| 摘要 |
PURPOSE:To perform the accurate operation control of a decarburizing process by measuring the concns. of steam and CO-gas, by measuring the absorption amounts of electromagnetic wave beam to steam in the vicinity of the surface of a steel plate and CO-gas formed by the reaction of steam and the surface of the steel plate. CONSTITUTION:The electromagnetic wave beam 5 from a beam source 4 transmits a filter 10 passing only a wavelength lambda showing absorbing characteristics to steam to reach a rotary sector 11. Said beam 5 is incident on the interior of a furnace 1' through a window part 11' and propagates through said furnace 1' to be reflected by a reflective mirror 6 while the reflected beam is further reflected by a beam splitter 7 to enter a detector 8. This detection signal is set to I1. The beam 5 is totally reflected by a total reflection mirror 11'' and the reflected beam is reflected by the beam splitter 7 to similarly enter the detector 8. This detection signal is set to I2. In addition, the signal, which is reflected by a total absorbing surface 11''' and detected, is refered as a zero base and set to I3. The mol number (n) of steam per the unit volume in the furnace is calculated by formula. In the formula, alpha is coefficient of attenuation, L is a propagation distance and K is constant. The measurement of CO-gas can be performed in a perfectly similar way. |
