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Dilute-phase Pneumatic Conveying: Instrumentation and Conveying Velocity

By Amrit Agarwal,
Consulting Engineer |

Dilute-phase pneumatic conveying systems must be operated in a certain sequence and have sufficient instrumentation and operating controls to assure reliable operation and prevent problems. This article discusses two subjects that are important for successful dilute-phase conveying. Discussed below are design guidelines for instrumentation and controls that can prevent operating problems, such as pipeline plugging, downtime, equipment failure, high power consumption, product contamination and more. The article also provides a simple methodology for finding out if the presently used conveying velocity is too low or two high and for making the required changes in this velocity. The required instrumentation depends on the degree of automation that is necessary, and whether the system is to be controlled locally or remotely. When manual control of the conveying system is used, problems can arise, especially if the operators do not have a thorough understanding of the design and of the required operating method of the conveying system, or if they do not pay close attention to day-to-day operation of the system. For conveying systems — where even a single error can result in a large financial loss — a well-instrumented and automated…
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