The invention relates to a hot air supply system and a temperature regulating method of the second section of the preheating of the grate, including the upper cover of the second section of the preheating of the grate connected with the kiln tail cover of the rotary kiln, which is characterized in that: the upper part of the upper cover of the second section of the preheating of the grate and the hot air pipes and heating devices on both sides are also arranged, the top of the kiln tail cover of the rotary kiln is provided with a release pipe and a valve, and the upper cover end of the second section of the preheating of the grate is arranged A partition wall is arranged at the connection with the kiln tail cover of the rotary kiln; the heat supplement device is composed of a combustion chamber, a gas burner, a gas supply pipeline, a combustion supporting air supply pipeline, a gas control valve and an air control valve, and a plurality of combustion chambers connected with the upper cover of the preheating section II are symmetrically arranged at the two outer sides of the upper cover of the preheating section II of the grate. The temperature regulation method is: hot air supply, heat supplement and the temperature field regulation in the upper cover of the second preheating section of the grate. The advantages are that the air flow into the preheating secondary layer of the grate is evenly distributed and the preheating effect is good; the air flow temperature gradient is adjustable to make the hot air temperature reach the expected value.
【技术实现步骤摘要】
链箅机预热二段热风供给系统及温度调节方法
本专利技术属于钢铁冶金工业球团矿生产
,具体涉及一种链箅机预热二段热风供给系统及温度调节方法。
技术介绍
目前,链箅机-回转窑-环冷机工艺是铁矿球团生产的主要生产工艺之一,常用的热风流程是将链箅机分为三室(三组)四段,根据热气流温度和穿过料层的方式将链箅机上罩分为鼓风干燥段上罩、抽风干燥段上罩、预热一段上罩、预热二段上罩共四段;根据热气流走向将与链箅机上罩四段对应的链箅机风箱分为三组:第一组风箱对应鼓风干燥段,接受来自环冷机三冷段上罩的冷却废气,用作鼓风干燥的介质;第二组风箱对应抽风干燥段和预热一段,抽风干燥段和预热一段的烟气汇集后,全部由外排系统处理后排入大气;第三组风箱对应预热二段,预热二段的热烟气汇集后,由回热风系统处理后返回抽风干燥段上罩,用作抽风干燥的介质。鼓风干燥段是在链箅机上对球团进行处理的第一道工序,用于鼓风干燥的热源是来自环冷机三冷段上罩的冷却废气,自下而上的热气流通过球团(湿球,以下称“生球”)料层,初步脱除生球水分。抽风干燥段是在链箅机上对球团进行处理的第二道工序,用于抽风干燥的热源是来自链箅机回热风机的热烟气(以下简称“回热风”),自上而下的热气流通过球团(生球)料层,继续脱除生球水分,作为抽风干燥热源的气流温度是根据球团试验确定的。预热一段是链箅机上的过渡环节,预热一段热源是来自环冷机二冷段上罩的热废气(以下简称“二冷段废气”),自上而下的热气流通过球团料层,将生球剩余水分全部脱除,并将球团(干球)加热使其根据需要升温。 ...
【技术保护点】
1.一种链箅机预热二段热风供给系统,包括与回转窑窑尾罩连通的链箅机预热二段上罩,其特征在于:还包括设置在链箅机预热二段上罩上部的热风管路和设置在链箅机预热二段上罩两侧的补热装置,所述的回转窑窑尾罩顶部设置放散管,在放散管顶部设阀门,在所述的链箅机预热二段上罩端部与所述的回转窑窑尾罩连接处设置隔墙;/n所述的补热装置由燃烧室、燃气烧嘴、燃气供给管路、助燃空气供给管路以及设置在燃气供给管路和助燃空气供给管路上的燃气控制阀和空气控制阀组成,在所述的链箅机预热二段上罩两外侧对称设置与预热二段上罩连通的多个燃烧室,所述的燃气烧嘴的出气端插入燃烧室端部,燃气烧嘴的进气端分别与燃气供给管路和助燃空气供给管路相连接,所述的燃气控制阀和空气控制阀为调节阀;/n所述的热风管路由与回转窑窑尾罩连通的回热风总管及多个回热风支管所组成,多个回热风支管一端与回热风总管连通,另一端分别与所述的多个燃烧室连通。/n
【技术特征摘要】
1.一种链箅机预热二段热风供给系统,包括与回转窑窑尾罩连通的链箅机预热二段上罩,其特征在于:还包括设置在链箅机预热二段上罩上部的热风管路和设置在链箅机预热二段上罩两侧的补热装置,所述的回转窑窑尾罩顶部设置放散管,在放散管顶部设阀门,在所述的链箅机预热二段上罩端部与所述的回转窑窑尾罩连接处设置隔墙;
所述的补热装置由燃烧室、燃气烧嘴、燃气供给管路、助燃空气供给管路以及设置在燃气供给管路和助燃空气供给管路上的燃气控制阀和空气控制阀组成,在所述的链箅机预热二段上罩两外侧对称设置与预热二段上罩连通的多个燃烧室,所述的燃气烧嘴的出气端插入燃烧室端部,燃气烧嘴的进气端分别与燃气供给管路和助燃空气供给管路相连接,所述的燃气控制阀和空气控制阀为调节阀;
所述的热风管路由与回转窑窑尾罩连通的回热风总管及多个回热风支管所组成,多个回热风支管一端与回热风总管连通,另一端分别与所述的多个燃烧室连通。
2.根据权利要求1所述的一种链箅机预热二段热风供给系统,其特征在于:所述的回热风总管为...
【专利技术属性】
技术研发人员:郑绥旭,邢守正,吴增福,栾颖,张绍林,吴天月,郑丹阳,
申请(专利权)人:中冶北方大连工程技术有限公司,
类型:发明
国别省市:辽宁;21
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