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Online multi-component gas analysis photoacoustic spectrometer

A gas analysis and multi-component technology, applied in the analysis of materials, material analysis through optical means, instruments, etc., can solve the problems of poor real-time performance and single detection gas

Active Publication Date: 2021-06-04
安徽宝龙环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the traditional photoacoustic spectroscopy has strict requirements on the pre-treatment of gas detection to avoid contamination of the lens by gas impurities; the real-time performance is not strong; only one photoacoustic cavity detects a single gas

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Embodiment Construction

[0022] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the presently disclosed embodiments as recited in the appended claims.

[0023] see Figure 1-2 , in an embodiment of the present invention, an online multi-component gas analysis photoacoustic spectrometer, including a light source 1, a filter chopper, an air inlet 4 and a photoacoustic cell assembly linearly arranged in sequence; the filter chopper and An air curtain 2 is arranged between the air inlet 4, the air inlet 4 and the photoacousti...

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Abstract

The invention relates to the technical field of gas photoacoustic spectrum detection, in particular to an online multi-component gas analysis photoacoustic spectrometer which comprises a light source, a filtering chopper, a gas inlet channel and a photoacoustic cell assembly which are linearly arranged in sequence, air curtains are arranged between the filtering chopper and the air inlet channel and between the air inlet channel and the photoacoustic cell assembly; the photoacoustic cell assembly comprises a plurality of photoacoustic cells which are connected in series, each photoacoustic cell is provided with a sound sensor connected with the control module, one of the photoacoustic cells encapsulates reference gas, and the rest of the photoacoustic cells encapsulate gas which is the same as any component gas in detected gas; emitted light of the light source is filtered by the filtering chopper and then enters the air inlet channel and the photoacoustic cell assembly; each sound sensor collects a photoacoustic signal generated by the corresponding photoacoustic cell and transmits the photoacoustic signal to the control module. The device has the beneficial effects that the plurality of photoacoustic cells which are connected in series can be used for simultaneously measuring multiple components on line, and complicated pretreatment on measured gas is not needed.

Description

technical field [0001] The invention relates to the technical field of gas photoacoustic spectrum detection, in particular to an online multi-component gas analysis photoacoustic spectrometer. Background technique [0002] Gas detection technology has a wide range of applications in modern society, such as the determination of harmful gas content in the air, motor vehicle exhaust detection, flue gas detection of power plants, cement plants, etc., all of which are inseparable from gas detection technology; photoacoustic effect. When a sample placed in a closed container is irradiated with light modulated by a chopper whose intensity changes periodically at a certain frequency, the container can generate sound waves with the same frequency as the chopper; this phenomenon is called the photoacoustic effect. [0003] Photoacoustic spectroscopy is a relatively mature gas detection technology at present. Photoacoustic spectroscopy uses the absorption of gas to excite photoacousti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G01N21/03
CPCG01N21/1702G01N21/03G01N2021/1704G01N2021/0357Y02A50/20
Inventor 崔凯刘进马磊潘英杰方传胜吴丽明吴菲
Owner 安徽宝龙环保科技有限公司
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