The influence of flue gas on high temperature dust filter bag

The dust filter bag is the primary dust removal tool of the bag filter. It can isolate 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 flue gas is the most important factor in industrial production. Let's take a look at the effect of flue gas on the dust filter bag:

(1) High temperature of flue gas. The bag filter is mainly used in the 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 usually relatively high, and the temperature of the gas is usually around 100 ℃ ~ 300 ℃ when the gas is passed into the dust collector. Therefore, the function of ordinary chemical fibers will be affected at this temperature, so the filter material of the bag filter must use high temperature resistant fiber materials.

(2) Corrosion of acid gas. 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. Except for the dust filter bag of the FT filter material, other chemical synthetic fiber materials will be corroded and damaged. , So the life of the dust filter bag will be shortened.

(3) Oxidation effect of flue gas. The flue gas has a certain oxidizing effect on the dust filter bag. Because the oxygen in the air accounts for 21%, and the temperature of the flue gas is very high, the dust filter bag will be harmed during operation. If you want to avoid this situation, just Choose some dust bag with anti-oxidation effect filter material, for example, dust bag made of P84 polyimide material.

(4) Moisture in the flue gas. Working under high temperature conditions, when the moisture content of the dust in the flue gas exceeds 25%, the dust will easily stick to the bag and block the bag. If the anti-hydrolysis function of the material is not high, the hydrolysis effect will also cause the filter material to be affected. damage.