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Direct measuring apparatus and measuring method for hydrogen sulfide content and sulfur isotope in natural gas

A technology of sulfur isotope and measuring device, which is applied in the direction of measuring device, material analysis by electromagnetic means, instrument, etc., can solve the problems of easy error, many steps of indirect analysis method, narrow linear range of gas chromatography, etc.

Inactive Publication Date: 2013-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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Problems solved by technology

The indirect analysis method has many steps, which is prone to errors, and the linear range of gas chromatography is narrow, so it is necessary to prepare standard samples with different contents

Method used

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  • Direct measuring apparatus and measuring method for hydrogen sulfide content and sulfur isotope in natural gas
  • Direct measuring apparatus and measuring method for hydrogen sulfide content and sulfur isotope in natural gas
  • Direct measuring apparatus and measuring method for hydrogen sulfide content and sulfur isotope in natural gas

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Embodiment

[0049] Such as figure 1 As shown, a device for direct measurement of hydrogen sulfide content and sulfur isotope in natural gas, including: a sample inlet 1, a U-shaped cold trap 6 and a mass spectrometer 7, one end of the U-shaped cold trap 6 is connected to the sample inlet 1, and the other end is connected to the mass spectrometer Instrument 7;

[0050] A vacuum valve A2 is arranged on the pipeline between the sample inlet 1 and the U-shaped cold trap 6, a vacuum valve B3 is arranged on the pipeline between the U-shaped cold trap 6 and the mass spectrometer 7, and the vacuum pump 5 passes through the pipeline and the U-shaped cold trap. The pipeline between 6 and the vacuum valve B3 is connected, and a vacuum valve C4 is arranged on it;

[0051] The device is a sealing device, the pipeline is a vacuum-sealed pipeline, and the material of the pipeline is made of stainless steel; the inlet and the pipeline are connected by a ferrule, and a silicon rubber sealing gasket is ar...

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Abstract

The invention discloses a direct measuring apparatus and a measuring method for hydrogen sulfide content and sulfur isotope in a natural gas. The measuring apparatus comprises an injection port, a U-shaped cold trap and a mass spectrometer, wherein one end of the U-shaped cold trap is connected with the injection port; the other end of the U-shaped cold trap is connected with the mass spectrometer; a vacuum valve A is disposed on a pipeline between the injection port and the U-shaped cold trap; a vacuum valve B is disposed on a pipeline between the U-shaped cold trap and the mass spectrometer, a vacuum pump is communicated with the pipeline between the U-shaped cold trap and the vacuum valve B through the pipeline; a vacuum valve C is disposed on the vacuum pump; and the apparatus is a sealed apparatus. The measuring method comprises that the natural gas is directly introduced to a mass spectrometer for measuring the hydrogen sulfide content and sulfur isotope after being enriched by the U-shaped cold trap. The apparatus and the method can be used for measuring by the mass spectrometer, and have the characteristics of accurate data, simple operations, little sample, rapid analysis speed, etc.

Description

technical field [0001] The invention belongs to the field of geochemical analysis, and furthermore, relates to a direct measurement device and method for hydrogen sulfide content and sulfur isotope in natural gas. Background technique [0002] There are many analysis methods for hydrogen sulfide content in natural gas, including iodometric method, methylene blue method, lead acetate method, spectrophotometric method, ultraviolet absorption method, gas chromatography, etc. Among these methods, only gas chromatography is a direct analysis method, and others are is an indirect analysis. The indirect analysis method is to use chemical reagents to absorb hydrogen sulfide in natural gas on site, and then use chemical methods to analyze its content, such as iodometric method (GB / T 11060.1-1998 iodometric method for the determination of hydrogen sulfide content in natural gas), methylene blue method (GB / T 11060.2-1998 Determination of hydrogen sulfide content in natural gas methyle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64
Inventor 刘文汇李立武腾格尔张中宁高波张殿伟付小东王作栋杜丽
Owner CHINA PETROLEUM & CHEM CORP
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