OPERATION & MAINTENANCE OF POWER PLANTS
Bengt Löfstedt offers an overview of continuous monitoring of pollutant emissions to the ambient air
environmental awareness and legislative requirements have improved the situation notably over the past decades. But which rules apply, which pollutant emission targets are there and how are the emissions actually determined? It’s a huge topic so let’s limit ourselves to an overview of the special case of gaseous pollutant emissions to the ambient air.
EXPLAINED C
CONTINUOUS MONITORING
ombustion-based heat and power production has historically been a culprit when it comes to damaging the environment. However, increased
nowadays is looked upon with concern, given its key role in the global climate changes. However, the emission problems do not stop there. Te thermal processes also generate nitrogen oxides, primarily NO. Depending on the fuel composition, the combustion process, and in some cases the flue gas cleaning process, there can also
). Water is a non-issue while CO2 20
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THE USUAL SUSPECTS Teoretically, combustion of fuel merely gives emissions of water and carbon dioxide (CO2
The duct-mounted parts of an in-situ CEMS from Opsis. Broad-band light is emitted from a lamp inside the yellow box to the left. The light is sent through the duct where the gaseous pollutants absorb specific wavelengths. The remaining light is picked up in the box to the right, from where it is sent via an optical fibre to an analysis unit
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