The change of the flue temperature in a coking period is a hyperbola.Two undulances of the hyperbola change with the operating sequence, overhaul schedule and the direction changed period.

• 摘要火道温度随结焦周期的变化呈双峰曲线变化规律，双峰曲线的两个波形随著推焦计划、检修时间与周转时间的不同而变化。