Gas Dispersion Using an Up-pumping Maxflo W Impeller PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Gas Dispersion Using an Up-pumping Maxflo W Impeller PDF full book. Access full book title Gas Dispersion Using an Up-pumping Maxflo W Impeller by Muneeb Ur Rahman Shaik. Download full books in PDF and EPUB format.
Author: Muneeb Ur Rahman Shaik
Publisher:
ISBN:
Category : Gas-liquid interfaces
Languages : en
Pages : 49
Get Book Here
Book Description
Despite known advantages of up-pumping wide-blade axial-flow impellers for gas dispersion, little is known about the design guidelines of these impellers. In the present study, the gas dispersion capabilities of the up-pumping axial-flow Maxflo W impeller in low-viscosity liquids have been characterized to incorporate effects of scale and system geometry. Further, a comparison is made with the dispersion performance of an up-pumping pitch-blade turbine and a radial-flow CD-6. This comparison showed that the up-pumping Maxflo W impeller have dispersion speed, torque and power requirements relatively independent of the gas flow rate, providing the ability to handle varying process conditions.Testing at three scales (tank diameters of 0.29 m, 0.44 m and 0.60 m) indicates that the dispersion capabilities of the up-pumping Maxflo W can be described in terms of a scale-independent aeration number - Froude number relationship. Although a minimum impeller rotational speed is required to disperse low gas flows, the increase in dispersion speed is small with increasing gas flow rate. The effects of geometric parameters such as impeller to tank diameter ratio, sparger size and ungassed liquid height on flooded to dispersed conditions have been investigated. Unlike radial-flow gas dispersion impellers that are not strongly affected by some geometric parameters, the up-pumping Maxflo W dispersion performance is strongly dependent on system geometric parameters. Additionally, small impeller to tank diameter ratios of Maxflo W impellers have been found to perform poorly in gas dispersion operations because of their highly axial discharge flow.It was found that the up-pumping pitched-blade turbine exhibits time-dependent dispersion behavior that can permanently fail to disperse gas after appearing to be capable of dispersion for a reasonably long period of time. For this reason, collection of design data required extended and meticulous testing.
Author: Muneeb Ur Rahman Shaik
Publisher:
ISBN:
Category : Gas-liquid interfaces
Languages : en
Pages : 49
Get Book Here
Book Description
Despite known advantages of up-pumping wide-blade axial-flow impellers for gas dispersion, little is known about the design guidelines of these impellers. In the present study, the gas dispersion capabilities of the up-pumping axial-flow Maxflo W impeller in low-viscosity liquids have been characterized to incorporate effects of scale and system geometry. Further, a comparison is made with the dispersion performance of an up-pumping pitch-blade turbine and a radial-flow CD-6. This comparison showed that the up-pumping Maxflo W impeller have dispersion speed, torque and power requirements relatively independent of the gas flow rate, providing the ability to handle varying process conditions.Testing at three scales (tank diameters of 0.29 m, 0.44 m and 0.60 m) indicates that the dispersion capabilities of the up-pumping Maxflo W can be described in terms of a scale-independent aeration number - Froude number relationship. Although a minimum impeller rotational speed is required to disperse low gas flows, the increase in dispersion speed is small with increasing gas flow rate. The effects of geometric parameters such as impeller to tank diameter ratio, sparger size and ungassed liquid height on flooded to dispersed conditions have been investigated. Unlike radial-flow gas dispersion impellers that are not strongly affected by some geometric parameters, the up-pumping Maxflo W dispersion performance is strongly dependent on system geometric parameters. Additionally, small impeller to tank diameter ratios of Maxflo W impellers have been found to perform poorly in gas dispersion operations because of their highly axial discharge flow.It was found that the up-pumping pitched-blade turbine exhibits time-dependent dispersion behavior that can permanently fail to disperse gas after appearing to be capable of dispersion for a reasonably long period of time. For this reason, collection of design data required extended and meticulous testing.
Author: Thomas Martin
Publisher: Herbert Utz Verlag
ISBN: 9783896751041
Category : Bubbles
Languages : en
Pages : 262
Get Book Here
Book Description
Author: R. King
Publisher: Springer Science & Business Media
ISBN: 9401579733
Category : Science
Languages : en
Pages : 261
Get Book Here
Book Description
This volume is a selection of the material presented at the 7th European Mixing Congress. It is concerned exclusively with mixing in circular section vessels, using centrally mounted paddles or similar impellers. The contents are arranged under three classifications: Modelling of Mixing Processes, Mixing Operations and Experimental Techniques. The classifications result in the original material appearing in a different order to that of the Congress. This arrangement is intended to assist the reader in identifying the topic area by function or application, rather than by technology. In this book the section on Modelling contains papers which focus on the representation of the mixing process, whether by equation, scale-up criteria, or fluid dynamic simulation. Similarly, Mixing Operations are concerned with the application or function of the mixing process, such as mass transfer, heat transfer or mixing time. Experimental Techniques addresses the tools the researcher needs to use at the data gathering experimental stage. It collects together advances made in the various methods used by some of the foremost researchers, and indicates those areas still in need of additional instrumentation or methods of data reduction. The book is intended for researchers, designers and users of mixing equipment, and for those planning research and development programmes and who wish to keep up to date with advances in the basic technology and its applications.
Author: Gregory T. Benz
Publisher: John Wiley & Sons
ISBN: 111965050X
Category : Technology & Engineering
Languages : en
Pages : 448
Get Book Here
Book Description
This book is concise reference to designing mechanically sound agitation systems that will perform the process function efficiently and economically. Currently, all the books on bioreactor and fermenter design do not focus specifically on agitation. Sections cover agitator fundamentals, impeller systems, optimum power and air flow at peak mass transfer calculations, optimizing operation for minimum energy per batch, heat transfer surfaces and calculations, shaft seal considerations, mounting method, mechanical design, and vendor evaluation.
Author: Gregory T. Benz
Publisher: John Wiley & Sons
ISBN: 1119815517
Category : Technology & Engineering
Languages : en
Pages : 436
Get Book Here
Book Description
Agitator Design Technology for Biofuels and Renewable Chemicals Comprehensive guide to the design, installation, selection, and maintenance of agitators in the biofuels and renewable chemicals industries Agitator Design Technology for Biofuels and Renewable Chemicals is a single-source reference on all the major issues related to agitator design for biofuel, written with the intention of saving the reader time by avoiding the need to consult multiple references or sift through many pages of text to find what is needed for agitator design in specific industries. The work presents a brief introduction of basic principles and relevant theory, then goes on to cover the real-world applications of these principles, including economic evaluations of alternatives as well as supplier evaluation principles. To aid in quick and seamless reader comprehension, each chapter has the symbols used in that chapter listed and defined at the end. Overall, the work is written more as a how-to book than an academic treatise. The highly qualified author has included plenty of brevity throughout the pages with the hopes that readers go through the entire book as a single unit, rather than just skimming an occasional page or chapter as is common with other resources in similar fields. Sample topics covered in the work include: Avoiding common problems, such as using impeller diameters and speeds that would not result in even minimal solids suspension or liquid motion Choosing the right impellers for the job, understanding how power draw and pumping are calculated, and becoming familiar with biofuel/biomass agitator sizing guidelines The principles and limitations of scale-up and the most common non-Newtonian rheology applicable to biofuel applications Designing lab tests and scale-up cellulosic hydrolysis agitation, plus the uses and limitations of Computational Fluid Dynamics (CFD) As an easy-to-read and completely comprehensive resource to the subject, Agitator Design Technology for Biofuels and Renewable Chemicals is immensely valuable for professionals tasked with selecting agitation equipment or troubleshooting existing equipment, as well as those involved in planning activities and allocating resources related to project management.
Author: Barry Azzopardi
Publisher: John Wiley & Sons
ISBN: 1119971403
Category : Technology & Engineering
Languages : en
Pages : 317
Get Book Here
Book Description
The design of chemical reactors and their safety are as critical to the success of a chemical process as the actual chemistry taking place within the reactor. This book provides a comprehensive overview of the practical aspects of multiphase reactor design and operation with an emphasis on safety and clean technology. It considers not only standard operation conditions, but also the problems of runaway reaction conditions and protection against ensuing over-pressure. Hydrodynamics of Multiphase Reactors addresses both practical and theoretical aspects of this topic. Initial chapters discuss various different types of gas/liquid reactors from a practical viewpoint, and later chapters focus on the modelling of multiphase systems and computational methods for reactor design and problem solving. The material is written by experts in their specific fields and will include chapters on the following topics: Multiphase flow, Bubble columns, Sparged stirred vessels, Macroscale modelling, Microscale modelling, Runaway conditions, Behaviour of vessel contents, Choked flow, Measurement techniques.
Author: W Roy Penney
Publisher: Elsevier
ISBN: 0128189762
Category : Technology & Engineering
Languages : en
Pages : 470
Get Book Here
Book Description
Computer-Aided Design of Fluid Mixing Equipment: A Guide and Tool for Practicing Engineers helps practicing design and operations engineers in solving their agitation and mixing problems. The book provides the practicing engineer with the tools necessary to evaluate the performance of existing agitation and mixing equipment, along with tactics on how to design new equipment using computerized rating and design methods. The most appropriate design techniques are also included in computer programs for solving mixing problems for the practicing engineer. Excel solutions are available through the WEB for 40 example problems in the book. WEB based, general purpose CalcEdge design programs are also available; the TK6 source codes are also available. Provides the practicing engineer with the tools necessary to evaluate the performance of existing equipment and to design new equipment using computerized rating and design methods Explains the principles required to understand and use recommended design methods Implements design methods that are readily available and easy-to-use Presents sufficient worked examples–using provided canned programs–to guide the user in analyzing and designing mixing equipment
Author: Sunggyu Lee
Publisher: Taylor & Francis US
ISBN: 9780824755577
Category : Science
Languages : en
Pages : 768
Get Book Here
Book Description
Supplying nearly 350 expertly-written articles on technologies that can maximize and enhance the research and production phases of current and emerging chemical manufacturing practices and techniques, this second edition provides gold standard articles on the methods, practices, products, and standards recently influencing the chemical industries. New material includes: design of key unit operations involved with chemical processes; design, unit operation, and integration of reactors and separation systems; process system peripherals such as pumps, valves, and controllers; analytical techniques and equipment; current industry practices; and pilot plant design and scale-up criteria.
Author: Sunggyu Lee
Publisher: CRC Press
ISBN: 1351237683
Category : Science
Languages : en
Pages : 3338
Get Book Here
Book Description
This second edition Encyclopedia supplies nearly 350 gold standard articles on the methods, practices, products, and standards influencing the chemical industries. It offers expertly written articles on technologies at the forefront of the field to maximize and enhance the research and production phases of current and emerging chemical manufacturing practices and techniques. This collecting of information is of vital interest to chemical, polymer, electrical, mechanical, and civil engineers, as well as chemists and chemical researchers. A complete reconceptualization of the classic reference series the Encyclopedia of Chemical Processing and Design, whose first volume published in 1976, this resource offers extensive A-Z treatment of the subject in five simultaneously published volumes, with comprehensive indexing of all five volumes in the back matter of each tome. It includes material on the design of key unit operations involved with chemical processes; the design, unit operation, and integration of reactors and separation systems; process system peripherals such as pumps, valves, and controllers; analytical techniques and equipment; and pilot plant design and scale-up criteria. This reference contains well-researched sections on automation, equipment, design and simulation, reliability and maintenance, separations technologies, and energy and environmental issues. Authoritative contributions cover chemical processing equipment, engineered systems, and laboratory apparatus currently utilized in the field. It also presents expert overviews on key engineering science topics in property predictions, measurements and analysis, novel materials and devices, and emerging chemical fields. ALSO AVAILABLE ONLINE This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for both researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail)
[email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail)
[email protected]
Author: A. Kayode Coker
Publisher: Elsevier
ISBN: 0443301158
Category : Technology & Engineering
Languages : en
Pages : 978
Get Book Here
Book Description
Ludwig's Applied Process Design for Chemical and Petrochemical Plants Incorporating Process Safety Incidents is ever evolving starting with the first edition some 60 years ago. The volumes in this fifth edition provide improved techniques and fundamental design methodologies to guide the practicing engineer in designing process equipment and applying chemical processes to the properly detailed hardware. As indicative of the new title, process safety incidents are incorporated in many of the chapters, reviewing the root causes, and how these could be mitigated in future. Like its predecessor, this new edition continues to present updated information for achieving optimum operational and process conditions and to avoid problems caused by inadequate sizing and lack of internally detailed hardware. The volumes provide both fundamental theories where applicable and direct application of these theories to applied equations essential in the design effort. This approach in presenting design information is essential for troubleshooting process equipment and in executing system performance analysis. Volume 1B continues to cover mixing of liquids, process safety and pressure[1]relieving devices, metallurgy and corrosion, and process optimization. It builds upon Ernest E. Ludwig's classic text to further enhance its use as a chemical engineering process design manual of methods and proven fundamentals. This new edition includes new content on three-phase separation, mixing of liquids, ejectors, and mechanical vacuum systems, process safety and pressure-relieving devices, metallurgy and corrosion, and optimization of chemical process/blending. Some chapters review pressure-relieving devices and provide case studies for process safety incidents, which are well illustrated from US Chemical Safety Hazard Investigation Board (www.csb.gov). Finally, this book contains a glossary of Petroleum and Petrochemical Terminologies and Physical and Chemical Characteristics of Major Hydrocarbons.? Provides improved design manual for methods and proven fundamentals of process design with related data and charts? Covers complete range of basic day-to-day petrochemical operation topics? Extensively revised with new material added on three-phase separation, metallurgy, and corrosion? Process safety management/HAZOP and hazard analyses, and optimization of chemical process/blending? Presents many examples using Honeywell UniSim Design software, developed and executable computer programs, and Excel spreadsheet programs? Includes case studies of process safety incidents, guidance for troubleshooting, and checklists? Includes Software of Conversion Table and 30+ process data sheets in excel format
