C型倒伞表面曝气机充氧性能试验研究  

Study on oxygen mass-transfer characteristics of a turbine surface aerator with vertical shaft

作　　者：王淦[1,2,3] 彭永臻[1,2] 侯红勋[3] 范奎[3] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124 [2]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124 [3]安徽国祯环保节能科技股份有限公司,安徽合肥230088

出　　处：《华中科技大学学报（自然科学版）》2013年第9期91-96,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2009AA063804)

摘　　要：以污水处理氧化沟工艺核心设备c型大功率倒伞表面曝气机为研究对象，利用大型表面曝气机性能试验水池，重点测试了叶轮浸没深度和叶轮的转速对表面曝气机相关性能指标的影响，借助Matlab软件对测试数据进行分析，建立了倒伞表面曝气设备充氧性能数学模型．研究结果发现：c型倒伞表面曝气机存在1个最佳动力效率工况点、1个次佳动力效率工况点和1个动力效率凹谷，最佳工况点叶轮浸没深度为283．5mm，叶轮转速为29．73r／rain（线速度5．06m／s）；C型倒伞表面曝气机的运行建议稳定在最佳工况点，如果工艺运行需要对曝气量进行调整，建议维持最佳液位不变，仅采用转速调整进行控制，叶轮转速建议控制在27．27～32．88r／min，即线速度4．64～5．59m／s，此运行区间内输人功率变化范围在81．3～131．4kW；最佳工况点输入功率为101．5kW，高效区最大输入功率为131．4kW．The aim of this study is to investigate the oxygen mass-transfer characteristics of a turbine surface aerator with vertical shaft. Full-scale test tank platform were used for this purpose. As a re- sult, a model was set up with the aid of Matlab. It has been found that there are a maximum power ef- ficiency point, a sub-maximum power efficiency point and a minimum power efficiency point for this type of surface aerator, and the submergence is 283.5 mm and the rotational speed is 29.73 r/min at the maximum power efficiency point. This result shows that it should be controlled at the maximum power efficiency point in operation, and the depth of immersion should be kept constant at the range of rotational speed from 27.27-32.88 r/min and input power from 81.3-131.4 kW for this aerator in some occasion so as to get high power efficiency in operation. The input power is 101.5 kW at the maximum power efficiency point, and the maximum input power is 131.4 kW in high power efficiency area.

关 键 词：表面曝气机 曝气 氧传质 动力效率 氧化沟 污水处理 

分 类 号：X703[环境科学与工程—环境工程]