When the dusty gas enters the ash hopper through the lower intake pipe of the dust collector and the guide plate, due to the collision of the guide plate and the decrease in gas velocity, coarse dust particles will fall into the ash hopper, while the remaining fine dust particles will enter the filter bag chamber with the gas. Due to the inertia, diffusion, barrier, hooking, static electricity and other effects of the filter fiber and fabric, the dust is trapped in the filter bag, and the purified gas escapes from the bag and is discharged through the exhaust pipe. The accumulated dust on the filter bag is removed by gas backwashing method, and the cleaned dust is discharged to the ash hopper and discharged to the ash conveying device through the double-layer ash discharge valve. The dust accumulation on the filter bag can also be removed by spraying pulse airflow to achieve the purpose of cleaning, and the cleaned dust is discharged by the ash discharge device.
Advantages of pulse type bag filter equipment
① High dust removal efficiency: generally above 99%, the dust concentration in the outlet gas of the dust collector is within tens of mg/m3, and it has a high classification efficiency for fine dust with sub micron particle size;
② The range of air volume processing is wide: small ones can reach only a few cubic meters per minute, while large ones can reach tens of thousands of cubic meters per minute. It can be used for dust removal of flue gas in industrial furnaces and kilns, reducing the emission of atmospheric pollutants;
③ High filtration accuracy: filtration accuracy of 0.3 μ m, air leakage rate<0.1%, ultra clean emissions;
④ Strong economy: On the premise of ensuring the same high dust removal efficiency, the cost is lower than that of electrostatic precipitators;
⑤ High temperature resistance: When using high-temperature resistant filter media such as glass fiber, polytetrafluoroethylene, P84, etc., it can operate under high temperature conditions above 200 ℃;
⑥ Strong adaptability: insensitive to the characteristics of dust, unaffected by dust and resistance;
⑦ Appropriate structure: The system has a compact structure and occupies a small area;
⑧ Stable operation: Suitable for hundreds of working conditions, reliable operation, long service life.
