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窑头窑尾减少漏风漏料的措施

2024-10-16

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作者:王占光

(智慧水泥) 

窑头冷风进入窑内,不但破坏了入窑的气体流场,且和二次风混合后,降低了二次风温,在不利于燃烧的同时,也增加了煤耗。

窑尾漏风危害更大,不但降低了尾温,增加了煤耗,还极易造成结皮,影响通风,还影响着产量、质量的发挥,即由于漏风增大了高温风机的负荷,同样条件下高温风机拉废气的量减少,会严重影响系统能力的发挥。所以危害很大,必须予以重视。

同样窑头、窑尾的漏料危害也不小.首先污染环境,其次危害密封件的寿命。

下面根据笔者的经验谈谈降低窑头、窑尾漏风、漏料的方法与措施,望能起到借鉴作用。

对于窑头尾的密封形式,现在以接触式为主。一是径向接触式密封,由装在窑上的摩擦圈、弹性薄板(鱼鳞片)及涨紧装置组成。轴向式密封主要有固定和活动摩擦环及气缸或弹簧装置组成。

一、径向式密封的减漏措施

1.保证摩擦圈与窑的连接可靠,保证运转稳定。在安装摩擦圈时,无论窑的径向跳动如何,要以摩擦圈的径向跳动为准来找正,控制其径向跳动小于12毫米。

2.摩擦圈与鱼鳞板接触的范围内不得有焊瘤、凸台、凹坑凹槽,焊缝需打磨平整,防止运行中挂坏鱼鳞片和鱼鳞的抖动造成漏风漏料。

3.摩擦圈与窑头护铁要扣和严实,防止冷却风进入,也防止热风外串对窑筒体及摩擦圈造成伤害。

4.摩擦圈与鱼鳞片之间可适当润滑,减少磨损。

5.要保证窑的正常串动,避免将摩擦圈磨成凹槽,一旦形成台阶,在窑串动时就会折坏鱼鳞片。

6.必须保证摩擦圈与筒体的冷风冷却,防止摩擦圈变形引起不必要的漏风漏料。

7.鱼鳞片涨紧适当。以能把鱼鳞片与摩擦圈紧密贴合为准,不要过紧。不然磨损较快。

8.在窑头尾安装鱼鳞片的喇叭口处要设置排灰装置,保证在摩擦圈与鱼鳞片之间有集灰时能够及时排出,以避免集料对密封的破坏,避免局部密封不良引起漏风漏料。同时也要在排灰管上装锁风阀,避免冷风从此处进入。

9.当发现鱼鳞片有发生歪斜及其它方面变形时,要及时修整或更换。

10.当发现摩擦圈有磨穿迹象或磨损较多时,应计划更换,否则会挂怀密封。

11.一旦发现摩擦圈运行不稳定,必须查明原因进行处理,可能是窑与摩擦圈的连接失效所致。

12.及时排出密封处的集灰,防止蹩坏鱼鳞片。

二、轴向摩擦密封的防漏措施

1.固定摩擦圈要固定牢靠,不得有松动现象,避免晃荡漏风漏料。

2.保证活动摩擦圈轴向活动灵活,可做必要的润滑,防止卡滞造成密封不严,漏料漏风。

3.保证气缸活动自如,能够及时施压,保证摩擦环紧密贴合。

4.发现摩擦圈上的摩擦片损坏或磨薄后,要及时处理。

5.保证摩擦圈之间的润滑,不得发生干磨,否则会磨损较快。

6.发现集灰及时清理,避免损坏摩擦片,等等。

结束语

窑头尾的漏风漏料危害较大,除了对密封装置本身严格要求外,系统管理也需要跟的上。比如窑尾部结圈后,物料的堆积会造成漏料,危害密封装置;窑尾斜坡下料不顺造成物料大囤积,也会造成密封处漏料,且影响密封装置的运行;窑头也要防止蓖冷机热端集料,若集料过高,会漏入密封处造成密封损坏等。

另外,各单位对于密封部件的命名也不尽相同,比照理解就好;再者,由于本人水平有限,错误或不适之处难免,敬请批评指正。

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