Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis
Experimental investigations into the combustion behaviors of single pulverized coal particles are carried out based on high-speed imaging and image processing techniques. A high-speed video camera is employed to acquire the images of coal particles during their residence time in a visual drop tube f...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Published: |
Elsevier
2017
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/41328/ |
| _version_ | 1848796249811058688 |
|---|---|
| author | Bai, Xiaojing Lu, Gang Bennet, Tom D. Sarroza, Archi C. Eastwick, Carol Liu, Hao Yan, Yong |
| author_facet | Bai, Xiaojing Lu, Gang Bennet, Tom D. Sarroza, Archi C. Eastwick, Carol Liu, Hao Yan, Yong |
| author_sort | Bai, Xiaojing |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Experimental investigations into the combustion behaviors of single pulverized coal particles are carried out based on high-speed imaging and image processing techniques. A high-speed video camera is employed to acquire the images of coal particles during their residence time in a visual drop tube furnace. Computer algorithms are developed to determine the characteristic parameters of the particles from the images extracted from the videos obtained. The parameters are used to quantify the combustion behaviors
of the burning particle in terms of its size, shape, surface roughness, rotation frequency and luminosity. Two sets of samples of the same coal with different particle sizes are studied using the techniques developed. Experimental results show that the coal with different particle sizes exhibits distinctly different combustion behaviors. In particular, for the large coal particle (150–212 lm), the combustion of volatiles and char takes place sequentially with clear fragmentation at the early stage of the char combustion.
For the small coal particle (106–150 lm), however, the combustion of volatiles and char occurs simultaneously
with no clear fragmentation. The size of the two burning particles shows a decreasing trend with
periodic variation attributed to the rapid rotations of the particles. The small particle rotates at a frequency
of around 30 Hz, in comparison to 20 Hz for the large particle due to a greater combustion rate.
The luminous intensity of the large particle shows two peaks, which is attributed to the sequential combustion
of volatiles and char. The luminous intensity of the small particle illustrates a monotonously decreasing trend, suggesting again a simultaneous devolatilization/volatile and char combustion. |
| first_indexed | 2025-11-14T19:44:59Z |
| format | Article |
| id | nottingham-41328 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:44:59Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-413282020-05-04T18:37:48Z https://eprints.nottingham.ac.uk/41328/ Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis Bai, Xiaojing Lu, Gang Bennet, Tom D. Sarroza, Archi C. Eastwick, Carol Liu, Hao Yan, Yong Experimental investigations into the combustion behaviors of single pulverized coal particles are carried out based on high-speed imaging and image processing techniques. A high-speed video camera is employed to acquire the images of coal particles during their residence time in a visual drop tube furnace. Computer algorithms are developed to determine the characteristic parameters of the particles from the images extracted from the videos obtained. The parameters are used to quantify the combustion behaviors of the burning particle in terms of its size, shape, surface roughness, rotation frequency and luminosity. Two sets of samples of the same coal with different particle sizes are studied using the techniques developed. Experimental results show that the coal with different particle sizes exhibits distinctly different combustion behaviors. In particular, for the large coal particle (150–212 lm), the combustion of volatiles and char takes place sequentially with clear fragmentation at the early stage of the char combustion. For the small coal particle (106–150 lm), however, the combustion of volatiles and char occurs simultaneously with no clear fragmentation. The size of the two burning particles shows a decreasing trend with periodic variation attributed to the rapid rotations of the particles. The small particle rotates at a frequency of around 30 Hz, in comparison to 20 Hz for the large particle due to a greater combustion rate. The luminous intensity of the large particle shows two peaks, which is attributed to the sequential combustion of volatiles and char. The luminous intensity of the small particle illustrates a monotonously decreasing trend, suggesting again a simultaneous devolatilization/volatile and char combustion. Elsevier 2017-03-14 Article PeerReviewed Bai, Xiaojing, Lu, Gang, Bennet, Tom D., Sarroza, Archi C., Eastwick, Carol, Liu, Hao and Yan, Yong (2017) Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis. Experimental Thermal and Fluid Science, 85 . pp. 322-330. ISSN 0894-1777 Pulverized coal particles Drop tube furnace High-speed imaging Image processing Combustion behaviors http://www.sciencedirect.com/science/article/pii/S089417771730081X doi:10.1016/j.expthermflusci.2017.03.018 doi:10.1016/j.expthermflusci.2017.03.018 |
| spellingShingle | Pulverized coal particles Drop tube furnace High-speed imaging Image processing Combustion behaviors Bai, Xiaojing Lu, Gang Bennet, Tom D. Sarroza, Archi C. Eastwick, Carol Liu, Hao Yan, Yong Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis |
| title | Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis |
| title_full | Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis |
| title_fullStr | Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis |
| title_full_unstemmed | Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis |
| title_short | Combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis |
| title_sort | combustion behavior profiling of single pulverized coal particles in a drop tube furnace through high-speed imaging and image analysis |
| topic | Pulverized coal particles Drop tube furnace High-speed imaging Image processing Combustion behaviors |
| url | https://eprints.nottingham.ac.uk/41328/ https://eprints.nottingham.ac.uk/41328/ https://eprints.nottingham.ac.uk/41328/ |