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量熱儀的工作原理

发布时间：2011-03-08 点击次数：1534次

目前国产量熱儀多为恒温式。其工作原理一般配是将装好煤样并充氧至规定压力的氧弹放入内筒子系统开始进行水循环，稳定水温，然后向内筒子注水，达到预定水量后，开始搅拌，量熱儀使内筒水温均衡至室温(相差不超過1. 5℃)，此時感溫控頭測定水溫並記錄到計算機中。當內筒子水溫基本穩定後，控制系統指示點火電路導通，點火後，樣品在氧氣的助燃下迅速燃燒，産生的熱量通過氧彈傳遞給內筒，引起內筒水溫上升。當氧彈內所有的熱量釋放出以後溫度開始下降，計算機檢測到內筒水溫下降信號後判定該産供銷試驗結束，系統停止攪拌並放出內筒水。計算機對采集到的溫度數據進行結果處理。

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