The utility model discloses a reverse baffle reburning chain arch, which relates to the field of coal-fired boilers. Background: At present, all chain-row boilers have no secondary combustion function and have high smoke exhaust efficiency and low pollution. Objective: To change the arch structure to burn off black smoke and improve the burning rate and efficiency. Scheme: A supplementary air nozzle (2) is added, and a suspension barrier (10) is arranged in the middle part of the front arch to divide the front arch into two chambers, one is the ignition chamber (smoke section) and the other is the combustion chamber (11) (smoke-free section). The front part of the suspension barrier is provided with a flat partition board (7) to make the ignition chamber into two layers, the lower layer is the ignition chamber (8) and the upper layer is the folding channel (6). A passage opening (5) is formed between the baffle and the front wall to connect the folding passage to the combustion chamber and the ignition chamber. The ignition chamber smoke is very large. The combustion chamber temperature is above 1000 degrees. Under the action of suspension and isolation, the ignition speed is accelerated by the opposite flow of the pyrotechnic gas in the ignition chamber and the chain. The smoke burns out in the flow of the combustion chamber when the pyrotechnics are re-entrained by the secondary air supply nozzle in the upper passage and re-entrained by the secondary air supply nozzle. Advantages: Smokeless ignition, fast ignition and high efficiency are suitable for pollution reduction transformation.
【技术实现步骤摘要】
逆折流重燃链排拱
:本技术涉及燃煤锅炉,特别涉及燃煤锅炉的拱。
技术介绍
:现有技术中,燃煤锅炉的灶90%以上还沿用古老的燃烧方式。即“炉排堆燃料,燃烧高温直接做功”。该方式为一次性燃灶,一次燃灶存在下述缺点:1.燃烧过程局部缺氧,缺氧部分的挥发物不能进行氧化。2.扰动条件差,存在局部配气过浓或过稀现象。过浓,过稀挥发物都不能进行氧化。3.部分挥发物没达到可氧化的高温条件。为提高燃烧效率,在大型锅炉内设有拱。“拱”主要作用是:促使气流的混合,合理组织炉内的热辐射和热烟气的流动,目的达到保温促燃作用。尽管目前的“拱”具有保温促燃作用,但对一次燃灶的缺点基本没有得到解决。
技术实现思路
:1.要解决的技术问题:改变拱的结构,创建补气、扰动、高温重燃条件。2.本新型解决其技术问题所采用的方案:方案概况:参照图1,前炉壁(1)增设了二次补气嘴(2)。前拱靠前炉壁设置,前拱很长中段设有吊挡隔(10)把拱内分成前后两室。前为着火室(8)(有烟段),后为燃烧室(11)(无烟段)。靠吊挡隔的前部设有隔板(7),使着火室又分上下两层,上是折流通道(6),下为着火室(8)。隔扳距前壁留有通道口(5),使着火室、折流通、燃烧室连通。靠后炉壁还设有后拱(33),前与后拱的空间称喉口(34)。重燃原理:在运行中着火室烟很大。燃烧室的室温在千度以上。受吊挡隔(10)的作用,着火室的火与链排相反流动促使着火速加快,带烟的火又经折流通道折反进燃烧室,在折反中由二次补气嘴(2)补了气,补气的烟在有千度燃烧室进行了二次燃烧后经喉口(34)流出。后拱火流过剩空气很多带有大量的氧,前后拱两股高温流相 ...
【技术保护点】
1.逆折流重燃链排拱,链排上部紧挨前炉壁设有前拱,紧挨后炉壁设有后拱,其特征在于:前炉壁(1)增设了二次补气室(3),室内设有一行二次补气嘴(2);在链排(4)上面设有拱墙(16),拱墙上设拱顶(9);前拱内中段设有吊挡隔(10),吊挡隔把前拱内分成前后两室,前为着火室(8),后为燃烧室(11);在吊挡隔的前部设有隔板(7),隔板上层是折流通道(6),下层是着火室(8),隔板的前端与前炉壁内面之间形成通道口(5);前拱左壁外设有连通下锅筒的管,该管上端连接吊挡轴(27)的端口(26);前拱左壁外前方还设有连通上锅筒的管,该管下端连接隔板(7)的管接嘴(23)。
【技术特征摘要】
1.逆折流重燃链排拱,链排上部紧挨前炉壁设有前拱,紧挨后炉壁设有后拱,其特征在于:前炉壁(1)增设了二次补气室(3),室内设有一行二次补气嘴(2);在链排(4)上面设有拱墙(16),拱墙上设拱顶(9);前拱内中段设有吊挡隔(10),吊挡隔把前拱内分成前后两室,前为着火室(8),后为燃烧室(11);在吊挡隔的前部设有隔板(7),隔板上层是折流通道(6),下层是着火室(8),隔板的前端与前炉壁内面之间形成通道口(5);前拱左壁外设有连通下锅筒的管,该管上端连接吊挡轴(27)的端口(26);前拱左壁外前方还设有连通上锅筒的管,该管下端连接隔板(7)的管接嘴(23)。2.根据权利要求1...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。