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Pneumatic Conveying: Optimal System Design, Operation and Control

By Harald Wilms Zeppelin Systems GmbH Shrikant Dhodapkar The Dow Chemical Co. |

Numerous strategies and options for both dilute- and dense-phase conveying systems are presented here   Pneumatic conveying is a ubiquitous mode of conveying bulk solids in a wide range of industries, including chemicals, plastics, grain, food, agricultural, mining, power and cement. In recent years, the capacities, distances and variety of materials to be conveyed have increased, often approaching the design limitations of the available hardware. In addition, energy-efficiency considerations require designing pneumatic conveying systems closer to the theoretical limit. Meanwhile, the operational reliability and stability of dense-phase systems have been significantly enhanced through the application of sophisticated air-control systems. This article outlines some of the underlying concepts for optimal design and operation of both dilute- and dense-phase pneumatic conveying systems.   Introduction Figure 1.  The common modes of pneumatic conveying, and corresponding characteristic data for polymer pellets, are shown here. This figure illustrates the relationship between conveying mode, gas velocity and particle velocity   Pneumatic conveying systems have been used for more than a hundred years…
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