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首页> 美国政府科技报告 >Development of On-Line Temperature Measurement Instrumentation for Gasification Process Control. Semi-annual rept. ending 4/01/2001
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Development of On-Line Temperature Measurement Instrumentation for Gasification Process Control. Semi-annual rept. ending 4/01/2001

机译：用于气化过程控制的在线温度测量仪器的开发。半年度报告。结束4/01/2001

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This progress report covers continuing work to develop a temperature probe for a coal gasifier. A workable probe design requires finding answers to crucial questions involving the probe materials. We report on attempts to answer those questions. We attempted to measure the laser-input power at a wavelength of 355 nm that would damage the ends of sapphire fiber optics. We were surprised and pleased to learn that they survived an input power density which greatly exceeds the best that fused-silica fibers can do. During a run of our new simulator to obtain an upgraded calibration curve for the improved YAG:Dy phosphors, we found that the phosphor appeared to form a eutectic, with the fused-silica cuvette used to hold the phosphor, when the temperature exceeded 1450 degrees C. This result could have substantial ramifications in this and other high-temperature applications. Our new proprietary detector package that replaced the original photomultiplier tube gave excellent results, with much better signal-to-noise ratio at a given temperature than the old package. Our new plasma-spraying operation has succeeded in spraying YAG, which we think may be a technological breakthrough.

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