Pressure and Temperature Effects in Fluid-Particle Systems
Most investigations of fluidization parameters take place at ambi- ent temperature and pressure. Yet, nearly all processes operate at elevated temperature, and many at elevated pressure.
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Title Link Category Author Company Application Date
Emulsion Phase Density in Deep Fluidized Beds of Geldart Group A Material
Non-mechanical valves, especially the L-valves, have been used extensively in fluidized beds and circulating fluidized beds for solids recycling or to serve as a pressure seal. This paper presents a set of L-valve equations which relate the solids flow rate to the L-valve design, aeration rate, and pressure drop across the L-valve.
Measuring Particle Attrition in a Jet Cup
Particle attrition is usually a detriment to product quality and process cost. This paper discusses the development of a jet cup device that allows all of the sample particles to experience similar amounts of solids stresses.
Effect of Baffles on Gas Bypassing In a 0.9-M-Diameter Unit
Various types of internals have traditionally been used to improve fluidization quality. Some recent studies have shown that under some conditions there can be severe gas mal-distribution of gas in deep fluidized beds of Geldart group A materials.
Liquid Injection into Fluidized Beds
Snider, O’Rourke, and Zhao present a unified model for collisional exchange of mass, momentum, and energy between particles in gas/liquid/solid fluidized beds.
Effect of Baffles on Jet Streaming in Deep Fluidized Beds of Group A Particles
Commercial circulating fluidized bed (CFB) units require efficient operation of the riser and the solids return leg. The objective of this work was to study how horizontal baffles can be used to reduce or eliminate gas bypassing in deep beds.
Small Particles Cluster Formation in Fluidized Beds and its Effect on Entrainment
Three cases are presented on the entrainment of various materials from fluidized beds in which agglomerated clumps of particles affected the measured entrainment rates. Evidence suggests that fine particles in many materials may be clumping together – resulting in a reduced entrainment rate.
Understanding Streaming Flow in Deep Fluidized Beds
Gas streaming is the severe bypassing of gas that can occur in deep, bubbling fluidized beds. Gas bypassing consists of a large jet that precesses around the walls of the fluidized bed. Details of possible mechanisms and possible techniques for detecting gas-bypassing are presented in this report.
Jet Hydrodynamics Around Fluidized Bed Spargers
In this publication, typical commercial stripper operating problems are pointed out, and methods to diagnose the problems are identified.
Three Fundamental Granular Flow Experiments and CPFD Predictions
In this paper by Dale M. Snider, granular flow of three granular flow experiments is predicted by a CPFD numerical scheme in three dimension using the true particle size distribution.