鍋爐風(fēng)煙系統(tǒng)(包括空氣預(yù)熱器系統(tǒng))吹灰系統(tǒng)課件

煙風(fēng)系統(tǒng)概述FuelGasAndairSystemOverview引風(fēng)機(jī)5.2IDFan52.1引風(fēng)杋是維持爐膛負(fù)壓,保證爐膛內(nèi)平衡通風(fēng)的必不可少的設(shè)備。引風(fēng)機(jī)一般都采用低壓頭大流量的離心風(fēng)機(jī)。爐膛的平衡通風(fēng)是保證爐內(nèi)各受熱面熱量傳遞的必要條件?！?.2.1iDfanisaninevitableequipmenttokeepthefurnacenegativepressureandguaranteefurnacebalancedventilationidfanusuallyusescentrifugalfanwithLPandbigflow.thebalancedventilationisthenecessaryconditiontoguaranteefurnaceheattransferofvariousheatingsurfaces引風(fēng)機(jī)的聯(lián)鎖級(jí)別是最高的,除非是爐膛的負(fù)壓過(guò)低般不采用停用引風(fēng)機(jī)的作法。大容量機(jī)組的引風(fēng)機(jī)的轉(zhuǎn)速般在1000r/min左石有,且為了保證風(fēng)機(jī)的良好的調(diào)節(jié)特性,其調(diào)節(jié)方式都采用液力偶合器調(diào)節(jié)方式。Theinterlockstageofidfanisthehighest.Unlessthefurnacenegativepressureistoolow,theidfanwillnotbeshutdownIDFanTHREEPHASc。TOR4506漂出T103152-20kv夢(mèng)造/mn想[1[想地是什邑是a當(dāng)號(hào)JINANPOWEREQUIPMENTFACTONBearingLubricateDirectionBoardBearlacegrease:Replacingthedifferentgrease軸承添加、換脂提示牌非軸的調(diào)示超后號(hào)的高時(shí)時(shí)次風(fēng)機(jī)5.3Primaryairfan5.3.1次風(fēng)機(jī)送出的風(fēng)主要是進(jìn)入一次風(fēng)室通過(guò)布風(fēng)裝置(風(fēng)帽)進(jìn)入爐膛,使?fàn)t膛內(nèi)的床料流化。一次流化風(fēng)是爐內(nèi)熱量的主要傳遞和攜帶介質(zhì)。一次風(fēng)速的大小決定著床料的流化情況和爐內(nèi)床溫的調(diào)節(jié)情況。5.3.1Theairthatcomesfromprimaryairfanmainlyentersprimarychamber.Itwillenterfurnaceviaairdistributiondevice(aircap)tofluidizethebedmaterial.Primaryfluidizedairthemaintransferringandcarryingmediumforthefurnaceheat.Primaryairspeeddependsonthefluidizationconditionandfurnacebedtemperatureregulationcondition·一次風(fēng)還是點(diǎn)火風(fēng)機(jī)和播煤風(fēng)機(jī)的風(fēng)源,因此,一次風(fēng)的用量在循環(huán)流化床鍋爐中是蕞大的,占總風(fēng)量的65%以上。在循環(huán)流化床鍋爐的空氣預(yù)熱器的進(jìn)口的阻力是比較大的,在空氣預(yù)熱器的進(jìn)口煙道的振動(dòng)也是所有煙道中振動(dòng)中最大的。在此處一般都裝有導(dǎo)向裝置,以減小其振動(dòng),在運(yùn)行時(shí)也應(yīng)在不影響其流量的前提下盡量減小一次風(fēng)的壓頭。PrimaryairalsoistheairsupplyforigniterairfanandcoalblowingairfanthusprimaryairisthemostusedinCFbandittakesupover65%ofthetotalairquantity.TheairheaterinletresistanceofcFbiscomparedbigTheairheaterinletoscillationisthemaximumintheentirefluegasductguidedeviceisinstalledintheinlettodecreaseoscillationPrimaryairpressureheadshouldbedecreasedasmuchaspossibleinoperationunderthepremisethattheflowisnotaffected次風(fēng)還是點(diǎn)火風(fēng)機(jī)和播煤風(fēng)機(jī)的風(fēng)源,因此次風(fēng)的用量在循環(huán)流化床鍋爐中是最大的,點(diǎn)總風(fēng)量的65%以上。在循環(huán)流化床鍋爐的空氣預(yù)熱器的進(jìn)口的阻力是比較大的,在空氣預(yù)熱器的進(jìn)口煙道的振動(dòng)也是所有煙道中振動(dòng)中最大的。在此處一般都裝有導(dǎo)向裝置,以減小其振動(dòng),在運(yùn)行時(shí)也應(yīng)在不影響其流量的前提下盡量減小一次風(fēng)的壓買。PrimaryairalsoistheairsupplyforigniterairfanandcoalblowingairfanThus,primaryairisthemostusedinCFbandittakesupover65%ofthetotalairquantitytheairheaterinletresistanceofCFBiscomparedbig.Theairheaterinletoscillationisthemaximumintheentirefluegasduct.Guidedeviceisinstalledintheinlettodecreaseoscillation.Primaryairpressureheadshouldbedecreasedasmuchaspossibleinoperationunderthepremisethattheflowisnotaffected·二次風(fēng)機(jī)送出的風(fēng)經(jīng)空氣預(yù)熱器加熱后通過(guò)二次風(fēng)口進(jìn)入爐膛,參預(yù)爐內(nèi)的燃燒,達(dá)到助燃的作用。Theairsentbysecondaryairfanenterstofurnacethroughairheatertobeheat.Itsupportscombustioninfurnaceandachievescombustion-supportingfunction在爐膛的前后側(cè)布置有上下兩層的二次風(fēng)口,下二次風(fēng)口也是爐內(nèi)密相區(qū)和稀相區(qū)的分界標(biāo)志Therearetwolayersofairho