论文部分内容阅读
为解决采用紫外差分吸收光谱法对烟气中主要气体污染物SO2和NOx进行测量时不方便和误差较大的问题,该文设计了单边插入式双光路探头,能较好适应烟道内高温对探头形状的影响,工作稳定可靠,现场调整方便。光谱数据的定标和标准量化是以Lambert-Beer定律为基础,针对实际环境中的非线性因素所产生的偏离Lambert-Beer定律的现象,该文提出一套可将气体长度变化等效于浓度变化的标定方法,采用不同长度的单一浓度的标准气体,实现了探头高精度标定。使用标定后的探头对SO2和NO两种气体进行多次测量,平均偏差均小于1.5%。
In order to solve the inconvenient and error-prone problem of using ultraviolet differential absorption spectrometry to measure the SO2 and NOx of the main gas pollutants in flue gas, this paper designed a single-side inserted dual optical probe which can better adapt to the high temperature The shape of the probe, stable and reliable, easy to adjust the scene. The calibration and standard quantification of spectral data are based on Lambert-Beer’s law, and deviate from the Lambert-Beer law which is caused by the nonlinear factors in the real environment. This paper proposes a set of equations that can change the gas length equivalent to the concentration Change the calibration method, the use of different concentrations of a single standard gas, to achieve high-precision calibration of the probe. The calibrated probe was used to measure SO2 and NO gases for several times with average deviations less than 1.5%.