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The effect of smoke on dust filter bag

Author: Site Editor     Publish Time: 2021-10-20      Origin: Site


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The dust filter bag is one of the main dust removal parts of the bag filter, which can isolate harmful fumes and protect the environment and human health. However, in industrial production, there are many factors that affect it, among which flue gas is very serious. Let's take a look at the effect of smoke on the dust filter bag.

  (1) The flue gas temperature is high. The bag filter is mainly used for dust removal of flue gas in 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 flue gas when it enters the dust collector is generally about 100 ℃ ~ 300 ℃. Therefore, the performance of ordinary chemical fiber will be affected at this temperature, so the filter material of the bag filter is a high temperature resistant fiber material.

  (2) Acidic flue gas corrosion. When burning high-sulfur coal or flue gas without desulfurization treatment, the concentration of sulfur oxides and nitrogen oxides will be very high. Except for the filter bag of the FT filter material, other chemical synthetic fiber materials will be corroded and damaged, thus shortening the filter bag Life.

   (3) Oxidation of flue gas. The flue gas has a certain oxidation effect on the dust bag. Because the oxygen in the air accounts for 21%, and the temperature of the flue gas is very high, the dust bag will be greatly affected during work. If you want to avoid this situation, you should choose some dust bags with anti-oxidation filter materials, such as P84 polyimide, PPS, PTFE dust bags.

  (4) Moisture in flue gas. During high temperature operation, when the moisture content of the dust in the flue gas exceeds 25%, the dust is easy to stick to the cloth bag and block the cloth bag. If the hydrolysis resistance of the material is not high, hydrolysis will also damage the filter material. 

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