Influence factors of low efficiency of bag filter

The final purpose of installing a bag filter is to complete the dust removal and purification of working conditions to meet the requirements of national environmental protection, the atmosphere is not polluted, and the people are healthier. So how can we improve the dust collection efficiency of the bag filter and what are the main factors affecting the bag filter?

1.Dust-removing cloth bag is made of wear-resisting and high-temperature-resistant materials, such as glass fiber cloth/felt, NOMEX, needle felt, P84 needle felt, etc., taking into account the wear resistance, high temperature and cost of the filter bag, the copper industry General use of high-temperature materials, such as fiberglass composite felt, aramid needle felt, P84 needle felt, etc., we will according to the actual conditions of the customer, to the customer recommended the best cost-effective filter.

2. The general filter bag withstand temperature is 200 °C, so the processing facility inlet temperature should be controlled below 200 °C, when the flue gas after the long smoke pipe reaches the dust collector box, the temperature can drop below 200 °C, special conditions When it is possible, it can be water-cooled and a cooler can be installed at the main pipe.

3. The use of induced draft fan is better than blower.

4. Calculate bag filter dust removal efficiency by 99% theoretically, but it can not be achieved in actual measurement, mainly due to the effect of air leakage and resistance. The lower the air leakage rate, the better the dust removal effect; The resistance has a certain impact on the dust removal effect, often empty filter Bags, reduce resistance, improve dust removal.

5. The dust cover should be as close as possible to the burner to make it easier for dust to enter the cover, increase the amount of dust collected, and reduce unorganized emission pollution.

6. Instruments and equipment and bags are easy to damage should be repaired and replaced bags.

7. At a flow rate of 1 to 3 m/s, the dust removal effect is optimal, and the general wind speed is controlled at 2 to 4 m/s.

8. The larger the filter area, the higher the dust removal efficiency, but the cost will increase accordingly. Therefore, the air volume should be calculated in advance, and then select the corresponding dust collector model.