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Online hydrogen purity detection instrument as well as use method and application thereof

A hydrogen purity and detection instrument technology, which is applied in the field of gas detection and optical sensing, can solve the problems of inability to realize online detection, insufficient analysis of impurity content, and long time-consuming gas detection, so as to reduce the influence of external light intensity, save equipment volume, The effect of reducing cross-interference

Pending Publication Date: 2021-06-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the detection of hydrogen purity in the prior art, the analysis of impurity content is insufficient, and only single-point detection can be realized in the detection area, the phenomenon of gas cross-interference is serious, gas detection takes a long time, and online detection cannot be realized

Method used

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  • Online hydrogen purity detection instrument as well as use method and application thereof
  • Online hydrogen purity detection instrument as well as use method and application thereof
  • Online hydrogen purity detection instrument as well as use method and application thereof

Examples

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Embodiment 1

[0062] Such as figure 2 As shown, this embodiment provides an online hydrogen purity detection instrument, including a carrier gas 21, a pressure reducing valve 22, a micro gas chromatography column, a light source 3, a detection gas chamber, a signal processing unit 7 and software modules.

[0063] The micro-gas chromatographic column uses He gas as the carrier gas, and the carrier gas is turned on before the infrared equipment is started to clean the equipment pipeline and gas chamber. The detector is on a single silicon chip, using a 3-meter S-type gas column, and controlling the micro-gas chromatography column to separate the detected gas at a specific time.

[0064] The light source 3 is a tunable semiconductor laser beam, which has the functions of current adjustment and temperature adjustment. The line width of the emitted beam is much smaller than the line width of the single absorption spectrum of the measured gas and the spectral line width of traditional infrared l...

Embodiment 2

[0070] This embodiment provides the method for using the online hydrogen purity detection instrument described in Embodiment 1, which includes the following steps: after the components of the gas to be measured are separated by a gas separation module; the light output by the light source 3 is captured by the optical intensity modulator Amplitude modulation is performed on a specific wavelength range; after the optical path passes through the detection gas chamber, it is collected by an infrared detector and converted into an electrical signal, which is processed by the signal processing unit 7 and repeated detection to obtain the spectral data of each gas at each time period; cooperate with the analysis software to obtain Measure gas composition data.

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Abstract

The invention relates to the field of gas detection and the field of optical sensing, and particularly provides an online hydrogen purity detection instrument as well as a use method and application thereof. The hydrogen purity online detection instrument comprises: a gas separation module and a light source (3), wherein each component gas in gas to be detected is separated in the gas separation module, the light source has the functions of current regulation and temperature regulation, and the line width of an emitted beam is far smaller than the single absorption line width of the gas to be detected and the spectral line width of a traditional infrared light source, and the separated gas is irradiated by the light source (3) to obtain a light signal; and a signal processing unit which is used for processing the optical signals to obtain spectral data of each gas in each time period, and is matched with analysis software to obtain composition data of the gas to be detected. The problems that in hydrogen purity detection in the prior art, impurity content analysis is insufficient, only single-point detection can be achieved in a detection area, the gas cross interference phenomenon is serious, gas detection consumes long time, and online detection cannot be achieved are solved.

Description

technical field [0001] The present disclosure relates to the fields of gas detection and optical sensing, and specifically provides an online hydrogen purity detection instrument and its use method and application. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] As a new type of clean energy, hydrogen is a research hotspot in the field of new energy. It is widely used in petroleum, battery, electric power, aviation, navigation, etc., but the mixture of hydrogen is highly explosive. Therefore, the determination of hydrogen in various industries In particular, precision instruments and technologies have higher requirements for hydrogen purity. How to realize fast and accurate online measurement of hydrogen concentration and impurity analysis has become an urgent problem to be solved in the hydrogen production industry. [0004] Domestic traditiona...

Claims

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Application Information

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IPC IPC(8): G01N21/3504
CPCG01N21/3504
Inventor 程星星王志强程嘉豪王鲁元张兴宇
Owner SHANDONG UNIV
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