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量熱儀發熱量方面的知識要點，可檢測哪幾種發熱量

发布时间：2013-03-30 点击次数：1370次

量熱儀發熱量方面的知識要點，可檢測哪幾種發熱量

为了精确的检验煤炭质量，我们可以使用相应的煤炭化验设备来检验煤炭的各项工艺性质。像：量热仪检验发热量、马弗炉检验灰分与挥发分、定硫仪检验含硫量等。这一章鹤壁市恒科仪器仪表的工作人员将给您就量热仪的使用知识进行详细的解析，帮助各位了解量热仪发热量方面的知识要点，同时对可以检验的发热量有一定的认识！
量熱儀知識1：彈筒發熱量
在量熱儀氧彈中，在有過剩的氧氣時，燃燒單位質量的試樣所産生的熱量就是彈筒發熱量。煤炭在燃燒時會産生熱量，而且隨著燃燒産物增多，溫度也會逐漸升高。因此在量熱儀的實際測定發熱量時，會通過標准樣本進行標定，即溫度每升高1K，煤和苯甲酸的燃燒熱約降低0.4～1.3J/g。。
量熱儀知識2：恒容高位發熱量
煤在工業裝置中燃燒時，煤炭中的硫只生成二氧化硫，氮則成爲遊離氮，與其在氧彈中的變化是不同的。因此，將彈筒發熱量減掉稀硫酸生成熱和二氧化硫生成熱之差以及稀硝酸的生成熱稱爲高位發熱量。
量熱儀知識3：恒容低位發熱量
工業燃燒與氧彈中燃燒還存在著一個不同的條件，那就是在彈筒發熱量測定中水分(燃燒生成的水和煤中原有的水)呈蒸汽狀態與燃燒廢氣一起排出；但是在測定恒容高位發熱量時，水蒸氣凝結成液體。如果將恒容高位發熱量減去水的蒸發熱稱爲恒容低位發熱量。
文章知識彙總：通過量熱儀的發熱量實驗，朋友們就可以直接或者間接的測出上述三種發熱量。鶴壁華通提醒大家，在使用量熱儀的時候一定要嚴格按照操作規程進行，以免影響量熱儀的測量結果。如果你想了解更多關于量熱儀使用的知識，請繼續關注我們的網站。

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