锅炉课程设计计算

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1、锅炉课程设计一．设计任务书1.额定蒸发量D=35t/h2.蒸汽压力p=2.5M(表压)3.蒸汽温度=350℃4.给水温度=105℃5．冷空气温度=30℃6.空气预热温度=165℃7.排烟温度=185℃8.排污率=5％9.燃料特性：⑴燃料种类：Ⅲ类烟煤；⑵燃料应用基成分：（见下表）燃料应用基成分（表-1）成分煤种CHONSWA合计淮南烟煤57.423.817.160.930.468.8521.3738.48100一：锅炉燃料与燃烧计算㈠锅炉受热面得过量空气系数及漏风系数（表-2）序号锅炉受热面入口过量空气系数漏风

2、系数出口过量空气系数123456炉膛凝渣管蒸汽过热器锅炉管束省煤器空气预热器1.401.501.501.551.651.750.1000.050.100.100.101.501.501.551.651.751.85㈠：理论空气量、理论烟气容积的计算1.理论空气量：=0.0889（+0.375）+0.265-0.0333=0.0889（57.42+0.375×0.46）+0.265×3.81-0.0333×7.16=5.891/㎏2.三原子气体容积：=0.01866×（+0.375）=0.01866×（57.42

3、+0.375×0.46）=1.075/㎏3.理论氮气容积：=0.79+0.8×=0.79×5.891+0.8×=4.661/㎏4.理论水蒸气容积：=0.111+0.0124+0.0161=0.111×3.81+0.0124×8.85+0.0161×5.891=0.627/㎏5.理论烟气量：=++=1.075+4.669+0.627=6.371/㎏㈡：理论空气量理论烟气容积的计算汇总（表-3）序号名称符号单位计算公式结果1理论空气量/㎏0.0889（+0.375）+0.265-0.03335.8912三原子气体容

4、积/㎏0.01866（+0.375）1.0753理论氮气容积/㎏0.79+0.8×4.6614理论水蒸气容积/㎏0.111+0.0124+0.01610.6275理论烟气量/㎏++6.371㈢：各受热面烟道中烟气特性表（表-4)序号名称符号单位计算公式炉膛与凝渣管蒸汽过热器锅炉管束省煤器空气预热器1平均空气过量系数1.501.5251.601.701.802实际水蒸气容积/㎏+0.0161(-1)0.6740.6770.6840.6930.7033烟气总容积/㎏+++(-1)9.3569.5089.95510.

5、55311.1524容积份额/0.11490.11310.10800.10190.09645O容积份额/0.07200.07470.06870.06570.06306三原子气体总容积+0.18690.18780.17670.16760.1536㈣：1N气体空气及1㎏灰焓（表-5）（℃）(KJ/N)(KJ/N)(KJ/N)(KJ/N)(KJ/N)(KJ/㎏)1002003004005006007008009001000110012001300140015001600170018001900200021002200

6、170357559772994122514621705195222042458271729773239350337694036430545744844511553871302603925276648049481094124213921544169718532009216623252484264428042965312732891322674075516998501004116013181478163818011964212822942460262927972967313833093483151304463626

7、7959691149133415261723192521322344255927793002322934583690392641634402132266403542684830978112912821437159517531914207622392403256727312899309932343402811692643604585606627678759841097120613611583175818762064218623862512㈤：烟气温焓表（表-6）℃=+(a-1)kJ/㎏=1.075=4.669=0

8、.627++=5.891a=1.50a=1.55a=1.65a=1.75a=1.851234567891011100200300400182.8383.8600.9830.0605.91211.91827.12456.394.7190.6290.3392.5883.41786.32718.33678.7777.61567.02374.13192.92804.9426.195754.11