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全站搜索蓄熱式加熱爐蓄熱式燒嘴爐用耐火材料

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蓄熱式燃燒爐的行業(yè)現狀

發(fā)布日期：2022-11-26 作者：點(diǎn)擊：

鋼鐵工業(yè)一直是我國新型工業(yè)化進(jìn)程中的基礎產(chǎn)業(yè)，在基礎產(chǎn)業(yè)中占有重要的支柱地位。根據有關(guān)部門(mén)的統計，到2020年7月，中國粗鋼產(chǎn)量為9340萬(wàn)噸，占世界總產(chǎn)量的61％，成為世界上最大的鋼鐵生產(chǎn)國和消費國。同時(shí)，鋼鐵行業(yè)也是資源密集型行業(yè)。在能源方面，我國的鋼鐵工業(yè)一直以煤炭為主導。與世界主要鋼鐵生產(chǎn)國的鋼鐵工業(yè)的能源結構相比，我國的煤炭消耗量高于其他國家。天然氣和燃料油的比例明顯低于發(fā)達國家。從能源消耗來(lái)看，目前我國軋鋼加熱爐的回收利用率僅為25％，而連續鋼軋加熱爐是鋼鐵行業(yè)能耗最高的設備。它的熱效率僅為20％至30％，大約70％至80％的熱量散失了。

當前選擇的儲熱體主要包括陶瓷儲熱顆粒和蜂窩體。這兩種蓄熱器都可以滿(mǎn)足加熱爐的要求，但是它們都有各自的優(yōu)缺點(diǎn)。蜂窩體的每單位體積的熱交換面積大。在相同條件下，蜂窩體的傳熱能力是陶瓷顆粒的傳熱能力的4至5倍。當熱交換容量相同時(shí)，蜂窩狀蓄熱體的體積僅需為陶瓷粒狀蓄熱體的1/3至1/4。采用蜂窩體的燃燒器結構緊湊輕巧。

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