Case Study:
High differential pressure in Cement Raw Mill solved with ePTFE membrane pleated bag
Location:
- USA: Texas - Austin
Operation:
Cement Raw Mill
Dust type:
Raw mill cement dust
Problem:
The Customer often needed to shut down due to high differential pressure issues. The reduced flow was decreasing production capacity at the plant. The unit was evaluated - a 67,500 ACFM / 115.000 m3/h dust collector containing 1020 bags - and learned that:
- Customer was pulsing multiple valves at once on the same header tank
- The cleaning system was undersized
Solution:
- Pleated bags with a high efficiency ePTFE membrane was installed.
- By increasing the filter media area and using a membrane media providing optimal dust release capacity, the air flow was increased and the operating differential pressure of the baghouse was lowered.
- Also, the cleaning system was overhauled to allow for only one valve to be fired per pulse, thus optimizing the cleaning arrangement.
TECHNICAL FACTS |
||
| BEFORE | AFTER | |
| Bag solution | Pleated bag solution | |
| Dusttype | Finish mill cement dust | |
| Filter model | Filter bag | Pleated bag |
| Media/cloth type | Polyester felt | Spun bond with ePTFE membrane |
| Length | 144”/3650mm | 40”/1000mm |
| Number of elements | 1,020 | 1,020 |
| Sqft in each element (Total) | 15sf/1,4m2 (15,300sf/1420m2) |
20sf/1,9m2 (20,400sf/3530m2) |
| Filter life | 2 years | 3 years |
Advantages:
- Lower operating Dp
- Reduced down time and maintainance cost
- Lower emissions
- Cost savings