AIR DRYERS: PROTECTING FUMIGANT QUALITY & EQUIPMENT

Posted on | by Justin Harrison

Keeping moisture out of TELONE™ bulk storage tanks is critical for protecting product integrity and preventing costly corrosion. TELONE™ is sensitive to moisture, and even small amounts of humid air can degrade product quality or cause your tank to slowly rust. When the product is pulled or the tank temperature drops, moist outside air is drawn in. Air dryers are an effective, low-maintenance solution to reduce that moisture load and protect your investment. This tip sheet explains what desiccant dryers do, how to maintain them, and when to consider upgrades like nitrogen padding for added protection.

WHY INSTALL AN AIR DRYER?

  • Removes moisture from incoming air during product withdrawal or thermal contraction
  • Reduces internal tank corrosion
  • Helps maintain product purity and stability

AIR ENTRY POINTS

When a product is withdrawn from a container, a vacuum effect is created within the storage space. This vacuum, combined with the cooling of the vapor space, generates a pressure difference that actively draws in ambient air from the surrounding environment. Such air ingress can introduce moisture and contaminants, which may compromise the integrity and quality of the product. It is crucial to effectively monitor and manage this process to maintain optimal storage conditions and ensure the product retains its characteristics and performance. Taking these proactive measures guarantees the highest standards of product preservation.

HOW AIR DRYERS WORK

Air is drawn into the system and initially passes through the air dryer before entering the storage tank. Within the dryer, a specialized desiccant material effectively adsorbs moisture from the incoming air. This process ensures that only dry air is released into the tank, thereby maintaining the quality of the air supply and protecting equipment from potential damage.

COMMON DESICCANTS

Air is drawn into the system and initially passes through the air dryer before entering the storage tank. Within the dryer, a specialized desiccant material effectively adsorbs moisture from the incoming air. This process ensures that only dry air is released into the tank, thereby maintaining the quality of the air supply and protecting equipment from potential damage.

WHEN TO REPLACE

  • If desiccant is brown or discolored, it may be chemically contaminated
  • Clean dryer housing during replacement, especially steel vessels
  • Replace damaged baskets and inspect PVRVs and humidity sensors

SERVICE LIFE FACTORS

Desiccant longevity depends on:

  • Tank throughput and air exchange volume.
  • Ambient humidity and daily temperature swings.
  • Proper dryer-to-tank match
  • Vacuum and pressure relief valve operation.
  • Use a moisture indicator for maintenance instead of relying solely on time intervals.

DRYER SIZING CONSIDERATIONS

  • Based on air volume, flow rate, and maintenance interval
  • Too small: moisture bypasses via secondary reliefs
  • Too large: higher cost and longer desiccant exposure time
  • Use a moisture indicator to trigger timely servicing

DISPOSAL

  • Follow local/state regulations
  • Uncontaminated desiccant is typically landfill-acceptable

SUPPLIERS

These companies can supply parts or new systems for your bulk requirements. Please contact your TELONE™ Specialist at Teleos for more information.

  • Protectoseal Co., Bensenville, IL | www.protectoseal.com | (630) 595-0800
  • W.A. Hammond Drierite Co., Xenia, OH | www.drierite.com | (937) 376-2927
  • Drytech Inc., Cookstown, NJ | www.drytechinc.com | (609) 758-1794

NOTE: Air dryers and vapor recovery systems are not appropriate substitutes for nitrogen padding during railcar unloading. It is essential to supplement nitrogen throughout the offloading process to ensure successful offloading.

Disclaimer:
The resources and information provided are meant purely for educational discussion, contains only general information about legal matters, and is not to be construed as advice. Please note that any information or resources provided are not legal or regulatory advice, and should not be treated as such. You must not rely on the information provided as an alternative to legal advice from your attorney or other professional services. Teleos Ag encourages readers to consult with counsel, and their local, county, and state regulators. We make no representations or warranties, express or implied, in relation to the information provided through our resources and blog posts. It is the readers responsibility to know the laws related to 1,3- D, appropriate PPE, Licensing, etc., in his or her City, County, State, and Country. TELONE™ and Teleos Ag Solutions™ are registered trademarks of Teleos Ag Solutions, Inc. TELONE™ by Teleos is a federally Restricted Use Pesticide. Always read and follow label directions.

Justin Harrison
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