CN114877248A - Natural gas hydrogen-loading control system and control method - Google Patents
Natural gas hydrogen-loading control system and control method Download PDFInfo
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- CN114877248A CN114877248A CN202210515271.5A CN202210515271A CN114877248A CN 114877248 A CN114877248 A CN 114877248A CN 202210515271 A CN202210515271 A CN 202210515271A CN 114877248 A CN114877248 A CN 114877248A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 260
- 239000003345 natural gas Substances 0.000 title claims abstract description 130
- 238000011068 loading method Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000001257 hydrogen Substances 0.000 claims abstract description 114
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 114
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000000872 buffer Substances 0.000 claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- 238000003860 storage Methods 0.000 claims abstract description 32
- 239000012160 loading buffer Substances 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000010248 power generation Methods 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 10
- 239000010409 thin film Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 10
- 238000005868 electrolysis reaction Methods 0.000 description 8
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0157—Compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0447—Composition; Humidity
- F17C2250/0452—Concentration of a product
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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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application provides a natural gas hydrogen-loading control system and a control method, which comprises an electrolytic hydrogen production system and a natural gas hydrogen-loading buffer tank which are connected through a first pipeline, the electrolytic hydrogen production system is used for introducing hydrogen into the natural gas hydrogen-blending buffer tank, the natural gas hydrogen-blending buffer tank is also externally connected with a natural gas pipeline for introducing natural gas, by arranging the natural gas hydrogen-blending buffer tank, the natural gas pipeline is connected outside the natural gas hydrogen-blending buffer tank and is filled with natural gas, hydrogen generated by the electrolytic hydrogen production system is filled into the natural gas hydrogen-blending buffer tank for mixing, the mixed gas is supplied to a terminal user for use through the natural gas pipeline, renewable energy sources are consumed to the maximum extent for power generation, and the use amount and the hydrogen preparation amount of downstream users are combined, and the high-pressure storage tank is adopted to store hydrogen for adjustment, so that the matching between power generation and downstream terminal users is effectively solved, and the safe and stable gas use of the terminal users and the power generation allocation of renewable energy sources are ensured.
Description
Technical Field
The application relates to the technical field of hydrogen production, in particular to a natural gas hydrogen-doping control system and a control method.
Background
The hydrogen is prepared by utilizing green electric power such as wind, light and the like, is a mainstream green hydrogen preparation mode at present, effectively solves the problem of electricity use of renewable energy wind and photoelectric power which cannot be stored for a long time, and can be stored or consumed by preparing the hydrogen by utilizing the green electric power. However, the main transportation mode of hydrogen consumption is to transport by using a hydrogen long-tube trailer, and the transportation efficiency of the mode is low, and the transportation cost is high.
Disclosure of Invention
The present application is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, the purpose of the application is to provide a natural gas hydrogen-doping control system, through setting a natural gas hydrogen-doping buffer tank, the natural gas hydrogen-doping buffer tank is externally connected with a natural gas pipeline and is filled with natural gas, hydrogen generated by an electrolytic hydrogen production system is filled into the natural gas hydrogen-doping buffer tank and is mixed, and mixed gas is supplied to a terminal user through the natural gas pipeline for use.
In order to achieve the purpose, the natural gas hydrogen-loading control system comprises an electrolytic hydrogen production system and a natural gas hydrogen-loading buffer tank which are connected through a first pipeline, the electrolytic hydrogen production system is used for introducing hydrogen into the natural gas hydrogen-loading buffer tank, the natural gas hydrogen-loading buffer tank is also externally connected with a natural gas pipeline for introducing natural gas, the natural gas and the hydrogen gas are mixed in the natural gas hydrogen-loading buffer tank, the gas outlet of the natural gas hydrogen-loading buffer tank is communicated with an end user to supply mixed gas, a hydrogen buffer tank is arranged on a first pipeline between the electrolytic hydrogen production system and the natural gas hydrogen-mixing buffer tank, and a second pipeline is also connected in parallel between the hydrogen buffer tank and the natural gas hydrogen-mixing buffer tank, and a high-pressure storage tank is arranged on the second pipeline and is used for storing the produced gas of the electrolytic hydrogen production system.
Further, a diaphragm compressor is further arranged on the second pipeline.
Further, the hydrogen storage device also comprises a first pressure transmitter arranged on the hydrogen buffer tank.
And the analyzer is arranged on the natural gas hydrogen-loading buffer tank and is used for monitoring the concentration of the natural gas in the natural gas hydrogen-loading buffer tank.
Further, the system also comprises a renewable energy power generation system, and the renewable energy power generation system is electrically connected with the electrolytic hydrogen production system.
Furthermore, a first pipeline between the hydrogen buffer tank and the natural gas hydrogen-loading buffer tank is provided with a first pneumatic valve, a first pressure reducing valve, a first pneumatic film regulating valve and a first mass flowmeter.
Further, a second pneumatic valve, a second pressure reducing valve, a second pneumatic film regulating valve and a second mass flowmeter are arranged on a second pipeline between the high-pressure storage tank and the natural gas hydrogen-loading buffer tank.
Furthermore, a third pneumatic film regulating valve and a third mass flowmeter are arranged on the natural gas pipeline.
Further, the high-pressure storage tank comprises a second pressure transmitter arranged on the high-pressure storage tank.
A control method of a natural gas hydrogen-loading control system is applied to the natural gas hydrogen-loading control system and comprises the following steps,
monitoring the pressure of a hydrogen buffer tank according to a first pressure transmitter, and starting a diaphragm compressor to charge hydrogen into a high-pressure storage tank when the pressure of the hydrogen buffer tank is higher than a preset pressure value; when the pressure of the hydrogen buffer tank is lower than a preset pressure value, starting a high-pressure storage tank and a second pneumatic valve to replenish hydrogen into the natural gas hydrogen-loading buffer tank; and monitoring the natural gas concentration in the natural gas hydrogen-loading buffer tank according to an analyzer, and adjusting the opening degrees of the first pneumatic thin film adjusting valve, the second pneumatic thin film adjusting valve and the third pneumatic thin film adjusting valve when the natural gas concentration in the natural gas hydrogen-loading buffer tank deviates from a preset concentration value.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a natural gas loading control system according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a schematic structural diagram of a natural gas loading control system according to an embodiment of the present application.
Referring to fig. 1, a natural gas hydrogen-blending control system comprises an electrolysis hydrogen production system 2 and a natural gas hydrogen-blending buffer tank 17 which are connected through a first pipeline, wherein the electrolysis hydrogen production system 2 is used for introducing hydrogen into the natural gas hydrogen-blending buffer tank 17, the natural gas hydrogen-blending buffer tank 17 is further externally connected with a natural gas pipeline for introducing natural gas, the natural gas and the hydrogen are mixed in the natural gas hydrogen-blending buffer tank 17, a gas outlet of the natural gas hydrogen-blending buffer tank 17 is communicated with a terminal user to supply mixed gas, a hydrogen buffer tank 3 is arranged on the first pipeline between the electrolysis hydrogen production system 2 and the natural gas hydrogen-blending buffer tank 17, when the hydrogen production amount of the electrolysis hydrogen production system 2 is large, the hydrogen enters the hydrogen buffer tank 3 for storage and buffering to avoid impact on the first pipeline, when the hydrogen production amount of the electrolysis hydrogen production system is small, the hydrogen buffer tank 3 supplements the hydrogen in the first pipeline, the hydrogen of the first pipeline is stably output, and the uniform mixing of the hydrogen and the natural gas in the natural gas hydrogen-blending buffer tank is favorably improved. A second pipeline is further connected in parallel between the hydrogen buffer tank 3 and the natural gas hydrogen-loading buffer tank 17, a high-pressure storage tank 14 is arranged on the second pipeline, and the high-pressure storage tank 14 is used for storing the produced gas of the electrolytic hydrogen production system 2.
In this embodiment, carry out the mix transport end user through carrying out natural gas and hydrogen and use, improve the efficiency of consuming of hydrogen, utilize current natural gas transportation pipeline, need not any transformation, the cost is lower. The system is also provided with a second pipeline, the high-pressure storage tank is used for storing hydrogen by combining the use amount of downstream users and the hydrogen preparation amount through the high-pressure storage tank on the second pipeline, and when the upstream generated energy is large and the downstream demand is small, the produced hydrogen is stored; when the downstream demand is increased and the upstream hydrogen production cannot meet the output demand, the high-pressure storage tank is used for gas supplement, so that the matching between the upstream power generation and the downstream terminal user is effectively solved, and the gas use safety and stability of the terminal user and the power generation allocation function of renewable energy resources are ensured.
And a diaphragm compressor 13 is also arranged on the second pipeline. The diaphragm compressor is used for supercharging, and can compress the hydrogen output by the electrolytic hydrogen production system and quickly charge the hydrogen into the high-pressure storage tank, so that the device is convenient and quick.
The natural gas hydrogen loading control system also comprises a first pressure transmitter 4 arranged on the hydrogen buffer tank 3. The first pressure transmitter 4 monitors the pressure of the hydrogen in the hydrogen buffer tank 3 in real time, and then monitors the hydrogen production output of the electrolytic hydrogen production system.
The natural gas hydrogen-loading control system further comprises an analyzer 16 arranged on the natural gas hydrogen-loading buffer tank 17, wherein the analyzer 16 is used for monitoring the concentration of the natural gas in the natural gas hydrogen-loading buffer tank 17, and can be adjusted in time when the concentration of the natural gas deviates. The analyzer may be a natural gas concentration detector.
The natural gas hydrogen loading control system further comprises a renewable energy power generation system 1, and the renewable energy power generation system 1 is electrically connected with the electrolysis hydrogen production system 2. In this embodiment, the renewable energy power generation system 1 includes at least one of green energy sources such as a wind power generation system, a solar power generation system, and a hydro-energy power generation system, so that sustainable utilization of energy sources is realized, and the environment is protected without pollution.
And a first pneumatic valve 5, a first pressure reducing valve 6, a first pneumatic film regulating valve 7 and a first mass flowmeter 8 are arranged on a first pipeline between the hydrogen buffer tank 3 and the natural gas hydrogen-loading buffer tank 17. And a second pneumatic valve 12, a second pressure reducing valve 11, a second pneumatic film regulating valve 10 and a second mass flow meter 9 are arranged on a second pipeline between the high-pressure storage tank 14 and the natural gas hydrogen-loading buffer tank 17.
In this embodiment, the pneumatic valve is used for carrying out the on-off control of pipeline, and the relief pressure valve carries out the decompression according to the pressure value that sets up in advance, makes it satisfy and fills the pressure requirement, and pneumatic membrane governing valve is used for carrying out the regulation of gas flow, makes it satisfy preset natural gas concentration, and mass flow meter is used for carrying out the monitoring of gas flow.
And a third pneumatic membrane regulating valve 18 and a third mass flow meter 19 are arranged on the natural gas pipeline. In this embodiment, the third pneumatic membrane regulating valve 18 is used to regulate the flow of the natural gas so that the ratio of the flow to the introduced hydrogen concentration meets a preset value, and the third mass flow meter is used to monitor and ensure that the flow of the natural gas meets the requirement.
A natural gas loading control system further includes a second pressure transmitter 15 provided on the high-pressure storage tank 14. The second pressure transmitter 15 is used for monitoring the gas pressure in the high-pressure storage tank, and the situation that the filling pressure of the high-pressure storage tank 14 is too high and potential safety hazards exist is avoided.
A control method of a natural gas hydrogen-loading control system is applied to the natural gas hydrogen-loading control system and comprises the following steps,
monitoring the pressure of the hydrogen buffer tank 3 according to the first pressure transmitter 4, and starting the diaphragm compressor 13 to charge hydrogen into the high-pressure storage tank 14 when the pressure of the hydrogen buffer tank 3 is higher than a preset pressure value; when the pressure of the hydrogen buffer tank 3 is lower than a preset pressure value, the high-pressure storage tank 14 and the second pneumatic valve 13 are started to replenish hydrogen into the natural gas hydrogen-loading buffer tank 17; the concentration of the natural gas in the natural gas loading buffer tank 17 is monitored according to the analyzer 16, and the opening degrees of the first pneumatic membrane regulating valve 7, the second pneumatic membrane pneumatic regulating valve 10 and the third pneumatic membrane regulating valve 18 are regulated when the concentration of the natural gas in the natural gas loading buffer tank 17 deviates from a preset concentration value.
In this embodiment, the preset pressure value may be set according to the hydrogen production power in a normal state of the electrolytic hydrogen production system, and the preset concentration value may be set according to the feedback effect of the user, so that the electrolytic hydrogen production system has a higher combustion efficiency.
The system is controlled by a PLC (programmable logic controller) completely, and can realize remote and automatic control. Renewable energy power generation system 1 sends "green electricity" back, supply power for electrolysis hydrogen production system 2, electrolysis hydrogen production system 2 is according to renewable energy power generation system 1's generated energy automatically regulated hydrogen manufacturing load, output hydrogen passes through hydrogen buffer tank 3, hydrogen buffer tank 3 is equipped with first pressure transmitter 4 and monitors hydrogen buffer tank pressure, first pneumatic valve 5 opens, hydrogen passes through first pneumatic valve 5, get into the first relief pressure valve 6 according to low reaches user set pressure, get into natural gas blending buffer tank 17 through first pneumatic film control valve 7 and first mass flowmeter 8, get into low reaches user after mixing with natural gas blending. Monitoring a first pressure transmitter 4 of a tank body of a hydrogen buffer tank 3 from time to time, when the monitored pressure is lower than a set pressure value, the system defaults that the output of a renewable energy power generation system and an electrolytic hydrogen production system can not meet the use requirement of a downstream user, a high-pressure storage tank 14 for storage and standby is started for use, a second pneumatic valve 12 is automatically opened, enters a second pressure reducing valve 11 with the pressure set according to the downstream user, is regulated by a second pneumatic film regulating valve 10 to flow, and enters a natural gas hydrogen-blending buffer tank 17 through a second mass flowmeter 9; when the pressure of the hydrogen buffer tank 3 is higher than a set pressure value, the system defaults that the output of the renewable energy power generation system and the output of the electrolytic hydrogen production system 2 are higher than the use requirements of downstream users, the hydrogen diaphragm compressor 13 is automatically started at the moment to supplement and store hydrogen for the high-pressure storage tank 14, when the pressure value of the second pressure transmitter 15 reaches the upper limit of the pressure of the high-pressure storage tank, the hydrogen diaphragm compressor 13 is closed, and the high-pressure storage tank 14 is reserved as energy for standby. The natural gas passes through a third pneumatic membrane regulating valve 18 to regulate the flow rate, enters a third mass flowmeter 19 and then enters a natural gas hydrogen-mixing buffer tank 17. The natural gas blending buffer tank 17 is internally provided with a natural gas analyzer which monitors the concentration ratio of natural gas and hydrogen in the storage tank from time to time, and when the concentration indexes of the hydrogen and the natural gas in the natural gas blending buffer tank 17 deviate, the system controls the first pneumatic film regulating valve 7, the second pneumatic film regulating valve 10 and the third pneumatic film regulating valve 18 to perform system PID regulation, so that the flow of output gas is increased or reduced, and the effect of regulating the concentration ratio is achieved. Renewable energy volatility has been overcome in this application, avoided influencing user's safety in utilization because of renewable energy hydrogen's volatility in the natural gas field of mixing hydrogen, and simultaneously, according to the volatility of electric power, hydrogen has been stored in the time that electric power is sufficient, the waste of the energy has been reduced, in the lower time quantum of generated energy, use reserve hydrogen supply, user's gas supply has been ensured, the control system method of natural gas mixing hydrogen still provided simultaneously, the effectual regulation safety supply who guarantees hydrogen and natural gas proportion.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A natural gas hydrogen-loading control system is characterized by comprising an electrolytic hydrogen production system and a natural gas hydrogen-loading buffer tank which are connected through a first pipeline, the electrolytic hydrogen production system is used for introducing hydrogen into the natural gas hydrogen-blending buffer tank, the natural gas hydrogen-blending buffer tank is also externally connected with a natural gas pipeline for introducing natural gas, the natural gas and the hydrogen gas are mixed in the natural gas hydrogen-loading buffer tank, the gas outlet of the natural gas hydrogen-loading buffer tank is communicated with an end user to supply mixed gas, a hydrogen buffer tank is arranged on a first pipeline between the electrolytic hydrogen production system and the natural gas hydrogen-mixing buffer tank, and a second pipeline is also connected in parallel between the hydrogen buffer tank and the natural gas hydrogen-mixing buffer tank, and a high-pressure storage tank is arranged on the second pipeline and is used for storing the produced gas of the electrolytic hydrogen production system.
2. The natural gas loading control system as claimed in claim 1, wherein a diaphragm compressor is further provided on the second pipeline.
3. The natural gas loading control system as claimed in claim 1, further comprising a first pressure transmitter disposed on the hydrogen buffer tank.
4. The natural gas loading control system as claimed in claim 1, further comprising an analyzer disposed on the natural gas loading buffer tank, the analyzer being configured to monitor a concentration of natural gas in the natural gas loading buffer tank.
5. The natural gas loading control system of claim 1, further comprising a renewable energy power generation system, the renewable energy power generation system being electrically connected to the electrolytic hydrogen production system.
6. The natural gas loading control system as claimed in claim 1, wherein a first pneumatic valve, a first pressure reducing valve, a first pneumatic membrane regulating valve and a first mass flow meter are provided on a first pipeline between the hydrogen buffer tank and the natural gas loading buffer tank.
7. The natural gas loading control system as claimed in claim 1, wherein a second pneumatic valve, a second pressure reducing valve, a second pneumatic membrane regulating valve and a second mass flow meter are provided on a second pipeline between the high pressure storage tank and the natural gas loading buffer tank.
8. The natural gas loading control system as claimed in claim 1, wherein a third pneumatic membrane regulating valve and a third mass flow meter are disposed on the natural gas pipeline.
9. The natural gas loading control system as claimed in claim 1, further comprising a second pressure transmitter disposed on the high pressure storage tank.
10. A control method of a natural gas loading control system applied to the natural gas loading control system according to any one of claims 1 to 9, characterized by comprising the steps of,
monitoring the pressure of a hydrogen buffer tank according to a first pressure transmitter, and starting a diaphragm compressor to charge hydrogen into a high-pressure storage tank when the pressure of the hydrogen buffer tank is higher than a preset pressure value; when the pressure of the hydrogen buffer tank is lower than a preset pressure value, starting a high-pressure storage tank and a second pneumatic valve to replenish hydrogen into the natural gas hydrogen-loading buffer tank;
and monitoring the natural gas concentration in the natural gas hydrogen-loading tank according to an analyzer, and adjusting the opening degrees of the first pneumatic thin film adjusting valve, the second pneumatic thin film adjusting valve and the third pneumatic thin film adjusting valve when the natural gas concentration in the natural gas hydrogen-loading buffer tank deviates from a preset concentration value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116464917A (en) * | 2023-04-26 | 2023-07-21 | 山东齐鲁氢能研究院有限公司 | Integrated hydrogen-adding device based on natural gas pipe network system |
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