In this research a modified commercial boiler,which burns diesel oil,is used to study the combustion characterisics and the pollution of the exhausting products under various operating conditions.The controlling ranges of the various experimental parameters include equivalence ratio from 0.8to1.1,swirl number 0 and 0.6, the flue rate of the recirculated flue gas from 0% to 12%, and jet spray angle 80. The effect of the above various operating conditions on the combustion characteristics and the formation of pollutants are studied in this research. A photographic technology is used to study the combustion behaviors of the flame under various operating condition.
Flame structures display that when the flow rate of the recirculated flue gas increase, the flame color in primary combustion zone will change gradually from high temperature white-yellow flame to low temperature orange-red flame. At plate angle 0 and 45, the primary combustion zone with plate angle 45 occurs near burner so that we cannot see too much white-yellow zone from quartz window. The flame outside of the primary combustion region exhibits the red color which is due to the radition of CO2 and water vapor. In addition, when the strength of the swirl increases the contour of the flame will change gradually from smooth shape to strongly distortion.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0706100-151102 |
| Date | 06 July 2000 |
| Creators | Chou, Ming-Fuei |
| Contributors | Yang Ru, Long-jeng Chen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706100-151102 |
| Rights | unrestricted, Copyright information available at source archive |
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