Customer profile
Cement production generates large amounts of dust, which can overload filter systems if they are not designed for such a high dust load. This can reduce efficiency and increase emissions - as was the case with our customer in Portugal.
Location: Portugal
Results
Increase productivity by 10 percent
Reduction of emissions by 95 percent
Longer filter service life and efficient filter cleaning
High emissions and short filter service life
Challenges
Lower performance than expected as the dust separator is too small.
High emission values - 22 mg/Nm³/h.
Poor filter quality leading to rapid wear.
Unscheduled maintenance and downtime.
Replacement of conventional bag filters with pleated bag filters
The filter system has been upgraded with 240 Top Loader pleated bag filters, each equipped with 6m² of 100% synthetic media with an ePTFE membrane.
Reduction of emissions and increase in filter service life
Together with the customer, we installed the new pleated bag filters and compared the performance of the system over time.
General system information
| System parameters | System data |
| Air flow in the unit | 65,000 m³/h |
| Dust type | Cement |
| Operating hours of the collector | 4,000 hours/year |
Technical Specifications
| Before | After | |
| Filter model | Standard pleated bag filter | Top Loader CPB pleated bag filter from Hengst |
| Filter media | Synthetic | 100% synthetic media with ePTFE membrane |
| Length [mm] | 2.000 | 2.000 |
| Number of filter bags / cartridges | 240 | 240 |
| Filtration area in each pleated bag filter / filter cartridges [m²] | 1 | 6,24 |
| Filtration area in the entire system [m²] | 240 | 1.498 |
Hengst filters ensure a gain in productivity, a reduction in emissions and a longer filter service life
By converting to pleated bag filters with 100% synthetic media with an ePTFE membrane, the filtration area has been maximized and increased by 600%. This leads to productivity increases and significant emission reductions.
10% increase in productivity
The output of the cement mill increased from 27 t/h to 30 t/h. This corresponds to a 10% increase in productivity.
95% reduction in emissions
The emission value was reduced from 22 mg/Nm³/h to 1 mg/Nm³/h, which corresponds to a 95% reduction in emissions.
Longer filter life and efficient filter cleaning
The filter design eliminated the problem of the high pressure drop from 6 to 3 bar. The ePTFE membrane provides efficient dust cleaning, which means less air is required for cleaning and ultimately less energy is consumed.
Get in touch
Contact our team for any questions and support regarding Filter Cartridges, Pleated Bags & Flat Cells
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