Principle, calibration, and application of the in situ alkali chloride monitor
2009 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 80, no 2, 023104-1-023104-4 p.Article in journal (Refereed) Published
The extended use of biomass for heat and power production has caused increased operational problems with fouling and high-temperature corrosion in boilers. These problems are mainly related to the presence of alkali chlorides (KCl and NaCl) at high concentrations in the flue gas. The In-Situ Alkali Chloride Monitor (IACM) was developed by Vattenfall Research and Development AB for measuring the alkali chloride concentration in hot flue gases (>650 oC). The measurement technique is based on molecular differential absorption spectroscopy in the UV range. Simultaneous measurement of SO2 concentration is also possible. The measuring range is 1-50 ppm for the sum of KCl and NaCl concentrations, and 4-750 ppm for SO2. This paper describes the principle of the IACM as well as its calibration. Furthermore, an example of its application in an industrial boiler is given.
Place, publisher, year, edition, pages
American Institute of Physics , 2009. Vol. 80, no 2, 023104-1-023104-4 p.
bioenergy conversion, boilers, corrosion, flue gases, gas sensors, ultraviolet spectra
IdentifiersURN: urn:nbn:se:umu:diva-19738DOI: 10.1063/1.3081015OAI: oai:DiVA.org:umu-19738DiVA: diva2:202469