Hydrogen liquefaction system and method
A technology of hydrogen and heat exchangers, applied in liquefaction, refrigeration, liquefaction, solidification, etc., can solve the problem of high energy consumption, achieve the effects of improving conversion efficiency, reducing energy consumption, and reducing clogging
Pending Publication Date: 2022-05-27
HANGZHOU ZHONGTAI CRYOGENIC TECHNOLOGY CORPORATION
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Problems solved by technology
This kind of process is simple, less equipment, but relatively high energy consumption, it is more suitable for small-scale liquefaction equipment, but there is a problem of high energy consumption for large-scale hydrogen liquefaction
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[0038] The technical solutions of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following examples, and any modifications and / or changes made to the present invention will fall within the protection scope of the present invention.
[0039] In the present invention, unless otherwise specified, all parts and percentages are in units of weight, and the equipment and raw materials used can be purchased from the market or commonly used in the art. The methods in the following examples, unless otherwise specified, are conventional methods in the art. Unless otherwise specified, the components or equipment in the following examples are general standard parts or components known to those skilled in the art, and their structures and principles are all known to those skilled in the art through tec...
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The invention provides a mixed refrigeration hydrogen liquefaction system and method. A hydrogen liquefaction system comprises a cold box heat exchange unit which comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger and a sixth heat exchanger; a low-temperature adsorption unit; an ortho-parahydrogen conversion unit; a mixed refrigerant compression unit; a refrigeration hydrogen compression unit; a refrigeration hydrogen expansion unit; a first pipeline; a second pipeline; a third pipeline; and the third pipeline is provided with a third branch pipeline between the second heat exchanger and the third heat exchanger. By reasonably preparing a refrigeration process of each heat exchanger and adopting a mode of combining mixed refrigerant refrigeration and hydrogen compression expansion refrigeration, the number of equipment required by a hydrogen liquefaction system is reduced, the ortho-parahydrogen conversion efficiency is improved, meanwhile, the blockage phenomenon possibly caused by filling a catalyst into the heat exchangers is reduced, the energy consumption of hydrogen liquefaction is greatly reduced, and the energy consumption of hydrogen liquefaction is reduced. The content is lower than 10 kw / kgLH2.
Description
technical field [0001] The invention relates to the technical field of low-temperature gas liquefaction, in particular to a hydrogen liquefaction system and method. Background technique [0002] At present, the main energy sources used in China are coal, oil and natural gas, which are all non-renewable energy sources and release a large amount of greenhouse gas CO when they are used. 2 . With the increasingly serious situation of global warming, the use of renewable and clean energy has become the consensus of everyone. my country has also formulated a schedule to achieve carbon peaking and carbon neutrality. Using hydrogen as an energy source is one direction to achieve the goal of carbon neutrality. However, due to the low density of hydrogen and the large volume per unit mass of hydrogen, the transportation of hydrogen has become a stumbling block in the realization of hydrogen energy utilization. Therefore, the method of using high-pressure hydrogen and liquefied hydr...
Claims
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Login to View More IPC IPC(8): F25J1/00F25J5/00
CPCF25J1/001F25J5/00F25J1/004F25J1/0219F25J2270/16F25J1/0055F25J1/005F25J1/0067F25J1/0052
Inventor 李传明章有虎苟文广钟晓龙孟凡荣韦小雄
Owner HANGZHOU ZHONGTAI CRYOGENIC TECHNOLOGY CORPORATION