CN210183021U - Electrolytic hydrogen production and ammonia synthesis system for nuclear power station - Google Patents
Electrolytic hydrogen production and ammonia synthesis system for nuclear power station Download PDFInfo
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- CN210183021U CN210183021U CN201920707725.2U CN201920707725U CN210183021U CN 210183021 U CN210183021 U CN 210183021U CN 201920707725 U CN201920707725 U CN 201920707725U CN 210183021 U CN210183021 U CN 210183021U
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Abstract
The utility model discloses a system for producing hydrogen and synthesizing ammonia by electrolysis in a nuclear power station, which comprises a nuclear power station, a power grid dispatching center, a hydrogen production device by electrolysis and a synthesis ammonia device; the power supply input end of the electrolytic hydrogen production device is electrically connected with the power generation output end of the nuclear power station; the hydrogen output end of the electrolytic hydrogen production device is connected with the hydrogen inlet of the ammonia synthesis equipment, and the nitrogen inlet of the ammonia synthesis equipment is connected with a nitrogen source; the power plant centralized control center is used for receiving a peak load regulation instruction sent by the nuclear power station, and the power grid is electrically connected with the power generation output end of the nuclear power station and used for receiving electric energy sent by the nuclear power station. Through the utility model discloses, realize hydrogen manufacturing, nitrogen making in the nuclear power station, then utilize nitrogen gas, the hydrogen of preparing to produce ammonia through the synthesis for the nuclear power station changes the electrochemical plant of multiple gas and fuel product into.
Description
Technical Field
The invention relates to the technical field of peak shaving and ammonia synthesis in a nuclear power station, in particular to an electrolytic hydrogen production and ammonia synthesis system in the nuclear power station.
Background
At the present stage, the electric energy output capacity in the electric power system in China is rich, peak-adjustable power sources such as a gas turbine and pumped storage are scarce, the contradiction between the peak adjustment of a power grid and the flexibility of a thermal power generating unit is prominent, and the capacity of the power grid for absorbing new energy such as wind power, photoelectricity, hydropower, nuclear power and the like is insufficient.
In the aspect of nuclear power, the fact that global nuclear power is not increased and weak is solved, and the speed of newly building a nuclear reactor is not higher than the speed of closing the nuclear power station. In such a disastrous situation, the relative strengths of the Chinese nuclear power are especially strong: the latest release of world energy prospect 2017 by the international energy agency considers that the prospect of global nuclear power development is still dim, but China can continue to lead the gradual development of nuclear power production. The "prospect" even predicts that by 2030, China surpasses the United states and becomes the largest nuclear power producing country. In the last two years, 2016 and 2017, however, the national energy agency has not approved new nuclear power projects for two consecutive years. In 2017, only two nuclear power generating units which are built before are connected to the power generation network in China. In addition, the mean utilization hours of nuclear power in the whole country in 2015 are reduced by 437 hours, the reduction amplitude reaches 5.6 percent, namely, 125 hundred million-degree electricity is generated, and the mean utilization hours of some nuclear power generating units are already reduced to 5000 hours.
Therefore, how to improve the peak load regulation capability of the nuclear power station becomes an important index for the future nuclear power development.
The hydrogen production by water electrolysis is an efficient and clean hydrogen production technology, the hydrogen production process is simple, the product purity is high, and the purity of hydrogen and oxygen can reach 99.9 percent generally, so that the hydrogen production technology is the most potential large-scale hydrogen production technology. Especially, with the increasing growth of clean energy power generation at present, hydrogen will become an ideal carrier for electric energy storage. Through with clean energy electricity generation through electrolysis water hydrogen manufacturing technique, the electric energy that produces clean energy is converted into hydrogen energy and is stored to according to actual need, still can be through follow-up chemical industry process with hydrogen energy conversion methane, methyl alcohol and other liquid fuel etc..
The ammonia is a very important chemical product for human beings, and with the development of society and the progress of industrial civilization, the contribution of the product of ammonia synthesis to human beings is obvious. Ammonia is considered a convenient hydrogen storage fuel for transportation by many research units and energy companies. The ammonia can be liquefied at the temperature of minus 20 ℃, and can be conveniently transported at low cost; in addition, ammonia is also a fuel and a refrigerating working medium, and can be used for combustion and refrigeration industries.
Therefore, if the surplus peak-shaving power of the nuclear power plant can be utilized, the nuclear power plant is transformed into a nuclear chemical plant which can produce various gases and chemical products besides the power production through the electrolytic hydrogen production and ammonia synthesis processes, and the profitability and the viability of the existing nuclear power plant are certainly greatly enhanced.
SUMMERY OF THE UTILITY MODEL
Aiming at the trend that more and more nuclear power is abandoned, the invention aims to provide an electrolytic hydrogen production and ammonia synthesis system for a nuclear power plant.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a nuclear power plant electrolytic hydrogen production synthetic ammonia system comprises a nuclear power plant, a power grid dispatching center, an electrolytic hydrogen production device and synthetic ammonia equipment; the power supply input end of the electrolytic hydrogen production device is electrically connected with the power generation output end of the nuclear power station; the hydrogen output end of the electrolytic hydrogen production device is connected with the hydrogen inlet of the ammonia synthesis equipment, and the nitrogen inlet of the ammonia synthesis equipment is connected with a nitrogen source; the ammonia gas output end of the synthetic ammonia equipment is communicated to a liquid ammonia storage tank; the nuclear power station also comprises a power plant centralized control center, wherein the power plant centralized control center is used for receiving a peak load regulation instruction sent by the nuclear power station, and the power grid is electrically connected with the power generation output end of the nuclear power station and used for receiving electric energy sent by the nuclear power station.
Preferably, the nitrogen source comprises an air separation plant, a power input end of the air separation plant is connected to a power generation output end of the nuclear power plant to obtain the peak shaving surplus electric quantity of the nuclear power plant as a power source, and a nitrogen output end of the air separation plant is connected to a nitrogen inlet of the synthetic ammonia equipment.
Preferably, the oxygen output end of the electrolytic hydrogen production device is communicated with an oxygen storage tank; the hydrogen output end of the electrolytic hydrogen production device is also connected to the hydrogen storage tank through an ultralow temperature liquefying device or a high-pressure gas compressing device, and the hydrogen output end is used for outputting hydrogen which is not input into the synthetic ammonia equipment to the hydrogen storage tank in the form of ultralow temperature liquid hydrogen or high-pressure compressed gaseous hydrogen.
Preferably, the hydrogen output end or the hydrogen storage tank of the electrolytic hydrogen production device is communicated with the external hydrogen conveying pipeline, and the hydrogen is directly conveyed to the outside through the external hydrogen conveying pipeline.
Preferably, the oxygen output end of the air separation unit is communicated with an oxygen storage tank, and the nitrogen output end of the air separation unit is also communicated with a nitrogen storage tank, so as to output nitrogen which is not input into the ammonia synthesis equipment to the nitrogen storage tank.
Preferably, the electrolytic hydrogen production device adopts any one of an alkaline aqueous solution electrolytic hydrogen production device, a solid polymer electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device.
Preferably, the water inlet of the electrolytic hydrogen production device is communicated with a chemical water treatment workshop of the nuclear power plant through a water replenishing pump, and the chemical water treatment workshop of the nuclear power plant is communicated with the water replenishing pump through a pure water preparation device.
Preferably, the power generation output end of the nuclear power station is the output end of a generator, the output end of the generator is electrically connected to the power input end of the electrolytic hydrogen production device through a first inverter, and the power generation output end of the nuclear power station is also electrically connected to the power input end of the air separation device through a second inverter.
The peak-shaving frequency-modulation nuclear chemical plant is provided with the nuclear power plant electrolytic hydrogen production ammonia synthesis system, the produced products are one or more of electric power, heat, hydrogen, nitrogen, oxygen and ammonia, and one or more of the hydrogen, the nitrogen, the oxygen and the ammonia are respectively connected with a corresponding gas storage tank through a gas purification device, so that low-temperature liquefaction or high-pressure storage of one or more of the hydrogen, the nitrogen, the oxygen and the ammonia is realized.
Preferably, the production device for one or more of hydrogen, nitrogen, oxygen and ammonia is connected with corresponding high-pressure or low-temperature liquefied steel cylinder filling equipment through a gas purification device, and one or more of hydrogen, nitrogen, oxygen and ammonia gas are sold through steel cylinder filling.
The invention has the beneficial effects that: the electrolytic hydrogen production and ammonia synthesis system for the nuclear power station can make full use of peak-shaving frequency modulation power to realize hydrogen production and nitrogen production in the nuclear power plant, and then produce ammonia by synthesis of the produced nitrogen and hydrogen, so that the nuclear power station is converted into an electrochemical industrial factory of various gases and fuel products, and various gases such as hydrogen, nitrogen, ammonia, oxygen and the like are sold and output externally, and particularly, hydrogen and ammonia are used as fuels with zero carbon emission, and the electrolytic hydrogen production and ammonia synthesis system has wide application prospect in the future.
The electrolytic hydrogen production ammonia synthesis system of the nuclear power station provided by the invention converts the electric energy at the electricity consumption valley stage into the hydrogen energy by acquiring the electric energy at the electricity consumption valley stage, and then performs the ammonia synthesis process on the hydrogen energy and the nitrogen gas, so that the hydrogen energy is converted into the chemical energy of the ammonia fuel which is easy to transport and store, the electric energy storage is realized in a phase-changing manner, and the traditional nuclear power plant is converted into an energy plant for producing various gas products.
In addition, the electrolytic hydrogen production ammonia synthesis system of the nuclear power plant provided by the invention can directly consume the peak regulation surplus electric quantity of the nuclear power plant, indirectly utilizes the abandoned wind, abandoned light, abandoned water and abandoned nuclear power, relieves the problems of power grid balance and peak-valley difference, prolongs the service life of equipment of the nuclear power plant, realizes the phase-change storage of electric energy, and realizes the stable storage and effective utilization of energy.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a fifth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a seventh embodiment of the present invention;
fig. 8 is a schematic structural diagram of an eighth embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.
Example one
As shown in fig. 1, an electrolytic hydrogen production and ammonia synthesis system for a nuclear power plant comprises a nuclear power plant 1, a power grid 2, a power grid dispatching center 3, an electrolytic hydrogen production device 4 and ammonia synthesis equipment 6; the power supply input end of the electrolytic hydrogen production device 4 is electrically connected with the power generation output end of the nuclear power station 1; the hydrogen output end of the electrolytic hydrogen production device 4 is connected with the hydrogen inlet of the ammonia synthesis equipment 6, and the nitrogen inlet of the ammonia synthesis equipment 6 is connected with the nitrogen source 5; the ammonia gas output end of the synthetic ammonia equipment 6 is communicated to a liquid ammonia storage tank 7; the nuclear power station 1 further comprises a power plant centralized control center 11, the power plant centralized control center 11 is used for receiving a peak load regulation instruction sent by the nuclear power station 1, and the power grid 2 is electrically connected with the power generation output end of the nuclear power station 1 and used for receiving electric energy sent by the nuclear power station 1.
The working principle of the electrolytic hydrogen production ammonia synthesis system for the nuclear power station is as follows: generally, a power grid dispatching center sends a peak load regulation instruction to a power plant centralized control center of a nuclear power plant according to the demand conditions of real-time power generation and peak load regulation in a region, and the power plant centralized control center of the nuclear power plant controls and adjusts the peak load regulation and frequency regulation balance electric quantity of the nuclear power plant according to the peak load regulation instruction. In the system for synthesizing ammonia by hydrogen electrolysis in the nuclear power station, the peak-load frequency-modulation surplus electricity of the nuclear power station provides a power supply for the hydrogen electrolysis device, and the hydrogen produced by the hydrogen electrolysis device is conveyed to the ammonia synthesis equipment. The synthesis ammonia equipment obtains hydrogen from the electrolytic hydrogen production device and nitrogen from a nitrogen source, and then synthesizes the hydrogen and the nitrogen at high temperature and high pressure to obtain ammonia gas, wherein the ammonia gas can be stored in a liquid ammonia storage tank or filled into bottles for selling.
By the system for producing hydrogen and synthesizing ammonia by electrolysis in the nuclear power station, hydrogen obtained by preparing peak-load frequency-modulation surplus electricity of the nuclear power station can be utilized and further synthesized to obtain ammonia, so that the nuclear power station is converted into a chemical plant which can produce raw materials for synthesizing ammonia.
Example two
As shown in fig. 2, on the basis of the first embodiment, the power generation device of the nuclear power plant comprises a nuclear island and a conventional island, wherein the nuclear island comprises a nuclear reactor 19, and the conventional island comprises a power generator 12, a steam turbine 13, a condenser 14, a low-pressure heater 15, a deaerator 16, a high-pressure heater 17 and a steam generator 18; the power input end of the electrolytic hydrogen production device 4 is connected with the power output end of the generator 12, and the generator 12 supplies power to the electrolytic hydrogen production device by adopting peak-shaving frequency-modulation surplus electric quantity.
EXAMPLE III
As shown in fig. 3, in the second embodiment, the nitrogen gas source 5 is an air separation unit 51, a power input end of the air separation unit 51 is connected to a power generation output end of the nuclear power plant, in this embodiment, a power generator 12, and a nitrogen output end of the air separation unit 51 is connected to a nitrogen gas inlet of the ammonia synthesis plant 6.
The air separation device 51 is adopted for nitrogen production, the peak-load frequency-modulation surplus electric quantity of the nuclear power station is used as an electric energy source, the component cost of purchasing nitrogen from the outside can be saved, the surplus electric quantity of the nuclear power station is further fully utilized, and the utilization rate of energy is further improved. In practical application, a cryogenic air separation nitrogen production device, a pressure swing adsorption air separation device or a membrane separation air separation device can be adopted.
Example four
As shown in fig. 4, in the third embodiment, the oxygen output end of the electrolytic hydrogen production device 4 is connected to an oxygen storage tank 41. The oxygen output of the air separation unit 51 is also connected to the oxygen tank 41. Oxygen generated in the hydrogen and nitrogen production process is stored through the oxygen storage tank and can be sold after being filled.
EXAMPLE five
As shown in fig. 5, in addition to the fourth embodiment, the hydrogen output end of the hydrogen electrolysis production device 4 is further connected to a hydrogen storage tank 43 through an ultra-low temperature liquefaction device or a high-pressure gas compression device 42, and is used for outputting hydrogen not input into the ammonia synthesis equipment to the hydrogen storage tank 43 in the form of ultra-low temperature liquid hydrogen or high-pressure compressed gaseous hydrogen. The hydrogen gas which is not immediately used for preparing ammonia gas in the hydrogen production process can be stored in the hydrogen storage tank 43 firstly, can be sold to the outside, and can be used for continuously providing hydrogen gas for preparing ammonia subsequently.
In addition, the hydrogen output end or the hydrogen storage tank of the electrolytic hydrogen production device can also be communicated with an external hydrogen conveying pipeline, and the hydrogen is directly conveyed to the outside through the external hydrogen conveying pipeline.
The electrolytic hydrogen production device 4 and the air separation device 51 can respectively introduce hydrogen and nitrogen into the ammonia synthesis equipment 6 through flow valves. The flow valve can realize the introduction of hydrogen and nitrogen into the ammonia synthesis equipment according to the preset proportion of hydrogen and ammonia, thereby not only ensuring the effect of ammonia production, but also avoiding the waste of hydrogen and nitrogen.
EXAMPLE six
As shown in fig. 6, in addition to the fifth embodiment, the nitrogen output end of the air separation unit 51 is also communicated with a nitrogen storage tank 61, and is used for outputting nitrogen which is not input into the ammonia synthesis plant to the nitrogen storage tank 61. Similarly, the nitrogen gas not immediately used for ammonia gas production in the nitrogen production process may be stored in the nitrogen gas storage tank 61, and may be sold after being filled, or may be continuously supplied with nitrogen gas for ammonia production.
Further, the electrolytic hydrogen production device 4 can adopt an alkaline aqueous solution electrolytic hydrogen production device, a solid polymer electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device.
EXAMPLE seven
As shown in fig. 7, in addition to the fifth embodiment, the water inlet of the electrolytic hydrogen production apparatus 4 is connected to a chemical water treatment plant 1a of the nuclear power plant via a makeup water pump 1c, and the chemical water treatment plant 1a of the nuclear power plant is connected to the makeup water pump 1c via a pure water production apparatus 1 b.
Example eight
As shown in fig. 8, in addition to the seventh embodiment, the power generation output end of the nuclear power plant, in this embodiment, specifically, the output end of the generator 12, is electrically connected to the power input end of the electrolytic hydrogen production apparatus 4 specifically through the first inverter 44, and the power generation output end of the nuclear power plant is also electrically connected to the power input end of the air separation apparatus 51 through the second inverter 52.
Example nine
In this example, no air separation unit was provided, all nitrogen was purchased directly from the outside, and oxygen was generated from the electrolytic hydrogen production unit. The other components and functions of the system and the final product are the same as those of the eighth embodiment.
The utility model also provides a peak regulation frequency modulation nuclear power chemical plant, peak regulation frequency modulation nuclear power chemical plant has aforementioned nuclear power station electrolysis hydrogen manufacturing synthetic ammonia system, and the product of its production is one or more in electric power, heating power, hydrogen, nitrogen gas, oxygen, the ammonia, one or more in hydrogen, nitrogen gas, oxygen, the ammonia passes through gas purification device and connects corresponding gas storage tank respectively, realizes one or more low temperature liquefaction or high-pressure storage in hydrogen, nitrogen gas, oxygen, the ammonia.
The production device of one or more of hydrogen, nitrogen, oxygen and ammonia is connected with corresponding high-pressure or low-temperature liquefied steel cylinder filling equipment through a gas purification device, and one or more of hydrogen, nitrogen, oxygen and ammonia is sold through steel cylinder filling.
Various changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (8)
1. An electrolytic hydrogen production and ammonia synthesis system for a nuclear power plant is characterized by comprising a nuclear power plant (1), a power grid (2), a power grid dispatching center (3), an electrolytic hydrogen production device (4) and ammonia synthesis equipment (6); the power supply input end of the electrolytic hydrogen production device (4) is electrically connected with the power generation output end of the nuclear power station (1); the hydrogen output end of the electrolytic hydrogen production device (4) is connected to the hydrogen inlet of the ammonia synthesis equipment (6), and the nitrogen inlet of the ammonia synthesis equipment (6) is connected to the nitrogen source (5); the ammonia gas output end of the ammonia synthesis equipment (6) is communicated to a liquid ammonia storage tank (7); the nuclear power station (1) still includes power plant centralized control center (11), power plant centralized control center (11) are used for receiving the load instruction of adjusting peak that nuclear power station (1) sent, the electricity generation output electric connection of electric wire netting (2) and nuclear power station (1) is used for receiving the electric energy that nuclear power station (1) sent.
2. The system for electrolytically producing hydrogen and ammonia synthesis gas at nuclear power plants as recited in claim 1, wherein the nitrogen source (5) comprises an air separation unit (51), a power input end of the air separation unit (51) is connected to a power generation output end of the nuclear power plant (1) to obtain peak shaving balance electricity of the nuclear power plant as a power source, and a nitrogen output end of the air separation unit (51) is connected to a nitrogen inlet of the ammonia synthesis plant (6).
3. The system for the electrolytic hydrogen production and ammonia synthesis at nuclear power plants as claimed in claim 1, wherein the oxygen output end of the electrolytic hydrogen production device (4) is communicated with an oxygen storage tank (41); the hydrogen output end of the electrolytic hydrogen production device (4) is also connected to a hydrogen storage tank (43) through an ultralow temperature liquefying device or a high-pressure gas compressing device (42) and is used for outputting hydrogen which is not input into the ammonia synthesis equipment to the hydrogen storage tank (43) in the form of ultralow temperature liquid hydrogen or high-pressure compressed gaseous hydrogen.
4. The system for the electrolytic hydrogen production and ammonia synthesis at nuclear power plants as claimed in claim 3, wherein the hydrogen output end or the hydrogen storage tank (43) of the electrolytic hydrogen production device (4) is communicated with an external hydrogen conveying pipeline, and the hydrogen is directly conveyed to the outside through the external hydrogen conveying pipeline.
5. The system for the electrolytic hydrogen production and synthesis ammonia at nuclear power plant as claimed in claim 2, characterized in that the oxygen output end of the air separation plant (51) is communicated with an oxygen storage tank (41), and the nitrogen output end of the air separation plant (51) is also communicated with a nitrogen storage tank (61) for outputting nitrogen which is not input into the synthesis ammonia plant (6) to the nitrogen storage tank (61).
6. The system for synthesizing ammonia by electrolytic hydrogen production at nuclear power plant according to claim 1, characterized in that the electrolytic hydrogen production device (4) adopts any one of an alkaline aqueous solution electrolytic hydrogen production device, a solid polymer electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device.
7. The system for synthesizing ammonia by electrolytic hydrogen production at nuclear power plant according to claim 1, characterized in that the water inlet of the electrolytic hydrogen production device (4) is communicated with the chemical water treatment plant (1a) of the nuclear power plant (1) through a water replenishing pump (1c), and the chemical water treatment plant (1a) of the nuclear power plant (1) is communicated with the water replenishing pump (1c) through a pure water preparation device (1 b).
8. The system for the electrolytic hydrogen production and ammonia synthesis at nuclear power plants as claimed in claim 2, wherein the power generation output of the nuclear power plant is the output of a generator (12), the output of the generator (12) is electrically connected to the power input of the electrolytic hydrogen production plant (4) through a first inverter (44), and the power generation output of the nuclear power plant is also electrically connected to the power input of an air separation plant (51) through a second inverter (52).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113044855A (en) * | 2021-04-29 | 2021-06-29 | 南京工业大学 | Hydrogenation and synthetic ammonia system |
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| CN113044855A (en) * | 2021-04-29 | 2021-06-29 | 南京工业大学 | Hydrogenation and synthetic ammonia system |
| CN113044855B (en) * | 2021-04-29 | 2023-08-11 | 南京工业大学 | Hydrogenation and synthetic ammonia system |
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Address after: Room 201, 2 / F, building 12, No.18, Kechuang 13th Street, Daxing Economic and Technological Development Zone, Beijing 100176 Patentee after: HEPP Energy Environment Technology Co.,Ltd. Address before: 100176 Beijing branch of Daxing District economic and Technological Development Zone thirteen Street No. 18 Building No. 12 hospital Patentee before: Hep Energy and Environment Technology Co.,Ltd. |
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