中英--豫兴热风炉简报3-21版

豫兴顶燃式热风炉CatenaryDomeShaftlessHotAirStove(CDSS)内燃式热风炉曾经是世界上最常见的一种热风炉的形式。蓄热室和燃烧室平行布局在同一个炉壳内。这种热风炉结构最大的缺陷在于这种燃烧室的布局和结构，会频繁出现需要维修的故障。其六大缺陷是：由于燃烧室和蓄热室之间的温差效应：燃烧室和格子砖蓄热室会串通发生“短路”。这会导致一氧化碳溢出并降低热风温度;燃烧室与蓄热室之间的隔墙弯曲下倾(香蕉效应)，使得燃烧室和蓄热室相互损坏；另外：燃烧室的温度高，会使耐火材料发生蠕变，导致燃烧室砖体、热风管拱门和热风炉燃烧器容易变形和受损；由于燃烧室位于侧边，导致燃烧产物从拱顶沿着格子砖蓄热室向下的分布不均匀，达到15%；在送风和燃烧期间，温度会有波动，将导致隔墙耐火材料出现裂损；脉冲燃烧。这种燃烧与本身高度过高的燃烧室的高频震动有关。长时间运行情况下，最高热风温度可达1200°C。内燃式热风炉InternalcombustionhotairstoveInternalcombustionhotairstovewasoncemostcommonkindofhotairstoveintheworld.Regeneratorchamberandcombustionchamberareparallellayoutinthesamestoveshell.Thebiggestdefectisthecombustionchamber.Thisstructurerequirefrequentrepairstoppages.Therearesixdefects:“Shortcircuit”ordirecttransferofgaseshappensbetweencombustionchamberandcheckerchamber.Thiscausesoutflowofnon-burntgasesintoatmosphereandthereductionofhotblasttemperature;Thecombustionchamberslopetowardschecker(“banana”effect)leadstodamageofbothcombustionschamberandchecker;Deformationanddemolitionofthecombustionchamberbrickwork,archesofhotblastconnectingpipesandstoveburnerresultingfromthecreepofrefractorymaterialsUnevendistributionofwastegasalongthecheckeramountsto15%duetothelateralpositionofcombustionchamber.refractorymaterialscrackingontheconditionsofthermalstabilityunderabruptfluctuationintemperatureduringchangeoverbetweenblastandgasperiods;Pulsatingcombustion.ItconnectedwithHigh-frequencyvibrationsofover-heightcombustionchamber.InternalcombustionhotairstoveMaximalhotblasttemperatureunderlong-termoperationis1200°C.相对于内燃式风炉，外燃式热风炉最重要的改进是把燃烧室外置。Themostconsiderablemodernizationofthehot-airstoveswithinternalcombustionchamberwerethedeviceswithexternalcombustionchamber.这种改进相对于内燃式热风炉也只消除了两个缺陷：“短路”和“香蕉效应”。Thisconstructioneliminatesonlytwoofthedisadvantages:shortcircuit”and“bananaeffect”;热风炉顶部构造相当复杂;Thedomeconstructionbecomesmorecomplex;需要占用更多的空间;Muchmorespaceforlocationisrequired;设备成本增加30%-35%；Thecostofthesedevicesis30-35%higher;长期运行情况，最高热风温度为1250°C。Maximalhotblasttemperatureunderlong-termoperationis1250°C.外燃式热风炉Outercombustionhotairstove豫兴顶燃式热风炉CDSS去除热风炉的燃烧室，使煤气在热风炉顶部的燃烧系统内燃烧，则内外置燃烧室的主要缺陷也将随之消除-----这就是顶燃式热风炉主要特点。Removethecombustionchamber,andmakethegascombustioninthecombustionsystemonthetophotairstove,thusthemaindefectofcombustionchamberwillbeeliminated-thisisthemaincharacteristicoftheshaftlesshotairstove.豫兴顶燃式热风炉（CDSS）是指一种具有悬链型拱顶、带有环形布置燃烧器的顶燃式热风炉。TheCDSSadoptsCatenaryconstructionDomeShaftlesshotStove,whichhasringburnersettheunderpartofthedome.在拱顶的基础部分有一个环形预燃室。环形预燃室的底部安装有几十个小型陶瓷燃烧器喷嘴。环形的煤气和空气收集器位于炉壳内.Thedomebasehasaringprechamber.Thereareseveraltensofsmallsizeceramicburnersinstalledinthebottompartoftheringprechamber.Theringgasandaircollectorsarelocatedinsidetheshell.长期运行情况，最高热风温度为1200~1350°C。Maximalhotblasttemperatureunderlong-termoperationis1200~1350°C.豫兴顶燃式热风炉CDSS豫兴顶燃式热风炉（CDSS）具有投资小、风温高、运行稳定、节能环保、寿命长等特点。CDSShavesmallinvestment,hightemperatureblast,stableoperation,energy-savingandenvironmentalprotection,longlife,etc.features.针对需要改造的内燃式热风炉，CDSS可以不更换炉壳、不改动热风管系，直接将内燃式热风炉改造成顶燃式热风炉。Asforinternal-combustionhotairstoveneedmodification,CDSStechnologydon’treplacethestoveshell,andnochangestothehotairpipingsystem,directlytransforminternal-combustionhotairstoveintoshaftlesshotairstove.长期运行情况，最高热风温度为1200~1350°C。Maximalhotblasttemperatureunderlong-termoperationis1200~1350°C.豫兴热风炉优势：CDSSadvantages:1，煤气、空气垂直向上交错喷射，混合充分、燃烧完全；Gas,airverticalspoutup,mixedcompletelybyinterveinspout,andgettingcombustioncomplete;2，燃烧产物均匀分布到蓄热体，明显提高蓄热体的利用率；Theregeneratorisheatedequally,andenhanceregeneratorusingrate;3，燃烧过程更加稳定，消除了燃烧震荡，使热风炉安运行全、稳定；Thecombustionprocessismorestable,andavoidthecombustionvibration,andmakehotstovesafety,stability,highloadoperation;火焰区4，消除了燃烧过程产生回火的弊端，提高了热风炉操作运行的安全性；Avoidefficientlythepossibilityofbackfireduringthecombustionprocess,enhancetheoperationsecurityofhotstove.5，有效地节省了热风炉的初投资；Saveefficientlyoriginalinvestofthehotstoves.6，采用悬链线拱形结构的拱顶，提高了拱顶温度，延长了热风炉的使用寿命；Thedomeadoptscatenaryconstructiontoincreasetheoperationallifespanofhotstoves.热风炉燃烧室流场的流函数的等值线显示图Theflowfieldflowfunctionisolinevisualchartofhotblaststovecombustionchamber豫兴热风炉优势CDSSadvantages:豫兴热风炉优势CDSSadvantages:气流垂直上喷燃烧室流场流函数等值线分布图Theflowfieldflowfunctionisolinevisualchartofthecombustionchamberflowfieldwithairflowverticalspoutsup内燃式改为豫兴顶燃式热风炉的第一方案结构图Thefirstsolutionofreformingtheinternalcombustionhotairstove左：内燃式热风炉原来的结构；右：热风炉改造结构的第一方案；Left:beforereformation；Right:afterreformation；热风炉改造结构的第二种方案Thesecondsolutionofreformingtheinternalcombustionhotairstove保留火井做热风出口通道remainfirewelltobehotairoutletpassage热风出口不作变动Nochangetohotairoutlet拆除矩形陶瓷燃烧器Removerectangleceramicburner豫兴型热风炉实验装置照片ThephotoofCDSSexperimentdevice目前在中国，已经建成和建设中的豫兴热风炉有141座，最大热风炉为四川德钢公司为1350立方米高炉配套的豫兴热风炉。Thereare141CDSSincludingoperationandunderbuildinginchinanow.ThebiggestoneislocatedintheSiChuanDesteelfor1350m3BF.谢谢！Thankyou