The boiler bag filter has been recognized and applied by more people, which means that in the boiler industry, the boiler bag filter is a necessary requirement. Due to the different classification methods of boiler bag filters, they can be divided into many types and can be used for different dust and enterprise operating conditions. Let's talk about the classification based on the working status of boiler bag filters. Dust collectors can be divided into two categories: positive pressure dust collectors and negative pressure dust collectors. According to its working temperature, it can be divided into two categories: room temperature dust collectors and high-temperature dust collectors. According to the size of dust collectors, they can be divided into four categories: small dust collectors, medium dust collectors, large dust collectors, and super large dust collectors.

现在我们详细讲解一下锅炉布袋除尘器的正压和负压式除尘的区别及效果

Now let's explain in detail the differences and effects of positive pressure and negative pressure dust removal in boiler bag filters、

正压式锅炉布袋除尘器：风机设置在除尘器之前，除尘器在正压状态下工作。由于含尘气体先经过风机，对风机的磨损较严重，因此不适用于高浓度、粗颗粒、高硬度、强腐蚀性的粉尘。

Positive pressure boiler bag dust collector: The fan is set before the dust collector, and the dust collector operates under positive pressure. Due to the fact that dusty gases first pass through the fan and cause severe wear on the fan, they are not suitable for high concentration, coarse particles, high hardness, and strong corrosive dust.

负压式锅炉布袋除尘器：风机置于除尘器之后，除尘器在负压状态下工作，由于含尘气体经净化后在进入风机，因此对风机的磨损较小，这种方式采用较多。

Negative pressure boiler bag dust collector: The fan is placed behind the dust collector, and the dust collector operates in a negative pressure state. Due to the purified dust containing gas entering the fan, the wear on the fan is relatively small, and this method is commonly used.

而对于锅炉除尘的复杂性，单单依靠一种类型的除尘器亦不能达到要求，所以，在提高除尘效率的前提下，有的企业单位就会设置多级除尘：在前级设粗颗粒除尘装置，后级设细颗粒除尘装置的各类串联组合式除尘装置。比如在锅炉布袋除尘器前加一级二级脱硫设备，加降温除尘设备等，或有的需加旋风除尘设备等。

For the complexity of boiler dust removal, relying solely on one type of dust collector cannot meet the requirements. Therefore, in order to improve dust removal efficiency, some enterprise units will set up multi-level dust removal: various series combination dust removal devices with coarse particle dust removal devices in the front stage and fine particle dust removal devices in the rear stage. For example, adding primary and secondary desulfurization equipment, cooling and dust removal equipment, or some requiring cyclone dust removal equipment in front of the boiler bag filter.