Ultraviolet flue gas analyzer based on full space coupled optical path

Abstract

The invention discloses an ultraviolet flue gas analyzer based on a full space coupled optical path. The ultraviolet flue gas analyzer comprises a central processing module, an ultraviolet light source, a spectrograph, a collimation lens A, a collimation lens B, a gas inlet pipe, a gas outlet pipe, a cavity I and a cavity II, wherein the ultraviolet light source and the spectrograph are respectively connected with the central processing module; the collimation lens A is positioned at a light outlet of the ultraviolet light source; the collimation lens B is positioned at a received light inletof the spectrograph; a right angle prism is arranged in the cavity II; one ends of both the gas inlet pipe and the gas outlet pipe are communicated with the cavity I and the other ends of the gas inlet pipe and the gas outlet pipe are communicated with the cavity II; the cavity I further comprises a gas inlet and a gas outlet; and the gas inlet and the gas outlet of the cavity I are respectively communicated with an external gas source filled with to-be-measured gas by gas pipes. According to the invention, no ultraviolet optical fiber is arranged in the integral device, optical coupling efficiency is high, total transmittance of the optical path is hardly changed along with time and temperature, high measurement accuracy is ensured, problems caused by low optical coupling efficiency, easiness for aging of an ultraviolet optical fiber and easiness for damage of a conventional ultraviolet gas analyzer are solved, and use maintenance cost of the instrument is obviously reduced.

Description

technical field [0001] The invention relates to an ultraviolet flue gas analyzer with full-space coupled optical paths, belonging to the field of optical measurement. Background technique [0002] The ultraviolet flue gas analyzer is used to measure the concentration of specific gases in the exhaust gas of fixed pollution sources. It is a necessary detection equipment for the supervision of the total discharge of gaseous pollutants, and it is also a necessary instrument for enterprises in various working conditions to achieve energy saving, emission reduction, and recycling of exhaust gas. [0003] Usually, the ultraviolet flue gas analyzer is composed of several main parts such as coupling optical fiber, gas chamber, ultraviolet light source, spectrometer and central processing module. The coupling optical fiber is located between the ultraviolet light source and the gas chamber, between the gas chamber and the spectrometer, and completes the light energy transfer function ...

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