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爲什麽測定煤的熱穩定性

发布时间：2012-05-22 点击次数：1306次

煤的热稳定性是指煤在高温燃烧或者气化过程中对热的稳定性程度，也就是煤块在高温的作用下保持其粒度的性质。热稳定性好的煤在燃烧或者气化过程中不破碎或破碎比较少；热稳定性差的煤在燃烧或者气化过程中迅速裂成小块或爆裂成煤粉。这由于细粒度煤的增多，轻则增加炉内的阻力和带出物，降低气化的燃烧效率；箣破坏其整个气化过程，甚至造成停炉事故。因此，使用块煤作为气化原料时应预先测定其热稳定性，以便选择合适的煤种或改变操作条件来减少因热稳定性差而对气化过程的影响。使其运行正常。因此，煤的热稳定性是生产、科研及设计单位确定气化工艺、技术、经济指标的重要依据之一。

測定煤的熱穩定性所需的試驗設備

馬弗爐、振篩機、圓孔篩、工業天平、帶蓋坩埚、坩埚架。

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