摘要机组容量初步确定思路：发电厂容量确定后，汽轮机单机容量和台数即可以确定。大型电网中主力发电厂应优先选用大容量机组，最大机组容量宜取电力系统总容量的8%~10%，国外取4%~6％。我国超过25000MW容量的大电网有四个，都可装600MW及以上的大机组，但由于大型发电厂的厂址很不容易选到，燃料运输量大，供水量多，灰渣排放多等因素给厂址的选择带来很大困难。容量大的电力系统，应选用高效率的300MW、600MW机组。根据我国汽轮机现行规范，单机容量25MW供热机组、50MW以上凝汽式机组宜采用高参数，125~200MW凝汽式机组或供热抽汽机组宜采用超高参数，300MW、600MW凝汽式机组宜采用亚临界参数或超临界参数。本次设计是一次完全的火电厂动力部分设计首先，发电厂原则性热力系统的拟定与计算：包括给水回热和除氧系统、补充水系统、汽轮机和锅炉形式和参数的确定、回热系统参数的确定、加热器组的计算、汽轮机汽耗量及各项流量的计算和热经济指标的计算。其次，汽轮机部分辅助设备的选择：包括给水泵的选择、凝结水泵的选择及循环水泵的选择。第三，对锅炉燃料及其辅助设备的选择：锅炉燃料选择烟煤，根据煤的成分分析并选择磨煤机、送风机和引风机及其锅炉效率的校核。关键词：汽轮机锅炉热力系统AbstractAbstractunitcapacitypreliminarydefinitementality:Afterstationcapacitydetermination,thesteamturbineunitcapacityandtheTaiwannumbernamelymaydetermine.Inthelarge-scaleelectricalnetworkthemainforcepowerplantshouldfirstselectthelargecapacityunit,thebiggestunitcapacitytakestheelectricalpowersystemaggregatecapacitysuitably8%~10%,overseastakes4%~6%.Ourcountrysurpassesthe25000MWcapacitythebigelectricalnetworktohavefour,mayinstall600MWandtheabovebigunit,butbecausethelarge-scalepowerplant'sfactorysiteisnotveryeasytoelect,thefuelfreightvolumeisbig,thevolumeofdiversionaremany,theashdregsdischargesandsoonfactorstobringtheverymajordifficultymanyforthefactorysitechoice.Thecapacitybigelectricalpowersystem,usesthehighefficiencyelected300MW,the600MWunit.Accordingtoourcountrysteamturbinepresentstandard,abovetheunitcapacity25MWheatingunit,50MWthecondensationtypeunitusesthehighparametersuitably,the125~200MWcondensationtypeuniteitherheatingpullsoutthesteamunittousethesuperelevationparametersuitably,300MW,the600MWcondensationtypeunitusesthesubcriticalparameterorthesupercriticalparametersuitably.thisdesignisacompletethermoelectricpowerstationpowersectiondesign:first,powerplantprincipledthermodynamicsystem'ssketchwithcalculates:includingandeliminatestheoxygensystem,thesupplementaqueoussystem,thesteamturbineandtheboilerformandtheparameterdetermination,theregenerativesystemparameterdetermination,theheatergroup'scomputation,thesteamturbinesteam-consumptionandeachcurrentcapacitycomputationandthehoteconomicindicatorcomputationforthewaterregeneration.next,steamturbinepartsupportingfacility'schoice:includingfeedpump'schoice,condenserpump'schoiceandcirculatingwaterpump'schoice.third,toleroilandsupportingfacility'schoice:theleroilchoosestheYimabituminouscoal,analyzesandchoosesthepulverizer,theairfeederandthedrawingfanandtheefficiencyofboilerexaminationaccordingtothecoalingredient.Keyword:turbineboilerheatingpowersystem目录前言……………………………………………………………………………………………1第一章概述………………………………………………………………………………2第一节本次设计的相关数据资料……………………………………..………..……2第二节汽轮机设备确定……………………………………………………………….5第三节锅炉设备确定………………………………………………………………….6第二章原则性热力系统的拟定...
