悬浮载体对不同曝气器氧转移特性的影响研究  

Study on Effects of Suspended-carrier on Oxygen Transfer Efficiency of Different Aerator

作　　者：柏永生 梁国强 常江 王佳伟 白宇 蒋勇 BAI Yongsheng;LIANG Guoqiang;CHANG Jiang;WANG Jiaweiu;BAI Yu;JIANG Yongu(Center of Technology Development,Beijing Drainage Group Co.Ltd.,100022 Beijing,China;Beijing Engineering Research Center for Wastewater Reuse,100124Beijing,China)

机构地区：[1]北京城市排水集团科技研发中心,北京100022 [2]北京市污水资源化工程技术研究中心,北京100124

出　　处：《水处理技术》2020年第1期120-125,共6页Technology of Water Treatment

摘　　要：以中试装置为研究对象,对比曝气器形式、通气量和悬浮载体填充率对曝气设备氧转移特性的影响。结果表明,微孔曝气器标准氧总转移系数(KLas)高于大孔曝气器;微孔与大孔曝气器的KLas随通气量的增加而提高,悬浮载体的增加有助于提高微孔曝气器的KLas,也可显著提高大孔曝气器的KLas。随着通气量增加或载体填充率的增大,微孔曝气器比标准氧转移效率(SSOTE)增大,优化通气量和填充率分别为≤40 m^3/h和≤40%;大孔曝气器的SSOTE显著增加,优化填充率为40%。随着通气量增加,微孔曝气器理论动力效率(Ep)保持不变或降低,且其通气量应≤32 m^3/h;而大孔曝气器Ep显著增加;二者优化填充率均为<40%。Using a pilot-scale test equipment as the study object,the effect of different aerators,aeration intensity and suspended-carrier filling rate on oxygen transfer efficiency were studied.The results showed that,the standard overall oxygen mass transfer coefficient(KLas)of micro-porous aerator was higher than that of large-porous aerator;and the of micro-and large-porous aerator increased with the increase of aeration intensity;the addition of suspended-carrier was beneficial to KLas,enhancement of micro-porous aerator,and could significantly increase the of large-porous aerator.Regarding the micro-porous aerator,the SSOTE gradually increased as the aeration intensity or suspended-carrier filling rate increasing,and the optimal aeration intensity and suspended-carrier filling rate were≤40 m^3/h and≤40%,respectively.Regarding the large-porous aerator,the SSOTE significantly increased and the optimal filling rate was 40%.The theoretical dynamic efficiency(Ep)of micro-porous aerator remained the same or decreased with the increase of aeration intensity,the aeration intensity should be less than 32 m^3/h;while the Ep of the large-porous aerator was obviously increased,the optimal filling rate of the micro-and large-porous aerator were both less than 40%.

关 键 词：曝气器 悬浮载体 填充率 氧总转移系数KLas 比标准氧转移效率 理论动力效率 

分 类 号：X703.1[环境科学与工程—环境工程]