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Products  |  Fluid Mechanics  |  Flow around Bodies  |  HM 136
HM 136 Flow through Packed Columns Show data sheet (pdf file) Print page
Technical Description

  Packed columns have a variety of uses in process engineering, waste water and air purification and in biotechnical systems. For example, in an adsorption column the two substances can be brought into close contact using the packing. When used as a packed bed reactor, the packing carries the catalyst necessary for the reaction. Packing is available in the widest variety of shapes and materials.
  Observing the desired flow conditions is vital for proper functioning. Wetting, contact time and flow resistance play a key role. These packed column properties can be studied with the HM 136 trainer, and important phenomena such as the wall effect or the flooding point can be demonstrated.
  The central element of the trainer is the transparent packed column. The pressures in the top, middle and bottom of the column are measured, so that the pressure losses in the packed bed can be determined. The column can be operated with air or water. When operating with water, the direction of flow can be changed, so that even a fully flooded column can be studied, such as in a packed bed reactor. Operating the column with air and water in counterflow simulates the application as an absorption column. The packed bed is interchangeable, so that a laboratory's own packing can also be tried out.
  The experimental unit has its own air and water supply. The closed water circuit consists of storage tank, pump, flow meter and control valve. The air supply includes a compressor with flow meter and control valve.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.


Learning Objectives / Experiments
- function of a packed column
- record pressure loss characteristic curve
- compare operating modes
  * with water
  * with air
  * air/water counterflow mode
- demonstration of
  * wall effect
  * stream formation
  * stagnation point
  * flooding point
* Transparent model of a packed column1
* Flow through the column with water or air1
* Parallel flow or counterflow mode

[1] trainer for studying the flow in packing layers
[2] transparent DURAN glass packed column with interchangeable packed bed
[3] operation with water and/or air
[4] water-air operation in parallel flow or counterflow
[5] water direction of flow can be reversed
[6] closed water circuit with a pump and storage tank
[7] compressor for air supply
[8] measurement of volume flow and pressure loss


Technical Data

- max. flow rate: 17,5L/min
- max. head: 47m
- max. flow rate: 8m/h
- max. delivery pressure: 1bar
Packed column
- inner diameter: 80mm
- length: 2 x 500mm
 Storage tank: 35L

Measuring ranges
- flow rate (air): 0,5...5m/s
- flow rate (water): 50...600L/h
- differential pressure: 2x 0...600mbar


Dimensions and Weight
LxWxH: 1.350x800x1.900mm
Weight: approx. 200kg
Required for Operation
230V, 50Hz, 1 phase
Scope of Delivery
1 trainer
1 set of tools
1 packing package (Raschig rings)
1 set of instructional material
Order Details

070.13600  HM 136  Flow through Packed


© 2005 G.U.N.T. Gerätebau GmbH