Absorption is used to remove one or more gas components from a gas flow using a solvent.
Firstly, a gas mixture of CO2 and air is produced. Valves can be used to adjust the mixing ratio. A compressor delivers the gas mixture into the absorption column from below. In the column, part of the CO2 is separated in counterflow with the solvent (water). In order to separate the CO2 absorbed in the water, the charged water is pumped from the lower section of the absorption column into the stripping column. A compressor is connected to the stripping column (intake side). The resulting negative pressure generates a high air flow rate in counterflow to the charged water. During the stripping process, the air absorbs the CO2 from the water. A pump feeds the regenerated solvent back into the absorption column. In the return pipe, the flow passes through a heat exchanger. This together with an external cooling water supply allows the temperature of the solvent to be lowered.
The CO2 contents before and after the column, the gas and water flow rates, and relevant temperatures and pressures are continuously recorded. The two-section absorption column is equipped with two differential pressure sensors to measure the pressure losses.
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.
