CN113028286A - Natural gas hydrogen-mixing system - Google Patents
Natural gas hydrogen-mixing system Download PDFInfo
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- CN113028286A CN113028286A CN202011567497.7A CN202011567497A CN113028286A CN 113028286 A CN113028286 A CN 113028286A CN 202011567497 A CN202011567497 A CN 202011567497A CN 113028286 A CN113028286 A CN 113028286A
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- hydrogen
- natural gas
- flowmeter
- pipeline
- flow controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
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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)
- Hydrogen, Water And Hydrids (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The invention relates to a natural gas hydrogen-loading system, and belongs to the technical field of energy. The system comprises a natural gas pipeline, a natural gas flowmeter, a buffer tank, a hydrogen storage tank, a hydrogen flow controller, a hydrogen flowmeter and a control module, wherein the natural gas flowmeter and the hydrogen flowmeter are used for monitoring the natural gas flow in the natural gas pipeline and the hydrogen flow in the hydrogen pipeline in real time, and the control module controls the opening degree of an internal valve of the hydrogen flow controller according to the monitoring results of the natural gas flowmeter and the hydrogen flowmeter and the target proportion of the hydrogen mixing ratio, so that the hydrogen flow in the hydrogen pipeline is adjusted, and the natural gas hydrogen mixing ratio is ensured to be within the target range. The system disclosed by the invention is simple in structure, high in safety, capable of realizing effective mixing of natural gas and hydrogen, small in fluctuation range of the hydrogen doping ratio of the natural gas and good in application prospect.
Description
Technical Field
The invention relates to a natural gas hydrogen-loading system, and belongs to the technical field of energy.
Background
The hydrogen production by renewable energy is an effective way for solving the problem of green power consumption of wind, light and the like in China, but due to the geographical mismatching of production and consumption loads, the problem of large-scale transportation of hydrogen exists, and natural gas hydrogen mixing is one of feasible ways for solving large-scale long-distance transportation of hydrogen. The natural gas hydrogen-loading technology is an energy technology which mixes hydrogen into natural gas according to a certain volume ratio to form hydrogen-loaded natural gas (HCNG), conveys the hydrogen-loaded natural gas through the existing natural gas pipeline and can directly replace the natural gas for use. The breakthrough and the application of the technology are beneficial to the smooth implementation of the development strategy of green energy in China, and the healthy development of the clean energy industry in China is guaranteed and promoted.
In addition, the natural gas import quantity of China is improved year by year, and the external dependence degree reaches 45 percent, which is a great threat to the energy safety of China. The renewable energy is used for preparing green hydrogen energy, and natural gas is used by adding hydrogen, which is an effective supplement to natural gas gaps in China. According to statistics, hydrogen is produced only by utilizing the power of abandoned wind, abandoned light and abandoned water in the three north and the southwest areas of China, and the annual hydrogen production amount can reach more than 100 billion cubic meters and is about 10 percent of the natural gas import amount of China. Therefore, breakthrough and application of the natural gas hydrogen-doping technology have important strategic significance for guaranteeing the energy safety of China.
The key of popularization and application of natural gas hydrogen loading is stable control of hydrogen loading ratio. From the whole process of natural gas hydrogen loading, a user side, particularly an HCNG gas device of an industrial user, generally sets parameters according to a certain hydrogen loading ratio, and the actually supplied HCNG hydrogen loading ratio can fluctuate within a certain range. If the volume ratio of HCNG hydrogen supplied upstream is out of the range, there may be a safety risk or a reduction in energy use efficiency may result, and therefore it is necessary to keep the proportion of HCNG hydrogen substantially constant. The natural gas flow of the natural gas pipeline generally fluctuates within a certain range, and if the hydrogen doping amount cannot be adjusted in time according to the natural gas flow, the hydrogen doping ratio may exceed the control range, and safety risks are brought to the whole gas transmission system and downstream users.
Disclosure of Invention
The invention provides a natural gas hydrogen-blending system aiming at the problem of fluctuation of the flow of natural gas in the conveying process, which can regulate and control the flow of hydrogen according to the flow of the natural gas, ensure that the hydrogen-blending ratio is in a target proportion range and avoid bringing safety risks to the whole gas conveying system and downstream users.
The purpose of the invention is realized by the following technical scheme.
A natural gas hydrogen-loading system comprises a natural gas pipeline, a natural gas flowmeter, a buffer tank, a hydrogen storage tank, a hydrogen flow controller, a hydrogen flowmeter and a control module;
the natural gas flowmeter is arranged on the natural gas pipeline and is used for monitoring the flow of natural gas in the natural gas pipeline in real time; the front end of the hydrogen pipeline is connected with a hydrogen storage tank, and the hydrogen storage tank is used for storing hydrogen and providing a stable hydrogen source for the system; the tail end of the hydrogen pipeline and the tail end of the natural gas pipeline are respectively connected with a buffer tank, and the buffer tank is used as a mixing place of hydrogen and natural gas, so that the gas mixing uniformity can be improved; the hydrogen flow controller and the hydrogen flowmeter are arranged on the hydrogen pipeline, the hydrogen flow controller is positioned between the hydrogen flowmeter and the hydrogen storage tank, and the hydrogen flowmeter monitors the adjusted hydrogen flow, so that the hydrogen flow controller not only has the function of monitoring the hydrogen flow in the hydrogen pipeline in real time, but also has the function of checking and regulating the effect; the control module is used for collecting and processing monitoring results of the natural gas flowmeter and the hydrogen flowmeter, and is used for controlling the opening degree of a valve inside the hydrogen flow controller to adjust the flow of hydrogen in a hydrogen pipeline, so that the hydrogen mixing ratio is in a target proportion range.
Further, mass flow meters are selected for the natural gas flow meter and the hydrogen flow meter, correspondingly, the mass flow controllers are selected for the hydrogen flow controllers, the monitoring precision is high, and the result is more accurate.
Further, when the medium-high pressure natural gas is subjected to hydrogen doping, the system further comprises a hydrogen compressor, wherein the hydrogen compressor is arranged on the hydrogen pipeline and used for increasing the hydrogen pressure output by the hydrogen storage tank and realizing effective mixing with the medium-high pressure natural gas.
Further, the buffer tank is filled with a ceramic filler (e.g., SiO)2、Al2O3Etc.), can make hydrogen and natural gas fully stir the mixture in the buffer tank, can control lower gas pressure drop again, be favorable to the transport of loading natural gas to downstream user.
Furthermore, the shape of the ceramic filler is preferably honeycomb-shaped, and the filled ceramic filler accounts for 20-30% of the volume of the buffer tank.
Furthermore, the system also comprises a gas alarm for monitoring whether the whole system has the problem of hydrogen or/and natural gas leakage or not, and the safety of the whole system is improved.
Has the advantages that:
(1) the mass flowmeter has high monitoring precision, accurate result matching and matching with the mass flow controller, and can realize accurate regulation and control of hydrogen flow and ensure that the hydrogen doping ratio is within a target range.
(2) Under the coordination of the hydrogen compressor, the pressure of hydrogen can be improved, effective mixing with medium-high pressure natural gas is realized, and the application range of the system is widened;
(3) the filling material filled in the buffer tank can promote the hydrogen and the natural gas to be uniformly mixed, can control lower gas pressure drop, and is beneficial to conveying the hydrogen-doped natural gas to downstream users;
(4) the arranged gas alarm can monitor whether the whole system has a gas leakage problem or not, and the safety of the whole system is improved;
the system disclosed by the invention is simple in structure, high in safety, capable of realizing effective mixing of natural gas and hydrogen, small in fluctuation range of the hydrogen doping ratio of the natural gas and good in application prospect.
Drawings
FIG. 1 is a schematic structural diagram of a natural gas loading system in an embodiment.
The system comprises a hydrogen storage tank 1, a hydrogen mass flow controller 2, a hydrogen mass flow meter 3, a natural gas mass flow meter 4, a buffer tank 5, a control module 6, a natural gas pipeline 7 and a natural gas pipeline 8.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Example 1
A natural gas hydrogen-loading system comprises a natural gas pipeline 8, a natural gas mass flow meter 4, a buffer tank 5, a hydrogen storage tank 1, a hydrogen mass flow controller 2, a hydrogen mass flow meter 3 and a control module 6;
the natural gas mass flow meter 4 is arranged on the natural gas pipeline 8 and used for monitoring the flow rate of natural gas in the natural gas pipeline 8 in real time; the hydrogen storage tank 1 is arranged at the front end of the hydrogen pipeline 7 and is used for storing hydrogen and providing a stable hydrogen source for the system; the tail end of the hydrogen pipeline 7 and the tail end of the natural gas pipeline 8 are respectively connected with the buffer tank 5, and the buffer tank 5 is used as a mixing place of hydrogen and natural gas, so that the gas mixing uniformity can be improved; the hydrogen mass flow controller 2 and the hydrogen mass flow meter 3 are arranged on the hydrogen pipeline 7, the hydrogen mass flow controller 2 is positioned between the hydrogen mass flow meter 3 and the hydrogen storage tank 1, and the hydrogen mass flow meter 3 monitors the adjusted hydrogen flow, so that the hydrogen flow in the hydrogen pipeline 7 can be monitored in real time, and the effect of checking and regulating the effect can be achieved; the signal input end of the control system 6 is respectively connected with the hydrogen mass flow meter 3 and the natural gas mass flow meter 4, the signal output end of the control system 6 is connected with the hydrogen mass flow controller 2, and the control module 6 is used for collecting and processing monitoring results of the natural gas mass flow meter 4 and the hydrogen mass flow meter 3 on one hand, and is used for controlling the opening degree of a valve inside the hydrogen mass flow controller 2 to adjust the flow of hydrogen in the hydrogen pipeline 7 on the other hand, so that the hydrogen mixing ratio is in a target ratio range.
Further, when the system is used for carrying out hydrogen doping on the medium-high pressure natural gas, the system also comprises a hydrogen compressor, wherein the hydrogen compressor is arranged on the hydrogen pipeline 7 and can be arranged between the hydrogen mass flow meter 3 and the buffer tank 5, so that the pressure of the hydrogen output by the hydrogen storage tank 1 is improved, and the effective mixing with the medium-high pressure natural gas is realized.
Further, the buffer tank 5 may be filled with a honeycomb-shaped ceramic filler (e.g., SiO)2、Al2O3Etc.), the filled ceramic filler accounts for 20-30% of the volume of the buffer tank 5, so that the hydrogen and the natural gas can be fully stirred and uniformly mixed in the buffer tank 5, the lower gas pressure drop can be controlled, and the conveying of the hydrogen-doped natural gas to downstream users is facilitated.
Furthermore, the system can be provided with a gas alarm for monitoring whether the whole system has the problem of hydrogen or/and natural gas leakage or not, so that the safety of the whole system is improved.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A natural gas hydrogen loading system is characterized in that: the system comprises a natural gas pipeline, a natural gas flowmeter, a buffer tank, a hydrogen storage tank, a hydrogen flow controller, a hydrogen flowmeter and a control module;
the natural gas flowmeter is installed on the natural gas pipeline, the front end of the hydrogen pipeline is connected with the hydrogen storage tank, the tail end of the hydrogen pipeline and the tail end of the natural gas pipeline are respectively connected with the buffer tank, the hydrogen flow controller and the hydrogen flowmeter are installed on the hydrogen pipeline, the hydrogen flow controller is located between the hydrogen flowmeter and the hydrogen storage tank, the signal input end of the control system is respectively connected with the hydrogen flowmeter and the natural gas flowmeter, and the signal output end of the control system is connected with the hydrogen flow controller.
2. A natural gas loading system as claimed in claim 1, wherein: the mass flow meter is selected for both the natural gas flow meter and the hydrogen flow meter, and the mass flow controller is selected for the hydrogen flow controller.
3. A natural gas loading system as claimed in claim 1, wherein: the system also includes a hydrogen compressor mounted on the hydrogen line.
4. A natural gas loading system as claimed in claim 1, wherein: the buffer tank is filled with ceramic filler.
5. A natural gas loading system according to claim 4, wherein: the shape of the ceramic filler is honeycomb.
6. A natural gas loading system as claimed in claim 4 or 5, wherein: the filled ceramic filler accounts for 20-30% of the volume of the buffer tank.
7. A natural gas loading system as claimed in claim 1, wherein: the system also comprises a gas alarm for monitoring whether hydrogen or/and natural gas leakage exists in the whole system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011567497.7A CN113028286A (en) | 2020-12-25 | 2020-12-25 | Natural gas hydrogen-mixing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011567497.7A CN113028286A (en) | 2020-12-25 | 2020-12-25 | Natural gas hydrogen-mixing system |
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| CN113028286A true CN113028286A (en) | 2021-06-25 |
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| CN202011567497.7A Pending CN113028286A (en) | 2020-12-25 | 2020-12-25 | Natural gas hydrogen-mixing system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804854A (en) * | 2021-09-13 | 2021-12-17 | 浙江大学 | Device and method for testing gas component distribution in hydrogen-doped natural gas |
| CN113958871A (en) * | 2021-11-29 | 2022-01-21 | 华电郑州机械设计研究院有限公司 | Natural gas differential pressure hydrogen production and mixing device |
| CN114001278A (en) * | 2021-09-16 | 2022-02-01 | 北京市燃气集团有限责任公司 | Hydrogen-mixing gas mixing method and system for urban gas burning valve station |
| CN114777020A (en) * | 2022-03-25 | 2022-07-22 | 中国船舶重工集团公司第七一八研究所 | Natural gas hydrogen-mixing device and control method thereof |
| CN114877248A (en) * | 2022-05-12 | 2022-08-09 | 中国华能集团清洁能源技术研究院有限公司 | Natural gas hydrogen-loading control system and control method |
| 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 |
| WO2024066459A1 (en) * | 2022-09-30 | 2024-04-04 | 上海飞奥燃气设备有限公司 | Method and system for controlling hydrogen doping concentration in natural gas in fuel gas pipeline |
-
2020
- 2020-12-25 CN CN202011567497.7A patent/CN113028286A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804854A (en) * | 2021-09-13 | 2021-12-17 | 浙江大学 | Device and method for testing gas component distribution in hydrogen-doped natural gas |
| CN114001278A (en) * | 2021-09-16 | 2022-02-01 | 北京市燃气集团有限责任公司 | Hydrogen-mixing gas mixing method and system for urban gas burning valve station |
| CN113958871A (en) * | 2021-11-29 | 2022-01-21 | 华电郑州机械设计研究院有限公司 | Natural gas differential pressure hydrogen production and mixing device |
| CN114777020A (en) * | 2022-03-25 | 2022-07-22 | 中国船舶重工集团公司第七一八研究所 | Natural gas hydrogen-mixing device and control method thereof |
| CN114877248A (en) * | 2022-05-12 | 2022-08-09 | 中国华能集团清洁能源技术研究院有限公司 | Natural gas hydrogen-loading control system and control method |
| WO2024066459A1 (en) * | 2022-09-30 | 2024-04-04 | 上海飞奥燃气设备有限公司 | Method and system for controlling hydrogen doping concentration in natural gas in fuel gas pipeline |
| 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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