锅炉课程设计计算阜新烟煤VIP专享VIP免费

汽包顶棚管低温对流过热器屏式过热器高温对流过热器冷段高温对流过热器热段汽轮机一次喷水减温水二次喷水减温1绪论1.3锅炉计算的基本资料1.3.1锅炉规范(1)锅炉额定蒸发量：De=220t/h=220×103kg/h；(2)给水温度：=215；(3)过热蒸汽温度：=540；(4)过热蒸汽压力（表压）：pgr=9.8(5)制粉系统：中间储仓式（热空气作干燥剂、钢球筒式磨煤机）,漏风系数为0.1；(6)燃烧方式：四角切圆燃烧；(7)排渣方式：固态；(8)环境温度：20；(9)蒸汽流程:如图1-2；图1-2锅炉蒸汽流程图(10)烟气流程：炉膛→屏式过热器→高温对流过热器→低温对流过热器→高温省煤器→高温空气预热器→低温省煤器→低温空气预热器；(11)烟气受热面的布置见文献1。11.3.2过量空气系数和漏风系数表1-1锅炉各受热面的空气过量系数及漏风系数烟道名称过量空气系数漏风系数入口出口炉膛1．20．05屏、凝渣管1．21．20高温过热器1．21．2270．025低温过热器1．2271．2540．025高温省煤器1．2541．2770．02高温空气预热器1．2771．3330．05低温省煤器1．3331．3560．02低温空气预热器1．356`1．4110．05注：在D<70%De时，漏风系数的选取是根据经验先确定额定负荷下的漏风系数,然后由非额定负荷与额定负荷的比值进行漏风系数的修正，本文中取D=De,故不用进行修正。1.3.3各种负荷下汽水侧各点压力值表1-2各种负荷下汽水侧各点压力值位置低温省煤器入口高温省煤器入口高温省煤器出口汽包低温过热器出口屏式过热器出口高过冷段出口高过热段出口压力11．0210．8210．6810．6110．2910．1010．039．91.3.4燃料特性表1-3煤质资料表格22辅助计算2.1燃料燃烧计算2.1.1理论空气量和理论烟气量的计算表2-1锅炉燃烧计算汇总表序号项目名称符号单位（标准状况下）计算公式及数据结果1理论空气量Vo0.0889（Car+0.375Sar）+0.265Har由参考文献2，3-59式-0.033Οar4.922理论氮容积VN2o0.8Nar100+0.79Vo3.8893RO2容积VRO2o1.866Car100+0.7Sar1000.9084理论干烟气容积VgyoVN2o+VRO24.8075理论水蒸气容积VH2Oo1.11Har100+1.24Mar100+1.61dKVo(dk=0.01kg/kg)0.6276飞灰份额αfh查表0.933序号项目名称符号数值单位1碳48．3%2氢3．3%3氧8．6%4氮0．8%5硫1．0%6水分15%7灰分23%8低位发热量18645KJ/kg9可燃质挥发份41Kcal/Kg4表2-2烟气特性表序号项目名称符号单位（标准状况下）炉膛屏凝渣管高过低过高温省煤器低温省煤器低温省煤器低温空预器1受热面出口过量空气系数1.21.231.261.281.311.331.4112烟道平均过量空气系数1.21.2151.2541.271.2951.321.3453干烟气容积5.7825.8556.0036.1256.2946.3726.4954水蒸气容积+0.0161-1)V00.6430.6440.6460.6490.6540.6520.6545烟气总容积6.4526.56.656.7746.97.027.156RO2容积份额-0.1410.140.1370.1340.1320.130.1277水蒸气容积份额0.10.0990.0970.09570.09420.09290.09158三元子气体和水蒸气容积总份额0.2410.240.2340.230.2260.2230.2199容积飞灰浓度33.2932.9132.1731.583130.4729.92510烟气质量8.488.588.778.939.099.259.4111质量飞灰浓度afhAy100Gy0.0250.02490.02440.0240.02350.02310.02282.1.2烟气和空气焓的计算：表2-3焓温表（炉膛、屏、高温过热器）烟气或空气温度ϑ（∘c）理论烟气焓理论空气焓理论烟气焓增Δhyo炉膛、屏、凝渣管高温过热器α''=1.25α''=1.275hyΔhyhyΔhy4003141.42665.53749.03754.68842.21002.11002.95003983.63366.014751.14758.59881.2110461028.856004864.864082.325797.25786.43868.741053.621054.197005733.64813.336696.26840.63905.231071.271075.888006638.835555.277749.87916.526920.271088.231093.689007559.16309.018820.99010.20935.61104.721110.9910008494.77071.529909.0510121.201127.98949.71117.3511009444.47846.8211.13.7811249.38961.11132.291140.531200104068626.9212130.9112389.72974.01139.301156.031300113809418.1113264.213545.74980.01149.531163.2714001236010241.914402.517709.01989.61158.731173.5415001334911015.3915552.115882.569971168.101182.9416001434611822.1716710.817065.5010071170.141192.3817001535312631.3118257.8710081...