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1、电气工程学院锅炉课程设计课题名称：220t/h煤粉锅炉热力设计专业、班级：热能与动力工程、热动111指导教师：龚德鸿 姓 名：李学玉 学 号：11080402651、 设计题目：220t/h煤粉锅炉热力设计2、 原始资料：锅炉额定蒸发量：De=220 t/h=220103 kg/h给水温度： tgs =215过热蒸汽温度： tgr=540过热蒸汽压力： pgr=9.8MPa制粉系统：中间仓储式（热空气作干燥剂、钢球筒式磨煤机）燃烧方式：四角切圆燃烧排渣方式：固态环境温度：20 一次减温喷水蒸汽流程：汽包顶棚管低温对流过热器屏式过热器高温对流过热二次减温喷水 器冷段 高温对流过热器热段汽轮机烟气
2、流程：炉膛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锅炉受热面的布置结构如右图：本组选用的燃料为新汶煤，首先要对燃料的应用基成分进行校核，本燃料校核是100%， 元素成分（%）收到基低位量（kJ/kg）干燥无灰基挥发分Vdaf (%)空气干燥基水Mad（%）BT法可磨性系数Kkm灰熔点水分灰分碳氢氧氮硫变形温度DT()软化温度ST()熔化温度FT()MarAarCarHarOarNarSar618.8604.16.81.42.9251404021.412001500 表1-7新汶烟煤煤质分析数据表2-8 燃烧计算表 序号项目名称符号单位计算公式及数据结果1理论
3、空气量/kg0.0889(+0.375)+0.265-0.03335.2258778752理论氮容积/kg0.8+0.794.1516435213容积/kg1.866+0.71.13994理论干烟气容积/kg+5.2915435215理论水蒸汽容积/kg11.1+1.24+1.61(=0.01kg/kg)0.6136366346飞灰份额查表2-40.8三、空气平衡量及焓温表 表2-9烟气特征表序号项目名称符号单位 炉膛，屏凝渣管高过低过高温省煤器高温空预器低温省煤器低温空预器1漏风系数0.050.0250.0250.020.050.020.052受热面出口过量空气系数_1.21.2251.25
4、1.271.321.341.393烟道平均过量空气系数_1.21.21251.23751.261.2951.331.3654干烟气容积 m3/kg6.3367190966.402042576.5326895176.6502717696.8331774947.016083227.1989889465水蒸气容积m3/kg0.6304639610.6315156680.6336190840.6355121590.6384569410.6414017230.6443465056烟气总容积 m3/kg6.9671830577.0335582387.1663086017.2857839277.471634
5、4357.6574849437.8433354517RO2容积份额 _6.3367190966.402042576.5326895176.6502717696.8331774947.016083227.1989889468水蒸气容积份额 _0.6304639610.6315156680.6336190840.6355121590.6384569410.6414017230.6443465059三原子气体和水蒸汽溶剂总份额 r_6.9671830577.0335582387.1663086017.2857839277.4716344357.6574849437.84333545110容积飞灰浓度
6、 g/m321.5869166621.3832024920.9870950820.6429399420.1294644819.6409135819.1755154411烟气质量 mykg/kg9.0019958069.0873082629.2579331759.4114955969.6503704749.88924535110.1281202312质量飞灰浓度 ykg/kg1.3539001691.3667311631.3923931491.4154889381.4514157191.4873425011.523269282续表（2） 烟气焓、空气焓、蒸汽焓的计算：炉膛、屏式过热器、高温过热器
7、、低温过热器、高温省煤器、高温空气预热器、低温省煤器、低温空气预热器等所在烟气区域的烟气在不同温度下的焓，并列成表格作为温焓表。具体见下表 。表 2-10 烟气焓温表（用于炉膛、屏式过热器、高温过热器计算）烟气或空气温度（）理论烟气焓h0y（kJ/kg）理论空气焓h0k（kJ/kg）理论烟气焓增（每100）h0y炉膛、屏、凝渣管高温过热器=1.2=1.225hyhyhyhy4003450.0240732831.1715984376.2583934141.181683927.04553941174.3680891109.2853085004377.0696133575.2843485550.62
8、64825250.4669911132.443911385.9110221318.867436005509.5135224336.1199086936.5375046569.334422795.61906931054.311256985.87413967006305.1325925112.5808437990.848767555.208561997.33419931258.9466761190.2898368007302.4667915900.6432269249.7954368745.4983971012.616971279.4378681208.8006619008315.08376167
9、01.24771710529.23339954.2990571031.7627341303.8440441230.55074810009346.8464957511.1542711833.0773511184.849811045.8484561322.5576751247.991127110010392.694958334.70036413155.6350212432.840931058.3602331334.0728211261.330894120011451.055189163.26330114489.7078413694.171831072.2731531394.3478371284.5
10、18773130012523.3283410003.6367215884.0556814978.69061078.7616061459.0277911300.920464140013602.0899410849.9676417343.0834716279.611061088.8805011445.9305671308.311625150014690.9704411700.2179718789.0140417587.922691097.486911340.8748011301.127087160015788.4573512557.1574320129.8888418889.049781108.5
11、046331516.3942081337.374805170016896.9619913416.605321646.2830520226.424581107.663571397.6158561318.857091180018004.6255614276.3667323043.898921545.281671116.5874851465.1004511339.084172190019121.2130415148.9315624508.9993622884.365841119.2055471447.5094781338.459069200020240.4185916020.4512125956.5
12、088324222.824911129.7268491433.5149281346.739638210021370.1454416899.3916127390.0237625569.564551126.7882061422.2209261342.198016220022496.9336417776.5552128812.2446926911.76257表2-11 烟气焓温表（用于低温过热器、高温省煤气的计算）烟气或空气温度（）理论烟气焓h0y（kJ/kg）理论空气焓h0k（kJ/kg）理论烟气焓增（每100）h0y低温过热器高温省煤器=1.25=1.27hyhyhyhy3002548.4152392104.408761 3114.1779093156.266085901.60883451097.7830631112.318324003450.0240732831.1715984211.9609734268.584405927.04553941127.8881271142.7703825004377.0696133575.2843485339.84915411.354787
