| 摘要 |
PURPOSE:To easily judge the operation state of a shaft furnace, by optically measuring the temp. of the combustion zone in front of a tuyere and obtaining the long cyclical change and the steep change in the measured temp. CONSTITUTION:The leading end 4 of an optical fiber 3 is provided to a tuyere 1 or in the vicinity thereof and light radiated from the combustion zone 2 in front of the tyere 1 is incident to the leading end 4 of said optical fiber 3 and guided to an optical temp. measuring apparatus 5 such as a color thermometer through optical fiber 3. The apparatus 5 determines the temp. of the combustion zone 2 on the basis of the received light to indicate the same by an indicator 8 or separates the same into a low frequency component showing an average temp. and a high frequency component showing steep temp. change through a low pass filter 6 and a high pass filter 7 to separately indicate both components by indicators 9, 10. The average temp. is cyclically changed at every definite time and irregular steep temp. change appears on this cyclical temp. change in a superposed state in a good operation station. Therefore, the operation state of a shaft furnance is judged on the basis of the average temp. change and the steep temp. change. |
