Features:

• Pneumatic pressure-lifting of solids in a vertical tube  
• Transparent tubes and tanks to observe different transport states  
• Practical experiments on a laboratory scale  

Tesca Pneumatic Conveyors/Transport Apparatus 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 has to  be provided from the laboratory supply.  
Peas or plastic granulate are recommended for use as solid. 

Specifications:

1. Pneumatic pressure-lifting of solids in a vertical tube  
2. Feed of solid into airflow via vibrating trough with adjustable throw  
3. 4 interchangeable injectors to disperse the feed material into the airflow  
4.  Vertical tube made of glass
5. Collector and feed tanks made of transparent material (PMMA)  
6. Collector and feed tanks interconnected by tube with plug valve  
7. Precision pressure regulator to adjust input pressure and flow rate  
8. Measuring points for pressure loss, temperature, and flow velocity

Technical Specifications:
Vertical tube  
Height: 2m  
Diameter: 50mm  
Tanks  
Feed: 20L  
Collector: 40L  
Measuring ranges  
Velocity (vertical tube): 0…36m/s 
Differential pressure (vertical tube): 0…10kPa 
Pressure (inlet): 0…1bar 
Temperature: 0…60°C 

Experiments:

1. Learning the fundamental principle and method of operation of a pneumatic conveyor system  
2. Observation of different transport states dependent on solid content and air velocity 
3. Determination of the suspension velocity of the solid  
4. Determination of the solid content of the flow  
5. Pressure loss dependent on solid content and air velocity 

Requirements:
Mains Power 220 – 240V @ 50Hz, 1Ph