[An investigation of temperature compensation of HCL gas online monitoring based on TDLAS method].
HCL, with the character of strong erosion and toxicity, is a kind of chemical material of vital importance. So measuring the HCL in-situ can not only optimize its production process, but also be necessary to reduce the environment pollution. TDLAS (tunable diode laser absorption spectroscopy) technology, and owning the advantage of the tunability and narrow line width of the diode laser, this method can relatively easily select the absorption line of the detected gas without the interference from other gas, thus making the rapid and accurate HCL measurement possible. In the present paper, the HCL measurement system and the implemented experiment are introduced. The impact of the temperature on the measurement as well as the temperature compensation method is emphasized. The final experimental results validated the rationality of the empirical equation and therefore the improvement of the accuracy and feasibility of the TDLAS technology. The system, whose detection limitation reaches 2 ppm, can satisfy the needs of industrial in-sit measurement.
Shu
Xiao-Wen
XW
Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China. no1asuka@163.com
Zhang
Yu-Jun
YJ
Kan
Rui-Feng
RF
Cui
Yi-Ben
YB
He
Ying
Y
Zhang
Shuai
S
Geng
Hui
H
Liu
Wen-Qing
WQ