基于气泡雾化喷嘴的低能耗含油污水处理实验研究  

Experimental study on oily wastewater treatment with low energy consumption based on effervescent atomizer

作　　者：刘联胜[1] 屈惠茹 霍鑫鹏 李振祎 段润泽[1] 解珺 LIU Liansheng;QU Huiru;HUO Xinpeng;LI Zhenyi;DUAN Runze;XIE Jun(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401 [2]河北工业大学机械工程学院,天津300401

出　　处：《工业水处理》2024年第4期105-112,共8页Industrial Water Treatment

基　　金：天津市科技计划项目(19YFZCSF00850)。

摘　　要：微气泡气浮技术在低能耗下对含油污水的高效处理是目前的研究热点。利用气泡雾化喷嘴作为微气泡发生器,搭建了低能耗微气泡射流气浮处理含油污水的实验系统,系统研究了气液质量流量比(ALR)和工作压力(p)对微气泡群尺度分布特征和除油效果的影响,并计算了气泡雾化喷嘴的能耗。实验结果表明,利用气泡雾化喷嘴形成液下射流可以产生大量微气泡,其中尺度小于150μm的气泡数量占比在55%以上、小于600μm的气泡数量占比在98%以上;随着ALR的增加,微气泡数量整体呈现先增后减的变化趋势,最佳ALR=0.15;当p=0.2 MPa、ALR=0.15时,微气泡群的索特尔平均直径可降低至238μm,出水含油质量浓度为29.73 mg/L,微气泡射流气浮装置处理1 kg含油污水时能耗仅为6.53×10^(-4) kW·h,较溶气气浮能耗降低35%以上。The low energy consumption and efficient treatment of oily wastewater using microbubble flotation tech-nology is a current research hotspot.A low-energy microbubble jet flotation system for treating oily wastewater was established using an effervescent atomizer as a microbubble generator.The effects of air-liquid mass flow ratio(ALR)and working pressure(p)on the size distribution characteristics of microbubbles and de-oiling capacity were discussed,and the energy consumption of effervescent atomizer was analyzed.The experimental results showed that a large number of microbubbles could be generated by using the effervescent atomizer to organize submerged jet,the number of microbubbles with diameters less than 150µm accounted for more than 55%,and the number of micro-bubbles with diameters less than 600µm accounted for more than 98%.The number of microbubbles increased first and then decreased with the increase of ALR,and the optimum ALR was 0.15.When p was 0.2 MPa and ALR was 0.15,the Sauter mean diameter of microbubbles could be as low as 238µm,the oil concentration in wastewater was 29.73 mg/L,the power consumed by the microbubble jet flotation was only 6.53×10^(-4) kW·h per kilogram of wastewa-ter,which was more than 35%lower than dissolved air flotation.

关 键 词：低能耗 微气泡 射流气浮法 含油污水 气泡雾化喷嘴 

分 类 号：X703[环境科学与工程—环境工程]