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在折流式厌氧反应器(Anaerobic Baffled Reactor,ABR)不同进水管悬空高度和不同进水流量组合的工况下,利用激光粒子图像测速技术(particle image velocimetry,PIV)对ABR的第一格室液相流态进行了研究,测得反应器内降流区和升流区关键截面的流场数据,获得了液相速度和涡量强度与悬空高度的关系曲线;同时研究了相关流场特征,包括流线图谱和涡量场。结果表明:对于ABR的第一格室,合理的进水管悬空高度可以保证良好的进水流态,促使ABR涡量面积分布均匀,有效防止局部沟流和液相死区,确保ABR高效稳定运行。根据试验分析结果,提出了设计时可供参考的进水管悬空高度的取值范围:流量在0.018~0.270 m3/h时,悬空高度的取值范围为230~530 mm;流量在0.558~0.846 m3/h时,悬空高度的取值为530 mm。
Under the combination of different height of inlet pipe and different influent flow rate in the anaerobic baffled reactor (ABR), the first grid of ABR was detected by particle image velocimetry (PIV) The flow field of the liquid phase in the reactor was studied. The flow field data of the key cross section in the downflow and upflow regions of the reactor were measured. The relationship between the liquid velocity and the vorticity intensity and the height of the vacancy was obtained. Features, including streamline maps and vorticity fields. The results show that for the first cell of ABR, a reasonable height of the inlet pipe can ensure a good influent flow state, promote uniform distribution of the vorticity area of ABR, effectively prevent local ditch flow and liquid dead zone, and ensure high and stable ABR operation. According to the result of the test, the range of suspended height of inlet pipe for design is proposed. When the flow rate is 0.018-0.270 m3 / h, the range of suspended height is 230-530 mm and the flow rate is 0.558-0.846 m3 / h, the dangling height is taken as 530 mm.