鍋爐課程設(shè)計(jì)Excel表格

1、煙氣成分VRO2Nm3/kg1.0367V0N2Nm3/kg4.4483V0H2ONm3/kg0.5321Ifh=fh*Ay/100*(C)fhfh 溫溫度度(C)RO2(C)RO2IRO2IRO2(C)N2(C)N2IN2IN2(C)H2O(C)H2OIH2OIH2O(C)fh(C)fh飛飛灰灰焓焓IfhIfh（）kJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/Nm3kJ/Nm3kJ/kgkJ/kg100169175.20130578.2715180.3480.80201026

2、01156.55304161.74169.1042.22300559579.523921743.72463246.34263.7065.84400772800.345272344.23626333.07360.0089.885009961032.566642953.64794422.45458.50114.4760012221266.858043576.40967514.50559.80139.7670014611514.629464208.051147610.27663.20165.5780017041766.5410934861.941335710.29767.20191.54900195

3、12022.6112435529.181524810.85874.00218.20100022022282.8213946200.871725917.79984.00245.67110024572547.1815456872.5519261024.741096.00273.63120027172816.7216957539.7921311133.811206.00301.09130029763085.2318508229.2723441247.131360.00339.54140032403358.9220098936.5425581360.991571.00392.2215003504363

4、2.6121649626.0227791478.581758.00438.90160037673905.26232310333.3030011596.691830.00456.88170040354183.10248211040.5732271716.942066.00515.80180043034460.94264211752.2934581839.842184.00545.26190045714738.77280512477.3536881962.212385.00595.44200048435020.76296413184.6339262088.842512.00627.15210051

5、155302.74312713909.6941612213.882640.00659.10220053875584.72329014634.7643992340.502760.00689.06備注： 焓溫表關(guān)心的是受熱設(shè)備進(jìn)出口界面線上煙氣的能量特性，所以用了界面上的實(shí)際過量空氣系數(shù)V0Nm3/kg5.6171IyIyI Iy0y0（1 1）I Ik0k0I Ifhfh （kJ/kgkJ/kg）0.9理理論論煙煙氣氣焓焓Iyq0Iyq0實(shí)實(shí)際際煙煙氣氣焓焓Iyq a=1.2(C)k(C)k理理論論空空氣氣焓焓Ik0Ik0爐爐膛膛屏屏高高溫溫過過熱熱器器1.21.21.251.25IyIyIyI

6、yIyIyIyIykJ/kgkJ/kgkJ/kgkJ/kgkJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kg833.821002.28132741.461002.281039.351688.392029.442661494.162029.441027.162104.151064.802569.573088.154032263.703088.151058.713201.341097.183477.634176.415423044.494176.411088.264328.631127.294408.655291.54684

7、3842.125291.541115.145483.651155.025357.746429.958304662.226429.951138.416663.061179.416332.947598.359795499.177598.351168.407873.311210.257338.788799.7911306347.368799.791201.449117.161243.858362.6410019.9512817195.5510019.951220.1610379.731262.579401.4811260.3914368066.2011260.391240.4411663.70128

8、3.9710444.4712509.9615958959.3312509.961249.5812957.931294.2311490.3213761.9017549852.4513761.901251.9414254.521296.6012561.6415050.29191310745.5715050.291288.3915587.571333.0413656.4616380.91207611661.1716380.911330.6216963.961376.4014737.2117691.46223912576.7617691.461310.5618320.301356.3415835.25

9、18991.72240313497.9718991.721300.2619666.621346.3216940.6120339.11256614413.5620339.111347.3921059.791393.1718053.0721664.16272915329.1521664.161325.0422430.611370.8219178.3423028.35289716272.8323028.351364.1923841.991411.3820294.2324363.55306417210.8924363.551335.2025224.101382.1121426.3125716.3232

10、3218154.5725716.321352.7726624.051399.9622559.9927067.57339919092.6327067.571351.2528022.211398.15Ifh=fh*Ay/100*(C)fh備注： 焓溫表關(guān)心的是受熱設(shè)備進(jìn)出口界面線上煙氣的能量特性，所以用了界面上的實(shí)際過量空氣系數(shù)高高溫溫再再熱熱器器低低溫溫再再熱熱器器 主主省省媒媒器器空空預(yù)預(yù)熱熱段段空空預(yù)預(yù)冷冷段段1.281.281.311.311.341.341.441.44IyIyIyIyIyIyIyIyIyIyIyIyIyIyIyIyIyIykJ/kgkJ/kgkJ/kgkJ/kgkJ/k

11、gkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kg1061.601083.841106.091180.231254.382148.981087.382193.801109.962238.621132.542388.041207.812537.463269.251120.273337.161143.363405.071166.443631.441243.403857.814419.961150.724511.301174.144602.631197.564907.081275.645211.535598.91117

12、8.955714.171202.885829.441226.806213.651306.576597.866802.931204.016942.791228.627082.661253.227548.881335.238015.108038.281235.368203.261260.468368.231285.579307.581269.309498.001294.749688.421320.1910595.601288.0210811.461313.4611027.331338.9111905.681310.0912147.671336.2112389.661362.3313226.7113

13、21.0313495.491347.8213764.271374.6114550.101323.3914845.671350.1815141.251376.9815909.931359.8416232.301386.6316554.671413.4217313.801403.8717663.631431.3318013.471458.8018697.611383.8119074.911411.2719452.211438.7420071.561373.9620476.501401.5920881.441429.2321492.201420.6421924.611448.1122357.0114

14、75.5722890.491398.2923350.361425.7623810.241453.2224330.171439.6924818.361468.0025306.541496.3125740.421410.2526256.751438.3926773.081466.5327168.691428.2727713.331456.5828257.961484.8928594.981426.2929167.761454.4429740.541482.58備注： 焓溫表關(guān)心的是受熱設(shè)備進(jìn)出口界面線上煙氣的能量特性，所以用了界面上的實(shí)際過量空氣系數(shù)IyIyI Iy0y0（1 1）I Ik0k0I

15、 Ifhfh （kJ/kgkJ/kg） 溫溫度度1.541.54IyIykJ/kgkJ/kg（）1001283.082001320.353001353.724001386.335001417.246007008009001000110012001300140015001600170018001900200021002200備注： 焓溫表關(guān)心的是受熱設(shè)備進(jìn)出口界面線上煙氣的能量特性，所以用了界面上的實(shí)際過量空氣系數(shù)IyIyI Iy0y0（1 1）I Ik0k0I Ifhfh （kJ/kgkJ/kg）空空預(yù)預(yù)冷冷段段鍋爐蒸發(fā)量：420t/h再熱蒸汽流量：350t/h過熱蒸汽壓力：13.7MPa(表

16、壓)溫度：540攝氏度再熱蒸汽進(jìn)口壓力：2.5MPa(表壓)溫度：330攝氏度再熱蒸汽出口壓力：2.3MPa(表壓)溫度：540攝氏度給水壓力：15.6MPa(表壓)溫度：235攝氏度鍋爐車間空氣溫度：20攝氏度空氣中所含水分：10g/Kg燃料特性：燃料種類：煙煤燃料成分：Cy55.43%Hy3.09%Oy4.13%Ny1.34%Sy0.34%Ay27.74%Wy7.93%100Vr20.19%燃料的低位發(fā)熱量：Qydw21270KJ/Kg灰熔點(diǎn)：t11500攝氏度t21550攝氏度t31580攝氏度燃燒方式：中間貯倉(cāng)，閉式熱風(fēng)送粉，筒式鋼球磨；鍋爐類型及其他要求：汽包壓力：15.2MPa(表

17、壓)排煙溫度：135攝氏度減溫水量(假設(shè))11t/h熱空氣320攝氏度爐膛壓力p0.098Mpaazf0.1誤差要求：主受熱面為2%，輔助受熱面為10%，總熱量為0.5%。當(dāng)主傳熱量誤差超限時(shí)，可通過改變面積來滿足誤差要求。噴水量誤差控制在絕對(duì)量1-2t/h焓值#NAME?#NAME?#NAME?#NAME?誤差要求：主受熱面為2%，輔助受熱面為10%，總熱量為0.5%。當(dāng)主傳熱量誤差超限時(shí)，可通過改變面積來滿足誤差要求。噴水量誤差控制在絕對(duì)量1-2t/h第第二二節(jié)節(jié)、煤煤的的元元素素分分析析數(shù)數(shù)據(jù)據(jù)校校核核和和煤煤種種判判別別煤的元素成分：Cy55.43%Hy3.09%Oy4.13%Ny1.

18、34%Sy0.34%Ay27.74%Wy7.93%100Vr20.19%已知應(yīng)用基成分成分轉(zhuǎn)換系數(shù)可燃基成分折算成份Cy55.431.5545Cr86.1651Cyzs10.9114Hy3.09Hr4.8034Hyzs0.6083Oy4.13Or6.4200Oyzs0.8130Ny1.34Nr2.0830Nyzs0.2638Sy0.34Sr0.5285Syzs0.0669Ay27.741.0861Ag30.1292Ayzs5.4606高灰分煤Wy7.931.0000Wy7.9300Wyzs1.5610Vr20.19VrQydw212701.0000Qydw21270.000033372.065

19、9143.183633515.2495100100yyWA-100100yW -100(25)100ryydwdwyyQQWWA=+-3391030109()rrrrrdwQCHOS=+- r dwQr dwQ100100yyWA-100100yW -第第四四節(jié)節(jié)、燃燃燒燒產(chǎn)產(chǎn)物物和和鍋鍋爐爐熱熱平平衡衡的的計(jì)計(jì)算算一一、燃燃燒燒產(chǎn)產(chǎn)物物的的計(jì)計(jì)算算成分空氣理論煙氣煤的成分(應(yīng)用基)百分比所需氧氣Nm3所需空氣Nm3煙氣成分理論煙氣Nm3Cy55.43001.03434.9254CO21.0343Hy3.09000.17180.8181SO20.0024Oy4.1300-0.0289-0.13

20、77H2O-H0.34300.5321Ny1.3400-H2O-W0.0987Sy0.34000.00240.0113H2O-V00.0903Ay27.7400-N-N0.01074.4483Wy7.9300VO201.1796N-V04.4375成分相加100.0000V05.6171Vy06.0170一) 理論空氣量及理論煙氣容積V05.6171Nm3/KgVN204.4483Nm3/KgVRO21.0367Nm3/KgVH2O00.5321Nm3/KgVy06.0170Nm3/Kg二) 空氣平衡表及煙氣特性表符號(hào)單位爐膛，后屏過熱器(l,hp)對(duì)流過熱器(dlgr)高溫再熱器(gzr)煙

21、道進(jìn)口-1.20001.2500煙道漏風(fēng)0.05000.05000.0300煙道出口1.20001.25001.2800煙道平均pj1.20001.22501.2650過剩空氣量VNm3/Kg1.12341.26391.4885受熱面名稱項(xiàng)目名稱水蒸氣容積VH2ONm3/Kg0.55010.55240.5560煙氣容積VyNm3/Kg7.15857.30127.5295RO2氣體占煙氣容積份額rRO20.14480.14200.1377水蒸氣占煙氣容積份額rH2O0.07690.07570.0738三原子氣體和水蒸氣占煙氣容積總份額rn0.22170.21760.2115煙氣質(zhì)量GyKg/Kg

22、9.52589.709210.0026飛灰無因次濃度hKg/Kg0.02620.02570.0250三) 煙氣焓溫表見工作表焓溫表二二、熱熱平平衡衡及及燃燃料料消消耗耗量量計(jì)計(jì)算算熱熱平平衡衡及及燃燃料料消消耗耗量量計(jì)計(jì)算算序號(hào)名稱符號(hào)單位計(jì)算公式或數(shù)據(jù)來源1燃料帶入熱量QrkJ/kgQydw2排煙溫度tpyoC給定3排煙焓HpykJ/kg查焓溫表空氣預(yù)熱冷段4冷空氣溫度IlkoC給定（鍋爐車間工作溫度）5理論空氣焓HolkkJ/kg查焓溫表理論空氣焓6機(jī)械不完全燃燒熱損失q4%取用7化學(xué)不完全燃燒熱損失q3%取用8排煙熱損失q2%9散熱損失q5%查圖形2-1510灰渣物理熱損失q6%11保熱

23、系數(shù)12鍋爐總熱損失q%q2+q3+q4+q5+q613鍋爐熱效率gl%100-q14過熱蒸汽焓hgrkJ/kg查蒸汽特性表，p=13.7MPa,t=540oC15給水焓hgskJ/kg查水特性表，p=15.6MPa,t=235oC16過熱蒸汽流量Dgrkg/h已知1001001)(/42-=rolkp yp yrQqHHQQa(27.74)(50.76)419y y dwQA =忽略51 100q -17再熱蒸汽出口焓hzrkJ/kg查蒸汽特性表，p=2.3MPa,t=540oC18再熱蒸汽進(jìn)口焓hzrkJ/kg查蒸汽特性表，p=2.5MPa,t=330oC19再熱蒸汽流量Dzrkg/h已知

24、20再熱蒸汽焓增量hzrkJ/kghzr-hzr21鍋爐有效利用熱QglkJ/hDgrgr(hgrgr-hgsgs)+Dzrzr(hzrzr-hzrzr)22實(shí)際燃料消耗量Bkg/hQgl/(glQr)23計(jì)算燃料消耗量Bjkg/h -10014qB實(shí)際煙氣成分實(shí)際煙氣Nm3成分份額CO21.0343RO2容積份額0.1448SO20.0024H2O容積份額0.0743爐膛出口過量空氣系數(shù)1.2000飛灰質(zhì)量濃度0.0262過量空氣1.1234飛灰份額0.9000 其中-O0.2359 -N0.8875過量水蒸汽0.0181Vy7.1585Gy,kg9.5258低溫再熱器旁路省煤器(dzr，p

25、sm)主省煤器(sm)空氣預(yù)熱器(ky)1.28001.31001.34000.03000.03000.20001.31001.34001.54001.29501.32501.44001.65711.82562.4715第第四四節(jié)節(jié)、燃燃燒燒產(chǎn)產(chǎn)物物和和鍋鍋爐爐熱熱平平衡衡的的計(jì)計(jì)算算一一、燃燃燒燒產(chǎn)產(chǎn)物物的的計(jì)計(jì)算算二) 空氣平衡表及煙氣特性表0.55870.56140.57187.70077.87208.52830.13460.13170.12160.07260.07130.06710.20720.20300.188610.222710.442811.28640.02440.02390.0

26、221數(shù)值21270.00001351703.455320148.29232.000.006.800.400.000.99609.2090.80#NAME?#NAME?4.20E+05三) 煙氣焓溫表見工作表焓溫表二二、熱熱平平衡衡及及燃燃料料消消耗耗量量計(jì)計(jì)算算熱熱平平衡衡及及燃燃料料消消耗耗量量計(jì)計(jì)算算計(jì)算公式或數(shù)據(jù)來源Qydw給定查焓溫表空氣預(yù)熱冷段給定（鍋爐車間工作溫度）查焓溫表理論空氣焓取用取用查圖形2-15q2+q3+q4+q5+q6100-q查蒸汽特性表，p=13.7MPa,t=540oC查水特性表，p=15.6MPa,t=235oC已知1001001)(/42-=rolkp y

27、p yrQqHHQQa(27.74)(50.76)419y y dwQA =14m,所以爐膛高度設(shè)計(jì)合理三三、爐爐膛膛和和前前屏屏過過熱熱器器結(jié)結(jié)構(gòu)構(gòu)尺尺寸寸計(jì)計(jì)算算爐膛結(jié)構(gòu)尺寸計(jì)算序號(hào)名稱符號(hào)單位 計(jì)算公式或數(shù)據(jù)來源1側(cè)墻面積A1m2據(jù)圖3-5A2m2據(jù)圖3-5 1 1 227310033600273ljrV Bt zwa+ 。 2 2 227310043600273ljrV Bt zwa+ 。 3 327310036003273ljrV Bt zwa+ 。22ba+0.5832 9.438()j r rrl h bb=r2 2 /325,b420j j rl l b =結(jié)構(gòu)設(shè)計(jì)時(shí)定為A3m

28、2據(jù)圖3-5A4m2據(jù)圖3-5Acm2A1+A2+A3+A42前墻面積Aqm2據(jù)圖3-53后墻面積Ahm2據(jù)圖3-54爐膛出口煙窗面積Achm2據(jù)圖3-55爐頂包覆面積Aldm2據(jù)圖3-56前屏面積Aqp據(jù)圖3-67燃燒器面積Arm2據(jù)圖3-5（燃燒器布置的總寬度和總高度分別為1.2m和6m)8前后側(cè)墻水冷壁角系數(shù)xm2按膜式水冷壁選取9爐頂角系數(shù)xld查附錄三圖(a)4s/d=80/38=2.105, e=010前屏角系數(shù)xqpm2查附錄三圖(a)5s/d=42/38=1.10511爐膛出口煙窗處角系數(shù)xchm2選取12整個(gè)爐膛的平均角系數(shù)m213前屏區(qū)的側(cè)墻面積Apq,cm2據(jù)圖3-514

29、前屏區(qū)的爐頂面積Apq,ldm2據(jù)圖3-515前屏區(qū)的爐墻面積Apqm2pq,c+Apq,ld16爐膛自由容積的水冷壁面積Azym217爐膛容積Vlm3Aca18前屏占據(jù)容積Vpm3據(jù)圖3-519爐膛的自由容積Vzym3Vl-Vp20前屏區(qū)與爐膛的水平分割面積Af,shm2據(jù)圖3-521前屏區(qū)與爐膛的垂直分割面積Af,chm2據(jù)圖3-522自由容積的輻射層有效厚度Szym3.6Vzy/Azy23前屏間容積的輻射層有效厚度Spqm24爐膛的輻射層有效厚度Sm25燃燒器中心線的高度hrm據(jù)圖3-5x2 2cqhchchldldqpqpcqhchldqpA xA xA xA xA xA xAAAAA

30、A+Aq+Ah+2(Ac-A4/2-Apq,c/2)+Ach+(Ald-Apq,ld)3.6VlAzy+Apq+Aqzyl zypqqpzypqlV 3.6V(1)A +A+AA +AVqpA +26爐膛高度Hlm據(jù)圖3-527燃燒器相對(duì)高度hr/Hlhr/hl(見圖3-5,hr=7.515m)28火焰中心相對(duì)高度xlhr/Hl+x，x按附錄二表查得等于0前屏過熱器結(jié)構(gòu)尺寸計(jì)算序號(hào)名稱符號(hào)單位 計(jì)算公式或數(shù)據(jù)來源1管徑及壁厚dmm由結(jié)構(gòu)面設(shè)計(jì)2單片管子根數(shù)n1根由結(jié)構(gòu)面設(shè)計(jì)3前屏片數(shù)z1片由結(jié)構(gòu)面設(shè)計(jì)4蒸汽流通截面積Am20.785dn2z1n1 dn為管了內(nèi)徑5蒸汽質(zhì)量流速wkg/(m2s)

31、(D-Djw)/(3600A)6前屏蒸汽平均比容pjm3/kg查蒸汽特性表p=14.55MPa,t=372oC7蒸汽流速wm/swpj8前屏輻射受熱面積Aqpm2Aqp=2z1*bqp*hqp*xqp四四、爐爐膛膛熱熱力力計(jì)計(jì)算算（帶帶前前屏屏過過熱熱器器）爐膛熱力計(jì)算序號(hào)名稱符號(hào)單位 計(jì)算公式或數(shù)據(jù)來源1熱空氣溫度trkoC給定2理論熱空氣焓HrkokJ/kg查焓溫表3爐膛漏風(fēng)系數(shù)l由空氣平衡表3-1得知4制粉系統(tǒng)漏風(fēng)系數(shù)zf選用5冷空氣溫度tlkoC給定6理論冷空氣焓HlkokJ/kg查焓溫表3-37空預(yù)器出口過量空氣系數(shù)kyl-(l+zf)8空氣帶入爐內(nèi)熱量QkkJ/kgkyHrko+(

32、l+zf)Hlko91kg燃料帶入爐內(nèi)的熱量QlkJ/kg10理論燃燒溫度TaoC根據(jù)Ql查焓溫表3-311爐膛出口煙溫TloC假定12爐膛出口煙焓HlkJ/kg查焓溫表3-313煙所的平均熱容量VcpjkJ/(kgoC)(Ql-Hl)/(Ta-Tl)3464100100rkqqqQQq -+ -14水蒸汽容積份額rH2O查煙氣特性表3-215三原子氣體容積份額rn查煙氣特性表3-216三原子氣體分壓力pnMPaprn(p為爐膛壓力,等于0.098MPa)17pn與S的乘積pnSmMPapnS18三原子氣體輻射減弱系數(shù)Ky1/(mMPa)19灰粒子輻射減弱系數(shù)Kh1/(mMPa)dh 灰粒的平

33、均直徑取dh=13um 20焦碳粒子輻射減弱系數(shù)Kj1/(mMPa)取用21無因次量x1按參考文獻(xiàn)1選取22無因次量x2按參考文獻(xiàn)1選取23半發(fā)光火焰輻射減弱系數(shù)K1/(mMPa)Kyrn+Khh+Kjx1x224乘積KpSKpS25爐膛火焰有效黑度ahy1-e-KpS26乘積pnSzymMPapnSzy27乘積自由容積內(nèi)三原子氣體輻射減弱系數(shù)Ky1/(mMPa)28乘積KpSzyKpSzy29自由容積的火焰有效黑度azy1-e-KpSzy30乘積pnSpqmMPapnSpq31屏間容積內(nèi)三原子氣體輻射減弱系數(shù)Ky1/(mMPa)32乘積KpSpqKpSpq33屏間容積的火焰有效黑度apr1-

34、e-KpSpq34屏寬A與Szy比值A(chǔ)/SzyA/Szy(A=bqp,見圖3-6)35屏寬A與屏節(jié)距之比A/s136屏的修正系數(shù)cp查附錄三圖V(b)37屏區(qū)的修正系數(shù)cpq查附錄三圖V(b)38系數(shù)a查附錄三圖V(a)39屏的輻射系數(shù)p查附錄三圖V(c)40屏區(qū)的輻射系數(shù)pq查附錄三圖V(d)41屏的黑度apapr+pcpazy42屏區(qū)的黑度apqapr+pqcpqazy20.78 1.610(0.1)(1 0.37)100010H Ol nr T p s+ -20.781.610(0.1)(10.37)100010H Ol nzyr T p s+ -20.781.610(0.1)(10.3

35、7)100010H Ol npqr T p s+ -22355900lhTd43屏的暴光不均勻系數(shù)zpap/azy44屏區(qū)水冷壁的暴光不均勻系數(shù)zpqapq/azy45計(jì)及暴光不均勻的屏的面積Aqpm246計(jì)及暴光不均勻的屏區(qū)面積Apqm247爐墻總面積Alqm2Azy+Aqp+Apq48前后側(cè)墻水冷壁的沾污系數(shù)查附錄二表49屏的沾污系數(shù)p查附錄二表50爐頂包覆管沾污系數(shù)ld查附錄二表51爐膛出口屏的沾污系數(shù)ch(查附錄三圖,得=0.98)52前后側(cè)墻水冷壁熱有效系數(shù)x53爐頂包覆管的熱有效系數(shù)ldldxld54屏的熱有效系數(shù)ppxqp55爐膛出口處的屏的熱有效系數(shù)chchxch56平均熱有效

36、系數(shù)pj57爐膛黑度al58與爐內(nèi)最高溫度位置有關(guān)的系數(shù)MB-Cxl,B、C查附錄二表V B=0.56,C=0.559爐膛出口煙溫tloC60爐膛出口煙焓HlkJ/kg查焓溫61爐膛吸熱量QlfkJ/kg(Ql-Hl)62爐膛容積熱強(qiáng)度qVW/m3BQdwy/(3.6Vl)63爐膛截面熱強(qiáng)度qFW/m2BQdwy/(3.6Al)64爐內(nèi)平均輻射熱強(qiáng)度qlpjW/m2BjQlf/(3600Alq)65爐頂輻射吸熱分布系數(shù)ld查附錄三圖66爐頂輻射熱強(qiáng)度qldW/m2ldqlpj67爐頂輻射受熱面積Aldm268爐頂吸熱量QldWAldqldqppAzxpqpqA zxqhcrpq,cldldpq

37、,ldpqppq,cpqldpq,ldpqlqA +A +2(A -A /2-A/2)+(A -A)+A +Az +Az /Ayyyyy(1)hyhyhypja aay+-0.63 02732733.6/()1a pjlplajpjT MA aTB VCs yj+ - + pq,ldldpq,ldldpq(A -A)x +AxzkJ/kg3.6Aldqld/Bj69前屏輻射吸熱分布系數(shù)qp查附錄三圖70前屏輻射熱強(qiáng)度qqpW/m2qpqlpj71前屏吸熱量QqpWAqpqqpkJ/kg3.6Aqpqqp/Bj72后屏輻射吸熱分布系數(shù)hp查附錄三圖73后屏輻射熱強(qiáng)度qhphpqlpj74后屏吸熱

38、量QhpWqhpAhp(Ahp=Ach)kJ/kg3.6qhpAhp/Bj75附加過熱器總吸熱量QfjkJ/kg先假定后校核76一級(jí)減速溫水量Djw1kg/h先假定后校核77二級(jí)減速溫水量Djw2kg/h先假定后校核78附加過熱器焓增量hfjkJ/kgQfjBj/(D-Djwl-Djw2)79飽和蒸汽焓hbqkJ/kg查蒸汽特性表，p=15.3MPa,t=345oC80包覆出口蒸汽焓hbfkJ/kghbq+hfj81包覆出口蒸汽溫度tbfoC查蒸汽特性表，p=14.7MPa82前屏焓增量hqpkJ/kgQqpBj/(D-Djwl-Djw2)83前屏出口蒸汽焓hqpkJ/kghbf+hqp84前

39、屏出口蒸汽溫度tqpoC查蒸汽特性表，p=14.41MPa85爐膛出口煙溫校核tloCtl(假定值)-tl(計(jì)算值)數(shù) 值1.59E+05#NAME?4.2680E+06#NAME?#NAME?9.6#NAME?501.2#NAME?2.5#NAME?4530384.510000.11366.6052E-04172.0135066.112828.67421.11751.972418第第五五節(jié)節(jié)、爐爐膛膛設(shè)設(shè)計(jì)計(jì)和和熱熱力力計(jì)計(jì)算算一一、爐爐膛膛結(jié)結(jié)構(gòu)構(gòu)的的設(shè)設(shè)計(jì)計(jì)（帶帶前前屏屏過過熱熱器器）（一）爐膛尺寸的確定1240780611001181.86#NAME?#NAME?10106.50.8#

40、NAME?#NAME?43.843#NAME?606801.33120121104#NAME?數(shù)值25354525（二）水冷壁二二、燃燃燒燒器器的的設(shè)設(shè)計(jì)計(jì)燃燃燒燒器器結(jié)結(jié)構(gòu)構(gòu)尺尺寸寸計(jì)計(jì)算算2055200310704#NAME?#NAME?#NAME?800#NAME?1240.2420#NAME?#NAME?#NAME?56521.7設(shè)計(jì)合理數(shù)值44.3810.0100#NAME?1.4414.4328.86751按圖2-28示意的lhy（lhy=abcd折線長(zhǎng)度25.1m）的計(jì)算結(jié)果符合表2-19規(guī)定，而且上排燃燒器中心線到前屏下邊緣高度為15.7m14m,所以爐膛高度設(shè)計(jì)合理三三、爐爐

41、膛膛和和前前屏屏過過熱熱器器結(jié)結(jié)構(gòu)構(gòu)尺尺寸寸計(jì)計(jì)算算爐膛結(jié)構(gòu)尺寸計(jì)算#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?87.53 58.75191 29.37596#NAME?113488.6642.60290.1628.810.590.951#NAME?48.3623.2171.57#NAME?#NAME?232.1#NAME?23.21192#NAME?1.45#NAME?#NAME?#NAME?#NAME?#NAME?數(shù)值38.04.52860.1111024#NAME?#NAME?275.65數(shù)值3202

42、4200.050.120148.31.052563.123833.119601181.86#NAME?13535#NAME?13.2前屏過熱器結(jié)構(gòu)尺寸計(jì)算四四、爐爐膛膛熱熱力力計(jì)計(jì)算算（帶帶前前屏屏過過熱熱器器）爐膛熱力計(jì)算0.07690.22170.0217#NAME?#NAME?78.75120.50.1#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?0.0316.970#NAME?#NAME?#NAME? 0.940.840.850.1240.081#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?0.450.350.

43、450.4410.980.450.26550.33250.441#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?#NAME?0.84#NAME?#NAME?#NAME?#NAME?0.84#NAME?#NAME?#NAME?0.82#NAME?#NAME?#NAME?#NAME?#NAME?886.6867如何校核？#NAME?6.00E+03#NAME?5.00E+03#NAME?#NAME?721.0076#NAME? #NAME?#NAME?#NAME?#NAME?#NAME?第第六六節(jié)節(jié)、后后屏屏過過熱熱器器熱熱力力計(jì)計(jì)算算一一、后后屏屏

44、過過熱熱器器結(jié)結(jié)構(gòu)構(gòu)尺尺寸寸計(jì)計(jì)算算后屏過熱器結(jié)構(gòu)尺寸計(jì)算序號(hào)名稱符號(hào)單位計(jì)算公式或數(shù)據(jù)來源數(shù)值1管徑及壁厚dmm選用38.00002屏片數(shù)z1片選用143單片管子根數(shù)n1根選用124屏的深度cm選用2.32005屏的平均高度hpjm據(jù)圖3-7 取8.39.156橫向節(jié)距s1mm6307比值s1/ds1/d16.588縱向平均節(jié)距s2pjmm據(jù)圖3-7 2320/47 (屏的深度方向有47個(gè)管間距)49.369比值s2pj/ds2pj/d1.3010屏的角系數(shù)xhp查附錄三(a)之50.9611屏區(qū)接受爐膛熱輻射面積Apqfm2Apqf=Ach#NAME?12屏的對(duì)流受熱面積Apm2據(jù)圖3-7

45、620.613屏的計(jì)算對(duì)流受熱面積Apjsm2Apxhp595.714屏區(qū)爐頂受熱面積Aldm2據(jù)圖3-713.140515屏區(qū)兩側(cè)水冷壁受熱面積Acqm2據(jù)圖3-744.326016屏區(qū)附加受熱面積Apfjm2Ald+Acq57.466517屏接受爐膛熱輻射面積Apfm2ApqfApjs/(Apjs+Apfj)#NAME?18爐頂附加受熱面輻射面積Apfjfldm2ApqfAld/(Apjs+Apfj)#NAME?19水冷壁附加受熱面輻射面積Apfjfslbm2ApqfAcq/(Apjs+Apfj)#NAME?20煙氣進(jìn)屏流通截面積Apm2據(jù)圖3-5和圖3-7#NAME?21煙氣出屏流通截面

46、積Apm2據(jù)圖3-5和圖3-774.766422煙氣平均流通截面積Apjm22ApAp/(Ap+Ap)#NAME?23蒸汽流通截面積Am2dn2n1z1/40.111024蒸汽質(zhì)量流速wkg/(m2s)(D-Djw2)/(3600A)1038.844225煙氣輻射層有效厚度Sm1.8/(1/hpj+1/s1+1/c)0.8460二二、后后屏屏過過熱熱器器熱熱力力計(jì)計(jì)算算后屏過熱器熱力計(jì)算序號(hào)名稱符號(hào)單位計(jì)算公式或數(shù)據(jù)來源數(shù)值1煙氣進(jìn)屏溫度TpoCTp=Tl#NAME?2煙氣進(jìn)屏焓HpkJ/kgHp=Hl#NAME?3煙氣出屏溫度TpoC假定1042.034煙氣出屏焓HpkJ/kg查焓溫表3-3

47、11785.58375煙氣平均溫度TpjoC(Tp+Tp)/2#NAME?6屏區(qū)附加受熱面對(duì)流吸熱量QpfjdkJ/kg先估后校Qpfjld= ,Qpfjslb=153.27197屏的對(duì)流吸熱量QpdkJ/kg(Hp-Hp)-Qpfjd#NAME?8屏入口吸收的爐膛輻射熱量QpfkJ/kgQpf=Qhp#NAME?9三原子氣體輻射減弱系數(shù)Ky1/(mMpa)#NAME?10乘積Kyrn1/(mMpa)Kyrn#NAME?11灰粒的輻射減弱系數(shù)Kh1/(mMpa)#NAME?12飛灰濃度hkg/kg查煙氣特性表3-20.026213乘積Khh1/(mMpa)Khh#NAME?14煙氣流的輻射減弱

48、系數(shù)K1/(mMpa)Kyrn+Khh#NAME?15乘積KpSKpS#NAME?16屏區(qū)的煙氣黑度a1-e-KpS#NAME?17屏進(jìn)口對(duì)出口的角系數(shù)p0.133418修正系數(shù)r按煤種選取，據(jù)參考文獻(xiàn)10.519屏出口面積Apfm2等于對(duì)流過熱器進(jìn)口面積，據(jù)圖3-876.820爐膛及屏間煙氣對(duì)屏后受熱面的輻射熱量QpfkJ/kg#NAME?20.781.610(0.1)(10.37)100010H Opjnr T p s+ -22355900/pjhT d211()1ccss+-114r(1)5.67*10/3600ffppppjjQA TBa jaxb-21屏區(qū)吸收爐膛輻射熱量QpqfkJ

49、/kg#NAME?22屏區(qū)爐頂附加受熱面吸收的爐膛輻射熱量QpfjfldkJ/kgQpqfApfjfld/(Apfjfld+Apfjfslb+Apf)#NAME?23屏區(qū)水冷壁附加受熱面吸收的爐膛輻射熱量QpfjfslbkJ/kgQpqfApfjfsld/(Apfjfld+Apfjfslb+Apf)#NAME?24屏所吸收的爐膛輻射熱QpfkJ/kgQpqf-Qpfjflb-Qpfjfslb#NAME?25屏所吸收的總熱量QpkJ/kgQpd+Qpf#NAME?26蒸汽進(jìn)屏焓hpkJ/kg#NAME?27蒸汽進(jìn)屏溫度tpoC查蒸汽特性表,p=14.41MPa#NAME?28蒸汽出屏焓hpkJ/

50、kghp+QpBj/(D-Djw2)#NAME?29蒸汽出屏溫度tpoC查蒸汽特性表,p=14MPa#NAME?30屏內(nèi)蒸汽平均溫度tpjoC(tp+tp)/2#NAME?31屏內(nèi)蒸汽平均比容pjm3/kg查蒸汽特表,p=14.21MPa,t=411oC#NAME?32屏內(nèi)蒸汽平均流速wm/s(D-Djw2)pj/(3600A)#NAME?33管壁對(duì)蒸汽的放熱系數(shù)a2W/(m2oC)查附錄三圖 a2=Cd*a0 Cd=1 413734屏間煙氣平均流速wym/sBjVy(Tpj+273)/(2733600Apj)#NAME?35煙氣側(cè)對(duì)流放熱系數(shù)adW/(m2oC)查附錄三圖32.536灰污系數(shù)

51、m2oC/W查附錄二表0.00737管壁灰污層溫度thboCtpj+(+1/a2)BjQp/(Apjz*3.6)#NAME?38輻射放熱系數(shù)afW/(m2oC)查附錄三錄得a0,af=aa0#NAME?39利用系數(shù)查附錄三圖0.8540煙氣對(duì)管壁的放熱系數(shù)a1W/(m2oC)(add/(2s2xhp+af)#NAME?41對(duì)流傳熱系數(shù)kW/(m2oC)#NAME?42較大溫差tDoCTp-tp#NAME?43較小溫差tXoCTp-tp#NAME?44平均溫差toCtD/tX=1.361.7, t=(tD-tX)/2.3lg(tD/tX)#NAME?17傳熱系數(shù)kW/(m2oC)選取67.591

52、518計(jì)算對(duì)流受熱面積Agrjsm2BjQgrd/(kt*3.6)#NAME?19蒸汽質(zhì)量流速wKg/(m2s)按表2-21選取65020蒸汽流通截面積A m2D/(3600w)0.179521管徑及壁厚d*mm選取38.022每根管子截面積Alm20.785dn25.7227E-0423管子總根數(shù)n根按A/Al選取31224橫向節(jié)距s1mm按s1/d=2.5左右選取90 jw2hpjw2gs(D-D)h+DhD dldslbgsfjfjlkQQQHHa j+-。25管排數(shù)z1根按a/s1-2=104.7選取10426每排管子根數(shù)n1根n/z1327每根管子長(zhǎng)度lmAgrjs/z1n1d#NA

53、ME?28管子彎曲半徑Rmm按R=(1.52.5)d選取7529縱向平均節(jié)距s2pjmm按布置圖3-8結(jié)構(gòu)尺寸計(jì)算73.5縱向節(jié)距s2mm按布置圖3-9結(jié)構(gòu)尺寸計(jì)算4530每根管子長(zhǎng)度lpjm按布置圖3-8結(jié)構(gòu)尺寸計(jì)算28.0831布置的對(duì)流受熱面積Agrbzm2dlpjn1z11045.7832誤差A(yù)%(Agrbz-Agrjs)/Agrbz*100#NAME?二二、對(duì)對(duì)流流過過熱熱器器結(jié)結(jié)構(gòu)構(gòu)尺尺寸寸計(jì)計(jì)算算對(duì)流過熱器結(jié)構(gòu)尺寸計(jì)算序號(hào)名稱符號(hào)單位計(jì)算公式或數(shù)據(jù)來源數(shù)值1管徑及壁厚d*mm有結(jié)構(gòu)設(shè)計(jì)知38.02橫向節(jié)距s1mm有結(jié)構(gòu)設(shè)計(jì)知903縱向平均節(jié)距s2mm有結(jié)構(gòu)設(shè)計(jì)知73.54每排管子

54、根數(shù)n1根有結(jié)構(gòu)設(shè)計(jì)知35管子排數(shù)，布置z1排順流、順列1046蒸汽流通面積Am20.17857煙氣進(jìn)口流通面積Am2據(jù)圖3-8計(jì)算44.708煙氣出口流通面積Am2據(jù)圖3-8計(jì)算37.449煙氣平均流通面積Apjm22AA/(A+A)40.7510輻射層有效厚度S m0.16511計(jì)算對(duì)流受熱面積Agrjsm21045.7812爐頂附加受熱面積Afjldm2據(jù)圖3-8計(jì)算20.8013水冷壁附加受熱面積Afjslbm2據(jù)圖3-8計(jì)算60.85三三、對(duì)對(duì)流流過過熱熱器器熱熱力力計(jì)計(jì)算算對(duì)流過熱器熱力計(jì)算2 n1 10.785d n z1 22s s4 0.9d(-1)dppj1 1dl n z

55、p序號(hào)名稱符號(hào)單位計(jì)算公式或數(shù)據(jù)來源數(shù)值1煙氣進(jìn)口溫度ToCT=Thp1042.032煙氣進(jìn)口焓HkJ/kgH=Hhp11785.583蒸汽進(jìn)口焓hkJ/kg(D-Djw2)hp+Djw2hgz)/D#NAME?4蒸汽進(jìn)口溫度toC查蒸汽特性表，p=14.01MPa#NAME?5蒸汽出口溫度toC已知5406蒸汽出口焓hkJ/kg查蒸汽特性表#NAME?7過熱器吸熱量QgrkJ/kgD(h-h)/Bj#NAME?8爐頂附加受熱面吸熱量QfjldkJ/kg假定50.77949水冷壁附加受熱面吸熱量QfjslbkJ/kg假定148.521310爐膛及后屏、對(duì)過熱器輻射熱量QpfkJ/kg由后屏熱力

56、計(jì)算得#NAME?11爐頂吸收輻射熱量QfjflbkJ/kgQpf*Afjld/(Agrjs+Afjld+Afjslb)#NAME?12水冷壁吸收輻射熱量QfjfslbkJ/kgQpf*Afjsld/(Agrjs+Afjld+Afjslb)#NAME?13過熱器吸收輻射熱量QgrfkJ/kgQpf-Qfjflb-Qfjfslb#NAME?14過熱器對(duì)流吸熱量QgrdkJ/kgQgr-Qgrf#NAME?15煙氣出口焓HkJ/kg#NAME?16煙氣出口溫度ToC查焓溫表#NAME?17煙氣平均溫度TpjoC（T+T）/2#NAME? 蒸汽平均溫度tpjoC(t+t)/2#NAME?19煙氣流速

57、wym/sBjVy(Tpj+273)/(2733600Apj)#NAME?20煙氣側(cè)對(duì)流放熱系數(shù)adW/(m2oC)查附錄圖XIcs=cz=1,ct=0.92483.1621蒸汽平均比容vpjm3/kg查蒸汽特性表，p=14.01MPa#NAME?22蒸汽平均流速w m/sDgrvpj/3600A#NAME?23灰污系數(shù)/w查附錄圖X(推薦值：0.0043)0.004324蒸汽側(cè)放熱系數(shù)a2W/(m2oC)查附錄圖IX a2=Cd*a0 Cd=1.02 2805 管壁灰污層溫度thbtpj+（+1/a2)BjQgr/3.6Agrjs#NAME?26乘積pnSmMpaprnS0.0035327三

58、原子氣體的輻射減弱系數(shù)Ky1/(mMpa)#NAME?28乘積Kyrn1/(mMpa)Kyrn#NAME? dldslbgrfjfjlkQQQHHa j+-+。20.781.610(0.1)(10.37)100010H Opjnr T p s+ -0 dzstaa C C C=29灰粒的輻射減弱系數(shù)Kh1/(mMpa)dh 灰粒的平均直徑取dh=13um #NAME?30乘積Khun1/(mMpa)Khun#NAME?31氣流輻射減弱系數(shù)K1/(mMpa)Kyrn+Khun#NAME?32乘積KpSKpS#NAME?33煙氣黑度a1-e-kps#NAME?34煙氣側(cè)輻射放熱系數(shù)afW/(m2o

59、C)查附錄三錄得a0,af=aa0#NAME?35利用系數(shù)查附錄三圖XIV136煙氣側(cè)放熱系數(shù)alW/(m2oC)(ad+af)#NAME?37熱有效系數(shù)查附錄二表VIII0.638傳熱系數(shù)kW/(m2oC)a1a2/(a1+a2)#NAME?39較小溫差txTp-tp#NAME?40較大溫差tDTp-tp#NAME?41平均溫差ttD/tX=1.721.7, t=(tD-tX)/2.3lg(tD/tX)#NAME?42對(duì)流傳熱量QgrcrkJ/kg#NAME?43誤差Q%（Qgrd-Qgrcr）/Qgrd#NAME?44兩側(cè)水冷壁工質(zhì)溫度tbs查蒸汽特性表，p=15.3Mpa下的飽和溫度#N

60、AME?45平均傳熱溫差t#NAME?46兩側(cè)水冷壁對(duì)流吸熱量QslbdkJ/kg#NAME?47誤差Q%（Qfjslb-Qslbd）/Qsjslb#NAME?48爐頂過熱器進(jìn)口汽焓hgr(ld)kJ/kghgr(ld)=hp(ld)#NAME?49爐頂過熱器進(jìn)口汽溫tgr(ld)tgr(ld)=tp(ld)#NAME?50爐頂過熱器蒸汽焓增量 hgr(ld)kJ/kg#NAME?51爐頂過熱器出口汽焓hgr(ld)kJ/kghgr(ld)+hgr(ld)#NAME?52爐頂過熱器出口汽溫tgr(ld)查蒸汽特性表，p=15.3Mpa#NAME?53平均溫差#NAME?54爐頂過熱器對(duì)流吸熱量