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1、摘要摘要火力发电厂中各类大型风机、水泵是最主要的耗电设备。这些设备长期连续运行并常常处于变负荷运行状态，风机风量的调整靠其入口的风门挡板来调节，效率低，造成巨大的能源浪费。本文针对包头第二热电厂的实际情况，详细搜集了厂内的耗能设备的数据资料，通过分析各项经济指标及完成情况，得出在节能技术改造时应重点针对电厂风机、水泵等辅机设备。分析了风机类设备调速的基本原理，对改造的节能效果进行了估算。通过对离心风机的结构和节能方法分析，比较了多种调速方法的特点，确定变频调速是引风机有效的技术节能手段，并提出设备变
2、频技术改造的具体方案。从引风机的节能原理出发，确定了对应的变频系统结构和参数。最后，给出了变频器操作流程和注意事项，并对改造前、后的效果进行了对比，证明采用变频调速控制方式将大大提高风机设备的运行效率，改善风机工况，达到了节能降耗、降低生产成本的目的，直接和间接经济效益十分明显。关键词：电厂，功率设备，引风机，变频调速，节能I摘要ABSTRACTVarioustypesoflargefansandpumpsarethemainpowerequipmentinthermalpowerplants.Lo
3、ng-termcontinuousoperationofthesedevicesandoftenrunningatvariableload,fanairvolumeadjustmentbytheentrancetothedamperbaffletoadjust,lowefficiency,resultinginhugewasteofenergy.Inthispaper,aimedattheactualsituationofBaotouIIThermalPowerPlant,firstly,theen
4、ergy-consumingequipmentshavebeendeterminedthroughcollectthedataoftheplantrunning.Induceddraftfans,pumpsandotherauxiliaryequipmentarethemainpower-consumingequipments,andanalysisandcompletionofvariouseconomicrenovationsshouldbefocusingonthesepowerequipme
5、nts.Thebasicspeedcontrolprinciplewasanalyzedofvariesfanequipments,andthetransformationoftheenergysavingswereestimated.Thestructureandenergysavingmeasureofthecentrifugalfanhavebeenanalyzed.Throughcomparingofcharacteristicsofavarietyofspeedcontrolmethods
6、,andthefrequencycontroltechnologyisdeterminedtheappropriateinduceddraftfanenergy-saving,anditisthespecificprogramsoftransformation.Fromtheprincipleofthefansenergysaving,thecorrespondingfrequencysystemstructureandparametersisdetermined.Finally,driveoper
7、ationalproceduresandprecautions,andthetransformationoftheformer,comparedtheeffectsofpost-showthatusingvariablefrequencycontrolmethodwillsignificantlyimprovetheefficiencyofwindturbineequipment.Utilizingfrequencycontrolspeedcanimprovethefanworkingconditi
8、ons,operationcostwasreducedandenergywaslargelysavedandtherewereobviousdirectandindirecteconomicbenefits.KEYWORDS:powerplant,powerequipment,induceddraftfan,frequencycontrol，energysavingII华北电力大学硕士学位论文原创性声明本人郑重声明：此处所提交的硕士学位论文《变频调速技术在引风机改造中
