Cold box with ortho-para hydrogen conversion function

A functional and cold box technology, applied in the field of cold box with normal-parahydrogen conversion function, can solve the problem of not having a cold box, and achieve the effect of solving the problem of temperature maintenance

Pending Publication Date: 2018-09-21
ZHANGJIAGANG FURUI HYDROGEN ENERGY EQUIP CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now there is a cold box that can provide cooling capacity for gaseous hydrogen liquefaction and a cold box that can provide gaseous hydrogen normal-parahydrogen conversion, but currently does not have a cold box that can simultaneously provide cooling capacity for gaseous hydrogen liquefaction and gaseous hydrogen normal-parahydrogen conversion cold box

Method used

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  • Cold box with ortho-para hydrogen conversion function

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0013] Such as figure 1 As shown, a cold box with positive-parahydrogen conversion function includes: a shell 1, a shell inlet 11 and a shell outlet 12 are arranged on the shell 1, and the cold source can flow into the shell through the shell inlet 11 body 1, and can flow out of the housing 1 through the housing outlet 12. In this embodiment, the cold source is usually liquid nitrogen; The heat exchange tube inlet 24 and the heat exchange tube outlet 25 of 2 protrude from the shell 1 respectively. The combined heat exchange tube 2 includes a section of spirally coiled heat exchange tube 21 and a section of straight heat exchange tube 22. The spirally coiled heat exchange tube 21 is ringed On the outside of the straight heat exchange tube 22 , a catalyst 23 capable of catalyzing the positive-parahydrogen conversion of hydrogen is arranged...

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Abstract

The invention discloses a cold box with an ortho-para hydrogen conversion function. The cold box comprises a shell. A shell inlet and a shell outlet are formed in the shell, a cold source can flow into the shell via the shell inlet and can flow out of the shell via the shell outlet, a combined heat exchange tube is further arranged in the shell, a heat exchange tube inlet and a heat exchange tubeoutlet of the combined heat exchange tube extend out of the shell, the combined heat exchange tube comprises a spiral curved heat exchange tube and a straight heat exchange tube, the spiral curved heat exchange tube annularly sleeves the straight heat exchange tube, and catalysts capable of catalyzing ortho-para hydrogen conversion are arranged in the straight heat exchange tube. The cold box withthe ortho-para hydrogen conversion function has the advantages that multi-gas-flow sunken tube-and-shell heat exchanger design concepts are adopted, accordingly, hydrogen cooling and ortho-para hydrogen conversion of hydrogen can be synchronously carried out in the cold box, heat generated in ortho-para hydrogen conversion procedures further can be absorbed, and the temperatures can be maintainedin the ortho-para hydrogen conversion procedures.

Description

technical field [0001] The invention relates to the field of liquid hydrogen production equipment, in particular to a cold box with the function of positive-parahydrogen conversion. Background technique [0002] Liquid hydrogen is a colorless, odorless, transparent liquid formed from liquefaction of hydrogen, which is a mixture of parahydrogen (p-H2) and orthohydrogen (o-H2). Orthohydrogen and parahydrogen are two spin isomers of molecular hydrogen. The chemical properties of parahydrogen and orthohydrogen are exactly the same, but the physical properties are different. At room temperature or above room temperature, the equilibrium composition ratio of positive and secondary hydrogen is 75:25, which is called standard hydrogen (n-H2) or normal hydrogen. When the temperature is lower than normal temperature, the equilibrium composition ratio of positive and parahydrogen will change, and the percentage of parahydrogen will increase. The normal-to-secondary conversion of gase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J1/02
CPCF25J1/0235F25J2215/10
Inventor 倪中华邬海强严岩魏蔚况开锋郭道峰王秋霞
Owner ZHANGJIAGANG FURUI HYDROGEN ENERGY EQUIP CO LTD
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