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.

現在我們詳細講解一下鍋爐布袋除塵器的正壓和負壓式除塵的區別及效果

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

正壓式鍋爐布袋除塵器：風機設置在除塵器之前，除塵器在正壓狀態下工作。由于含塵氣體先經過風機，對風機的磨損較嚴重，因此不適用于高濃度、粗顆粒、高硬度、強腐蝕性的粉塵。

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.

負壓式鍋爐布袋除塵器：風機置于除塵器之后，除塵器在負壓狀態下工作，由于含塵氣體經凈化后在進入風機，因此對風機的磨損較小，這種方式采用較多。

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.

而對于鍋爐除塵的復雜性，單單依靠一種類型的除塵器亦不能達到要求，所以，在提高除塵效率的前提下，有的企業單位就會設置多級除塵：在前級設粗顆粒除塵裝置，后級設細顆粒除塵裝置的各類串聯組合式除塵裝置。比如在鍋爐布袋除塵器前加一級二級脫硫設備，加降溫除塵設備等，或有的需加旋風除塵設備等。

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.