Anthracite combustion characteristics and NO x formation of a 300 MW e down-fired boiler with swirl burners at different loads after the implementation of a new combustion system

Chen, Zhichao; Wang, Qingxiang; Wang, Bingnan; Zeng, Lingyan; Che, Miaomiao; Zhang, Xin; Li, Zhengqi

doi:10.1016/j.apenergy.2016.12.063

Cited by 53 publications

(21 citation statements)

References 39 publications

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“…Furthermore, the latter is determined by three factors: coal combustion velocity, real flue gas produced by unit coal, and NO x standard concentration, which are specified in Equation (9). According to mass balance in coal combustion process [31,33,34], real flue gas V flue, real , and NO x standard concentration c NOx ,6% are measured by Equations (10-11) and Equations (12)(13)(14), respectively.…”

Section: Co 2 Equivalent Of N 2 O Emissionsmentioning

confidence: 99%

“…Another multiplier in Equation (9), NO x standard concentration c NOx ,6% , is settled by modifying NO x concentration in real flue gas according to Equation (12). Generally, NO x is formed in two ways: fuel-NO x and thermal-NO x , as shown in Equation (14). According to ministry of environmental protection of China (MEP) [32], nitrogen conversion ratio β is 22% for pulverized coal boiler and 18% for circulating fluidized bed (CFB) boiler, and thermal-NO x concentration c NO, thermal is 93.3 mg/Nm 3 [35].…”

Section: Co 2 Equivalent Of N 2 O Emissionsmentioning

confidence: 99%

“… investigate eight power plants in China and get that NO x concentration varies from 237 to 945 mg/Nm 3 , where main influence factors are associated with unit size, coal content, boiler type, and combustion pattern. Similar results are also found in other articles .…”

Section: Introductionmentioning

confidence: 99%

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GHGs emission and mitigation burden for power plants in western china considering N₂O and SO₂ removal

2019

Env Prog and Sustain Energy

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Focusing on greenhouse gases (GHGs), this article explores the actual emissions and mitigation burden of coal‐fired power plants in western region of China. Utilizing the 2006 IPCC technology‐detailed methodology, this article developed a coal content‐based GHG measurement system under consideration of N2O emission and SO2 removal, thereafter employed it to evaluate 151 power plants in western China in 2014. At regional level, the three segmented emission sources: CO2 and N2O from coal combustion, and CO2 from sulfur content depreciation, each contributes to emission intensity at 1011.26, 8.24 and 6.09 gCO2e/KWh, respectively. At plant‐specific level, emission intensity is very different, with an average of 1025.60 as well as an interval of 722.38–1796.67 gCO2e/KWh, which implies large gap in mitigation burden among power plants. Comparing mitigation cost of two pathways: CCS technology and carbon market mechanism, it is verified that on average, the former induces electricity price raised by 64.84%–97.26%, while the latter only induces 8.32% upward. From mitigation burden perspective, carbon market is more feasible than CCS technology to motivate power plant to carry out GHGs abatement in the short‐run period. © 2019 American Institute of Chemical Engineers Environ Prog, 38: e13224, 2019

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Section: Co 2 Equivalent Of N 2 O Emissionsmentioning

confidence: 99%

Section: Co 2 Equivalent Of N 2 O Emissionsmentioning

confidence: 99%

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GHGs emission and mitigation burden for power plants in western china considering N₂O and SO₂ removal

2019

Env Prog and Sustain Energy

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“…decreased the NO x emissions of a 600 MW wall-fired boiler through outer secondary air vane angles optimization [13], and numerically studied the effect of varying swirl burner cone length on the ignition and NO x emissions in a cylindrical furnace [14]. Chen et al [15] added a baffle ring to a swirl burner duct outlet to improve the penetration depth of coal/air flow, which obtained favorable results for NO x control in a 300 MW down-fired boiler. Li et al [16] discussed the effect of swirl burner outer secondary air vane angle variation on combustion characteristics and NO x emissions with laboratory-scale and industrial-scale experiments, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in order to improve the capacity of renewable energy sources, developing deep peaking transformation for coal-fired power plant is meaningful [26]. Some researchers have studied combustion characteristics under different loads, including ignition and NO x formation [15,27]. Nonetheless, how to use burner flaring for improving ignition under different loads is still less reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Combustion Characteristics and NOx Emission through a Swirling Burner with Adjustable Flaring Angle

et al. 2018

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A swirling burner with a variable inner secondary air (ISA) flaring angle β is proposed and a laboratory scale opposed-firing furnace is built. Temperature distribution and NOx emission are designedly measured. The combustion characteristics affected by variable β are experimentally evaluated from ignition and burnout data. Meanwhile, NOx reduction by the variable β is analyzed through emissions measurements. Different inner/outer primary coal-air concentration ratios γ, thermal loads and coal types are considered in this study. Results indicate that β variation provides a new approach to promote ignition and burnout, as well as NOx emission reduction under conditions of fuel rich/lean combustion and load variation. The recommended β of a swirling burner under different conditions is not always constant. The optimal βopt of the swirling burner under all conditions for different burning performance are summarized in the form of curves, which could provide reference for exquisite combustion adjustment.

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Experimental combustion characteristics and NO_x emissions for a 600‐MWe utility boiler after the retrofitted: Effects of load variation

Wang,

Deng,

et al. 2024

Asia-Pacific J Chem Eng

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To enhance the rapid switching ability of the boiler load and reduce NOx emissions, a new combustion system was implemented in a 600‐MWe wall‐fired boiler with swirl burners. This system included two levels of overfire air (OFA) and low NOx combustion technology. Industrial tests were conducted at 300‐, 450‐, and 600‐MWe loads before and after the retrofitted. These tests included measuring flue gas and furnace temperatures with thermocouples and analyzing local gas concentrations using a gas analyzer. The research results indicate that under conditions where the OFA ratio exceeds 30%, the burner exhibits good ignition performance at different loads. At the 600‐MWe load, the nitrogen oxides (NOx) emissions were reduced by 55% compared to before the retrofit. After the retrofit, the flame center inside the furnace of different loads was located at the height of 33.36 m, the first and second‐stage cooling water quantities were slightly higher, the reheat cooling water quantity was greatly reduced after the retrofit, and contributes to the boiler's safe operation. Under different load conditions after the retrofit, the gas temperature near the sidewall was below 850°C, and the O2 concentration near the sidewall was above 5%, effectively suppressing sidewall high‐temperature corrosion and slagging.

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Anthracite combustion characteristics and NO x formation of a 300 MW e down-fired boiler with swirl burners at different loads after the implementation of a new combustion system

Cited by 53 publications

References 39 publications

GHGs emission and mitigation burden for power plants in western china considering N₂O and SO₂ removal

GHGs emission and mitigation burden for power plants in western china considering N₂O and SO₂ removal

Combustion Characteristics and NOx Emission through a Swirling Burner with Adjustable Flaring Angle

Experimental combustion characteristics and NO_x emissions for a 600‐MWe utility boiler after the retrofitted: Effects of load variation

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Anthracite combustion characteristics and NO x formation of a 300 MW e down-fired boiler with swirl burners at different loads after the implementation of a new combustion system

Cited by 53 publications

References 39 publications

GHGs emission and mitigation burden for power plants in western china considering N2O and SO2 removal

GHGs emission and mitigation burden for power plants in western china considering N2O and SO2 removal

Combustion Characteristics and NOx Emission through a Swirling Burner with Adjustable Flaring Angle

Experimental combustion characteristics and NOx emissions for a 600‐MWe utility boiler after the retrofitted: Effects of load variation

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GHGs emission and mitigation burden for power plants in western china considering N₂O and SO₂ removal

GHGs emission and mitigation burden for power plants in western china considering N₂O and SO₂ removal

Experimental combustion characteristics and NO_x emissions for a 600‐MWe utility boiler after the retrofitted: Effects of load variation