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何为预混燃烧和非预混燃烧
更新时间: 2020-06-28 00:00:00  

预混燃烧,燃料和氧气或空气预先混合成均匀的混合气,此可燃混合气称为预混合气,预混合气在燃烧器内进行着火,燃烧的过程称为预混燃烧,预混燃烧一般发生在封闭体系中或混合气体向周围扩散的速度远小于燃烧速度的敞开体系中,燃烧放热造成产物体积迅速膨胀,压力升高;

非预混燃烧,非预混燃烧指燃料与空气未经预先混合,在分别送入燃烧设备后采取边混合边燃烧的燃烧方式,属于扩散燃烧,由于燃料和空气未预混,故允许将两者预热至较高的温度不受着火温度限制,以便充分利用废气余热,并可使低发热量燃料也能达到较高的燃烧温度

关键词: 燃烧

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