Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During Sintering
Against the backdrop of China′s "Dual Carbon", CO emission reduction technologies are crucial in the sintering process. We employed Computational Fluid Dynamics (CFD) to develop separate models for the combustion of fuel particles and for sintering machines. Numerical simulations were cond...
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Editorial Office of Energy Environmental Protection
2025-08-01
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| Series: | 能源环境保护 |
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| Online Access: | https://doi.org/10.20078/j.eep.20250406 |
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| author | Zhen LI Zhengjian LIU Jianliang ZHANG Yaozu WANG |
| author_facet | Zhen LI Zhengjian LIU Jianliang ZHANG Yaozu WANG |
| author_sort | Zhen LI |
| collection | DOAJ |
| description | Against the backdrop of China′s "Dual Carbon", CO emission reduction technologies are crucial in the sintering process. We employed Computational Fluid Dynamics (CFD) to develop separate models for the combustion of fuel particles and for sintering machines. Numerical simulations were conducted to study the effects of oxygen concentration on fuel particle combustion and the combustion process within the sintering bed. For fuel particles, increasing oxygen concentration effectively improves conditions for complete combustion, enhances fuel combustion efficiency, and reduces CO emissions. Higher oxygen levels promote more thorough oxidation reactions, ensuring a greater proportion of fuel conversion to carbon dioxide (CO2) rather than carbon monoxide (CO). However, the influence of oxygen concentration on fuel combustion behavior during sintering is more complex. Internal fuel combustion in the sintering bed is simultaneously affected by heat transfer and oxygen concentration within the material layer. Increasing oxygen concentration leads to a lower fuel ignition point, extending the high-temperature zone and increasing oxygen consumption due to incomplete combustion. When the increase in oxygen concentration is small, the proportion of incomplete fuel combustion increases. This is because the additional oxygen initially promotes faster ignition but does not sufficiently support complete combustion throughout the sintering bed layer. Consequently, when the oxygen concentration reaches 23%, the sintering combustion efficiency decreases to 94.4%, the sintering temperature drops, and the CO concentration in the combustion products increases. This phenomenon highlights the delicate balance between oxygen availability and combustion dynamics during sintering; insufficient oxygen results in incomplete combustion and increased CO emissions. Further oxygen concentration increases, combined with rising layer temperature, optimize the kinetic conditions for CO secondary combustion. This indicates that excess oxygen supports initial combustion and facilitates further CO oxidation to CO2 in the high-temperature regions of the sintering bed. Consequently, the sintering combustion efficiency improves, and the CO emission concentration decreases. When the oxygen concentration is increased to above 27%, the combustion efficiency exceeds 94.9%, significantly optimizing fuel utilization efficiency during sintering and reducing CO emission concentration in the sintering flue gas. This indicates a threshold oxygen concentration beyond which the benefits of enhanced combustion efficiency and reduced emissions become pronounced. These findings highlight the importance of carefully controlling oxygen levels during sintering to achieve both energy efficiency and environmental goals. This study provides valuable insights into how oxygen concentration improves combustion efficiency and reduces emissions during sintering, contributing to energy efficiency and environmental protection in industrial applications. |
| format | Article |
| id | doaj-art-d955d9ef8a344014ba6d9e7d9bc4d4a3 |
| institution | Kabale University |
| issn | 2097-4183 |
| language | zho |
| publishDate | 2025-08-01 |
| publisher | Editorial Office of Energy Environmental Protection |
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| series | 能源环境保护 |
| spelling | doaj-art-d955d9ef8a344014ba6d9e7d9bc4d4a32025-08-20T03:45:11ZzhoEditorial Office of Energy Environmental Protection能源环境保护2097-41832025-08-0139417818510.20078/j.eep.202504062025-01-09-0001Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During SinteringZhen LI0Zhengjian LIU1Jianliang ZHANG2Yaozu WANG3School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Intelligent Science and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaAgainst the backdrop of China′s "Dual Carbon", CO emission reduction technologies are crucial in the sintering process. We employed Computational Fluid Dynamics (CFD) to develop separate models for the combustion of fuel particles and for sintering machines. Numerical simulations were conducted to study the effects of oxygen concentration on fuel particle combustion and the combustion process within the sintering bed. For fuel particles, increasing oxygen concentration effectively improves conditions for complete combustion, enhances fuel combustion efficiency, and reduces CO emissions. Higher oxygen levels promote more thorough oxidation reactions, ensuring a greater proportion of fuel conversion to carbon dioxide (CO2) rather than carbon monoxide (CO). However, the influence of oxygen concentration on fuel combustion behavior during sintering is more complex. Internal fuel combustion in the sintering bed is simultaneously affected by heat transfer and oxygen concentration within the material layer. Increasing oxygen concentration leads to a lower fuel ignition point, extending the high-temperature zone and increasing oxygen consumption due to incomplete combustion. When the increase in oxygen concentration is small, the proportion of incomplete fuel combustion increases. This is because the additional oxygen initially promotes faster ignition but does not sufficiently support complete combustion throughout the sintering bed layer. Consequently, when the oxygen concentration reaches 23%, the sintering combustion efficiency decreases to 94.4%, the sintering temperature drops, and the CO concentration in the combustion products increases. This phenomenon highlights the delicate balance between oxygen availability and combustion dynamics during sintering; insufficient oxygen results in incomplete combustion and increased CO emissions. Further oxygen concentration increases, combined with rising layer temperature, optimize the kinetic conditions for CO secondary combustion. This indicates that excess oxygen supports initial combustion and facilitates further CO oxidation to CO2 in the high-temperature regions of the sintering bed. Consequently, the sintering combustion efficiency improves, and the CO emission concentration decreases. When the oxygen concentration is increased to above 27%, the combustion efficiency exceeds 94.9%, significantly optimizing fuel utilization efficiency during sintering and reducing CO emission concentration in the sintering flue gas. This indicates a threshold oxygen concentration beyond which the benefits of enhanced combustion efficiency and reduced emissions become pronounced. These findings highlight the importance of carefully controlling oxygen levels during sintering to achieve both energy efficiency and environmental goals. This study provides valuable insights into how oxygen concentration improves combustion efficiency and reduces emissions during sintering, contributing to energy efficiency and environmental protection in industrial applications.https://doi.org/10.20078/j.eep.20250406ironmakingsinteringoxygen enrichment technologyfuel combustionsintering flue gasco emission concentration |
| spellingShingle | Zhen LI Zhengjian LIU Jianliang ZHANG Yaozu WANG Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During Sintering 能源环境保护 ironmaking sintering oxygen enrichment technology fuel combustion sintering flue gas co emission concentration |
| title | Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During Sintering |
| title_full | Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During Sintering |
| title_fullStr | Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During Sintering |
| title_full_unstemmed | Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During Sintering |
| title_short | Numerical Simulation of the Impact of Oxygen Enrichment Technology on Fuel Combustion and CO Emissions During Sintering |
| title_sort | numerical simulation of the impact of oxygen enrichment technology on fuel combustion and co emissions during sintering |
| topic | ironmaking sintering oxygen enrichment technology fuel combustion sintering flue gas co emission concentration |
| url | https://doi.org/10.20078/j.eep.20250406 |
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