Hydrogen liquefaction process

A hydrogen and process technology, applied in the field of hydrogen liquefaction, can solve the problems of low liquefaction efficiency and large investment, achieve the effects of small evaporation loss, reduce safety hazards, and reduce energy consumption

Active Publication Date: 2018-11-06
ZHANGJIAGANG FURUI HYDROGEN ENERGY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, facing large-scale industrial needs, the main problems of current hydrogen liquefaction technology are still low liquefaction efficiency and large investment

Method used

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Embodiment Construction

[0034] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] The hydrogen liquefaction process depends on the hydrogen liquefaction device, so the hydrogen liquefaction device must first be designed and manufactured. Such as figure 1 As shown, the structure of the hydrogen liquefaction device is: including a first compressor unit, a purification device, a first cold box 101, a second cold box 102, a throttling expansion valve, a liquid hydrogen storage tank, a liquid nitrogen precooling device, The second compressor group and the third compressor group 9 .

[0036] The first compressor unit includes: a first low-pressure compressor and a first high-pressure compressor, wherein the first low-pressure compressor can be a low-pressure unit-screw oil-filled compressor or a low-pressure dry piston multistage compressor, and the first high-pressure compressor The ...

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Abstract

The invention discloses a hydrogen liquefaction process. The hydrogen liquefaction process comprises the following steps that firstly, raw material hydrogen is compressed and purified; then, the compressed and purified gaseous hydrogen is subjected to gaseous hydrogen ortho para conversion; then the mixed liquid hydrogen is subjected to liquid hydrogen ortho para conversion, and finally the liquidhydrogen is stored in a liquid hydrogen storage tank, and the gasified low-temperature gaseous hydrogen in the liquid hydrogen storage tank is recycled for using in the liquefaction process, so thatthe energy consumption required for hydrogen liquefaction is reduced and the cost is reduced. By adopting the hydrogen liquefaction process, high-purity liquid hydrogen can be obtained, and the parahydrogen concentration in the liquid hydrogen is not less than 98%, the orthohydrogen concentration which spontaneously undergoes the ortho para conversion in the liquid hydrogen is effectively reduced,and evaporation loss of the liquid hydrogen is little, and little potential safety hazard.

Description

technical field [0001] The invention relates to hydrogen liquefaction technology, in particular to a hydrogen liquefaction process. Background technique [0002] With the development of industry and the improvement of people's material living standards, the demand for energy is also increasing day by day. Because coal, oil and other fossil energy sources will inevitably pollute the environment when used, coupled with their limited reserves, human beings are faced with the daunting challenge of developing efficient and clean secondary energy sources, so it is imminent to find renewable green energy sources. As an ideal energy carrier that can be obtained from various sources, hydrogen is one of the important bridges for the transition from fossil energy to renewable energy, and will provide a new important form of terminal energy utilization. [0003] The utilization of hydrogen energy needs to solve a series of problems such as production, storage, transportation and applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J1/02
CPCF25J1/0238F25J2215/10F25J1/001F25J1/005F25J1/0052F25J1/0067F25J1/0072F25J1/0205F25J1/025F25J1/0265F25J1/0288F25J2240/60F25J2245/90F25J2270/16
Inventor 况开锋倪中华严岩魏蔚郭道峰邬海强王秋霞
Owner ZHANGJIAGANG FURUI HYDROGEN ENERGY EQUIP CO LTD
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