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Fluidization Bed Flow Apparatus (SMT-FM-44)
Investigation of fluidised bed formation of solids in
air and water.
2 transparent test tanks to observe fluidised bed
formation in air/water.
1 manometer per tank to measure the pressure loss
through each test tank.
1 steel rule per tank to measure the change in
height of the fluidised beds.
Both test tanks removable for filling.
Storage tank with diaphragm pump for water
Diaphragm compressor with compressed air
accumulator for compressed air supply.
Bulk solids can be transformed from a fixed 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. SMT-FM-44 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 fixed 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.