锅炉机组热力计算(完整版)

温度(cθ)CO2(cθ)N2(cθ)O2(cθ)H2O(cθ)a(cθ)ash飞灰焓理论烟气焓202610016913013215113280.824789200357260267304266169.1501599300559392407463403263.77824354007725275516265423601063297500996664699794684458.513541806001222804850967830559.81655080700146194610051147979663.2196600680017041093116013351130767.22266959900195112431319152412818742587930100022021394147817251436984290891611002457154516371926159510963239906120027171695180021311754120635610898130029761850196323441913136040111927140032402009212725582076157146312994150035042164229427792239175851914041160037672323246130012403183054015070170040352482262932272566206661016154180043032642279634582729218464417209190045712805296836882897238570418301200048432964313939263064251274119363210051153127330741613232264077920440220053873290348343993399276081421516理论空气焓实际烟气焓炉膛出口dlgrgzrdzr,psmsmky(热段)ky(冷段)1341.21.251.281.311.341.441.54678948982100310231043111111791367192219902031207221142250238720712927303130933155321734243631278639604099418342664350462949073516501851945299540555105862621442666099631264406568669671237549503272087459761077617912841589195808834786388812898691609741103226584950598341003210229104271108511743738110682110511127311494117161245413192819811869122791252512771130171383714656901613057135081377814049143191522116122983314294147861508115376156711665417638106711559116125164451676517085181521921911509168611743617782181271847219623207741235218080186971906819438198092104422279131891940120060204562085221248225662388514027206592136121781222022262324026254281489121983227282317523621240682555727046157492325424042245142498725459270342860916613245412537225870263692686728528301901747125824266982722227746282703001731765项目名称l,hpdlgrgzrdzr,psmsmky烟道进口α'1.21.21.251.281.311.34本级Δα00.050.030.030.030.2烟道出口α''1.21.251.281.311.341.54烟道平均α(pj)1.21.2251.2651.2951.3251.44过剩空气ΔV1.0281.1571.3621.5161.6712.262水蒸汽容积V（H2O）0.5170.5190.5230.5250.5280.537烟气总容积Vy6.5466.6756.8807.0347.1897.780RO2份额0.1450.1420.1380.1350.1320.122H2O份额0.0760.0750.0730.0710.0700.064RO2+H2O份额0.2220.2170.2110.2060.2020.186烟气质量Gy8.7288.8969.1649.3659.56710.339飞灰无因次浓度μ(h)0.0340.0330.0320.0320.0310.029Car50.74V(空气)5.140主汽温度400Har2.9V(RO2)0.950再热汽流量330Oar4.54V(N2.o)4.067汽包压力15.2Nar0.85V(H2O)0.501给水压力15.7Sar0.45理论Vdg5.017主气压力13.7Aar32.78理论Vg5.518过热汽温540War7.74r(RO2)0.172再热汽出口压力2.3Vdaf23.2r(H2O)0.091再热汽出口温度540Qar,net19200再热汽进口压力2.5t11500再热汽进口温度330t21500t31500各参数选取飞灰系数0.9序　号名　　称符　号单　位计　算　公　式　或　数　据　来　源1燃料带入热量QrkJ/kg≈Qydw2排烟温度θpyoC假定3排烟焓HpykJ/kg查焓温表3-3(空气预热器)4冷空气温度IlkoC给定（锅炉车间工作温度）5理论空气焓HolkkJ/kg查焓温表3-3(理论烟气焓)6机械不完全燃烧热损失q4%取用7化学不完全燃烧热损失q3%取用8排烟热损失q2%9散热损失q5%查图2-1510灰渣物理热损失q6%11保热系数φ12锅炉总热损失∑q%q2+q3+q4+q5+q613锅炉热效率ηgl%100-∑q14过热蒸汽焓hgrkJ/kg查蒸汽特性表，p=13.8MPa,t=540oC15给水焓hgskJ/kg查水特性表，p=15.7MPa,t=235oC16过热蒸汽流量Dgrkg/h已知17再热蒸汽出口焓hzrkJ/kg查蒸汽特性表，p=2.4MPa,t=540oC18再热蒸汽进口焓h'zrkJ/kg查蒸汽特性表，p=2.6MPa,t=330oC19再热蒸汽流量Dzrkg/h已知20再热蒸汽焓增量△hzrkJ/kghzr-hzr'21锅炉有效利用热QglkJ/hDgr(hgr-hgs)+Dzr(hzr-hzr')+Dpw(I'-Igs)22实际燃料消耗量Bkg/hQgl/(ηglQr)23计算燃料消耗量Bjkg/h锅炉热平衡及燃料消耗量计算1001001)(/42rolkpypyrQqHHQQ(419yydwQA忽略)551qq－η+10014qB,,.arnetprartrQrQC数　值192001301510.0201341.506.690.3500.9968.591.534361016400000355130793300004721.126E+096413363171锅炉热平衡及燃料消耗量计算序　号名　　称符　号单　位1炉膛容积热强度qVW/m32炉膛容积Vlm33炉膛截面热强度qFW/m24炉膛截面积Alm25炉膛截面宽深比a/b6炉膛宽度am7炉膛深度bm8冷灰斗倾角θ9冷灰斗出口尺寸m10冷灰斗容积Vhdm311折焰角长度lzm12折焰角上倾角θ上13折焰角下倾角θ下14前屏管径及壁厚d×δmm15前屏管内工质质量流速ρwkg/(m2·s)16前屏管子总流通面积Am217前屏每根管子面积A1m218前屏总管子数n根19前屏横向管距s1mm20前屏片数z1片21前屏单片管子数n1根22前屏纵向节距s2mm23前屏最小弯曲半径Rmm24前屏深度bqpmm25前屏与前墙之间距离mm26前后屏之间距离mm27炉膛出口烟气流速wym/s28炉膛出口烟气温度tloC29炉膛出口通流面积Achm230炉膛出口高度hchm31前屏高度hqpm32水平烟道烟气流速wsym/s33水平烟道高度hsym34折焰角高度hzym炉膛结构设计(带前屏过热器)（一）炉膛尺寸的确定35炉顶容积Vldm336炉膛主体高度hltm1前后墙水冷壁回路个数z1个2左右侧墙水冷壁回路个数z2个3管径及壁厚d×δmm4管子管距smm5前后墙管子根数n1根6左右侧墙管子根数n2根（二）水冷壁计　算　公　式　或　数　据　来　源数　值按表2-11选取150000BQdwy/(3.6qv)2280按表2-12选取3500000BQdwy/(3.6qF)98按a/b=1～1.2选取1.1选取a值使a/b=1～1.210.4Al/a9.4按θ≥50o50按0.6～1.4选取1.2按图3-5A4部分结构尺寸计算1873.13按θ上=20o～45o选取45按θ上=20o～30o选取30取用38×4.5384.5按表2-21选取10000.1080566.61E-04A/A1164按s1=550～1500选取1350按a/s1-1选取7234275s2(n1-1)×2+2R1998选取1240选取780选取6按表2-20选取110096.3Ach/a9.3按hch选定9.53选取105.6按hqp-hsy-lz选取0.8炉膛结构设计(带前屏过热器)（一）炉膛尺寸的确定13b按选取)(42为内径nndd选取按d～R)5.25.1(2732733600lyyjtwVB2733600273jylsyBVtwa按选取1n7按选取2s/d=1.1~1.25按选取按图3-5中A1和A2部分尺寸计算54615.8399.7/2.5（按每个回路加热宽度≤2.5m选取）48.8/2.4（按每个回路加热宽度≤2.5m选取）4按表2-13选取60*6按s/d=1.3～1.35选取80按a/s+1选取131按b/s+1选取119（二）水冷壁)53(3部分高度中图AAVVVlhdldl序　号名　　称符　号单　位计算公式或数据来源数　值1一次风速w1m/s按表2-16选取302二次风速w2m/s按表2-16选取403三次风速w3m/s按表2-16选取504一次风率r1%按表2-15选取255三次风率r3%由制粉系统的设计计算确定的磨煤废气份额206二次风率r2%100-r1-r3557一次风温t1oC由制粉系统的设计计算确定2008二次风温t2oCtrk-103209三次风温t3oC由制粉系统的设计计算确定10010燃烧器数量z个四角布置411一次风口面积（单只）A1m20.13012二次风口面积（单只）A2m20.20213三次风口面积（单只）A3m20.14714燃烧器假想切圆直径djmm按表2-17选取80015燃烧器矩形对角线长度2ljmm1401916特性比值hr/br初步选定1217特性比值2lj/br由式(2-7)确定40.218燃烧器喷口宽度brmm结构设计定位42042019一次风喷口高度hlmmA1/br310二次风喷口高度h2mmA2/br481三次风喷口高度h3mmA3/br35020燃烧器高度hrmm按A1、A2、A3的要求，画出燃烧器喷口结构尺寸图（图3-4），得hr;核算hr/br=13.46,接近原选定值，不必重算569621最下一排燃烧器的下边缘距冷灰斗上沿的距离lm按l=(4～5)br选取1.722条件火炬长度lhym按图2-28示意的lhy（lhy=abcd折线度）的计算结果符合表2-19规定，而且上排烧器