The specifically designed to enable the complex theoretical principles of adsorption processes to be explained clearly and comprehensibly by means of experimentation.

To regenerate the adsorbent, ambient air is drawn in by a second compressor. The air is heated and flows from above into the column. This desorption process can also be observed through the transparent column. The trainer enables simultaneous investigation of the adsorption and desorption processes. Once the capacity of the adsorbent in one column is exhausted, the humid air is fed through a second column with regenerated adsorbent to dry it.

A circuit system featuring a pump and a refrigeration system is provided to adjust the temperature of the water bath in the humidifier. The temperature and humidity of the air being dried are adjusted by software. The flow rates of the two air flows can be adjusted by valves.

By recording the relative humidities and temperatures at all relevant points, the two processes can be fully balanced. The measured values are recorded by software. The software permits the adsorption and desorption processes to be depicted in a h-ω; diagram and enables breakthrough curves to be plotted.

A compressor draws in ambient air. The air flows through the water bath of a humidifier and thereafter has a relative humidity of 100%. Before the air flows from below into the adsorption column, its relative humidity and temperature are set using a heater. The humid air flows through the adsorbent (silica gel), which is placed as a fixed bed inside a transparent column. The quantity of humidity contained in the air is adsorbed in the process. The adsorbent contains an indicator. The colour of this indicator shows the position of the mass transfer zone (MTZ). The air dried in this way exits the column and flows out into the open.

Specification:

Continuous adsorptive air drying

Adjustment of relative humidity and temperature of feed air by heater

Heater for temperature adjustment of the regenerative air

Humidification of the feed air by flowing through a water bath

Circular system with pump and refrigeration system to adjust the water bath temperature

2 columns for alternating charging and regeneration of the adsorbent

Observation of mass transfer zone by using transparent columns and adsorbent with indicator

2 compressors to deliver the feed air and regenerative air out of the ambient atmosphere

Adjustment of regenerative air and feed air flow rates by valves

Software with control functions and data acquisition via USB under Windows 8.1, 10.

Technical data

2 columns

Ø approx. 80mm

Height: approx. 800mm

Refrigeration system

Refrigeration capacity: 395W at temperature

Difference 10K / 250L

2 electric air heaters

2 compressors

Max. positive pressure: 1bar

Max. flow rate: 8m3/h

Humidifier pump

Max. flow rate: 600L/h

Max. head: 1,5m

Power output (feed air): 160W

Power output (regeneration): 2x 250W

Measuring ranges

Flow rate: 2x 0…10Nm3/h

Temperature: 3x 0…50°C; 1x 0…200°C, 1x -25…125°C (air)

Rel. humidity: 4x 0…100%

Temperature: 1x 0…50°C (water)

230V, 50Hz, 1 phase

230V, 60Hz, 1 phase; 230V, 60Hz, 3 phases

Dimensions and weight

LxWxH: 1390x750x1890mm

Weight: approx. 150kg.