3 Dimensional Temperature Reconstruction Of Ubular-furnace

Tubular-Furnace is widely used in petrochemical industry. The gas and furnace tube temperature of the furnace are key parameters of the tubular-furnace, which are important to the economical efficiency,safety,quality,and pollutant control of the furnace. Because the thermocouple we used is only capable of measuring point-temperature and has thermal lag, we are now lack of 3-D temperature monitor method. It is proved that 3-D temperature visualization monitoring system based on DRESOR method is a effective temperature measurement way. This paper researches a way that enable DRESOR to apply to tubular-furnace, which can reconstruct the gas and furnace tube temperature of the furnace. We added two new kind of grid and a new energy bundle travel way. This paper introduces the fundament theory of DRESOR and temperature reconstruction model, focuses on the calculation of DRESOR number in the tubular-furnace and energy bundle travel procedure. We conducted experiments on two tubular-furnace. The results shows that in the small test furnace, DRESOR can reconstruct good gas and furnace tube temperature. The relative error of gas temperature is below 5%, error of tube temperature is less than 20℃. In the big industrial furnace, as we did not build a fixed system and has some difficulty in choosing optical parameters, the relative error of gas temperature is about 7%.