A novel corner-fired boiler system of improved efficiency and coal flexibility and reduced NOx emissions

Lun Ma, Qingyan Fang, Chungen Yin, Huajian Wang, Cheng Zhang, Gang Chen

Research output: Contribution to journalJournal articleResearchpeer-review

2 Citations (Scopus)

Abstract

To assure stable ignition and combustion of low-volatile coals in conventionally configured boilers, storage systems are commonly used to separate the ground coal from the air or gas and evaporated moisture prior to the combustion process, and the stored ground coal is then transported by hot air to the combustion process. This study is to develop a novel combustion system, in order to facilitate the firing of different types of coals in existing conventional corner-fired boilers originally configured for low-volatile semianthracite-firing and to improve the boiler performance. Numerical simulation, boiler retrofit and full-scale performance test are conducted. After successful demonstration in a 330 MWe semianthracite corner-fired utility boiler, the novel combustion scheme is implemented in retrofit of two other similar boilers. The simulation and full-scale performance test on all the three boilers show that the use of the new combustion system achieves a significant reduction in NOx emissions and a remarkable increase in boiler efficiency whereas induces no side effect in operation. After retrofit, these boilers can also readily accommodate low-volatile semianthracite (the design coal) and high-volatile bituminous coal (the retrofit coal), largely improving the coal flexibility.
Original languageEnglish
JournalApplied Energy
Volume238
Pages (from-to)453-465
Number of pages13
ISSN0306-2619
DOIs
Publication statusPublished - 15 Mar 2019

Fingerprint

Boilers
Coal
coal
combustion
Boiler firing
boiler
bituminous coal
Bituminous coal
air
Air
simulation
Ignition
Moisture
Demonstrations
moisture
Computer simulation
Gases
gas

Keywords

  • Corner-fired boiler
  • Combustion
  • CFD
  • Coal flexibility
  • NOx emissions
  • Thermal efficiency
  • NO emissions

Cite this

Ma, Lun ; Fang, Qingyan ; Yin, Chungen ; Wang, Huajian ; Zhang, Cheng ; Chen, Gang. / A novel corner-fired boiler system of improved efficiency and coal flexibility and reduced NOx emissions. In: Applied Energy. 2019 ; Vol. 238. pp. 453-465.
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title = "A novel corner-fired boiler system of improved efficiency and coal flexibility and reduced NOx emissions",
abstract = "To assure stable ignition and combustion of low-volatile coals in conventionally configured boilers, storage systems are commonly used to separate the ground coal from the air or gas and evaporated moisture prior to the combustion process, and the stored ground coal is then transported by hot air to the combustion process. This study is to develop a novel combustion system, in order to facilitate the firing of different types of coals in existing conventional corner-fired boilers originally configured for low-volatile semianthracite-firing and to improve the boiler performance. Numerical simulation, boiler retrofit and full-scale performance test are conducted. After successful demonstration in a 330 MWe semianthracite corner-fired utility boiler, the novel combustion scheme is implemented in retrofit of two other similar boilers. The simulation and full-scale performance test on all the three boilers show that the use of the new combustion system achieves a significant reduction in NOx emissions and a remarkable increase in boiler efficiency whereas induces no side effect in operation. After retrofit, these boilers can also readily accommodate low-volatile semianthracite (the design coal) and high-volatile bituminous coal (the retrofit coal), largely improving the coal flexibility.",
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A novel corner-fired boiler system of improved efficiency and coal flexibility and reduced NOx emissions. / Ma, Lun; Fang, Qingyan; Yin, Chungen; Wang, Huajian; Zhang, Cheng; Chen, Gang.

In: Applied Energy, Vol. 238, 15.03.2019, p. 453-465.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - A novel corner-fired boiler system of improved efficiency and coal flexibility and reduced NOx emissions

AU - Ma, Lun

AU - Fang, Qingyan

AU - Yin, Chungen

AU - Wang, Huajian

AU - Zhang, Cheng

AU - Chen, Gang

PY - 2019/3/15

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