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1、第35卷第3期2014年6月電力與能源353摻燒劣質(zhì)煤對供電煤耗影響的分析顏雪琴(上海電力股份有限公司吳涇熱電廠,上海200241)摘要:燃煤機組摻燒劣質(zhì)煤,除了增加維護和維修成本外,還會影響鍋爐效率、蒸汽參數(shù)、輔機電耗等指標。為了定量分析摻燒劣質(zhì)煤對機組供電煤耗的影響,以12號機組不摻燒(全神木煤)工況為基準,340g/kWh達標煤耗為標桿,分別比對240、180、120Mw三種工況下?lián)綗淤|(zhì)煤的供電煤耗。試驗結(jié)果為:240Mw電負荷,摻燒劣質(zhì)煤后供電煤耗上升2.869g/kWh;180MW電負荷,摻燒劣質(zhì)煤后供電煤耗上升3.987g/kWh;120Mw電負荷,摻燒劣質(zhì)煤后供電煤
2、耗上升3.769g/kWh。為此建議:要控制好摻燒大混煤的煤量,可適當摻燒些褐煤等煤種來對沖;要盡量運行高位磨煤機,通過燃燒器擺角和風煙擋板進行調(diào)整,抬高再熱器出口溫度;要綜合考慮摻燒大混煤的比例。關(guān)鍵詞:摻燒劣質(zhì)煤;供電煤耗率;定量分析中圖分類號:TK227.1文獻標志碼:A文章編號:2095—1256(2014)03—0353—03AnalysisofMixedBurningInferiorCoalforPowerSupplyCoalConsumptionRateInfluenceYanXueqin(ShanghaiElectricPowerCo.,Ltd.,WujingThe
3、rmalPowerPlant,Shanghai200241,China)Abstract:Mixedburninginferiorcoalincoal—firedunitswillnotonlyincreasethecostofmaintenanceandre—pair,butalsoaffecttheindicatorsforefficiencyoftheboiler,steamparametersandauxiliarypowerconsump—tion.Toquantitativeanalysisofimpactonthepowersupplycoalconsumptiono
4、fworkingunitwhenmixedburninginferiorcoal,chooseworkingconditionofNo.12workingunit,whichdidntburninginferiorcoal(containsfullofShenmuCoa1)and340g/kWhforcoalconsumptionasabenchmark,tOrespectivelycomparedwiththepowersupplycoalconsumptionofmixedburninginferiorcoalunder240MW。180MW,120MWworkingcondi
5、tions.Thetestresultis:whenmixedburninginferiorcoal,powersupplycoalconsumptionrose2.869g/kWhfor240MWelectricalload.Powersupplycoalconsumptionrose3.987g/kWhfor180MWelectricalload.Powersupplycoalconsumptionrose3.769g/kWhfor120MWelectricalload.Thesuggestionsare:Controlthequantityofmixedburninginfe
6、riorcoa1.AppropriatetomixedburninglignitetOhedge,whichcanspecificallyreducetheimpactofriskaftermixedburninginferiorcoa1.TrytOrunhighlevelcoalpulveriz—er,andthroughadjustofburnerangularandspecificbaffletOraisetheoutlettemperatureofre-heater;Corn—prehensiveconsideroftheproportionofmixedburningin
7、feriorcoa1.Keywords:Mixedburninginferiorcoal;Coalconsumptionrateofpowersupply;Quantitativeanalysis燃煤電廠運行中的主要成本之一是燃料。為質(zhì)煤對供電煤耗影響的試驗。了降低煤炭成本,大多燃煤電廠都在摻燒劣質(zhì)煤,1試驗方案吳涇熱電廠也不例外。摻燒大混煤的比例在2o~3O。由于劣質(zhì)煤價低,煤炭成本有所降1)機組簡況12號燃煤機組的鍋爐系上海低,但是過熱器、再熱器、制粉系統(tǒng)等設(shè)備受