喷雾半干法脱硫塔内射流卷吸特性的数值模拟  

Numerical Simulation of Entrainment by Jet Flow Characteristics in Spray Semi-dry Desulfurization Tower

作　　者：秦岭 丁红蕾 潘卫国 汪腊珍 丁承钢 郭士义 QIN Ling;DING Honglei;PAN Weiguo;WANG Lazhen;DING Chenggang;GUO Shiyi(College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Yangpu Distirct,Shanghai 200090,China;Shanghai Electric Power Station Environmental Protection Engineering Co.,Ltd.,Minhang Distirct,Shanghai 201600,China;Shanghai Environmental Protection Engineering Technology Research Center,Yangpu Distirct,Shanghai 200090,China)

机构地区：[1]上海电力学院能源与机械工程学院,上海市杨浦区200090 [2]上海发电环保工程技术研究中心,上海市杨浦区200090 [3]上海电气电站环保工程有限公司,上海市闵行区201600

出　　处：《发电技术》2018年第4期336-342,共7页Power Generation Technology

基　　金：上海市自然科学基金(14ZR1417800)~~

摘　　要：喷雾半干法烟气脱硫塔内射流卷吸特性对塔内烟气与吸收剂的混合以及流场分布均匀有着重要影响。该文通过数值模拟的方法,分析双流体雾化喷嘴的射流卷吸混合特性,得到喷雾半干法烟气脱硫塔内射流流场分布。结果表明:双流体雾化喷嘴在塔内流场呈现中间大两边小的对称分布,并且在靠近塔壁的两侧产生了回流;射流流体与周围气体发生动量交换,对周围气体有明显的卷吸作用,沿着射流轴线方向,射流卷吸量逐渐增加,随着伴随风量的增加,射流卷吸量也逐渐增加。The characteristics of entrainment by jet flow in the spray semi-dry flue gas desulphurization tower have an important influence on the mixing of the flue gas and the absorbent in the tower and the uniform distribution of the flow field.In this paper,the characteristics of entrainment by jet flow of the two-fluid atomizing nozzle are analyzed by numerical simulation method,and the jet flow field distribution in the spray semi-dry flue gas desulfurization tower is obtained.The results show that the jet flow field distribution of the two-fluid atomizing nozzle presents small on both sides of the middle and reflux occurs on both sides of the tower wall;the jet flow fluid exchanges momentum with the surrounding gas and have an obviously entrainment to the surrounding gas.The jet entrainment volume increases gradually along the jet axis direction and with the increase of the amount of wind,the entrainment volume of the jet also gradually increases.

关 键 词：喷雾脱硫 射流卷吸 流场 数值模拟 

分 类 号：X773[环境科学与工程—环境工程]