年間 8 号発行
ISSN 印刷: 2150-3621
ISSN オンライン: 2150-363X
Indexed in
REDUCTION OF ENVIRONMENTAL POLLUTION UNDER NATURAL GAS COMBUSTION BY MEANS OF FLAT-FLAME BURNERS OF NEW GENERATION
要約
This presentation combines the generalization of the modern state of the art of flat-flame burners (FFBs) development and previous investigations of the FFB of GPP series (Erinov and Soroka, 1970) being developed by the Gas Institute (GI) under the author’s participation and guidance, as well as presents the results of R&D of the FFB of a new generation titled GPP-LE. Burners of type LE FFB represent universal burner design from the standpoint of temperature range of the furnace operation by simultaneous conditions of variation of the furnace thermal capacity and change of combustion air preheating and excess factor. The systematic R&D investigations have been carried out in an area of fluid dynamics and mass-and-heat-transfer processes under fuel combustion by use of the FFB. The main attention has been paid to the studying of the aerodynamic structure of the central region along the axis of combustion chamber that is responsible for the Coanda effect provision as well as for the macrokinetics of fuel burning and of pollutants formation. Burners (LE FFB) ensure superstable, low-emission fuel combustion by a wide range of furnace temperatures (500–1900 K; moreover, beginning from ambient temperatures) and combustion air preheating (up to 800 K) to satisfy any complicated and variable operation conditions (usually for heat treatment furnaces). The environmental advantages are superlow emission combustion–concentration values of the main pollutants are lower than accordingly any international norms and national standards (Thomas, B., 2006; Berger et al., 2006): [NOx] is no more than 20−50 ppm (depending on air preheating (300−800 K) within the furnace temperature range up to 1773 K; [CO] is no more than 10 ppm. The LE FFB characteristics are presented in comparison with the best suitable indicators of the FFB of the existing designs and accordingly the latest development. The set of ensured characteristics is unique in comparison to those for any FFB in the world market including the burners using the FLOX combustion mechanism (wunning, 2003).