从六十年代初期在大型煤粉炉上开始采用四角布置组织切圆燃烧的直流式燃烧器以来,普遍感到比旋流式燃烧器优越。运行实践证明其着火条件好、燃烧稳定、经济性高、运行调整性好,煤种适应性广,因此在我国得到迅速发展,被广泛地用于燃烧无烟煤及高灰份劣质煤,并积累了许多宝贵经验。新型“夹心风”式燃烧器的出现是基于以下设计思想: 1)已有的“周界风”式燃烧器虽运行尚好,但存在“风包粉”的现象,实践和试验表明,投入“周界风”使着火明显推迟,燃烧 Since the beginning of the 1960s when large-scale pulverized coal furnaces began to adopt the four-corner arrangement of tangential-burned DC burners, it was generally felt superior to cyclone burners. It has been proved that it has good ignition conditions, stable combustion, high economy, good operation adjustability and wide adaptability to coal. Therefore, it has been rapidly developed in our country and widely used for burning anthracite and high-ash low-grade coal and accumulating Many valuable experience The emergence of the new “Sandwich-style” burner is based on the following design ideas: 1) Although the existing “perimeter” type burners are still operating well, they have the phenomenon of “wind wrapping powder.” Practice and tests show that the " Make the fire obviously delayed, burning