CO低氮燃烧的炉膛结构设计
摘要
在锅炉的燃烧过程里，空气是不可或缺的，而氮气在空气中约占了78%，在高温条件下，氮气又会和氧气发生反应，产生氮氧化物，造成环境污染。通过CO低氮燃烧的炉膛结构设计能有效地组织燃烧、控制污染物的产生。研究主要是通过控制燃烧过程、燃烧环境和燃烧条件，降低燃烧烟气温度，来抑制NOx的生成，主要研究工作从锅炉炉膛的结构设计入手。设计是否合理，通过炉膛中炉拱、二次风配置、炉墙的结构形式等各方面影响垃圾燃烧的因素综合决定。阐述了炉膛结构设计中应注意的问题，包括炉膛结构、炉膛相关参数的选取、耐火材料的选择及高温腐蚀、渗滤液回喷；分析了CO燃烧过程与炉膛布置之间的关系；并提出进行二次风布置的改进。通过对二次风的布置进行调整，锅炉运行状况改善效果明显。
关键词：炉膛结构设计；CO；数值模拟；低氮燃烧
DESIGNOFFURNACECHAMBERSTRUCTUREFORLOWNITROGENCOMBUSTIONOFCARBONMONXIDE
ABSTRACT
Inthecombustionprocessofboilers,airisindispensable,andintheair,nitrogenaccountsforabout78%,whichinturnreactswithoxygenunderhightemperatureconditionstoproducenitrogenoxidesandcauseenvironmentalpollution.ThedesignoffurnacechamberstructurebyCOlownitrogencombustioncaneffectivelyorganizethecombustionandcontroltheproductionofpollutants.TheresearchmainlyfocusesonsuppressingNOxgenerationbycontrollingthecombustionprocess,combustionenvironmentandcombustionconditions,andreducingthecombustionfluegastemperature,andthemainresearchworkstartsfromthestructuraldesignoftheboilerchamber.Whetherthedesignisreasonableornotisdeterminedbyacombinationoffactorsaffectingwastecombustioninallaspectssuchasfurnacearch,secondaryairconfiguration,andstructuralformoffurnacewallinthefurnacechamber.Theproblemsthatshouldbepaidattentiontointhestructuraldesignofthefurnacechamberaredescribed,includingthestructureofthefurnacechamber,theselectionofrelevantparametersofthefurnacechamber,theselectionofrefractorymaterialsandhightemperaturecorrosion,leachatebackspraying;therelationshipbetweentheCOcombustionprocessandthearrangementofthefurnacechamberisanalyzed;andtheimprovementofthesecondaryairarrangementisproposedtobecarriedout.Throughtheadjustmentofthesecondaryairarrangement,theboileroperatingconditionwasimprovedsignificantly.
Keywords:Designof