一、脉冲除尘器简介脉冲除尘器，是以压缩空气为清灰动力，利用脉冲喷吹机构在瞬间放出压缩空气，诱导数倍的二次空气高速摄入滤袋，使滤袋急剧膨胀，依靠冲击振动和反向气流而清灰的除尘器。脉冲式除尘器是一种除尘净化设备，采用脉冲喷吹的清灰方式，具有清灰效果好、净化效率高、处量大、滤袋寿命长、维修工作量小、运行可靠等优点；但需要压缩空气，而且当供给的压缩空气压力不能满足要求时，请回效果会大大降低。由于脉冲袋式除尘器优点突出，所以，它的应用越来越广泛。脉冲除尘气具有多种形式，如逆喷、顺喷、对喷、旋转喷吹等。吹气源压为低于0.25MPa者成为低压喷吹；吹气源压为高于0. 5MPa者成为高压喷吹。二、脉冲除尘器工作原理图以脉冲袋式除尘器为例，工作原理如下图所示。脉冲阀一端接压缩空气包，另一端接喷吹管，脉冲阀背压室接控制阀，脉冲控制仪控制着控制阀及脉冲阀开启。

1、 Introduction to Pulse Dust Collector Pulse dust collector is a dust collector that uses compressed air as the cleaning power, and uses a pulse blowing mechanism to instantly release compressed air, inducing several times the secondary air to enter the filter bag at high speed, causing the filter bag to rapidly expand, and relying on impact vibration and reverse airflow to clean the dust. Pulse type dust collector is an efficient dust removal and purification equipment that uses pulse blowing for dust cleaning. It has the advantages of good dust cleaning effect, high purification efficiency, large gas processing capacity, long filter bag life, low maintenance workload, and safe and reliable operation; But compressed air is required, and when the supplied compressed air pressure cannot meet the requirements, the return effect will be greatly reduced. Due to the outstanding advantages of pulse bag filter, its application is becoming increasingly widespread. Pulse dust removal gas has various forms, such as reverse spray, forward spray, counter spray, rotary spray, etc. If the blowing source pressure is lower than 0.25MPa, it becomes low-pressure blowing; A blowing source pressure higher than 0.5 MPa is called high-pressure blowing. 2、 The working principle diagram of the pulse dust collector takes the pulse bag filter as an example, and the working principle is shown in the following figure. One end of the pulse valve is connected to the compressed air bag, and the other end is connected to the spray pipe. The back pressure chamber of the pulse valve is connected to the control valve, and the pulse controller controls the opening of the control valve and pulse valve.

当控制仪无信号输出时，控制阀的排气口被关闭，脉冲阀喷口处关闭状态；当控制仪发出信号时控制排气口被打开，脉冲阀背压室外的气体泄掉压力降低，膜片两面产生压差，膜片因压差作用而产生位移，脉冲阀喷吹打开，此时压缩空气从气包通过脉冲阀经喷吹管小孔喷出(从喷吹管喷出的气体为一次风)。当高速气流通过文氏管诱导器诱导了数倍于一次风的周围空气（称为二次风）进入滤袋，造成滤袋内瞬时正压，实现清灰。了解脉冲除尘器的基础知识，是设计或正确选型的基础。并且，根据我们过去积累的经验，我们还对脉冲除尘器清灰装置的选型理论做了如下论述。三、脉冲除尘器清灰装置的选型设计脉冲除尘器清灰装置由脉冲阀、喷吹管、贮气包、导流器和控制仪等几部分组成。其设计选型主要包括气源气包设计、喷吹管设计和电磁脉冲阀选型3大项。

When there is no signal output from the controller, the exhaust port of the control valve is closed and the pulse valve nozzle is in a closed state; When the controller sends a signal, the control exhaust port is opened, and the gas outside the pulse valve back pressure chamber is released, reducing the pressure. A pressure difference is generated on both sides of the diaphragm, and the diaphragm is displaced due to the pressure difference. The pulse valve is blown open, and at this time, compressed air is blown out from the gas bag through the pulse valve through the small hole of the blowing pipe (the gas sprayed out from the blowing pipe is primary air). When the high-speed airflow induces several times the surrounding air (called secondary air) through the Venturi tube inducer to enter the filter bag, causing instantaneous positive pressure inside the filter bag and achieving dust cleaning. Understanding the basic knowledge of pulse dust collectors is the foundation for designing or selecting them correctly. Moreover, based on our accumulated experience in the past, we have also made the following discussion on the selection theory of the pulse dust collector cleaning device. 3、 The selection and design of the pulse dust collector cleaning device. The pulse dust collector cleaning device consists of several parts such as pulse valve, spray pipe, gas storage bag, guide vane, and control instrument. The design selection mainly includes three items: gas source package design, spray pipe design, and electromagnetic pulse valve selection.

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