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Pneumatic Dust Control in Grain Elevators Guidelines for Design Operation and Maintenance (1982) / Chapter Skim
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Dust Filters
Pages 29-36

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From page 29...
... The cyclone, on the other hand, does not collect fine or very light particles effectively. A well operated filter collects particles at an overall efficiency of more than 99 percent.
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From page 30...
... 30 Valve Body Assembly: -Plenum Chamber -Butterfly Valve Reverse Air Pressure Blower -- r- Rotating (_J Chamber Drive Magnehelic Gauge ; I- .- / Dust '.' ' - -- ; Laden '. Wire Sleeves with Filter Stockings Bin Level Indicator Rotary Air Lock Discharge FIGURE 4-1 Typical fabric filter.
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From page 31...
... Furthermore, ratios higher than recommended above sometimes give less effective dust control. Lower air-to-cloth ratios tend to minimize maintenance, increase bag life, reduce pressure loss and energy costs, and give generally more trouble-free operation.
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From page 33...
... Filter Materials and Construction Materials and type of construction for a bag filter should be selected on three general grounds; ease of assembly and installation; service life; and maintenance requirements. The optimum materials and construction may vary for particular installations.
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From page 34...
... Disposal of Collected Dust Grain dust discharged from a filter remains a serious fire and explosion hazard. The collected dust should always be disposed of with these hazards in mind.
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From page 35...
... Disposal Alternatives Alternative methods of dust disposal are slurrying in water and agglomerization or palletization. Particularly at elevators associated with processing plants, water containing slurried dust can be employed in the process.
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From page 36...
... On the other hand, the filter is less efficient. The reason is that the larger particles captured by the cyclone would otherwise contribute to the collection efficiency of the mat of dust that builds up on the filter fabric.
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Key Terms

  • collected dust
  • grain stream
  • grain dust
  • bag filter
  • dust loading

  • dust release
  • grain industry
  • filter collectors
  • filter materials
  • filter collects

  • dust collected
  • grain elevator
  • pressure loss
  • bag life
  • pressure rating

  • air lock
  • woven media
  • explosion hazard
  • coastal belt
  • larger particles

  • light particles
  • reverse flow
  • energy costs
  • dust grain
  • effective dust

  • dust dislodged
  • dust storage
  • filter collector
  • airborne dust
  • dust discharged


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