The dust removal effect of the bag filter depends on the ten factors, which directly affect the purification effect and service life of the bag filter. Today, we probably talk about these ten factors.

1.Selection of filter bag: the bag should choose abrasion resistance, high temperature resistence materials, such as glass fabric / felt, Nomex, needle felt, P84 needle punched felt. Considering the wear resistance, high temperature resistance, cost and other factors, copper industry generally use the Nomex needle felt.

2. Control of temperature: Generally Nomex bag bear the temperature of 200℃, therefore the inlet temperature of facility should be controlled below 200℃. The smoke passes by a long pipe and reaches to the dust collector box, then the temperature can drop to below 200℃. Under the special circumstances, the water cooling could be processed, while the cooler should be installed in the total pipe.

3. Selection of the fan: T he draught fan is better than the air feeder.

4. Mechanical dust removal is more convenient and clean than mannual dust removal, but the mechanical dust removal is with high cost. Now most enterprises adopts the method of pulse dust removal.

5. Air leakage and resistance: Theoretically, the bag filter dust removal efficiency can reach to 99%, but less than the measured in fact, mainly influenced by the air leakage and resistance. The air leakage rate is lower, then the dust removal effect is better. The resistance have certain influence on the dedusting effect, therefore it’s required to empty bag ususally so as to reduce the resistance and then improve the dust removing effect.

6. The dust cover should be close to the furnace head, so that dust can easily enter the cover, increase the amount of dust, reduce the non organization pollution.

7. Equipment maintenance: Instrument equipment and bags are easy to damage, therefore it should be promptly repaired and replaced the bag.

8. Air velocity: In the air velocity of 1～3 m/s, the dust removal effecenciy is the best with the average wind speed controlled in 2 ~ 4 m/s.

9. Filter area: The greater the filter area is, the higher the dust removal efficiency is, but the cost will be improved accordingly. Therefore, we should calculate the air quantity, and then select the corresponding dust collector model.

10. Two stage dust removal: In front of the dust collector box, it is equipped with a settling chamber, forming the two stage dust removal. The settling chamber can remove a part of the large particles of dust, reduce the temperature and reduce the pressure of the dust collector.