供气式低压射流曝气器结构与运行参数对曝气器氧传质的影响
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摘要
供气式低压射流曝气氧传质影响因素的探究一直是污水处理领域的研究热点。射流曝气器的结构与其运行参数是影响射流曝气氧传质的重要因素。在5. 5 m水深条件下,对不同大小一级喷嘴直径的射流曝气器在不同运行参数条件下进行充氧性能评价。结果表明,随着运行气量的增加,射流曝气器的标准氧转移效率(SOTE)减少;随着循环水量增加,射流曝气器的SOTE随之增加;随着供气式低压射流曝气器一级喷嘴直径的增加,SOTE及理论动力效率(SAE)随之减小,而电耗随之增加。
Research on the impact factors of air-forced type low-pressure jet aeration oxygen mass transfer had received considerable attention in wastewater treatment field. The structure of the jet aerator and its operating parameters are important factors affecting the mass transfer of aerobic oxygen in the jet. The impacts through a pilot test using the aeration aerators with different nozzle sizes of different sizes at 5. 5 m water depth was studied. The results show that SOTE of jet aerator decreases with the increase of air flow rate,SOTE of jet aerator increases with the increase of circulating water rate,SOTE and SAE decrease with the increase of primary nozzle diameter and power consumption.
Research on the impact factors of air-forced type low-pressure jet aeration oxygen mass transfer had received considerable attention in wastewater treatment field. The structure of the jet aerator and its operating parameters are important factors affecting the mass transfer of aerobic oxygen in the jet. The impacts through a pilot test using the aeration aerators with different nozzle sizes of different sizes at 5. 5 m water depth was studied. The results show that SOTE of jet aerator decreases with the increase of air flow rate,SOTE of jet aerator increases with the increase of circulating water rate,SOTE and SAE decrease with the increase of primary nozzle diameter and power consumption.
引文
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13张建伟，刘思源，冯颖，等．多喷嘴撞击流混合器径向流场数值模拟研究[J]．沈阳化工大学学报，2017,31(1):50-55,90Zhang Jianwei,Liu Siyuan,Feng Ying,et al.Numerical simulation of radial flow field in multi-nozzle impinging stream mixer[J].Journal of Shenyang University of Chemical Technology,2017,31(1):50-55,90
14贾荣畅，刘颖，朱燕，等．微孔曝气器孔径与运行气量对微孔曝气氧传质的影响研究[J]．环境污染与防治，2015,37(8):75-79Jia Rongchang,Liu Ying,Zhu Yan,et al.Effects of pore diameter and air flow rate on oxygen mass transfer in fine pore aeration[J].Environmental Pollution&Control,2015,37(8):75-79
2 Reardon D J.Turning down the power[J].Civil Engineering,1995,65(8):54-56
3 Rosso D,Stenstrom M K.Surfactant effects on alpha-factors in aeration system[J].Water Research,2006,40(7):1397-1404
4 Havelka P,Linek V,Sinkule J,et al.Effect of the ejector configuration on the gas suction rate and gas hold-up in ejector loop reactors[J].Chemical Engineering Science,1997,52(11):1701-1713
5 Shukla B K,Goel A.Study on oxygen transfer by solid jet aerator with multiple openings[J].Engineering Science and Technology,an International Journal,2018,21(2):255-260
6 Weuster-Botz D,Altenbach-Rehm J,Hawrylenko A.Process-engineering characterization of small-scale bubble columns for microbial process development[J].Bioprocess&Biosystems Engineering,2001,24(1):3-11
7尚海涛．自吸式空心环流射流曝气器充氧性能研究(二)[D]．西安:西安建筑科技大学，2001Shang Haitao.A study on oxygen transfer performance of a corelesscyclic self-suction jet aerator[D].Xi'an:Xi'an University of Architecture and Technology,2001
8李鹏鹏．自吸式三支管射流曝气器数值模拟及试验研究[D]．杭州:浙江理工大学，2014Li Pengpeng.Numerical simulation and test of self-suction jet aerator with triple branch pipes[D].Hangzhou:Zhejiang Sci-Tech University,2014
9蒋林艳，卢义玉，王洁，等．射流曝气器最优喉嘴距的试验研究[J]．流体机械，2010,38(11):1-4,45Jiang Linyan,Lu Yiyu,Wang Jie,et al.Experimental study on optimal nozzle-to-throat clearance of jet aerator[J].Fluid Machinery,2010,38(11):1-4,45
10张佳晔．供气式低压射流曝气器的能耗分析及性能优化研究[D]．西安:陕西科技大学，2018Zhang Jiaye.Energy consumption analysis and performance optimization studies of air-forced type low-pressure jet aeration[D].Xi'an:Shaanxi University of Science&Technology,2018
11桑乐，罗勇，初广文，等．超重力场内气液传质强化研究进展[J]．化工学报，2015,66(1):14-31Sang Le,Luo Yong,Chu Guangwen,et al.Research progress of gasliquid mass transfer enhancement in high gravity field[J].CIESCJournal,2015,66(1):14-31
12张安龙，张佳晔，王先宝，等．基于三维数值模拟的供气式低压射流曝气装置性能优化研究[J]．环境污染与防治，2018,40(10):1152-1156,1197Zhang anlong,Zhang Jiaye,Wang Xianbao,et al.Purification of jet aerator with low pressure supply base on three-dimensional numerical simulation[J].Environmental Pollution&Control,2018,40(10):1152-1156,1197
13张建伟，刘思源，冯颖，等．多喷嘴撞击流混合器径向流场数值模拟研究[J]．沈阳化工大学学报，2017,31(1):50-55,90Zhang Jianwei,Liu Siyuan,Feng Ying,et al.Numerical simulation of radial flow field in multi-nozzle impinging stream mixer[J].Journal of Shenyang University of Chemical Technology,2017,31(1):50-55,90
14贾荣畅，刘颖，朱燕，等．微孔曝气器孔径与运行气量对微孔曝气氧传质的影响研究[J]．环境污染与防治，2015,37(8):75-79Jia Rongchang,Liu Ying,Zhu Yan,et al.Effects of pore diameter and air flow rate on oxygen mass transfer in fine pore aeration[J].Environmental Pollution&Control,2015,37(8):75-79