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煤的高位低位發熱量測定原理

发布时间：2010-08-09 点击次数：1774次

煤的高位發熱量

煤的發熱量在氧彈熱量計中進行測定。一定量的分析試驗在氧彈熱量計中，在充有過量氧氣的氧彈內燃燒，氧彈熱量計的熱容量通過在相近的條件下燃燒一定量的基准量熱物苯甲酸來確定，根據試樣燃燒前後量熱系列産生的溫升，並對點火熱等附加熱進行校正後即可求得試樣的彈筒發熱量。從彈筒熱量中扣除硝酸生成熱和硫酸校正熱（硫酸與二氧化硫形成熱）之差，即得高位發熱量。

低位發熱量

煤的恒容低位發熱量和恒压低位發熱量可以通过分析试样的高位发热量计算。计算恒容低位發熱量需要知道煤样中水分和氢的含量。原则上计算恒压低位發熱量还需知道煤样中氧和氮的含量

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