OFA：
OF
A、
发布时间：2025-02-22 08:34:56
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答案：止旋风，旋转方向与燃烧器切圆方向相反，抵消炉内切圆旋转动能，防止烟气离开炉膛时温差过大；同时提供一个富氧燃烧区，让燃料燃烧完全。
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