探討漂洗劑對燃煤飛灰物理化學特性之影響

Investigation the Effect of Washing Reagent on the Physico-chemical Properties of Coal Fly Ash

陳文彬(Wen-Ben Chen)

指導教授 ： 黃武章

國立屏東科技大學/工學院/環境工程與科學系所/碩士(2008年)

https://doi.org/10.6346/NPUST.2008.00168

摘要

燃煤飛灰為燃煤發電之空污防治廢棄物，由於產生量日益龐大且無害，目前飛灰已由工業廢棄物轉變成廣被接受和使用的混凝土礦物摻料。由於飛灰可改善傳統混凝土的缺陷。但飛灰的性質受到煤源、燃燒系統、操作條件和環境因素等影響，使其品質不易穩定，因而產生不同色澤與品質之飛灰。
本研究方向為探討不同漂洗劑漂洗飛灰物理化學性質之影響，利用水及丙酮兩種漂洗劑，針對汽電共生廠及火力發電廠之飛灰進行漂洗處理，比較經漂洗後飛灰之性質差異。結果顯示，飛灰經過丙酮漂洗後的確能去除飛灰中油份並提升< #500mesh號篩留篩率15~20%，亦增加混凝土抗壓強度約15kg/cm2等效益。在經濟效益分析上，也證明丙酮比水更適合作為飛灰之漂洗劑。

關鍵字

飛灰 ； 丙酮 ； 漂洗 ； 物理化學特性

並列摘要

Coal fly ash is generated from the air-pollution control devices of coal-burn electric-generation plants. Because the producing amount is huge day by day, and non-hazardous, coal fly ash has already changed into a additive industrial waste into a mineral additive of concrete, to improve the defect of the traditional concrete. The nature of the coal fly ash is influenced by the coal source, system of burning, operating conditions and environmental factor etc, resulted in a unstable quality and various appearent color of coal fly ash. This research focused on the effect of different washing reagent on physico-chemical property of washed ash. In this study, for the ashes were collected from the coal-fired and oil-fired plants. Results indicate that the washing treatment actually improves the compression strength of acetone-washed ash concrete by 15 kg/cm2, and reduces the oil content. In addition the residual percentage of <#500 mesh sieve has increased to be 15~20%. The economic analysis also illustrated that acetone is a better washing reagent that water for coal fly ash.

並列關鍵字

Coal fly ash ； acetone ； washing ； physico-chemical property

參考文獻

團法人台灣營建研究院，第17-50頁。

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