锅炉原理作业

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1、作业（一）已知：某台锅炉燃烧烟煤，煤的元素分析成分为：Car=55.43%>Har=3.09%>Oar=4.13%>Nar=1.34%>Sar=0.34%>Aar=27.74%>Mar=7.93%>Vdaf=20」9%低位发热量为Qar,net=21270kJ/kg,飞灰系数色二0.9。按照烟气的流程锅炉的各受热面名称及漏风系数如下：炉膛出口及屏式过热器Q丄1・2800-2200°C高温对流过热器Aa=0.05500〜1000°C高温对流再热器Aa=0.03400〜900°C低温再热器Aa=0.03300~800°C省煤器Aa=0.03200〜600°C空预器热段Aa=

2、0.1100-400°C空预器冷段Aa=0.1100〜400°C求：1.理论空气量三原子气体容积3.理论水蒸汽容积4.理论氮气容积5.理论烟气容积6.烟气特性表（按各级受热面的进、出口平均过量空气系数為”计算）7•烟气焰温表（按各级受热面的出（进）口过量空气系数/计算）性表dlgr呻dz八p$m1.21.25U28U31LM■21.28u;n1.34U5J■■■•■——•1.2251.265U29n1.3251.14I.IOtlL30U1L4t7f11.594K2.15910.5318IU53490.53730.539了伏5488八16U159G.G1P6•巾19G・9

3、】157.1879」■■■••••••■U.13980<136bli.132612971).1198・U.U8290<08(H>1O."7940.0781103)733(><22270.2165n.2120(k2078i).ig：“&W38M594乩95169.14S99.笫仆80JJ36810.03S7UJW490.1)342行」3I6符V单位hhp烟道进口过虽空气系数“・1.2烟道出订过就空气系数a■1.2烟道平均过誥空气系数a利!.2过剧空气・AVNm1/kgD.9X11水英气容积VH1QNm5/kg1).、；298烟V总容枳",NmJ/k86.291ZR6气体占

4、烟气容积份额0.1126水媒汽占烟气容积竹额r»iO0.0842三原子花体和水媒汽占烟气容积总份额—r-m2测烟气庾量kg/kg8.3428飞观无闪次浓度kgg0.0375a»烟气的焙Wr(kf)高*再热器U3I1.283918496260347!31az54112957399850626157727811111t11{¥JW07210012V3017407751636279•-V—W—•■t1111~-.,.11•J••■MB■.)985空預罟超段I/q)-1.447»9104521153576H)70U61主省煤器■=1.3410324*/

5、13822S01162■—3412空预越冷段*序烟气(或空F温度(D理论烟气的焙W,(kJ/k8)理毬空气的熔矶OJ/kg)飞联的轎(kJ/kg)tf/•A>右屏过二L2对流过舊itQmf551.25d%110073564825220014881305S3330022611978t»44003060266GU3550038793356)434861105)660047194073175570959121AJ1107877005S83479920751U41693Df

6、能93920411102/4108411201122101000R26070489977J1111)0918978273431109712120010122W>0237712219131300110709392125141HK)12021$L1515M12囲1109H755G16160013&521179257217170011925j1259664618180015邓I34U619190016888141817462047012001203202UU0178761504578521670-1222100...,18胖41586Hp«p一■i•■・8252287322(

7、)019H6616694863作业（二）已知某台煤粉锅炉，釆用固态排渣方式。额立蒸发量D=420t/h,再热蒸汽流量350t/h过热蒸汽压力Psh=13.7Mpa,过热蒸汽温度tsh=540°C,给水压力Pfw=15.6MPa,给水温度％=235°C,再热蒸汽进入锅炉时压力/温度2.5MPa/330°C再热蒸汽出锅炉时压力/温度2.3MPa/540°C排污率pbl=3%,汽包压力Pdrum=14.8Mpa,排烟温度0沁=135£,冷空气温度tCa=30°C飞灰和灰渣含碳量均为Cfa=CsI=5%,q3=0.5%o求：锅炉热效率，燃料消耗量