| 射流曝气技术在脱硫浆液氧化工艺中的应用 |
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| 引用本文： | 卢义玉,陆朝晖,王洁,蒋林艳,夏彬伟.射流曝气技术在脱硫浆液氧化工艺中的应用[J].重庆大学学报(自然科学版),2013,36(3):128-134. |
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| 作者姓名： | 卢义玉 陆朝晖 王洁 蒋林艳 夏彬伟 |
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| 作者单位： | 1. 重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆,400044
2. 重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆,400044 |
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| 基金项目： | 国家创新群体基金资助项目(50921063)；重庆市杰出青年基金资助项目(CSTC2009BA6047)；重庆市自然科学基金资助项目(CSTC2010BB6069) |
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| 摘 要： | 亚硫酸钙的氧化率是衡量高硫煤电厂石灰石/石膏湿法烟气脱硫工艺效率的重要指标.笔者采用集曝气与搅拌为一体的射流曝气技术实现石灰石/石膏湿法脱硫强制氧化以提高氧化率,研究了脱硫浆液射流曝气氧化工作原理.基于ANSYS CFX对脱硫浆液罐的内部流场进行数值模拟实验,确定了浆液混合搅拌效果较为理想的射流曝气器安装方式:将3个射流曝气器垂直于浆液罐壁均布在离浆液罐底部0.8m的平面上；并在重庆某环保公司进行现场应用实验,测定了在此安装方式下射流曝气器的吸气量,并采用碘量法测定了脱硫浆液中亚硫酸钙的氧化率,应用结果表明:射流曝气器吸气量总量为59.52 m3/h,满足浆液氧化需气量要求,且浆液经过射流氧化2h后,亚硫酸钙氧化率达87.6％.
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| 关 键 词： | 强制氧化 射流曝气 ANSYS CFX 数值模拟 亚硫酸钙氧化率 |
Investigation and application of jet aeration technology in the oxidation process of desulfurization slurry |
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| LU Yiyu,LU Chaohui,WANG Jie,JIANG Linyan and XIA Binwei.Investigation and application of jet aeration technology in the oxidation process of desulfurization slurry[J].Journal of Chongqing University(Natural Science Edition),2013,36(3):128-134. |
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| Authors: | LU Yiyu LU Chaohui WANG Jie JIANG Linyan and XIA Binwei |
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| Institution: | Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Hazard Control Engineering; State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seams, Chongqing University, Chongqing 400044, China;Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Hazard Control Engineering; State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seams, Chongqing University, Chongqing 400044, China;Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Hazard Control Engineering; State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seams, Chongqing University, Chongqing 400044, China;Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Hazard Control Engineering; State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seams, Chongqing University, Chongqing 400044, China;Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Hazard Control Engineering; State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seams, Chongqing University, Chongqing 400044, China |
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| Abstract: | The calcium sulfite oxidation rate is an important indicator to judge the efficiency of wet limestone/gypsum flue gas desulfurization process used by high-sulfur-coal power plant. Jet aeration technology which integrates aeration and stir into one apparatus is proposed to implement the forced oxidation of limestone/gypsum flue gas desulfurization in order to improve the oxidation rate. The working principle of jet aeration oxidation in desulfurization slurry is investigated. ANSYS CFX is used to simulate the flow field inside the desulfurization slurry tank and obtain the best installation method of jet aerator which makes the mixing and stirring effect of slurry ideal: 3 jet aerators are uniformly installed at the height of 0.8m up from the bottom of slurry tank with their axis perpendicular to the tank wall. The air suction flowrate of jet aerators is tested under the best installation method in the on-site application test of the X protection company of Chongqing. The oxidation rate of calcium sulfite in desulfurization slurry is also tested by using iodometric method. The results show that the total air suction flowrate of jet aerators is 59.52 m 3/h which meets the requirement of slurry oxidation air quantity and the oxidation rate of calcium sulfite in desulfurization slurry reaches 87.6% after two-hour oxidation by using jet aeration. |
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| Keywords: | forced oxidation jet aeration ANSYS CFX numerical simulation calcium sulfite oxidation rate |
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