Claus硫磺回收燃烧器旋流结构对反应特性影响研究  

Effect of Burner Swirl Structure on the Reaction Characteristics of Claus Sulfur Recovery Furnace

作　　者：苏毅[1] 匡建平[1] 刘思远[1] 陈斌[1] 张世程[1] 

机构地区：[1]中国船舶重工集团公司第七一一研究所,上海201108

出　　处：《广州化工》2015年第23期201-203,252,共4页GuangZhou Chemical Industry

摘　　要：针对某炼化厂硫磺炉炉内的燃烧特性进行了三维数值模拟。构建了炉膛的三维全尺寸模型,采用FLUENT软件进行求解。主要考察了硫磺燃烧器中空气旋流角度与酸性气体旋流角度差对硫磺炉炉内燃烧反应特性的影响。计算表明,针对该硫磺炉炉型,当旋流角度差值为+15°时,酸性气与空气在燃烧器出口附近具有较大的切向滑移速度,在流场边界处形成较强的湍流混合区域,两股气流混合的速率最快,沿炉膛轴向距离最短。旋流角度差值大于或小于该范围都将对燃烧工况造成不利的影响。在最佳结构下,燃烧产生的火焰长度短,炉膛后部温度均匀,生成的SO2组分浓度分布均匀,有利于SO2与H2S的进一步反应。计算结果为新型高效硫磺燃烧器的设计提供了理论依据。A numerical study of combustion characteristics in a Claus furnace was performed. A 3D full size furnace model was built and solved with FLUENT. The main purpose of this study was to investigate the effect of swirl angle difference between air and acid gas on the combustion and reaction performance. Results showed the specific Claus furnace of this study. When the value was between ＋ 15°,the slip velocity of air and acid gas was high at the exit of burner. A severe turbulent mixing area was formed at the fluid boundary,hence a fast blending speed was reached. An adverse effect will occur whether the angle difference was greater or smaller than this range. Under the optimum structure,the flame length was short,a uniform temperature could be formed and the SO2 concentration was well distributed. This was benefit for further reaction between SO2 and H2S. The results provided a good theoretical support for high efficiency Claus burner design.

关 键 词：Claus硫磺回收炉 燃烧器 旋流角度 火焰 反应 

分 类 号：TQ125.11[化学工程—无机化工]