含水乳化燃料之液滴受熱行為與鍋爐性能研究

An Experimental Study on Droplet Heating Behaviors and Boiler Performance of Water-in-Oil Emulsions

王允利(Yun-Li Wang) ； 侯順雄(Shuhn-Shyurng Hou)林大惠(Ta-Hui Lin)

《燃燒季刊》 94期 (2016/08) Pp. 68-80

https://doi.org/10.30041/CQ.201608_(94).0006

摘要

本研究首先利用液滴懸掛實驗系統觀察分析液滴在熱環境中的受熱行為。實驗中藉由熱電偶量測受熱液滴的溫度變化及利用高速攝影機擷取影像進行觀察分析。然後再針對低硫燃料油(含水量C_w = 0%)和乳化燃料油(C_w = 20%)進行現場工業鍋爐實際測試，結果得到，含水20%乳化燃油可減少34.9 ppm的NOX排放(降低率約18%)。節能效益方面，比較未清爐情況的油耗發現，含水乳化油品供油率315 L/h，因其本身含20%的水，故實際油耗252 L/h，與低硫燃料油之油耗271 L/h相較之下，可節省19 L/h(節油率約7%)。清爐後使用C_w = 20%乳化燃油的鍋爐效率也比未清爐使用低硫燃料油(含水量C_w = 0%)提高了7.7%。

關鍵字

工業用鍋爐 ； 乳化燃油 ； 微爆 ； 二次霧化 ； 氮氧化物

並列摘要

An experimental system for observing drop heating and micro-explosion of emulsified fuel was established. An emulsified fuel of low-sulfur fuel oil with water content of 20% (C_W = 20%) and a pure low-sulfur fuel oil (C_W = 0%) were used as fuel for burning in an industrial boiler at normal operation conditions. The results showed that by using a 20% water content emulsion, the boiler efficiency can be improved by 7.7% after furnace cleaning compared to burning pure low-sulfur fuel oil without furnace cleaning, and also a reduction of 34.9 ppm (18%) of NO_X can be achieved. It was also observed that when 20% water content emulsion was used, the fuel consumption rate was 252 L/h. In other hand, fuel consumption rate was 271 L/h when pure low-sulfur fuel oil was used, so it has a reduction of 19 L/h in fuel consumption rate, corresponding to a 7% increment in energy saving (fuel saving).

並列關鍵字

Industrial boiler ； Emulsified fuel ； Micro-explosion ； Energy saving ； NOx