7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 1/32

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying

Fluidization

Slide 1/33 Fluid Dynamics

Fundamentals, Operation Principlesand Equipment of Pneumatic

Conveying

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 2/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 3/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 4/32

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying

Fluidization

Slide 4/33 Fluid Dynamics

What Can Be Conveyed?

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 5/32

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying

Fluidization

Slide 5/33 Fluid Dynamics

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 6/32

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying

Fluidization

Slide 6/33 Fluid Dynamics

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 7/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 7/33 Fluid Dynamics

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 8/32

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 

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 9/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 9/33 Fluid Dynamics

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 10/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 10/33 Fluid Dynamics

Modes of Pneumatic Conveying

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 11/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 11/33 Fluid Dynamics

Flow patterns

in a horizontal conveying pipe

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 12/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 12/33 Fluid Dynamics

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 13/32

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 

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 14/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 15/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 16/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 17/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 18/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 19/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 20/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 20/33 Fluid Dynamics

Fundamentals Operation Principles and Equipment of Pneumatic Conveying

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 21/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 21/33 Fluid Dynamics

Typical system layout

Fundamentals Operation Principles and Equipment of Pneumatic Conveying

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 22/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 23/32

Fundamentals, Operation Principles and Equipment of Pneumatic ConveyingFluidization

Slide 23/33 Fluid Dynamics

Food Conveying System

Fundamentals Operation Principles and Equipment of Pneumatic Conveying

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 24/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 25/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 26/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 27/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 28/32

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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 29/32

, p p q p y gFluidization

Slide 29/33 Fluid Dynamics

..Many thanks for your attention..

Questions?

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 30/32

, 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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 31/32

, 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

7/18/2019 Pneumatic Conveying

http://slidepdf.com/reader/full/pneumatic-conveying-56976764ec0bb 32/32

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