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Hydrogen liquefaction equipment provided with parallel-connection turbo expander units

A turboexpander, hydrogen technology, applied in liquefaction, refrigeration and liquefaction, lighting and heating equipment, etc., can solve the problems of high energy consumption and low hydrogen liquefaction temperature, and achieve the effect of low energy consumption and high efficiency

Pending Publication Date: 2021-02-12
BEIJING INST OF AEROSPACE TESTING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The liquefaction temperature of hydrogen is very low, so the hydrogen can only be liquefied if it is cooled below a certain temperature, and this process requires a lot of energy

Method used

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  • Hydrogen liquefaction equipment provided with parallel-connection turbo expander units

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Embodiment Construction

[0044] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0045]It should be noted that the hydrogen liquefaction equipment of the present invention is suitable for the large-scale liquid hydrogen production requirement of producing at least 30 tons of liquefied hydrogen per day. Hydrogen is a diatomic molecule, and the two hydrogen nuclei rotate around their axes. According to the relative orientation of the two nuclear spins, hydrogen molecules can be divided into orthohydrogen and parahydrogen. The usual hydrogen is a mixture of these two forms of hydrogen molecules. The equilibrium concentration of ortho-parahydrogen is only related to temperature. The hydrogen whose concentration of ortho-parahydrogen reaches a stable equilibrium at different temperatures is called equilibrium hydrogen. At a temperature above room temperature, it contains 75% orthohydrogen and 25% parahydrogen. At the liquid hydrogen satur...

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Abstract

The invention discloses hydrogen liquefaction equipment provided with parallel-connection turbo expander units. The hydrogen liquefaction equipment comprises a vacuum box, a hydrogen purification device, a pre-cooling device, a first hydrogen compressor unit, a second hydrogen compressor unit, a first turbo expander unit, a second turbo expander unit, a first low-temperature adsorber, a second low-temperature adsorber, a heat exchanger, an orthohydrogen-to-parahydrogen converter, an adjusting valve, a throttling valve, a liquid hydrogen tank and a liquid hydrogen storage tank. According to thehydrogen liquefaction equipment, the two turbo expander units are adopted for parallel-connection refrigeration, a hydrogen refrigeration circulation system in parallel connection with high-pressurethrottling refrigeration is adopted, raw material hydrogen is converted, cooled and liquefied through the multi-stage orthohydrogen-to-parahydrogen converter, hydrogen can be liquefied by 100%, the parahydrogen content reaches 99% or above, and the advantages of being high in hydrogen liquefaction efficiency and low in energy consumption are achieved.

Description

technical field [0001] The invention relates to the technical field of hydrogen energy utilization, in particular to a hydrogen liquefaction device equipped with a parallel turboexpander unit. Background technique [0002] With the continuous acceleration of the global industrialization process, the consumption of fossil fuels is increasing, and the pollution to the environment is becoming more and more serious. It is urgent to find a clean fuel as an alternative. Hydrogen is the most common element in nature, constituting 75% of the mass of the universe. It has a wide range of sources, various preparation methods, clean and pollution-free, and has the highest mass energy density. These unique advantages make it widely used in the fields of energy and chemical industry . [0003] Hydrogen can be used as a chemical raw material, or as a fuel for rockets, gas turbines, and internal combustion engines. It can also be converted into electricity by fuel cell systems and used in ...

Claims

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Application Information

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IPC IPC(8): F25J1/02
CPCF25J1/0244F25J1/0257F25J1/001F25J2210/42F25J2270/16F25J1/005F25J1/0052F25J1/0221F25J1/0204F25J1/0067F25J2205/60F25J2220/02F25J1/025F25J2250/02F25J2210/62F25J2210/80
Inventor 安刚杨申音赵耀中张振扬吴俊哲韩卫济许健
Owner BEIJING INST OF AEROSPACE TESTING TECH
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