基于PIV技术的膜生物反应器内液相流场特性研究  

Hydrodynamic Characteristics of Liquid Phase Flow in MBR Based on PIV

作　　者：李春丽[1] 田瑞[1] 邢世录[1] 陶中兰[1] 文佳龙[1] 

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051

出　　处：《中国给水排水》2013年第5期85-89,共5页China Water & Wastewater

摘　　要：基于粒子图像测速(PIV)技术对膜生物反应器内气液两相流流动特性进行试验研究,在曝气孔径为4 mm、曝气强度为6.5 m3/h的条件下,分析得到距膜面不同位置处的液相流场数据,结果表明:越靠近曝气管的位置,液相速度矢量越大,随着远离曝气管位置,液相速度逐渐降低,在反应器边缘甚至出现了向下的液相速度矢量,C区中心线上5个激光断面的平均液相垂直速度分别为0.512、0.308 7、0.229、0.033和-0.018 m/s;分析激光断面1处反应器轴向各区域的液相速度矢量分布表明,A区域液相速度矢量较小,进入B、C区域液相速度逐渐增大且稳定,D区域液相速度矢量比较紊乱。该研究结果为膜生物反应器系统的优化设计提供了数据支持。The characteristics of gas-liquid two phase flow in membrane bioreactor （MBR） wereinvestigated using particle image velocimetry （PIV） technology. The data of liquid phase flow field at different locations on the membrane surface were analyzed at aeration pore diameter of 4 mm and aeration intensity of 6.5 m^3/h. The results showed that the liquid velocity vector was greater closer to the aeration tube. The liquid velocity was gradually reduced as the distance from the aeration tube was increased, and a downward liquid velocity vector even occurred at the reactor edge. The average liquid vertical velocities at five laser cross-sections along the center line of area C were 0. 512 m/s, 0.308 7 m/s, 0. 229 m/s, 0.033 m/s and -0.018 m/s, respectively. The liquid velocity vectors in axial areas at laser section 1 were analyzed. The liquid velocity vector was lower in area A, gradually increased and remained stable in areas B and C, and was in disorder in area D.

关 键 词：膜生物反应器 气液两相流 粒子图像技术 液相速度 

分 类 号：X703[环境科学与工程—环境工程]