1. The unit of air volume is expressed in m3 / min and m3 / h, but attention must be paid to the place where the dust collector is used and the temperature of flue gas. High temperature gas contains a lot of moisture, so the air volume is not expressed by dry air but by wet air, and moisture is expressed by volume fraction.
2. Because the performance of the bag filter depends on the actual filtration wind speed of the wet air, if the treatment temperature of the bag filter has been determined, and the dilution method is adopted for the cooling of the gas, the amount of dilution air should be added to the treatment air volume of the bag filter at this temperature. When calculating the required filtration area, the filtration velocity is the actual filtration velocity.
Bag filter equipment
3. In order to adapt to the change of dust source, the bag filter can be designed according to the maximum air volume when several reserve quantities are added to the normal air volume in the dust collector design. If the bag filter operates in excess of the specified treatment air volume and filtering wind speed, its pressure loss will increase greatly, the filter cloth may be blocked, the dust removal efficiency will also be reduced, and even become the reason for the sharp increase of other fault frequency. However, if the reserve is too large, the investment cost and operation cost of bag filter will be increased.
4. Due to the change of dust source temperature, the treatment air volume of bag filter also changes. However, the maximum value of air volume should not be calculated based on the misoperation of dust source and occasional fault.
5. Once the treatment air volume is determined, the required filtering area can be determined according to the determined filtering wind speed. The filtering speed is greatly different due to the different types of bag filter, filter cloth and type, and production operation process.
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