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ID:15549603
大小:58.00 KB
页数:32页
时间:2018-08-04
《水污染控制工程 污水的物理处理(physical treatment of wastewater in water pollution control engineering)》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、水污染控制工程03污水的物理处理(Physicaltreatmentofwastewater03inwaterpollutioncontrolengineering)ThethirdchapteristhephysicaltreatmentofsewageSection1grillesandscreensThesecondsectionisthebasictheoryofsedimentationThirdidealsettlingtankFourthsectiongritchamberFifthsectionset
2、tlingtankSixthsectionregulatingtankSection1grillesandscreensSelecttheoriginalspacingofthegridbarsNocloggingofpumpandwaterProcessingequipmentattheplantandstation.Thegrilleismadeupofasetofparallelmetalbarsandframes,whichareinstalledattheinletofthewaterinletorthei
3、nletofthewatercollectingstationtointerceptthelargesuspendedparticlesandimpuritiesinthesewage.Effects:removethelargersuspendedmaterialthatmayclogthepumpunitandthepipevalve,andensurethenormaloperationofthesubsequenthandlingfacilities.Theamountofpollutantstrappedi
4、nthegrilleandtheconditionsofthearea,sewageditchesThetypeofthesystemisrelatedtothedischargeofthesewageandthespacingofthegridbars,Somedatathatcanbereferenced:Whenthebarspacingis16~25mm,thegateslagrejectionis0.10~0.05m3/(103m3sewage);Whenthebarspacingisabout40mm,t
5、hegateslagrejectionis0.03~0.01m3/(103m3sewage);Themoisturecontentofthegateslagisabout80%,andthedensityisabout960kg/m3.MethodforcleaningslagofgrilleGrillebarSectionshapeBypasschannelFlowvelocityofwaterSewagebarrierstripSpacingvelocityGrillebarSectionshapeBypassc
6、hannelFlowvelocityofwaterSewagebarrierstripSpacingvelocityGrillebarSectionshapeBypasschannelFlowvelocityofwaterSewagebarrierstripSpacingvelocityXGtyperotarygrillecleaningmachineRotarysolidliquidseparatorGLtypegrilledecontaminationmachineRaketypegrillecleaningma
7、chineFinegrilleofaerationgrittankDesignandcalculationofgratingCalculationofheadlossH2throughthegrille:Formula:H0-Calculationofheadloss,m;V-thevelocityofthesewagethroughthegrille,m/s;Zeta-dragcoefficient,thevalueandthegeometryofthebarsection;Placementangleoftheg
8、rille;G-gravitationalacceleration,m/s2;K-takingintoaccountthecoefficientofresistanceincreasewhenthegrilleisblockedbycontaminants,Available:k=3.36v-1.32,usuallyk=3.MunicipalS
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