本文選題：安全工程　切入點：煤質(zhì)粉末活性炭　出處：《安全與環(huán)境學(xué)報》2017年02期 　論文類型：期刊論文

【摘要】：針對煤質(zhì)粉末活性炭最顯著的熱危險特性——自燃危險性進行試驗。采用粉塵層最低著火溫度測定系統(tǒng)對煤質(zhì)粉末活性炭進行自燃試驗,測定煤質(zhì)粉末活性炭的最低著火溫度;采用SDT Q600熱重分析儀測定煤質(zhì)粉末活性炭在氮氣和空氣氣氛中以20℃/min的速率升溫至700℃時的熱解和燃燒特性,通過TG/DTG曲線計算其著火溫度,并進行熱穩(wěn)定性評價。粉塵層自燃試驗結(jié)果表明,煤質(zhì)粉末活性炭最低著火溫度為400℃,具有自燃危險性,易形成陰燃;氮氣氣氛中熱解試驗表明,熱解過程經(jīng)歷了室溫~120.0℃和280.0~700.0℃兩次輕緩失重階段,646.44℃時揮發(fā)分熱失重速率最大,對應(yīng)熱失重速率峰值為0.082 6%/℃,自燃危險性較低;空氣氣氛中燃燒試驗表明,燃燒過程經(jīng)歷了室溫~95.5℃和300.0~600.0℃兩次劇烈失重階段,分別為吸附水分受熱蒸發(fā)和氧化生成的有機官能團分解脫附導(dǎo)致,565.35℃時揮發(fā)分熱失重速率最大,對應(yīng)熱失重速率峰值為13.20%/min,粉末較強的氧氣吸附效應(yīng)和較低的導(dǎo)熱系數(shù)導(dǎo)致其自燃傾向較高,火災(zāi)危險性較大。
[Abstract]:According to the most obvious thermal hazard characteristic of coal powdered activated carbon (PAC), the spontaneous combustion risk was tested by the dust layer minimum ignition temperature measurement system, and the minimum ignition temperature of coal powdered activated carbon was measured. SDT Q600 thermogravimetric analyzer was used to determine the pyrolysis and combustion characteristics of coal powdered activated carbon at the rate of 20 鈩，

本文編號：1573272