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Method and device utilizing preparative chromatograph to separate krypton and xenon

A chromatographic separation and chromatographic column technology, applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve problems such as long time required, complicated operating conditions, and inability to realize the adsorption and separation of krypton and xenon, and achieve Reduce complexity and achieve difficulty, design reasonable effect

Inactive Publication Date: 2012-06-13
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

This method can only separate the standard gases of xenon and radon; the separation device uses a five-stage adsorption bed and two adsorption materials, which increases the complexity of the device and the difficulty of operation; the activation treatment of carbon molecular sieves before use takes a long time, The operating conditions are complicated; the adsorption material used in this method is carbon molecular sieve, which cannot realize the adsorption and separation of krypton and xenon

Method used

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  • Method and device utilizing preparative chromatograph to separate krypton and xenon
  • Method and device utilizing preparative chromatograph to separate krypton and xenon
  • Method and device utilizing preparative chromatograph to separate krypton and xenon

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Embodiment Construction

[0025] The device for separating krypton and xenon by preparative chromatography of the present invention includes a sample gas cylinder 1, a helium cylinder 19, a chromatographic quantitative tube 5, a preparative chromatography column 10, a thermal conductivity detector 16, a collection container 14, and a mass Flow controllers 17 and 21, solenoid valves 4, 6 and vacuum pump 8 are connected to the connecting pipe at the outlet of sample bottle 1 with pressure reducing valve 2 and three-way connector 3 in turn. The pipe connected by the three-way connector 3 is divided into two The first pipeline is connected to the valve 22, the mass flow controller 21 and the three-way joint 20 in sequence, and the two pipelines from the three-way joint 20 are respectively connected to the pressure reducing valve 18, the helium cylinder 19 and the mass flow control The outlet of the mass flow controller 17 is connected to the thermal conductivity detector 16; the solenoid valve 4, the chromat...

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Abstract

The invention relates to a method and a device utilizing a preparative chromatograph to separate krypton and xenon. The method comprises enabling a 5A molecular sieve to serve as a preparative chromatograph column, choosing appropriate carrier gas flow velocity and temperature of the chromatograph column by utilizing difference of the retention time of krypton and xenon on the chromatograph column, and achieving separation of krypton and xenon according to difference of the retention time of krypton and xenon on the chromatograph column. The separating device based on the method is reasonable in design and easy to operate, and can be used for nuclear fuel assembly monitoring, environmental monitoring and research evaluation.

Description

Technical field [0001] The invention relates to a method and device for separating rare gases krypton and xenon. A 5A molecular sieve packed column is used as a chromatographic column. The difference in retention time of krypton and xenon on the chromatographic column is used to select an appropriate carrier gas flow rate and chromatographic column temperature to control krypton The retention time of xenon on the chromatographic column can realize the separation of krypton and xenon. The device established by this method can be used for nuclear fuel reactor monitoring, environmental monitoring and research evaluation. Background technique [0002] Nuclear power plants, nuclear submarines, etc. 235 U is a nuclear fuel power reactor, 235 Some radioactive noble gases produced by U fission such as 85 Kr, 88 Kr, 133 Xe and 135 Xe, etc., when the fuel cladding ruptures, they will diffuse into the gas gap between the fuel and the cladding and eventually be released, causing harm. When p...

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Application Information

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IPC IPC(8): C01B23/00B01D15/10
Inventor 张昌云陈莉云武山曾宝珠张海涛杨静
Owner NORTHWEST INST OF NUCLEAR TECH
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