TABLE OF CONTENTS Gas-fluidized beds are addressed in many heat-transfer books because they are a common reactor scheme for a wide range of applications where intimate gas-solid contact is required. Gas-fluidized beds are used for such diverse applications as coating, pharmaceutical production, coal combustion, and petroleum cracking. The extensive surface area of particles, coupled with the steady particle mixing induced by bubbles, ensures nearly isothermal operation and impressive convective heat-transfer coefficients.
This part is composed of a single chapter, by two U.S. academics, that presents two typical design problems, one in the bubbling regime and the other for a more dilute circulating fluidized bed. Both illustrate very common gas-solid contacting methods with quite different hydrodynamics, so each is described briefly.
Charles J. Coronella and Scott A. Cooper
Chemical and Metallurgical Engineering Dept.
University of Nevada
Reno, Nevada
Gas-fluidized beds are a common reactor scheme for a wide range of applications where intimate gas-solid contact is required, and are used for such diverse applications as coating, pharmaceutical production, coal combustion, and petroleum cracking. The extensive surface area of particles, coupled with the steady particle mixing induced by bubbles, ensures nearly isothermal operation and impressive convective heat-transfer coefficients.
In order to predict heat-transfer rates in fluidized beds, it is necessary to have a basic understanding of fluidization hydrodynamics, so a brief summary is given here. In the design of an actual reactor, the engineer is advised to consult additional publications, starting with the excellent text...
