中间再热机组再热前后抽汽供热方案研究

38120101Vol.38No.1Jan.2010,,(,210096):,;,,,,,,,,:;;;:(20060286033):(19832),,,:TK14:A:100129529(2010)0120118205ExtractionHeatingModesResearchbeforeandafterReheatingforIntermediateReheatingUnitQIANJin,WANGPei2hong,CAOZu2qing(SchoolofEnergyandEnvironment,SoutheastUniversity,Nanjing210096)Abstract:Firstlythenormalqualitativeanalysisbetweentwoextractionsheatingmodesbeforeandafterreheatingwasdevelopedrespectivelyinthispaper,whichresultedthesecondmodewasadvantaged.However,calculationresultsofquantitativeanalysisshowthatspraywaterflow,steamflowintointermediatecylinder,andeconomyofthetwomodesareidenticalcompletely.Thenblackboxanalysismethodwasappliedtoanalyzeanddemonstratethiscalculationre2sultabstractly,whichalsoindicatedthetwoextractionheatingmodesareequivalent.Thisconclusiondoesnotaimatacertainunitbuthasuniversalsignificance.Inaddition,otherproblemsinheatingmodesanalysisarealsodiscussedinthispaper,andthetechnicalfeasibilityofthemodesisstudied,whichprovidesgistforheatingalterationinpowerplants.Keywords:intermediatereheatingunit;extractionheating;spraywater;economy,,[126],,;,:,:,;,,[7],,1,,,,1,,,21,01192,:(1);(2);(3),;(4),;(5),,,2:,,;,,,,,33.1,,,Qrh=Dch1(hrh-hr1)=Djw1(hrh-hjw)(1)hr1,kJ/kg;Qrh,MJ/h;hjw,kJ/kg;hrh,kJ/kg(1),Djw1=Dch1(hrh-hr1)hrh-hjw(2),,,DI1=DR1+Djw1-Dch1(3)DI1,t/h;DR1,t/h;Djw1,t/h;Dch1;t/h(2),DI1=DR1(hrh-hjw)-Dch1(hch-hjw)hrh-hjw(4)3.2,,,,Djw2(hr1-hjw)=(Dch1-Djw2)(hrh-hr1)(5)Djw2=Dch1(hrh-hch)hrh-hjw(6)Djw2,t/h,DI2=DR1-(Dch1-Djw2)=DR1(hrh-hjw)-Dch1(hr1-hjw)hrh-hjw(7)DI2,t/h3.3,(2)(6),(4)(7):,4,,3:(Djw,hjw),(DR1,hR1,pR1,tR1),Qrh;:(Dch,hch),(DR2,hrh,pR2,tR2)01202010,38(1)3,:DjwDR2DR1+Djw=Dch+DR2(8)DR1hR1+Djwhjw+Qrh=DchhR1+DR2hrh(9),Djw=Dch(hrh-hR1)hrh-hjw(10)DR2=DR1+Djw-Dch=DR1(hrh-hjw)-Dch(hR1-hjw)hrh-hjw(11),,,,:,,,,,,55.1:,,,,,,;,;,,5.2,,,,,,,,,,,5.3,,,,50;,,,,,,50,;,,,50,5.3.1,,50,h50,0121(DH-Dch1)hR1+Djwhjw=(DH-Dch1+Djw)h50(2),50Dch1DH=1[1+hrh-hR1hR1-h50h50-hjwhrh-hjw](12)5.3.21300MW1)hrh/kJkghR1/kJkg-1tsu1)/h50/kJkg-1h30/kJkg-1hjw1/kJkg-1hjw2/kJkg-1ch1/%ch2/%ch3/%ch4/%TRL35393023.673.82959.22900.91202.4733.214.313.624.723.63543.43005.269.62953.52890.11152.8708.611.310.821.620.670%3546.82984.165.82943.92890.11085671.88.68.318.617.860%3524.32972.564.32936.92884.61044.3648.77.87.517.717.0:1)tsu;h5050;h3030;ch1,ch2,ch3,ch45030,4()300MW,,1,(,,,,),,50,,10%(ch1),75%,10%,,(ch2)30,,10%(ch3ch4),600MW:TRL,40.4,75%29.9,50%3150,,6,,,6.1,,,:1/4,,,,24,,,,,50,,,,,,6.2,,,,,,,,,,6.3(1)01222010,38(1),,,:,,,,,,,,(2),,,(3),,,,,,7(1),:,,,(2),(1/10),,,;,;,50,,;,:[1],,.N600MW[J].,2007(4):48249.[2],.300MW[J].,2007(1):51253.[3],.[J].,2008(4):12214.[4].[J].,2009(1):27231.[5],,,.50MW[J].,2003,29(4):4232426.[6].100MW[J].,2005,6(8):72275.[7],,,.600MW[J].,2008,50(4):2822284.:2009210226:2009200916,1000kV(57.36),1000kV;525,750kV(2.43),750kV();630,500kV(18.6),;20098,660kV1113,800kV(151.78);1224,3,800kV(92.84),,,()