Bag dust collector name from the dust collection part of the bag. The textile cloth or filter bag is suspended in the device. When the air flow passes through the bag, the dust in the bag will be accumulated and spread on the bag. The accumulated dust layer also collects dust, so the dust collection rate increases as the operation progresses. In all dust collection devices, bag dust collector efficiency is the highest, but also has stable performance, and the bag is physical spread, dust collection rate is basically not affected by dust characteristics.

Dust collection mechanism includes dust diffusion, shielding and inertial collision. The smaller the particle size is, the more significant the diffusion effect is, while the larger the particle size is, the more significant the occlusion and inertial collision effect is. Therefore, there is an area where dust collection is not effective. The lowest dust collection rate was in the range of 0.5μm. For nanoparticles, such as particles around 10μm, it is relatively simple to assemble. In fact, the dust layer accumulated on the bag can also produce the spread effect. Therefore, the extreme correlation with particle size is not very common, but you can see the approximate correlation. With the continuous accumulation of dust on the bag, the pressure loss gradually increases, so every time after a period of time, the need to shake off the dust accumulated on the bag.

The electric dust collecting device uses the discharge from the discharging electrode (negative electrode) to make the dust into negative ions, and then the dust collecting electrode (positive electrode) to spread. Obviously, the dust collection rate is affected by the dust resistivity. The dust of low resistance gives the negative electrode to the electrode on the half side where it is easy to get negative ions, namely the dust deposition pole, and brings the same positive charge with the electrode. Due to the repulsion force of the electrical, it will fly (fly again) into the airflow. On the contrary, the charge release rate of high-resistance dust on the dust collector pole is slow, which leads to the increase of voltage gradient in the accumulated dust layer, and then the air insulation damage occurs in the dust layer, and the positive ions generated by the insulation damage will move towards the electrode (reverse ionization). At the same time, the voltage gradient in the discharge electrode becomes slow, then the discharge becomes weak, although the increase of positive ions will increase the current value, but the number of negative ions decreases, resulting in low dust collection rate. Therefore, it is necessary to take control measures to ensure that even if the temperature changes, the change of dust resistance will not cause redispersion and reverse ionization.