CN116730359A - Flexibly-controlled green energy ammonia production system and green energy ammonia production method - Google Patents
Flexibly-controlled green energy ammonia production system and green energy ammonia production method Download PDFInfo
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- CN116730359A CN116730359A CN202310873890.6A CN202310873890A CN116730359A CN 116730359 A CN116730359 A CN 116730359A CN 202310873890 A CN202310873890 A CN 202310873890A CN 116730359 A CN116730359 A CN 116730359A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 249
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 140
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 120
- 239000001257 hydrogen Substances 0.000 claims abstract description 340
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 340
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 312
- 238000003860 storage Methods 0.000 claims abstract description 91
- 238000010248 power generation Methods 0.000 claims abstract description 39
- 230000005611 electricity Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 249
- 229910052757 nitrogen Inorganic materials 0.000 claims description 151
- 230000001105 regulatory effect Effects 0.000 claims description 96
- 239000007789 gas Substances 0.000 claims description 52
- 230000015572 biosynthetic process Effects 0.000 claims description 45
- 238000003786 synthesis reaction Methods 0.000 claims description 45
- 238000001816 cooling Methods 0.000 claims description 24
- 150000002431 hydrogen Chemical class 0.000 claims description 19
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 238000005868 electrolysis reaction Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 12
- 239000003507 refrigerant Substances 0.000 claims description 12
- 239000002918 waste heat Substances 0.000 claims description 12
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 206010017472 Fumbling Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/04—Preparation of ammonia by synthesis in the gas phase
- C01C1/0405—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst
- C01C1/0447—Apparatus other than synthesis reactors
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/04—Preparation of ammonia by synthesis in the gas phase
- C01C1/0405—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst
- C01C1/0482—Process control; Start-up or cooling-down procedures
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
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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
Abstract
The invention discloses a flexible control green energy ammonia production system and a green energy ammonia production method, wherein the flexible control green energy ammonia production process is adopted, photovoltaic energy and wind energy are used as green energy to be coupled at one time, and peak regulation and valley filling are carried out on high frequency and wide amplitude of the green energy; through secondary coupling of hydrogen storage and electricity storage, a series of control and adjustment are carried out by combining set parameters, so that the load of the green energy ammonia production device is ensured to be reduced or increased within a specified time, flexible load adjustment is realized, and the device is controlled to operate within a specified index. The invention combines early warning and flow regulation, can effectively reduce the influence of high-frequency and wide-amplitude fluctuation generated in the photovoltaic power generation and wind power generation processes on the ammonia production process of the green energy, realizes the linear relationship of low frequency and microwave amplitude, and ensures the flexible regulation of ammonia production of the green energy, thereby reducing the influence of high-peak trough and high-frequency fluctuation of the green energy on the stable operation of the device.
Description
Technical Field
The invention relates to a flexible control green energy ammonia production system and a green energy ammonia production method, and belongs to the technical field of green ammonia synthesis.
Background
The production of liquid ammonia mainly uses fossil energy sources such as natural gas, coal and the like as an original production process, and a large amount of carbon dioxide is discharged every ton of liquid ammonia produced by the process, especially the technology of producing ammonia in the coal industry, and the discharged carbon dioxide amount is higher than 4.2 tons/ton of ammonia. The green energy ammonia production process is to adopt green energy (renewable energy sources such as light, wind and the like for power generation) as energy, water and air as raw materials to produce liquid ammonia, and the carbon dioxide emission amount in the whole process is almost zero.
The green energy ammonia production process is an emerging greening chemical process, and a complete set of processes from green energy to ammonia synthesis are in fumbling, so that in order to stabilize the production of a green ammonia synthesis device, the general idea is that electricity generated by the green energy enters a national power grid, and then a stable power supply of the national power grid is used for producing hydrogen, producing nitrogen and synthesizing ammonia through water electrolysis; based on electricity, the electricity consumption per ton of ammonia is about 10500-11000 kw, wherein the electricity consumption per ton of ammonia is more than 90% of the electricity consumption per ton of ammonia due to hydrogen production by water electrolysis; if the environment-friendly energy ammonia production capacity is large and the device is more, larger impact can be brought to the stable operation of the national power grid, and the problem of stable power utilization is difficult to solve.
The current ammonia production by green energy has the great disadvantage that the photovoltaic power generation can only generate power in stages due to day and night factors; meanwhile, illumination and weather factors exist, and the generating capacity difference of different time periods in the daytime is also large; wind power generation also has wind fields in different time periods, and the power generation has great difference due to wind factors; however, in the case of an ammonia plant (chemical plant), the more stable the raw material supply is, the more stable and safer the plant is operated, for example, the plant cannot be suddenly reduced from 100% load to 30% load or the 30% load can be suddenly increased to 100% load in a short time. The prior art green energy ammonia production process cannot solve the problems at present, so that the large-scale production of the green energy ammonia production process is greatly limited.
Disclosure of Invention
The invention aims to provide a flexibly controlled green energy ammonia production system which is used for reducing the influence of high-frequency and wide-amplitude fluctuation generated in the photovoltaic power generation and wind power generation processes on the green energy ammonia production process, realizing the linear relation of low frequency and microwave amplitude and realizing the flexible regulation of the green energy ammonia production. Meanwhile, the invention also provides a flexible control green energy ammonia production method.
The invention discloses a flexibly controlled green energy ammonia production system, which adopts the following technical scheme: a flexible control's green energy system ammonia system, its characterized in that: the device comprises a green energy module, a hydrogen production, hydrogen storage and automatic control module, a nitrogen production module, a hydrogen-nitrogen compression and control module and an ammonia synthesis device, wherein the green energy module comprises a photovoltaic energy group and a wind energy group which are connected in parallel; the hydrogen production, hydrogen storage and automatic control module comprises an electrolytic hydrogen production device, a hydrogen outlet of the electrolytic hydrogen production device is connected with a hydrogen output main pipeline, a hydrogen output auxiliary pipeline is connected in parallel on the hydrogen output main pipeline, a hydrogen storage regulating valve, a hydrogen booster, a hydrogen storage device and a hydrogen discharge regulating valve are sequentially arranged on the hydrogen output auxiliary pipeline along the gas flow direction, and a hydrogen total flowmeter and a hydrogen flowmeter are respectively arranged on the hydrogen main pipeline before and after an inlet and an outlet of the hydrogen auxiliary pipeline; the hydrogen total flowmeter, the hydrogen storage regulating valve and the hydrogen booster are connected through signals; the hydrogen flowmeter is connected with the hydrogen discharge regulating valve through signals; the nitrogen production module comprises a nitrogen production device, a nitrogen pipeline is connected to a nitrogen outlet of the nitrogen production device, a nitrogen regulating valve and a nitrogen flowmeter are sequentially arranged on the nitrogen pipeline along the gas flow direction, and the nitrogen regulating valve is connected with the nitrogen flowmeter through signals; the hydrogen-nitrogen compression and control module comprises a hydrogen-nitrogen compressor, an outlet of a hydrogen output main pipeline and an outlet of a nitrogen pipeline are connected in parallel and then connected with an inlet of the hydrogen-nitrogen compressor, a mixed gas output pipeline is connected to the outlet of the hydrogen-nitrogen compressor, and a mixed gas flowmeter is arranged on the mixed gas output pipeline; the synthesis ammonia device is connected with a mixed gas output pipeline and comprises an air inlet adjusting pipeline, an air inlet adjusting valve is arranged on the air inlet adjusting pipeline, and the air inlet adjusting valve is connected with the mixed gas flowmeter through signals; the green energy module is used for supplying power to the electrolytic hydrogen production device, the hydrogen booster, the nitrogen production device and the hydrogen-nitrogen compressor.
And the power output end of the green energy module is connected with a power storage module, and the power storage module is used for supplying power to the electrolytic hydrogen production device, the hydrogen booster, the nitrogen production device and the hydrogen-nitrogen compressor.
And the output circuit after the photovoltaic energy group and the wind energy group are connected in parallel is provided with a real-time power generation multifunctional ammeter.
The synthesis ammonia device comprises an ammonia reactor, a waste heat recovery device, a heat exchanger and a cooling separator which are sequentially connected, wherein an exhaust port and a liquid ammonia discharge port are arranged on the cooling separator, a circulating pipeline is connected between the exhaust port and a refrigerant inlet of the heat exchanger, a circulating machine is arranged on the circulating pipeline, an outlet of a mixed gas output pipeline is connected to the circulating pipeline between the heat exchanger and the circulating machine, an inlet end of an air inlet regulating pipeline is connected to the circulating pipeline between the heat exchanger and an outlet of the mixed gas output pipeline, and an outlet of the air inlet regulating pipeline is connected to the pipeline between the heat exchanger and the cooling separator; the refrigerant outlet of the heat exchanger is communicated with the inlet of the ammonia reactor through a pipeline, and the heat medium inlet and the heat medium outlet of the heat exchanger are respectively connected with the outlet of the waste heat recovery device and the inlet of the cooling separator.
The flexible control green energy ammonia production method of the invention adopts the following technical scheme: a flexible control green energy ammonia production method comprises the following steps: (1) The photovoltaic energy group and the wind energy group are taken as green energy modules together, the installed capacities of the photovoltaic energy group and the wind energy group are matched in proportion according to the environment of the place, so that the green energy modules continuously generate electricity, and the generated energy of the photovoltaic energy group and the generated energy of the wind energy group in different time periods are combined; (2) The hydrogen production, hydrogen storage and flow regulation are carried out by utilizing a hydrogen production and self-control module, the hydrogen production and hydrogen storage and self-control module comprises an electrolytic hydrogen production device, a hydrogen outlet of the electrolytic hydrogen production device is connected with a hydrogen output main pipeline, a hydrogen output auxiliary pipeline is connected in parallel on the hydrogen output main pipeline, a hydrogen storage regulating valve, a hydrogen booster, a hydrogen storage device and a hydrogen discharge regulating valve are sequentially arranged on the hydrogen output auxiliary pipeline along the gas flow direction, and a hydrogen total flowmeter and a hydrogen flowmeter are respectively arranged on the hydrogen main pipeline before and after an inlet and an outlet of the hydrogen auxiliary pipeline; the hydrogen total flowmeter, the hydrogen storage regulating valve and the hydrogen booster are connected through signals; the hydrogen flowmeter is connected with the hydrogen discharge regulating valve through signals; (3) The nitrogen production module comprises a nitrogen production device, a nitrogen pipeline is connected to a nitrogen outlet of the nitrogen production device, a nitrogen regulating valve and a nitrogen flowmeter are sequentially arranged on the nitrogen pipeline along the gas flow direction, and the nitrogen regulating valve is connected with the nitrogen flowmeter through signals; (4) The hydrogen and nitrogen are compressed by utilizing a hydrogen-nitrogen compression and control module, the hydrogen-nitrogen compression and control module comprises a hydrogen-nitrogen compressor, an outlet of a hydrogen output main pipeline and an outlet of a nitrogen pipeline are connected in parallel and then are connected with an inlet of the hydrogen-nitrogen compressor, a mixed gas output pipeline is connected to an outlet of the hydrogen-nitrogen compressor, and a mixed gas flowmeter is arranged on the mixed gas output pipeline; (5) Connecting a synthesis ammonia device with a mixed gas output pipeline, wherein the synthesis ammonia device comprises an air inlet adjusting pipeline, an air inlet adjusting valve is arranged on the air inlet adjusting pipeline, and the air inlet adjusting valve is connected with the mixed gas flowmeter through signals; (6) The green energy module is connected with the hydrogen production, hydrogen storage and automatic control module, the nitrogen production module and the hydrogen-nitrogen compression and control module, so that the green energy module supplies power to the hydrogen booster, the nitrogen production device and the hydrogen-nitrogen compressor; (7) Setting a hydrogen value for the demand of the ammonia synthesis device, comparing the hydrogen values by utilizing the maximum hydrogen value of the water electrolysis, and when the hydrogen value of the water electrolysis is 100% higher than the demand of the ammonia synthesis device, automatically opening a hydrogen storage regulating valve, and simultaneously starting a hydrogen compressor to store part of hydrogen; when the hydrogen production amount is smaller than 80% of the hydrogen demand amount of the ammonia synthesizing device, the hydrogen compressor and the hydrogen storage regulating valve are automatically closed; the hydrogen total flowmeter is used as a main controller for cascade control in the hydrogen production and storage and automatic control module, the hydrogen total flowmeter sends real-time hydrogen flow data prepared by the hydrogen electrolysis device to a system control center, and the control center adjusts the opening of the hydrogen storage regulating valve according to the real-time hydrogen flow; the hydrogen flowmeter is used as a secondary controller for cascade control in the hydrogen production and storage and automatic control module, the hydrogen flowmeter sends real-time hydrogen flow to a system control center, and the control center adjusts the opening of the hydrogen release regulating valve according to the real-time hydrogen flow; (8) When the fluctuation of the hydrogen-nitrogen flowmeter exceeds +/-20% in 1-10 minutes, the flow signal at the moment is fed back to the air inlet regulating valve, the opening of the air inlet regulating valve is regulated to be automatically regulated to +/-5% - +/-10% according to the requirement, and the load fluctuation of the ammonia synthesis device is reduced.
The power supply system comprises a green energy module, a real-time power generation multifunctional ammeter, a power supply module and a power supply module, wherein the green energy module is connected with the power supply module, and when the real-time power generation multifunctional ammeter detects that the power supply of the green energy module is sufficient, the power supply module is used for storing redundant electric energy of the green energy module; when the real-time power generation multifunctional ammeter detects that the green energy module is insufficient in power supply, the power storage module is utilized to supply power to the hydrogen booster, the nitrogen making device and the hydrogen-nitrogen compressor.
The output circuit of the green energy module is provided with a real-time power generation multifunctional ammeter which is used for measuring the voltage, the power and the electric quantity of the green energy module which are supplied with power in real time.
The synthesis ammonia device comprises an ammonia reactor, a waste heat recovery device, a heat exchanger and a cooling separator which are sequentially connected, wherein an exhaust port and a liquid ammonia discharge port are arranged on the cooling separator, a circulating pipeline is connected between the exhaust port and a refrigerant inlet of the heat exchanger, a circulating machine is arranged on the circulating pipeline, an outlet of a mixed gas output pipeline is connected to the circulating pipeline between the heat exchanger and the circulating machine, an inlet end of an air inlet regulating pipeline is connected to the circulating pipeline between the heat exchanger and an outlet of a mixer output pipeline, and an outlet of the air inlet regulating pipeline is connected to the pipeline between the heat exchanger and the cooling separator; the refrigerant outlet of the heat exchanger is communicated with the inlet of the ammonia reactor through a pipeline, and the heat medium inlet and the heat medium outlet of the heat exchanger are respectively connected with the outlet of the waste heat recovery device and the inlet of the cooling separator.
The circulating machine is connected with a green energy module, and the green energy module supplies power to the circulating machine.
The beneficial effects of the invention are as follows: the invention adopts a flexible control green energy ammonia production process, and uses photovoltaic energy and wind energy as green energy to be coupled once, and carries out peak regulation and valley filling on high frequency and wide amplitude of the green energy; through secondary coupling of hydrogen storage and electricity storage, a series of control and adjustment are carried out by combining set parameters, so that the load of the green energy ammonia production device is ensured to be reduced or increased within a specified time, flexible load adjustment is realized, and the device is controlled to operate within a specified index. The invention combines early warning and flow regulation, can effectively reduce the influence of high-frequency and wide-amplitude fluctuation generated in the photovoltaic power generation and wind power generation processes on the ammonia production process of the green energy, realizes the linear relationship of low frequency and microwave amplitude, and ensures the flexible regulation of the ammonia production of the green energy, thereby reducing the influence of high-peak trough and high-frequency fluctuation of the green energy on the stable operation of the device and ensuring the efficient and stable operation of the ammonia production device of the green energy. The specific principle of the invention is as follows:
1. the invention combines the front photovoltaic power generation and the wind power generation, and the photovoltaic cannot generate power at night in the time period, so that the wind power generation is utilized to fill the valley; or the generated energy of wind power generation in the daytime period is greatly reduced, and the photovoltaic daytime power generation is utilized to fill the valley; energy storage is carried out by combining the photovoltaic and wind wave peak stages, and the energy storage is used for the photovoltaic and wind wave valley stages; that is, the green energy time above the average value is utilized to make up the time period that the green energy is lower than the average value, and the green energy is combined to eliminate peaks and fill valleys once.
2. The invention adopts cascade control of hydrogen flow (hydrogen value for the demand of the ammonia synthesis device is set, the maximum value of hydrogen production by utilizing water electrolysis is compared, when the water electrolysis hydrogen production amount is 100% higher than the demand of the ammonia synthesis device, a hydrogen storage regulating valve is automatically opened, a hydrogen compressor is started at the same time, the load of the hydrogen compressor runs from the lowest load, the storage and the production of redundant hydrogen are convenient, when the hydrogen production amount is less than 80% of the hydrogen demand of the ammonia synthesis device, the hydrogen storage regulating valve is automatically closed, and in the green energy wave peak (the electricity generation amount is about average value), the power generated by utilizing green energy is used for water electrolysis to obtain redundant hydrogen to be stored in the trough stage of green energy power generation, and secondary peak elimination and valley filling are carried out;
3. the invention controls the loop of the synthetic ammonia device, determines whether the air inlet regulating valve of the synthetic ammonia device is opened according to the flow value fed back by the hydrogen-nitrogen flowmeter, and opens the air inlet regulating valve to a specified valve degree according to set data if the air inlet regulating valve is required to be opened, so that the synthetic ammonia device can be ensured to stably run under ultra-low load.
Drawings
FIG. 1 is a flow chart of a flexibly controlled green energy ammonia production system in accordance with one embodiment of the present invention;
FIG. 2 is a graph of the amount of power generated after the photovoltaic power generation set and the wind power generation set of FIG. 1 are coupled.
In the figure: the device comprises a 1-green energy module, a 2-photovoltaic energy group, a 3-wind energy group, a 4-real-time power generation multifunctional meter, a 5-hydrogen production, hydrogen storage and automatic control module, a 6-electrolytic hydrogen production device, a 7-hydrogen total flow meter, an 8-hydrogen storage regulating valve, a 9-hydrogen booster, a 10-hydrogen storage device, an 11-hydrogen flow meter, a 12-hydrogen discharge regulating valve, a 13-nitrogen production module, a 14-nitrogen production device, a 15-nitrogen regulating valve, a 16-nitrogen flow meter, a 17-electricity storage module, a 18-hydrogen nitrogen compression and control module, a 19-hydrogen nitrogen compressor, a 20-mixed gas flow meter, a 21-air inlet regulating valve, a 22-synthetic ammonia device and a 23-circulator.
Description of the embodiments
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in fig. 1, the flexibly controlled green energy ammonia production system according to an embodiment of the present invention includes a green energy module 1, a hydrogen production, hydrogen storage and automatic control module 5, a nitrogen production module 13, a hydrogen nitrogen compression and control module 18, and a synthetic ammonia device 22, where the green energy module 1 includes a photovoltaic energy group 2 and a wind energy group 3 connected in parallel, and a real-time power generation multifunctional ammeter 4 is provided on an output circuit of the photovoltaic energy group 1 and the wind energy group 3 connected in parallel.
The hydrogen production, hydrogen storage and automatic control module 5 comprises an electrolytic hydrogen production device 6, a hydrogen outlet of the electrolytic hydrogen production device 6 is connected with a hydrogen output main pipeline, a hydrogen output auxiliary pipeline is connected in parallel on the hydrogen output main pipeline, a hydrogen storage regulating valve 8, a hydrogen booster 9, a hydrogen storage device 10 and a hydrogen discharge regulating valve 12 are sequentially arranged on the hydrogen output auxiliary pipeline along the gas flow direction, and a hydrogen total flowmeter 7 and a hydrogen flowmeter 11 are respectively arranged on the hydrogen main pipeline before and after an inlet and an outlet of the hydrogen auxiliary pipeline; the hydrogen total flowmeter 7, the hydrogen storage regulating valve 8 and the hydrogen booster 9 are connected through signals; the hydrogen flowmeter 11 is connected with the hydrogen discharge regulating valve 12 through signals.
The nitrogen making module 13 comprises a nitrogen making device 14, a nitrogen pipeline is connected to a nitrogen outlet of the nitrogen making device 14, a nitrogen regulating valve 15 and a nitrogen flowmeter 16 are sequentially arranged on the nitrogen pipeline along the gas flowing direction, and the nitrogen regulating valve 15 is connected with the nitrogen flowmeter 16 through signals.
The hydrogen-nitrogen compression and control module 18 comprises a hydrogen-nitrogen compressor 19, an outlet of a hydrogen output main pipeline and an outlet of a nitrogen pipeline are connected in parallel and then connected with an inlet of the hydrogen-nitrogen compressor 19, a mixed gas output pipeline is connected to an outlet of the hydrogen-nitrogen compressor 19, and a mixed gas flowmeter 20 is arranged on the mixed gas output pipeline.
The synthesis ammonia device 22 is connected with a mixed gas output pipeline, the synthesis ammonia device 22 comprises an air inlet adjusting pipeline, an air inlet adjusting valve 21 is arranged on the air inlet adjusting pipeline, and the air inlet adjusting valve 21 is connected with the mixed gas flowmeter 20 through signals; the synthesis ammonia device 22 comprises an ammonia reactor, a waste heat recovery device, a heat exchanger and a cooling separator which are sequentially connected, wherein an exhaust port and a liquid ammonia discharge port are arranged on the cooling separator, a circulating pipeline is connected between the exhaust port and a refrigerant inlet of the heat exchanger, a circulating machine 23 is arranged on the circulating pipeline, an outlet of the mixed gas output pipeline is connected to the circulating pipeline between the heat exchanger and the circulating machine 23, an inlet end of the air inlet regulating pipeline is connected to the circulating pipeline between the heat exchanger and an outlet of the mixed gas output pipeline, and an outlet of the air inlet regulating pipeline is connected to the pipeline between the heat exchanger and the cooling separator; the refrigerant outlet of the heat exchanger is communicated with the inlet of the ammonia reactor through a pipeline, and the heat medium inlet and the heat medium outlet of the heat exchanger are respectively connected with the outlet of the waste heat recovery device and the inlet of the cooling separator.
The green energy module 1 is used for supplying power to the electrolytic hydrogen production device 6, the hydrogen booster 9, the nitrogen production device 14, the hydrogen-nitrogen compressor 19 and the circulator 23. The power output end of the green energy module 1 is connected with a power storage module 17, and the power storage module 17 is used for supplying power to the electrolytic hydrogen production device 6, the hydrogen booster 9, the nitrogen production device 14, the hydrogen-nitrogen compressor 19 and the circulator 23.
In the invention, the green energy module 1 is used for energy complementation based on the green energy in different carrier power generation characteristics and providing electric energy for each module or equipment of the hydrogen production and storage and automatic control module 5, the nitrogen production and control module 13, the power storage module 17, the hydrogen nitrogen compression and control module 18 and the circulator 23 of the ammonia synthesis device 22. The green energy module 1 comprises a photovoltaic energy group 2 and a wind energy group 3, wherein the photovoltaic energy group 2 is used for converting solar radiation energy into electric energy, the wind energy group 3 is used for converting kinetic energy generated by air flow into electric energy, the installed capacities of the photovoltaic energy group 2 and the wind energy group 3 are matched according to a certain proportion according to local environment, so that the green energy module 1 continuously generates power, the generated energy of the photovoltaic energy group 2 in different time periods and the generated energy of the wind energy group 3 can be overlapped to finish peak-load-eliminating coupling for the first time, the capacity of electricity storage and hydrogen storage is reduced, and the fluctuation risk of high-frequency wide wave amplitude is reduced by half. In this embodiment, the power generation capacity curve of the coupled photovoltaic power generation set and the wind power energy set is shown in fig. 2, and the real-time power generation multifunctional table 4 in the green energy module 1 is installed at the power supply output end of the green energy module 1, and is used for monitoring the voltage, power and electric quantity of the real-time power supply of the green energy module 1, so that the power storage, the hydrogen storage start or the load adjustment of the ammonia synthesis device can be early warned for the downstream module.
A hydrogen storage device 10 is installed between the hydrogen regulating valve 8 and the hydrogen discharging regulating valve 12, the hydrogen regulating valve 8 is used for regulating the flow of hydrogen entering the hydrogen storage device 10 from the hydrogen output main pipeline, and the hydrogen discharging regulating valve 12 is used for regulating the flow of hydrogen entering the hydrogen output main pipeline from the hydrogen storage device 10. The total hydrogen flow meter 7 adjusts the opening degrees of the hydrogen regulating valve 8 and the hydrogen release regulating valve 12 with high accuracy according to the deviation between the measured value thereof and the measured value of the hydrogen flow meter 11. The hydrogen flow meter 11 preliminarily adjusts the opening degrees of the hydrogen regulating valve 8 and the hydrogen release regulating valve 12 according to the deviation between its measured value and its target value. Because the green energy module 1 has different generated energy in different time periods, the hydrogen production and hydrogen storage and the hydrogen production amount produced by the electrolysis hydrogen production device 6 in the automatic control module 5 also have fluctuation, so the hydrogen production and hydrogen storage and the automatic control module 5 are adopted to automatically adjust the hydrogen storage and the hydrogen supply. The hydrogen total flowmeter 7 and the hydrogen flowmeter 11 are sequentially arranged on a hydrogen conveying main pipeline and are respectively used for measuring hydrogen flow rates of different positions of a hydrogen output main pipeline, the hydrogen total flowmeter 7 is used as a main controller for cascade control in the hydrogen production and storage and automatic control module 5, and the hydrogen flowmeter 11 is used as a secondary controller for cascade control in the hydrogen production and storage and automatic control module 5; the hydrogen total flowmeter 7 sends real-time hydrogen flow data prepared by the hydrogen electrolysis device to a system control center, and the control center adjusts the opening of the hydrogen storage regulating valve 8 according to the real-time hydrogen flow; the hydrogen flowmeter 11 sends the real-time hydrogen flow to the system control center, and the control center adjusts the opening of the hydrogen release regulating valve 12 according to the real-time hydrogen flow, so that the hydrogen flow is distributed according to the real-time generated energy of the green energy module 1. When the method is specifically applied, early warning, automatic analysis and automatic adjustment according to a set program can be realized.
The hydrogen-nitrogen compression and control module 18 is arranged at the front end of the ammonia synthesis device 22, the hydrogen-nitrogen flowmeter 20 and the air inlet regulating valve 21 are controlled by a program, when the fluctuation of the hydrogen-nitrogen flowmeter 20 exceeds 10% in a short time, the flow signal is fed back to the air inlet regulating valve 21, and the air inlet regulating valve automatically opens the corresponding opening according to the valve opening of different load demands, so that the stable drop or rise of the operating pressure in the ammonia synthesis device 22 can be ensured, and the ammonia synthesis device can stably operate.
The specific embodiment of the flexible control green energy ammonia production method of the invention is shown in fig. 1, and the flexible control green energy ammonia production method of the embodiment comprises the following steps:
(1) The photovoltaic energy group 2 and the wind energy group 3 are taken as the green energy module 1 together, the installed capacities of the photovoltaic energy group 2 and the wind energy group 3 are matched in proportion (for example, the installed capacities can be distributed according to the environment of the place, the photovoltaic energy group and the wind energy group can be matched according to the proportion of 3:7), so that the green energy module 1 continuously generates electricity, the generated energy of the photovoltaic energy group and the generated energy of the wind energy group in different periods are combined, peak-load elimination coupling can be realized after the generated energy of the wind energy group is overlapped, the ammonia synthesis device can be stably operated at 30-80% in the whole day by utilizing the wind energy, the device load can be increased to 100% in the daytime of 8:00-17:00 by utilizing the periodicity of the photovoltaic energy, meanwhile, the redundant electric energy is converted into hydrogen for storage, and the load of the time from 17:00 to 8:00 in the morning in the next day is increased to 70-100% in the evening; the output circuit of the green energy module 1 is provided with a real-time power generation multifunctional ammeter 4, and the real-time power generation multifunctional ammeter 4 is used for measuring the voltage, the power and the electric quantity of the real-time power supply of the green energy module 1;
(2) The hydrogen production, hydrogen storage and flow regulation are carried out by utilizing the hydrogen production and automatic control module 5, the hydrogen production, hydrogen storage and automatic control module 5 comprises an electrolytic hydrogen production device 6, a hydrogen outlet of the electrolytic hydrogen production device 6 is connected with a hydrogen output main pipeline, a hydrogen output auxiliary pipeline is connected in parallel on the hydrogen output main pipeline, a hydrogen storage regulating valve 8, a hydrogen booster 9, a hydrogen storage device 10 and a hydrogen discharge regulating valve 12 are sequentially arranged on the hydrogen output auxiliary pipeline along the gas flow direction, and a hydrogen total flow meter 7 and a hydrogen flow meter 11 are respectively arranged on the hydrogen main pipeline before and after an inlet and an outlet of the hydrogen auxiliary pipeline; the hydrogen total flowmeter 7, the hydrogen storage regulating valve 8 and the hydrogen booster 9 are connected through signals; the hydrogen flowmeter 11 is connected with the hydrogen discharge regulating valve 12 through signals;
(3) The nitrogen preparation module 13 is utilized to carry out nitrogen preparation and nitrogen flow regulation, the nitrogen preparation module 13 comprises a nitrogen preparation device 14, a nitrogen pipeline is connected to a nitrogen outlet of the nitrogen preparation device 14, a nitrogen regulating valve 15 and a nitrogen flowmeter 16 are sequentially arranged on the nitrogen pipeline along the gas flow direction, and the nitrogen regulating valve 15 is connected with the nitrogen flowmeter 16 through signals;
(4) The hydrogen and the nitrogen are compressed by utilizing a hydrogen-nitrogen compression and control module 18, the hydrogen-nitrogen compression and control module 18 comprises a hydrogen-nitrogen compressor 19, an outlet of a hydrogen output main pipeline and an outlet of a nitrogen pipeline are connected in parallel and then are connected with an inlet of the hydrogen-nitrogen compressor 19, a mixed gas output pipeline is connected to an outlet of the hydrogen-nitrogen compressor 19, and a mixed gas flowmeter 20 is arranged on the mixed gas output pipeline;
(5) The synthesis ammonia device 22 is connected with a mixed gas output pipeline, the synthesis ammonia device 22 comprises an air inlet adjusting pipeline, an air inlet adjusting valve 23 is arranged on the air inlet adjusting pipeline, and the air inlet adjusting valve 23 is connected with the mixed gas flowmeter 20 through signals; the synthesis ammonia device 22 comprises an ammonia reactor, a waste heat recovery device, a heat exchanger and a cooling separator which are sequentially connected, wherein an exhaust port and a liquid ammonia discharge port are arranged on the cooling separator, a circulating pipeline is connected between the exhaust port and a refrigerant inlet of the heat exchanger, a circulating machine 23 is arranged on the circulating pipeline, an outlet of the mixed gas output pipeline is connected to the circulating pipeline between the heat exchanger and the circulating machine 23, an inlet end of an air inlet regulating pipeline is connected to the circulating pipeline between the heat exchanger and an outlet of a mixer output pipeline, and an outlet of the air inlet regulating pipeline is connected to the pipeline between the heat exchanger and the cooling separator; the refrigerant outlet of the heat exchanger is communicated with the inlet of the ammonia reactor through a pipeline, and the heat medium inlet and the heat medium outlet of the heat exchanger are respectively connected with the outlet of the waste heat recovery device and the inlet of the cooling separator;
(6) The green energy module 1 is connected with the hydrogen production, hydrogen storage and automatic control module 5, the nitrogen production module 13 and the hydrogen nitrogen compression and control module 18, so that the green energy module 1 supplies power to the hydrogen booster 9, the nitrogen production device 14 and the hydrogen nitrogen compressor 19; the green energy module 1 is connected with a power storage module 17, and when the real-time power generation multifunctional ammeter 4 detects that the power supply 1 of the green energy module is sufficient, the power storage module is used for storing redundant electric energy of the green energy module; when the real-time power generation multifunctional ammeter 4 detects that the green energy module 1 is insufficient in power supply, the power storage module 17 is utilized to supply power to the hydrogen booster 9, the nitrogen making device 14 and the hydrogen-nitrogen compressor 19; the circulating machine 23 is connected with the green energy module 1 and the electricity storage module 17, and the green energy module 1 and the electricity storage module 17 supply power to the circulating machine 23;
(7) Setting a hydrogen value for the demand of the ammonia synthesis device 22, comparing the hydrogen values by utilizing the maximum value of the water electrolysis hydrogen production, and when the hydrogen value of the water electrolysis hydrogen production is 100% higher than the demand of the ammonia synthesis device, automatically opening a hydrogen storage regulating valve 8, and simultaneously starting a hydrogen compressor 9 to store part of hydrogen; when the hydrogen production amount is smaller than 80% of the hydrogen demand amount of the ammonia synthesis device 22, the hydrogen compressor 9 and the hydrogen storage regulating valve 8 are automatically closed; the hydrogen total flowmeter 7 is used as a main controller for cascade control in the hydrogen production, hydrogen storage and automatic control module, the hydrogen total flowmeter 7 sends real-time hydrogen flow data prepared by the hydrogen electrolysis device 6 to a system control center, and the control center adjusts the opening of the hydrogen storage regulating valve 8 according to the real-time hydrogen flow; the hydrogen flowmeter 11 is used as a secondary controller for cascade control in the hydrogen production, hydrogen storage and automatic control module, the hydrogen flowmeter 11 sends real-time hydrogen flow to a system control center, and the control center adjusts the opening of the hydrogen release regulating valve 12 according to the real-time hydrogen flow;
(8) When the fluctuation of the hydrogen-nitrogen flowmeter 20 exceeds +/-20% in 1-10 minutes, the flow signal at the moment is fed back to the air inlet regulating valve 21, the opening of the air inlet regulating valve 21 is regulated to be automatically regulated to +/-5% - +/-10% according to the requirement, and the load fluctuation of the ammonia synthesis device is reduced.
The invention solves the problems that the operation of the green energy ammonia production process in the prior art in the state of high-frequency wide-amplitude fluctuation can cause load to both moving equipment and static equipment of the device, the service lives of the moving equipment and the static equipment can be greatly reduced by adjusting the load frequently in transition, the risk of stopping the device possibly exists due to untimely manual intervention, and the high-frequency wide-amplitude fluctuation caused by factors such as illumination, wind fields and the like can be effectively solved by utilizing the green energy ammonia production system. The invention adopts the combination of wind power and photovoltaic, and carries out primary peak elimination and valley elimination on the green energy, so that the risk of high-frequency wide-amplitude fluctuation can be reduced by half; then, by utilizing cascade control of the DCS, hydrogen storage and hydrogen release are carried out in the green energy wave peak stage and the trough stage, so that the influence caused by unstable power supply of the green energy is reduced again; if extreme working conditions occur, the ammonia synthesis device cannot be ensured to run in a stable state by adopting the two regulation and control means, a loop valve of the ammonia synthesis device is automatically opened in proportion according to a feedback value by adopting DCS single loop control, and the influence of high frequency and large fluctuation of green energy power generation on hydrogen production load caused by water electrolysis hydrogen production is ensured, so that the unstable running of the synthesis device is indirectly caused.
The invention overcomes the defect that the green energy ammonia production device with high frequency and wide amplitude in the prior art brings great influence to production, can carry out peak regulation and valley filling on the high frequency and wide amplitude of the green energy, carries out a series of control and adjustment by combining set parameters through secondary coupling of hydrogen storage and electricity storage, ensures that the load of the green energy ammonia production device is reduced or increased within a specified time, realizes flexible load adjustment, and controls the device to operate within a specified index. After the flexible control green energy ammonia production system is used, the linear relation of high-frequency wide-amplitude wave which is influenced by the green energy on the ammonia synthesis device can be adjusted to be the linear relation of low-frequency microwave amplitude wave, and stable operation of the ammonia synthesis device can be ensured.
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments. The scope of the invention as defined by the appended claims encompasses all equivalent substitutions and modifications.
Claims (10)
1. A flexible control's green energy system ammonia system, its characterized in that: the device comprises a green energy module, a hydrogen production, hydrogen storage and automatic control module, a nitrogen production module, a hydrogen-nitrogen compression and control module and an ammonia synthesis device, wherein the green energy module comprises a photovoltaic energy group and a wind energy group which are connected in parallel;
the hydrogen production, hydrogen storage and automatic control module comprises an electrolytic hydrogen production device, a hydrogen outlet of the electrolytic hydrogen production device is connected with a hydrogen output main pipeline, a hydrogen output auxiliary pipeline is connected in parallel on the hydrogen output main pipeline, a hydrogen storage regulating valve, a hydrogen booster, a hydrogen storage device and a hydrogen discharge regulating valve are sequentially arranged on the hydrogen output auxiliary pipeline along the gas flow direction, and a hydrogen total flowmeter and a hydrogen flowmeter are respectively arranged on the hydrogen main pipeline before and after an inlet and an outlet of the hydrogen auxiliary pipeline; the hydrogen total flowmeter, the hydrogen storage regulating valve and the hydrogen booster are connected through signals; the hydrogen flowmeter is connected with the hydrogen discharge regulating valve through signals;
the nitrogen production module comprises a nitrogen production device, a nitrogen pipeline is connected to a nitrogen outlet of the nitrogen production device, a nitrogen regulating valve and a nitrogen flowmeter are sequentially arranged on the nitrogen pipeline along the gas flow direction, and the nitrogen regulating valve is connected with the nitrogen flowmeter through signals;
the hydrogen-nitrogen compression and control module comprises a hydrogen-nitrogen compressor, an outlet of a hydrogen output main pipeline and an outlet of a nitrogen pipeline are connected in parallel and then connected with an inlet of the hydrogen-nitrogen compressor, a mixed gas output pipeline is connected to the outlet of the hydrogen-nitrogen compressor, and a mixed gas flowmeter is arranged on the mixed gas output pipeline;
the synthesis ammonia device is connected with a mixed gas output pipeline and comprises an air inlet adjusting pipeline, an air inlet adjusting valve is arranged on the air inlet adjusting pipeline, and the air inlet adjusting valve is connected with the mixed gas flowmeter through signals;
the green energy module is used for supplying power to the electrolytic hydrogen production device, the hydrogen booster, the nitrogen production device and the hydrogen-nitrogen compressor.
2. The flexibly controlled green energy ammonia production system of claim 1, wherein: and the power output end of the green energy module is connected with a power storage module, and the power storage module is used for supplying power to the electrolytic hydrogen production device, the hydrogen booster, the nitrogen production device and the hydrogen-nitrogen compressor.
3. The flexibly controlled green energy ammonia production system of claim 1, wherein: and the output circuit after the photovoltaic energy group and the wind energy group are connected in parallel is provided with a real-time power generation multifunctional ammeter.
4. The flexibly controlled green energy ammonia production system of claim 1, wherein: the synthesis ammonia device comprises an ammonia reactor, a waste heat recovery device, a heat exchanger and a cooling separator which are sequentially connected, wherein an exhaust port and a liquid ammonia discharge port are arranged on the cooling separator, a circulating pipeline is connected between the exhaust port and a refrigerant inlet of the heat exchanger, a circulating machine is arranged on the circulating pipeline, an outlet of a mixed gas output pipeline is connected to the circulating pipeline between the heat exchanger and the circulating machine, an inlet end of an air inlet regulating pipeline is connected to the circulating pipeline between the heat exchanger and an outlet of the mixed gas output pipeline, and an outlet of the air inlet regulating pipeline is connected to the pipeline between the heat exchanger and the cooling separator; the refrigerant outlet of the heat exchanger is communicated with the inlet of the ammonia reactor through a pipeline, and the heat medium inlet and the heat medium outlet of the heat exchanger are respectively connected with the outlet of the waste heat recovery device and the inlet of the cooling separator.
5. The flexible control green energy ammonia production method is characterized by comprising the following steps of: (1) The photovoltaic energy group and the wind energy group are taken as green energy modules together, and the installed capacities of the photovoltaic energy group and the wind energy group are matched in proportion, so that the green energy modules continuously generate electricity, and the generated energy of the photovoltaic energy group and the generated energy of the wind energy group in different time periods are combined; (2) The hydrogen production, hydrogen storage and flow regulation are carried out by utilizing a hydrogen production and self-control module, the hydrogen production and hydrogen storage and self-control module comprises an electrolytic hydrogen production device, a hydrogen outlet of the electrolytic hydrogen production device is connected with a hydrogen output main pipeline, a hydrogen output auxiliary pipeline is connected in parallel on the hydrogen output main pipeline, a hydrogen storage regulating valve, a hydrogen booster, a hydrogen storage device and a hydrogen discharge regulating valve are sequentially arranged on the hydrogen output auxiliary pipeline along the gas flow direction, and a hydrogen total flowmeter and a hydrogen flowmeter are respectively arranged on the hydrogen main pipeline before and after an inlet and an outlet of the hydrogen auxiliary pipeline; the hydrogen total flowmeter, the hydrogen storage regulating valve and the hydrogen booster are connected through signals; the hydrogen flowmeter is connected with the hydrogen discharge regulating valve through signals; (3) The nitrogen production module comprises a nitrogen production device, a nitrogen pipeline is connected to a nitrogen outlet of the nitrogen production device, a nitrogen regulating valve and a nitrogen flowmeter are sequentially arranged on the nitrogen pipeline along the gas flow direction, and the nitrogen regulating valve is connected with the nitrogen flowmeter through signals; (4) The hydrogen and nitrogen are compressed by utilizing a hydrogen-nitrogen compression and control module, the hydrogen-nitrogen compression and control module comprises a hydrogen-nitrogen compressor, an outlet of a hydrogen output main pipeline and an outlet of a nitrogen pipeline are connected in parallel and then are connected with an inlet of the hydrogen-nitrogen compressor, a mixed gas output pipeline is connected to an outlet of the hydrogen-nitrogen compressor, and a mixed gas flowmeter is arranged on the mixed gas output pipeline; (5) Connecting a synthesis ammonia device with a mixed gas output pipeline, wherein the synthesis ammonia device comprises an air inlet adjusting pipeline, an air inlet adjusting valve is arranged on the air inlet adjusting pipeline, and the air inlet adjusting valve is connected with the mixed gas flowmeter through signals; (6) The green energy module is connected with the hydrogen production, hydrogen storage and automatic control module, the nitrogen production module and the hydrogen-nitrogen compression and control module, so that the green energy module supplies power to the hydrogen booster, the nitrogen production device and the hydrogen-nitrogen compressor; (7) Setting a hydrogen value for the demand of the ammonia synthesis device, comparing the hydrogen values by utilizing the maximum hydrogen value of the water electrolysis, and when the hydrogen value of the water electrolysis is 100% higher than the demand of the ammonia synthesis device, automatically opening a hydrogen storage regulating valve, and simultaneously starting a hydrogen compressor to store part of hydrogen; when the hydrogen production amount is smaller than 80% of the hydrogen demand amount of the ammonia synthesizing device, the hydrogen compressor and the hydrogen storage regulating valve are automatically closed; the hydrogen total flowmeter is used as a main controller for cascade control in the hydrogen production and storage and automatic control module, the hydrogen total flowmeter sends real-time hydrogen flow data prepared by the hydrogen electrolysis device to a system control center, and the control center adjusts the opening of the hydrogen storage regulating valve according to the real-time hydrogen flow; and the hydrogen flowmeter is used as a secondary controller for cascade control in the hydrogen production and storage and automatic control module, the hydrogen flowmeter sends the real-time hydrogen flow to a system control center, and the control center adjusts the opening of the hydrogen release regulating valve according to the real-time hydrogen flow.
6. The flexible controlled green energy ammonia process of claim 5, wherein: it also comprises the step (8): when the fluctuation of the hydrogen-nitrogen flowmeter exceeds +/-20% in 1-10 minutes, the flow signal at the moment is fed back to the air inlet regulating valve, the opening of the air inlet regulating valve is regulated to be automatically regulated to +/-5% - +/-10% according to the requirement, and the load fluctuation of the ammonia synthesis device is reduced.
7. The flexible controlled green energy ammonia process of claim 5, wherein: the power supply system comprises a green energy module, a real-time power generation multifunctional ammeter, a power supply module and a power supply module, wherein the green energy module is connected with the power supply module, and when the real-time power generation multifunctional ammeter detects that the power supply of the green energy module is sufficient, the power supply module is used for storing redundant electric energy of the green energy module; when the real-time power generation multifunctional ammeter detects that the green energy module is insufficient in power supply, the power storage module is utilized to supply power to the hydrogen booster, the nitrogen making device and the hydrogen-nitrogen compressor.
8. The flexible controlled green energy ammonia process of claim 5, wherein: the output circuit of the green energy module is provided with a real-time power generation multifunctional ammeter which is used for measuring the voltage, the power and the electric quantity of the green energy module which are supplied with power in real time.
9. The flexible controlled green energy ammonia process of claim 5, wherein: the synthesis ammonia device comprises an ammonia reactor, a waste heat recovery device, a heat exchanger and a cooling separator which are sequentially connected, wherein an exhaust port and a liquid ammonia discharge port are arranged on the cooling separator, a circulating pipeline is connected between the exhaust port and a refrigerant inlet of the heat exchanger, a circulating machine is arranged on the circulating pipeline, an outlet of a mixed gas output pipeline is connected to the circulating pipeline between the heat exchanger and the circulating machine, an inlet end of an air inlet regulating pipeline is connected to the circulating pipeline between the heat exchanger and an outlet of a mixer output pipeline, and an outlet of the air inlet regulating pipeline is connected to the pipeline between the heat exchanger and the cooling separator; the refrigerant outlet of the heat exchanger is communicated with the inlet of the ammonia reactor through a pipeline, and the heat medium inlet and the heat medium outlet of the heat exchanger are respectively connected with the outlet of the waste heat recovery device and the inlet of the cooling separator.
10. The flexible controlled green energy ammonia process of claim 6, wherein: the circulating machine is connected with a green energy module, and the green energy module supplies power to the circulating machine.
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