Pneumatic Conveying
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Transcript of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
Fluidization
Slide 1/33 Fluid Dynamics
Fundamentals, Operation Principlesand Equipment of Pneumatic
Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
Fluidization
Slide 2/33 Fluid Dynamics
Fundamentals, Operation Principles and Equipment
of Pneumatic Conveying
1. Introduction
2. Classification of Pneumatic Conveying Systems
3. State Diagram
4. Equipments
5. Summary
6. References
Contents
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Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
Fluidization
Slide 3/33 Fluid Dynamics
Introduction
Moving objects with air
• Vacuum -Pulls
System pressure is less than atmospheric
•Vacuum Cleaner •Drinking Straw
• Pressure -Push
System pressure is greater than atmospheric•Leaf Blower
•Garden Hose
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Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
Fluidization
Slide 4/33 Fluid Dynamics
What Can Be Conveyed?
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Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
Fluidization
Slide 5/33 Fluid Dynamics
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Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
Fluidization
Slide 6/33 Fluid Dynamics
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 7/33 Fluid Dynamics
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 8/33 Fluid Dynamics
What Constitutes a Pneumatic
Conveying System?• The Prime Mover
• Feeding, Mixing and Acceleration Zone
• The Conveying Zone
• Gas – Solids Separation Zone
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 9/33 Fluid Dynamics
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 10/33 Fluid Dynamics
Modes of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 11/33 Fluid Dynamics
Flow patterns
in a horizontal conveying pipe
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 12/33 Fluid Dynamics
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 13/33 Fluid Dynamics
Basic Pneumatic Conveying Systems
• Positive Pressure System
• Negative Pressure Systems
• Combined Negative – Positive Pressure
Systems
•Closed Loop System
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 14/33 Fluid Dynamics
Positive pressure system
F d l O i P i i l d E i f P i C i
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 15/33 Fluid Dynamics
Negative pressure systems
F d t l O ti P i i l d E i t f P ti C i
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 16/33 Fluid Dynamics
Conveying negative – positive pressure
systems
F d t l O ti P i i l d E i t f P ti C i
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 17/33 Fluid Dynamics
Closed loop system
F d t l O ti P i i l d E i t f P ti C i
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 18/33 Fluid Dynamics
Classif ication by Solid Feeder
Type
• Controlled feed systems
• Non-controlled feed system
Fundamentals Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 19/33 Fluid Dynamics
Operation of a Pneumatic
Conveying System
• State diagram for horizontal conveying
Fundamentals Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 20/33 Fluid Dynamics
Fundamentals Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 21/33 Fluid Dynamics
Typical system layout
Fundamentals Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 22/33 Fluid Dynamicshttp://www.process-systems.com.au/Pss18.html
Fundamentals Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 23/33 Fluid Dynamics
Food Conveying System
Fundamentals Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 24/33 Fluid Dynamics
Loading Unloading by Pneumatic Conveying
Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 25/33 Fluid Dynamics
•Govoni Sim Bianca Impianti (Italy)
•Coperion Waeschle (Germany)
•
Zeppelin ZSA (Germany)•Dynamic Air (USA)
•Telschig
•Mecawber Engineering Systems India
Companies in Pneumatic Conveying
Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 26/33 Fluid Dynamics
• Dust-free transportationFlow types
• Flexibility in routingFlow Problems
• Distribution to many different areas
• Low maintenance and low
manpower costs
• Multiple use
• Security
• Ease of automation and control
• High power consumption
• Wear and abrasion of equipment
•Incorrect design can result in
particle degradation
• Limited distance
DisadvantagesAdvantages
Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
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Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization
Slide 27/33 Fluid Dynamics
Summary
• Dilute phase systems constitute the mostwidely used of all pneumatic conveying
systems
• For effective dilute phase operation velocity
should be slightly greater than saltationvelocity.
• To increase solid feed rate, it is necessary to
increase the conveying velocity.
Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
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u da e ta s, Ope at o c p es a d qu p e t o eu at c Co vey gFluidization
Slide 28/33 Fluid Dynamics
References
• G.E. Klinzing , F. Rizk , R. Marcus , L.S.
Leung, ‘Pneumatic Conveying
of Solids’, Third Edition, (2009), Springer,
Dordrecht Heidelberg New York
• http://www.process-
systems.com.au/Pss18.html
• http://www.zeppelin-industry.de
Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
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, p p q p y gFluidization
Slide 29/33 Fluid Dynamics
..Many thanks for your attention..
Questions?
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, p p q p y gFluidization
Slide 30/33 Fluid Dynamics
..Additional figures for the discussion..
Flow phases forfine particle
suspensions:
(a) fully suspended,
stable;
(b) surging, unstable;
(c) saltation point –
stationary
bed, stable; (d) moving
bed,
very unstable; (e)
stationary
bed, stable
Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
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, p p q p y gFluidization
Slide 31/33 Fluid Dynamics
Minimum safe air velocity in vertical horizontal lines for materials with
different bulk densities and sizes
Fundamentals, Operation Principles and Equipment of Pneumatic Conveying
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p p q p y gFluidization
Slid 32/33 Fl id D i
Comparison of velocities in pressure and vacuum systems
for materials with different bulk densities