Abstract: “Thermal power plants have begun to shift their choice of fuel to cheaper coals such as lignite to reduce operating costs and to maintain fuel sustainability. However, the properties of the cheaper coals are highly fluctuating and pose challenges to the combustion process, leading to higher slagging or fouling propensities. The slagging process starts with the deposition of ash, which in turn originated from the complex process of soot formation in the flame area. Therefore, any abnormalities such as temperature distribution imbalances can be traced through monitoring techniques at the combustion state within the flame area. In this study, an imaging technique based on the visible wavelength regime was used to capture the temperature profiles of a 700 MW boiler near the burner area for different coal types and boiler operating conditions. The temperature profiles will serve as a point of reference for the plant personnel to determine the combustion state with respect to the boiler opera”

Keywords: combustion, slagging, imaging, temperature profiles