Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed
The existence of stagnant particle layer in the conventional non-mechanical valves limits their utilization in CFB with the feedstock of caking particles. A new N-valve consisted of a fluidized weir chamber with bottom aeration and a moving-bed angled standpipe with side aeration was developed to el...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/56234 |
| _version_ | 1848759821059227648 |
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| author | Dong, Li Ji, W. Zhao, Z. Xu, G. |
| author_facet | Dong, Li Ji, W. Zhao, Z. Xu, G. |
| author_sort | Dong, Li |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The existence of stagnant particle layer in the conventional non-mechanical valves limits their utilization in CFB with the feedstock of caking particles. A new N-valve consisted of a fluidized weir chamber with bottom aeration and a moving-bed angled standpipe with side aeration was developed to eliminate the stagnant particle layer and reach high solids circulation rate G s in CFBs. The particle flow behavior and its control in the N-valve were studied experimentally. By combining the bottom aeration for weir chamber and the side aeration for angled standpipe the G s over 270 kg/(m 2 s) was achieved, and the stagnant particle layer completely disappeared. The G s increased with increasing the side aeration gas flow rate Q sa , and this loosing gas flow was optimally injected from the bend between the downcomer and the angled standpipe. At a constant but enough high Q sa , the increase in the bottom aeration gas flow rate Q ba elevated G s linearly. © 2014 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder. |
| first_indexed | 2025-11-14T10:05:58Z |
| format | Journal Article |
| id | curtin-20.500.11937-56234 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:05:58Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-562342017-09-13T16:11:34Z Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed Dong, Li Ji, W. Zhao, Z. Xu, G. The existence of stagnant particle layer in the conventional non-mechanical valves limits their utilization in CFB with the feedstock of caking particles. A new N-valve consisted of a fluidized weir chamber with bottom aeration and a moving-bed angled standpipe with side aeration was developed to eliminate the stagnant particle layer and reach high solids circulation rate G s in CFBs. The particle flow behavior and its control in the N-valve were studied experimentally. By combining the bottom aeration for weir chamber and the side aeration for angled standpipe the G s over 270 kg/(m 2 s) was achieved, and the stagnant particle layer completely disappeared. The G s increased with increasing the side aeration gas flow rate Q sa , and this loosing gas flow was optimally injected from the bend between the downcomer and the angled standpipe. At a constant but enough high Q sa , the increase in the bottom aeration gas flow rate Q ba elevated G s linearly. © 2014 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder. 2014 Journal Article http://hdl.handle.net/20.500.11937/56234 10.1016/j.apt.2014.02.021 Elsevier restricted |
| spellingShingle | Dong, Li Ji, W. Zhao, Z. Xu, G. Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed |
| title | Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed |
| title_full | Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed |
| title_fullStr | Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed |
| title_full_unstemmed | Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed |
| title_short | Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed |
| title_sort | elimination of stagnant particles from a n-valve with side aeration in circulating fluidized bed |
| url | http://hdl.handle.net/20.500.11937/56234 |