焦炉荒煤气废热锅炉传热计算及结构设计和实现 能量学专业VIP免费

摘要荒煤气是煤在高温干馏时产生的混合气，成分复杂，其自身经处理后可以得到多种化工产品。此外，荒煤气中还蕴含着大量显热，在能源情况不容乐观的当下，对荒煤气显热回收利用的研究对于我国的节能减排措施具有重要意义。而采用废热锅炉回收热量是一种较为成熟的方法。管壳式换热器具有结构简单，使用经验丰富，可靠性强等优点，在目前的应用中最为广泛，同时可作为废热锅炉使用。由于荒煤气组分复杂，本文首先利用AspenPlus软件对其中的煤焦油组分采用虚拟组分法进行分析。文中采用管壳式换热器来对荒煤气显热进行回收。先通过经典计算来得出传热系数，再与AspenPlus得出的传热系数进行对比，得出二者误差在合理范围内。在后续换热器设计中，继续使用AspenPlus软件对换热器进行工艺设计，结合初步设计结果再对设计参数进行校正。以工艺设计参数为基础，对换热器进行了机械结构设计，主要进行了材料的选择以及相关强度的校核工作。在完成机械设计后利用AutoCAD软件绘制出换热器装配图。本文在设计计算及图纸绘制过程中参考了相关设计手册及国家标准。关键词：荒煤气；传热计算；结构设计HeatTransferCalculationandMechanicalDesignforWasteHeatBoilerofCokeOvenGasAbstractCokeovengasisagasmixturewhichisproducedintheprocessofhightemperaturedrydistillationofthecoal.Withitscomplexcomposition,wecangetavarietyofchemicalproductsfromitaftersomeappropriateprocesses.Inaddition,cokeovengasalsocontainsalargeamountofsensibleheat.Asthepresentsituationoftheresourceisnotaffirmative,theresearchontheheatrecoveryofcokeovengasisofgreatsignificanceinourcountry’sEnergysavingandemissionreductionmeasures.Theuseofwasteheatboilerforheatrecoveryisamaturemethod.Shellandtubeheatexchangerhasanumberofadvantagessuchasasimplestructure,richexperience,strongreliabilityandsoon,whichmakesitscurrentapplicationmostextensive.Besides,italsocanbeusedasawasteheatboiler.Duetothecomplexityofthegas’scomponent,firstlythisarticleuseAspenPlustoanalyzethecoaltarinitbypseudo-componentmethod.Inthisarticle,shellandtubeheatexchangerisusedtorecoversensibleheat.Theheattransfercoefficientisobtainedbytheclassicalcalculation,andthencomparedwiththeheattransfercoefficientobtainedbyAspenPlus,theerroriswithinreasonablerange.Inthesubsequentheatexchangerdesign,wecontinueusingAspenPlusontheheatexchangerprocessdesign.Combinedwiththepreliminarydesignresult,thedesignparametersarethenadjusted.Onthebasisoftheparametersprovidedbyprocessdesign,themechanicaldesignoftheheatexchangerisdone.Mainlyfortheselectionofmaterialsandstrengthcheckwork.AndtheassemblydiagramoftheexchangerisdrawnatthesametimeviaAutoCAD.Duringthedesigncalculationanddrawingprocess,somerelevantdesignmanualsandnationalstandardsarereferenced.KeyWords：CokeOvenGas;HeatTransferCalculation;MechanicalDesign目录摘要.............................................................................................................................IAbstract..............................................................................................................................II1文献综述.......................................................................................................................11.1荒煤气简介........................................................................................................11.1.1荒煤气来源与组成.................................................................................11.1.2荒煤气基本特点.....................................................................................11.1.3荒煤气应用价值...................................