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Air Movers for Dilute-Phase Pneumatic Conveying

By Gary Liu, DuPont |

Selecting the best air mover for a bulk-solids pneumatic-conveying application is a critical design decision. Provided here is information on three classes of air movers when dilute-phase pneumatic conveying is required In a typical bulk-solids pneumatic-conveying system, an air mover is used to generate the necessary air flowrate and pressure required to transport a solid material through a specific pipeline distance at a given rate. Designing a successful pneumatic conveying system depends on specifying the correct air mover, in terms of volumetric flowrate, pressure and motor size. A wide range of machines is potentially capable of meeting the requirements of the duty. However, not all air movers are suited to pneumatic conveying applications. Therefore, understanding the design and operating characteristics of various air movers is the key to successfully selecting the right machine. This article discusses the operating mechanisms and characteristics of three different types of air movers for dilute-phase pneumatic conveying: centrifugal fans and blowers; regenerative blowers; and positive-displacement (PD) blowers. Numerous air movers are available on the market for dilute-phase conveying applications. In many cases, two or…
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