What effect will the bag filter be blocked

What is the impact of a clogged bag filter? The main reason for the blockage is that the filtration rate is too high, the dust is too fine, the dust is sticky, the filter bag is not cleaned, and the filter bag is wet. So let's look down together.

1. If the filtering wind speed exceeds the design standard of the filter bag, it is easy to cause the fine dust in the exhaust gas to get stuck in the filter bag fiber, which will cause the filter bag to block;

2. For highly viscous dust, reduce the air speed of the filter, or increase the pulse blowing pressure, or use an offline pulse bag filter to clean the filter bag, but a better way is to increase the filter area to reduce the filter speed and extend the filter The service life of the bag;

3. The main reasons for poor cleaning of the filter bag include: too long cleaning time and too long cleaning time. Excessive dust cleaning time will easily loosen the fiber structure of the filter bag and increase the fine dust in the exhaust gas, thereby clogging the filter bag. Too long dust cleaning time will wash off the initial powder layer on the surface of the filter bag and affect the dust removal efficiency.

However, if the cleaning time is too short and the dust on the surface of the filter bag has not been completely cleaned, the filter will start immediately. Dust will gradually accumulate on the surface of the filter bag, which will cause the filter bag to become clogged. In order to solve this problem, it can be adjusted through several trial runs;

4. Reasons for the dampness of the filter bag: the filter housing of the filter bag is not sealed, resulting in water leakage and humid air entering. The compressed air used for blowing and removing dust is not clean. In places, the compressed air used for dust removal can be used to increase heat preservation, temperature rise, oil removal and water removal. After closing the bag filter, dust removal will last for ten to twenty minutes;

5. Moisture is the main factor for the blockage of the bag filter bag. The cause of moisture is usually condensation at low temperatures, especially when dealing with combustion or high-temperature flue gas. The following methods can be used to prevent this:

1) Avoid improper startup. It should be opened and dried in advance according to standard procedures.

2) Avoid starting the dust collector when the resistance is high. After closing, if there is condensation on the surface of the filter bag, restart the machine. At this time, a lot of dusty air will enter, and high humidity will make the surface of the filter bag turbid. To prevent this from happening, the dust air at the entrance of the dust collector should be preheated, or the dust layer should be pre-coated.

3) Avoid starting below the dew point. When the bag filter is operated below the dew point, problems are prone to occur. If the air inlets are unevenly distributed, it is easy to cause local corrosion of the dust collector shell. Therefore, work below the condensation point should be avoided, and heat preservation devices should be used in time.

4) Avoid air infiltration. Air infiltration often occurs in the flange of the dust collector, inspection door or movable equipment of the dust collector. If the seal is not strong, outside air will enter the dust collector. When processing high-temperature exhaust gas, a low-temperature area will be generated inside the dust collector, causing low-temperature condensation to corrode the dust collector and bring moisture to the filter bag.

The above is the reason for the blockage of the bag filter. Thank you for your attention and support. I hope that the content shared above can help everyone. See you next time!