您好,欢迎访问三七文档
当前位置:首页 > 商业/管理/HR > 咨询培训 > 锅炉原理课后习题答案
1锅炉计算题P59页习题3:%07.329376.02.346.81003.141002.341001001212ararararMMCC%19.39376.04.31001001212ararararMMHH%47.09376.05.01001001212ararararMMSS%34.59376.07.51001001212ararararMMOO%75.09376.08.01001001212ararararMMNN%88.439376.08.461001001212ararararMMAAkgkJMMMMQQarararararnetarnet/131123.14259376.0)6.82514151(25100100)25(21211.2,习题4:tMMBarar52.95100)100(10021kgkJMMMMQQarararararnet/2115725100100)25(21211.课上题1:某种煤收到基含碳量为40%。由于受外界条件的影响,其收到基水分由15%减少到10%,收到基灰分由25%增加到35%,试求其水分和灰分变化后的收到基含碳量。解:222111)(100100)(100100ararararararCAMCAM%67.364025151003510100)(100)(100111222)()(ararararararCAMAMC课上题2:已知甲种煤的Qnet,ar=29166kJ/kg,Aar=18%;乙种煤的Qnet,ar=18788kJ/kg,Aar=15%。如果锅炉效率、负荷等条件相同,试问用哪一种燃料锅炉出灰量大?2解:%34.318788158.41868.4186%58.229166188.41868.4186,,,,arnetararzsarnetararzsQAAQA:A乙:甲arzsarzsAA,,乙甲,即乙燃料锅炉出灰量大课上题3:已知锅炉每小时燃煤20t/h,燃料成分如下:Car=49.625%Har=5.0%Oar=10%Nar=1.375%Sar=1.0%Aar=20%Mar=13%,锅炉在完全燃烧情况下,如果测得炉子出口处RO2L=15%,而排烟处RO2py=12.5%,试求每小时漏入烟道的空气量。1758.01375.0625.4910126.0535.2375.0126.035.2ararararSCOH86.171758.0121121ROmax219.11586.172max2LLRORO43.15.1286.172max2pypyRORO24.019.143.1LpykgNmOHSCVarararark/5.440333.0265.0)375.0(0889.030△Vk0=B△αVk0=20*103*0.24*5.44=2.611*104m3/h,课上题4。已知理论空气量Vk0=5m3/kg,每小时耗煤量40t/h。当完全燃烧时,测得省煤器前烟气中含氧量O2′=6.0%,省煤器后烟气中含氧量O2″=6.6%。求:实际漏入省煤器的空气量。解:省煤器前:4.16212121212O省煤器出口处:46.16.6212121212O漏风系数:△α=1.46-1.4=0.06△Vk0=B△αVk0=40*103*0.06*5=1.2*104m3/h,3习题8:%29.81%100215121791106.39.23%1003Q6,pjarnetBQ习题9:kg/kJ2699.71007.19575.48.2787100rwiiq10)(10)(33gspspsgsqgliiDiiDQh/kJ105.00110)33.23108.830(2006.010)33.2317.2699(20733hkgQQBarnetglgl/6.1284418609310010001.57.atBG/8.33759243653习题3:某燃煤锅炉,蒸发量为10t/h,将其改造为燃油炉,改造后最高工作压力为1.0MPa,燃用重油低位发热量为42050kJ/kg,取给水温度为105℃,蒸汽湿度为2.3%,热效率为91%,燃油锅炉体积热强度qV为380kW/m3,试确定在蒸发量不变的条件下所需炉膛体积。查得:①锅炉给水焓为440.9kJ/kg;②1.0MPa时,水蒸汽的特性如下:i〃(kJ/kg)r(kJ/kg)2776.22013.6VBQqarnetV3600,可知VarnetqBQV3600,arnetgsqarnetglglQBiiDBQQ,3,10)(可知glgsqarnetiiDBQ3,10)(因此glVgsqqiiDV360010)(3kg/kJ9.27291006.20133.22.2776100rwiiq33339.1891.0380360010)9.4409.2729(10360010)(mqiiDVglVgsq
本文标题:锅炉原理课后习题答案
链接地址:https://www.777doc.com/doc-1992306 .html