Investigation on ignition behaviors of pulverized coal particles in a tubular swirl burner

Xu, Yang; Axt, Christian; Song, Ming; Kneer, Reinhold; Li, Shuiqing

doi:10.1016/j.proci.2020.07.131

Cited by 11 publications

(2 citation statements)

References 29 publications

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“…More details of the burner can be seen in the literature. 40 The tangential swirl burner has a swirl number S fully determined by the geometrical structure of the burner. The swirl number is defined as the ratio of the axial flux of angular momentum to the axial flux of linear momentum: 41…”

Section: Methodsmentioning

confidence: 99%

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Reducing NO_x Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy

et al. 2022

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Ammonia as a fuel can be a carbon-free and longduration scalable hydrogen energy carrier. In the carbon-neutral power system, co-firing ammonia with natural gas is a promising technique for flexible operations of gas turbines and gas-fired boilers. However, the NO x propensity of ammonia/methane flames is a severe problem under global fuel-lean conditions. This work has investigated the NO x performance of various fueloxidizer mixing strategies on a tangential swirl burner. We propose a new ammonia co-combustion technology with a central ammonia jet surrounded by a group of separately tangential swirl methane jets. The NO x emissions can be reduced to about 1000 ppm under lean combustion conditions (global Φ = 0.5−0.9) when the ammonia blending ratio (E NH3 , in terms of input energy) is 20% (corresponding to the ammonia molar fraction x NH3 as 0.41). Regarding the NO x emissions and ammonia slip at the tube exit, such a strategy outperforms other feed modes for a wide range of ammonia blending ratios (E NH3 up to 0.3 and x NH3 up to 0.52) and equivalence ratios (Φ ranging from 0.5 to 1.1). The variations of emitted NO x with the total flow rate and the axial position of ammonia injection were also studied. Combining measurements of gaseous temperature, composition, and NH 2 * chemiluminescence, we demonstrated the massive formation of NH 2 radicals in the central high-temperature ammonia-rich zone. A model involving the chemical reaction network was developed and validated against the experiments. It provides further evidence for the role of NH 2 radicals in reducing NO x emission.

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Section: Methodsmentioning

confidence: 99%

“…A transparent quartz tube with a 30 mm diameter and 200 mm length is applied to confine the flame (see typical tubular flame morphology in Figure a). More details of the burner can be seen in the literature …”

Section: Methodsmentioning

confidence: 99%

Reducing NO_x Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy

et al. 2022

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Spatially-Resolved experimental investigations of combustion characteristics in a solid fuel doped methane swirl flame and the influence on the formation of ultrafine particulate matter

Axt

Maßmeyer²,

Pielsticker³

et al. 2022

Combustion and Flame

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Biomass combustion behaviors based on online monitoring system: Morphological, thermodynamic and kinetic analysis

Zha

Wang³

et al. 2023

Combustion and Flame

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Investigation on ignition behaviors of pulverized coal particles in a tubular swirl burner

Cited by 11 publications

References 29 publications

Reducing NO_x Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy

Reducing NO_x Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy

Spatially-Resolved experimental investigations of combustion characteristics in a solid fuel doped methane swirl flame and the influence on the formation of ultrafine particulate matter

Biomass combustion behaviors based on online monitoring system: Morphological, thermodynamic and kinetic analysis

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Investigation on ignition behaviors of pulverized coal particles in a tubular swirl burner

Cited by 11 publications

References 29 publications

Reducing NOx Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy

Reducing NOx Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy

Spatially-Resolved experimental investigations of combustion characteristics in a solid fuel doped methane swirl flame and the influence on the formation of ultrafine particulate matter

Biomass combustion behaviors based on online monitoring system: Morphological, thermodynamic and kinetic analysis

Contact Info

Product

Resources

About

Reducing NO_x Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy

Reducing NO_x Emission of Swirl-Stabilized Ammonia/Methane Tubular Flames through a Fuel-Oxidizer Mixing Strategy