垃圾焚烧半干法脱硫塔内流场数值计算  

NUMERICAL SIMULATION OF FLOW FIELD IN SEMI DRY FGD TOWER OF GARBAGE INCINERATOR

作　　者：李双双[1] 马晓茜[1] 余昭胜[1] 胡志锋[1] 李龙君[1] 

机构地区：[1]华南理工大学能源高效清洁利用广东普通高校重点实验室,广州510640

出　　处：《能源环境保护》2013年第5期24-29,共6页Energy Environmental Protection

基　　金：广东省自然科学基金

摘　　要：为给垃圾焚烧半干法脱硫塔优化设计提供理论基础,以某垃圾焚烧旋转喷雾半干法脱硫塔为研究对象,运用FLUENT软件对不同烟气入口旋转角工况下脱硫塔内部的流场分布以及加入旋转喷雾对速度场以及温度场的影响情况进行数值模拟分析。结果表明:随着入口旋转角度增大,烟气停留时间以及主要脱硫反应区域烟气湍流度增大,同时对塔壁冲刷加强,烟气分布均匀性降低。综合以上因素考虑,入口旋转角为20°时具有最有利于脱硫反应进行的流场分布。对入口旋转20°工况下加入喷雾后的流场进行了分析,其模拟结果与相关实验结论吻合较好,并能够兼顾高脱硫率以及后续设备的安全运行。In order to provide theoretical foundation for waste incineration semidry desulfurization tower＇s optimal design, taking a waste incineration rotating spray semidry desulfurization tower as an example, the method of computational fluid dynamics （CFD）is adopted to numerical simulate and analyze the influence of flow field in FGD tower at different rotational angles of entrance, as well as the velocity field and temperature field after added a rotating spray. Calculated results shows：with the inlet rotational angle increases,the gas residence time as well as the main desulfurization reaction zone flue gas turbulence intensity is increased, while the column wall scour strengthening gas distribution uniformity decreases. Integrated above factors,20° is the most conducive angle of entrance to the flow field desulfurization reaction distribution. Entrance rotated 20° conditions added to the spray after the flow field analysis, the simulation results are in good agreement with related experimental conclusions and be able to take into account the high desulfurization rate as well as follow-up to the safe operation of the equipment.

关 键 词：半干法脱硫 数值模拟 入口旋转角 流场 

分 类 号：X701.3[环境科学与工程—环境工程]