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煤炭化驗中煤中水分對火電生產運行有何影響?

2016-01-15  來自: 鶴壁市華維科力煤質儀器有限公司 瀏覽次數:2546

煤中水分不能燃燒,煤中水分越高,可燃物就相對減少,發熱量降低,而且在燃燒時水分蒸發還要吸收一部分熱量,lkg 水分,大約要消耗2.5MJ的熱量,由于水分蒸發消耗大量熱量,導致爐膛溫度下降,煤粉著火困難。水分增加還導致煤粉失去松散性,煤粉斗和給粉機出現煤粉粘結現象。

另外,煤炭化驗設備水分增加時,燃燒產生的水蒸氣體積增加,因而使煙氣量增多,增加了排煙熱損失和引風機耗電量。水分壩天和引風機耗電量。水分過高,較多的水分隨一、三次風送人爐膛會直接影響煤粉著火和燃燒的穩定性。水分增高,煙氣中水蒸氣分塍也增高,促進了煙氣中三氧死硫形艦侃敵烝汽的作用,增加鍋爐尾部低襯的剝落。


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