稻稈固態衍生燃料成型性分析之研究

台灣農業發展興盛，而農業廢棄物的處理一直未能有妥善處理，本研究以RDF技術為主軸，以農業廢棄物的大宗-稻稈進行探討，期望可以為廢棄稻稈的處理帶來一良好貢獻。研究中首先廣泛收集參考文獻的資料，對於成型性質有影響的參數包括含水率、模具設計及成型壓力等等。剛收割之稻稈約有70%之極高含水率，不適於成型，故首先以降低稻稈含水率為主要目標進行研究，研究結果發現若將稻稈日曬於天氣晴朗的條件下，花費約2天的時間即可將稻稈含水率降低至適於成型的14%以下。由於稻稈很蓬鬆，體積龐大，故成型的目的在於方便運輸，在成型性質的研究中，探討出可成型出良好成品的最佳條件主要包括：填料量需要達到使成品密度高於1 g/cm3，含水率在8~14% 範圍內，但若超過20%將導致稻稈無法成型，而成型壓力上至少需約40 kg/cm2條件下，方可將稻稈成型成緊密且堅固的柱狀燃料塊。而含水率的不同乃為影響成品體積膨脹的最大原因，當含水率達20%以上將造成成品體積有很大幅度的膨脹。本研究中亦一併探討在製作RDF過程中，所消耗的能源，其主要目的乃因RDF產物需要先使用能源對其再製，而後於燃燒再回饋給我們能源，因此能源效益是一件重要的課題。

關鍵字

稻稈；廢棄物衍生燃料；造粒；乾燥

並列摘要

The agriculture of Taiwan developed prosperity. The treatment of agricultural wastes has been failed to deal carefully with all the time. RDF technology was used as the main shaft in this research and the agricultural wastes of rice straw carries on the discussion. The expectation can bring a good contribution for the treatment which discards the rice straw. The influential parameter of pelleting includes moisture content, mold design and pelleting pressure. The rice straw that was just gathered in nearly had 70% extremely high moisture content and was not suitable for pelleting, so regard reducing moisture content of rice straw as the main goal. The result of study found that if shines the rice straw under the fine condition on day, spend about 2 days can reduced moisture content of rice straw under 14% suitable for pelleting. Because the rice straw is very fluffy, so the purpose of pelleting lies in convenient transportation. The best pelleting condition includes mainly: it makes the density higher than 1 g/cm3 that the packing amount needs reaching, the moisture content is in 8-14% of the ranges, but if over 20% will cause the rice straw it was unable to pellet and pelleting pressure was higher than 40 kg/cm2. The difference of the moisture content is the greatest reason for influencing the volume expansion of the finished product; it will cause the volume of the finished product to have inflation by a large margin very that the moisture content is more than 20%. This research also probes into the energy consumed in the course of making RDF. The main purpose is because RDF process needs to use energy made to it, and then burning and giving us energy, so energy benefit is an important topic.

並列關鍵字

straw ； RDF ； pellet ； drying

參考文獻

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稻稈固態衍生燃料成型性分析之研究

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