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頁籤選單縮合
題名 | Recovery of Gasoline Vapor by a Combined Process of Two-Stage Dehumidification and Condensation=利用兩階段除濕與冷凝程序回收油氣之研究 |
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作者姓名(中文) | 謝哲隆; 呂辰宇; 張慶源; 邱浚佑; 李篤中; 劉希平; 張章堂; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 34:6 2003.11[民92.11] |
頁次 | 頁605-616 |
分類號 | 457.6 |
關鍵詞 | 油氣回收; 加油站; Gasoline vapor; Dehumidification; Condensation; |
語文 | 英文(English) |
中文摘要 | 加油站油氣所含揮發性有機化合物(VOCs)之逸散已成為人口密集地區的一種重要污染問題。本研究指出一兩階段除濕和冷凝(TSDC)結合之程序作為回收逸散油氣中VOCs之方法。除濕程序分為兩階段,第一階段以除濕機控制在4°C以移除67 wt%進流油氣中之水氣;第二階段更進一步以吸附裝置增進此值到95 wt%,此可避免下一階段冷凝出現結冰阻塞問題。依據VOCs排放或削減法規規範,藉控制冷凝器於適當之低溫,可回收液體汽油。為模擬於各不同溫度下冷凝回收油氣中之VOCs,本研究使用Aspen科技公司所發展之熱動力學套裝軟體Aspen-plus作為模擬工具。模擬結果指出,冷凝溫度分別為-40、-60和-73°C時,TSDC程序進流油氣中VOCs冷凝回收效率(Rc,依據進入TSDC程序之油氣濃度與流量)分別為73、85和90 wt%,於溫度為-60°C時,即可符合VOCs非破壞性削減率85 wt%。於溫度為-60°C時,即可符合VOCs非破壞性削減率85 wt%之要求。若此化學工廠儲油糟的嚴格規範應用到加油站,則冷凝器操作於-60°C時須迴流部分冷凝器出流蒸氣回地下油糟。此乃為確保再加1L汽油入油箱時 VOCs逸散小於35 mg。另外,迴流油氣亦可平衡抽出汽油地下油槽壓力。 |
英文摘要 | The emission of gasoline vapor containing volatile compounds (VOCs) from gasoline service stations is becoming a significant environmental problem especially for the population densed area. A combined process of two-stage dehumidification and condensation (TSDC) is proposed as a method of recovery of VOCs from the emitted gasoline vapor. A two-stage dehumidification procedure, consisting of using a first-stage dehumidifier (at 4°C with removal efficiency of water of vapor, Rwi of about 67 wt%) and a second-stage adsorber (enhancing the Rwi to about 95 wt%0, can be employed to remove most of water of vapor thus avoiding the possible icing problem for the subsequent condensation. Salable liquid gasoline can then be recovered by operating the condenser at the desired low temperature Tc depending on the emission and/or reduction regulation of VOCs. Aspen-plus, a software package for thermodynamic computation developed by Aspen Technology Inc., is used to simulate the condensation removal or recovery efficiencies of condenser (Rc, based on the inlet gasoline vapor entering the condenser) of VOCs at various Tc. The simulation results indicate that the values of Rc are about 73, 85, and 90 wt% at Tc of -40, -60 and -73°C, respective. Thus, the operation of condenser at Tc of -60°C would meet the non-destructive reduction of VOCs at 85 wt% level. However, should the stringent regulation on the oil storage tank of chemical plant be applied to the gasoline service station, then the condenser operated at Tc of -60°C would have to recycle part of the outlet vapor from the condenser back into the undergrounded gasoline tank. This is to ensure that the emission of VOCs is less than 35 mg for refueling 1 L gasoline into the fuel tank of vehicle. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。