The didactic focus of the air subject area is the various methods for treating gaseous media (air pollution control). Most contaminants can be removed from an exhaust airflow by mechanical or thermal processes.
The aim of mechanical processes is separation of particles from an exhaust gas flow (dust extraction). The separation of particulate matter in particular is of great importance.
Solid separation from gases with a cyclone
- influence of solid content and volumetric air flow rate on
- pressure loss at the cyclone
- degree of separation
- separation function and separation size (with suitable analysis device)
- comparison of pressure loss and degree of separation with theoretically calculated values
Thermal processes are used to remove gaseous contaminants. The exhaust gas should largely be free of dust, which means mechanical cleaning needs to take place initially.
Separating a carbon dioxide/air mixture by absorption in counterflow
- investigation of the absorption process when separating gas mixtures in a packed column
- determination of pressure losses in the column
- representation of the absorption process in an operating diagram
- investigation of the variables influencing the effectiveness of absorption