燃气锅炉毕业设计论文

内蒙古科技大学毕业设计说明书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，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。内蒙古科技大学毕业设计说明书2Abstract240t/hburningblastfurnacegasboilerdesign(highmixingcokeovengas:low-temperatureQ=1400kcal/standardm3)ofthegraduationproject,thedesignparametersforthefeedwatertemperatureof215°C,thesuperheatedsteamtemperatureof540°C,140°Cexhaustsmoketemperature,20°Cambienttemperature.Thedesign,furnace,screensuperheater,superheaterhightemperature,lowtemperaturesuperheater,high-temperatureeconomizer,hightemperatureairpreheater,low-temperatureeconomizer,lowtemperatureairpreheaterofstructuralcalculationsandheattransfercalculations.Andcalculationofflueresistanceandairpreheatercalculationofinduceddraftfan,bloweroptions.Takechamberwidth7.7meters,theceilingis4.675meterswide,4.2metershighceilinghearth,total15.785metreshigh.Takeplatensuperheaterof8,longitudinalrownumber27,everypieceofscreenthenumberof12paralleltubes,thefirstrootscreenpipeheight4.2meters,screenthemaximumheight4.559meters,thedepthofthescreenis1.244meters.Hightemperaturesuperheatertubetransversenumber62,verticaltubenumber8,length3.329,thedepthof0.76meters.Lowtemperaturesuperheatertubefor58horizontal,verticaltubenumber16,length3.2.Hightemperatureeconomizerhorizontalrownumber97.5,longitudinalrownumber26,decorateinheatinglength6.2.Hightemperatureairpreheaterhorizontaltubenumber100,verticaltubenumber50,theboxheight1.44meters.Oflowtemperatureeconomizerhorizontalrownumber97.5,longitudinalrownumber64,decorateinheatingtube3.35meters.Lowtemperatureairpreheaterhorizontaltubenumber100,verticaltubenumber50,theboxheight1.44meters.Inthisdesign,thefluegasoutlettemperatureinthefurnaceis1295.1°C,aftertheplatensuperheaterfluegastemperaturedroppedto1183°Cafterthehightemperaturesuperheaterfluegastemperaturedownto1032.6°C,lowtemperatureair内蒙古科技大学毕业设计说明书3preheatertemperaturedroppedto832.54°Cdecreasedto449°C,hightemperatureeconomizer,airpreheaterathightemperaturedroppedto382°C,lowtemperatureeconomizerdecreasedto222°C,droppedto146.7℃hightemperatureairpreheaterexhaust.Inthisdesign,thewaterflowis215℃watersupplybythelow-temperatureeconomizerheatingto260°C,hightemperatureeconomizerheatingto319.97°C,intothedrum,andthenthedownpipe,thewaterwallsothatthesaturatedwaterinto319.97°Csteam,lowtemperaturesuperheatersteamheatedto425.2°C,thescreenwillsteamheatedto455.87°C,andfinallybythehightemperaturesuperheaterheatingto540°Cleadstoacting.Keywords:furnace,superheater,economizer,airpreheater.内蒙古科技大学毕业设计说明书4目录摘要...............................................................................................................................1Abstract..........................................................................................................................2绪论...............................................................................................................................61燃气锅炉的特点.........................................................................................................62燃气锅炉的现状.........................................................................................................83此次设计燃气锅炉的基本思路.................................................................................9第一章·设计任务与燃料特性参数.......................................................................101.1设计任务...............................................................................................................101.2燃料特性...............................................................................................................10第二章·锅炉整体布置的确定.................................................................................112.1燃料燃烧计算.....................................................................................................112.2空气平衡及焓温表................................................................................................132.3锅炉热平衡及燃料消耗量计算...........................................................................152.4燃烧室设计及传热计算.......................................................................................162.5炉膛结构尺寸计算...............................................................................................182.6燃烧器的布置及主要尺寸.................................................................................202.6燃烧室结构特性计算.........................................................