1. **Dust characteristics**:
- **Particle size distribution**: The average particle size and distribution range of dust affect the selection of filter bags.
- **Viscosity**: Dust with strong viscosity is more likely to adhere to the filter bag, and it is necessary to select a filter bag that is easier to clean.
- **Humidity**: Dust with high moisture content may cause the filter bag to be damp, affecting the filtration efficiency.
2. **Airflow velocity**:
- Airflow velocity has a direct impact on the filtration efficiency of the filter bag.
- Normally, the airflow velocity should be controlled between 0.5 and 1.5 m/s to ensure a good filtration effect.
3. **Filter bag material**:
- Filter bags of different materials have different filtration effects on different types of dust.
- Common materials include polyester, glass fiber, PTFE (polytetrafluoroethylene), etc., and each material has its applicable range.
4. **Filter area**:
- The filter area is an important parameter for determining the size of the filter bag.
- Calculate the total filter area required based on the air volume and dust load.
5. **Filter bag shape**:
- Filter bag shapes include cylindrical, flat, etc.
- Cylindrical filter bags are suitable for most situations, while flat filter bags are more suitable when space is limited.
6. **Filter bag length**:
- The filter bag length is directly related to the filter area.
- Longer filter bags can provide a larger filter area, but will also increase resistance loss.
7. **Filter bag diameter**:
- The filter bag diameter affects the surface area and airflow distribution of the filter bag.
- Generally speaking, filter bags with larger diameters can provide better filtration performance.