High-purity nitrogen is essential for ammonia synthesis. CE 545 uses the principle of pressure swing adsorption (PSA) to produce nitrogen from compressed air with a purity of up to 99,9%. For this, the compressed air flows through an adsorbent, which is present as a fixed bed in a column.
Two columns adsorb and regenerate alternately. A carbon molecular sieve (CMS) is used as the adsorbent. When compressed air flows through the CMS, oxygen (adsorbtive) is preferentially adsorbed alongside other gases. Nitrogen passes through as the product gas and is collected in a storage tank.
Once the capacity of the adsorbent is exhausted, the adsorptive breaks through. To continuously obtain pure nitrogen, a pressure swing and column change-over must be carried out to regenerate the adsorbent. The desorbing column is purged by a manually adjusted partial flow of nitrogen from the adsorbing column.
The oxygen concentration is continuously recorded for breakthrough measurement. When a set limit value is reached, the system control triggers the pressure and column change. The oxygen concentration is measured to determine purity. The efficiency of the process can be balanced based on pressure, volumetric flow rate and temperature in the compressed air and product gas.
The trainer is supplied via a compressed air connection from the laboratory. The compressed air is treated in a maintenance unit before it is fed into the columns.
The trainer is controlled via the integrated PLC with touch screen. By means of an integrated router, the trainer can alternatively be operated and controlled via an end device. The user interface can also be displayed on additional end devices (screen mirroring). Via the PLC, the measured values can be stored internally. Access to stored measured values is possible from end devices via WLAN with integrated router/LAN connection to the customer’s own network.
