Calculation method of air volume treated by bag filter
Calculation formula of air volume treated by bag filter: Air volume m3/h= sectional area of dust hood ㎡ x capture wind speed m/s x 3600s = filtering area ㎡ x filtering wind speed m/s x 60min The wind speed of bag filtration is generally about 0.8-1.2 rpm. 1. The average speed of flue gas before entering the dust collector x the cross-sectional area of the inlet of the dust collector. It should be noted that the unit should be unified, generally cubic meters per hour. 2. If it is a reconstruction project, it can be calculated according to the air volume of the rear induced draft fan. The air volume of the induced draft fan x 95% is the air volume of the dust collector. 3. The design of Yin dust collector is based on the working conditions. Take the medium frequency furnace with a diameter of 800 as an example. If a semi enclosed movable hood is used, the wind speed in the hood can be set to 1-1.2m/min, and the air volume of a single furnace can be about 5000. At the same time, according to different processes, the air leakage of the system must be considered. The core of industrial furnace dust removal lies in several points: accurate air volume calculation and appropriate Mars and flue gas temperature treatment. There is also the problem of preventing sticking bags. When selecting the dust collection bag according to the treatment air volume of the bag type dust collector, it is generally not allowed to make the dust collector operate under the condition of exceeding the specified air volume, otherwise the dust collection bag is easy to be blocked, the service life will be shortened, the pressure loss will be greatly increased or reduced, and the dust collection efficiency will also be reduced. However, the treatment air volume of bag filter should not be too large, otherwise it will increase the equipment investment and floor area, and can not achieve real energy conservation and environmental protection. The reasonable selection and treatment of air volume are often based on process conditions and accurate calculation.