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Method and system for detecting trace amount of water in helium

A detection method and detection system technology, which is applied to the structure details of gas analyzers, measurement devices, and gas mixture analysis, etc., can solve the problems of high detection cost of high-purity helium, reduce the amount, reduce the cost of separation, and reduce the use Effect

Pending Publication Date: 2022-03-04
HUANENG NUCLEAR ENERGY TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defect of high detection cost of high-purity helium in the prior art when detecting the amount of water in high-purity helium, thereby providing a water trace detection method and detection method in helium. system

Method used

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  • Method and system for detecting trace amount of water in helium
  • Method and system for detecting trace amount of water in helium

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Effect test

Embodiment 1

[0039] The invention discloses a water trace amount detection system in helium gas and a method for detecting water trace amount in helium gas to be measured by using the water trace amount detection system.

[0040] A water trace detection system in helium in the present embodiment, such as figure 1 As described above, it includes an air intake pipeline 1 , a reference gas cylinder 2 , an analyzer 3 and a flow controller 4 . Inlet pipeline 1 is suitable for providing the helium gas to be measured, and is connected to the inlet of flow controller 4, the gas outlet of the flow controller 4 is connected to the inlet of analyzer 3, and the reference gas cylinder 2 is passed through the reference The gas delivery pipeline 5 communicates with the air inlet of the flow controller 4 , thereby realizing the communication between the reference gas cylinder 2 and the analyzer 3 .

[0041] Wherein, the reference gas delivery pipeline 5 is also communicated with an exhaust pipeline 7 . ...

Embodiment 2

[0050] The water trace detection system disclosed in this embodiment is consistent with Embodiment 1. This embodiment also provides a method for detecting water traces in helium to be measured. When there is a trace amount of water, the pipeline needs to be purged first, and the specific purging steps are as follows:

[0051] First adjust the pressure of the helium to be measured in the sampling line 6 to 250kPa, then open the third valve 12, and enter the helium to be measured in the purification system through the sampling line 6 into the recovery line 9 for sampling of helium The pipeline 6 is purged, and the helium gas to be measured for purging is recovered to the gas storage system 8 through the recovery pipeline 9, and the third valve 12 is closed after purging for 10 minutes.

[0052] After the sampling line 6 is purged, adjust the pressure of the reference gas to 100kPa, open the exhaust valve 13 to allow the reference gas to purge the exhaust line 7, and then close t...

Embodiment 3

[0057] The water trace detection system disclosed in this embodiment is consistent with Embodiment 1. This embodiment also provides a method for detecting water traces in helium to be measured. When there is a trace amount of water, the pipeline needs to be purged first, and the specific purging steps are as follows:

[0058] First adjust the pressure of the helium to be measured in the sampling line 6 to 250kPa, then open the third valve 12, and enter the helium to be measured in the purification system through the sampling line 6 into the recovery line 9 for sampling of helium The pipeline 6 is purged, and the helium gas to be measured for purging is recovered to the gas storage system 8 through the recovery pipeline 9, and the third valve 12 is closed after 5 minutes of purging.

[0059] After the sampling line 6 is purged, adjust the reference gas pressure to 150kPa, open the exhaust valve 13 to make the reference gas purge the exhaust line 7, and then close the exhaust va...

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Abstract

The invention discloses a method for detecting trace water in helium, which comprises the following detection steps: pretreatment: firstly purging a sampling pipeline by using helium to be detected, then purging a gas inlet pipeline by using reference gas, and finally putting into operation; wherein after the pretreatment, the gas pressure in the sampling pipeline is set to be 1.5-2.5 bar; the pressure of helium to be measured and the pressure of reference gas in the analyzer are kept at 1-2 bar, and the gas flow is smaller than or equal to 200 mL / min; the reference gas is inert gas of which the water content is less than 0.001%; and detection: conveying the helium to be detected into the analyzer for detection through the sampling pipeline and the gas inlet pipeline in sequence. The invention further discloses a system for detecting the trace amount of the water in the helium. The system is suitable for detecting the trace amount of the water in the helium by using the method for detecting the trace amount of the water in the helium. On the premise of ensuring the accuracy of the test value of the trace water in the helium, the use amount of the helium during the measurement of the trace water in the helium is reduced, and the waste of the helium is reduced.

Description

technical field [0001] The invention relates to the technical field of water trace detection, in particular to a water trace detection method and detection system in helium. Background technique [0002] With the development of the national economy and the rise of high-tech, the demand for high-purity gas is increasing, especially high-purity helium is often used as filling gas in spacecraft or advertising balloons, and is also used in military industry, scientific research, petrochemical, refrigeration , medical, semiconductor and other fields. [0003] As the "universal solvent" in the gas, the water content is one of the important indicators for the quality control of high-purity helium. Due to the unique physical and chemical properties of water itself, such as solubility, adsorption, etc., water in high-purity helium is difficult to remove. Although it will not affect the quality or purity of manufactured products, it will affect the service life of equipment in contac...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01N33/00
CPCG01N1/22G01N33/0009
Inventor 洪伟郭召辉茹增田盛建鹏张冀兰刘华张晓斌王苗苗杨加东魏文斌高俊柯海鹏蒋勇
Owner HUANENG NUCLEAR ENERGY TECH RES INST CO LTD
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