This study have accurately measured the temperature and concentration of a specific gas through using absorption spectroscopy using a tunable diode laser and using the measured data value, gas temperatures and concentrations within a wide range is reconstructed through tomography techniques. In larg...
This study have accurately measured the temperature and concentration of a specific gas through using absorption spectroscopy using a tunable diode laser and using the measured data value, gas temperatures and concentrations within a wide range is reconstructed through tomography techniques. In large facilities, the conventional probe type gas sampling measurement method and temperature measurement by point have a disadvantage that it is difficult to accurately measure the internal temperature and concentration. In addition, the gas sampling measurement method occur time-legs During sampling and analysis in the measurement section, exhaust gas with sampling characteristics already exists in the area after SCR, and It has a problem that cannot be controlled in real time. In large facility environments, the problem of replacement life due to frequent failure of gas analyzer is also emerging. Therefore, a measurement technology with non-contact characteristics is required. The line average value was obtained by separating the laser to measure the temperature and concentration in various sections, it was reconstructed through the tomography technique, which enables 2D visualization. A lab scale test was conducted by supplying standard gases with different concentrations to the electric furnace and temperature measurement using H2O and concentration of NO and NH3 were measured. The pilot scale experimental equipment is an SCR simulation device of a large facility. The temperature was measured inside a square electric furnace using the DAS technique of TDLAS through a pilot scale experiment. The temperature was measured by analyzing the absorption signal using a H2O wavelength of 1388 nm. The NO concentration was measured using a wavelength of 5192 nm through the DAS technique and the change in concentration over time was measured. The measured value was compared with the gas analyzer and the deviation rate was calculated. In the NH3 concentration measurement experiment, the absorption signal was measured using the WMS technique of TDLAS. Using the absorption signals of H2O, NO, and NH3, the temperature and concentration inside the square electric furnace were reconstructed through the Tomography technique. Reconstructed using ART, MART, and SMART methods, and initial values were PLOS, MLOS, ALOS, and RMS. Based on the reconstructed result values, the internal temperature and concentration distribution map of the square electric furnace was created and analyzed.
This study have accurately measured the temperature and concentration of a specific gas through using absorption spectroscopy using a tunable diode laser and using the measured data value, gas temperatures and concentrations within a wide range is reconstructed through tomography techniques. In large facilities, the conventional probe type gas sampling measurement method and temperature measurement by point have a disadvantage that it is difficult to accurately measure the internal temperature and concentration. In addition, the gas sampling measurement method occur time-legs During sampling and analysis in the measurement section, exhaust gas with sampling characteristics already exists in the area after SCR, and It has a problem that cannot be controlled in real time. In large facility environments, the problem of replacement life due to frequent failure of gas analyzer is also emerging. Therefore, a measurement technology with non-contact characteristics is required. The line average value was obtained by separating the laser to measure the temperature and concentration in various sections, it was reconstructed through the tomography technique, which enables 2D visualization. A lab scale test was conducted by supplying standard gases with different concentrations to the electric furnace and temperature measurement using H2O and concentration of NO and NH3 were measured. The pilot scale experimental equipment is an SCR simulation device of a large facility. The temperature was measured inside a square electric furnace using the DAS technique of TDLAS through a pilot scale experiment. The temperature was measured by analyzing the absorption signal using a H2O wavelength of 1388 nm. The NO concentration was measured using a wavelength of 5192 nm through the DAS technique and the change in concentration over time was measured. The measured value was compared with the gas analyzer and the deviation rate was calculated. In the NH3 concentration measurement experiment, the absorption signal was measured using the WMS technique of TDLAS. Using the absorption signals of H2O, NO, and NH3, the temperature and concentration inside the square electric furnace were reconstructed through the Tomography technique. Reconstructed using ART, MART, and SMART methods, and initial values were PLOS, MLOS, ALOS, and RMS. Based on the reconstructed result values, the internal temperature and concentration distribution map of the square electric furnace was created and analyzed.
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