Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon block
Fluoride is a toxic and harmful ingredient in the spent cathode carbon blocks (SCCB). Gaseous fluoride pollution is a significant potential pollution source in the process of boiler collaborative disposal of SCCB. In this paper, meager coal and SCCB were used as fuel, the mixing ratio and temperatur...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535223009784 |
| _version_ | 1827382539640111104 |
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| author | Jigang Zhang Zijun Liu Yi Wang Kuihua Han Zhaocai Teng |
| author_facet | Jigang Zhang Zijun Liu Yi Wang Kuihua Han Zhaocai Teng |
| author_sort | Jigang Zhang |
| collection | DOAJ |
| description | Fluoride is a toxic and harmful ingredient in the spent cathode carbon blocks (SCCB). Gaseous fluoride pollution is a significant potential pollution source in the process of boiler collaborative disposal of SCCB. In this paper, meager coal and SCCB were used as fuel, the mixing ratio and temperature were variables, the law of thermal conversion of fluorine during the co-combustion process was studied, and the properties of ash residue were discussed. At the same time, CaO was added to the furnace to reveal the influence of temperature on the effect of fluorine fixation in the furnace. The results showed that combustion was the most suitable method for removing soluble fluorine from SCCB, and the thermal conversion rate of soluble fluorine was up to 99.68–99.98%. The higher the combustion temperature, the higher the conversion of gaseous fluoride, and the worse the effect of fluorine fixation in the furnace. It is not suitable for fluorine fixation in the furnace when the furnace temperature exceeded 1100 ℃. The higher the mixing ratio of SCCB, the higher the production of gaseous fluoride, and a proper mixing ratio is vital for co-combustion. Ash residue after mixing 10% SCCB combustion belongs to general industrial solid waste. This study has important theoretical significance for determining the applicable furnace type, the appropriate mixing ratio and effective fluoride treatment measures in the co-combustion process of coal and SCCB. |
| first_indexed | 2024-03-08T14:20:56Z |
| format | Article |
| id | doaj.art-3fe291c8a44045aa9e50293530034dcc |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-03-08T14:20:56Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-3fe291c8a44045aa9e50293530034dcc2024-01-14T05:37:45ZengElsevierArabian Journal of Chemistry1878-53522024-02-01172105516Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon blockJigang Zhang0Zijun Liu1Yi Wang2Kuihua Han3Zhaocai Teng4Shandong Institute of Commerce and Technology, Jinan 250103, ChinaShandong Engineering Laboratory for High-efficiency Energy Conservation and Energy Storage Technology & Equipment, School of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaState Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaShandong Engineering Laboratory for High-efficiency Energy Conservation and Energy Storage Technology & Equipment, School of Energy and Power Engineering, Shandong University, Jinan 250061, China; Corresponding author at: No.17923 Jingshi Road, Lixia District, Jinan, Shandong Province 250061, China.Shandong Engineering Laboratory for High-efficiency Energy Conservation and Energy Storage Technology & Equipment, School of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaFluoride is a toxic and harmful ingredient in the spent cathode carbon blocks (SCCB). Gaseous fluoride pollution is a significant potential pollution source in the process of boiler collaborative disposal of SCCB. In this paper, meager coal and SCCB were used as fuel, the mixing ratio and temperature were variables, the law of thermal conversion of fluorine during the co-combustion process was studied, and the properties of ash residue were discussed. At the same time, CaO was added to the furnace to reveal the influence of temperature on the effect of fluorine fixation in the furnace. The results showed that combustion was the most suitable method for removing soluble fluorine from SCCB, and the thermal conversion rate of soluble fluorine was up to 99.68–99.98%. The higher the combustion temperature, the higher the conversion of gaseous fluoride, and the worse the effect of fluorine fixation in the furnace. It is not suitable for fluorine fixation in the furnace when the furnace temperature exceeded 1100 ℃. The higher the mixing ratio of SCCB, the higher the production of gaseous fluoride, and a proper mixing ratio is vital for co-combustion. Ash residue after mixing 10% SCCB combustion belongs to general industrial solid waste. This study has important theoretical significance for determining the applicable furnace type, the appropriate mixing ratio and effective fluoride treatment measures in the co-combustion process of coal and SCCB.http://www.sciencedirect.com/science/article/pii/S1878535223009784Meager coalSpent cathode carbon blockCo-combustionThermal conversion of fluorineFluorine fixation |
| spellingShingle | Jigang Zhang Zijun Liu Yi Wang Kuihua Han Zhaocai Teng Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon block Arabian Journal of Chemistry Meager coal Spent cathode carbon block Co-combustion Thermal conversion of fluorine Fluorine fixation |
| title | Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon block |
| title_full | Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon block |
| title_fullStr | Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon block |
| title_full_unstemmed | Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon block |
| title_short | Study on thermal conversion and detoxification mechanism of fluorine during co-combustion of meager coal and spent cathode carbon block |
| title_sort | study on thermal conversion and detoxification mechanism of fluorine during co combustion of meager coal and spent cathode carbon block |
| topic | Meager coal Spent cathode carbon block Co-combustion Thermal conversion of fluorine Fluorine fixation |
| url | http://www.sciencedirect.com/science/article/pii/S1878535223009784 |
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