Unit Operations of Particulate Solids : Theory and Practice book cover
1st Edition

Unit Operations of Particulate Solids
Theory and Practice

ISBN 9781439849071
Published August 4, 2011 by CRC Press
492 Pages 175 B/W Illustrations

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Book Description

Suitable for practicing engineers and engineers in training, Unit Operations of Particulate Solids: Theory and Practice presents the unit operations in chemical engineering that involve the handling and processing of particulate solids.

The first part of the book analyzes primary and secondary properties of particles and particulate systems, focusing on their characterization and the effects on selection and design of silos and conveyors. Covering the main industrial operations of dry solids processing, the second part offers insight into the operation principles of the most important technologies that handle dry solids in bulk. With an emphasis on two-phase and multiphase flow, the final part describes all of the relevant systems in industrial processes that combine two different components of the state of matter as well as technologies for separating phases by purely mechanical means.

Through clear explanations of theoretical principles and practical laboratory exercises, this book provides an understanding of the behavior of powders and pulverized systems. It also helps readers develop skills for operating, optimizing, and innovating particle processing technologies and machinery in order to carry out industrial operations, such as centrifugation, filtration, and membrane separations.

Table of Contents


Definitions of unit operations
Powder and particle technology
The solid state: main distinctive properties

Bulk Solids: Properties and Characterization
Introductory aspects
Classification of powders
Failure properties
Laboratory exercise: determination of some failure properties of powders
Particle size analysis
Laboratory exercise: particle size analysis by different methods

Storage and Conveying of Bulk Solids
Introduction: storage alternatives
Outdoors storage
Confined storage
Laboratory exercise: evaluation of wall loads in silos
Bulk solids conveying
Laboratory exercise: pneumatic conveying characteristics of different granules

Size Reduction
Fundamental principles of comminution
Energy requirements in comminution
Size reduction equipment
Criteria for selecting size reduction processes
Laboratory exercise: determination of reduction relations using a hammer mill

Size Enlargement
Introduction: agglomeration processes
Aggregation fundamentals: strength of agglomerates
Agglomeration methods
Selection criteria for agglomeration methods
Design aspects of agglomeration processes
Laboratory exercise: comparing methods for tumbling agglomeration of powders

Blending mechanisms
Statistical approach of mixing processes
Mixing equipment
Design and selection factors
Laboratory exercise: determination of blending indices for different tumbling mixers

Theoretical fundamentals
Fluidized regimes
Applications of fluidization
Laboratory exercise: fluidized-bed coating of food particulates

Introductory Aspects

Different mixtures relevant in industry
Classification of separation techniques
Specific techniques for granular materials

Solid Mixtures
Electromagnetic separation
Electrostatic separation
Laboratory exercise: efficiency of separation on single-stage screening

Solid–Fluid Systems
Introduction: simultaneous flow of fluids and solids
Separation efficiency
Solid–gas separations
Solid–liquid separation techniques

Appendix 1: International (SI) System of Units
Appendix 2: Density and Viscosity of Water at Different Temperatures and 101.325 kPa
Appendix 3: Density and Viscosity of Air at Different Temperatures and 101.325 kPa
Appendix 4: Dimensional Analysis
Appendix 5: Standard Screen Scales
Appendix 6: Guidelines for the Preparation of Laboratory Reports
Appendix 7: Notation


References appear at the end of each chapter.

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Enrique Ortega-Rivas is a professor at the Autonomous University of Chihuahua. He is a member of the editorial boards of Food and Bioprocess Technology: An International Journal, Food Engineering Reviews, and The Open Food Science Journal. A National Researcher of Mexico, Dr. Ortega-Rivas was a Fulbright scholar and has held positions at Food Science Australia, Monash University, and Washington State University. His research interests include food engineering, particle technology, and solid–fluid separation techniques.