The pulse bag filter is mainly composed of upper box (clean air chamber), middle box (dust chamber), ash hopper, pulse ash cleaning system, filter bag, filter bag skeleton, air inlet and inlet, differential pressure meter, maintenance manhole, ash discharge device, and pL c controller. Its working principle is: pulse bag filter driven by the power of the fan, the dust collector inside, dust removal pipeline and dust cover mouth to form a negative pressure environment, so that the dust of the dust point enters the dust collector under the action of pressure difference, the air flow is filtered through the dust filter bag, the dust is trapped on the surface of the bag, and the pulse signal is regularly input to the pulse valve through the pLC controller. The high wind of the compressed gas blows away the ash tip attached to the surface of the filter bag and collects it to the ash hopper, in order to achieve the purpose of dust collection. The treated clean gas is exhausted from the smoke volume by means of a dust collector fan

The structure of pulse bag filter mainly consists of the following parts:

1. Box: including bag room, pre-dust removal room, clean gas chamber, porous plate, filter bag, filter bag skeleton. The box design is pressure-resistant 9000Pa.

2. Injection system: including main air pipe, injection pipe, pulse valve and controller.

3. There are two forms of ash hopper and ash discharge part: - One is to connect the ash hopper directly to the ash discharge valve, and the other is to connect the ash hopper to the ash discharge valve through the conveying equipment (such as as a screw conveyor).

The pulse bag filter is the heart of the bag filter, which mainly plays the role of filtering dust. When the dust-containing gas passes through the dust bag, the dust is blocked by the bag, and the purified air is sucked away by the induced draft fan. The amount of dust accumulated on the surface of the cloth bag is increasing, which increases the resistance of the dust collector. At this time, the pulse controller gets a signal, blows the cloth bag, so that the dust falls into the ash hopper, and the dust collector is discharged from the discharger.

Pulse bag filter generally adopts round filter bags, which are divided into two types: circular air inlet and bottom air inlet according to the flow direction of dust-containing gas. This type of dust collector usually consists of - upper box (clean air chamber), - - medium box, - ash hopper, - frame and a pulse injection device. When the dust-containing gas enters the ash hopper from the lower part of the box, the flow rate decreases due to the sudden expansion of the cross-sectional area of the air flow, and some of the coarser and dense dust particle gas flows in it settle in the ash hopper under the action of gravity; After the low-density dust particles enter the bag dust removal room, the dust falls on the surface of the filter bag through the combined action of inertia, collision, screening, interception and static electricity on the surface of the filter bag. Filter the bag and form a dust layer. The purified gas enters the clean air chamber and is exhausted from the exhaust pipe by a fan. The resistance value of the bag filter varies with the surface of the filter bag. The thickness of the upper dust layer increases. However, it should be noted that in order to obtain higher gas dust removal efficiency, only - part of the dust layer is destroyed and removed from the filter material during the dust removal process, and instead of completely cleaning the dust on the filter bag.