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Pulverized coal ignition delay under conventional and oxy-fuel combustion conditions
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shaddix, Christopher R. Liu, Yinhe Geier, Manfred Molina, Alejandro |
| Copyright Year | 2011 |
| Abstract | In pulverized coal (pc) burners, high velocity streams of coal particles turbulently mix with surrounding hot gases of flame products and must ignite in tens of milliseconds. Therefore, the key ignition characteristic for burner design and operation is the ignition delay of coal streams introduced into hot surroundings. To-date, most information on ignition delay has been gleaned from experiments and modeling of individual reacting coal particles, in most cases using particles substantially larger than those that dominate practical pulverized coal behavior. Although singleparticle studies are undoubtedly useful for the study of ignition and combustion of dilute particle streams, multiparticle group effects are likely important to the fl ame-holding process for practical burners. Therefore, an understanding of the ignition characteristics of a continuous flow of pulverized coal particles at different particle number densities is needed to address actual industrial practice. An improved understanding of particle stream ignition is important because it influences many aspects of pc burner performance, including NOx production, char burnout, fl ame stability, flame shape, and flame length. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ieaghg.org/docs/General_Docs/OCC2/Abstracts/Abstract/occ2Final00121.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
