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1、课程设计报告名称：锅炉课程设计题目：DG1025th锅炉热力计算一、任务书1二、设计内容1一、课程设计的目的与要求11.1 目的11.2 要求1二、设计正文11燃烧产物计算2炉膛计算（结构、阻力、传热）3水平烟道计算（结构、阻力、传热）4转向室计算（结构、阻力、传热）5低温过热器计算（结构、阻力、传热）6省煤器计算（结构、阻力、传热）7空气预热器计算（结构、阻力、传热）8锅炉本体效率校核9喷水量校核10结构汇总表H阻力汇总表12水、蒸汽、空气、烟气温度汇总表13喷水量校核汇总表14锅炉效率校核15参考文献锅炉原理课程设计任务书一、目的与要求1 .熟悉前苏联1973年锅炉热力计算方法；2 .对东
2、方锅炉厂1025th锅炉进行校核设计；二、主要内容1 .锅炉受热面结构计算2 .锅炉水、水蒸汽、烟道阻力计算3 .锅炉100%ECR工况热力计算三、进度计划序号设计（实验）内容完成时间备注1燃料特性计算2014.8.2525日开始2烟气焰计算2014.8.263炉膛结构、阻力、热力计算2014.8.274水平烟道结构、阻力、热力计算2014.8.285转向室结构、阻力、热力计算2014.8.296竖井烟道结构、阻力、热力计算2014.9.17空预器结构、阻力、热力计算2014.9.28喷水量校核2014.9.39整理数据，撰写热力计算书，打印2014.9.45日下午结束10答辩2014.9.5
3、5日下午结束四、设计（实验）成果要求1 .按照教务处要求，提交课程设计报告。2 .每天上午10：00,下午3：00签到。3 .集体答疑，讲解难点。4 .本次课程设计共分为63组，以小组形式答辩。五、考核方式1 .提交课程设计报告。2.参加答辩。指导教师:二、设计内容已知条件表11锅炉参数符号数值1.1 锅炉额鳏发量D935t/h1.2 再热器蒸汽流量DZr788.5t/h1.3 过热器由口赛汽S力1pi17.33MPa1.4 汽包压力（假定）Pdrum18.83MPa1.5 顶棚+覆进口/出口压力p7p18.8318.731.6 低过进口屈口压力p/p”18.7318.331.7 大屏（前屏）
4、进口/出口压pp18.3318.03力1.8 后屏进口/出口压力p/p”18.0317.731.9 高过进口/出口压力p/p”17.7317.3$1.10 再热器入口蒸汽压力pi276MPaMl再热器出口蒸汽压力pji2358MPa1.12 低温再热器进口/出口压力p/p”3.763.7L13中温再热器进口/出口压力p7p”3.73.641.14 高温再热器进目/出口压力p，/p”3.64F581.15 过热器出口蒸汽温度t5401.16 再热器入口蒸气温度i3211.17再热器出口蒸汽温度t,25401.18再热蒸汽平均压力P2pj3.67MPa1.19给水温度tgs2701.20给水压力（
5、假定）PgS19.33MPa1.21给水焙IgS1182.08kJ/kg1.22一次风温trk,l3701.23二次风温trk,23612所选煤种连州煤Vdaf1500可磨系数K=1.23制粉系统钢球磨煤机，中间储仓式、热风送风4进风温度暖风器关闭20暖风器开启705飞灰占灰分的质量份额afh=0.92-6 飞灰平均粒径13m7 飞灰浓度Gfh=Aar*afh/100=0.296kg/kg2.2燃烧产物计算表21理论空气量Vk0vn20NmVkg4.9702理论氮气容积NmVkg3.9373三原子气体RO?的容积VDAONmVkg0.9994理论水蒸汽容积IXU乙Vh200NmVkg0.306
6、5理论烟气容积V0Vym3kg5.243空气平衡表表3入口过量空气系数出口过量空气系数漏风系数受热面名称名称,Haa炉膛Fnc1.21.250.05大屏过热器F-SH1.251.250壁式再热器W-RH1.251.280.03后屏过热器R-SH1.281.280中温再热器MT-RH1.281.290.01后水引出管RW-Out1.291.290高温再热器HT-RH1.291.320.03后后墙水冷壁管束RRWWT1.321.320高温过热器HT-SH1.321.350.03悬吊管H-T1.351.350低过垂直段LT-SH-V1.351.360.01转向室R-D1.361.370.01低温过热
7、器LT-SH1.371.380.01省煤器ECO1.381.390.01空气预热器APH1.391.510.12烟气特性表4项目名称符号单位FncF-SHW-RHR-SHMT-RHRW-OutHT-RHRRWWTHT-SHH-TLrPSH-VR-DLT-SHECOAPH烟道进口过量空气系数，-1.2001.2501.2501.2801.2801.2901.2901.3201.3201.3501.3501.3601.3701.3801.390烟道出口过量空气系数a,-1.2501.2501.2801.2801.2901.2901.3201.3201.3501.3501.3601.3701.380
8、1.3901.510烟道平均过量空气系数aPj-1.2251.251.2651.281.2851.291.3051.321.3351.351.3551.3651.3751.3851.45过剩空气量VNm3Zkg1.11821.24251.31701.39151.41641.44121.51581.59031.66491.73941.76431.81401.86371.91342.2364水蒸汽容积Vh20Nm3Zkg0.32420.32620.3274032860.32900.32940.3306033180.33300.3342033460.33540.33620.33700.3422烟气总
9、容积VyNm3Zkg6.37896.50516.58096.65666.68186.70716.78286.85866.93437.01017.03537.08587.13637.18687.5151烟气中RCh气体容积分额RO2-0.15670.15360.15190.15010.14960.14900.14740.14570.14410.14260.14210.14110.14010.13910.1330烟气中水蒸汽容积分额H2O-0.05080.05010.04980.04940.04920.04910.04870.04840.04800.04770.04760.04730.04710.
10、04690.0455烟气中R02和HzO总的容积分额n-0.20750.20380.20160.19950.19880.19810.19610.19410.19220.19030.18960.18840.18720.18600.1785烟气质量Gykg/kg8.62958.79178.88918.98649.01899.05139.14879.2461934349.44089.47329.53819.60309.668010.0898飞灰无因次浓度Phkg/kg0.03430.03360.03330.03290.03280.03270.03230.03200.03170.03130.03120
11、.03100.03080.03060.0293理论烟气焰理论空气始飞灰焰Ifh炉膛F-SHHT-RHRRWWTHT-SHH-TLT-SH-VR-DI；GthCmFncaPjaPjaPjapjapjaPjawkj/kgkj/kgkj/kgpj1.251.3051.32L3351.351.3551.36510072665623.71.2259149509609699799829892001472132149.789718521925194419641984199120043002240199876.91819281629262956298630163026304640030322688105.62
12、766381039573998403840784092411950038473394136.43742483250195070512151725189522360046754117163.94748586960956157621962806301634270055284861196.75766694072077280735374267450749980064045609227.86818803483428427851185958623867990073016357240.278949130948095759670976697979861100078997125297.3897199771036
13、91047610583106901072510797HOO91147915333.69799114261186111980120991221712257123361200100288704373.011228125771305513186133171344713491135781300109619494421.8123591375614279144211456314706147531484814001191510304468.2135191495915526156801583515989160411614415001285511114525.61470116159167701693717104
14、17270173261743716001381111924578.8158811737118027182061838518563186231874217001477312734652.5170731860919309195001969119882199462007318001573613545713.4182901983620581207842098721190212582139319001671614376776.4194972108621877220922230822524225962273920001768515207842.1207272232923166233942362223850
15、239262407821001867116038910.4219492359124473247132495425194252752543522001965716869981.72319024856257842603726290265432662726796OLT-SHECOAPH空预器冷段waPjaPj13751.3851.451.51100996100210451084.1562002017203021162195.5483003066308632163335.7464004146417243474508.4855005257529155115714.92160063836425669269
16、39.2247007547759679128203.5768008735879191569492.24900992599881040110782.7100O10868109391140211829.67HOO12415124941300913483.82120013665137521431814839.84130014943150381565516224.79140016247163501702017638150017548176591838219048.66160018861189811975620471.25170020201203282115621919.7180021529216642
17、254523357.36190022883230272396124823.73200024230243822537026282.87210025595257562679827760.34220026964271332823029241.662.3 锅炉热平衡及燃料消耗量计算表6序号名称符号单位计算公式及数据源数值1燃料带入热量QrkJ/kg7J0ar.nct188102排烟温度py假定1293排烟焙IPykJ/kg查培温表14064空预器出口过量空气系数aPy-烟气特性表1.5105冷空气温度tlkc已知206理论冷空气焰Iik0kJ/kg查培温表1317机械不完全燃烧热损失q4%取用48化学
18、不完全燃烧热损失q3%取用09排烟热损失q2%仁=(G1)GJxl00Q.QtIIooJ6.16710散热损失%文献1,图4-30.1811燥的灰分Aar%已知32.1512判断-044.913灰渣物理热损失%419,忽略q6014保热系数(P-1q1000.99799225915锅炉总热损失q%-210.3516锅炉热效率ng%100-q89.6517过热蒸汽焙b”kJ/kg查水蒸汽特性表，17.33MPa,5403397.1618给水焙IgSkJ/kg已知1182.0819过热蒸汽流量Dgrkg/h已知93500020再热蒸汽出口熔izr”kJ/kg查水和水蒸汽特性表，3.58MPa,54
19、03541.4321再热蒸汽入口焙ikJ/kg查水和水蒸汽特性表，3.76MPa,321C3025.7622再热蒸汽流量DZrkg/h己知78850023再热蒸汽焰增izrkJ/kgizr-izr,515.6724锅炉有效利用热QgikJ/h4V)+2(2.48E+0925实际燃料消耗量Bk&h亿(710)0r14692526计算燃料消耗量Bjkg/h1loo.1410482.4 炉膛的热力计算炉膛、大屏、壁再、燃烧器结构计算表7序号名称符号单位公式结果1水冷壁管径dmm已知63.5lmm已知7.52横向节距S1mm已知76.23侧墙面积F1m2些IZ型X4.415244.01Rm212.89
20、28.456366.80Fam2空竺+1009,3.337238.34F.m26.086x12.6101.56(0.905+1.403x3+0.5+0.938)15.5FCnr+苍+550.704前墙面积FUm2(7.045/2+5.295+47.32)X13.335748.595后墙面积Fhm2(7.045/2+5.295+28.456+4.356)x13.335555.136出口窗面积FChm2(15.5+1.473+0.82)13.335237.277炉顶面积Hm1116.55213.33587.378大屏面积Fqpm224(15.54.209)652.409燃烧器、门孔等面积Frm24
21、X0.862X(0.438+0.494+9.965)+2.4=39.97,取404010前后侧墙水冷壁角系数X-按照膜式水冷壁取用1.011炉顶角系数XId-查附录三图I(a)4,sd=114.3/48.5=2.356,e=00.5912前屏角系数Xqp-查附录三图I(a)1,e1.4d,sd=6151=l.1960.9813炉膛出口烟窗处角系数XCh选取1.0014整个炉膛的平均角系数02&+4+尸石+&+&+s0.98615大屏区的侧墙面积FXm2据炉膛结构图，2X15.5X4.709146.016大屏区的炉顶面积FqPJdm2据炉膛结构图，13.335X4.70962.7917大屏区的炉
22、墙面积Fgm2FIitwM+Fsowra208.7718炉膛自由容积的水冷壁面积Lm2Fq+耳+2:ff%J+Fc+Fd-FqPJd248119炉膛容积V1m3Fff（XI3.335734420前屏占据容积Vpm3据炉膛结构图,13.335X15.5X4.709973.321炉膛的自由容积VZym3V-Vp637022大屏区域炉膛的水平分割面积Ff,由m2据炉膛结构图，13.335X4.70962.823大屏区与炉膛的垂宜分割面积Ff.ehm2据炉膛结构图，13.335X15.5X2413.424自由容积的辐射层有效厚度Sxym36%9.2425前屏间容积的辐射层有效厚度Spqm3吗/（%+F
23、屏区+%+%）2.6226炉膛的辐射层有效厚度Sm36%L片区Vzy（%+F大屏+F鼻区）F屏区+FZyV1J8.4427燃烧器中心线高度Nm据炉膛结构图13.81328炉膛高度H1m据炉膛结构图43.98529燃烧器相对高度hrH1-h,.H10.3130火焰中心相对高度x-hrH1+,AX按照附录二表III,查得为00.3131系数BB一附录H表V0.5632系数CC一附录H表V0.5033系数M一B-CXl0.4034炉膛横截面积A1m213.335X12.89171.8935壁式再热器管径d2mm已知6036壁式再热器壁厚2mm已知437壁再前墙管子根数11根己知18038壁再左（右）
24、侧墙管子根数n2根已知9039壁式再热器受热面积Htem2已知413.8壁再角系数XbZ查附录三图I(a)4,sd=60.69/60=1.0115,e=016I(XM)10090t552I&50041500C)z 421632H00(I335)杀一VVA fSp HXe 图克2O7M第烧M中心线13*04H507(HS12002.4 炉膛热力计算（含大屏、壁再）表8序号名称符号单位计算公式或数据来源数值1热空气温度%二次风温3612理论热空气焙I0rkkj/kg查燧温表524193炉膛漏风系数1一查空气平衡表30.054制粉系统漏风系数aZf一文献1,表4-30.065冷空气温度己知206理论
25、冷空气焙I0lkkj/kg查熔温表5377空气预热器出口过量空气系数二ocx-1-zf1.148空气带入炉内热量以kj/kg瓜或+（幽+八七可|27629Ikg燃料带入炉内热量Qkj/kg100-742157210理论燃烧温度.,C根据。查焰温表5,炉膛196911炉膛出口烟气温度oi假定123812炉膛出口烟气始r1kj/kg查培温表51280013烟气平均热容量VCPjkJ(kg0C)(0T)/()12.014水蒸汽容积分额口设。-烟气特性表0.050815三原子气体容积份额一烟气特性表0.207516三原子气体分压力PnMPaprn=0.098rll0.02017炉膛的辐射层有效厚度Sm
26、炉膛、大屏、壁再、燃烧器结构表8.44318Pn与S的乘积PnSmMPaPnS0.17219三原子气体辐射减弱系数Ky1/(mMPa)10r058+L6sOIMnSJM7福2.45720飞灰的平均直径m已知1321灰粒子辐射减弱系数Khl(mMPa)55900(6(,+273)dh276.822焦炭粒子辐射减弱系数Kjl(mMPa)取用1023无因次量Xl-按照文献2选取0.524无因次量X-按照文献2选取0.125飞灰无因次浓度Uhkg/kg烟气特性表0.034326半发光火焰辐射减弱系数K1/(mMPa)KyG+Kh4+产产23.64227烟气的压力PMPa近似取98.0kPa0.0982
27、8乘积KpSKpSKpS3.029炉膛火焰有效黑度ahy一1-exp(-KpS)0.95130自由容积的辐射层有效厚度Szym炉膛、大屏、壁再、燃烧器结构表9.24431乘积PnSZymMPaPnSXy0.18832自由容积内三原子气体辐射减弱系数Kzyl(mMPa)2.331JO7,+L6%o0;J收7铜33乘积KzypSzy一KXyPSxy2.1134自由容积的火焰有效黑度1-exp(-KzypSzy)0.87935前屏间容积的辐射层有效厚度SPqm炉膛、大屏、壁再、燃烧器结构表2.62036乘积PnSPqmMPaP11Spq0.053337屏间容积内三原子气体辐射减弱系数Kpql(mMP
28、a)100.78+L6hojh：o-0.1I网Spq,fl-0.37+27310004.7638乘积KPqPSKIKIPSPq1.2227Pq39屏间容积的火焰有效黑度Cl,一l-exp(-KlxpSw)0.70640屏宽AAm据炉膛结构图4.70941屏宽A与Sxy比值ASzy一A/Szy0.5142屏的节距Sim据炉膛结构图3.42943屏的节距一s1)11.37344假想窗口尺寸1m据炉膛结构图15.50045系数一B=s1l0.22146屏的修正系数CP一查附录三图V(b)0.91078726847屏区的修正系数CPq一查附录三图V(b)0.84739734448系数T“-查附录三图V
29、(a)1.57631668449屏的辐射系数*P查附录三图V(c)0.10514185650屏区的辐射系数一查附录三图V(d)0.00783375751屏的黑度一0.79052屏区的黑度apq一pi+。PqCPqazy0.71153屏的曝光不均匀系数Zp一apay0.89954屏区水冷壁的曝光不均匀系数Zpq一p3y0.81055计入曝光不均匀的屏的面积F:m577.856计入曝光不均匀的屏区面积F11520.557炉墙总面积FIq11rL+Fqp+Fpq357958前后侧墙水冷壁的沾污系数查附录二表IV,无烟煤,ClhdkWm2为斓100.182炉顶辐射受热面积F,mm(耳j-m)Fd+/M
30、XNPq65.3483炉顶吸热量QldW片Md653884炉膛内炉顶过热器辐射吸热量QrMkj/kg1673600几%/485前屏入口相对高度hH1一(4415+28456+3337)/439850.8286前屏辐射吸热分布系数nqp一查附录三图Vll0.815387前屏辐射热强度QqpWm27078688前屏吸热量QqPW/qpXqpIqp4525673689前屏辐射吸热量Qkj/kg1155.136%yqp/与90后屏入口相对高度hH1一(51.735-15.5/2)/43.9851.091后屏辐射吸热分布系数nhP一查附录三图Vil0.642092后屏辐射热强度(1Wm2PJ557409
31、3后屏吸热量QhPW(居p=J1.3225E+0794后屏及其后对流过热器吸收的炉膛辐射热量Qfhpkj/kg36FhpqBj33895附加过热器总吸热量Qijkj/kg先假定，后校核42996主蒸汽流量Dkg/h已知93500097一级减温水Du1kg/h先假定，后校核11000量98二级减温水量Dj4kg/h先假定，后校核300099附加过热器焰增ifjkj/kgj(n-njwl-njw2)65.7100饱和蒸汽焰Ibqkj/kg查水蒸汽特性表，18.83MPa2473.47101包覆出口蒸汽始ibfkj/kgil-qit.2539102包覆出口蒸汽温度tbfC查水蒸汽特性表，18.73MPa363.03103前屏焰增AiqPkj/kg36Qp。一2Wl-OjW2177104前屏出口蒸汽培1qpkj/kg%+iqp2716105前屏出口蒸汽温度tLqp查水蒸汽特性表，18.03MPa373.39106炉膛出口烟气温度校核1Q假定值
