Influence of flue gas on dust filter bag

Influence of flue gas on dust filter bag

The dust filter bag is the primary dust removal tool of the bag filter. It can block harmful gases and protect the environment and human health. However, in industrial production, there are many factors that have an impact on it, and the most significant impact is flue gas. Let's take a look at the effect of flue gas on the dust filter bag:

(1) High temperature of flue gas: Bag filter is mainly used for flue gas dust removal of industrial boilers, fluidized bed boilers, kilns and coal-fired power station boilers. The temperature of this kind of flue gas is generally relatively high, and the temperature when the gas is passed into the dust collector is generally controlled at 100 ℃ ~ 300 ℃. Therefore, the function of the general chemical fiber will be affected at this temperature, so the filter material of the bag filter must use high temperature resistant fiber materials.

(2) Acid gas corrosion: When burning high-sulfur coal or flue gas that has not been desulfurized, the concentration of sulfur oxides and nitrogen oxides will be very high. In addition to the dust filter bag of the FT filter material, other chemical synthesis Fiber materials will be damaged by corrosion, so the life of the dust bag will be shortened.

(3) Oxidation of the flue gas: The flue gas has a certain oxidation effect on the dust filter bag, and the temperature of the flue gas is very high, so the dust collection bag will be deeply harmed during operation. If you want to prevent this, It is necessary to choose some dust bag with anti-oxidation filter material, for example, dust filter bag made of P84 polyimide material.

(4) Moisture in the flue gas: When working under high temperature conditions, dust will tend to stick and block bags. If the material's anti-hydrolysis function is not high, the hydrolysis will also damage the filter material.