可调谐激光吸收光谱技术应用于高温环境下CO的测量  

MEASUREMENT OF CO CONCENTRATION USING TUNABLE LASER ABSORPTON SPECTROSCOPY TECHNOLOGY UNDER HIGH TEMPERATURE CONDITION

作　　者：姚华[1] 王飞[1] 许婷[1] 姜治深[1] 池涌[1] 严建华[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《热力发电》2011年第11期42-45,51,共5页Thermal Power Generation

摘　　要：基于可调谐二极管激光吸收谱线(TDLAS)技术和波长调制技术(WMS),选用2 302.12nm处的吸收谱线,在1 000K高温环境下对CO浓度进行测量。结果表明:直接测量法最大误差小于5%;WMS技术测量最大误差小于3%,单位光程的最小探测极限可达20×10-6,两种方法的拟合曲线系数均大于0.99。其中,WMS方法可有效地抑制低频噪音,提高系统的灵敏度,测量值更接近于实际值。Based on the tunable diode laser absorption spectroscopic line（TDLASL） Techonology and the wavelength modulation spectroscopic（WMS） technology,and selecting the absorption spectroscopic line at 2302.12 μm,the measurement of CO concentration under 1000 K high temperature environment has been carried out,the result shows that the maximum error in direct measurement method is less than 5%,the maximum error in WMS method is less than 3%,the minimum detectable limit in unit optical length can reach 20×10-6.Through analysis of the two said methods,it is believed that the WMS method can effectively suppress the low frequency noise,enhancing the sensitivity of said system,making the measured value to be more close to the actual value.

关 键 词：激光吸收光谱 CO测量 波长调制 二次谐波 高温 

分 类 号：TK314[动力工程及工程热物理—热能工程]