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高速燒嘴與傳統燒嘴相比的優缺點

  A、優點

 。1)燃燒室和容積熱強度非常高,可達2.1&#215;108W/m3,因此燃燒室體積非常小,散熱少,燃燒熱效率高,而且有利于簡化窯體結構,這對發展高溫窯爐,節約燃料十分有利。

 。2)由于高速焰氣帶動窯內氣體在整個窯內循環流動,起著強烈的攪拌作用,使窯內溫度和氣氛都非常均勻,可對坯體進行均勻快速的加熱,提高產品的品質和產量,節約燃料。(3)能燃燒低熱值的燃氣,對熱值低的高爐煤氣也可穩定燃燒。

 。4)煙氣中NOX含量少。這是由于燃燒過程中氧的濃度可以控制到最小需要量,在高溫區停留時間短,高速的高溫焰氣噴入窯內大量卷吸溫度較低的窯氣后溫度迅速下降,而且窯內煙氣與坯體的熱交換強烈,使煙氣溫度迅速下降,這些過程對NOX的生成有抑制作用。

 。5)節省燃料。由于燃料熱效率高,燃燒室體積小,散熱少,窯內溫度均勻,消除了過熱的部份,減少窯體的蓄熱和散熱損失,窯內溫度均勻的氣流的強烈循環與攪拌作用強化了對坯體的給熱,既可實現安全快速的加熱,又可降低煙氣排出的溫度,因此使燃料消耗量明顯下降。

  B、缺點

 。1)燃燒速度快,燃燒強度高,燃氣噴出速度高等都使其工作噪音增大,應注意采取相應的消音措施,由于燃氣和空氣壓力要求高,動力消耗也較大。

 。2)燃燒室要采用耐溫度高,耐溫度急變性好,耐沖刷的特殊耐火材料,否則會影響使用壽命。

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