汽轮机冷端优化的研究

第36卷第1期热力透平Vol36No12007年3月THERMALTURBINEMar2007汽轮机冷端优化的研究赵斌1,刘玲2,张文兵3(1河北理工大学,河北唐山063009;2华北电力大学,北京102206;3东北电力大学,吉林132012):针对电厂汽轮机冷端优化分析问题,从凝汽器和循环水泵的整体角度出发,对冷端系统的运行特性进行优化,提出了一种基于热力学理论的确定凝汽器最佳真空和最佳循环水流量耦合性的分析方法;并应用该方法对某电厂一台300MW机组冷端系统的运行方式进行了验证,结果表明优化后机组经济性提高了0116%:汽轮机;冷端;凝汽器;循环水泵;优化:TK264.1:A:1672-5549(2007)01-0019-05OptimizationforSteamTurbineColdEndSystemZHAOBin1,LIULing2,ZHANGWenbing3(1HebeiPolytechnicUniversity,TangshanHebei063009,China;2NorthChinaElectricPowerUniversity,Beijing102206,China;3NortheastChinaElectricPowerUniversity,Jilin132012,China)Abstract:Fromviewofthecondenserandcirculationwaterpump,aimingattheproblemoftheturbinecoldendsystem,theoperationalfeatureofitscoldendsystemhasbeenoptimized,andananalyticalmethodisproposedbasedonthermodynamicstheorywhichisusedtodeterminecouplingcharacteristicbetweentheoptimizedvacuumandtheoptimizedcirculationwaterflow.Theoperatingmodeofa300MWunitscoldendsysteminapowerplanthasbeenverifiedbyadoptingthismethodand,theresultsshowthattheeconomyofunitsisincreasedby0116%afteroptimizationKeywords:steamturbine;coldendsystem;condenser;circulationwaterpump;optimization0,,,,300MW,,,,,,,111,:,,:2006-07-18:(:05212166):(1968-),,,,,,(),;24:,,:,,,:,,,(),(),,;(),,,,,12,,,,;,,();2211N300-167/538/538300MW1667MPa538401MPa538(2!50%)+1!50%911t/h300MW79549kJ/kW∀h491kPa22N71650,22N-71650-1315770m200539MPa54667t/h2m/s20(!!)15170!9500!11697mm:KDV150331,20汽轮机冷端优化的研究,,;,#∃#∃,,,(),,,,32,,,;,,,,,,,,,,,,,,,,33331凝汽器最佳真空和最佳循环水流量,,,,,:,,,,,,,()1,,Dc,tw1,,,,,P,Pp,Pnet=P-Pp11,PnetDw,a,,xaDwopbpcop,c,,cpclim21第1期热力透平332最佳循环水流量确定方法,,:,,,tc,pc,,P,2%tw1min~tw1max,P=f(Dc,tw1),2%()2Pp=Pp1-Pp2,2%,P=f(Dc,tw1),,Dc=f(tw1),Pnet,,,,,Pnet,,,Pnet,Pnet0,,PPp,Pnet0Pnet0Dc=f(tw1),Pnet0Dc=f(tw1)B,Pnet0Dc=f(tw1)A2&,441411微增出力与机组背压的关系,,:NT=f1(N,Pk)NT∋∋∋,kWN∋∋∋,kWPk∋∋∋,kPa412凝汽器变工况特性,:Pk=f2(N,t,W)N∋∋∋,kWPk∋∋∋,kPat∋∋∋,W∋∋∋,m3/s413循环水泵耗功(),:Np=f3(W)Np∋∋∋,kW414最佳真空计算,,F(N,t,W)=NT-Np,F(N,t,W)W=0,f1(N,Pk)Pk∀PkW=NpW22汽轮机冷端优化的研究4211212t/h2981623480kW155278189kPa413454kPa-041kW-3844kW7338%0116,0116%5(1),,,,(2)(),,,(3)300MW:[1],,[J],2001,21(9):94~98[2][J],2002(2):18~20[3][M]:,1992(18),,,(2)B(665mm)2880~3090r/min,(3),:[1],[M]:,1985[2][M]:,1992∀∀引进型百万千瓦超超临界汽轮机文集19,#HMN∃#HMN∃11,(600),#600∃:12#HMN∃3416K,213,,180/,,P723第1期热力透平