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1、摘要摘要火力發(fā)電廠中各類大型風(fēng)機(jī)、水泵是最主要的耗電設(shè)備。這些設(shè)備長(zhǎng)期連續(xù)運(yùn)行并常常處于變負(fù)荷運(yùn)行狀態(tài)，風(fēng)機(jī)風(fēng)量的調(diào)整靠其入口的風(fēng)門擋板來調(diào)節(jié)，效率低，造成巨大的能源浪費(fèi)。本文針對(duì)包頭第二熱電廠的實(shí)際情況，詳細(xì)搜集了廠內(nèi)的耗能設(shè)備的數(shù)據(jù)資料，通過分析各項(xiàng)經(jīng)濟(jì)指標(biāo)及完成情況，得出在節(jié)能技術(shù)改造時(shí)應(yīng)重點(diǎn)針對(duì)電廠風(fēng)機(jī)、水泵等輔機(jī)設(shè)備。分析了風(fēng)機(jī)類設(shè)備調(diào)速的基本原理，對(duì)改造的節(jié)能效果進(jìn)行了估算。通過對(duì)離心風(fēng)機(jī)的結(jié)構(gòu)和節(jié)能方法分析，比較了多種調(diào)速方法的特點(diǎn)，確定變頻調(diào)速是引風(fēng)機(jī)有效的技術(shù)節(jié)能手段，并提出設(shè)備變
2、頻技術(shù)改造的具體方案。從引風(fēng)機(jī)的節(jié)能原理出發(fā)，確定了對(duì)應(yīng)的變頻系統(tǒng)結(jié)構(gòu)和參數(shù)。最后，給出了變頻器操作流程和注意事項(xiàng)，并對(duì)改造前、后的效果進(jìn)行了對(duì)比，證明采用變頻調(diào)速控制方式將大大提高風(fēng)機(jī)設(shè)備的運(yùn)行效率，改善風(fēng)機(jī)工況，達(dá)到了節(jié)能降耗、降低生產(chǎn)成本的目的，直接和間接經(jīng)濟(jì)效益十分明顯。關(guān)鍵詞：電廠，功率設(shè)備，引風(fēng)機(jī)，變頻調(diào)速，節(jié)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華北電力大學(xué)碩士學(xué)位論文原創(chuàng)性聲明本人鄭重聲明：此處所提交的碩士學(xué)位論文《變頻調(diào)速技術(shù)在引風(fēng)機(jī)改造中
