电厂循环冷却排污水的回用研究

71Vol.7,No.120061TechniquesandEquipmentforEnvironmentalPollutionControlJan.20061121(11,071003;21,050051),,,X703A100829241(2006)0120072204StudyonreuseofcirculatingcoolingsewagefrompowerplantsSuJinpo1YinLianqing1TanSuli2MoLiping1(11SchoolofEnvironmentalScienceandEngineering,NorthChinaElectricPowerUniversity,Baoding071003;21HebeiNo.4ConstructionEngineeringCompany,Shijiazhuang050051)AbstractApilotstudyonthereuseofcirculatingcoolingsewagefrompowerplantshasbeencarriedout.Ultrafiltrationandreverseosmosisprocesseswerecarriedouttotreatcirculatingcoolingsewage1Thetreatedwa2terqualityaccordswiththemake2upwaterofthelower2pressureboiler.Thistechnologycreatesanewwayfortheutilizationofeffluentcirculatingcoolingwater,whichsaveswaterresourcesanddecreasestheenvironmentalpol2lution.Keywordscirculatingcoolingsewage;reverseosmosis;ultrafiltration;wastewatertreatment:2004-06-07;:2005-04-16:(1974),,,,E2mail:[e-mail],,11000MW10t,1[1]70%80%,20%30%,,,,,,,,,,,,[2,3];,,,,11.111:(1),,;(2);(3),,Ca2+SO2-4HCO-3Sr2+中国城镇水网(mg/L)333.98PO3-4(mg/L)1.32K+(mg/L)6.65pH8.85Ca2+(mg/L)113.23(mmol/L)13.9Mg2+(mg/L)100.24(mg/L)1749.40Ba2+(mg/L)0.32(mg/L)1741.40Sr2+(mg/L)3.02(mg/L)8.2CL-(mg/L)315.00(mg/L)67.80SO2-4(mg/L)503.00(mg/L)5.52CO2-3(mg/L)75.00CODMn(mg/L)4.91HCO-3(mg/L)372.00(s/cm)2255NO-2(mg/L)0.011.2pH(SDI)22[4]Table2WaterqualityrequirementofvariousreversemembranesCTASDI15443(FTU)0.20.20.2(mg/L)0.10.10.1(mg/L)0.2100()252525(MPa)2.53.01.31.62.42.8pH562114111.31.3.1,1;HYDRAcap601;1,SDI12.54.5m3/hHYDRAcap6046m2,/:1.3/018mm150m,1Fig11Flowsheetofultrafiltrationtechnology2,HYDRAcap,3045min30min3.23.64.0t/h;45min410t/hpH7.07.51.3.2,,,,SDI15333Table3Resultofdirectultrafiltration(FTU)(mg/L)SDI1512/2723.80.110.140.051.211/0124.30.100.120.060.981/0516.30.080.010.040.891/1017.80.090.140.051.121/1518.90.100.150.061.0223,,SDI153,SDI15,2()(),,400mg/L,37中国城镇水网[5]2.1,1t/h(75%)22Fig12Flowsheetofreverseosmosissystem:(1),75%(2):,205m(3):(4)RO:RORO,LFCI24040,,,CaCO3CaSO4SrSO4BaSO4SiO2,,pH7.07.5,45mg/LPTP20100,2.21,,72%75%,99%;,120.070.09MPa,230.040.09MPa,PTP2010044,+,,25s/cm3,98%,,(14),3,4Table4OutletwaterqualityanalysisofreverseosmosisNa+(mg/L)4.02CO2(mg/L)1.03K+(mg/L)0.23SiO2(mg/L)0.61Ca2+(mg/L)0.30pH6.0Mg2+(mg/L)0.51(mmol/L)0106HCO-3(mg/L)3.01(mg/L)15.22SO2-4(mg/L)1.51(s/cm)20CL-(mg/L)4.1233.1:,,;,,5[6]5Table5Subsurfaceandsurfacewaterquality(mg/L)Ca2+Mg2+HCO-3(CaCO3)1382728749578.212.8317.2249181.132.911528.99.6128.911239.117.9162.017222.43.1775.36945,,,,,,,,3.2:GB157622001GB1214521996,6747中国城镇水网(2.5MPa)(mol/L)304000:M(1/2Ca2++1/2Mg2+)7Table7Middleandhighpressureboiler2feedqualitystandard(MPa)3.55.85.912.612.715.615.718.35.918.3(mol/L)3.02.02.000:M(1/2Ca2++1/2Mg2+)46,,[7]:(),,,,3.3:47,,,(EDI)(+),44.1,+,,:(1),(2)+,,(3)+4.2,,:(1),,,(2),,20s/cm,[1],,..,2001,6(57):1314[2],,..,2001,22(10):2629[3],,..,2004,5(7):7982[4],..:,2000[5]..,2000,20(2):1619[6]..:,2001[7]..,2001,22(3):444857中国城镇水网