The effect of air amount on the operating parameters of a device for atomizing fuel with superheated steam in a gasification chamber
I.S. Sadkin, E.P. Kopyev
Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: burner, fuel atomization, superheated steam, primary air, gasification chamber, operating parameters, NOₓ and CO emissions
Abstract
A study was conducted on the thermal and environmental characteristics of liquid hydrocarbon fuel combustion in a steam-atomizing burner with a gasification chamber under limited air supply to the chamber at various power parameters. It was shown for the first time that limiting the primary air supply to the gasification chamber during steam atomization leads to a narrowing of the device's operating zone and a shift in carbon monoxide emission characteristics compared to a device with free air supply. At the same time, a key advantage is a significant reduction (up to 70%) in nitrogen oxide emissions due to lower peak temperatures in the combustion zone. A comparison of the performance of a device with a forced-air controlled air supply revealed that, with the same amount of air in the gasification chamber, the different supply methods exhibit differences in the distribution of combustion products in the flame, such as CO, H₂, and CH₄, due to the higher temperatures achieved with forced air supply. Consequently, it was established that modifying an atmospheric steam-atomizing burner by limiting the air supply to the gasification chamber allows for a reduction in NOₓ production over a wide power range while maintaining high combustion efficiency.
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