- Civil Lab Mechanical Lab Engineering Lab Equipments
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CAT NO: DIDACTICNLE-Export-210053
Pneumatic Transport- Engineering Lab Training Systems.
Technical Description
Pneumatic conveyors can be used to transport dispersed solids over great distances in pipelines.
The
solid is transported out of a feed tank via a vibrating trough into an
airflow. An interchangeable injector disperses the solid in the airflow.
The airflow transports the solid upwards in the tube. The transport
terminates in a collector tank.
Depending on the velocity and solid
content of the airflow, different transport states may occur. At high
velocities, the solid is dispersed evenly across the cross-section of
the tube (dilute phase transport). If the velocity is reduced, strands
and balls form on the wall of the tube which then slide down owing to
their higher settling velocity. The strands and balls disintegrate again
in the airflow and reform. Reducing the velocity to below the settling
velocity of the individual particles ultimately results in plug
transport. The different transport states can be observed through the
transparent tube.
To identify the pressure loss and the flow
velocity, measuring points are provided at all relevant positions. The
velocity of the airflow is adjusted by a pressure regulator. The solid
mass flow can be adjusted by way of the throw of the vibrating trough on
a potentiometer. The compressed air can be provided from the laboratory
supply or by the supply unit .
Peas or plastic granulate
are recommended for use as the solid. The well-structured instructional
material sets out the fundamentals and provides a step-by-step guide
through the experiments.
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