Abstract
The objective of this research work has been to examine how the air staging by using the addition of over fire air influence the formation of nitrogen oxide emissions in tangential pulverized-coal firing. Special attention has been paid to the reducing zones which develop in the furnace and the slagging of the boiler in order to observe the possible corrosion risk they cause. In addition to these, the effects of the air staging on the quality of the fly ash and on the combustion efficiency of the boiler have also been examined. The research work has been carried out at Salmisaari B power plant, owned by the City of Helsinki, in a 510 MW{sub t} pulverized-coal-fired boiler, which is equipped with corner-type burners. The boiler was fired with Polish coal during the tests. The tests showed that the nitrogen oxide emissions could be reduced from the starting level 200 - 300 mg NO{sub 2}/MJ before the installation of the over fire air to the level 180 mg NO{sub 2}/MJ, when the total amount of the combustion air was reduced to 122 % and the portion of the over fire air was increased up to 20 %. The amount of unburnt
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Citation Formats
Haemaelae, S.
Controlling the nitrogen oxide emissions in a pulverized-coal-fired boiler equipped with corner-type burners; Salmisaaren B K1-kattilan typenoksidipaeaestoejen rajoittaminen polttoteknisin keinoin.
Finland: N. p.,
1992.
Web.
Haemaelae, S.
Controlling the nitrogen oxide emissions in a pulverized-coal-fired boiler equipped with corner-type burners; Salmisaaren B K1-kattilan typenoksidipaeaestoejen rajoittaminen polttoteknisin keinoin.
Finland.
Haemaelae, S.
1992.
"Controlling the nitrogen oxide emissions in a pulverized-coal-fired boiler equipped with corner-type burners; Salmisaaren B K1-kattilan typenoksidipaeaestoejen rajoittaminen polttoteknisin keinoin."
Finland.
@misc{etde_10140364,
title = {Controlling the nitrogen oxide emissions in a pulverized-coal-fired boiler equipped with corner-type burners; Salmisaaren B K1-kattilan typenoksidipaeaestoejen rajoittaminen polttoteknisin keinoin}
author = {Haemaelae, S}
abstractNote = {The objective of this research work has been to examine how the air staging by using the addition of over fire air influence the formation of nitrogen oxide emissions in tangential pulverized-coal firing. Special attention has been paid to the reducing zones which develop in the furnace and the slagging of the boiler in order to observe the possible corrosion risk they cause. In addition to these, the effects of the air staging on the quality of the fly ash and on the combustion efficiency of the boiler have also been examined. The research work has been carried out at Salmisaari B power plant, owned by the City of Helsinki, in a 510 MW{sub t} pulverized-coal-fired boiler, which is equipped with corner-type burners. The boiler was fired with Polish coal during the tests. The tests showed that the nitrogen oxide emissions could be reduced from the starting level 200 - 300 mg NO{sub 2}/MJ before the installation of the over fire air to the level 180 mg NO{sub 2}/MJ, when the total amount of the combustion air was reduced to 122 % and the portion of the over fire air was increased up to 20 %. The amount of unburnt coal in the fly ash grew distinctly, which reduces the combustion efficiency of the boiler and the possibilities to use the fly ash as raw material in the construction material industry. The slagging of the boiler did not increase essentially, but in the burner zone of the furnace the formation of a reducing gas atmosphere was observed, which may increase the corrosion on the wall tubes in the furnace.}
place = {Finland}
year = {1992}
month = {Dec}
}
title = {Controlling the nitrogen oxide emissions in a pulverized-coal-fired boiler equipped with corner-type burners; Salmisaaren B K1-kattilan typenoksidipaeaestoejen rajoittaminen polttoteknisin keinoin}
author = {Haemaelae, S}
abstractNote = {The objective of this research work has been to examine how the air staging by using the addition of over fire air influence the formation of nitrogen oxide emissions in tangential pulverized-coal firing. Special attention has been paid to the reducing zones which develop in the furnace and the slagging of the boiler in order to observe the possible corrosion risk they cause. In addition to these, the effects of the air staging on the quality of the fly ash and on the combustion efficiency of the boiler have also been examined. The research work has been carried out at Salmisaari B power plant, owned by the City of Helsinki, in a 510 MW{sub t} pulverized-coal-fired boiler, which is equipped with corner-type burners. The boiler was fired with Polish coal during the tests. The tests showed that the nitrogen oxide emissions could be reduced from the starting level 200 - 300 mg NO{sub 2}/MJ before the installation of the over fire air to the level 180 mg NO{sub 2}/MJ, when the total amount of the combustion air was reduced to 122 % and the portion of the over fire air was increased up to 20 %. The amount of unburnt coal in the fly ash grew distinctly, which reduces the combustion efficiency of the boiler and the possibilities to use the fly ash as raw material in the construction material industry. The slagging of the boiler did not increase essentially, but in the burner zone of the furnace the formation of a reducing gas atmosphere was observed, which may increase the corrosion on the wall tubes in the furnace.}
place = {Finland}
year = {1992}
month = {Dec}
}