Selecting the filter speed of bag dust collector is key. It should be based on the type of smoke or dust. It should consider where it will be used. It should also consider dust size, thickness, and gas temperature. Also, it should consider moisture, dust levels, and filter materials. Select a low value when the dust particles are fine. Also, when the temperature and humidity are high. And when the concentration and viscosity are high. For example, ≤1m/min; otherwise, a high value can be selected, generally not exceeding 1.5m/min. For large dust particles, pick 1.5~2m/min. They’re at normal temperature, dry, and not sticky. They’re at extremely low concentration. When selecting the filter speed, find the net filter wind speed. This is when the filter area of one room is reduced (when cleaning). It should not exceed the above value. The actual working conditions on site can take a high value. So what is the most appropriate filter wind speed for the bag dust collector?
This involves the type of dust. For particularly fine dust, such as smoke, we need to take less than 0.8m/min. For slightly larger particles but soft dust, we can take about 1.2m/min.
We all know that there are many fiber holes on the dust bag for filtering. The size of the filtering wind speed can actually be felt most intuitively. If the speed is fast, some fine dust will easily be affected by inertia and run out through the fiber holes. This is why we need to limit the most reasonable filtering wind speed.
Putting aside the cost, the lower the filtering wind speed, the better the dust removal effect. The lower the filtering wind speed, the direct benefits are:
1. The equipment has low running resistance. This is because the wind that filters is slow, so dust accumulates slowly. Also, the pulse can spray and knock off the dust in time.
2. The dust removal effect is improved. As mentioned earlier, the dust will go out the hole quickly. The emission concentration will be higher when the dust is going out fast. The reverse is also true.