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Gas analysis device, gas sampling device and gas analysis method

A gas analysis and gas sampling technology, applied in sampling devices, measuring devices, analysis materials, etc., can solve problems such as methane concentration and volume changes

Active Publication Date: 2021-11-09
HORIBA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a result, the concentration and amount of methane to be measured fluctuate due to fluctuations in the mixing ratio of the sample gas and oxygen.
[0006] Such a problem also becomes a problem in other gas analysis devices other than the device for measuring methane

Method used

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  • Gas analysis device, gas sampling device and gas analysis method
  • Gas analysis device, gas sampling device and gas analysis method
  • Gas analysis device, gas sampling device and gas analysis method

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Embodiment Construction

[0050] Hereinafter, a first embodiment of the gas analysis device 1 of the present invention will be described with reference to the drawings.

[0051]The gas analysis device 1 of the present embodiment analyzes components contained in a sample gas such as exhaust gas discharged from an internal combustion engine of a vehicle, for example.

[0052] Specifically, as figure 1 As shown, the gas analysis device 1 includes: a sample gas pipeline 11, which flows through the sample gas; a methane analyzer (first analyzer) 12, which is arranged on the sample gas pipeline 11, and analyzes the methane contained in the sample gas; A non-methane cut-off device 13 arranged upstream of the methane analyzer 12 on the sample gas pipeline; a first gas supply pipeline 14 for supplying a first gas containing oxygen to the non-methane cut-off device 13; and a second gas supply pipeline 15 , used to supply the second gas containing hydrogen to the non-methane cut-off device 13 .

[0053] One end...

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Abstract

The present invention provides a gas analysis device, a gas sampling device, and a gas analysis method capable of measuring the concentration or amount of methane contained in a sample gas with high precision even if the pressure of a sample gas pipeline fluctuates. The gas analysis device (1) comprises: a sample gas pipeline (11), through which the sample gas flows; a pressure loss mechanism (20), arranged on the sample gas pipeline (11); a pressure control mechanism (21) , by referring to the pressure at the front stage of the pressure loss mechanism, part of the sample gas is discharged from the rear stage of the pressure loss mechanism (20) or a predetermined amount is supplied to the rear stage of the pressure loss mechanism (20). The gas controls the pressure difference of the sample gas pipe (11) before and after the pressure loss mechanism (20); and the analyzer analyzes the sample gas flowing through the sample gas pipe (11).

Description

technical field [0001] The present invention relates to a gas analysis device for analyzing components of a sample gas such as exhaust gas of an automobile, and a gas sampling device for sampling a sample gas. Background technique [0002] For example, as shown in Patent Document 1, in the case of measuring methane contained in a sample gas such as exhaust gas, the sample gas may be passed through a non-methane cut-off device so that hydrocarbons other than methane contained in the sample gas are contained in the sample gas. Combustion in a non-methane cut-off. [0003] During the above-mentioned combustion, in order to prevent excessive combustion of methane due to excess oxygen or non-combustion of hydrocarbons other than methane due to insufficient oxygen, it is necessary to supply oxygen at an appropriate ratio to the sample gas. [0004] However, in such a gas analyzer, the flow rate of the sample gas may vary due to, for example, pulsation of the sampling pump, pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/626G01N1/24G01N35/00G01N35/10
CPCG01N1/24G01N27/626G01N35/00584G01N35/1009
Inventor 茂原治久日下竹史
Owner HORIBA LTD