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WET SCRUBBERS,
A R E “ W E T ” D U S T C O L L E C T O R S ,
T H E B E S T T Y P E O F E Q U I P M E N T
F O R C A P T U R...
WET SCRUBBERS AND
DRY MEDIA DUST COLLECTORS
ARE TWO VERY DIFFERENT
TECHNOLOGIES USED TO CAPTURE
COMBUSTIBLE DUSTS.
HIGH EFFICIENCY CARTRIDGE
MEDIA COLLECTORS
- MOST POPULAR FOR CAPTURING 			
INDUSTRIAL PROCESS DUST
- AVAILABLE WITH A WID...
WET SCRUBBERS
- FILTER DUST BY IMPINGEMENT
WITH WATER DROPLETS
- THE SMALLER THE DROPLET, THE MORE	
EFFICIENT THE SCRUBBER...
“iums”
ALUMINUM
HAFNIUM
MAGNESIUM
NIOBIUM
TANTALIUM
TITANIUM
ZIRCONIUM
As a general rule of thumb, wet scrubbers work best...
Dry media collectors offer a number of
operational advantages over wet scrubbers.
Efficiencies are much lower on scrubbers...
Sometimes the choice between a wet vs. dry
media system is not clear-cut. Dust testing is
the first step in the decision-m...
VISIT OUR WEBSITE
TO LEARN MORE!
www.camfilapc.com
content provided by:
JOHN DAUBER
HANDTE PRODUCT MANAGER, AMERICAS
CAMFIL AIR POLLUTION CONTROL
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Wet Scrubbers vs. Dry Dust Collectors

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There is no simple “yes” or “no” answer to this, as many factors can influence equipment selection. Wet scrubbers and dry media dust collectors are two very different technologies used to capture combustible dusts generated when materials are divided into fine particulate through manufacturing processes. Facility managers and engineers face a balancing act of finding the best and most cost-efficient equipment to minimize explosion hazards while also keeping emissions below required thresholds to safeguard workers’ health.

Published in: Environment
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Wet Scrubbers vs. Dry Dust Collectors

  1. 1. WET SCRUBBERS, A R E “ W E T ” D U S T C O L L E C T O R S , T H E B E S T T Y P E O F E Q U I P M E N T F O R C A P T U R E O F C O M B U S T I B L E D U S T S G E N E R A T E D I N P O W D E R A N D B U L K P R O C E S S I N G O P E R A T I O N S ?
  2. 2. WET SCRUBBERS AND DRY MEDIA DUST COLLECTORS ARE TWO VERY DIFFERENT TECHNOLOGIES USED TO CAPTURE COMBUSTIBLE DUSTS.
  3. 3. HIGH EFFICIENCY CARTRIDGE MEDIA COLLECTORS - MOST POPULAR FOR CAPTURING INDUSTRIAL PROCESS DUST - AVAILABLE WITH A WIDE CHOICE OF FILTRATION MEDIA - PERIODIC BURSTS OF COMPRESSED AIR DISLODGE THE DUST FROM FILTERS AND INTO A HOPPER
  4. 4. WET SCRUBBERS - FILTER DUST BY IMPINGEMENT WITH WATER DROPLETS - THE SMALLER THE DROPLET, THE MORE EFFICIENT THE SCRUBBER - WHEN COMBUSTIBLE DUST PARTICLES ARE CAPTURED INTO THE SCRUBBING LIQUID, THEY ARE NO LONGER IN CONTACT WITH OXYGEN, AND THE COMBUSTIBLE DUST HAZARD IS CONTROLLED
  5. 5. “iums” ALUMINUM HAFNIUM MAGNESIUM NIOBIUM TANTALIUM TITANIUM ZIRCONIUM As a general rule of thumb, wet scrubbers work best for light loading applications, such as grinding of large particles; very sticky dusts; dusts with high Kst values, typically of 150 Kst and above (Kst is defined as the rate of pressure rise and is a commonly recognized measure of a dust’s explosive power); and applications where dry collectors do not meet NFPA standards, especially involving metal dusts known as the “iums”
  6. 6. Dry media collectors offer a number of operational advantages over wet scrubbers. Efficiencies are much lower on scrubbers when dealing with 10 micron and smaller particles. They require clean water, with a concentration of dust particulate below five percent by volume, which can become challenging in higher dust loading applications. Wet systems also require more maintenance and run at much higher horsepower, especially when capturing particle sizes of <2 micron. When hazardous dusts are involved, disposing of wet materials may be costlier than disposing of dry materials due to regulations. Also, many metal dusts tend to react with water to produce hydrogen gas, requiring precautionary monitoring and control of sump tanks.
  7. 7. Sometimes the choice between a wet vs. dry media system is not clear-cut. Dust testing is the first step in the decision-making process to determine a dust’s physical, combustible and explosive properties. A hazard analysis will also be needed to identify the full range of combustible dust deflagration, fire and explosion hazards specific to the application. Methods for hazard analysis are spelled out in applicable NFPA standards.
  8. 8. VISIT OUR WEBSITE TO LEARN MORE! www.camfilapc.com
  9. 9. content provided by: JOHN DAUBER HANDTE PRODUCT MANAGER, AMERICAS CAMFIL AIR POLLUTION CONTROL

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