Pneumatic Conveying Keeps Moving Ahead

Technical developments enhance performance and economics.

By Seán Ottewell, Editor at Large

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The accuracy of the now-automated system's loading, weighing and mixing operations has improved overall product quality and repeatability. In addition, using bulk bags in place of 25-kg sacks of PVC has reduced the amount of floor space needed for materials storage.

Flexibility is another advantage. A single conveyor can handle powders with a wide range of bulk densities, as well as flakes, pellets, capsules, tablets and other friable materials. Because the Pneumati-con system fully evacuates the vessel being discharged and the conveyor line itself, cross-contamination of multi-ingredient systems is minimized. The system also boasts easy-to-maintain filter receivers and rotary airlock valves.

PRESSURE BALANCE
One of the secrets of a successful and highly efficient pneumatic conveying system, whether a high-pressure dense-phase system or a low-pressure dilute-phase, is achieving an optimum pressure balance, notes Dynamic Air, St. Paul, Minn.

Many systems operate in an unstable or unbalanced pressure condition, says the company. This means the conveying system can be using either too much or not enough compressed air, both of which are undesirable.

To effectively counterbalance all the friction factors normally inherent in a pneumatic conveying system, Dynamic Air has developed DC-5 Air Saver technology, which accurately controls and pressure balances the pneumatic conveying system. It achieves the proper pressure balance by automatically sensing system conditions and reacting instantaneously and accurately without overcompensation. So material is conveyed through the line in a smooth, controlled manner and at the desired velocity, to optimize the conveying process for higher performance and reliability.

DC-5 Air Saver cuts energy consumption, improves system reliability, allows highly abrasive materials to be transported, reduces dust handling requirements, and decreases the dynamic loading experienced at pipe bends by controlling the conveying velocity, says the company.


 
Seán Ottewell Editor at Large. You can e-mail him at sottewell@putman.net.

 

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