克劳斯燃烧炉花墙结构改进  

Structural Improvement of Checker Wall for Claus Reaction Furnace

作　　者：杨海洲 武锦涛[1] 胡大鹏[1] YANG Hai-zhou;WU Jin-tao;HU Da-peng(School of Chemical Machinery and Safety,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工机械与安全学院,辽宁大连116024

出　　处：《高校化学工程学报》2018年第5期1090-1096,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21406214)

摘　　要：燃烧炉的花墙结构有助于提高燃烧炉中硫的产率。为深入探究燃烧炉中花墙结构对反应物的流动、传热和反应速率的影响,针对扼流圈结构和花墙结构分别建立了燃烧炉的数学模型,应用Fluent对燃烧炉的混合燃烧情况进行数值模拟。采用realizablek-ε湍流模型和组分运输模型探究花墙结构的优势所在,并在此基础上,对花墙结构提出改进。结果表明,花墙结构与扼流圈结构相比,加强了气体的混合效果,延长了气体的停留时间,将硫的产率提升了1%。进一步研究表明花墙结构的位置以及其导流方式能够使燃烧炉炉膛温度稳定的区域在流动方向增大3m,并且使稳定后的炉膛温度提升23K,进一步延长气体的停留时间,使硫的产率提升7.6%。研究试图通过改进花墙结构来定制燃烧炉的内部流场以提高硫的产率,为克劳斯燃烧炉的优化设计提供理论依据。Checker wall of Claus furnace is useful in improving sulfur productivity. In order to explore the effects of checker wall on flow, heat transfer and reaction rate, mathematical models were established and numerical simulation of combustion in the furnace was studied by Fluent considering Claus furnaces with choke and checker wall, respectively. Advantages of checker wall were explored using realizable k-ε model and component transport equation, and improved checker wall was designed. Simulation results show that the checker wall can enhance gases mixing and hence increase the residence time of gases and improve sulfur productivity by 1%. Furthermore, the location and diversion procedure of checker wall can effectively extend the area of stable temperature by 3 m along the flow stream direction, and increase the stable temperature by 23 K, which enhances gas mixing and increase gas residence time, and sulfur productivity can increase by 7.6%. The flow field of the furnace is designed to increase sulfur productivity by improving the structure of checker wall, and theoretical basis is provided for optimizing checker wall structure design.

关 键 词：硫回收 克劳斯燃烧炉 花墙 数值模拟 

分 类 号：TQ465.92[化学工程—制药化工]