臺灣博碩士論文加值系統

燃料重組器為現今許多製氫方法中非常重要的技術之一，重組器是一個可以將高汙染燃料或其他再生能源經重組反應轉化為富氫重組氣的反應器。本研究將重點放在工業用中小型鍋爐之柴油燃燒器，使用氣體鋼瓶模擬近似於富氫重組氣的比例(氫氣70%、二氧化碳20%及一氧化碳10%)，將富氫混合燃氣噴注於柴油燃燒器火焰不同位置，透過ICCD camera拍攝火焰自然螢光影像，熱電偶量測火焰溫度，以及氣體分析儀量測燃燒排放氣體，以探討火焰特性的變化。實驗結果顯示，噴注富氫燃氣在燃燒器上游後，火焰峰溫會上升，NOx的濃度也上升，但CO的濃度有略微下降。若噴注速度過快，噴注氣流可能會影響漩渦火焰流場結構，造成火焰燃燒不完全，使得CO濃度提高。當噴注富氫燃氣於燃燒器火焰下游時，火焰中的高溫區域延長，CO的濃度下降，而NOx的濃度只有些微的上升。

Fuel reforming is an important technology to convert high pollution fuels and renewable energy source into hydrogen-rich reforming gas. This research focuses to study the effect of addition of hydrogen-rich reforming gas into a small-size, industrial diesel burner. The prepared hydrogen-rich reforming gas (70% hydrogen/20% carbon dioxide/10% carbon monoxide) is injected into swirling diesel flame at different positions. The measured temperature profile of flame as well as the flame natural fluorescence images of OH, CH, C2, and flame itself are taken and analyzed. The results show that the peak temperature rises when injecting hydrogen-rich fuel gas at the upstream to allow the gas sufficiently mix with diesel fuel, and that also routes to an increase of NOx emission and slightly decrease of CO emission. However, when gas injection velocity is too fast, the jet may influence the structure of the swirling flame and causes incomplete combustion of injected CO. When injection of hydrogen-rich fuel gas into downstream of the swirling flame, the high temperature zone of flame extends, and the concentration of carbon monoxide decreases with an insignificant NOx concentration rise.

摘要 I
目錄 V
表目錄 VII
圖目錄 VIII
符號說明 XI
第一章 緒論 1
1.1前言 1
1.2研究動機與目的 2
1.3文獻回顧 3
第二章 實驗設備與實驗方法 4
2.1柴油燃燒器 4
2.2漩渦火焰 4
2.3富氫混合燃氣供應系統 6
2.4溫度分布量測 6
2.5火焰自然螢光拍攝 7
2.6排放廢氣分析 7
第三章 實驗結果及討論 9
3.1原始火焰特性分析 9
3.2不同空燃比分析 12
3.3噴注富氫燃氣分析 14
第四章 結論與未來工作 19
4.1結論 19
4.2未來工作 21
參考文獻 22

[1]Jinhua, W., Zuohua, H., Chenglong, T., Haiyan, M.,Xibin, W., 2009, “Numerical study of the effect of hydrogen addition on methane-air mixture combustion, pp.1084-1096
[2]Fabien, H., Christian, C., 2007 “Characterization of the effects of hydrogen addition in premixed methane/air flames,pp.2585-2592
[3]李仲何,2010“超級柴油加氫對直噴式柴油引擎性能、廢氣排放和燃燒特性之研究台北科技大學碩士論文
[4]Cheng, T. S., Chao,Y. C., Wu, D. C., Yuan, T., LU, C. C., Cheng, C. K. and Chang, J, M., 1998, “Effects of Fuel-Air mixing on Flames Structures and NOx Emissions in a Swirling Methane Jet Flame, 27th Symposium(International) on Combustion, The Combustion Institute, Pittsburgh, pp.1229-1237
[5]Gupta,A.K., Lilley, D.G. and Syred, N. 1984, Swirl Flows, Abacus Press, Tunbridge Wells, England
[6]Tangirala, V., and Driscoll, J. F., 1988,“Temperatures within Non-premixed Flames: Effects of Rapid Mixing Due to Swirl, Cob Sci. Tech., Vol. 60, pp.143-162