Pneumatic Conveying

March 26, 2018 | Author: haseeb | Category: Fluidization, Fluid Dynamics, Pneumatics, Pressure, Soft Matter
Share Embed Donate


Short Description

Descripción: Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Flow patterns of Pneumatic Conveyi...

Description

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying

Slide 1/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Contents 1. Introduction 2. Classification of Pneumatic Conveying Systems 3. State Diagram

4. Equipments 5. Summary 6. References

Slide 2/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

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 Slide 3/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

What Can Be Conveyed?

Slide 4/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Slide 5/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Slide 6/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Slide 7/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

What Constitutes a Pneumatic Conveying System? • • • •

Slide 8/33

The Prime Mover Feeding, Mixing and Acceleration Zone The Conveying Zone Gas–Solids Separation Zone

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Slide 9/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Modes of Pneumatic Conveying

Slide 10/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Flow patterns in a horizontal conveying pipe

Slide 11/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Slide 12/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Basic Pneumatic Conveying Systems • Positive Pressure System • Negative Pressure Systems • Combined Negative–Positive Pressure Systems • Closed Loop System

Slide 13/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Positive pressure system

Slide 14/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Negative pressure systems

Slide 15/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Conveying negative–positive pressure systems

Slide 16/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Closed loop system

Slide 17/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Classification by Solid Feeder Type • Controlled feed systems • Non-controlled feed system

Slide 18/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Operation of a Pneumatic Conveying System • State diagram for horizontal conveying

Slide 19/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Slide 20/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Typical system layout

Slide 21/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Slide 22/33

http://www.process-systems.com.au/Pss18.html

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Food Conveying System

Slide 23/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Loading Unloading by Pneumatic Conveying

Slide 24/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Companies in Pneumatic Conveying •Govoni Sim Bianca Impianti (Italy) •Coperion Waeschle (Germany) •Zeppelin ZSA (Germany) •Dynamic Air (USA) •Telschig •Mecawber Engineering Systems India

Slide 25/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Advantages

Disadvantages



Dust-free transportationFlow types



High power consumption



Flexibility in routingFlow Problems



Wear and abrasion of equipment



Distribution to many different areas



Incorrect design can result in



Low maintenance and low manpower costs



Multiple use



Security



Ease of automation and control

Slide 26/33

particle degradation •

Limited distance

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Summary • Dilute phase systems constitute the most widely used of all pneumatic conveying systems • For effective dilute phase operation velocity should be slightly greater than saltation velocity. • To increase solid feed rate, it is necessary to increase the conveying velocity.

Slide 27/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

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.processsystems.com.au/Pss18.html • http://www.zeppelin-industry.de

Slide 28/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

..Many thanks for your attention..

Questions?

Slide 29/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

..Additional figures for the discussion.. Flow phases for fine particle suspensions: (a) fully suspended, stable; (b) surging, unstable; (c) saltation point– stationary bed, stable; (d) moving bed, very unstable; (e) stationary bed, stable

Slide 30/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Minimum safe air velocity in vertical horizontal lines for materials with different bulk densities and sizes Slide 31/33

Fluid Dynamics

Fundamentals, Operation Principles and Equipment of Pneumatic Conveying Fluidization

Comparison of velocities in pressure and vacuum systems for materials with different bulk densities

Slide 32/33

Fluid Dynamics

View more...

Comments

Copyright ©2017 KUPDF Inc.
SUPPORT KUPDF