题目
A distorted furnace in a fire-tube auxiliary boiler may be the result of （）firing for extended periods in the low fire mode overheating, due to waterside deposits varying the water level above the crown sheet carrying excessive alkalinity in the boiler water
A distorted furnace in a fire-tube auxiliary boiler may be the result of （）
firing for extended periods in the low fire mode
overheating, due to waterside deposits
varying the water level above the crown sheet
carrying excessive alkalinity in the boiler water
题目解答
答案
B
解析
在辅助锅炉中，炉膛变形可能由多种因素引起。选项中，由于水侧沉积物导致的过热是炉膛变形的一个可能原因。水侧沉积物会阻碍热传递，导致局部过热，从而引起炉膛变形。其他选项，如在低火模式下长时间燃烧、水位波动和过量碱度，虽然可能对锅炉运行有影响，但不是炉膛变形的主要原因。