Local and average heat transfer coefficients for heat transfer from internal tubes to a fluidized bed were investigated. A fluidized bed heat exchanger was compared to a baffled and an unbaffled exchanger in terms of power and heat transfer surface area requirements. The fluidized bed heat exchanger consisted of a...
Submicron particulate (mean size of 0.52 microns) was filtered
from air at substantially atmospheric temperature and pressure by
passing air up through a bed of fluidized glass shot in a two inch column.
Removal efficiency, defined as the percentage removal of
particulate from the air stream, was essentially constant during...
Two new methods for the determination of solids movement in a fluidized bed have been developed and evaluated in this work. The first method used a deflecting plexiglass rod with strain gages attached to the base which is immersed in the bed of fluidized solids. The probe will yield a...
Elutriation of silica sand particles from a 0.9 X 0.9 m cold
fluidized bed was studied. Data were collected for cases with and
without tubes. During experiments the position of the tube bundle
above the distributor plate and the superficial velocity were varied.
Runs were made at velocities of 0.9...
Gas mixing is studied in fluidized beds of large particles. The
bed is 0. 483 m by 0. 127 m (19 in. by 5 in. ) in cross section and has
transparent plexiglass panels on the front and back. A tube matrix
made of twenty-seven 50.8 mm (2 in.) diameter...
The literature cites several examples of investigations made
concerning the size of bubbles rising in small particle fluidized beds
at room temperature. In many practical applications, however, fluidized
beds require the use of large particles at very high temperatures.
Despite this fact, little information has been reported on bubble size...