CN113418141A - Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation - Google Patents

Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation Download PDF

Info

Publication number
CN113418141A
CN113418141A CN202110674973.3A CN202110674973A CN113418141A CN 113418141 A CN113418141 A CN 113418141A CN 202110674973 A CN202110674973 A CN 202110674973A CN 113418141 A CN113418141 A CN 113418141A
Authority
CN
China
Prior art keywords
hydrogen
compressor
hydrogen supply
branch
site
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110674973.3A
Other languages
Chinese (zh)
Inventor
李璐伶
张姝丽
孟伟
卿亚丽
段鹏飞
李淇
杨喆
廖雯芬
马万军
刘建辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Deep Combustion Gas Technology Research Institute
Shenzhen Gas Corp Ltd
Original Assignee
Shenzhen Deep Combustion Gas Technology Research Institute
Shenzhen Gas Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Deep Combustion Gas Technology Research Institute, Shenzhen Gas Corp Ltd filed Critical Shenzhen Deep Combustion Gas Technology Research Institute
Priority to CN202110674973.3A priority Critical patent/CN113418141A/en
Publication of CN113418141A publication Critical patent/CN113418141A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F17D1/065—Arrangements for producing propulsion of gases or vapours
    • F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
    • 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
    • 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
    • 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
    • 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
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/061—Fluid distribution for supply of supplying vehicles
    • 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
    • Y02E60/32—Hydrogen storage
    • 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
    • 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

Abstract

The invention discloses a hydrogenation station system with complementary on-site hydrogen production and outsourcing hydrogen, which comprises an external hydrogen supply device, an on-site hydrogen production device, a main hydrogen supply path, a hydrogen supply branch path and a pressure regulating branch path, wherein the external hydrogen supply device is connected with the main hydrogen supply path, and the main hydrogen supply path is sequentially provided with a first valve, a first compressor and a hydrogenation device; one end of the hydrogen supply branch is connected with the on-site hydrogen production device, the other end of the hydrogen supply branch is connected to the hydrogen supply main circuit, and a second compressor is arranged on the hydrogen supply branch. According to the invention, the pressure regulating branch and the hydrogen supply branch are provided with the second compressor, so that low-pressure hydrogen prepared by the external hydrogen supply device or the on-site hydrogen production device is firstly introduced into the second compressor to be pressurized and then introduced into the first compressor to be pressurized, the compression ratio of the first compressor during pressurization is reduced, the phenomenon that the compressor is overloaded due to overhigh compression ratio of the compressor is avoided, and the stable and efficient operation of the hydrogenation station is ensured.

Description

Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation
Technical Field
The invention relates to the technical field of hydrogenation, in particular to a hydrogenation station system for complementing on-site hydrogen production and outsourcing hydrogen.
Background
China belongs to a country with large energy consumption, the proportion of fossil energy in primary energy is over 70 percent, and the external dependence of petroleum and natural gas is over 73 percent and 43 percent respectively. Hydrogen energy is used as a link for interaction of conversion, transmission and fusion of numerous primary energy sources, and is the key for realizing net zero emission of carbon dioxide. Meanwhile, hydrogen energy is used as an ideal energy storage medium, so that the large-scale development of renewable energy sources can be supported, the deep decarburization at the terminal can be realized, the energy structure of China can be enriched, and the energy safety can be guaranteed. At present, the application of hydrogen energy mainly refers to the utilization in the traffic field. The hydrogen station is used as a downstream link of a hydrogen energy industry chain, and is a key for ensuring the development of the hydrogen energy fuel cell vehicle industry and realizing zero carbon emission of a terminal.
From the industrial chain perspective, the first problem to be solved by the operation of a hydrogen station is the hydrogen source. The hydrogen belongs to secondary energy and mainly comes from chemical plants, hydrogen production plants or renewable energy sources in remote areas to produce hydrogen, and the hydrogen stations are generally located in cities. The long-tube trailer is adopted to convey high-pressure hydrogen, which causes certain safety risks to city safety, so that various major cities begin to try to use on-site water electrolysis hydrogen production as a hydrogen source. But is limited by the commercial power price, and generally only valley electricity is adopted to produce hydrogen. The valley electricity hydrogen production has certain requirements on the site, and meanwhile, the downstream requirements cannot be met during the overhaul of the device. Therefore, hydrogen production by field electrolysis of water and outsourcing hydrogen are effective guarantee ways for hydrogen sources of the hydrogen station. At present, a hydrogen filling station is mainly filled with high-pressure hydrogen, the key core equipment is a high-pressure compressor, and low-pressure hydrogen needs to be pressurized to high-pressure hydrogen through the high-pressure compressor for filling. Because the state of technology is relatively laggard in China, the high-pressure compressor is imported in multiple positions, and the cost of the high-pressure compressor accounts for about 50% of the cost of the hydrogen filling station. In the existing hydrogen station system, the pressure of hydrogen introduced into an inlet of the compressor is too low, so that the compression ratio of the compressor is too high, the load of the compressor is further too high, the temperature of the pressurized hydrogen is also too high due to the too high compression ratio, the damage of a machine head material is easily caused, the phenomenon that the cooling load of the first cooling water unit at the rear end of the compressor is too high due to the too high temperature is also caused, and the reduction of energy consumption and the guarantee of stable and efficient operation of the hydrogen station are not facilitated.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to solve the technical problem that in the prior art, a hydrogen station system with complementary on-site hydrogen production and outsourcing hydrogen is provided to solve the problem that in the prior art, the compression ratio of a compressor is too high due to too low pressure of hydrogen introduced into a high-pressure compressor, the compressor is damaged due to too high load of the compressor.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a hydrogenation station system with complementary field hydrogen production and outsourcing hydrogen comprises an external hydrogen supply device, a field hydrogen production device, a main hydrogen supply path, a hydrogen supply branch path and a pressure regulating branch path, wherein the external hydrogen supply device is connected with the main hydrogen supply path, a first valve, a first compressor and a hydrogenation device are sequentially arranged on the main hydrogen supply path, and the first compressor is used for pressurizing hydrogen to a first pressure value; one end of the hydrogen supply branch is connected with the on-site hydrogen production device, the other end of the hydrogen supply branch is connected to the hydrogen supply main circuit and is positioned between the first valve and the first compressor, a second compressor is arranged on the hydrogen supply branch, one end of the pressure regulating branch is connected with the external hydrogen supply device, and the other end of the pressure regulating branch is connected with an inlet of the second compressor; the outlet of the on-site hydrogen production device is connected with the inlet of the second compressor, the first compressor is used for pressurizing hydrogen to a second pressure value, and the second pressure value is smaller than the first pressure value.
The hydrogen station system with the complementation of on-site hydrogen production and outsourcing hydrogen is characterized in that the external hydrogen supply device comprises a long tube trailer and an air discharge column, the inlet of the air discharge column is connected with the outlet of the long tube trailer, and the outlet of the air discharge column is connected with the main hydrogen supply path and the hydrogen supply branch path.
The hydrogen station system with the complementation of on-site hydrogen production and outsourcing hydrogen is characterized in that a second valve and a pressure regulating valve are arranged on the pressure regulating branch, and the pressure regulating valve is positioned between the second valve and the second compressor.
The hydrogen station system with the complementation of on-site hydrogen production and outsourcing hydrogen is characterized in that a first cooling water unit is further arranged on the hydrogen supply main path, and an inlet of the first cooling water unit is connected with an outlet of the first compressor.
The hydrogenation station system with the complementation of on-site hydrogen production and outsourcing hydrogen is characterized in that the hydrogenation device comprises a sequence control cabinet and a hydrogenation machine, wherein the sequence control cabinet is positioned between the first cooling water unit and the hydrogenation machine.
The hydrogen station system with the complementation of on-site hydrogen production and outsourcing hydrogen is characterized in that the sequence control cabinet is connected with a first hydrogen storage tank.
The hydrogen station system with the complementation of on-site hydrogen production and outsourcing hydrogen is characterized in that a second cooling water unit is further arranged on the hydrogen supply branch, and an inlet of the second cooling water unit is connected with an outlet of the second compressor.
And the hydrogen station system comprises a hydrogen supply branch and a hydrogen supply branch, wherein the hydrogen supply branch is provided with a second hydrogen storage tank, and an inlet of the second hydrogen storage tank is connected with an outlet of the second cooling water unit.
The hydrogenation station system with the complementation of on-site hydrogen production and outsourcing hydrogen is characterized in that the first pressure value is 45MPa, and the second pressure value is 20 MPa.
Has the advantages that: according to the invention, the pressure regulating branch and the hydrogen supply branch are provided with the second compressor, so that low-pressure hydrogen in the external hydrogen supply device or low-pressure hydrogen prepared by the on-site hydrogen production device is firstly introduced into the second compressor to be pressurized to a second pressure value, and then introduced into the first compressor to be pressurized to a first pressure value, so that the compression ratio of the first compressor during pressurization is reduced, the phenomenon that the compressor is overloaded due to overhigh compression ratio of the first compressor is avoided, the service life of the compressor is prolonged, and the stable and efficient operation of a hydrogenation station is ensured.
Drawings
FIG. 1 is a schematic diagram of a hydrogen station system with complementary on-site hydrogen production and outsourcing provided by the present invention;
the labels in the figures are: 1. an on-site hydrogen production plant; 2. an external hydrogen supply device; 21. tube trailer, 22, gas discharging column, 3: a main hydrogen supply path; 4. a hydrogen supply branch; 5. a first compressor; 6. a second compressor; 7. a first valve; 8. a second valve; 9. a pressure regulating valve; 10. a sequence control cabinet; 11. a hydrogenation machine; 12. a first hydrogen storage tank; 13. a second hydrogen storage tank; 14. a first cooling water unit; 15. a second cooling water unit; 16. a third valve; 17. a fourth valve; 18. a fifth valve; 19. a sixth valve; 20. and a voltage regulating branch.
Detailed Description
The invention provides a hydrogen station system for complementing on-site hydrogen production and outsourcing hydrogen, which is further described in detail below by referring to the attached drawings and embodiments in order to make the purposes, technical schemes and effects of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should also be noted that the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The invention will be further explained by the description of the embodiments with reference to the drawings.
The embodiment provides a hydrogen station system with complementary hydrogen production and outsourcing, as shown in fig. 1, the hydrogen station system includes an external hydrogen supply device 2, a main hydrogen supply path 3 connected to the external hydrogen supply device 2, a hydrogen supply branch path 4, a pressure regulating branch path 20, and an on-site hydrogen production device 1 connected to the hydrogen supply branch path 4, the external hydrogen supply device 2 is used for supplying the outsourcing ready-made hydrogen, and the on-site hydrogen production device is a device for producing hydrogen on site, for example, the on-site hydrogen production device 1 is a water electrolysis hydrogen production device, and hydrogen is produced by using the principle of water electrolysis; the hydrogen that outside hydrogen supply device provided is the hydrogen of outsourcing usually, and hydrogen belongs to the secondary energy, mainly comes from chemical plant, hydrogen manufacturing plant or remote area renewable energy hydrogen manufacturing, and the hydrogenation station generally is located the city, carries high-pressure hydrogen to can cause certain safe risk to city safety, consequently, still adopts in this application on-the-spot hydrogen manufacturing device carries out on-the-spot electrolysis water preparation hydrogen in order as the replenishment to the safe risk that hydrogen transportation brought reduces as far as possible. The main hydrogen supply path 3 is sequentially provided with a first valve 7, a first compressor 5 and a hydrogenation device, and the first valve 7 is close to the external hydrogen supply device 2; the first valve 7 is used for opening or closing the hydrogen main supply path 3, and the first compressor 5 is used for pressurizing the hydrogen gas passing through the external hydrogen supply device 2 to a first pressure value, for example, the first compressor 5 is a 45MPa compressor, and the first pressure value is 45 MPa; the hydrogenation device is used for filling hydrogen into the terminal vehicle-mounted hydrogen storage bottle. One end of the hydrogen supply branch 4 is connected with the on-site hydrogen production device 1, the other end of the hydrogen supply branch 4 is connected with the main hydrogen supply path 3 and is located between the first valve 7 and the first compressor 5, a second compressor 6 is arranged on the hydrogen supply branch 4, one end of the pressure regulating branch 20 is connected with the external hydrogen supply device 2, the other end of the pressure regulating branch is connected with an inlet of the second compressor 6, and the pressure regulating branch 20 is used for regulating the pressure of the hydrogen from the external hydrogen supply device 2 and regulating the pressure to be in accordance with the inlet pressure range of the second compressor 6; the outlet of the on-site hydrogen production device is connected to the inlet of the second compressor 6, the first compressor 5 is configured to pressurize the passing hydrogen to a second pressure value, the second pressure value is smaller than the first pressure value, for example, the second compressor 6 is a 20MPa compressor, the hydrogen inlet pressure of the 20MPa compressor is in a range of 1-3 MPa, and the second pressure value is 20 MPa.
Since the pressure of the hydrogen coming out of the external hydrogen supply device 2 is generally low, and when the pressure is lower than 7MPa, in order to avoid that the equipment with the over-high compression ratio is damaged due to the fact that the hydrogen with the over-low pressure is introduced into the first compressor 5, the first valve 7 can be closed, the hydrogen with the pressure lower than 7MPa is firstly introduced into the pressure regulating branch 20 to be subjected to pressure regulation and is regulated to 1-3 MPa, then the low-pressure hydrogen enters from the inlet of the second compressor 6 to be pressurized to 20MPa by the second compressor 6, and the hydrogen which is pressurized to 20MPa is then introduced into the first compressor 5 to be pressurized to 45MPa, so that the damage to the equipment can be greatly reduced, and the service life of the equipment can be prolonged. When the pressure of the hydrogen gas from the external hydrogen supply device 2 is higher than 7MPa, the hydrogen gas can be directly introduced into the main hydrogen supply path 3 and pressurized to 45MPa by the first compressor 5.
The pressure of the hydrogen produced by the on-site hydrogen production device 1 is about 1-3 MPa, the produced hydrogen is firstly introduced into the second compressor 6 to be pressurized to 20MPa, then introduced into the first compressor 5 to be pressurized to 45MPa, and finally the pressurized high-pressure hydrogen is filled for use.
According to the invention, by arranging the pressure regulating branch 20 and arranging the second compressor 6 on the hydrogen supply branch, the low-pressure hydrogen in the external hydrogen supply device 2 or the low-pressure hydrogen prepared by the on-site hydrogen preparation device 1 can be firstly introduced into the second compressor 6 to be pressurized to a second pressure value, and then introduced into the first compressor 5 to be pressurized to a first pressure value, so that the compression ratio of the first compressor 5 during pressurization is reduced, the phenomenon that the compressor load is too high due to the overhigh compression ratio of the first compressor 5 is avoided, the service life of a 45MPa compressor of a hydrogenation station core device is prolonged, the use cost of the core device is reduced, and the stable and efficient operation of the hydrogenation station is ensured.
The external hydrogen supply device 2 comprises a long tube trailer 21 and an air discharge column 22, wherein an inlet of the air discharge column 22 is connected with an outlet of the long tube trailer 21, an outlet of the air discharge column 22 is connected with the main hydrogen supply path 3 and the pressure regulating branch path 20, and the air discharge column 22 is used for discharging hydrogen in the long tube trailer 21 to the main hydrogen supply path 3 or the pressure regulating branch path 20.
The pressure regulating branch 20 is provided with a second valve 8 and a pressure regulating valve 9, and the pressure regulating valve 9 is positioned between the second valve 8 and the second compressor 6; the second valve 8 is used for opening or closing the hydrogen supply branch 4, the second valve 8 can be an automatic control valve, and can be automatically controlled to be opened or closed according to the detection data of the pressure sensor in the gas discharging column 22, so that manual operation is reduced, and the equipment is more convenient to use; the pressure regulating valve 9 is used for regulating the pressure of the hydrogen, and since the pressure range of the hydrogen introduced into the hydrogen supply branch 4 from the long-tube trailer 21 through the gas discharge column 22 is usually 1-7 MPa, while the pressure range of the hydrogen inlet is 1-3 MPa, the second compressor 6 is a 20MPa compressor, and therefore the pressure of the hydrogen introduced into the hydrogen supply branch 4 needs to be regulated by the pressure regulating valve 9 to 1-3 MPa, and then the hydrogen is introduced into the second compressor 6 for pressurization.
The main hydrogen supply path 3 is further provided with a first cooling water unit 14, an inlet of the first cooling water unit 14 is connected with an outlet of the first compressor 5, and the first cooling water unit 14 is used for cooling the high-temperature hydrogen gas pressurized by the first compressor 5.
The hydrogenation device comprises a sequence control cabinet 10 and a hydrogenation machine 11, the sequence control cabinet is positioned between the first cooling water unit 14 and the hydrogenation machine 11, the sequence control cabinet 10 is connected with a first hydrogen storage tank 12, and the first hydrogen storage tank 12 is a 45MPa hydrogen storage tank; after the first compressor 5 pressurizes the hydrogen and the pressurized high-temperature hydrogen is cooled by the first cooling water unit 14, the hydrogen is introduced into the first hydrogen storage tank 12 through the sequence control cabinet 10 for storage, when hydrogen is needed at the rear end, the hydrogen in the first hydrogen storage tank 12 is introduced into the hydrogenation machine 11 through the sequence control cabinet 10, and then the hydrogen is introduced into a vehicle-mounted hydrogen storage bottle at the rear end through the hydrogenation machine 11. The sequence control cabinet 10 and the hydrogenation unit 11 are common devices in the art, and therefore, detailed description of specific structures of the sequence control cabinet 10 and the hydrogenation unit 11 is omitted in this embodiment.
The hydrogen supply branch 4 is further provided with a second cooling water unit 15, an inlet of the second cooling water unit 15 is connected with an outlet of the second compressor 6, and the second cooling water unit 15 is used for cooling high-temperature hydrogen gas which is pressurized by the second compressor 6; still be provided with second hydrogen storage tank 13 on the hydrogen supply branch road 4, the import of second hydrogen storage tank 13 with the exit linkage of second cooling unit, wherein, second hydrogen storage tank 13 is 20MPa hydrogen storage tank. The hydrogen gas which is pressurized to 20MPa by the second compressor 6 and cooled by the second cooling water unit 15 firstly enters the second hydrogen storage tank 13 to be stored, when the pressure in the first hydrogen storage tank 12 is lower than a preset pressure value, the second hydrogen storage tank 13 starts to deflate to the first compressor 5 to be pressurized to 45MPa, and then is cooled by the first cooling water unit 14 and then is introduced into the sequence control cabinet 10 to be stored in the first storage tank.
In a specific embodiment, the weight of the hydrogen carried by the long-tube trailer 21 is 380 kg, and the pressure is 205MPa, in the conventional process, the long-tube trailer 21 directly discharges the hydrogen to the 45MPa compressor through the gas discharge column 22, and the working pressure of the compressor is required to be imaged, that is, the gas inlet pressure of the compressor is 5MPa or more, so that the gas discharge column 22 at most discharges the pressure of the hydrogen in the long-tube trailer 21 to 5MPa, and the hydrogen discharge amount is about 285 kg at this time. By adopting the hydrogen supply station system, the pressure regulating branch 20 is arranged, the second compressor 6 is arranged on the hydrogen supply branch 4, the pressure of the hydrogen in the long-tube trailer 21 can be relieved to 1MPa, the hydrogen discharge amount is about 361 kg, the hydrogen discharge rate is improved by about 20 percent compared with the conventional process, meanwhile, the transportation cost of the hydrogen purchased in the market at present is usually calculated according to the number of vehicles, for example, the transportation cost is 60 kilometers, the unit cost is 40 yuan/kilometer, the single-trip transportation cost is 2400 yuan, the transportation cost of the hydrogen is 8.42 yuan/kg, and if the hydrogen supply station system is adopted, the transportation cost of the hydrogen is reduced to 6.64 yuan/kg; therefore, the utilization rate of the hydrogen in the long pipe trailer is greatly improved, and the transportation cost of the hydrogen is also reduced.
Further, when the pressure of the hydrogen introduced into the inlet of the first compressor 5 is too low, the compression ratio of the compressor will be too high, and further the load of the compressor will be too high, and the temperature of the pressurized hydrogen will be too high due to the too high compression ratio, so that the material of the machine head is easily damaged, and the cooling load of the first cooling water unit 14 at the rear end of the first compressor 5 will be too high due to the too high temperature, which is not favorable for reducing energy consumption and ensuring the stable and efficient operation of the hydrogen station. For example, when the case where the compression ratio of a 45MPa compressor, the theoretical outlet temperature and the theoretical compression energy consumption are calculated at an inlet temperature of 35 ℃ when the hydrogen pressure is 7MPa or less and compared with the 20MPa inlet pressure is employed, the results are shown in the following table:
Figure BDA0003119553600000081
Figure BDA0003119553600000091
as can be seen from the above table, when the hydrogen inlet pressure is 20MPa, the compression ratio is lower, the theoretical outlet temperature is lower, and the energy consumption of the corresponding compressor is also lower; when the pressure of the hydrogen inlet is decreased gradually from 7MPa, the compression ratio of the first compressor 5 is increased gradually, the theoretical outlet temperature is increased gradually, and the energy consumption of the corresponding compressor is increased gradually, so that the hydrogen supply branch 4 and the second compressor 6 are arranged, low-pressure hydrogen is firstly introduced into the second compressor 6 for pressurization and then introduced into the first compressor 5 for pressurization, the compression ratio of the first compressor 5 during pressurization can be reduced, the phenomenon that the compressor is overloaded due to overhigh compression ratio of the compressor is avoided, and the phenomenon that the compressor is overloaded due to overhigh outlet temperature of the compressor is avoided, so that the service life of core equipment of the hydrogenation station is prolonged, and the stable and efficient operation of the hydrogenation station is ensured.
Further, in consideration of the cost of on-site hydrogen production, while the cost of electricity is mainly considered for hydrogen production by water electrolysis, so that the on-site hydrogen production device 1 is limited by the price of commercial power, and generally adopts valley electricity to produce hydrogen.
Example one
During the off-peak electricity period, the electricity price is slightly lower, so that hydrogen production by electrolyzing water on site is mainly used, and the long-tube trailer 21 is not discharged through the gas discharging column 22; the pressure of the hydrogen prepared by the on-site hydrogen production device 1 is about 1-3 MPa, the temperature is about 35 ℃, and the pressure meets the inlet requirement of a compressor with 20MPa, so that the prepared hydrogen is directly introduced into the second compressor 6 to be pressurized to 20MPa, is cooled to 30-45 ℃ by the second cooling water unit 15, and is introduced into the second hydrogen storage tank 13 to be stored. When the pressure in the first hydrogen storage tank 12 is lower than a preset pressure value, the second hydrogen storage tank 13 starts to be deflated until the pressure in the first compressor 5 is increased to 45MPa, the pressurized high-temperature hydrogen is cooled to 30 ℃ by the first cooling water unit 14, and then the high-temperature hydrogen is introduced into the first hydrogen storage tank 12 through the sequence control cabinet 10. When hydrogen is needed at the rear end, the hydrogen in the first hydrogen storage tank 12 is introduced into the sequence control cabinet 10, enters the hydrogenation machine 11, and is injected into the terminal vehicle-mounted hydrogen storage bottle through the hydrogenation machine 11.
Example two
In the off-peak electricity period, the hydrogen station does not adopt the on-site hydrogen production device 1 to produce hydrogen by electrolyzing water, but mainly purchases hydrogen, because the electricity price cost is high. The long tube trailer 21 unloads gas through the gas unloading column 22, when the pressure of the unloaded hydrogen is higher than 7MPa, the second valve 8 is closed, the first valve 7 is opened, the hydrogen discharged from the outlet of the gas unloading column 22 is directly introduced into the first compressor 5 to be pressurized to 45MPa, and then is directly introduced into the first hydrogen storage tank 12 through the sequence control cabinet 10 to be stored after being cooled by the first cooling water unit 14. When the pressure of the hydrogen discharged from the gas discharge column 22 is lower than 7MPa, closing the first valve 7, opening the second valve 8, regulating the pressure of the hydrogen at the outlet of the gas discharge column 22 to 1-3 MPa through the pressure regulating valve 9, continuously flowing the hydrogen into the second compressor 6 to pressurize to 20MPa, cooling the pressurized high-temperature hydrogen to 30-45 ℃ through the second cooling water unit 15, and then introducing the hydrogen into the second hydrogen storage tank 13 to store; when the pressure in the first hydrogen storage tank 12 is lower than a preset value, the second hydrogen storage tank 13 starts to be deflated to the first compressor 5 and is pressurized to 45MPa, then the second hydrogen storage tank is cooled by the first cooling water unit 14 and then is introduced into the sequence control cabinet 10 to be stored in the first storage tank, and when hydrogen is needed at the rear end, the hydrogen in the first hydrogen storage tank 12 is introduced into the sequence control cabinet 10 and then enters the hydrogenation machine 11, and the hydrogen is injected into a vehicle-mounted terminal hydrogen storage bottle through the hydrogenation machine 11.
The hydrogen main supply path 3 is further provided with a third valve 16 and a fourth valve 17, the third valve 16 is located between the first valve 7 and the first compressor 5, the fourth valve 17 is located between the first cooling water unit 14 and the sequence control cabinet 10, normally, the third valve 16 and the fourth valve 17 are both in a normally open state, and the third valve 16 and the fourth valve 17 need to be closed only when the first compressor 5 and/or the first cooling water unit 14 needs to be overhauled. The hydrogen supply branch 4 is further provided with a fifth valve 18 and a sixth valve 19, the fifth valve 18 is located between the pressure regulating valve 9 and the second compressor 6, the sixth valve 19 is located between the second cooling water unit 15 and the second hydrogen storage tank 12, generally, the fifth valve 18 and the sixth valve 19 are both in a normally open state, and the fifth valve 18 and the sixth valve 19 need to be closed only when the second compressor 6 and/or the second cooling water unit 15 needs to be overhauled.
In summary, the present invention discloses a hydrogen station system with complementary onsite hydrogen production and outsourcing hydrogen production, which includes an external hydrogen supply device, an onsite hydrogen production device, a main hydrogen supply path, a branch hydrogen supply path and a pressure regulating path, wherein the external hydrogen supply device is connected to the main hydrogen supply path, and the main hydrogen supply path is sequentially provided with a first valve, a first compressor and a hydrogenation device, and the first compressor is used for pressurizing hydrogen to a first pressure value; one end of the hydrogen supply branch is connected with the on-site hydrogen production device, the other end of the hydrogen supply branch is connected to the hydrogen supply main circuit and is positioned between the first valve and the first compressor, a second compressor is arranged on the hydrogen supply branch, one end of the pressure regulating branch is connected with the external hydrogen supply device, and the other end of the pressure regulating branch is connected with an inlet of the second compressor; the outlet of the on-site hydrogen production device is connected with the inlet of the second compressor, the first compressor is used for pressurizing hydrogen to a second pressure value, and the second pressure value is smaller than the first pressure value. According to the invention, the pressure regulating branch and the second compressor are arranged on the hydrogen supply branch, so that low-pressure hydrogen in the external hydrogen supply device or low-pressure hydrogen prepared by the on-site hydrogen production device is firstly introduced into the second compressor to be pressurized to a second pressure value, and then introduced into the first compressor to be pressurized to a first pressure value, so that the compression ratio of the first compressor during pressurization is reduced, the phenomenon that the compressor is overloaded due to overhigh compression ratio of the first compressor is avoided, the service life of a 45MPa compressor of a hydrogenation station core device is prolonged, and stable and efficient operation of the hydrogenation station is ensured.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (9)

1. A hydrogenation station system with complementary field hydrogen production and outsourcing hydrogen is characterized by comprising an external hydrogen supply device, a field hydrogen production device, a main hydrogen supply path, a hydrogen supply branch path and a pressure regulating branch path, wherein the external hydrogen supply device is connected with the main hydrogen supply path, a first valve, a first compressor and a hydrogenation device are sequentially arranged on the main hydrogen supply path, and the first compressor is used for pressurizing hydrogen to a first pressure value; one end of the hydrogen supply branch is connected with the on-site hydrogen production device, the other end of the hydrogen supply branch is connected to the hydrogen supply main circuit and is positioned between the first valve and the first compressor, a second compressor is arranged on the hydrogen supply branch, one end of the pressure regulating branch is connected with the external hydrogen supply device, and the other end of the pressure regulating branch is connected with an inlet of the second compressor; the outlet of the on-site hydrogen production device is connected with the inlet of the second compressor, the first compressor is used for pressurizing hydrogen to a second pressure value, and the second pressure value is smaller than the first pressure value.
2. The system of claim 1, wherein the external hydrogen supply device comprises a long-tube trailer and an air discharge column, an inlet of the air discharge column is connected with an outlet of the long-tube trailer, and an outlet of the air discharge column is connected with the main hydrogen supply path and the branch hydrogen supply path.
3. The system of claim 1, wherein the pressure regulating branch comprises a second valve and a pressure regulating valve, and the pressure regulating valve is located between the second valve and the second compressor.
4. The on-site hydrogen production and outsourcing hydrogen complementary hydrogen refueling station system according to claim 1, wherein a first cooling water unit is further arranged on the hydrogen supply main path, and an inlet of the first cooling water unit is connected with an outlet of the first compressor.
5. The on-site hydrogen production and outsourcing hydrogen complementary hydroprocessing station system of claim 4, wherein the hydroprocessing device comprises a sequence control cabinet and a hydroprocessing machine, wherein the sequence control cabinet is positioned between the first cooling water unit and the hydroprocessing machine.
6. The complementary on-site hydrogen production and outsourcing hydrogen station system according to claim 5, wherein the sequence control cabinet is connected with a first hydrogen storage tank.
7. The on-site hydrogen production and outsourcing hydrogen complementary hydrogen station system according to claim 1, wherein a second cooling water unit is further arranged on the hydrogen supply branch, and an inlet of the second cooling water unit is connected with an outlet of the second compressor.
8. The on-site hydrogen production and outsourcing hydrogen complementary hydrogen station system according to claim 7, wherein a second hydrogen storage tank is arranged on the hydrogen supply branch, and an inlet of the second hydrogen storage tank is connected with an outlet of the second cooling water unit.
9. The on-site hydrogen production and outsourcing hydrogen complementary hydrogen station system according to claim 1, wherein the first pressure value is 45MPa, and the second pressure value is 20 MPa.
CN202110674973.3A 2021-06-17 2021-06-17 Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation Pending CN113418141A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110674973.3A CN113418141A (en) 2021-06-17 2021-06-17 Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110674973.3A CN113418141A (en) 2021-06-17 2021-06-17 Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation

Publications (1)

Publication Number Publication Date
CN113418141A true CN113418141A (en) 2021-09-21

Family

ID=77788955

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110674973.3A Pending CN113418141A (en) 2021-06-17 2021-06-17 Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation

Country Status (1)

Country Link
CN (1) CN113418141A (en)

Similar Documents

Publication Publication Date Title
CN109185699B (en) Hydrogenation method and system simultaneously suitable for filling pressure of 70MPa and 35MPa
CN102155615B (en) LNG (liquefied natural gas) pump-free air-entrapping method with BOG (boil off gas) recycling function and LNG pump-free air-entrapping device
CN112483886A (en) Liquid hydrogen storage type hydrogenation device adopting liquid hydrogen pre-cooling
CN109708000B (en) L-CH2 type hydrogen station heat management system
CN109163214B (en) Hydrogenation station
CN202158352U (en) L-CNG (liquefied-compressed natural gas) dual-gas resource gas supply device
CN110594579B (en) Multifunctional hydrogen refueling station hydrogen fuel refueling system
CN214249133U (en) Liquid hydrogen storage type hydrogenation device adopting liquid hydrogen precooling
CN113375045B (en) BOG recycling system and method for liquid hydrogen refueling station
CN112483887A (en) Buried liquid hydrogen storage type hydrogenation device
CN216307425U (en) Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation
CN115388324A (en) Gas-liquid hydrogen combined supply hydrogenation station
CN104165266B (en) A kind of pressure reduction formula liquefied natural gas filling station adds injection system and method thereof
CN215674743U (en) Mixed filling system applied to liquid hydrogen filling station
CN113130940B (en) Fuel cell automobile hydrogen storage system with high-pressure hydrogen cylinder and low-pressure hydrogen cylinder mixed
CN113418141A (en) Hydrogenation station system with on-site hydrogen production and outsourcing hydrogen complementation
CN205118654U (en) System for BOG who retrieves production of LNG storage tank is as hydrogen manufacturing fuel gas
CN213299608U (en) Multi-mode hydrogenation station
CN215862878U (en) Hydrogen supply system pipeline
CN115419822A (en) Liquid hydrogen storage and transportation type hydrogen filling system for hydrogen refueling station by using cold energy generated by para-ortho hydrogen conversion
CN208457567U (en) The LNG refueling system of low energy consumption with BOG recycling function
CN219912659U (en) Hydrogen production, hydrogen storage and hydrogenation integrated system based on renewable energy sources
CN207848962U (en) A kind of mobile CNG air entraining substations of energy power itself
CN111365610A (en) Discharging pressure regulating system applied to hydrogen storage type hydrogen adding station
CN217928247U (en) Hydrogen production hydrogenation electricity generation integration platform

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination