CN212113900U - Carbon dioxide and water electrolysis reforming hydrogen production system - Google Patents
Carbon dioxide and water electrolysis reforming hydrogen production system Download PDFInfo
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- CN212113900U CN212113900U CN202020182677.2U CN202020182677U CN212113900U CN 212113900 U CN212113900 U CN 212113900U CN 202020182677 U CN202020182677 U CN 202020182677U CN 212113900 U CN212113900 U CN 212113900U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model provides a carbon dioxide and water electrolysis reforming hydrogen production system, which comprises a reversible solid oxide fuel cell, a gas mixing device connected with an anode side pipeline of the reversible solid oxide fuel cell, and a hydrogen storage container and a water storage container which are respectively connected with the gas mixing device through pipelines; the reverse steam conversion device is a carbon dioxide storage container connected with the reverse steam conversion device through a pipeline; the hydrogen storage container is provided with a pressure adjusting device, and the pressure adjusting device is connected with the reverse water-vapor conversion device through a pipeline. The water and the hydrogen in the system are stored in corresponding containers, wherein the water can be used as water for electrolysis, the requirement of an electrolysis mode on the water is saved, the hydrogen can be used for carrying out a synthetic reaction with carbon dioxide to generate hydrocarbon which is easy to store, and the problems of high hydrogen storage cost and easy leakage are solved.
Description
Technical Field
The utility model relates to a hydrogen preparation technical field especially relates to a carbon dioxide and water electrolysis reforming hydrogen manufacturing system.
Background
The energy storage of the power grid is a main factor restricting the development of the renewable energy power grid at present. Renewable energy sources such as wind energy, tidal energy and solar energy have the characteristics of periodicity and volatility, and cannot be matched with the power consumption period of a power consumer, so that a large amount of electric energy of a power grid is wasted, and even the safety of the power grid is threatened.
The reversible oxide fuel cell can consume electric energy in an electrolysis mode due to the reversibility of the reversible oxide fuel cell, generate hydrogen (taking electrolyzed water as an example), and realize electrochemical energy storage; the system can also work in a battery mode, consume hydrogen, generate electric energy and make up for a power gap of a power grid. Therefore, the solid oxide fuel cell is a potential electrochemical grid balancing technology.
One major drawback of the above technology, however, is the technical difficulty of large-scale storage of the electrolysis product hydrogen. The current hydrogen storage technology mainly comprises high-pressure hydrogen storage, low-temperature liquid hydrogen storage and metal hydride hydrogen storage. The problems of hydrogen leakage, hydrogen brittleness of the container, high energy consumption, high cost and the like exist.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned prior art's not enough, the utility model aims at providing a carbon dioxide and water electrolysis reforming hydrogen manufacturing system, when aiming at solving the current balanced electric wire netting of adoption reversible solid oxide fuel cell, the difficult problem of storing of hydrogen that the electrolysis produced.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted as follows:
a carbon dioxide and water electrolysis reforming hydrogen production system, the system comprising:
the first subsystem comprises a reversible solid oxide fuel cell, a gas mixing device connected with an anode side pipeline of the reversible solid oxide fuel cell, and a hydrogen storage container and a water storage container which are respectively connected with the gas mixing device through pipelines;
the second subsystem comprises a reverse water vapor conversion device and a carbon dioxide storage container connected with the reverse water vapor conversion device through a pipeline;
the hydrogen storage container is provided with a pressure adjusting device, and the pressure adjusting device is connected with the reverse water-vapor conversion device through a pipeline.
Optionally, the carbon dioxide and water electrolysis reforming hydrogen production system further includes a first heat exchanger, and the first heat exchanger is respectively connected to the gas mixing device and the reversible solid oxide fuel cell pipeline.
Optionally, the system for hydrogen production by reforming of carbon dioxide and water electrolysis further comprises a first water-gas separator, wherein an inlet end of the first water-gas separator is connected with the first heat exchanger through a pipeline, a gas outlet end of the first water-gas separator is connected with the hydrogen storage container through a pipeline, and a water outlet end of the first water-gas separator is connected with the water storage container through a pipeline.
Optionally, the hydrogen production system by reforming carbon dioxide and water electrolysis is provided with a second heat exchanger at the air inlet of the reversible solid oxide fuel cell.
Optionally, the system for hydrogen production by reforming of carbon dioxide and water electrolysis, wherein the second subsystem further comprises a second moisture separator and a synthesis gas storage container, an inlet end of the second moisture separator is connected with the reverse moisture conversion device through a pipeline, a gas outlet end of the second moisture separator is connected with the synthesis gas storage container through a pipeline, and a water outlet end of the second moisture separator is connected with the synthesis gas storage container through a pipeline.
Optionally, the system for hydrogen production by reforming with carbon dioxide and water electrolysis further comprises a third heat exchanger, wherein an inlet end of the third heat exchanger is connected with an outlet end pipeline of the pressure regulating device, and an inlet end of the third heat exchanger is connected with an inlet end of the reverse water-steam converting device.
Optionally, the hydrogen production system by reforming carbon dioxide and water electrolysis is provided with an air pump between the hydrogen storage container and the first moisture separator.
Optionally, the hydrogen production system by reforming carbon dioxide and water electrolysis, wherein a carbon dioxide compressor is arranged between the carbon dioxide storage container and the reverse water-steam conversion device.
Optionally, the hydrogen production system by reforming with water electrolysis of carbon dioxide, wherein when the reversible solid oxide fuel cell is operated in an electrolysis mode, the mass flow ratio of water to hydrogen entering the gas mixing device is 30-45: 1.
Optionally, the hydrogen production system by reforming carbon dioxide and water electrolysis, wherein when the reversible solid oxide fuel cell operates in the cell mode, only hydrogen enters the gas mixing device.
Has the advantages that: the utility model provides a carbon dioxide and water electrolysis reforming hydrogen production system, this system utilize the electrolysis of reversible solid oxide battery to produce the gas energy storage mode and battery power generation mode to balance the electric power fluctuation in the renewable energy electric wire netting. In an electrolysis working mode, the system firstly utilizes electric energy to electrolyze water at high temperature to produce hydrogen, so that energy storage of a power grid is realized, the hydrogen and CO2 enter a reverse water-gas shift reactor, synthesis gases with different carbon-hydrogen ratios can be prepared, the system is suitable for subsequent Fischer-Tropsch reaction, synthesis of methanol and the like, and the problem of large-scale storage of the hydrogen is solved.
Drawings
FIG. 1 is a block diagram of a system for producing hydrogen by reforming carbon dioxide and water electrolysis according to an embodiment of the present invention.
Fig. 2 is a block diagram of another system for producing hydrogen by reforming carbon dioxide and water electrolysis according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the utility model discloses a carbon dioxide and water electrolysis reforming hydrogen production system, which comprises a first subsystem and a second subsystem. The first subsystem comprises a reversible solid oxide fuel cell 10, a gas mixing device 20 connected with an anode side pipeline of the reversible solid oxide fuel cell 10, a hydrogen storage container 30 and a water storage container 40 which are respectively connected with the gas mixing device 20 through pipelines; the second subsystem comprises a reverse water vapor conversion device 50 and a carbon dioxide storage container 60 connected with the reverse water vapor conversion device 50 through a pipeline; the hydrogen storage container 30 is provided with a pressure adjusting device 70, and the pressure adjusting device 70 is connected with the reverse water vapor conversion device 50 through a pipeline.
In the present embodiment, the characteristics of the reversible solid oxide fuel cell are utilized, and the corresponding operation mode is selected according to the environment in which the reversible solid oxide fuel cell is used. When the electric energy in the renewable energy power grid is in the low peak period of power utilization, the power grid has surplus electric power, the reversible solid oxide fuel cell works in an electrolysis mode, water is electrolyzed by the electric energy in the power grid, hydrogen is generated, and electrochemical energy storage is realized. And when the electric energy in the power grid is in the peak period of power utilization, the power grid has a power gap, and the reversible solid oxide fuel cell works in a cell mode, consumes hydrogen, generates electric energy and makes up the power gap of the power grid.
In this embodiment, when the amount of hydrogen electrolyzed by the reversible solid oxide fuel cell is large and needs to be stored, the synthesis reaction of hydrogen and carbon dioxide gas is performed by using the reverse water-gas shift reactor in the system to generate synthesis gas. The problem of large-scale hydrogen storage in the energy storage process of the reversible oxide fuel cell in the prior art is solved.
Specifically, when the storage amount in the hydrogen storage container 30 is greater than a set threshold value, for example, the threshold value may be set to be 50% to 70%, the pressure adjusting device 70 is started, hydrogen in the hydrogen storage container 30 is delivered into the reverse steam shift device 50, a steam-gas shift reaction catalyst is filled in the reverse steam shift device 50, and hydrogen and carbon dioxide are converted into carbon monoxide and water, so that the hydrogen storage amount in the hydrogen storage container is sufficient and the hydrogen is safely stored when the reversible solid oxide fuel cell is in the battery mode.
Further, the pressure of the hydrogen and carbon dioxide gas entering the reverse steam shift device 50 is from 3MPa to 5MPa, from 5MPa to 7MPa, from 7MPa to 9MPa, the temperature is from 220 ℃ to 240 ℃, from 240 ℃ to 260 ℃, from 260 ℃ to 280 ℃, and from 280 ℃ to 300 ℃. The volume flow ratio of hydrogen to carbon dioxide input to the reverse steam shift device 50 is 2 to 3.
In one or more embodiments, the first subsystem further comprises a first heat exchanger 11, and the first heat exchanger 11 is respectively connected with the gas mixing device 20 and the reversible solid oxide fuel cell 10 through pipelines.
Specifically, the first heat exchanger 11 is provided with a first flow channel and a second flow channel, wherein the first flow channel is used for introducing a mixture of water and hydrogen into the reversible solid oxide fuel cell 10, and the second flow channel is used for discharging a mixture of hydrogen and water from the reversible solid oxide fuel cell 10. And preheating the low-temperature hydrogen and water mixture in the first flow channel by using the high-temperature hydrogen and water mixture in the second flow channel to realize heat recovery.
In some embodiments, the carbon dioxide and water electrolysis reforming hydrogen production system further comprises a first water-gas separator 12, wherein an inlet end of the first water-gas separator 12 is connected with the first heat exchanger 11 in a pipeline manner, a gas outlet end is connected with the hydrogen storage container 30 in a pipeline manner, and a water outlet end is connected with the water storage container 40 in a pipeline manner.
Specifically, the mixture of hydrogen and water flowing out of the second flow passage of the first heat exchanger passes through the first water-gas separator 12 to separate hydrogen from water, the separated hydrogen flows into the hydrogen storage container 30 through a pipeline, and the separated water flows into the water storage container 40 through a pipeline. Both the water in the water storage container and the hydrogen in the hydrogen storage container can be used for the reversible solid oxide battery. Thus realizing the recycling of water in the system.
Further, a hydrogen compressor 13 is disposed between the hydrogen storage container 30 and the first moisture separator, and is configured to compress the separated hydrogen. A flow valve 15 is arranged between the hydrogen storage container 30 and the gas mixing device 20 and is used for controlling the flow of the hydrogen entering the gas mixing device 20.
In some embodiments, the air inlet of the reversible solid oxide fuel cell 10 is provided with a second heat exchanger 14.
Specifically, a heat exchanger is provided on the air side of the reversible solid oxide fuel cell 10, and the structure and type of the heat exchanger may be the same as or different from those of the first heat exchanger. By providing the second heat exchanger 14 to preheat the air, the air can be preheated to reduce energy loss because the inside of the reversible solid oxide fuel cell 10 is a high-temperature environment and the temperature of the air is relatively low. The air absorbs a certain amount of heat and then is introduced into the reversible solid oxide fuel cell 10.
In some embodiments, the second subsystem further comprises a second moisture separator 21 and a syngas storage container 22, wherein an inlet end of the second moisture separator 21 is connected to the reverse steam shift device 50 by a pipeline, a gas outlet end is connected to the syngas storage container 22 by a pipeline, and a water outlet end is connected to the water storage container 40 by a pipeline.
Specifically, in the reverse steam shift device 50, hydrogen to be stored and carbon dioxide are subjected to a synthesis reaction to generate synthesis gas, and the generated synthesis gas is subjected to a fischer-tropsch reaction, for example, to generate hydrocarbons which are easy to store. The reacted synthesis gas contains water, the water is separated by the second water-gas separator 21 and is introduced into the water storage container 40 through a pipeline, and the water is recycled.
In one embodiment, the system for producing hydrogen by reforming carbon dioxide with water electrolysis further comprises a third heat exchanger 23, wherein the inlet end of the third heat exchanger 23 is connected with the outlet end of the pressure regulating device 70 through a pipeline, and the inlet end of the third heat exchanger 23 is connected with the inlet end of the reverse steam shift device 50.
Specifically, the oxygen-enriched gas coming out from the air side of the reversible solid oxide fuel cell 10 contains high heat, and the oxygen-enriched gas can be used for heating the hydrogen through the third heat exchanger 23, so that the hydrogen enters the reverse water-vapor conversion device 50 after the temperature reaches the temperature required by the reaction, and further recycling of the heat is realized.
In some embodiments, a carbon dioxide compressor 24 is disposed between the carbon dioxide storage vessel 30 and the reverse water vapor shift device 50. The carbon dioxide gas in the carbon dioxide storage vessel is delivered to the reverse steam shift device by a carbon dioxide compressor 24.
In some embodiments, when the reversible solid oxide fuel cell is operated in an electrolysis mode, the mass flow ratio of water to hydrogen gas entering the gas mixing device is 30-45: 1. A small amount of hydrogen is mixed in to maintain sufficient reducibility of the anode gas to avoid oxidative deactivation of the catalytic particles.
In some embodiments, when the reversible solid oxide fuel cell is operated in the cell mode, only hydrogen gas is introduced into the gas mixing device.
To sum up, the utility model provides a carbon dioxide and water electrolysis reforming hydrogen production system, the system includes: the first subsystem comprises a reversible solid oxide fuel cell, a gas mixing device connected with an anode side pipeline of the reversible solid oxide fuel cell, and a hydrogen storage container and a water storage container which are respectively connected with the gas mixing device through pipelines; the second subsystem comprises a reverse water vapor conversion device and a carbon dioxide storage container connected with the reverse water vapor conversion device through a pipeline; the hydrogen storage container is provided with a pressure adjusting device, and the pressure adjusting device is connected with the reverse water-vapor conversion device through a pipeline. The fluctuation of a power grid is balanced through the reversible solid oxide fuel cell, for example, when the power grid has power surplus, the reversible solid oxide fuel cell utilizes electric energy in the power grid to electrolyze water to generate hydrogen and oxygen, and the waste of the electric energy is avoided. The water and the hydrogen in the system are stored in corresponding containers, wherein the water can be used as water for electrolysis, the requirement of an electrolysis mode on the water is saved, the hydrogen can be used for carrying out a synthetic reaction with carbon dioxide to generate hydrocarbon which is easy to store, and the problems of high hydrogen storage cost and easy leakage are solved. When the power grid has a power gap, the reversible solid oxide fuel cell supplies power for the power grid in a battery mode in an auxiliary mode, so that the rebalancing of the power grid is realized.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. A carbon dioxide and water electrolysis reforming hydrogen production system is characterized by comprising:
the first subsystem comprises a reversible solid oxide fuel cell, a gas mixing device connected with an anode side pipeline of the reversible solid oxide fuel cell, and a hydrogen storage container and a water storage container which are respectively connected with the gas mixing device through pipelines;
the second subsystem comprises a reverse water vapor conversion device and a carbon dioxide storage container connected with the reverse water vapor conversion device through a pipeline;
and the hydrogen storage container is provided with a pressure regulating device, and the pressure regulating device is connected with the reverse water-vapor conversion device through a pipeline.
2. The system for reforming production of hydrogen by carbon dioxide and water electrolysis according to claim 1, wherein the first subsystem further comprises a first heat exchanger, and the first heat exchanger is respectively connected with the gas mixing device and the reversible solid oxide fuel cell pipeline.
3. The system for reforming production of hydrogen by carbon dioxide and water electrolysis as claimed in claim 2, further comprising a first moisture separator, wherein the inlet end of the first moisture separator is connected with the first heat exchanger pipeline, the gas outlet end is connected with the hydrogen storage container pipeline, and the water outlet end is connected with the water storage container pipeline.
4. The system for hydrogen production by carbon dioxide and water electrolysis reforming as defined in claim 1, wherein the air inlet of the reversible solid oxide fuel cell is provided with a second heat exchanger.
5. The system for reforming the hydrogen production by the electrolysis of carbon dioxide and water as claimed in claim 1, wherein the second subsystem further comprises a second moisture separator and a synthesis gas storage container, the inlet end of the second moisture separator is connected with the reverse water-vapor conversion device through a pipeline, the gas outlet end is connected with the synthesis gas storage container through a pipeline, and the water outlet end is connected with the water storage container through a pipeline.
6. The system for reforming the hydrogen production by the electrolysis of carbon dioxide and water as claimed in claim 1, further comprising a third heat exchanger, wherein the inlet end of the third heat exchanger is connected with the outlet end pipeline of the pressure regulating device, and the inlet end of the third heat exchanger is connected with the inlet end of the reverse water-steam converting device.
7. The system for reforming production of hydrogen by carbon dioxide and water electrolysis according to claim 3, wherein a hydrogen compressor is arranged between the hydrogen storage container and the first moisture separator.
8. The system for hydrogen production through carbon dioxide and water electrolysis reforming as claimed in claim 5, wherein a carbon dioxide compressor is arranged between the carbon dioxide storage container and the reverse water-steam converting device.
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| CN202020182677.2U CN212113900U (en) | 2020-02-17 | 2020-02-17 | Carbon dioxide and water electrolysis reforming hydrogen production system |
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| CN202020182677.2U CN212113900U (en) | 2020-02-17 | 2020-02-17 | Carbon dioxide and water electrolysis reforming hydrogen production system |
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