The difference in gas humidity and other factors has a […]
The difference in gas humidity and other factors has a great influence on the running resistance of the bag filter.
The running resistance of the bag filter is caused by the filter bag, the main body and the dust adsorbed on the filter bag. Structural design, filter material, filtration wind speed, gas dust concentration, dust particle size, gas humidity and other factors have a great impact on the running resistance of the bag filter.
1. Is the structural design reasonable?
Includes inlet and outlet piping sections, large baghouses, wind turbines, cross-sectional dimensions of various components through which airflow passes, and design of locking air, access door seals and equipment insulation. Unreasonable structural design will make the equipment run with high resistance, and the reasonable structural design has a body resistance of about 400pa.
2, dust concentration
When the dust concentration is too high, the probability of collision between the particles increases, and the particles stick together, which also affects the running resistance of the bag filter. At the same time, an increase in concentration means that the thickness of dust adhering to the unit area of the filter bag will increase per unit time, and the pressure loss generated will also increase. In this case, the cleaning frequency is often used. The equipment works normally, but this will increase the frequency of expansion of the filter bag, strengthen the friction between the filter bag and the bag, reduce the service life of the filter bag, and invalidate the filter bag. Failure of the filter bag will result in increased pressure loss of the filter bag and high resistance to operation of the device. In addition, recoiling the positive pressure gas during the cleaning process is also one of the reasons for the high running resistance of the bag filter. Frequent injection of positive pressure gas into the bag chamber will inevitably increase the operational resistance of the equipment. Therefore, when the dust concentration is too high, the windshield homogenizing device should be added to the air inlet pipe and the ash hopper for pre-powder treatment to reduce the bag filter load of the bag filter and reduce the resistance of the equipment.