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題 名 | 拖車式乾燥機乾燥落花生之研究=Drying Peanuts in a Trailer-Type Dryer |
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作 者 | 楊江益; 馮丁樹; | 書刊名 | 農業工程學報 |
卷 期 | 43:1 1997.03[民86.03] |
頁 次 | 頁61-69 |
分類號 | 434.25 |
關鍵詞 | 落花生; 乾燥; 拖車式; Peanuts; Drying; Trail-type; |
語 文 | 中文(Chinese) |
中文摘要 | 落花生為臺灣重要的雜糧作物之一,但乾燥機的使用仍然不甚普遍,以致於常因 乾燥及儲藏不良而發霉,引起黃麴毒素的污染。本研究主要在探討落花生在拖車式乾燥機中 進行乾燥時之乾燥特性。 以 45 ℃之熱風溫度,0.31m/s 之平均乾燥風速,對 118 公分的 花生層深度分下、中、上三層以及近風口、中間風口、遠風口三處之水分與溫度變化進行實 驗分析。另以乾燥拖車進行乾燥實驗,探討不同花生層厚度對風量固定在 220CMM 及熱風溫 度 45 ℃時的乾燥速率之影響。結果發現:118 公分的花生層厚度其上、下層之水分變化差 異太大,易造成乾燥效果不均勻。 有關風量對乾燥速率的影嚮,經室內乾燥試驗結果,若將熱風溫度設定在 40 ℃左右,乾燥 之平均風速即使提升至 0.44 及 0.48m/s 的風速,不僅兩者結果並無顯著的差異, 其乾燥 速率與拖車以 0.38m/s 之平均風速乾燥比較,亦無明顯加快。 實驗結果顯示,以拖車式乾 燥機乾燥落花生時, 在穀層深度不超過 80 公分下,以 45 ℃的熱風溫度以及 0.31m/s 的 平均風速,皆可在 48 小時左右完成乾燥,這是相當可行的乾燥條件設定。落花生在乾燥前 若加以濾土處理則乾燥效果會更好。 |
英文摘要 | Peanut is one of the important crops in Taiwan, but more acceptable dryers for peanuts are still to be developed. Normally, incorrect drying and curing always result in mold growth and high contamination of aflatoxin in the grains during storage. A study on drying characteristics of peanuts in a trailer type dryer was investigated at an air temperature of 45 ℃ and air flow rate of 220 CMM for a depth of 118cm. Effects of air temperature and drying rate on various layers of peanuts were evaluated. Distribution of air temperature, velocity and peanut moisture contents during drying were measured and discussed. Drying peanuts of 118 cm in depth has shown that high moisture gradients exist in the grain layers. The air speed ranging from 0.38m/s to 0.48m/s had only little effect on the drying results. With an air temperature of 45 ℃ controlled to dry through a depth less than 80cm, the quality of the dried peanuts was found highly acceptable to the most local farmers. However, it is most recommended that extra separation operation was needed to remove the attached dirt before peanuts were put in the trailer dryer for drying. |
本系統中英文摘要資訊取自各篇刊載內容。