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High pressure trace gas sampling analyzer

A trace gas, sampling and analysis technology, applied in the direction of analyzing materials, sampling devices, instruments, etc., can solve the problems of difficult fluid replenishment, pressure fluctuation, influence of gas properties, etc., and achieve the effect of small sampling error, small leakage and simple operation.

Active Publication Date: 2017-04-05
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

However, for microscale effect research experiments, due to the small amount of gas diffusion in the microstructure, it is difficult to replenish the subsequent fluid, so too much sampling flow rate will cause pressure fluctuations, making it difficult to achieve stable pressure control, and changes in pressure will affect the gas nature has a great influence

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Embodiment Construction

[0014] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0015] Such as figure 1 As shown, the present invention proposes a high-pressure trace gas sampling analyzer 100, the high-pressure trace gas sampling analyzer 100 includes a vertically arranged first intermediate container 1 and a second intermediate container 2, the top of the first intermediate container 1 passes through The first pipeline 31 is connected with a high-pressure gas experiment device (prior art, not shown in the figure), and a second pipeline 32 is also connected between the top of the first intermediate container 1 and the second intermediate container 2. Pipeline 32 is provided with micropipe 4, and the pipe diameter of described micropipe 4 is greater than or equal to 0.5 micron, is less than or equal to 100 m...

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Abstract

The invention discloses a high-pressure trace gas sampling analyzer. The high-pressure trace gas sampling analyzer comprises a first intermediate container and a second intermediate container both of which are arranged vertically, wherein the top of the first intermediate container is connected with high-pressure gas experiment equipment through a first pipeline; a second pipeline is connected between tops of the first intermediate container and the second intermediate container and provided with a micro-tube; a first valve is arranged between the micro-tube and the second intermediate container; the top of the second intermediate container is parallelly provided with a vacuum pumping pipeline and a detected gas suction pipeline; the vacuum pumping pipeline is connected with a vacuum pump through a second valve; and the detected gas suction pipeline is connected with a gas chromatograph through a third valve. The high-pressure trace gas sampling analyzer is characterized in that gas is collected in a way that pressure difference is controlled via flow resistance of gas in the micro-tube, a trace gas mixture is extracted and analyzed online under a high pressure experiment condition, and pressure stability and experimental continuity can be ensured in the high pressure gas test equipment.

Description

technical field [0001] The invention belongs to the technical field of gas sampling and analysis, and in particular relates to a high-pressure trace gas sampling analyzer, which is especially suitable for continuous sampling and analysis of gas in experiments such as trace gas flow, seepage, and diffusion under high-pressure conditions. Background technique [0002] With the in-depth development of research on microsystems, microstructures, microdevices and nanomaterials in various fields such as tight oil and gas development, microelectronic machinery, aerospace and medical treatment, theories and technologies related to microscale effects have become current research hotspots. In the process of micro-scale effect research, especially the micro-scale effect research in the process of tight oil and gas development, the sampling and analysis of trace gas under high pressure has become an important factor restricting its in-depth development. [0003] At present, the existing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24G01N30/02
Inventor 岳湘安方欣安维青冯雪钢邹积瑞李丹
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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