Startseite Experimental study on the influence of fuel-rich and fuel-lean coal/airflow ratio on aerodynamic characteristics of a 300MWe foster wheeler down-fired boiler
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Experimental study on the influence of fuel-rich and fuel-lean coal/airflow ratio on aerodynamic characteristics of a 300MWe foster wheeler down-fired boiler

  • He Du , Zhengqi Li EMAIL logo , Mingdi Zhang , Ning Zhang , Zhichao Chen , Jian Song , Fan Fang , Jianjun Su und Haibing Liu
Veröffentlicht/Copyright: 8. September 2022
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International Journal of Chemical Reactor Engineering
Aus der Zeitschrift International Journal of Chemical Reactor Engineering Band 21 Heft 5

Abstract

To address the problem of late ignition and poor burnout of Foster-Wheeler down-fired boilers, this study proposed a new combustion technology, which combines adding on arch secondary air and alternately arranging the fuel-lean coal/airflow (FLCA) and fuel-rich coal/airflow (FRCA). The coal particle trajectories of FLCA and FRCA and overall aerodynamic characteristics in the furnace were studied at FRCA and FLCA ratio (RRL) of 5:5, 7:3, and 9:1. The results showed that even at a low FRCA ratio, the new combustion technology could still effectively ensure the penetration depth of pulverised coal/airflow. At different RRL values, the main airflow from the arch appeared in the near-wall area and could penetrate downwards into the cold ash hopper area. With an increase in the value of RRL, the deflection degree of FLCA towards the furnace wall increased, while that of FRCA decreased. At RRL of 7:3, both the penetration depth and deflection degree of FRCA and FLCA were at a high level, which was conductive to promoting the burnout and recommended in practical applications.

Keywords: aerodynamic field; coal/airflow trajectories; down-fired boiler; new combustion technology; smog tracing
Corresponding author: Zhengqi Li, School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, 150001, Harbin, P.R. China, E-mail:

Funding source: Heilongjiang Touyan Innovation Team Program

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work is supported by Heilongjiang Touyan Innovation Team Program.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Supplementary Material

The online version of this article offers supplementary material (https://doi.org/10.1515/ijcre-2022-0141).

Received: 2022-07-14
Accepted: 2022-08-25
Published Online: 2022-09-08

© 2022 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/ijcre-2022-0141
Schlagwörter für diesen Artikel
aerodynamic field; coal/airflow trajectories; down-fired boiler; new combustion technology; smog tracing

Artikel in diesem Heft

  1. Frontmatter
  2. Articles
  3. Numerical study of post-combustion characteristic in a smelting reduction furnace
  4. Experimental study and modeling of denitrification in an MBBR reactor
  5. Experimental study on the influence of fuel-rich and fuel-lean coal/airflow ratio on aerodynamic characteristics of a 300MWe foster wheeler down-fired boiler
  6. Effect of La on the catalytic performance of mesoporous Ni/γ-Al2O3 catalysts for dry reforming of methane
  7. Adsorption of paratoluic acid on MIL-53 (Al) metal-organic framework, and response surface methodology optimization
  8. An intelligent dynamic setting control framework for a multimode impurity removal process
  9. Optimization of microwave-assisted synthesis process for water-soluble ammonium polyphosphate from urea phosphate and urea
  10. Oxidation of NMST to NMSBA catalyzed by Co/Mn/Br together with porous carbon made from coconut shell with acetic acid as an activator
  11. Influence of blast volume on hot blast distribution rule around the hearth circumferentially
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