From food processing to coal handling to cement manufacturing, silos are used for bulk material storage in many industries.
Proper ventilation is critical to the preservation of the materials stored in silos. Bin vent dust collectors are often installed to filter and vent dust and debris that forms in the storage container.
Common goals for any manufacturing facility are to minimize unplanned equipment downtime and maintenance, maximize efficiency and lower operating costs. Lost production time and increased maintenance expenses work directly against the financial and production expectations of the business.
This was the case at one processing plant where multiple bin vent dust collectors were installed to vent silos. Operators were challenged with:
- Increased operating costs due to premature filter replacements (six months life) due to bottom bag abrasion.
- High differential pressure was causing a relief hatch to open frequently. The air to cloth ratio was higher than it should be for a silo application.
- Time-consuming and difficult removal and installation due to restricted access. The filters were so degraded that they had to be cut in order to be removed, extending dust collector downtime.
The plant turned to the filtration expertise of Parker Hannifin. Parker assessed the situation and recommended installing BHA® PulsePleat® Filter Elements as a versatile and cost-effective solution.
Standard benefits of BHA® PulsePleat® filter elements
- Spunbound polyester media provides superior filtration efficiency.
- Promote better airflow for increased throughput.
- Pleated design increases filtration surface area up to 4X.
- Molded bottom helps resist abrasive wear.
- Reduce air-to-cloth ratios.
- Reduce operating differential pressure.
- Reduce compressed air consumption.
- Eliminate the need for cages.
- Easy installation and removal.
- Installation typically requires no modification to existing equipment.
Additional benefits for the customer’s application
- At half the length of the original bags and cages, BHA® PulsePleat® filters wouldn’t extend as far into the inlet area. This would reduce the potential for abrasion and premature wear.
- The BHA filter design allows for more than double the cloth area. This would resolve the issue with the pressure relief hatch by handling the intermittent air flow without a dramatic increase in differential pressure.
- Finally, the smaller size of the BHA® PulsePleat® filters would reduce the total number of filters required by nearly to 50%.
The plant’s engineering and maintenance teams acted on Parker’s recommendation and installed BHA® PulsePleat® filters and realized the following results:
- Reduced the number of filters by 47%.
- Increased silo operating efficiency by reducing the amount of compressed air used.
- Reduced differential pressure from 6" w.g. to 3.5” w.g. The issue with the pressure relief hatch was completely eliminated.
BHA® PulsePleat® filters helped the customer save nearly $16,000 in the first three years. They are now seeing a regular cost savings of over $3,000 every six months.
This post was contributed by the Parker Industrial Gas Filtration and Generation Division.