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1、日产12000吨熟料水泥厂烧成系统工艺设计(窑尾)摘要本次的设计是设计日产12000吨水泥烧成系统窑尾工艺设计。烧成窑尾核心内容式预热器分解炉。从分解炉内的气流运动来看,可归纳为四种基本型式,即:涡旋式、喷腾式、悬浮式和流化床式。早期开发的分解炉,多以上述四种运动型式之一为基础,使生料和燃料分别依靠“涡旋效应”、“喷腾效应”、“悬浮效应”和“流态化效应”分散于热气流中,利用物料颗料之间在炉内流场中的相对运动,实现高度分散、均匀混合和分布、迅速换热,以达到提高燃烧效率,传热效率和入窑生料碳酸盐分解率的目的。伯力鸠斯设计的MSC分解炉增加了脱氮燃烧器和顶部三次风管通过
2、燃料、空气及生料的多级燃烧以达到降低废气中NOx气体含量的目的。影响NOx浓度的主要因素:主燃烧区温度、主燃烧区氧气浓度、主燃烧区氮气的浓度、气体在主燃烧区的停留时间、燃料中氮元素的含量等窑尾预热预分解系统采用单在线分解炉、双系列预热器的方案不仅极大地方便了系统参数的调节和控制,使系统操作易于平衡和优化,而且可使该系统投资额降低15%以上。系统分解炉采用专有技术,分解回转窑中产生的NOx气体,实现了低NOx的排放。该系统配置的分解炉设有低NOx分解段,实现系统的低NOx关键字预热器分解炉旋风筒窑尾29日产12000吨熟料水泥厂烧成系统工艺设计(窑尾)Abstrac
3、tThethisdesignisthedesignnissan12000tonsofcementfiringsystempreheaterprocessdesign.Firingendofthecorecontenttypepreheaterdecompositionfurnace.Decompositionfurnacefromtheairflowmovementtosee,canbedividedintofourbasictypes,namely:thevortextype,spraythosewhotype,suspensiontypeandfluidize
4、dbedtype.Theearlydevelopmentofdecomposingfurnace,inthefourmovementtypeasthefoundation,makeoneofrawmaterialandfuelrespectivelydependon"scrolleffect",and"sprayeffect",and"whosuspendedeffect"and"fluidizedeffect"scatteredinheatflow,theuseofmaterialbetweenthemakingsoftheflowfieldintheovenr
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6、stagerawordertoreducewastegasburninginthepurposeofgasconcentrationNOx.ThemainfactorsofinfluenceNOxconcentration:theLord,theLordburningzonetemperaturecombustionzoneoxygenconcentrations,theLordofthewholeareanitrogengasconcentration,intheLordtheretentiontime,fuelburninginthecontentofnitr
7、ogenelementsuchaspreheatedpreheaterprecalciningsystembyasingleonlinedecompositionfurnace,doubleseriespreheaterschemenotonlygreatlyshowwheresystemparametersoftheadjustmentandthecontrol,andmakesthesystemiseasytooperateandtheoptimization,andbalancecanmakethesystemmorethan15%lowerinvestme
8、nt.Sy