Download or read book Hydrodynamic Characteristics at the Layer Inversion Point in Three phase Fluidized Beds with Binary Solids written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamic Study of Three Phase Semi Fluidized Bed with Irregular and Homogeneous Binary Mixtures written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidization refers to a process by which a fluid like state is imparted to granular solid particles by the passing of a fluid upwards through the bed of particles. A semi fluidized bed is characterized by a fluidized bed and a packed bed in a series within a single contacting vessel. Gas-liquid-solid semi fluidization is defined as an operation in which a bed of solid particles is suspended in gas and/or liquid upward flowing media due to the net gravitational force on the particles and the motion of the particles is restricted by a top restraint. Such an operation generates intimate contact between the gas, liquid and solid particles in these systems and provides substantial advantages for applications in physical, Chemical and biochemical processing involving gas, liquid and solid phases. The experiments were conducted using liquid as the continuous phase and gas as the discontinuous phase. In this work air, water and dolomite (2.31mm, and 1.7mm) are used as the gas, liquid and solid phases respectively. The experiments were carried out in a 100 mm ID of 2m height vertical Plexiglas column. Knowledge of minimum liquid semi fluidization velocity is essential for the successful operation of gas-liquid-solid semi fluidized beds. Bed pressure measurements have been made to predict the values of the minimum liquid semi fluidization velocity. In the present work, hydrodynamic characteristics viz., the pressure drop, bed expansion of a co-current gas-liquid-solid semi fluidized bed has been studied. These have done in order to develop a good understanding of each of the flow regime in gas-liquid and liquid-solid semi fluidization. The effect of static bed height, particle size, liquid velocity and gas velocity on hydrodynamics parameters like minimum semi fluidization velocity, pressure drop, expansion ratio have been investigated. Experimental study based on statistical design has been made to investigate the expansion ratio of semi fluidized bed. The experimental val.
Download or read book Hydrodynamic Characteristics of Three phase Fluidized Beds written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrodynamics of three-phase (gas-liquid-solid) fluidized beds has been studied in two columns of 7.62 and 15.2 cm in dia. The minimum gas and liquid velocities necessary to fluidize a bed were determined as a function of the particle size and density and the liquid viscosity; no effect of the initial bed height or column diameter was found. An electroconductivity technique was used to measure local concentrations of solid, liquid, and gas in the fluidized bed; these profiles were fitted using the error function. Overall solid holdup data were combined with over 1350 points from the literature to yield a dimensional correlation involving the physical parameters of the systems studied.
Download or read book Hydrodynamic Study of Three Phase Fluidized Beds written by Ravindra Gaikwad and published by LAP Lambert Academic Publishing. This book was released on 2014-01-01 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general purpose of the experimental investigations described here has to study the hydrodynamic properties of gas-liquid fluidized beds. Gas -liquid fluidization of or three-phase fluidization is a chemical engineering operation where all the three phases are brought into contact with each other. This contact is brought about by passing the gas and liquid trough the bed of solids. The solids are said to be in a fluidized state when they are suspended in the continuous phase.Hydrodynamic properties such as gas hold-up, liquid hold-up and bed porosity have been studied. These properties depend upon certain independent variables such as gas flow rates, liquid flow rate, particle size, static bed heights, gas density, liquid density, solid density, liquid surface tension, liquid viscosity, gas viscosity and particle shape. During the course of this experimental investigation only four of these parameters have been varied, viz, gas flow rates, liquid flow rates, static bed height and particle size.The result of these experimental investigations is discussed and correlations have also been developed for the hydrodynamics properties studied.
Download or read book Hydrodynamics Heat and Mass Transfer Characteristics of Three phase Inverse Fluidized Beds written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Hydrodynamic Behavior in an Inverse Three phase Fluidized Bed written by Nadim Fouad Yaacoub and published by . This book was released on 1988 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Hydrodynamic Behavior of an Inverse Liquid solid Circulating Fluidized Bed written by Amin Jaberi and published by . This book was released on 2014 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work the hydrodynamic behavior of an inverse liquid-solid circulating fluidized bed (ILSCFB) system was studied. In addition, the hydrodynamic characteristic of the inverse liquid-solid fluidization under the conventional fluidization regime was also studied. The system consists of a downer with an inner column diameter of 7.6 cm and a height of 5.4 meters, an upcomer (riser) with an inner column diameter of 20 cm, a separator, and feeding and returning pipes which connect the downer and the upcomer. Based on the axial hydrodynamic behavior of the ILSCFB, it was found that the axial solids holdup in the downer is uniform. Similar to the heavy-particle LSCFB, the circulating fluidization regime in the downer was separated into the two zones including the initial circulating fluidization zone and the fully developed circulating fluidized zone as a function of the total liquid velocity in the downer. The effects of the solids inventory and the counter current flow in the upcomer on the hydrodynamics of the downer were also studied. Afterwards, the radial distribution of particles was studied in the downer of the ILSCFB. Interestingly, the radial structure of the two-phase flow was completely different from the case of the heavy-particle LSCFB. It was found that the solids holdup was greater in the center than near the wall of the downer. Finally, the conventional (non-circulating) inverse liquid-solid fluidization was studied in a column with a large diameter for the first time. The minimum fluidization velocity was obtained experimentally and compared with the Richardson and Zaki model. It was concluded that the Richardson and Zaki model can predict the bed expansion in the case of the inverse liquid-solid fluidization when the terminal velocity was calculated by the model of free rising light particles.
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamic Characteristics of Liquid solid and Gas liquid solid Fluidized Beds written by Song-Hsing Chern and published by . This book was released on 1982 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrodynamics of Three phase Fluidized Beds written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrodynamics of three-phase (gas-liquid-solid) fluidized beds has been studied in two columns with inside diameters of 7.62 and 15.2 cm respectively. The minimum gas and liquid velocities necessary to fluidize various types of solids were determined and correlated as a function of the particle size and density and the liquid viscosity; no effect of the initial bed height or column diameter was found. Overall phase holdups, or volume fractions, determined from a homogeneous bed model were combined with similar literature data to yield correlations for the overall gas and solid phase holdups. The overall gas holdup increased as the gas velocity was increased, while the overall solid holdup was decreased by increased liquid velocity and was increased by increased particle diameter or solid/liquid density difference. An electroconductivity technique was developed for use in the three-phase fluidized beds which allowed each of the phase holdups to be determined at any point in the column. The technique has shown the existence of a transition region as the bed goes from a three-phase to a two-phase system. The holdup profiles were fitted using the error function, and the mean and standard deviation of the solid holdup profile, along with the gas and solid holdups in the regions where they were constant, were measured for each set of run conditions. Use of these five parameters, which were correlated with the physical pxrameters of the systems studied, permits each of the three phase holdup profiles to be predicted. This gives the reactor designer more information concerning phase distributions than was available previously; thus it will aid in the design of reactors where local conditions throughout the bed must be considered.
Download or read book Meubles et objets d art de bel ameublement written by and published by . This book was released on 1978 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Three phase Inverse Fluidized Bed written by Volen Rossenov Nikolov and published by . This book was released on 1998 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Chemical Engineering Abstracts written by and published by . This book was released on 1986 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of Fluidization to Food Processing written by Peter G. Smith and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidization is a technique that enables solid particles to take on some of the properties of a fluid. Despite being very widely used within the food processing industry, understanding of this important technique is often limited. Applications of Fluidization to Food Processing sets out the established theory of fluidization and relates this to food processing applications, particularly in: • Drying • Freezing • Mixing • Granulation • Fermentation This important and thorough book, written by Peter Smith, who has many years’ experience teaching and researching in food processing, is an essential tool and reference for food scientists and technologists, and engineers working within the food industry. Libraries, and research and development groups within all universities and research establishments where food science, food studies, food technology, physics and engineering are studied and taught should have copies of this useful book.
Download or read book Fluidization Engineering written by D. Kunii and published by Elsevier. This book was released on 2013-10-22 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidization Engineering, Second Edition, expands on its original scope to encompass these new areas and introduces reactor models specifically for these contacting regimes. Completely revised and updated, it is essentially a new book. Its aim is to distill from the thousands of studies those particular developments that are pertinent for the engineer concerned with predictive methods, for the designer, and for the user and potential user of fluidized beds. - Covers the recent advances in the field of fluidization. - Presents the studies of developments necessary to the engineers, designers, and users of fluidized beds.
Download or read book Survey of Heat Transfer to Near critical Fluids written by Robert C. Hendricks and published by . This book was released on 1970 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Process Intensification written by David Reay and published by Butterworth-Heinemann. This book was released on 2013-06-05 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Process Intensification: Engineering for Efficiency, Sustainability and Flexibility is the first book to provide a practical working guide to understanding process intensification (PI) and developing successful PI solutions and applications in chemical process, civil, environmental, energy, pharmaceutical, biological, and biochemical systems. Process intensification is a chemical and process design approach that leads to substantially smaller, cleaner, safer, and more energy efficient process technology. It improves process flexibility, product quality, speed to market and inherent safety, with a reduced environmental footprint. This book represents a valuable resource for engineers working with leading-edge process technologies, and those involved research and development of chemical, process, environmental, pharmaceutical, and bioscience systems. - No other reference covers both the technology and application of PI, addressing fundamentals, industry applications, and including a development and implementation guide - Covers hot and high growth topics, including emission prevention, sustainable design, and pinch analysis - World-class authors: Colin Ramshaw pioneered PI at ICI and is widely credited as the father of the technology
