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Gas analyzer

A gas analyzer and gas technology, applied in the field of gas analyzers, can solve the problems of low energy utilization, low spectral signal-to-noise ratio, low luminous flux, etc. Effect

Inactive Publication Date: 2016-11-30
QINGDAO HAINA PHOTOELECTRICAL ENVIRONMENTAL PROTECTION
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Problems solved by technology

The prior art has the following deficiencies: 1) micro-spectrometers mostly use gratings as spectroscopic elements, and slits must be used in principle, which has the disadvantages of low luminous flux and low spectral signal-to-noise ratio; 2) due to the low energy utilization rate of micro-spectrometers, In order to obtain a better spectral signal-to-noise ratio, a higher-power ultraviolet light source is required, and the cost of a high-power ultraviolet light source and a micro-spectrometer is relatively high, which makes it difficult to popularize sulfur dioxide analyzers based on ultraviolet absorption spectroscopy

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Embodiment Construction

[0036] Such as figure 1 As shown, sulfur dioxide has obvious absorption in the ultraviolet spectral region, and its spectral absorption section 11 is mainly distributed between 240nm-330nm, especially between 280nm-310nm with a larger absorption section, as shown by the number 12 in the figure, And it has a significant periodic high-frequency modulation, and the absorbance of the high-frequency modulation part has a linear relationship with the concentration. Therefore, the absorption spectrum of sulfur dioxide can be collected in this area, and the high-frequency modulation part can be extracted to calculate the concentration of sulfur dioxide. This method is not affected by moisture and particles in the sample gas, and has good anti-interference ability.

[0037] Such as figure 2 Shown is the principle block diagram of the gas analyzer disclosed in the present invention, the gas analyzer includes: an ultraviolet light source 21 , a collimating mirror 22 , an ultraviolet in...

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Abstract

The invention provides a gas analyzer. The gas analyzer is used for detecting and analyzing sulfur dioxide gas, and comprises an ultraviolet source used for emitting ultraviolet light beam, a collimating mirror, a gas absorption pool used for absorbing the ultraviolet light beam processed via collimation by the collimating mirror, a convergent mirror used for converging the ultraviolet light beam sent from the gas absorption pool, an ultraviolet photoelectric detector used for detecting the ultraviolet light beam converged via the convergent mirror, wherein the front surface of the collimating mirror is used for vertically receiving the ultraviolet light beam sent by the ultraviolet light beam, the collimating mirror is used for collimating the ultraviolet light beam, and an ultraviolet interference light filtering part is arranged on the light path between the ultraviolet source and the gas absorption pool. The gas analyzer possesses following advantages: luminous flux is large, spectrum signal to noise ratio is high, and cost is low. The gas analyzer is convenient for large scale popularization.

Description

technical field [0001] The invention relates to the technical field of gas analyzers, in particular to a sulfur dioxide gas analyzer. Background technique [0002] Sulfur dioxide is an important air pollutant, which not only causes direct harm to human health, plants, ecological environment, materials, etc., but also forms more harmful acid rain with the precipitation process, causing huge natural disasters and economic losses. Therefore, sulfur dioxide is one of the main monitoring objects of environmental monitoring. Compared with other methods, ultraviolet absorption spectroscopy is used for the detection of sulfur dioxide, which has the advantages of low detection limit and small cross-interference. Therefore, ultraviolet absorption spectroscopy has become the standard method for sulfur dioxide detection in many countries, and it is also being promoted rapidly in China. [0003] A sulfur dioxide analyzer based on ultraviolet absorption spectroscopy, its basic component...

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Application Information

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IPC IPC(8): G01N21/33G01N21/01
CPCG01N21/01G01N21/33
Inventor 王新全梁永武婧
Owner QINGDAO HAINA PHOTOELECTRICAL ENVIRONMENTAL PROTECTION
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