分体式射流曝气器的试验研究

设计研制了一种新型的射流曝气器(也称分体式射流曝气器),提出了分体式设计的概念,它主要应用于小型和高浓度工业废水的实际处理工程中.在较宽的试验范围内着重研究了3个参数(长径比R₁、喉嘴比R₂和吸嘴比R₃)对吸气量的影响.结果表明:在较宽的喉嘴比范围内,吸气量存在波动,最佳喉嘴比出现的位置与混合管的长度有关;吸嘴比对吸气性能影响不大;长径比对吸气性能影响较大,最佳长径比可以在过渡区中寻找;试验结果同时也证实应用CFD数值仿真进行射流器的设计是可行的,本射流器的吸气量(900～1 100 L/min)和搅动范围均较大.

Experimental Research on Separate Structure Jet Aerator

A new type of jet aerator (separate structure jet aerator) was designed and developed, and an idea of separate design was put forth. This type of jet aerator was mainly applied to the treatment of small-scale wastewater and industrial wastewater of high density treatment projects. The experimental set-up was built to investigate the influences of the structural parameters (R1, R2 and R3) on the gas suction flowrate. The experimental results are listed as follows: the gas suction flowrate fluctuates with the changes of R2, and the optimal R2 is relevant to the length of the mixing tube; R3 does not contribute a lot to the suction performance, but choosing a suitable R3 can help to make further use of the gas suction potential of the jet aerator while keeping the other parameters unchanged; R1 has a great impact on the suction performance, and the optimal R1 can be found out in the transitional region. The experiments also prove that it is feasible to apply CFD to designing jet aerator, since its gas suction flowrate is high (reaching 900 approximately 1100 L/min) and it shows prominent performance in agitating liquid.