Little knowledge about bag dust collector

Bag dust collector is a kind of dust removal equipment that uses organic fiber or inorganic fiber filter material to filter out dust in dust-containing gas. Suitable for collecting fine, dry, non-sticky and fiber-free industrial dust. Let's see how it works.

Filter dust collector refers to a device that realizes gas-solid separation when the dusty smoke holes pass through the filter layer. The dust particles in the air flow are intercepted by the filter layer.

Filtration and dust removal devices include bag dust collectors and particle layer dust collectors. The former usually uses filter bags made of organic fiber or inorganic fiber fabrics as the filter layer, while the latter's filter layer mostly uses particles of different particle sizes, such as quartz sand, which is composed of river sand, ceramsite, slag, etc.

Bag dust collector is a dry dust removal device. Suitable for capturing fine, dry, non-fibrous dust.

The filter bag is made of textile filter cloth or non-woven fabric, and uses the filtration function of the fiber fabric to filter dust-laden gas. After the dust-containing gas enters the bag dust collector, large particles and large specific gravity dust will be removed. When the air containing fine dust passes through the filter material, the dust will be blocked and the air will be purified. The dust removal efficiency of new filter materials is generally not high.

Bag dust collector is a dry dust removal device. After the filter material is used for a period of time, a layer of dust accumulates on the surface of the filter bag due to screening, collision, interception, diffusion, static electricity, etc. This layer of dust is called the first layer. The main filter layer of the filter material depends on the function of the first layer. Filter materials with larger meshes can also achieve higher filtration efficiency.

As dust accumulates on the surface of the filter material, the efficiency and resistance of the bag dust collector will increase accordingly. When the pressure difference on both sides of the filter material is large, some fine dust particles that have adhered to the filter material will be squeezed out. Reduce dust collector efficiency. In addition, high resistance power will greatly reduce the air volume of the dust removal system.

Therefore, after the filter resistance reaches a certain volume, the dust should be cleaned in time. When cleaning dust, please do not damage the first layer to avoid loss of efficiency. As the powder repeatedly adheres to the outer surface of the filter bag, the powder layer becomes thicker and the resistance value of the bag filter also increases. The pulse valve diaphragm issues the command. When the left and right sides are submerged, the pulse valve opens and the compressed air in the high-pressure air bag passes. If there is no dust or the dust is small enough, the mechanical dust removal will stop working.