Second, expanded edition published in 2007:
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Gas Cyclones and Swirl Tubes
-Principles, Design and Operation
2nd Edition
by
A.C. Hoffmann and
L.E. Stein
Springer-Verlag, Berlin, Heidelberg, New York
ISBN 978-3-540-74694-2
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Typeset in LaTeX
Drawings in Intaglio
More than 100 new pages in this edition contain:
(for description of the first edition, see below)
- New section on the history of cyclones.
- Updated and expanded chapter on CFD simulation of cyclones.
- New material on: the need for "start-of-run" performance measurements, the purpose of "tracer" measurements, renewed emphasis on need to examine the "underflow" when problems arise, and expanded discussion and illustration of hopper venting options.
- Expanded section on cyclone erosion with a new subsection on erosion of the outer wall of the vortex finder, in light of new CFD results.
- A new section discussing enhancements to cyclones, including wetted wall cyclones, dust collection with sprays and electrostatically enhanced cyclones.
- New sections on reentrainment and on wall film flow.
- Improved introduction to foams.
- Expanded section on vortex finder geometries with new subsections included.
- Substantially expanded section on design of inlet vanes.
- New material on the effect of rectifying vanes for pressure recovery and new material on the effect of vortex finder length on performance.
- A new section on the design of cyclone rooves, with an appendix on the construction of a vane "cut-out pattern".
- expanded discussion on problems associated with muticyclones.
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Gas Cyclones and Swirl Tubes
-Principles, Design and Operation
by
A.C. Hoffmann and
L.E. Stein
Springer-Verlag, Berlin, Heidelberg, New York
ISBN 3-540-43326-0
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Comprehensive Introduction to Gas Cyclone Technology
The subject of this book is centrifugal gas cleaning devices, namely cyclones
used as gas-solid separators for de-dusting and as gas-liquid separators for
de-misting. The optimization of cyclone performance for any given task is
an often-sought goal but is seldom achieved in practice. Understanding
cyclone performance as a function of cyclone size, geometry, feed properties,
feed flow rates and the system of which it is a part, is essential if one
wishes to successfully design, operate, troubleshoot or predict cyclone performance.
The information presented in this book will help to develop this understanding.
More than 300 pages cover:
- particle characterization, motion, size distribution, sampling
- swirl flow and flow patterns
- important cyclone separation and pressure drop models
- static and dynamic pressure
- computational fluid dynamics
- vapour-liquid (demisting) and foam-breaking cyclones
- swirl-tube type cyclones
- wall roughness and solids loading effects
- model predictions and comparison with experiments
- dimensional analysis and scaling rules
- sampling and performance measurement
- in-leakage (up-flow) effects and hopper crossflow
- dipleg ‘backup’
- hopper venting
- forces acting on a flapper valve
- erosion and erosion protection methods
- particle settling in conveying lines
- high vacuum operation
- estimating feed drop sizes distribution
- non-uniform inlet flow distribution
- inlet, overflow and underflow geometries and configurations including inlet vane design
- cyclone length and the ‘natural’ vortex length
- parallel and series arrangements and multiclones
Full table of contents
Brief list of errors in first print
About the Authors
Louis E. Stein graduated with a Ph.D. in Chemical Engineering from the Univer-sity
of Houston in 1974. After graduating he worked as a post-doctoral research
fellow at the University of Utah, as a NASA Engineering Aide, and as a process
engineer at the Sinclair Refinery, Pasadena Texas. During the period 1970-74, he
held the post of Chemical Engineering Instructor at the University of Houston.
After an interval as Research Engineer at Envirotech, Salt Lake City, he joined
Shell in 1975 and, after several promotions, and numerous company awards, retired
in 1999 as a Senior Staff Process Engineer. He remains active as a Separations
and Fluid Flow Consultant to industry and as Fluid Mechanics Lead Instructor
for Shell.
Dr Stein has four patents to his name, he has held the Presidency of the South
Texas Chapter of the International Filtration Society. He is married to Doris and
has 3 children and 2 grandchildren.
Alex C. Hoffmann is of Danish nationality. He graduated with a Ph.D. from University
College London in 1983 in high pressure fluidization. During his studies he
worked one year for UOP oil products in Chicago. He worked for three years as a
post-doctoral research fellow at Surrey University, stationed at Separation Processes
Services at Harwell, acting as Research Engineer and Industrial Consultant in
cyclone technology and gas cleaning. In 1987 he moved to the University of Groningen,
as a Lecturer and, later, Senior Lecturer. In 2001 he started as Professor at
the Programme for Process Technology at the Department of Physics at the University
of Bergen.
Professor Hoffmann has carried out a number of research projects in collabora-tion
with processing industry, mainly the oil and gas industry, specializing in particle
and multiphase technology. He is the author of more than 70 scientific articles
and has one patent to his name. He is married to Gloria and has two children.
Ordering
The book was released in 2002, in Europe at the end of May and in the USA in July. It is available in all major bookstores carrying scientific/technical books.
Translation to Chinese
translated by
W. Peng and
Z. Ji
Chemical Industry Press
ISBN 7-5025-5871-3
A complete translation to Chinese under license from Springer Verlag.
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