The reliability lab ship fuel oil donkey boiler controlled by relay control system is evaluated using counting method, and mean time to failure (MTTF) of the control circuit is educed.
对采用继电器控制系统进行控制的某实验室船舶燃油辅助锅炉，采用计数法进行可靠性评估，得出控制电路的平均无故障时间。
The deviation is a important reason causing reheater tube failure of 300MW and 600MW boiler. It is experienced that steam temperature is higher at right 1/4 area of reheater system.
MW锅炉的偏差温度是引起再热器爆管的一个重要原因，在再热器系统表现为沿炉宽方向右1/4区域汽温较高。
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