Abstract:As a result of the global energy crisis, all countries around the world are resorting to burning using the solid, liquid, and gaseous fuels, whichever is available. However, because of the difficulty of solid fuel combustion, the global trend goes to liquid fuel combustion as it is easier than solid fuel combustion, then goes to the gaseous fuel according to its ease of combustion than the other two types. But, because of the gaseous fuel scarcity and high price, the tendency to co-fire liquid and gaseous fuel… Show more
This paper presents a newly designed coaxial burner capable of simultaneous combustion of oil and gas fuels. The burner addresses the need for renewable energy production from syngas and biofuels derived from solid waste. The focus is on evaluating the burner's effectiveness in co-firing light diesel fuel and LPG, including flame appearance and exhaust emissions. The study establishes a reference for future comparisons when burning syngas and blended biofuels. The burner configuration allows for various influential variables, such as oil/gas ratio, and inner/outer air ratio. The evaluation concentrates on visible flame appearance, exhaust emissions, and heat transfer to the cooling water jacket. The experiments are conducted at a fixed 55 kW input load. Results indicate that different inner/outer air ratios have minimal impact on CO2 and O2 levels but affect CO and NOX levels, both in single fuel burning and co-firing scenarios. Increasing inner air reduces CO levels, particularly in oil fuel burning, while decreasing inner air reduces CO levels in co-firing.
This paper presents a newly designed coaxial burner capable of simultaneous combustion of oil and gas fuels. The burner addresses the need for renewable energy production from syngas and biofuels derived from solid waste. The focus is on evaluating the burner's effectiveness in co-firing light diesel fuel and LPG, including flame appearance and exhaust emissions. The study establishes a reference for future comparisons when burning syngas and blended biofuels. The burner configuration allows for various influential variables, such as oil/gas ratio, and inner/outer air ratio. The evaluation concentrates on visible flame appearance, exhaust emissions, and heat transfer to the cooling water jacket. The experiments are conducted at a fixed 55 kW input load. Results indicate that different inner/outer air ratios have minimal impact on CO2 and O2 levels but affect CO and NOX levels, both in single fuel burning and co-firing scenarios. Increasing inner air reduces CO levels, particularly in oil fuel burning, while decreasing inner air reduces CO levels in co-firing.
“…However, dual-fuel spray flames are more resistant to blow-off than single-fuel spray flames. Adam et al (2022) investigated the combustion performance of cofiring diesel with LPG in the burner. All the tested conditions are conducted at the same thermal power of 70 kW and equivalence ratio of 0.5.…”
The purpose of this study is to use biogas produced in industrial wastewater treatment plants to generate energy by co-combustion with diesel fuel or biodiesel to avoid the unstable flow rate of biogas and the variable methane ratio, which determines the biogas energy content. An experimental analysis was conducted in this study to determine the combustion and emissions performance of a 350 KW industrial burner fuelled with three different percentages of biogas: Biogas1 (CH4 75%, CO2 25%), Biogas2 (CH4 70%, CO2 30%), and Biogas3 (CH4 60%, CO2 40%) co-combusted with diesel or waste cooking oil biodiesel. Practical tests have demonstrated that in comparison to biogas and diesel fuel, the CO emission level of co-combustion biogases and biodiesel for B1000Biogas1, B100Biogas2, and B100Biogas3 was reduced by 60%, 50%, and 42%, while NOx emission increased by 52%, 47%, and 43%, along with the maximum flame temperature, by 9%, 10%, and 12%, respectively. The flame structures of the fuels in the swirl burner were investigated using flame pictures and contour temperature. The flame color for biodiesel and biogas was more brilliant and intense than for diesel and biogas. All the fuel test results demonstrate that inert CO2 in biogas composition has a substantial influence on the chemical reactions occurring in the flame and pollutant emissions due to its dilution effect and slowing oxidation reaction. The higher inert CO2 gas ratio in biogas caused a reduction in reaction intensity, which resulted in a weaker, unstable flame and also decreased flame temperature and NOx emissions. yield as well as high fermentation efficiency.
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