Gas monitoring instruments and systems for stack testing
Several EU directives and national laws in European countries set requirements for continuous monitoring of flue gas emissions at power plants. Further requirements are set on the quality assurance of the installed measurement systems at the plants. The relevant standard in this regard is EN 14181:2004, the quality assurance of automated measuring systems. The standard dictates how to determine that the measurement systems installed for continuous emissions monitoring at a plant operate according to the directives and regulations set. Two major parts of this on-going quality assurance cycle are the QAL2 and AST procedures. A test laboratory performs tests on the systems on-site, and determines whether the systems fulfill the set requirements or not.
The Gasmet Portable DX4000 Multicomponent Gas Analyzer and its Portable Sampling System are a tested and tried solution for the test laboratories that wish to make these tests. The system parts can be transported to the measurement location and assembled there for the measurements. The hot-and-wet extractive sampling combined to the FTIR measurement technique means that no special sample preparation is required in stack testing. The DX4000 analyzer and the Portable Sampling System combination has the coveted MCERTS certification from Sira Environmental for stack emissions monitoring. The system measures at once a great selection of the typically monitored gaseous emissions components:
- H2O, CO and CO2
- Nitrogen oxides (NOx, that is nitrogen monoxide NO and nitrogen dioxide NO2) and nitrous oxide N2O
- Water-soluble components such as SO2, NH3, HF and HCl
- Several hydrocarbons such as methane CH4, ethane C2H6, propane C3H8, and many others