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《240th燃高焦炉混合煤气锅炉设计 毕业设计论文》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要240t/h燃高焦炉混合煤气锅炉设计:(Q低温=1400千卡/标m3),设计的参数为215℃的给水温度,540℃的过热蒸汽温度,140℃的排烟温度,20℃的环境温度。本次设计计算了,炉膛,屏式过热器,高温过热器,低温过热器,高温省煤器,高温空气预热器,低温省煤器,低温空气预热器的结构计算和传热计算。以及对烟道阻力的计算和空气预热器的计算,引风机,送风机的选择。炉膛宽度取7.7米,顶棚宽4.675米,顶棚高4.2米,炉膛总高15.785米。屏式过热器取8片,纵向排数27,每片屏并联管子根数为12,第一根屏管高度4.2米,屏高度最大值4.559米,
2、屏的深度为1.244米。高温过热器横向管排数62,纵向管排数8,管长3.329,管簇深度0.76米。低温过热器横向管排数58,纵向管排数16,管长3.2.高温省煤器横向排数97.5,纵向排数26,受热面布置管长6.2。高温空预器横向管排数100,纵向管排数50,管箱高度1.44米。低温省煤器横向排数97.5,纵向排数64,受热面布置管长3.35米。低温空预器横向管排数100,纵向管排数50,管箱高度1.44米。本次设计中,烟气在炉膛出口温度是1295.1℃,经过屏式过热器烟温下降至1183℃,在经过高温过热器烟温下降到1032.6℃,经低温过热器温
3、度下降到832.54℃,经高温省煤器下降到449℃,经高温空气预热器降至382℃,经低温省煤器下降到222℃,经高温空气预热器降至146.7℃排烟。本次设计中,水的流程是215℃给水经低温省煤器加热到260℃,经高温省煤器加热到319.97℃,进入汽包,再经下降管,由水冷壁使饱和水变成319.97℃的水蒸气,经低温过热器将水蒸气加热到425.2℃,经屏将水蒸气加热到455.87℃,最后经高温过热器加热到540℃引出做功。关键字:炉膛,过热器,省煤器,空气预热器。99Abstract240t/hburningblastfurnacegasboiler
4、design(highmixingcokeovengas:low-temperatureQ=1400kcal/standardm3)ofthegraduationproject,thedesignparametersforthefeedwatertemperatureof215°C,thesuperheatedsteamtemperatureof540°C,140°Cexhaustsmoketemperature,20°Cambienttemperature.Thedesign,furnace,screensuperheater,superheat
5、erhightemperature,lowtemperaturesuperheater,high-temperatureeconomizer,hightemperatureairpreheater,low-temperatureeconomizer,lowtemperatureairpreheaterofstructuralcalculationsandheattransfercalculations.Andcalculationofflueresistanceandairpreheatercalculationofinduceddraftfan,
6、bloweroptions.Takechamberwidth7.7meters,theceilingis4.675meterswide,4.2metershighceilinghearth,total15.785metreshigh.Takeplatensuperheaterof8,longitudinalrownumber27,everypieceofscreenthenumberof12paralleltubes,thefirstrootscreenpipeheight4.2meters,screenthemaximumheight4.559m
7、eters,thedepthofthescreenis1.244meters.Hightemperaturesuperheatertubetransversenumber62,verticaltubenumber8,length3.329,thedepthof0.76meters.Lowtemperaturesuperheatertubefor58horizontal,verticaltubenumber16,length3.2.Hightemperatureeconomizerhorizontalrownumber97.5,longitudina
8、lrownumber26,decorateinheatinglength6.2.Hightemperatureairpre