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CAT NO: DIDACTICNLE-Export-210052
Fluidised Bed Formation- Engineering Lab Training Systems.
Technical Description
Bulk solids can be transformed from a
packed bed into a fluidised bed when liquids or gases pass through them.
The areas of application of fluidised beds include the drying of solids
and a wide variety of chemical processes.
Features two transparent
test tanks for fluidised bed formation in water and air. A diaphragm
pump delivers water from a storage tank into the bottom of the left side
test tank. The water flows upwards through a porous sintered-metal
plate. On the sintered-metal plate is a bulk solid. If the velocity of
the water is less than the so-called fluidisation velocity, the flow
merely passes through the packed bed. At higher velocities the bed is
loosened to such an extent that individual solid particles are suspended
by the fluid. If the velocity is increased further, particles are
carried out of the fluidised bed. A filter at the top of the test tank
holds these particles back. The water flows back into the storage tank.
The
right-side test tank is similar in construction to the left-side one. A
stream of air generated by a compressor flows through it.
Manometers
are mounted on both test tanks to measure the pressure loss. The flow
rates are adjusted by way of valves, and can be read from flow meters.
The test tanks are removable. This makes it easy to change the bulk
solid filling.
Glass-shot beads in a range of particle sizes are provided as the bulk solid filling.
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