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Non-disperse infrared multi-component flue gas analyzer

A non-dispersive infrared and flue gas analyzer technology, which is applied in the direction of material analysis, material analysis by electromagnetic means, material analysis by optical means, etc., can solve the problems of large measurement error and complex structure of monitoring device, and achieve the deduction of interference , expand the dynamic measurement range, increase the effect of absorption optical path

Inactive Publication Date: 2011-09-14
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a non-dispersive infrared multi-component flue gas analyzer to solve the problems of complex structure and large measurement error of the monitoring device in the prior art

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Embodiment Construction

[0033] Such as figure 1 shown. A non-dispersive infrared multi-component flue gas analyzer includes an infrared light source, an optical filter wheel, a multiple reflection pool, a gas path system and a data analysis system. The light beam generated by the infrared light source enters the multiple reflection pool through the optical filter device, and enters the infrared detector after multiple reflections. The solenoid valve controls the flow direction of the sampled gas, and the flow controller keeps the flow rate of the sampled gas constant. The data sampling and analysis system is divided into three parts: pre-amplification, A / D conversion, and analysis and processing.

[0034] Such as figure 2 shown. The filter installation sequence is: blank aperture, CO 2 , SO 2 (low), NO 2 , NO, CO, H 2 O, reference 1, SO 2 (high).

[0035] The invention is a portable non-dispersive infrared multi-component flue gas on-line analyzer. A light source with black-body radiation...

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Abstract

The invention discloses a non-disperse infrared multi-component flue gas analyzer. In the non-disperse infrared multi-component flue gas analyzer, a light source with similar black body radiation characteristic is adopted and can cover infrared absorption bands of all component gases to be tested and interfered component gases; high-stability light source emission is realized by designing a voltage-stabilizing and current-stabilizing circuit; an optically filtering wheel is provided, so double effects of optically filtering and modulating light waves are achieved, and stability and measuring accuracy of a system are improved; concentration of various gases in the flue gas can be measured at the same time by reasonably selecting parameters of optical filters; a water vapor measuring channel is introduced on the optically filtering wheel, so an analyzer can work in the damp environment normally; a sample pool adopts a multi-time reflection pool structure, so gas absorption optical distance is increased and detection sensitivity of the system is improved; and the sample pool adopts a heating and temperature control system, so water vapor condensation and combination of the water vapor and acidic gases to be tested such as sulfur dioxide (SO2) and nitrogen dioxide (NO2) are avoided, and measuring accuracy and corrosion resistance of the system are improved.

Description

technical field [0001] The invention relates to a continuous automatic monitoring device for multi-component gas of flue gas discharged from pollution sources, in particular to a non-dispersive infrared multi-component flue gas analyzer based on non-dispersive infrared absorption spectrum. Background technique [0002] With the further improvement of industrialization, people are more and more concerned about the impact of air pollution on the global environment. Emissions from fossil fuel burning equipment, often containing many different types of polluting gases such as CO 2 , NO 2 , SO 2 , CO, NO, etc. Due to the potential threat of these harmful emissions to the environment, many countries monitor the emissions of different types of exhaust gases. In order to ensure that the gas concentration emitted meets the relevant standards, people urgently need a continuous emission monitoring system (CEMS, Continuous Emission Monitoring System) that can be installed on pollutio...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N27/407G01N21/3504
Inventor 汪世美孙友文黄书华刘文清谢品华陆亦怀王亚萍陈军于晓曼
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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