鍋爐課程設(shè)計(jì)Excel表格(含計(jì)算公式)

1、煙氣成分VRO2Nm3/kg0.863566667V0N2Nm3/kg3.83096942V0H2ONm3/kg0.541121848Ifh=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（）kJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/Nm3kJ/Nm3100170146.8063333130498.02602415181.7093990681200358309.15686

2、67260996.052049305165.0421637169300559482.73376673921501.74001463250.5394157264400772666.67346675272018.92088626338.7422769360500994858.38526676642543.76369795430.191869245860012251057.8691678043080.09941969524.347070856170014621262.5344679483631.759011149621.749003466380017051472.38116710944191.080

3、541334721.856545376890019521685.68213312424758.064021526825.7519401874100022041903.30093313925332.709431723932.3529442984110024582122.64686715445915.0167819251041.6595581096120027172346.31063316976501.155121321153.671781206130029772570.83796718537098.7863323441268.3896121360140032392797.092433200976

4、96.4175625591384.7308091571150035033025.07403321668297.8797627791503.7776161758160037693254.78276723258907.003930021624.4477881830170040363485.35506724849516.1280332291747.2824472066180043053717.6545264410129.083134581871.1993512134190045743949.953933280410742.038236901996.7396192385200048444183.116

5、933296411354.993439262124.4443752512210051154417.1435312811983.272341632252.6902532640220053874652.033633328912600.058444022382.0183752760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/kg4.839100529IyIyI Iy0y0（1 1）I Ik0k0I Ifhfh （kJ/kgkJ/kg）0.9飛飛灰灰焓焓IfhIfh理理論論煙煙氣氣焓焓Iy0Iy0實(shí)實(shí)際際煙煙氣氣焓焓 Iya=1.2(C)k(

6、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1.21.2IyIyIyIyIyIykJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/Nm3kJ/Nm3kJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kg26.41167 726.54176 880.70568132638.7612698880.705681912.64374455.10583 1470.2511 1782.79712661287.2007411782.79706 902.091376 1847.1570986.08248 2235.0132 2711.12724

7、031950.1575132711.12718 928.33012 2808.63505117.3852 3024.3366 3666.28035422622.7924873666.28032 955.153147 3797.41995149.3401 3832.3408 4643.66986843309.9447624643.66984 977.389518 4809.16708182.9253 4662.3156 5648.53168304016.4534395648.53161 1004.86177 5849.35428216.1844 5516.0425 6679.7228979473

8、7.4794186679.72277 1031.19116 6916.59674250.4218 6385.3183 7729.376711305468.1835987729.37673 1049.65396 8002.78591284.9852 7269.4981 8794.260812816198.8877788794.26083 1064.88409 9104.20522320.8529 8168.3633 9879.005914366948.948369879.00586 1084.74503 10226.4533357.3727 9079.3232 10980.36915957718

9、.36534410980.369 1101.36314 11366.2873393.2404 10001.138 12091.93417548487.78232812091.9344 1111.56541 12516.3235443.4552 10938.014 13232.90919139257.19931213232.909 1140.97457 13695.7689512.256 11878.241 14399.691207610045.972714399.6913 1166.78234 14901.9899573.2311 12826.731 15566.912223910834.74

10、60815566.9117 1167.22037 16108.649596.7081 13786.234 16708.614240311628.3585716708.6143 1141.70258 17290.0322673.6606 14748.766 17905.853256612417.1319617905.8526 1197.23829 18526.7092695.8334 15717.937 19054.951272913205.9053419054.9514 1149.09888 19715.2467777.6769 16688.732 20270.184289714018.874

11、2320270.1836 1215.23216 20971.1273819.0878 17662.555 21447.043306414827.0040221447.0433 1176.85971 22188.3935860.8248 18653.106 22641.925323215639.9729122641.9255 1194.88217 23423.9241899.9532 19634.11 23823.684339916448.102723823.6842 1181.75869 24646.0893Ifh=fh*Ay/100*(C)fhfh備注： 焓溫表關(guān)心的是受熱設(shè)備進(jìn)出口界面線上

12、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1.251.251.281.281.311.311.341.341.441.44IyIyIyIyIyIyIyIyIyIyIyIyIyIyIyIyIyIykJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kgkJ/kg931.806582950.96942970.1322581034.0084934.5133 1885.77312 953.9665 1924.3

13、8914 973.4197 1963.00516 992.8729 2091.7252 1057.717961.478 2867.13978 981.3667 2925.6445 1001.255 2984.14923 1021.144 3179.1651087.44988.7849 3876.10372 1008.964 3954.7875 1029.143 4033.47127 1049.322 4295.7505 1116.5861011.747 4908.46542 1032.362 5007.76377 1052.976 5107.06211 1073.591 5438.0566 1

14、142.3061040.187 5969.84788 1061.382 6090.34149 1082.578 6210.83509 1103.773 6612.4804 1174.4241067.242 7058.72113 1088.873 7200.84551 1110.504 7342.96989 1132.1351086.189 8166.83142 1108.11 8330.87693 1130.031 8494.92244 1151.9531101.419 9290.17185 1123.34 9476.13848 1145.262 9662.10512 1167.1831122

15、.248 10434.9217 1144.75 10643.3902 1167.252 10851.8586 1189.7541139.834 11597.8382 1162.916 11829.3892 1185.999 12060.9401 1209.0821150.036 12770.957 1173.119 13025.5905 1196.201 13280.2239 1219.2841179.445 13973.4849 1202.528 14251.2009 1225.61 14528.9169 1248.6931206.221 15203.3691 1229.884 15504.

16、7483 1253.547 15806.1275 1277.2111206.659 16433.6914 1230.322 16758.7338 1253.985 17083.7761 1277.6491181.383 17638.883 1205.192 17987.7337122918336.5845 1252.8081236.677 18899.2231 1260.34 19271.7371 1284.003 19644.251 1307.6671188.538 20111.4239 1212.201 20507.601 1235.864 20903.7782 1259.5271255.

17、881 21391.6935 1280.27 21812.2598 1304.659 22232.826 1329.0481217.266 22633.2036 1241.51 23078.0138 1265.754 23522.8239 1289.9981235.531 23893.1233 1259.92 24362.3225 1284.309 24831.5217 1308.6981222.165 25139.5324 1246.409 25632.9755 1270.653 26126.4185 1294.897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

18、的實(shí)際過量空氣系數(shù)IyIyI Iy0y0（1 1）I Ik0k0I Ifhfh （kJ/kgkJ/kg）高高溫溫過過熱熱器器空空預(yù)預(yù)冷冷段段 溫溫度度1.541.54IyIyIyIykJ/kgkJ/kgkJ/kgkJ/kg（）1097.88451002220.4453 1122.5612003374.1807 1153.7353004558.0298 1183.8494005769.0511 1211.0215007014.1258 1245.0756007008009001000110012001300140015001600170018001900200021002200備注： 焓溫表關(guān)心

19、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）鍋爐蒸發(fā)量：420t/h再熱蒸汽流量：350過熱蒸汽壓力：13.7MPa(表壓) 13.801過熱蒸汽溫度：540再熱蒸汽進(jìn)口壓力：2.5MPa(表壓) 2.6013 再熱蒸汽進(jìn)口溫度：330再熱蒸汽出口壓力：2.3MPa(表壓) 2.4013 再熱蒸汽出口溫度：540給水壓力：15.6MPa(表壓) 15.701給水溫度：235周圍環(huán)境溫度：20攝氏度空氣中所含水分：10燃料特性：燃料種類：煙煤燃料成分：Car45.70%Har3.0

20、5%Oar2.40%Nar1.01%Sar1.50%Aar36.23%War10.02%89.89Var22.83%燃料的低位發(fā)熱量：Q18317KJ/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，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(表壓)排煙溫度假定值：135攝氏度熱空氣溫度假定值：320攝氏度減溫水量(假設(shè))11t/h熱空氣(假定)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

21、對(duì)量1-2t/hht/h攝氏度過熱蒸汽焓3437.47攝氏度再熱蒸汽進(jìn)口焓 3078.348攝氏度再熱蒸汽出口焓 3552.801攝氏度給水焓1016.108g/Kg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：Car45.70%Har3.05%Oar2.40%Nar1.01%Sar1.50%Aar36.23%War10.02%89.89Var22.83%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Car

22、45.701.860465116Cr85.0233CyzsHar3.05Hr5.6744HyzsOar2.40Or4.4651OyzsNar1.01Nr1.8791NyzsSar1.50Sr2.7907SyzsAar36.231.1114Ag40.2645AyzsWar10.021.0000Wy10.0200WyzsVdaf22.83VrQ183171.0000Qydw18317.000034544.1860-59.1634485.0233元素成分CHSO需氧量Nm3燃燒耗氧量0.85306670.16944440.01050000.01680001.016211111100(25)100ry

23、ydwdwyyQQWWA=+-3391030109()rrrrrdwQCHOS=+- r dwQr dwQ理論氮?dú)怏w積3.8309694水蒸氣來源氫燃燒生成水汽化空氣帶入容積Nm3/kg0.3390.1240.078三原子氣體CO2SO2容積Nm3/kg0.8530.011理論煙氣量Nm3/kg5.23510.44640.69720.54860.23090.34298.2817高灰分煤2.2904-59.1628理論空氣量Nm3/kg4.8391005100100yyWA-100100yW -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折算成份理論水蒸汽容積0.5

24、41三原子氣體容積0.8633.83096945.235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Nm3Cy45.700.85314.0622CO20.8531Hy3.050.16940.8069SO20.0105Oy2.40-0.0168-0.0800H2O-H0.33860.5411Ny1.01-H2O-W0.1247Sy1.500.01050.0500H2O-V00.0778Ay36.23-N-N0.00813.8310Wy10.02VO201.0

25、162N-V03.8229成分相加99.9100V04.8391Vy05.2357一) 理論空氣量及理論煙氣容積V04.8391Nm3/KgVN203.8310Nm3/KgVRO20.8636Nm3/KgVH2O00.5411Nm3/KgVy05.2357Nm3/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)煙道進(jìn)口過量空氣系數(shù)-1.20001.2500煙道漏風(fēng)過量空氣系數(shù)0.05000.05000.0300煙道出口過量空氣系數(shù)1.20001.25001.2800煙道平均過量空氣系數(shù)pj1.20001.22501.2650過?？諝?/p>

26、量VNm3/Kg0.96781.08881.2824受熱面名稱項(xiàng)目名稱水蒸氣容積VH2ONm3/Kg0.55670.55870.5618煙氣容積VyNm3/Kg6.21916.34206.5387RO2氣體占煙氣容積份額rRO20.13890.13620.1321水蒸氣占煙氣容積份額rH2O0.08950.08810.0859三原子氣體和水蒸氣占煙氣容積總份額rn0.22840.22430.2180煙氣質(zhì)量GyKg/Kg8.22158.37958.6323飛灰濃度hKg/Kg0.03970.03890.0378三) 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

27、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%Ay(=36.23)Qdw/418(=43.8206)忽略11保熱系數(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，

28、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 yrQqHHQQa51 100q -17再熱蒸汽出口焓hzrkJ/kg查蒸汽特性表，p=2.3+大氣壓MPa,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Bk

29、g/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CO20.8531RO2容積份額0.1389SO20.0105H2O容積份額0.0895爐膛出口過量空氣系數(shù)1.2000飛灰質(zhì)量濃度0.0397過量空氣0.9678飛灰份額0.9000 其中-O0.2032 -N0.7646過量水蒸汽0.0156Vy6.2191Gy,kg8.2215低溫再熱器旁路省煤器(dzr，psm)主省煤器(sm)空氣預(yù)熱器(ky)1.28001.31001.34000.03000.03000.20001.31001.34001.54001.29501.32501.

30、44001.42751.57272.1292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0.56410.56640.57546.68626.83377.39910.12920.12640.11670.08440.08290.07780.21350.20930.19458.82199.01159.73830.03700.03620.0335數(shù)值183171351490.78079120127.752254206.9234125330.3800.99629.30341253390.696587473437.4700

31、361016.107806420000三) 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2-15Ay(=36.23)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

32、 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A3m2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

33、=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Szym3.6

34、Vzy/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 xAAAAAA+Aq+Ah+2(Ac-A4/2-Apq,c/2)+Ach+(Ald-Apq,ld)3.6VlAzy+Apq+Aqzyl zypqqpzypqlV3.6V(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

35、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)(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)

36、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+(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煙氣的平均熱容量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3-2

37、16三原子氣體分壓力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KpSzyK

38、pSzy29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-e-KpSpq34屏寬A與Szy比值A(chǔ)/SzyA/Szy(A=2.424,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.

39、78 1.610(0.1)(10.37)100010H Ol nr T p s+ -20.781.610(0.1)(10.37)100010H Ol nzyr T p s+ -20.781.610(0.1)(10.37)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

40、二表51爐膛出口屏的沾污系數(shù)ch(查附錄三圖,得=0.95)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/(3

41、.6Alq)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,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

42、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

43、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1590002278426800084.861.0869.68.84501.2151.422.52.9466666674530384.510000.11366602000172135066.1111111112828.666666674245.675842118第

44、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1240780611001160.00102.410.710106.50.8531.8418.25743.8433.53660680.51.341666667120120.2546584104110.8136646數(shù)值27505025（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20552003107040.1530.1680.111800130501240.242036440034356521.7設(shè)計(jì)合理數(shù)值44.410.01001

45、11.4414.4328.86751按圖2-28示意的lhy（lhy=abcd折線長度20.52m）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11.077m14m,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161.418.318315.82.323232.65.0250335.8255.687.53 58.75191 29.37596114.2113488.6642.66290.928.810.970.9910.99748.4823.2771.7511132233232.72000.323.271926.471.

46、456.6466.80226.7760.250.25數(shù)值384.52860.11110240.01414.34287.99數(shù)值3202084.6849840.050.120127.7522541.052208.08207120525.082071921.65920611600.5311647.308241159.4711.65583474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0.089515740.2283738110.0223806330.148741693.08611806279.54052888100.50.14.3594025762

47、.8393137730.9415342270.1448026983.1341575482.7641227970.9369686340.0324519197.1429864850.6194711060.4617709720.3746522411.7955555560.78?0.7941176470.351.79555555610.1240.0710.5523945780.4850546420.5895550370.517685037170.987055737.032469731321.0195250.450.42750.430.950.450.42750.950.450.43650.42570.

48、42750.407638980.9753120580.4351159.4698980=?11641.415818849.908327162260.88854269721.471129868.50420.651.3284414.5277230.854830822604595.972134.3587830.84109089.543518652899.85962.21485050.82101167.564811553335.9595.9819363751.237242-53.8869750如何校核？-0.50366500符合要求4200127.87814352618.422486598.552746

49、.30063 340.543177164.0616652910.362295382.33666270.530101634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382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2.325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 2320/45 (屏的深度方向有45個(gè)管間距)51.569比值s2pj/d

50、s2pj/d1.3610屏的角系數(shù)xhp查附錄三(a)之50.8411屏區(qū)接受爐膛熱輻射面積Apqfm2Apqf=Ach114.2012屏的對(duì)流受熱面積Apm2據(jù)圖3-7616.013屏的計(jì)算對(duì)流受熱面積Apjsm2Apxhp517.014屏區(qū)爐頂受熱面積Aldm2據(jù)圖3-721.6015屏區(qū)兩側(cè)水冷壁受熱面積Acqm2據(jù)圖3-744.0016屏區(qū)附加受熱面積Apfjm2Ald+Acq65.6017屏接受爐膛熱輻射面積Apfm2ApqfApjs/(Apjs+Apfj)101.3518爐頂附加受熱面輻射面積Apfjfldm2ApqfAld/(Apjs+Apfj)4.2319水冷壁附加受熱面輻射面

51、積Apfjfslbm2ApqfAcq/(Apjs+Apfj)8.6220煙氣進(jìn)屏流通截面積Apm2據(jù)圖3-5和圖3-7107.0021煙氣出屏流通截面積Apm2據(jù)圖3-5和圖3-774.7022煙氣平均流通截面積Apjm22ApAp/(Ap+Ap)88.0023蒸汽流通截面積Am2dn2n1z1/40.10324蒸汽質(zhì)量流速wkg/(m2s)(D-Djw2)/(3600A)1120.000025煙氣輻射層有效厚度Sm1.8/(1/hpj+1/s1+1/c)0.846二二、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

52、1159.472煙氣進(jìn)屏焓HpkJ/kgHp=Hl11641.423煙氣出屏溫度TpoC假定10374煙氣出屏焓HpkJ/kg查焓溫表3-310286.51025煙氣平均溫度TpjoC(Tp+Tp)/21098.2349496屏區(qū)附加受熱面對(duì)流吸熱量QpfjdkJ/kg先估后校Qpfjld= ,Qpfjslb=1547屏的對(duì)流吸熱量QpdkJ/kg(Hp-Hp)-Qpfjd1195.768屏入口吸收的爐膛輻射熱量QpfkJ/kgQpf=Qhp595.989三原子氣體輻射減弱系數(shù)Ky1/(mMpa)9.9610乘積Kyrn1/(mMpa)Kyrn2.2711灰粒的輻射減弱系數(shù)Kh1/(mMpa)

53、81.9112飛灰濃度hkg/kg查煙氣特性表3-20.039713乘積Khh1/(mMpa)Khh3.248614煙氣流的輻射減弱系數(shù)K1/(mMpa)Kyrn+Khh5.522915乘積KpSKpS0.457916屏區(qū)的煙氣黑度a1-e-KpS0.367417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/kg198.920.781.610(0.1)(10.37)100010H Opjnr T p s+ -22355900/pjhT d211(

54、)1ccss+-114r(1)5.67*10/3600ffppppjjQA TBa jaxb-21屏區(qū)吸收爐膛輻射熱量QpqfkJ/kg397.1022屏區(qū)爐頂附加受熱面吸收的爐膛輻射熱量QpfjfldkJ/kgQpqfApfjfld/(Apfjfld+Apfjfslb+Apf)14.7223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)29.9924屏所吸收的爐膛輻射熱QpfkJ/kgQpqf-Qpfjflb-Qpfjfslb352.3925屏所吸收的總熱量QpkJ/kgQpd+Qpf1548.1526蒸

55、汽進(jìn)屏焓hpkJ/kg2880.7527蒸汽進(jìn)屏溫度tpoC查蒸汽特性表,p=14.41MPa376.228蒸汽出屏焓hpkJ/kghp+QpBj/(D-Djw2)3140.5929蒸汽出屏溫度tpoC查蒸汽特性表,p=14MPa440.530屏內(nèi)蒸汽平均溫度tpjoC(tp+tp)/240831屏內(nèi)蒸汽平均比容pjm3/kg查蒸汽特表,p=14.21MPa,t=408C0.0174032屏內(nèi)蒸汽平均流速wm/s(D-Djw2)pj/(3600A)19.433管壁對(duì)蒸汽的放熱系數(shù)a2W/(m2oC)查附錄三圖 a2=Cd*a0 Cd=0.957400034屏間煙氣平均流速wym/sBjVy(T

56、pj+273)/(2733600Apj)6.8835煙氣側(cè)對(duì)流放熱系數(shù)adW/(m2oC)查附錄三圖46.536灰污系數(shù)m2oC/W查附錄二表0.00737管壁灰污層溫度thboCtpj+(+1/a2)BjQp/(Apjz*3.6)829.2038輻射放熱系數(shù)afW/(m2oC)查附錄三錄得a0,af=aa0111.1439利用系數(shù)查附錄三圖0.9540煙氣對(duì)管壁的放熱系數(shù)a1W/(m2oC)(add/(2s2xhp+af)166.4741對(duì)流傳熱系數(shù)kW/(m2oC)64.9642較大溫差tDoCTp-tp783.2743較小溫差tXoCTp-tp596.5044平均溫差toCtD/tX=1

57、.311.7, t=(tD-tX)/2.3lg(tD/tX)431.1917傳熱系數(shù)kW/(m2oC)選取7518計(jì)算對(duì)流受熱面積Agrjsm2BjQgrd/(kt*3.6)1028.4619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Alm20.785dn20.00057226523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

58、/s1-2=104.7選取10426每排管子根數(shù)n1根n/z1327每根管子長度lmAgrjs/z1n1d27.9928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每根管子長度lpjm按布置圖3-8結(jié)構(gòu)尺寸計(jì)算27.6131布置的對(duì)流受熱面積Agrbzm2dlpjn1z11020.0032誤差A(yù)%(Agrbz-Agrjs)/Agrbz*100-0.83二二、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*m

59、m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Am20.1797煙氣進(jìn)口流通面積Am2據(jù)圖3-8計(jì)算46.188煙氣出口流通面積Am2據(jù)圖3-8計(jì)算42.109煙氣平均流通面積Apjm22AA/(A+A)44.1010輻射層有效厚度S m0.16511計(jì)算對(duì)流受熱面積Agrjsm21020.0012爐頂附加受熱面積Afjldm2據(jù)圖3-8計(jì)算19.9013水冷壁附加受熱面積Afjslbm2據(jù)圖3-8計(jì)算58.10三三、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

60、過熱器熱力計(jì)算2 n1 10.785d n z1 22s s4 0.9d(-1)dppj1 1dl n zp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=Thp1037.002煙氣進(jìn)口焓HkJ/kgH=Hhp10286.513蒸汽進(jìn)口焓hkJ/kg(D-Djw2)hp+Djw2hgz)/D3119.34蒸汽進(jìn)口溫度toC查蒸汽特性表，p=14.01MPa434.15蒸汽出口溫度toC已知5406蒸汽出口焓hkJ/kg查蒸汽特性表3437.477過熱器吸熱量QgrkJ/kgD(h-h)/Bj1914.578爐頂附加受熱面吸熱量QfjldkJ/kg假定479水冷壁附加受熱面吸熱量Q