改善回收潤滑油品質之研究

Studies on the improvement of quality of used lubricant oil

王皓(Hao Wang)

指導教授 ： 林文崇

崑山科技大學/工程學院/環境工程研究所/碩士(2010年)

摘要

廢潤滑油的回收重煉製與再利用，在環境及經濟層面上的考量皆有正面的助益。
本研究之目的為改進合作廠商原採用的回收煉製方法，以提升再製潤滑油之品質。研究中取廢潤滑油進行離心、過濾、絮凝、減壓蒸餾及白土吸附技術以將油中瀝青及有色物質等雜質給去除掉。經本研究實驗，於適當條件下減壓蒸餾後約有68％的廢潤滑油可被回收，且色澤澄清，符合ASTM color L6.5的色度，可當成再生之潤滑油用。但蒸餾後殘留於塔底的殘渣色澤深，並可能含有許多添加劑、金屬屑以及碳渣等不純物，且大部份呈現黑色焦炭狀，已不適合利用來當成燃料油使用。
白土在適當的操作條件下可將廢潤滑油有效脫色，本專題亦進行取自廢潤滑油再煉製廠所產生之廢白土的再生研究。結果發現：經過500 ℃煅燒2小時後的再生白土，其對於廢潤滑油的優異脫色效能與新鮮白土相當。

關鍵字

廢白土 ； 廢潤滑油 ； 再生 ； 吸附

並列摘要

Re-refining and reusing used lube oils is both environmentally friendly and economical due to increasing costs of both oil and disposal.
The purpose of this study is to improve the previous recycling process for improving the quality of the recycled lube oil. In this study, we took the centrifugation, filtration, flocculation, vacuum distillation, and bleaching clay adsorption technology individually to remove the asphalt, colourings and other impurities from used lube oils. In this work, 68% of the used oil feed could be distilled overhead and recovered. The obtained distillate with ASTM color L6.5 could be used as a re-refined lube oil. The residuum looks like a black coke consisting of oil additives originally blended with the oil as well as metallic and carbon impurities. This residuum is not suited for a burner fuel. The optimal operation conditions of vacuum distillation for used oil re-refining was obtained. The properties of re-refined lube oil were also investigated.
Bleaching clay can be used to bleach the used lube oil under appropriate operating conditions. The regeneration of spent bleaching clay generated from the used-lube-oil re-refining industry has been studied. It is found that the regenerated bleaching clay obtained from calcining at 500 ℃ for 2 h has the same ability as the fresh clay in the decolorization of the used lube oil.

並列關鍵字

spent bleaching clay ； used lube oil ； extraction ； adsorption

參考文獻

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