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什麽叫彈筒量熱儀

发布时间：2011-12-07 点击次数：1514次

答：单位质量燃料（气态除外）在充有氧气的氧弹内（25～35个大气压左右）完全燃烧这时所释放的热量为弹桶发热量（燃烧产物的最终25℃ ）。

由于煤樣是在高壓氧氣的彈筒裏燃燒的，因此發生了煤在空氣中燃燒時不能進行的熱化學反應。如：煤中氮以及充氧氣前彈筒內空氣中的氮，在空氣燃燒時，一般呈氣態氮逸出，而在彈筒中燃燒時生成N₂O₅或NO₂等氮氧化合物。這些氮氧化合物溶于彈筒生成銷酸，這一化學反應是放熱反應。另外，煤中可燃硫在空氣中燃燒時生成SO₂氣體逸出，而在彈筒中燃燒時卻氧化成SO₃，SO₃溶于彈筒水中生成硫酸。SO₂、SO₃以及H₂SO₄溶于水生成硫酸水化物都是放熱反應。所以，煤的彈筒發熱量要高于煤在空氣中、工業鍋爐中燃燒實際上産生的熱量。爲此，實際中要把彈筒發熱量折算成符合煤在空氣中燃燒的發熱量

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