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Nitrogen oxide abatement by distributed fuel addition

Description: The performance of the new combustor was tested. Experiments showed that this combustor has superior insulating quality than the previous one. Measured radial concentrations indicated uniform distribution of the primary fuel (coal) inside the fire tube resulting in reasonably flat concentration profiles. However, measured radial concentrations after the addition of the reburn fuel showed uneven distribution of the fuel resulting in parabolic concentration profiles, an indication of insufficient… more
Date: August 25, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: Mechanisms governing the inter-conversion and destruction of nitrogenous species in the fuel rich reburning zone of a laboratory coal combustor were explored. Emphasis was on a configuration in which the primary flame was of pulverized coal and the reburning fuel was natural gas, although other fuels were also considered. The objective was to extract models to be used in estimating reburning effectiveness in practical combustors. Reburning mechanisms occur in two regimes; one in which fast reac… more
Date: February 1, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: A screening study was performed on a laboratory scale downfired combustor to determine the effect of various variables on the effectiveness of the reburning process as a technique for NO{sub X} abatement. The objective was to define optimum conditions under which reburning can be used and to be able to compare the reburning performance of our combustor to those reported by others. For this purpose, a statistically designed parametric investigation was conducted to determine how a set of control… more
Date: February 28, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 10, November 1, 1989--January 31, 1990

Description: Mechanisms governing the inter-conversion and destruction of nitrogenous species in the fuel rich reburning zone of a laboratory coal combustor were explored. Emphasis was on a configuration in which the primary flame was of pulverized coal and the reburning fuel was natural gas, although other fuels were also considered. The objective was to extract models to be used in estimating reburning effectiveness in practical combustors. Reburning mechanisms occur in two regimes; one in which fast reac… more
Date: February 1, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 13, August 1, 1990--October 31, 1990

Description: Reburning experiments are presented in which the effect of the primary flame mode is examined. The application of reburning downstream of an axial diffusion primary flame without swirl is compared to reburning results in which the primary flame is premixed. The comparison is qualitative and is intended to examine reburning under more realistic conditions of utility boilers, where premixed flames are not common. Experimental results of reburning tests using nitrogen containing reburning fuels (a… more
Date: January 2, 1991
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 12, May 1, 1990--July 31, 1990

Description: The research reported here is concerned with the application of secondary fuel addition, otherwise known as reburning, as a means of NO{sub x} destruction downstream of the primary flame zone in boilers. This paper consists of two parts: First, results from a statistically correct design of parametric experiments on a laboratory coal combustor are presented. These allow the effects of the most important variables to be isolated and identified. Second, mechanisms governing the inter-conversion a… more
Date: August 27, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 5, August 1, 1988--October 31, 1988

Description: A screening study was performed on a laboratory scale downfired combustor to determine the effect of various variables on the effectiveness of the reburning process as a technique for NO{sub x} abatement. The objective was to define optimum conditions under which reburning can be used and to be able to compare the reburning performance of our combustor to those reported by others. For this purpose, a statistically designed parametric investigation was conducted to determine how a set of control… more
Date: December 27, 1988
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 7, February 1, 1989--April 30, 1989

Description: A combustor has been designed in order to retard the formation of nitrogen oxides by injection of reburning fuel. The design and the rebuilding of the new combustor was completed. Several new features were incorporated in the new design so that it would last longer. The design and construction of the furnace are discussed in this report. (VC)
Date: June 20, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 11, February 1, 1990--April 30, 1990

Description: The formation and destruction of nitrogenous species in the fuel rich coal post flame of a laboratory coal combustor were explored. The fuel rich zones in reburning and air staging configurations were compared under a variety of conditions. The objective was to determine the relative significance of homogeneous and heterogeneous sources of HCN formation and to extract models that can predict nitrogenous species profiles in fuel rich zones. Heterogeneous effects on HCN formation due to the slow … more
Date: August 27, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Final report

Description: Reburning is examined as a means of NO{sub x} destruction in a 17 kW down-fired pulverized coal combustor. In reburning, a secondary fuel is introduced downstream of the primary flame to produce a reducing zone, favorable to NO destruction, and air is introduced further downstream to complete the combustion. Emphasis is on natural gas reburning and a bituminous coal primary flame. A parametric examination of reburning employing a statistical experimental design, is conducted, complemented by de… more
Date: September 20, 1991
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 9, August 1, 1989--October 31, 1989

Description: Experiments were conducted to investigate the processes that influence the destruction of NO in the fuel rich stage of the reburning process. The objective is to gain a better understanding of the mechanisms that control the fate of coal nitrogen in the fuel rich zone of a combustion process. Time resolved profiles of temperature, major (CO{sub 2}, CO, H{sub 2}O, O{sub 2}, H{sub 2} and N{sub 2}), nitrogenous (NO, HCN and NH{sub 3}) and hydrocarbon (CH{sub 4} and C{sub 2}H{sub 2}) species were o… more
Date: November 20, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 8, May 1, 1989--July 31, 1989

Description: The performance of the new combustor was tested. Experiments showed that this combustor has superior insulating quality than the previous one. Measured radial concentrations indicated uniform distribution of the primary fuel (coal) inside the fire tube resulting in reasonably flat concentration profiles. However, measured radial concentrations after the addition of the reburn fuel showed uneven distribution of the fuel resulting in parabolic concentration profiles, an indication of insufficient… more
Date: August 25, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. Quarterly report No. 6, November 1, 1988--January 31, 1989

Description: A screening study was performed on a laboratory scale downfired combustor to determine the effect of various variables on the effectiveness of the reburning process as a technique for NO{sub X} abatement. The objective was to define optimum conditions under which reburning can be used and to be able to compare the reburning performance of our combustor to those reported by others. For this purpose, a statistically designed parametric investigation was conducted to determine how a set of control… more
Date: February 28, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition. [Reburning, mixing, effect of concentration of nitrogen]

Description: Reburning experiments are presented in which the effect of the primary flame mode is examined. The application of reburning downstream of an axial diffusion primary flame without swirl is compared to reburning results in which the primary flame is premixed. The comparison is qualitative and is intended to examine reburning under more realistic conditions of utility boilers, where premixed flames are not common. Experimental results of reburning tests using nitrogen containing reburning fuels (a… more
Date: January 2, 1991
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: Experiments were conducted to investigate the processes that influence the destruction of NO in the fuel rich stage of the reburning process. The objective is to gain a better understanding of the mechanisms that control the fate of coal nitrogen in the fuel rich zone of a combustion process. Time resolved profiles of temperature, major (CO{sub 2}, CO, H{sub 2}O, O{sub 2}, H{sub 2} and N{sub 2}), nitrogenous (NO, HCN and NH{sub 3}) and hydrocarbon (CH{sub 4} and C{sub 2}H{sub 2}) species were o… more
Date: November 20, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: The formation and destruction of nitrogenous species in the fuel rich coal post flame of a laboratory coal combustor were explored. The fuel rich zones in reburning and air staging configurations were compared under a variety of conditions. The objective was to determine the relative significance of homogeneous and heterogeneous sources of HCN formation and to extract models that can predict nitrogenous species profiles in fuel rich zones. Heterogeneous effects on HCN formation due to the slow … more
Date: August 27, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: A screening study was performed on a laboratory scale downfired combustor to determine the effect of various variables on the effectiveness of the reburning process as a technique for NO{sub x} abatement. The objective was to define optimum conditions under which reburning can be used and to be able to compare the reburning performance of our combustor to those reported by others. For this purpose, a statistically designed parametric investigation was conducted to determine how a set of control… more
Date: December 27, 1988
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: Reburning is examined as a means of NO{sub x} destruction in a 17 kW down-fired pulverized coal combustor. In reburning, a secondary fuel is introduced downstream of the primary flame to produce a reducing zone, favorable to NO destruction, and air is introduced further downstream to complete the combustion. Emphasis is on natural gas reburning and a bituminous coal primary flame. A parametric examination of reburning employing a statistical experimental design, is conducted, complemented by de… more
Date: September 20, 1991
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: The research reported here is concerned with the application of secondary fuel addition, otherwise known as reburning, as a means of NO{sub x} destruction downstream of the primary flame zone in boilers. This paper consists of two parts: First, results from a statistically correct design of parametric experiments on a laboratory coal combustor are presented. These allow the effects of the most important variables to be isolated and identified. Second, mechanisms governing the inter-conversion a… more
Date: August 27, 1990
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide abatement by distributed fuel addition

Description: A combustor has been designed in order to retard the formation of nitrogen oxides by injection of reburning fuel. The design and the rebuilding of the new combustor was completed. Several new features were incorporated in the new design so that it would last longer. The design and construction of the furnace are discussed in this report. (VC)
Date: June 20, 1989
Creator: Wendt, J. O. L. & Mereb, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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