PNEUMATIC CONVEYING

OVERVIEW TRAINING PNEUMATIC CONVEYING

In this course, a review of gas/solids flow fundamentals is presented, including common pneumatic conveying problems, modes of transport in a pipeline, and how scale-model tests can be used to effectively design or evaluate systems that are operating poorly. Conveying line solids feeders are reviewed, as well as a discussion of proven pipeline layout rules and elbow/bend selection criteria.

One of the most important material-handling techniques in the chemical industry , cement Factory, Fertilizer Factories, Flour Mill  are the movement of material suspended in a stream of air over horizontal and vertical distances ranging from a few to several hundred feet. Materials ranging from fine powders through 6.35-mm, (d-in) pellets and bulk densities of 16 to more than 3200 kg/m3  (1 to more than 200 lb/ft3) can be handled.

OBJECTIVES TRAINING PNEUMATIC CONVEYING

  • Understand the advantages of pneumatic conveying systems over mechanical conveying
  • Understand the characteristics, limitations and fundamental design differences of dilute phase, dense phase and air activated gravity conveying
  • Understand the design approach and typical specifications of positive pressure, vacuum and combination pull-push dilute phase conveying systems
  • Understand the factors influencing the performance of pneumatic conveying systems and learn how conveying rates are affected by distances
  • Understand the terms “saltation” and “choking” as applicable to pneumatic systems
  • Learn by example – the methodology for selection of prime mover for a dilute phase pneumatic conveying systems
  • Gain understanding of pneumatic conveying system components such as fans, airlocks, separators, piping and filters
  • Learn how to estimate pressure drop in dilute phase conveying system

COURSE CONTENTS TRAINING PNEUMATIC CONVEYING

  • Flow patterns in bins and hoppers; bulk solids flow testing
  • Flow properties and hopper design/troubleshooting
  • Bulk solid feeders – screws, belts, rotary valves
  • Fine powder handling phenomena
  • Review of flow properties test report; silo design example
  • Common segregation mechanisms for powders and solids
  • Flow aid devices; transfer chute design
  • Introduction, modes of conveying; types of systems
  • Fundamentals of gas/solids flow; pressure loss calculations
  • Component selection and system design
  • Dense phase conveying; system troubleshooting
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