微富氧燃燒應用於400,000 kcal/hr工業爐之燃燒行為及經濟效益

本研究將微富氧應用於400,000 kcal/hr之工業爐，在21-30％氧濃度環境下，探討燃燒空氣富氧對燃燒器之污染排放、溫度分佈以及燃料消耗之影響，所採用之燃料為6號重油。甫於增加氧濃度可減少不反應物氮氣的量，亦即煙氣量降低，故可降低排煙熱損，達到節能的效果。實驗結果顯示，在維持爐溫於1200±10℃，6％過剩空氣量之條件下，重油需求量由21％ O2 之24.0 L/hr逐步降低至30％ O2之14.4 L/hr，節能量可達40.0％以上。在NOx排放濃度方面，在30％ O2時比21％ O2增加1.84倍，但NOx總排放量則降低23％以上。在經濟效益方面，採用膜法製氧作為氧氣源，回收年限在3.5年內，具有投資效益。

關鍵字

富氧燃燒；工業爐；節能；污染排放；經濟效益

並列摘要

This experimental investigation was aimed at studying the influence of oxygen concentration of combustion air on the emissions, temperature distributions and fuel consumption between 21% O2 and 30% O2 for a 400,000 kcal/hr industrial furnace. The fuel was No. 6 heavy oil. Based on experimental results, the increase of the oxygen concentration led to less fuel consumption owing to less inert gas (N2) existence. The fuel consumption from 24.0 L/hr at 21% O2 reduced to 14.4 L/hr for enriched combustion-air at 30% O2 when the furnace temperature was maintained 1200℃±10℃. The energy saving percentage reached 40.0% above. Although the oxygen-enriched combustion may increase NOx concentration, the total NOx emission can still decrease. For example, compared with 21% O2, the NOx concentrations were increased 1.84 times for enriched combustion-air at 30% O2, however, the total NOx emissions were decreased 23% for enriched combustion-air at 30% O2. Based on economical analysis, the payback period was within 3.5 years when the oxygen source adopted the membrane spreration system.

並列關鍵字

Oxygen combustion ； industrial furnace ； energy saving ； emission ； economic benefits

國際替代計量

微富氧燃燒應用於400,000 kcal/hr工業爐之燃燒行為及經濟效益

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