Download or read book Fluidization behavior and liquid injection in three dimensional prismatic spouted beds written by Swantje Pietsch and published by Cuvillier Verlag. This book was released on 2019-01-15 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this PhD thesis, the flow stability in a laboratory three-dimensional prismatic spouted bed is investigated both experimentally and in CFD-DEM simulations. Liquid is injected in bottom-spray configuration with the aim of a homogeneous distribution of the coating suspension on the whole particle bed. The range of stable spouting is increased by the installation of two parallel draft plates. Nevertheless, the instable spouting regime is found to be advantageous for obtaining a homogeneous coating as the draft plates prevent the mixing in the depth of the apparatus. In addition to the investigations on laboratory scale, the residence time behavior in a continuous pilot scale spouted bed is characterized using a novel tracer method with magnetizable particles. The back-mixing in the apparatus is reduced by the insertion of separation plates with defined transfer geometries.
Download or read book Modeling and Flowsheet Simulation of Vibrated Fluidized Bed Dryers Band 18 written by Sören Ernst Lehmann and published by Cuvillier Verlag. This book was released on 2021-12-07 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidized bed dryers are the prime choice when it comes to drying of heat sensitive products, commonly processed in the pharmaceutical and food industry. As many products in these industries are fine and cohesive, mechanical vibration of the dryer is used to enable or improve fluidization. Thus, the goal of this thesis is the development of a fluidized bed drying model that accounts for the influence of mechanical vibration of the dryer, as well as its implementation in an open-source flowsheet simulation framework. Continuously operated fluidized bed dryers under steady-state conditions are the focus of this thesis. The aim during model development and implementation is the broadest possible application range of the model. A custom-built vibrated fluidized bed dryer is designed and constructed for comprehensive investigations of fluidized bed hydrodynamics and drying kinetics. Based on experimental investigations, a semi-empirical model for hydrodynamics of fine and cohesive powders is developed. The new model is combined with established models to allow for the flowsheet simulation of fluidized bed dryers for particles of all Geldart groups. Additionally, the influence of vibration is accounted for. Comprehensive validation experiments are performed for particles of different Geldart groups, different dryer geometries and a variety of process parameters, including mechanical vibration. Comparison of model predictions with experimental data attributes high accuracy of predicted particle and gas properties. Furthermore, sensitivity analyses are conducted to identify potential weaknesses in underlying model assumptions. Hereby, the validity of underlying assumptions is confirmed and potential optimization parameters for different applications are identified. The proposed model is unprecedented in terms of range of process parameters, variety of particle properties and dryer geometries, tested and found valid for.
Download or read book Strategy for spray coating of highly porous and light weighting particles using spouted bed technology written by Monika Goślińska and published by Cuvillier Verlag. This book was released on 2023-02-23 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis an in-depth experimental study of the spray coating of light weighting and mesoporous organic aerogels was carried out. The main goal of this study was to design a stable core-shell particle system with a uniform coating layer without changing the initial particle structure. Further, the applied coating layer provides many beneficial improvements and additional properties for the aerogel particles, like an enhanced mechanical stability or a protection against moisture during storage. To design the structured core-shell particles with unaffected porous structure and uniform coating layer, series of experiments was conducted. The coating process with beeswax and ethanol based shellac solutions was performed at two levels using acoustic levitation and spouted bed set ups. At single particle level the basic influences on particle structure were captured. During coating at multiple particle level, which was performed in spouted bed, the results were validated. The optimum coating process parameters were identified. A uniform and stable core-shell particle system was designed. No change of initial porous particle structure was observed.
Download or read book Spouted and Spout Fluid Beds written by Norman Epstein and published by Cambridge University Press. This book was released on 2010-12-23 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the pioneering text by Mathur and Epstein over 35 years ago, much of the work on this subject has been extended or superseded, producing an enormous body of scattered literature. This edited volume unifies the subject, pulling material together and underpinning it with fundamental theory to produce the only complete, up-to-date reference on all major areas of spouted bed research and practice. With contributions from internationally renowned research groups, this book guides the reader through new developments, insights and models. The hydrodynamic and reactor models of spouted and spout-fluid beds are examined, as well as such topics as particle segregation, heat and mass transfer, mixing and scale-up. Later chapters focus on drying, particle-coating and energy-related applications based on spouted and spout-fluid beds. This is a valuable resource for chemical and mechanical engineers in research and industry.
Download or read book Characterisation of Bulk Solids written by Don McGlinchey and published by John Wiley & Sons. This book was released on 2009-02-12 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handling of powders and bulk solids is a critical industrial technology across a broad spectrum of industries, from minerals processing to bulk and fine chemicals, and the food and pharmaceutical industries, yet is rarely found in the curricula of engineering or chemistry departments. With contributions from leading authors in their respective fields, Characterisation of Bulk Solids provides the reader with a sound understanding of the techniques, importance and application of particulate materials characterisation. It covers the fundamental characteristics of individual particles and bulk particulate materials, and includes discussion of a wide range of measurement techniques, and the use of material characteristics in design and industrial practice. The reader will then be in a better position to diagnose solids handling and processing problems in industry, and to deal with experts and equipment suppliers from an informed standpoint. Written for post-graduate engineers, chemical scientists and technologists at all stages of their industrial career, the book will also serve as an ideal primer in any of the specialist areas to inform further study.
Download or read book Modern Drying Technology Volume 1 written by Evangelos Tsotsas and published by John Wiley & Sons. This book was released on 2011-02-10 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: This five-volume handbook provides a comprehensive overview of all important aspects of modern drying technology, including only advanced results. In this first volume diverse model types for the drying of products and the design of drying processes (short-cut methods, homogenized, pore network, and continuous thermo-mechanical approaches) are treated, along with computational fluid dynamics, population balances, and process systems simulation tools. Emphasis is put on scale transitions.
Download or read book Cement Production Technology written by Anjan Kumar Chatterjee and published by CRC Press. This book was released on 2018-04-27 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is an outcome of the author’s active professional involvement in research, manufacture and consultancy in the field of cement chemistry and process engineering. This multidisciplinary title on cement production technology covers the entire process spectrum of cement production, starting from extraction and winning of natural raw materials to the finished products including the environmental impacts and research trends. The book has an overtone of practice supported by the back-up principles.
Download or read book Micro Macro Interactions written by Albrecht Bertram and published by Springer Science & Business Media. This book was released on 2008-10-23 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many materials or media in nature and technology possess a microstructure which determines their macroscopic behaviour. The knowledge of the relevant mechanisms is often more comprehensive on the micro than on the macro scale. On the other hand, not all information on the micro level is relevant for the understanding of this macro behaviour. Therefore, averaging and homogenization methods are needed to select only the specific information from the micro scale, which influences the macro scale. These methods also open the possibility to design or to influence microstructures with the objective to optimize their macro behaviour. This book presents the development of new methods in this interdisciplinary field of macro- micro-interactions of different engineering branches like mechanical and process engineering, applied mathematics, theoretical, and computational physics. In particular, solids with microstructures and particle systems are considered.
Download or read book Carbon Dioxide Mineralization and Utilization written by Pen-Chi Chiang and published by Springer. This book was released on 2017-03-04 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on an important technology for mineralizing and utilizing CO2 instead of releasing it into the atmosphere. CO2 mineralization and utilization demonstrated in the waste-to-resource supply chain can “reduce carbon dependency, promote resource and energy efficiency, and lessen environmental quality degradation,” thereby reducing environmental risks and increasing economic benefits towards Sustainable Development Goals (SDG). In this book, comprehensive information on CO2 mineralization and utilization via accelerated carbonation technology from theoretical and practical considerations was presented in 20 Chapters. It first introduces the concept of the carbon cycle from the thermodynamic point of view and then discusses principles and applications regarding environmental impact assessment of carbon capture, storage and utilization technologies. After that, it describes the theoretical and practical considerations for “Accelerated Carbonation (Mineralization)” including analytical methods, and systematically presents the carbonation mechanism and modeling (process chemistry, reaction kinetics and mass transfer) and system analysis (design and analysis of experiments, life cycle assessment and cost benefit analysis). It then provides physico-chemical properties of different types of feedstock for CO2 mineralization and then explores the valorization of carbonated products as green materials. Lastly, an integral approach for waste treatment and resource recovery is introduced, and the carbonation system is critically assessed and optimized based on engineering, environmental, and economic (3E) analysis. The book is a valuable resource for readers who take scientific and practical interests in the current and future Accelerated Carbonation Technology for CO2 Mineralization and Utilization.
Download or read book OpenFOAM written by J. Miguel Nóbrega and published by Springer. This book was released on 2019-01-24 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains selected papers of the 11th OpenFOAM® Workshop that was held in Guimarães, Portugal, June 26 - 30, 2016. The 11th OpenFOAM® Workshop had more than 140 technical/scientific presentations and 30 courses, and was attended by circa 300 individuals, representing 180 institutions and 30 countries, from all continents. The OpenFOAM® Workshop provided a forum for researchers, industrial users, software developers, consultants and academics working with OpenFOAM® technology. The central part of the Workshop was the two-day conference, where presentations and posters on industrial applications and academic research were shown. OpenFOAM® (Open Source Field Operation and Manipulation) is a free, open source computational toolbox that has a larger user base across most areas of engineering and science, from both commercial and academic organizations. As a technology, OpenFOAM® provides an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics and electromagnetics, among several others. Additionally, the OpenFOAM technology offers complete freedom to customize and extend its functionalities.
Download or read book Advanced Combustion and Aerothermal Technologies written by Nick Syred and published by Springer. This book was released on 2007-10-16 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here readers will find a summary of proceedings at a highly important NATO workshop. The ARW Advanced Combustion and Aerothermal Technologies: Environmental Protection and Pollution Reductions, was held in Kiev, May 2006. The workshop was co-directed by Profs. N. Syred and A.Khalatov, winners of the NATO Scientific Prize 2002, and was organized by the Institute of Thermophysics (Ukraine) and Cardiff University, UK. The primary workshop objective was to assess the existing knowledge on advanced combustion and aerothermal technologies providing reduced environmental impact.
Download or read book Coupled CFD DEM Modeling written by Hamid Reza Norouzi and published by John Wiley & Sons. This book was released on 2016-10-17 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the CFD-DEM method of modeling which combines both the Discrete Element Method and Computational Fluid Dynamics to simulate fluid-particle interactions. Deals with both theoretical and practical concepts of CFD-DEM, its numerical implementation accompanied by a hands-on numerical code in FORTRAN Gives examples of industrial applications
Download or read book Numerical Simulation for Next Generation Thermal Power Plants written by Falah Alobaid and published by Springer. This book was released on 2018-03-29 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides highly specialized researchers and practitioners with a major contribution to mathematical models’ developments for energy systems. First, dynamic process simulation models based on mixture flow and two-fluid models are developed for combined-cycle power plants, pulverised coal-fired power plants, concentrated solar power plant and municipal waste incineration. Operation data, obtained from different power stations, are used to investigate the capability of dynamic models to predict the behaviour of real processes and to analyse the influence of modeling assumptions on simulation results. Then, a computational fluid dynamics (CFD) simulation programme, so-called DEMEST, is developed. Here, the fluid-solid, particle-particle and particle-wall interactions are modeled by tracking all individual particles. To this purpose, the deterministic Euler-Lagrange/Discrete Element Method (DEM) is applied and further improved. An emphasis is given to the determination of inter-phase values, such as volumetric void fraction, momentum and heat transfers, using a new procedure known as the offset-method and to the particle-grid method allowing the refinement of the grid resolution independently from particle size. Model validation is described in detail. Moreover, thermochemical reaction models for solid fuel combustion are developed based on quasi-single-phase, two-fluid and Euler-Lagrange/MP-PIC models. Measurements obtained from actual power plants are used for validation and comparison of the developed numerical models.
Download or read book Dynamic Flowsheet Simulation of Solids Processes written by Stefan Heinrich and published by Springer Nature. This book was released on 2020-06-20 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest advances in flowsheet simulation of solids processes, focusing on the dynamic behaviour of systems with interconnected solids processing units, but also covering stationary simulation. The book includes the modelling of solids processing units, for example for comminution, sifting and particle formulation and also for reaction systems. Furthermore, it examines new approaches for the description of solids and their property distributions and for the mathematical treatment of flowsheets with multivariate population balances.
Download or read book Spouted Beds written by Kishan Mather and published by Elsevier. This book was released on 2012-12-02 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spouted Beds is a comprehensive 13-chapter book that covers the spouting phenomenon and the special features and applications of spouted beds. After briefly discussing the history and features of spouted bed compared to fluidized bed, the book deals with the fluid and solid dynamics of spouted beds. The book then gives a description of the internal geometrical structure of a stable bed, as well as the estimation of maximum spoutable bed depth. The subsequent chapters examine the attrition and heat and mass transfer in spouted beds, both between fluid and particles and within particles. The book further discusses theoretical aspects on using a spouting bed in carrying out gas phase chemical reaction. It also describes the application of spouted bed to a large variety of mechanical, thermal, diffusional, and chemical processes, whether on the bench, pilot, or commercial scale. This is followed by a discussion on the various process and equipment modifications to a standard spouted bed that have been devised to achieve specific ends. The final chapter outlines some practical hints for the benefit of the spouted bed designer and operator. This book is an ideal resource text to spouted bed designers, operators, and manufacturers.
Download or read book Granular Dynamics written by Aibing Yu and published by Springer. This book was released on 2018-03-15 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this handbook is to provide a comprehensive summary of the field of Particle Science and Technology which includes most updated research findings and their applications in different industries. It is hoped that the consolidated knowledge described by this handbook will inspire more innovative ideas to bring the field forward. The size of the particles may range from nanometer scale, as in pigments or aerosols, to that of mined or quarried materials. The handbook will cover the topics ranging from the formation and synthesis, packing and flow, and application of these particles. Each part is explored in great details in different sections and chapters, it is written by a pool of international well known scholars, as well as industrial experts. The handbook fully reflects the state of the art in Particle Science and Technology
Download or read book Handbook of Fluidization and Fluid Particle Systems written by Wen-Ching Yang and published by CRC Press. This book was released on 2003-03-19 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference details particle characterization, dynamics, manufacturing, handling, and processing for the employment of multiphase reactors, as well as procedures in reactor scale-up and design for applications in the chemical, mineral, petroleum, power, cement and pharmaceuticals industries. The authors discuss flow through fixed beds, elutriation and entrainment, gas distributor and plenum design in fluidized beds, effect of internal tubes and baffles, general approaches to reactor design, applications for gasifiers and combustors, dilute phase pneumatic conveying, and applications for chemical production and processing. This is a valuable guide for chemists and engineers to use in their day-to-day work.