Keeping the heat capacity and fuel quantiy unchanged, the rear arc of a boiler was reformed to burn medium coal successfully.

• 在保证锅炉可见热度和燃料消耗量不变的情况下,为使锅炉适应不同煤种,对蒸汽锅炉进行了后拱技术改造并试烧中煤,获得成功。