniform. The results could be meaningful for the optimization of design and operation of the cracking furnace.

关 键 词：计算流体力学 管式裂解炉 辐射段 瞬态模拟 稳态 

分 类 号：TQ221[化学工程—有机化工] TE963[石油与天然气工程—石油机械设备]