AAO氧化沟流态特性研究及积泥分析李柏林

第33卷第1期土木建筑与环境工程Vol.33No.12011年2月JournalofCivil,Architectural&EnvironmentalEngineeringFeb.2011A/A/O李柏林1a,1b,张　智1a,1b,刘少武2,卢昌松2,柴华1a,1b,王维忠2,袁相贵2(1.重庆大学a.城市建设与环境工程学院;b.三峡库区生态环境教育部重点实验室,重庆400045;2.重庆水务集团股份有限公司,重庆400015):2010-06-25:“”(2009ZX07315-002-01);(CDJXS11210001):(1983-),,,,(E-mail)[e-mail]。(),,,,(E-mail)[e-mail]。　:为了探求氧化沟内流速分布规律,解决积泥问题并实现系统能量的优化配置,以重庆市某污水处理厂的A/A/O氧化沟为试验平台,根据曝气转盘及水下推流器的不同组合方式设计了3种试验工况,重点对氧化沟外沟大弯段处的流速分布进行了测试及分析。结果表明:第1沟段下部流速过大容易造成能量浪费,间歇开/停水下推流器可以优化系统的能量配置;第2沟段水力情况复杂,外侧流速高、内侧流速低,形成了明显的滞水区,造成了内侧部分区域积泥;提出了解决积泥问题的措施,即在第2沟段的弯道处加设偏心导流墙、调整水下推流器的位置。:氧化沟;流态;积泥;节能降耗:X703.1　　:A　　:1674-4764(2011)01-0118-06SludgeDepositionAnalysisandFlowPatternTestonOxidationDitchIntegratedA/A/OTechniqueLIBo-lin1a,1b,ZHANGZhi1a,1b,LIUShao-wu2,LUChang-song2,CHAIHua1a,1b,WANGWei-zhong2,YUANXiang-gui2(1a.CollegeofUrbanConstructionandEnvironmentalEngineering;1b.KeyLaboratoryofThreeReserviorRegion'sEco-Enviroment,MinistryofEducation,ChongqingUniversity,Chongqing400045,P.R.China;2.ChongqingWaterGroupCo.Ltd.,Chongqing400015,P.R.China)Abstract:Tostudythevelocitydistributionrule,thesludgedepositionandtheenergy-optimizeddistributionoftheoxidationditch,theexperimentwasprocessedinaWWTPwithA/A/OOxidationDitchtechnology.Thestudyindividuallyfocusedonthevelocitydistributionofcurvedsectionsinout-ditchbytestingthreeoperationconditionsoftheOxidationDitch.Theresultshows:firstly,thevelocityofthefirstditchistoolarge;easilyleadtowasteofenergy,intermittenton/offsubmergedflowdriverscanoptimizetheenergydistributionofthesystem.Secondly,inthesecondditch,theflowpatternincrookditcheswereverycomplex,thereexistedhighvelocityoutsideandlowinside.Forsuchsituation,itiseasytocausesludgedepositintheinsideoftheditch.Finally,inordertoimprovetheproblemofsludgedeposition,themeasureswereputforwardasfollows:installingoff-centertrainingincurvedsectionsofthesecondditch,adjustingthepositionofsubmergedflowdriver.Keywords:OxidationDitch;flowpatterns;sludgedeposition;energysavingandconsumptionreduction　　,,,[1],[2]。,,,,,[3],。,,,,,。,。,,Littleton[4]、[5-6]、[7]、[8]、。[9-10]、[11]、[12]、Littleton[13]。,Carrousel。A/A/O,,,,。1　1.1　。A/A/O,Carrousel,,5,3,2,。3360m3,6m,4m。R1=6m,R2=12m。1。1　A/A/O/kW/(r·min-1)/kW/(r·min-1)18.5/2243/58318.54322.24221.2　1,1#5#1,4#5#2。2。LS45A,0.015m/s,,“-”。3,2。1　A/A/O2　2　13#、4#、5#1#、2#21#、2#3#、4#、5#1#、2#33#、4#,5#1#、2#119第1期李柏林,等:A/A/O氧化沟流态特性研究及积泥分析2　2.1　2.1.1　第1沟段流态特性分析　1。13。3,1、、,1#,1～4,,;,。3　1/(m·s-1)10.0520.0730.0700.3690.1160.1980.4010.2990.26520.2530.0440.1480.3040.1340.1020.3250.3800.29030.2980.1180.1980.1720.1290.1450.2780.2660.23840.0870.0770.0890.3180.2540.2910.3260.2530.23750.0880.0510.1290.2800.1350.1320.1770.2590.21160.0590.0470.0830.2720.0660.1700.2050.3390.38470.0270.0820.1430.1040.0900.1980.2000.3320.31080.0450.0360.0510.0790.1220.197-0.2740.330,,,1,,0.052～0.073m/s。45#,1,,0.077～0.089m/s。,、,,。,1#(2)7.5m,,。,,1#,,[2],1#3.5m,,,,,,。,、,0.102～0.369m/s,0.237～0.401m/s,(0.15m/s)[6]。,14,,0.098m/s0.026m/s。,1。2.1.2　第2沟段流态特性分析　24。,1,5#2,,、,,1。4　2/(m·s-1)10.0440.0610.0580.4300.1210.0810.1770.2470.25120.1170.0880.1010.2440.1230.1980.2350.3060.23030.1960.0950.1590.1900.1130.1850.1670.1290.15140.0890.0890.0700.1950.2090.2250.1630.2040.219120土木建筑与环境工程　　　　　　　　　　　　　　　　第33卷450.0560.0570.1730.2370.0460.0680.1730.2390.39460.0700.0610.0320.2260.0500.1970.2190.3040.41070.0830.0190.0900.1390.0720.0910.1530.2710.36680.0440.0240.0640.1000.0210.210-0.1490.291　　,[8,14],。5#,1,46,5#,2,、,7、8,,,78,。8,,,0.7～1.0m。2.2　2.2kW,13～14m,1#11m,,1(0.297m/s),(0.15m/s),。1,,1。2(1#),2。2,140.335m/s、0.326m/s、0.273m/s、0.277m/s,0.15m/s,1,21.93kW·h。,,12,1#,,,,。2.3　2.3.1　积泥原因分析　8,,78,,;,SS(SS250mg/L,2009450mg/L),,,8000mg/L(4000mg/L),,,。2.3.2　防止污泥沉积的改进措施　,,。1:5#(3,5),2,0.5m/s,8,,。5　3/(m·s-1)10.0480.0700.0750.3400.1740.1850.3900.3270.28820.2300.1070.1330.2000.1780.1200.3450.3350.29730.2830.1750.2000.1780.1300.1550.2880.2570.27340.0600.0610.1000.4050.2570.2500.3490.2710.21250.0480.0750.2550.2470.1440.1460.1820.2500.37860.0600.0550.1140.0720.0750.2210.3280.5230.54970.0390.0250.1580.0930.0540.3230.2150.4620.47080.0430.0790.2110.0960.1280.327-0.2410.440121第1期李柏林,等:A/A/O氧化沟流态特性研究及积泥分析　　22;32#;4,。24,。A/A/O,。Fluent。RNGk-ε,、,。,,(,,),。(),。,。33-5,,。2:2,。[15],,,,,,,。。3,,780.15m/s,,。3　23:2#78,8,,,8。4,,,。,(1.2m),78。4:2,78。5。,,0.203m/s,。4,4。4　35　43　1),12、、。2),122土木建筑与环境工程　　　　　　　　　　　　　　　　第33卷,,,。3)1,1#,1,,。4)27、8、,,8,0.7～1.0m。5),:2,2#78。:[1]THAKRESB,BHUYARLB,DESHMUKHSJ.Oxidationditchprocessusingcurvedbladerotorasaerator[J].InternationalJournalofEnvironmentScienceandTechnology,2009,6(1):113-122.[2].[M].:,2006:8-156.[3]WATEREnvironmentFederation.Designofmunicipalwastewatertreatmentplants[M].Virginia:Alexandria,1992.[4]LITTLETONHX,DAIGGERGT.Applicationofcomputationalfluiddynamicstoclosedloopbioreactors-Analysisofmacro-environmentvariationsinsimultaneousbiologicalnutrientremovalsystems[C]//ProceedingsoftheWaterEnvironmentFederation74thAnnualConference&ExpositiononWaterQualityandWastewaterTreatment,2001.[5],,.[J].,2007,29(3):106-109.　　YANGHUA-ZHAN,WANGTAO,DENGRONG-SEN.Researchonflowcharacteristico