调峰工况下汽轮机组滑压运行研究

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1、调峰工况下汽轮机组滑压运行研究重庆大学硕士学位论文（专业学位）学生姓名：熊帅敏指导教师：唐胜利教授学位类别：工程硕士（动力工程领域）重庆大学动力工程学院二O一五年四月TheSlidingPressureInvestigationofTurbineUnitsunderPeakingOperationAThesisSubmittedtoChongqingUniversityinPartialFulfillmentoftheRequirementfortheProfessionalDegreeByXiongShuaiminSupervisedby

2、Prof.TangShengliSpecialty:ME(PowerEngineeringField)CollegeofPowerEngineeringofChongqingUniversity,Chongqing,ChinaApril,2015中文摘要摘要在汽轮机组变工况时，选择合理的运行方式是提高机组效率的有效途径之一，为最大程度的保障汽轮机组经济性，本文采用理论与试验相结合的手段，研究调峰汽轮机组在线寻优的可行性和方法。通过理论计算得到汽轮机组的调节级特性曲线，并以此调节级特性曲线为依据，分析调节级主蒸汽可行压力区间，并考虑了调节级温

3、度变化和调节阀重叠度对主蒸汽压力的影响。最后以可行压力区间为依据对滑压运行优化试验提供理论指导，选定试验工况（350MW、400MW、450MW、500MW、550MW）进行滑压运行试验，通过热力计算得到相应的经济性指示（汽耗、热耗、高压缸效率、中压缸效率），得到了新的滑压运行指导曲线。分析表明，采用新的滑压运行方式，汽轮机组供电煤耗降低约2g/(kW·h)，具有较好的经济效益。关键词：汽轮机组，滑压，调节级，主蒸汽压力I英文摘要ABSTRACTTheselectionofareasonableoperationofturbineunits

4、isasignificantmethodtoimproveefficiencywhenturbineunitschangeloads.Theoryiscombinedwithpracticeinthispaperintheresearchofthefeasibilityandmethodofoptimizationforturbineunitsinordertoenhanceeconomicperformanceextremely.Accordingtocharacteristiccurveofgoverningstagecalculate

5、dtheoretically,therangeofmainsteampressurecanbegained,temperaturechangesingoverningstageanddegreeofoverlapinregulatingvalveareconsidereddeliberatelyaswell.Basedonwhich,anewguidingcurveandcoordinatedeconomicindexincludingheatconsumption,Steamconsumption,highpressurecylinder

6、efficiency,mediumpressurecylinderefficiency,canbeconcludedunderatestofoptimizationinslidingpressureoperationinapowerplantinvariouschosenworkingconditions(350MW、400MW、450MW、500MW、550MW).Duringtheresearchandcalculation,ingeneral,theresultrevealsthattheconsumptionofcoalisredu

7、cedby2g/(kW·h)attributingtotheguidanceofthenewguidingcurve,whichleadstoaremarkableeconomicbenefit.KeyWords:Turbineunit,slidingpressure,governingstage,pressureofmainsteamIII目录目录中文摘要.............................................................................................

8、.............................................I英文摘要.......................................