粉塵 60℃就引燃 – 中時電子報
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粉塵 60℃就引燃
2015年06月29日 04:10
中國時報 張潼/台北報導
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八仙樂園彩色派對爆炸案,根據學者分析,爆炸關鍵在於粉塵顆粒太小,本就易與空氣接觸進而燃燒;加上噴灑太過密集,只要遇到類似助長燃燒的熱源如菸蒂、火星等,都會釀成大禍。「這樣弄遲早會出事!」化學補教老師王宇指出,粉塵顆粒小,與空氣接觸的表面積大,加上事發現場粉塵濃度太高,物體迅速氧化,就會形成燃燒;且因粉塵燃點很低,只要攝氏5、60度就能引燃,因此一旦大量燃燒,就會爆炸。
粉塵 60℃就引燃 - 中時電子報
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粉塵 60℃就引燃
2015年06月29日 04:10
中國時報 張潼/台北報導
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八仙樂園彩色派對爆炸案,根據學者分析,爆炸關鍵在於粉塵顆粒太小,本就易與空氣接觸進而燃燒;加上噴灑太過密集,只要遇到類似助長燃燒的熱源如菸蒂、火星等,都會釀成大禍。「這樣弄遲早會出事!」化學補教老師王宇指出,粉塵顆粒小,與空氣接觸的表面積大,加上事發現場粉塵濃度太高,物體迅速氧化,就會形成燃燒;且因粉塵燃點很低,只要攝氏5、60度就能引燃,因此一旦大量燃燒,就會爆炸。
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活動主辦人曾稱意外肇因於風勢太大,也有人質疑是工作人員吸菸,或是舞台照明燈過熱等原因造成爆炸。政大附中化學老師張凱傑分析,癥結點仍在於粉塵「太密集」,而類似煙蒂、打火機的火星等「熱源」則是促發燃燒,而主辦單位所說的風勢,則是可能擴大爆炸的原因之一。台師大化學系教授吳家誠表示,若現場有熱源,對燃燒更有明顯助長效果;此外,因為彩色派對使用的是有染色的粉塵,有機性的染料多半也可燃,等於是在「火上澆油」。吳家誠說,彩色派對或彩色路跑「讓人很難想像」,因為路跑或狂歡時人會大力呼吸,順勢將可能帶有毒性的有色粉塵吸進肺部深處,很難排毒,不知道怎麼有民眾願意玩命嘗試?雲林科技大學環境與安全衛生工程系特聘教授徐啟銘建議,粉塵作業到處都有,包括麵粉工廠、化妝品工廠等。因此仍應測試粉塵的最低點火溫度,並拿到爆炸鋼球內做實驗,確定何謂「有效熱源」後,才能將風險儘量排除。(中國時報),