PCF型湿式脱硫除尘器入口结构优化  

Optimization of inlet structure for PCF wet desulfurization dust catcher

作　　者：肖育军[1,2] 李彩亭[1,2] 李珊红[1,2] 方鑫[1,2] 文青波[1,2] 范春贞[1,2] 郭官清 

机构地区：[1]湖南大学环境科学与工程学院,长沙410082 [2]环境生物与控制教育部重点实验室(湖南大学),长沙410082

出　　处：《环境工程学报》2013年第8期3105-3110,共6页Chinese Journal of Environmental Engineering

基　　金：国家高技术研究发展计划(863)项目(2011AA060803);国家自然科学基金资助项目(51108168)

摘　　要：以PCF型湿式脱硫除尘器为物理模型,利用Fluent软件包,采用RNGκ-ε湍流模型和SIMPLEC算法,对装置内三维流场进行数值模拟。模拟结果发现,原倾斜入口(A)的装置内烟气分布不均匀。提出了水平入口(B)、左入口(C)、右入口(D)3种优化结构,并分别对A、B、C、D入口装置内气流速度、湍流强度与压降进行了模拟分析。结果表明,C、D入口使装置内气流速度分布更加均匀,且增强了装置内湍流强度,但C入口会导致压降增加,因此最佳入口为D。最后,针对入口D装置中的低速区,模拟分析了30°、45°与54°3种不同切入角度,得出45°效果最佳。The three dimensional flow field of PCF wet desulfurization dust catcher was simulated using Fluent with RNGκ-ε turbulence model and the SIMPLEC algorithm.The result showed that the gas flow distributed unevenly in the original device with slant entrance（A）.Therefore,some alternative entrances such as horizontal entrance（B）,left entrance（C） and right entrance（D）were proposed to optimize this device.And then,the variation of velocity,turbulence intensity and pressure drop of these devices with A,B,C and D entrance were analyzed respectively.The results showed that the C and D entrance unified the velocity distribution of the gas flow and strengthened its turbulence intensity.But,the pressure drop of the device with C entrance increased remarkably.So the D entrance was the optimum choice.In the end,different angles（30°、45° and 54°） of D entrance were investigated for the low-speed area.And the entrance with 45° angle was the best.

关 键 词：PCF型湿式脱硫除尘器 入口结构 RNGκ-ε模型 数值模拟 

分 类 号：X701[环境科学与工程—环境工程]