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Hydrogen and helium gas mixture separation and recovery device

A technology of mixed gas and recovery device, applied in hydrogen separation, separation method, dispersed particle separation, etc., can solve the problem of not seeing and so on

Inactive Publication Date: 2015-02-11
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, there are always more or less shortcomings or deficiencies in the treatment of hydrogen using a single technology. So far, no device using a single technology has been seen that can simultaneously obtain high Pure inert gas, high purity hydrogen

Method used

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  • Hydrogen and helium gas mixture separation and recovery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Separation and recovery of high-concentration hydrogen-helium mixed gas

[0019] The high-concentration hydrogen-helium mixed gas directly enters the membrane separator. After membrane separation, the hydrogen-permeable end gas is introduced into the hydrogen storage tank, and the membrane tail gas enters the low-temperature adsorption bed. After entering the helium storage tank, the water produced by oxidation is collected in the water storage tank; there is still a certain amount of helium in the desorbed hydrogen, which is returned to the membrane separator for further separation to obtain high-purity hydrogen and a small amount of hydrogen-helium mixed gas, and the hydrogen-helium mixed gas enters again Low-temperature adsorption bed, so that both high-purity hydrogen and high-purity helium can be obtained.

[0020] The membrane used in this example is a palladium-silver alloy membrane, the raw material gas is hydrogen-helium mixed gas containing 96% hyd...

Embodiment 2

[0023] Example 2 Separation and recovery of high-concentration hydrogen-helium mixed gas

[0024] The difference between this embodiment and embodiment 1 is that the following parameters are different, and all the other are the same as embodiment 1

[0025] The raw material gas is a hydrogen-helium mixture containing 92% hydrogen, and the inlet flow rate is controlled at 1.5L / min; the catalytic oxidation bed is a silver oxide column, and the reaction temperature is 260°C. Hydrogen with a purity of 99.5% is obtained at the hydrogen permeable end, and the hydrogen recovery rate reaches 97.4%; the volume concentration of hydrogen in the helium flowing out of the cryogenic adsorption bed is less than 20ppm, and the hydrogen volume concentration in the helium flowing out of the catalytic oxidation bed is less than 10ppm.

Embodiment 3

[0026] Example 3 Separation and recovery of hydrogen-helium mixture gas in the middle hydrogen concentration range

[0027] The medium-concentration hydrogen-helium mixed gas is connected to the low-temperature adsorption bed, and the helium gas containing trace hydrogen flowing out after low-temperature adsorption enters the catalytic oxidation bed (more needed when tritium is involved). A small amount of water is collected in the water storage tank; desorbed hydrogen contains a certain amount of helium, which enters the membrane separator for further separation to obtain high-purity hydrogen and a small amount of hydrogen-helium mixed gas, and the hydrogen-helium mixed gas enters the low-temperature adsorption bed again, so that high-purity hydrogen can be obtained , and high-purity helium can be obtained. The hydrogen volume concentration of the hydrogen-helium mixed gas is 10%, and the low-temperature adsorption bed is a 5A molecular sieve bed. The adsorption temperatur...

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PUM

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Abstract

The invention provides a hydrogen and helium gas mixture separation and recovery device. The device characterized in that a high-concentration hydrogen and helium gas mixture in the device is connected with a membrane separator, and the membrane separator is connected with a low-temperature adsorption bed and a hydrogen gas storage tank respectively; a medium-concentration hydrogen and helium gas mixture is connected with the low-temperature adsorption bed, the low-temperature adsorption bed is connected with the membrane separator, a catalytic oxidation bed and a helium gas storage tank respectively, and the catalytic oxidation bed is connected with the helium gas storage tank and a water storage tank respectively; a low-concentration hydrogen and helium gas mixture is connected with the catalytic oxidation bed, and the catalytic oxidation bed is connected with the helium gas storage tank and the water storage tank respectively. By adopting the device provided by the invention, the separation and recovery of the hydrogen and helium gas mixtures of different volumetric concentrations can be realized.

Description

technical field [0001] The invention relates to a hydrogen-helium mixed gas separation and recovery device. Background technique [0002] With the development of mankind, the energy shortage has become increasingly serious. In order to make up for the shortage of energy, the development of nuclear energy has become an urgent task for all mankind. Whether it is the heavy water upgrade of the traditional heavy water reactor or the deuterium-tritium fuel cycle process in the fusion reactor, the separation and recovery of hydrogen isotopes are involved. In these processes, hydrogen isotopes are usually mixed with a carrier gas, usually an inert gas such as helium. [0003] In recent decades, scientific and technological workers have carried out a lot of work in hydrogen isotope recovery technology, hydrogen isotope and inert gas separation technology, especially in low temperature cold well, low temperature adsorption, catalytic oxidation, membrane separation, low temperature c...

Claims

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Application Information

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IPC IPC(8): C01B3/50C01B23/00B01D53/86
Inventor 任兴碧李毅古梅侯京伟
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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