SO2 gas density monitoring and its monitoring method

A gas concentration, sulfur dioxide technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problem of limiting the measurement of macromolecular gases

Inactive Publication Date: 2005-01-12
哈尔滨工大北新恒业能源科技有限公司
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Although the cost of diode laser spectroscopy technology is low, its wavelength tuning range i

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  • SO2 gas density monitoring and its monitoring method

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Embodiment Construction

[0005] combine figure 1 Describe this embodiment, this embodiment is made up of measured gas 3, light source 1, lens 2, lens 4, spectrograph 5, computer 6; To the optical monitoring input end of spectrograph 5, the data output end of spectrograph 5 is connected to the data input end of computer 6; Monitoring method of the present invention: (a). Obtain the spectrum of measured gas 3 by spectrograph 5, (b). Take a group of adjacent peaks and valleys near the wavelength of 300nm, (c). Take the peak as I(λ 1 ), take the valley as I(λ 2 ), (d). Bring the above two values ​​into N=-Ln[I(λ 1 )÷I(λ 2 )]÷{[σ(λ 1 )-σ(λ 2 )]×L} formula, it can be obtained that the SO in the measured gas 3 2 The concentration of the gas, the σ(λ in the formula 1 ) for SO 2 at wavelength λ 1 The absorption cross section value at , σ(λ 2 ) for SO 2 at wavelength λ 2 The absorption cross-section value at , L is the distance traveled by light in the measured gas 3, N is the SO in the measured gas...

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Abstract

The monitoring system includes serial connected light source, lens (2), gas to be detected, lens (4), spectrograph and computer. Monitoring procedure includes following steps: (a) spectrum of gas to be detected is obtained by spectrograph; (b) peak value and valley value adjacent wave are taken from wavelength about 300nm; (c) peak value is I (lambda 1), and valley value is I (lambda 2); (d) concentration of SO2 is N obtained from formula N=-Ln[I(lambda 1)/I (lambda 2)]/{[delta (lambda 1) - delta (lambda 2)]XL}; Delta (lambda 1), delta (lambda 2) are values of absorption cross-section of SO2 at wavelengths (lambda 1) and (lambda 2), L is light path in gas to be detected.

Description

Technical field: [0001] The invention relates to a gas concentration monitoring system and method, in particular to a sulfur dioxide gas concentration monitoring system and method. Background technique: [0002] With the development of the economy, the amount of sulfur dioxide discharged into the air has been increasing, and has exceeded 20 million tons for many years, ranking first in the world. If the sulfur dioxide and other pollutants emitted by coal-fired power plant boilers are not controlled, serious urban air pollution will be caused, acid rain will spread rapidly, and serious losses will be caused to people's lives and property. At present, my country's coal-fired power plants are constantly strengthening the control of flue gas pollution emissions. Relevant departments have formulated new environmental protection regulations to control SO 2 Gases and other pollutants are subject to total control, and sewage charges will be implemented. Therefore, it is imperative...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 张治国徐峰秦艳丽吴少华秦裕琨
Owner 哈尔滨工大北新恒业能源科技有限公司
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