沼氣水洗脫硫效率的影響因子

沼氣是一種再生能源，但含有硫化氫氣體，在利用前未經脫硫會損壞機器設備，而硫化氫易溶於水，因此本研究以水作為吸附劑，設計沼氣水洗脫硫系統，用以減少沼氣中的硫化氫含量。沼氣藉由幫浦輸送進入洗滌圓柱底部的曝氣盤，產生許多細微沼氣氣泡與洗滌圓柱內的水加速反應，使更多量硫化氫溶解於水中。洗滌圓柱中改變不同的水位高度及沼氣流量進行試驗，進一步比較不同流量的內水循環系統，檢測沼氣經水洗後隨測試時間其硫化氫濃度變化，分析探討沼氣的硫化氫去除率變化。由試驗結果顯示，硫化氫去除率隨著水位高度的增加而提高，而隨著沼氣流量的增加而降低，高流量的內循環水有較佳的硫化氫去除率。沼氣經由水洗可以有效減少沼氣中的硫化氫濃度，但洗滌圓柱中水的吸附能力會隨時間的遞增而逐漸飽和。此沼氣水洗脫硫系統操作方便且成本低，適用於小型養豬場以淨化沼氣品質。

關鍵字

沼氣；硫化氫；水洗；脫硫

並列摘要

Biogas, a renewable energy, contains hydrogen sulfide (H_2S) which is a hazardous, eroding gas to biogas utilization facilities. Hydrogen sulfide can easily dissolve in water. Thus, we developed a water scrubbing system to remove the hydrogen sulfide from biogas. The scrubbing system consists of an aerating disc at the bottom of a water column. The aerator disintegrates biogas into numerous tiny gas bubbles to increase contact area and hence the possibility of dissolving. The water level of the scrubbing column, the feed rate of biogas, and the rate of water circulation were tuned for optimum de-sulfurization. The efficacy of de-sulfurization was proportional to the water level and to the rate of water circulation, but inversely proportional to the feed rate of biogas. The hydrogen sulfide in biogas can be effectively removed by water - scrubbing the biogas. The de-sulfurization capability of the circulating water was saturated as the time passes. The system is adequate for a small hog farm as a compromise between affordability and performance of de-sulfurization.

並列關鍵字

Biogas ； Hydrogen sulfide ； Water scrubbing ； De-sulfurization

國際替代計量

沼氣水洗脫硫效率的影響因子

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