由于火焰烟温的脉动性使得无法采用常规的3热电偶法测定真实的烟气温度。采用3热电偶法测量火焰温度时,实时测量热电偶的时间常数,对热电偶测量值进行动态补偿。测试结果表明:3热电偶测量值的相对标准偏差小于3 5%,与抽气热电偶测量值的相对偏差小于±4%。具有较好的重复性和较高的准确性,能够用于测量炉膛内真实的火焰温度。 The actual flue gas temperature can not be measured using the conventional 3 thermocouple method due to the pulsation of the flame temperature. When measuring the flame temperature by 3 thermocouple method, the time constant of the thermocouple is measured in real time, and the thermocouple measurement value is dynamically compensated. The test results show that the relative standard deviation of 3 thermocouple measurements is less than 35% and the relative deviation from the measured values ​​of aspirated thermocouples is less than ± 4%. With good repeatability and high accuracy, it can be used to measure the real flame temperature in the furnace.