Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton Stalk
With the rapid development of renewable energy, the co-combustion of Zhundong coal and biomass has attracted more and more attention. However, the high content of alkali metals in Zhundong coal and biomass leads to serious slagging and fouling in the co-combustion process. In this study, cotton stra...
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MDPI AG
2025-06-01
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| author | Tianyou Li Ning Liu Kunpeng Liu Bo Wei Jianjiang Wang Feng Wang Yanjie Qi Ning Chen |
| author_facet | Tianyou Li Ning Liu Kunpeng Liu Bo Wei Jianjiang Wang Feng Wang Yanjie Qi Ning Chen |
| author_sort | Tianyou Li |
| collection | DOAJ |
| description | With the rapid development of renewable energy, the co-combustion of Zhundong coal and biomass has attracted more and more attention. However, the high content of alkali metals in Zhundong coal and biomass leads to serious slagging and fouling in the co-combustion process. In this study, cotton straw was selected for co-combustion with Zhundong coal. The ash deposition model was established according to the melting ration calculated by Factsage, and the ash deposition characteristics during the co-combustion of Zhundong coal and cotton stalks in the actual boiler were explored by Fluent. The results showed that the K<sub>2</sub>O content in ash increased from 0.31% to 9.31% with the increase in the blending ratio, while the contents of other components had no significant changes. In addition, with the increase in the blending ratio, the ash deposition rate increased from 0.00327 kg/(m<sup>2</sup>·s) to 0.00581 kg/(m<sup>2</sup>·s), an increase of 77.6%. The reduction in the tangential circle diameter obviously alleviated the ash deposition on the wall. When the tangential circle diameter was reduced to 400 mm, the ash deposition rate was 0.00207 kg/(m<sup>2</sup>·s), which was 37.6% lower than the original condition. |
| format | Article |
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| issn | 2076-3417 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-6c9a27d4bc8d4d4c8e0debf2b4e408322025-08-20T02:35:51ZengMDPI AGApplied Sciences2076-34172025-06-011513696310.3390/app15136963Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton StalkTianyou Li0Ning Liu1Kunpeng Liu2Bo Wei3Jianjiang Wang4Feng Wang5Yanjie Qi6Ning Chen7Xinjiang Xinye State-Owned Property Management (Group) Co., Ltd., Urumqi 830026, ChinaState Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resource, Xinjiang University, Urumqi 830017, ChinaState Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resource, Xinjiang University, Urumqi 830017, ChinaState Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resource, Xinjiang University, Urumqi 830017, ChinaState Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resource, Xinjiang University, Urumqi 830017, ChinaXinjiang Xinye State-Owned Property Management (Group) Co., Ltd., Urumqi 830026, ChinaState Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resource, Xinjiang University, Urumqi 830017, ChinaXinjiang Xinye Science and Technology Innovation Research Institute Co., Ltd., Urumqi 830023, ChinaWith the rapid development of renewable energy, the co-combustion of Zhundong coal and biomass has attracted more and more attention. However, the high content of alkali metals in Zhundong coal and biomass leads to serious slagging and fouling in the co-combustion process. In this study, cotton straw was selected for co-combustion with Zhundong coal. The ash deposition model was established according to the melting ration calculated by Factsage, and the ash deposition characteristics during the co-combustion of Zhundong coal and cotton stalks in the actual boiler were explored by Fluent. The results showed that the K<sub>2</sub>O content in ash increased from 0.31% to 9.31% with the increase in the blending ratio, while the contents of other components had no significant changes. In addition, with the increase in the blending ratio, the ash deposition rate increased from 0.00327 kg/(m<sup>2</sup>·s) to 0.00581 kg/(m<sup>2</sup>·s), an increase of 77.6%. The reduction in the tangential circle diameter obviously alleviated the ash deposition on the wall. When the tangential circle diameter was reduced to 400 mm, the ash deposition rate was 0.00207 kg/(m<sup>2</sup>·s), which was 37.6% lower than the original condition.https://www.mdpi.com/2076-3417/15/13/6963Zhundong coalcotton stalkash deposition characteristicsnumerical simulation |
| spellingShingle | Tianyou Li Ning Liu Kunpeng Liu Bo Wei Jianjiang Wang Feng Wang Yanjie Qi Ning Chen Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton Stalk Applied Sciences Zhundong coal cotton stalk ash deposition characteristics numerical simulation |
| title | Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton Stalk |
| title_full | Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton Stalk |
| title_fullStr | Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton Stalk |
| title_full_unstemmed | Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton Stalk |
| title_short | Study on the Ash Deposition Characteristics for Co-Combustion of Zhundong Coal with Cotton Stalk |
| title_sort | study on the ash deposition characteristics for co combustion of zhundong coal with cotton stalk |
| topic | Zhundong coal cotton stalk ash deposition characteristics numerical simulation |
| url | https://www.mdpi.com/2076-3417/15/13/6963 |
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