Вплив способів вводу води в полум’я на ефективність горіння і викиди оксидів азоту

O. V. Kolbasenko

doi:10.31498/2225-6733.40.2020.216221

Authors

O. V. Kolbasenko National university of shipbuilding named after Admiral Makarov, Mykolayiv, Ukraine

DOI:

https://doi.org/10.31498/2225-6733.40.2020.216221

Keywords:

water in the combustion zone, water-fuel emulsion, microexplosions, restoration properties, thermal decomposition, acoustic vibrations

Abstract

The paper presents the results of comparative studies of the combustion quality and the values of the nitrogen oxides concentrations during the combustion of fuel oil M40, with the injection of water vapor into its combustion zone and burning water-fuel emulsions with water content W^r=15% and 30%, carried out on an experimental installation. The analysis of the obtained data showed that when burning the aqueous fuel emulsion with W^r=30%, the best combustion quality indicators were obtained, the indicators were estimated from the values of CO, H₂ concentrations and the sum (CO+H₂) in the combustion chamber zone. An increase in CO, H₂ and (CO+H₂) concentrations results in a decrease in the level of NO_x, NO and NO₂ and an increase in the NO₂:NO ratio up to 0,33 when burning emulsion with W^r=30%, which leads to a significant increase in the absorption properties of sulfuric acid and a decrease in the intensity of low-temperature sulfuric acid corrosion, which makes it possible the use of condensation low-temperature heating surfaces when burning emulsions based on sulfur fuel oil with W^r=30% and to increase the efficiency of boilers. Comparison of the combustion quality when water vapor is introduced and burning emulsions with W^r=30%, while taking into account the literature data, made it possible for us to assume that a decrease in NO_x emissions and an increase in the NO₂:NO ratio due to a higher concentration (CO+H₂), the appearance of hydrogen atoms with significant restoration properties, improved conditions for thermal decomposition of NO_x and an increasing intensity of acoustic vibration due to the sequence of microexplosions of droplets of water-fuel emulsions. Experimental studies have shown that water-fuel emulsions are not just products of mixing hydrocarbon fuel and a chemically inert liquid, but a completely special type of fuel that qualitatively and quantitatively changes the physicochemical processes of combustion

Author Biography

O. V. Kolbasenko, National university of shipbuilding named after Admiral Makarov, Mykolayiv

PhD студент

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