Experimental investigation on the interaction of flame stability, radiation, burnout, and emissions in a semi-industrial-scale swirl-stabilised oxy-fuel furnance
The relevance of various phenomena (such as turbulence, chemical kinetics, or radiation) on the overall structure and stability of a flame is affected by the scale and boundary conditions of the furnace. For instance, radiative heat loss from the flame increases with the size of the enclosure if the walls are cooled, which may lead to local flame extinction and the formation of emissions, such as soot, hydrocarbons, and CO.
The main objective of this project is to identify the effect and interaction of these phenomena in a furnace operating at conditions close to industrial applications, in particular, the mechanisms leading to pollutant formation caused by flame instabilities. This project will evaluate the influence of scale on the flame structure, which will allow assessing to what extent the results of project partners (determined on a smaller scale) can be transferred to furnaces on an industrial scale. The experiments are conducted in a water-cooled top-fired furnace with thermal power of 1 MWth. Using a variety of complementary measurement technologies at various ports along the furnace axis, mean values, fluctuations, temperature, gas composition, and radiative heat transfer are determined in collaboration with project partners.