CN211999936U - Energy storage system for coproduction of hydrogen and urea - Google Patents
Energy storage system for coproduction of hydrogen and urea Download PDFInfo
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- CN211999936U CN211999936U CN202020669183.7U CN202020669183U CN211999936U CN 211999936 U CN211999936 U CN 211999936U CN 202020669183 U CN202020669183 U CN 202020669183U CN 211999936 U CN211999936 U CN 211999936U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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Abstract
The utility model discloses an energy storage system for coproducing hydrogen and urea, which comprises a renewable energy power supply, an electrolytic hydrogen production device, a hydrogen storage tank, an oxygen storage tank, a synthetic ammonia reactor, an air separation device and a urea synthesis reactor; the input end of the electrolytic hydrogen production device is communicated with water, the oxygen output end of the electrolytic hydrogen production device is connected to the oxygen storage tank, the hydrogen output end of the electrolytic hydrogen production device is connected to the hydrogen storage tank, the output end of the hydrogen storage tank is connected to the hydrogen inlet of the synthetic ammonia reactor, the input end of the air separation device is communicated with air, the oxygen output end of the air separation device is connected to the oxygen storage tank, the nitrogen output end of the air separation device is connected to the nitrogen inlet of the synthetic ammonia reactor, the ammonia output end of the synthetic ammonia reactor is connected to the ammonia inlet of the; the electrolytic hydrogen production device and the synthetic ammonia reactor are powered by a renewable energy source power supply.
Description
Technical Field
The utility model relates to a renewable energy and hydrogen energy storage field, concretely relates to energy storage system of coproduction hydrogen and urea.
Background
Under the global environment of coping with climate change, in recent years, China actively promotes energy structure transformation, greatly increases the proportion of renewable energy in energy production and consumption, and gradually realizes the replacement of fossil energy. However, due to the fluctuation and intermittence of wind energy and solar energy and the imbalance between the spatial distribution of water, wind and light resources and energy demand in China, renewable energy sources cannot be completely absorbed by a network, and even the phenomena of water abandonment, wind abandonment and light abandonment in a large scale occur. In the future, with the further increase of the proportion of renewable energy sources, the pressure of the renewable energy sources to be consumed in the network is more remarkable. The energy storage is an important way for improving the utilization rate of renewable energy and realizing large-scale energy consumption and utilization. The electrolytic hydrogen production technology can adapt to the volatility and intermittence of renewable energy sources, can realize large-scale and low-cost storage of the renewable energy sources through hydrogen storage and utilization, and is one of the most promising energy storage modes.
At present, the construction of hydrogen energy infrastructure in China is weak, the hydrogen consumption market does not form a scale, and the problem that clean hydrogen prepared from a large amount of renewable energy cannot be completely and directly utilized is solved. The above problems can be effectively solved by chemical conversion co-production of chemicals by a suitable route, of which co-production of urea by synthesis of ammonia is an important conversion route. Ammonia is an efficient hydrogen carrier, and the downstream product urea is a chemical nitrogen fertilizer with larger use amount at present and occupies an important position in national economic production. In the traditional chemical industry, the synthesis ammonia usually adopts a Haebu method which needs high temperature, high pressure and combined action of an iron-based catalyst, has harsh reaction conditions and huge energy consumption, and is suitable for a large-scale centralized production mode. The plasma catalysis technology ionizes and decomposes nitrogen and hydrogen through discharge equipment under normal temperature and pressure to generate high-activity free radicals, and can realize ammonia synthesis under mild conditions through free radical reaction. The electrolytic hydrogen production is coupled with the plasma catalytic synthesis ammonia which is easy to realize small-scale distributed production, the flexible production and utilization of hydrogen can be realized, and the co-production of hydrogen urea can effectively cope with the hydrogen market change which is incomplete in development, and has important significance for eliminating fluctuation and intermittent renewable energy sources.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an energy storage system of coproduction hydrogen and urea to overcome the problem that exists among the prior art, the utility model discloses utilize renewable energy networking residual capacity, realize electrolysis hydrogen manufacturing in the power plant, then through coupling synthetic ammonia and carbon capture technology coproduction urea, accomplished carbon dioxide entrapment and utilization when realizing the energy storage.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an energy storage system for coproducing hydrogen and urea comprises a renewable energy source power supply, an electrolytic hydrogen production device, a hydrogen storage tank, an oxygen storage tank, an ammonia synthesis reactor, an air separation device and a urea synthesis reactor;
the input end of the electrolytic hydrogen production device is communicated with water, the oxygen output end of the electrolytic hydrogen production device is connected to the oxygen storage tank, the hydrogen output end of the electrolytic hydrogen production device is connected to the hydrogen storage tank, the output end of the hydrogen storage tank is connected to the hydrogen inlet of the synthetic ammonia reactor, the input end of the air separation device is communicated with air, the oxygen output end of the air separation device is connected to the oxygen storage tank, the nitrogen output end of the air separation device is connected to the nitrogen inlet of the synthetic ammonia reactor, the ammonia output end of the synthetic ammonia reactor is connected to the ammonia inlet of the; the electrolytic hydrogen production device and the synthetic ammonia reactor are powered by a renewable energy source power supply.
Further, the hydrogen storage tank and the oxygen storage tank are both connected with an external conveying pipeline.
Further, the flue gas is flue gas generated in a combustion process of coal, natural gas, biomass or sludge.
Further, the electrolytic hydrogen production device is an alkaline water electrolytic hydrogen production device, a solid polymer electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device.
Further, the reactor for synthesizing ammonia is a plasma catalytic reactor.
Further, the reactor for synthesizing ammonia is a flat plate type or a tubular type.
Furthermore, the renewable energy power input end is connected with the power generation output end of the renewable energy power plant to obtain the remaining power of the network.
Further, the renewable energy power plant is a hydroelectric power plant, a wind power plant, a photovoltaic power plant or a photothermal power plant.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses an energy storage system of coproduction hydrogen and urea is when concrete operation, renewable energy power is electrolysis hydrogen plant and synthetic ammonia reactor power supply, electrolysis hydrogen plant makes hydrogen and oxygen through the brineelectrolysis, hydrogen and oxygen let in hydrogen storage tank and oxygen storage tank respectively, air separation plant lets in the oxygen storage tank through the oxygen that the seperation air obtained simultaneously, the nitrogen gas that the seperation air obtained passes through synthetic ammonia reactor, synthetic ammonia reactor utilizes hydrogen and nitrogen gas synthetic ammonia, the ammonia passes through in the urea synthesis reactor, ammonia and the carbon dioxide in the flue gas take place to react and generate urea in the urea synthesis reactor, turn into hydrogen fuel and chemicals with the electric energy, can consume renewable energy in a flexible way and go into net residual capacity, effectively solve the light problem of abandoning water wind that worsens day by day seriously.
Further, the utility model discloses a plasma catalysis technique reduces synthetic ammonia reaction energy consumption, is favorable to realizing distributing type and intermittent type nature production mode simultaneously, accords with renewable energy's energy storage demand.
Further, the utility model discloses regard as raw materials with ammonia reaction synthetic urea with the flue gas, realize low-cost carbon dioxide capture and resource utilization, have good emission reduction effect.
Drawings
FIG. 1 is a schematic diagram of an energy storage system for co-producing hydrogen and urea.
The method comprises the following steps of 1-renewable energy power supply, 2-electrolytic hydrogen production device, 3-hydrogen storage tank, 4-oxygen storage tank, 5-synthetic ammonia reactor, 6-air separation device and 7-urea synthesis reactor.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
referring to fig. 1, the energy storage system for co-producing hydrogen and urea of the present invention comprises a renewable energy source 1, an electrolytic hydrogen production apparatus 2, a hydrogen storage tank 3, an oxygen storage tank 4, a synthetic ammonia reactor 5, an air separation apparatus 6, and a urea synthesis reactor 7.
The electrolytic hydrogen production device 2 produces hydrogen and oxygen by electrolyzing water, the oxygen output end is connected with the oxygen storage tank 4, and the hydrogen output end is connected with the hydrogen storage tank 3; the output end of the hydrogen storage tank 3 is connected with the hydrogen inlet of the synthetic ammonia reactor 5; the oxygen output end of the air separation device 6 is connected with the oxygen storage tank 3, and the nitrogen output end is connected with the nitrogen inlet of the synthetic ammonia reactor 5; the synthetic ammonia reactor 5 utilizes hydrogen and nitrogen to synthesize ammonia, and the ammonia output end is connected with the ammonia inlet of the urea synthesis reactor 7; the ammonia reacts with the carbon dioxide in the flue gas in the urea synthesis reactor 7 to produce urea.
The hydrogen storage tank 3 and the oxygen storage tank 4 are communicated with an external conveying pipeline, and the hydrogen and the oxygen are directly conveyed outwards through the external conveying pipeline. When the hydrogen yield is lower than the market demand, all hydrogen is sold as a final product; when the hydrogen yield is higher than the market demand, the surplus hydrogen is used as a raw material to carry out ammonia synthesis reaction, and urea is produced at the same time, so that the surplus hydrogen is converted into chemicals to be utilized. The oxygen generated by the electrolytic hydrogen production device 2 and the air separation device 6 has high purity and can be directly sold as high-quality chemicals.
The flue gas is generated in the combustion process of coal, natural gas, biomass, sludge and the like. The flue gas contains a large amount of carbon dioxide, which is an important greenhouse gas source and is also a raw material for synthesizing urea. The flue gas is introduced into a urea synthesis reactor 7, wherein the carbon dioxide reacts with ammonia gas to generate urea, so that the capture and resource utilization of the carbon dioxide are realized.
The electrolytic hydrogen production device 2 adopts any one of an alkaline water electrolytic hydrogen production device, a solid polymer electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device.
The synthetic ammonia reactor 5 is a plasma catalytic reactor, low-temperature plasma is generated by adopting a dielectric barrier discharge technology, and the catalyst is a Ru-based catalyst loaded by Al2O 3.
The synthetic ammonia reactor 5 is one of a flat plate type or a tubular type, the reaction temperature is 80-150 ℃ and the reaction pressure is 0.1-0.3 MPa; the dielectric barrier discharge voltage is 40-60 kV, the discharge power is 5-20 kJ/L, and the resonance frequency is 8-12 kHz. The plasma catalysis technology is adopted, the requirements of high temperature and high pressure of the traditional synthetic ammonia can be avoided, and small-scale and distributed production is easy to realize. The low-temperature plasma is generated by adopting a dielectric barrier discharge technology, the generation and the suspension of the synthetic ammonia reaction can be flexibly controlled by only controlling the power supply, and the intermittent operation requirement in the energy storage process is met.
The electrolytic hydrogen production device 2 and the synthetic ammonia reactor 6 are directly powered by the renewable energy source 1. The input end of the renewable energy power supply 1 is connected with the power generation output end of the renewable energy power plant to obtain the networking residual electric quantity, and the renewable energy power plant is any one of a hydraulic power plant, a wind power plant, a photovoltaic power plant or a photo-thermal power plant. When the generated energy of the renewable energy is lower than the scheduling electric quantity of the power grid, all the electric quantity enters the grid to guarantee the power supply; when the power generation amount of the renewable energy is higher than the dispatching power amount of the power grid, the net-connected residual power amount enters the energy storage system to be used for hydrogen production and ammonia synthesis through electrolysis, and water, wind and light abandonment caused by power limitation is avoided.
Claims (8)
1. An energy storage system for coproducing hydrogen and urea is characterized by comprising a renewable energy source power supply (1), an electrolytic hydrogen production device (2), a hydrogen storage tank (3), an oxygen storage tank (4), an ammonia synthesis reactor (5), an air separation device (6) and a urea synthesis reactor (7);
the input end of the electrolytic hydrogen production device (2) is communicated with water, the oxygen output end is connected to the oxygen storage tank (4), the hydrogen output end is connected to the hydrogen storage tank (3), the output end of the hydrogen storage tank (3) is connected to the hydrogen inlet of the synthetic ammonia reactor (5), the input end of the air separation device (6) is communicated with air, the oxygen output end is connected to the oxygen storage tank (4), the nitrogen output end is connected to the nitrogen inlet of the synthetic ammonia reactor (5), the ammonia output end of the synthetic ammonia reactor (5) is connected to the ammonia inlet of the urea synthesis reactor (7), and the urea synthesis reactor (7) is also provided with a flue gas inlet for introducing flue gas; the electrolytic hydrogen production device (2) and the synthetic ammonia reactor (5) are powered by a renewable energy source power supply (1).
2. An energy storage system for co-production of hydrogen and urea according to claim 1, characterized in that both the hydrogen storage tank (3) and the oxygen storage tank (4) are connected with external delivery pipes.
3. The energy storage system for co-producing hydrogen and urea of claim 1, wherein the flue gas is flue gas generated during combustion of coal, natural gas, biomass or sludge.
4. The energy storage system for co-producing hydrogen and urea according to claim 1, wherein the electrolytic hydrogen production device (2) is an alkaline water electrolytic hydrogen production device, a solid polymer electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device.
5. An energy storage system for the co-production of hydrogen and urea according to claim 1, characterized in that said reactor (5) for the synthesis of ammonia is a plasma catalytic reactor.
6. An energy storage system for the co-production of hydrogen and urea according to claim 5, characterized in that said reactor (5) for synthesis ammonia is of the flat or tubular type.
7. The energy storage system for combined production of hydrogen and urea according to claim 1, characterized in that the input end of the renewable energy power source (1) is connected with the power generation output end of a renewable energy power plant to obtain the remaining power of the power grid.
8. The energy storage system for combined production of hydrogen and urea according to claim 7, wherein said renewable energy power plant is a hydroelectric power plant, a wind power plant, a photovoltaic power plant or a photothermal power plant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020669183.7U CN211999936U (en) | 2020-04-27 | 2020-04-27 | Energy storage system for coproduction of hydrogen and urea |
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| CN202020669183.7U CN211999936U (en) | 2020-04-27 | 2020-04-27 | Energy storage system for coproduction of hydrogen and urea |
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| CN211999936U true CN211999936U (en) | 2020-11-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218048A1 (en) * | 2020-04-27 | 2021-11-04 | 中国华能集团清洁能源技术研究院有限公司 | Energy storage system and method for co-producing hydrogen and urea |
| CN113818028A (en) * | 2020-11-06 | 2021-12-21 | 中国石油大学(北京) | Method for utilizing green source electricity |
| CN115536553A (en) * | 2022-09-20 | 2022-12-30 | 北京清新环境技术股份有限公司 | Carbon emission reduction system utilizing coupling of carbon dioxide in flue gas and electrolytic hydrogen production |
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2020
- 2020-04-27 CN CN202020669183.7U patent/CN211999936U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218048A1 (en) * | 2020-04-27 | 2021-11-04 | 中国华能集团清洁能源技术研究院有限公司 | Energy storage system and method for co-producing hydrogen and urea |
| CN113818028A (en) * | 2020-11-06 | 2021-12-21 | 中国石油大学(北京) | Method for utilizing green source electricity |
| CN115536553A (en) * | 2022-09-20 | 2022-12-30 | 北京清新环境技术股份有限公司 | Carbon emission reduction system utilizing coupling of carbon dioxide in flue gas and electrolytic hydrogen production |
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