In order to measure the flue gas temperature at furnace outlet in real time and guide the operation in power stations

real-time temperature measurement on furnace outlet gas of large scale power plants was carried out.The thermocouples were installed at the furnace outlet and the horizontal flue pass to detect the flue gas temperature

and the inaccuracy of measurement caused by the low temperature of walls in the around was modified.The temperature distribution of flue gas at inlet of the final reheater was also calculated based on the relationship between the temperature distribution of the inlet flue gas and the outlet steam of the convection heating surface.The measurement and calculation results indicate that

the above method can measure the flue gas temperature at the furnace outlet with high accuracy and calculate the flue gas temperature distribution along the furnace width direction.This method can be used to monitor the combustion condition of boilers

guide adjusting combustion parameters

and avoid slagging and blowing of pipes caused by flue gas over temperature and the left and right temperature deviation.