65吨小时循环流化床锅炉设计学士学位论文

《65吨小时循环流化床锅炉设计学士学位论文》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、哈尔滨理工大学学士学位论文学士学位论文65吨/小时循环流化床锅炉设计摘要本次的毕业设计的题目是65吨/小时循环流化床锅炉设计。设计本着锅炉运行的安全性和可靠性为首要设计特性的准则，综合考虑燃烧，传热，脱硫，烟气、空气、工质的动力特性以及受热面的磨损和腐蚀。保证锅炉的着火稳定性，炉膛内有足够的辐射热量，煤的燃尽程度，合理的烟气速度和排烟温度以及脱硫效率。同时，还要确保有一定的气密性以保证炉膛内进行微负压燃烧。在整个设计过程中作为技术支持进行了热力计算、强度计算和烟风阻力计算。其中热力计算包括炉膛、高温过热器、低温过热器、省煤器以及空气预热器。炉膛及尾

2、部顶棚全部采用膜式壁结构，解决炉膛漏风问题；将全部过热器布置在尾部烟道内，使其运行更加可靠。为了提高分离器的分离效率和锅炉的结构紧凑，采用两个小直径高温旋风分离器。鉴于该锅炉为中压锅炉，所以采用钢管式省煤器，为降低低温腐蚀，便于维修，将空气预热器低温段与高温段隔开。此外，利用CAD绘制锅炉总图、炉墙砖砌图、锅筒展开图、锅炉本体图。关键词　循环流化床锅炉；热力计算；强度计算；烟风阻力计算-III-哈尔滨理工大学学士学位论文TheDesignofCFB65t/hBoilerAbstractThetitleofthepaperisthedesignof6

3、5t/hcirculatingfluidizedbedboiler(CFB).Thesavetyanddependabilityofoperationthatcharacterizethehadtherebeginninginthedesignofthisboilertype.Therefore,amongthewholedesignthefatorsthatthecombustion,theheattransmittion,thedesulphurization,thethemotivecharact-eristicofthesmokespiri

4、tandairandtheworkquality,theattritionandcorrosi-onoftheheatingsuefaceshouldbeconsideratecomprehensivelyandseriouslytoensurethestabilityofcatchfireoftheboiler,andthereisenoughradiantheatinsidethefurnace,ensurethefulecouldbeburnoutcompletely,andthereisaproperflowrateofthegasande

5、xhaustgastemperature,alsotheboilerhasacertainlydesulphurizationefficiency.Intheprocessofthewholedesign,wecarrythroughthethermalcalculation,flue-gasandairresistancecalculation,andstrengthcalculationofpressurepartsforboilerstobeatechnicalsupport.Thethethermalcalculationincludeth

6、efurnace,hightemperaturesuperheater,lowtemperaturesuperheater,steeltubeeconomizerandtubularairheater.Thefurnaceandtheroofusemembranewalltosolveproblemofairleakageandputallofthesuperheaterintheconvectionpasstomakethesuperheaterdependablewhenitworking.Inordertoimprovetheseparate

7、efficiencyofcycloneseparator,andmaketheboilermorewell-organized,weusetwosmalldiametercycloneseparator.Consideritisamediumpressureboiler,wefititwithsteeltubeeconomizer.Inordertoreducethelowtemperaturecorrosionandeasytorepair,separatethehightemperaturepartandthelowtemperaturepar

8、tofairheaterforacertaindistance.Inaddition,weportraythediagra