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  • 你了解的除尘设备有哪些种类?
  • 本站编辑:杭州方鼎机电设备有限公司发布日期:2018-05-31 14:45 浏览次数:

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袋式除尘器的形式、种类很多,按清灰方式可以分为机械清灰、逆气流清灰、脉冲喷吹清灰三类; 按过滤方式可以分为内过滤式和外过滤式两类;按进出口的位置不同可分为下进风和上进风两类。
The form and variety of bag filter can be divided into three types: mechanical cleaning, reverse airflow cleaning and pulse blowing, and two types of internal filtration and external filtration, which can be divided into two types according to the position of import and export.
1、脉冲喷吹清灰方式
1. The way of pulsing and blowing ash
压缩空气经过喷吹口以很高的速度喷出后诱导围绕的空气在极短的时间内喷入滤袋,使滤袋产生快速胀缩。
Compressed air is ejected at high speed through the nozzle, and the surrounding air is sprayed into the filter bag in a very short time, resulting in rapid expansion and shrinkage of the filter bag.
粉尘层的剥离一方面是借助喷吹气流对粉尘层的剥离力,另一方面则是依靠膨胀滤袋在回缩过程中形成的反向加速度将粉尘甩脱。这种方式的清灰强度大,可以在过滤工作状态下进行清灰,允许的过滤风速也高。
The stripping of dust layer on one hand is the stripping force of the dust layer by the jet airflow, on the other hand, the dust is removed by the reverse acceleration formed during the retracting process of the expansion filter bag. In this way, the ash removal intensity is large, and the dust removal can be carried out under the filtration working condition, and the permitted filtering speed is also high.
由于脉冲喷吹清灰方式具有很多优点,逐渐成为袋式除尘器的一种主要的清灰方式。
Because of the many advantages of pulse jet cleaning, it has gradually become a main way of dust removal in bag filter.
脉冲喷吹清灰袋式除尘器
Pulse blowing dust cleaning bag filter
2、袋式除尘器
2. Bag type dust collector
逆气流清灰是采用室外或循环空气形式与含尘气流相反的反方向气流通过滤袋,使其上的尘层脱落,掉入灰斗中。
The reverse airflow ash cleaning is carried out in the form of outdoor or circulating air, which is opposite to the dust laden air flow through the filter bag, so that the dust layer falls off and falls into the ash hopper.
在这种清灰方式中,一方面是由于反方向的清灰气流在粉尘层上形成的黏性剥离力直接剥离尘层;另一方面,由于气流方向的改变,滤袋产生胀缩振动,也有助于尘块的脱落。
On the one hand, the dust layer formed by the reverse direction of the dust flow on the dust layer is directly stripped from the dust layer. On the other hand, the expansion and contraction vibration of the filter bag is produced because of the change of the direction of the air flow, and it also helps the fall of the dust.
逆气流吹风清灰袋式除尘器
Reverse air blowing dust cleaning bag filter
3、机械清灰式
3. Mechanical cleaning
这种清灰方式可以包括人工振打、机械振打等,是一种最简单的清灰方式。
This cleaning method can include manual beating, mechanical beating, and so on. It is the simplest way to remove dust.
一般来说,机械振打的滤袋沿轴向的振动分布不均匀,而且加速度衰减较快,滤袋长度一般较短,过滤风速也较小。机械振动清灰袋式除尘器采用机械运动装置使滤袋作周期性振动,使粘附在滤袋上的尘粒落入灰斗中。
Generally speaking, the vibration distribution of the filter bag in the mechanical vibration is not uniform along the axial direction, and the acceleration attenuation is faster, the length of the filter bag is generally short, and the filtering wind speed is small. The mechanical vibration cleaning bag type dust remover adopts mechanical movement device to make the filter bag vibrate periodically, so that the dust particles adhering to the filter bag fall into the ash hopper.
机械清灰袋式除尘器
Mechanical dust cleaning bag type dust collector
根据振动方式不同,可分为水平振动、垂直振动、扭曲振动三种形式,如下图所示。
According to different vibration modes, they can be divided into three forms: horizontal vibration, vertical vibration and torsional vibration, as shown in the following figure.
三种振动方式
Three modes of vibration
(a) 为水平振动,有顶部和中部振动两种;
(a) for horizontal vibration, there are two kinds of vibration: top and middle.
(b) 为垂直振动,它利用偏心轮装置振打滤袋框架或定期提升滤袋框架进行清灰;
(b) for vertical vibration, it uses the eccentric wheel device to vibrate the filter bag frame or periodically lift the filter bag frame for dust removal.
(c) 为扭曲振动,它利用机械传动装置定期将滤袋扭转一定角度,使尘粒脱落。
(c) for torsional vibration, it uses mechanical transmission device to periodically filter the bag at a certain angle to make the dust fall off.

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