CN113007596A - Hydrogen filling system and hydrogenation station - Google Patents

Hydrogen filling system and hydrogenation station Download PDF

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Publication number
CN113007596A
CN113007596A CN202110073351.5A CN202110073351A CN113007596A CN 113007596 A CN113007596 A CN 113007596A CN 202110073351 A CN202110073351 A CN 202110073351A CN 113007596 A CN113007596 A CN 113007596A
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CN
China
Prior art keywords
pressure
hydrogen
medium
storage tank
hydrogen storage
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
CN202110073351.5A
Other languages
Chinese (zh)
Inventor
刘玮
董斌琦
陈莉莉
冯沛
张舒燕
刘飞
侯剑英
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.)
National Energy Group Hydrogen Technology Co ltd
Shenhua New Energy Co Ltd
Original Assignee
National Energy Group Hydrogen Technology Co ltd
Shenhua New Energy Co 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 National Energy Group Hydrogen Technology Co ltd, Shenhua New Energy Co Ltd filed Critical National Energy Group Hydrogen Technology Co ltd
Priority to CN202110073351.5A priority Critical patent/CN113007596A/en
Publication of CN113007596A publication Critical patent/CN113007596A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C5/00Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C7/00Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00Pipe-line systems
    • F17D1/02Pipe-line systems for gases or vapours
    • F17D1/065Arrangements for producing propulsion of gases or vapours
    • F17D1/07Arrangements for producing propulsion of gases or vapours by compression
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352Pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/01Pure fluids
    • F17C2221/012Hydrogen
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2227/00Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01Propulsion of the fluid
    • F17C2227/0128Propulsion of the fluid with pumps or compressors
    • F17C2227/0157Compressors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2250/00Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/01Intermediate tanks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2265/00Effects achieved by gas storage or gas handling
    • F17C2265/06Fluid distribution
    • F17C2265/065Fluid distribution for refueling vehicle fuel tanks
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/32Hydrogen storage
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/34Hydrogen distribution

Abstract

The invention provides a hydrogen filling system and a hydrogen filling station, wherein the hydrogen filling system comprises: the hydrogen discharging unit, the compression unit, the hydrogen storage unit and the filling unit are sequentially connected; the compression unit pressurizes the hydrogen and then conveys the hydrogen to the hydrogen storage unit, and the filling unit fills the hydrogen to the terminal vehicle; the compression unit comprises a main compressor and an auxiliary compressor which are connected with the hydrogen unloading unit in parallel, the main compressor comprises a high-pressure main compressor and a medium-pressure main compressor which are connected in parallel, and the auxiliary compressor comprises two working modes of low-pressure output pressure and medium-pressure output pressure. Through the auxiliary compressors with different working modes, on one hand, hydrogen in the long-tube trailer can be more fully conveyed out, the residual pressure of the hydrogen in the long-tube trailer is reduced, and the transportation efficiency of the long-tube trailer is improved, and on the other hand, when the main compressor breaks down and stops running and maintenance, the normal operation of the hydrogenation station is maintained through the medium-high pressure output of the auxiliary compressors.

Description

Hydrogen filling system and hydrogenation station
Technical Field
The invention relates to the technical field of hydrogen energy, in particular to a hydrogen filling system and a hydrogen station.
Background
The fixed hydrogenation station generally comprises a compressor system, a hydrogen storage tank system and a hydrogenation machine system. The hydrogenation capacity of the stationary hydrogenation station is expressed by the compression capacity of a hydrogen compressor, for example, the compression capacity of the hydrogen compressor of the hydrogenation station with the hydrogenation capacity of 200kg/d is generally 20kg/h (the daily working time of the compressor is 10 h).
The compressor is the main equipment investment of the hydrogenation station, accounts for 20-40% of the project investment cost, a standby compressor is not generally arranged in the construction process of the fixed hydrogenation station, and the hydrogenation station needs to be shut down for maintenance when the compressor is maintained or fails. The lowest inlet pressure of the compressor of the extra hydrogen station can only reach about 5MPa, even a part of the compressors can only reach 7MPa, so that the pressure of the residual hydrogen in a long pipe trailer for transporting the hydrogen is higher, the transportation efficiency of the hydrogen is seriously influenced, and the transportation cost of the unit hydrogen is increased.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a hydrogen filling system and a hydrogen station, which can effectively improve the transportation efficiency of hydrogen and greatly reduce the energy consumption of hydrogenation.
The invention provides a hydrogen filling system, comprising: the hydrogen discharging unit, the compression unit, the hydrogen storage unit and the filling unit are sequentially connected;
the compression unit pressurizes the hydrogen and then conveys the hydrogen to the hydrogen storage unit, and the filling unit fills the hydrogen to the terminal vehicle;
the compression unit comprises a main compressor and an auxiliary compressor which are connected with the hydrogen unloading unit in parallel, the main compressor comprises a high-pressure main compressor and a medium-pressure main compressor which are connected in parallel, and the auxiliary compressor comprises two working modes of low-pressure output pressure and medium-pressure output pressure.
Further, the auxiliary compressor also includes a high pressure output pressure mode of operation.
Further, the hydrogen unloading unit is connected with a long tube trailer for conveying hydrogen, and when the auxiliary compressor outputs low pressure, the minimum inlet pressure of the auxiliary compressor is greater than or equal to the minimum working pressure of the long tube trailer.
Further, the hydrogen storage unit comprises a high-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank and a low-pressure hydrogen storage tank;
the high-pressure hydrogen storage tank is connected with the high-pressure main compressor, the medium-pressure hydrogen storage tank is connected with the medium-pressure main compressor, and the low-pressure hydrogen storage tank is connected with the auxiliary compressor.
Further, a medium-pressure air inlet branch is arranged between the low-pressure hydrogen storage tank and an air inlet of the medium-pressure main compressor and used for enabling the medium-pressure main compressor to pressurize the hydrogen in the low-pressure hydrogen storage tank and then convey the hydrogen to the medium-pressure hydrogen storage tank.
Further, a high-pressure air inlet branch is arranged between the medium-pressure hydrogen storage tank and an air inlet of the high-pressure main compressor and used for enabling the high-pressure main compressor to pressurize hydrogen in the medium-pressure hydrogen storage tank and then convey the hydrogen to the high-pressure hydrogen storage tank.
Further, the gas outlet of the auxiliary compressor, the medium-pressure hydrogen storage tank and the high-pressure hydrogen storage tank are respectively connected with a medium-pressure gas outlet bypass and a high-pressure gas outlet bypass.
Further, the medium-pressure hydrogen storage tank includes two of different pressure levels.
Further, the filling unit comprises a low-pressure hydrogenation machine and a high-pressure hydrogenation machine, and the low-pressure hydrogenation machine and the high-pressure hydrogenation machine are respectively communicated with the high-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the low-pressure hydrogen storage tank.
A hydrogenation station comprises the hydrogen filling system.
The auxiliary compressor with different working modes in the hydrogen filling system has the dual functions of hydrogen unloading, pressurization and pressure increasing storage, on one hand, the hydrogen in the long-tube trailer can be more fully conveyed out, the residual pressure of the hydrogen in the long-tube trailer is reduced, the transportation efficiency of the long-tube trailer is improved, on the other hand, the standby function of the auxiliary compressor can be realized, and when the main compressor breaks down and is stopped for maintenance, the normal operation of a hydrogen filling station is maintained through the high-pressure output of the auxiliary compressor.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a system diagram of a hydrogen filling system according to the present invention.
In the figure: 1-unloading column, 2-long tube trailer, 3-terminal vehicle, 41-high pressure main compressor, 42-medium pressure main compressor, 5-auxiliary compressor, 51-medium pressure gas outlet bypass, 52-high pressure gas outlet bypass, 61-high pressure hydrogen storage tank, 62-medium pressure hydrogen storage tank, 63-low pressure hydrogen storage tank, 64-medium pressure gas inlet branch, 65-high pressure gas inlet branch, 71-low pressure hydrogenation machine, 72-high pressure hydrogenation machine.
In the drawings, like parts are designated with like reference numerals, and the drawings are not to scale.
Detailed Description
In order to clearly illustrate the inventive content of the present invention, the present invention will be described below with reference to examples.
In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the hydrogen filling system of the present invention comprises a hydrogen unloading unit, a compression unit, a hydrogen storage unit and a filling unit which are sequentially connected by a pipeline; the hydrogen unloading unit comprises a unloading column 1, a long tube trailer 2 for conveying hydrogen is connected to the unloading column 1, the compression unit pressurizes the hydrogen in the long tube trailer 2 and then conveys the hydrogen to the hydrogen storage unit, and the hydrogen is filled into the terminal vehicle 3 through the filling unit.
After the long tube trailer 2 filled with hydrogen enters the field, the long tube trailer 2 is in butt joint with the interface on the unloading column 1 through the conveying hose, so that the connection between the long tube trailer 2 and the unloading column 1 is realized, after the long tube trailer 2 is ready to be in place, the valve on the long tube trailer 2 is opened, the hydrogen is output from the long tube trailer 2 and enters the unloading column 1, and meanwhile, the compressor in the compression unit is started to pressurize the hydrogen.
The compression unit includes parallelly connected high pressure main compressor 41 that sets up, middling pressure main compressor 42 and auxiliary compressor 5, auxiliary compressor 5's compressive capacity is less than two main compressor's compressive capacity, high pressure main compressor 41, middling pressure main compressor 42 and auxiliary compressor 5 parallel connection are on unloading post 1, main compressor and auxiliary compressor 5's selectivity when can realizing unloading or pressure boost, satisfy the pressure boost demand of hydrogen under different operating modes, auxiliary compressor 5 includes the mode of two kinds of different output pressure at least, auxiliary compressor 5 includes the mode of low pressure (20MPa) and middling pressure (45MPa) output pressure at least promptly.
Under normal operating mode, assist compressor 5 to carry out the low pressure output of hydrogen, with the hydrogen pressure boost in the long-tube trailer 2, when the main compressor trouble, assist compressor 5 and can move under the output pressure according to middling pressure main compressor 42, send the hydrogen pressure boost in the long-tube trailer 2 to the middling pressure after to store up hydrogen unit, maintain the normal operation at hydrogenation station.
In one embodiment, the auxiliary compressor 5 further includes a high-pressure output pressure operation mode, so that the auxiliary compressor 5 can meet the working condition requirements of different output pressures of high pressure, medium pressure and low pressure at the same time, and the definition of the pressure class in the present invention is a conventional choice in the field of hydrogen storage and transportation, specifically, the high pressure indicated in the present invention is 87.5MPa, the medium pressure is 45MPa, and the low pressure is 20MPa, which is not described herein again.
When the auxiliary compressor 5 is in a working mode of normal low-pressure output, the minimum inlet pressure of the auxiliary compressor is greater than or equal to the minimum working pressure of the long tube trailer 2, and under the working condition, because the pressure difference before and after the compression of the auxiliary compressor 5 is smaller, the auxiliary compressor 5 can be enabled to be normally operated and simultaneously maintain relatively higher output flow, namely the auxiliary compressor 5 has the functions of low inlet pressure and high output flow when outputting at low pressure, the inlet pressure of the auxiliary compressor 5 can be as low as 1MPa when the auxiliary compressor is normally operated, the residual pressure of hydrogen in the long tube trailer 2 can be greatly reduced, and the hydrogen can be more fully conveyed out of the long tube trailer 2; and the auxiliary compressor 5 can quickly pressurize and transfer the hydrogen entering the unloading column 1 to the hydrogen storage unit through relatively high output flow when outputting at low pressure, thereby effectively improving the unloading efficiency of the long-tube trailer 2.
In one preferred embodiment, the hydrogen storage unit comprises a plurality of hydrogen storage tanks including a high-pressure hydrogen storage tank 61, a medium-pressure hydrogen storage tank 62 (preferably medium-pressure hydrogen storage tanks of two different pressure levels connected in parallel), and a low-pressure hydrogen storage tank 63, wherein the high-pressure hydrogen storage tank 61 is connected with the high-pressure main compressor 41, the medium-pressure hydrogen storage tank 62 is connected with the medium-pressure main compressor 42, and the low-pressure hydrogen storage tank 63 is connected with the auxiliary compressor 5. When the hydrogen in the tube trailer 2 is pressurized, the hydrogen is pressurized and stored in the high-pressure hydrogen storage tank 61 through the high-pressure main compressor 41; with the output of hydrogen, when the pressure in the long-tube trailer 2 is reduced, the air inlet channel of the high-pressure main compressor 41 is cut off, the high-pressure main compressor 41 is closed, and the hydrogen is pressurized and stored in the medium-pressure hydrogen storage tank 62 through the medium-pressure main compressor 42; when the pressure in the pipe trailer 2 is further reduced along with the output of the hydrogen gas, the air inlet passage of the medium-pressure main compressor 42 is cut off and the medium-pressure main compressor 42 is closed, and the hydrogen gas is pressurized and stored in the low-pressure hydrogen storage tank 63 by the auxiliary compressor 5.
Through the staged pressurization storage, the power consumption of the compressor can be effectively reduced, the working condition that the trolley is pulled by a big horse is avoided, and the compressors can keep relatively high output flow rate through the matched pressurization operation, so that the hydrogen unloading efficiency of the long-tube trailer 2 is improved. It is important to point out that when the pressure of hydrogen reduces to less level in the long tube trailer 2, the residual pressure of hydrogen in the long tube trailer 2 is effectively reduced through the pressure boost operation of assisting compressor 5, and the entry pressure of assisting compressor 5 can be as low as 1MPa in this embodiment, can make the hydrogen in the long tube trailer 2 obtain the output more fully, has greatly improved the transport efficiency of hydrogen.
In another preferred embodiment, an intermediate pressure inlet branch 64 is provided between the low pressure hydrogen storage tank 63 and the inlet of the intermediate pressure main compressor 42, so that the intermediate pressure main compressor 42 can pressurize the hydrogen gas in the low pressure hydrogen storage tank 63 and then deliver the pressurized hydrogen gas to the intermediate pressure hydrogen storage tank 62; a high-pressure inlet branch 65 is further provided between the medium-pressure hydrogen storage tank 62 and the inlet of the high-pressure main compressor 41, and is used for enabling the high-pressure main compressor 41 to pressurize the hydrogen gas in the medium-pressure hydrogen storage tank 62 and then deliver the pressurized hydrogen gas to the high-pressure hydrogen storage tank 61.
By the arrangement of the above-described intake branch, a stepped stepwise pressure-increasing state is constituted, that is, the auxiliary compressor 5 stores the hydrogen gas in the low-pressure hydrogen storage tank 63 in a pressure-increasing manner, the medium-pressure main compressor 42 stores the hydrogen gas in the low-pressure hydrogen storage tank 63 in the medium-pressure hydrogen storage tank 62 in a pressure-increasing manner, and the high-pressure main compressor 41 stores the hydrogen gas in the medium-pressure hydrogen storage tank 62 in the high-pressure hydrogen storage tank 61 in a pressure-increasing manner. The compression ratio and the operation power consumption of the compressors with different pressure grades are further considered, and the comprehensive energy consumption in the aspect of pressurizing and storing of the hydrogen filling system can be fundamentally reduced.
The backup function of the auxiliary compressor 5 in this embodiment is realized by communicating the auxiliary compressor with the medium-pressure hydrogen storage tank 62 and the high-pressure hydrogen storage tank 61, specifically, the auxiliary compressor 5 is communicated with the low-pressure hydrogen storage tank 63, and on an air outlet pipeline thereof, the auxiliary compressor 5 is further provided with a medium-pressure air outlet bypass 51 communicated with the medium-pressure hydrogen storage tank 62 and a high-pressure air outlet bypass 52 communicated with the high-pressure hydrogen storage tank 61, respectively, when the medium-pressure main compressor 42 or the high-pressure main compressor 41 fails, the auxiliary compressor 5 can work under the output pressure of the main compressor, that is, the hydrogen in the long pipe trailer 2 is pressurized to the medium pressure (45MPa) or the high pressure (87.5MPa) according to the working mode of the medium-pressure or the high-pressure output pressure, so as to realize that the low-load operation requirement of the hydrogen filling station is maintained under the failure state of the.
In other preferred technical solutions, the medium-pressure hydrogen storage tank 62 includes a hydrogen storage tank between a low pressure and a high pressure, specifically includes medium-pressure hydrogen storage tanks 62 with two pressure levels of 30MPa and 45MPa, and the two medium-pressure hydrogen storage tanks 62 are arranged in parallel. The filling unit comprises a low-pressure hydrogenation machine 71 with the filling pressure of 35MPa and a high-pressure hydrogenation machine 72 with the filling pressure of 70MPa, and the low-pressure hydrogenation machine 71 and the high-pressure hydrogenation machine 72 are respectively communicated with the 20MPa low-pressure hydrogen storage tank 63, the 30MPa medium-pressure hydrogen storage tank 62, the 45MPa medium-pressure hydrogen storage tank 62 and the 87.5MPa high-pressure hydrogen storage tank 61.
And during hydrogenation operation, the hydrogenation machine performs filling according to a set program according to the pressure difference between the pressure of the storage tank of the terminal vehicle and the pressure difference between the hydrogen storage tanks with different pressure grades, and when the filling speed is less than or equal to the set filling speed, the hydrogenation machine is switched to the hydrogen storage tank with a higher grade until the fullness degree of the terminal vehicle meets the filling requirement.
By setting the high-pressure hydrogenation machine and the low-pressure hydrogenation machine with different pressure grades, the hydrogenation machine can be selected according to the actual pressure of the storage tank of the terminal vehicle, and the pressure difference between the hydrogen storage tank and the storage tank of the terminal vehicle is fully utilized for filling; by arranging the hydrogen storage tanks with different pressure grades, the hydrogen storage tank with higher pressure can be selected to fill the terminal vehicle in a targeted manner on the basis of the pressure difference between the hydrogen storage tanks and the terminal vehicle, and the static potential energy formed by the pressure difference is fully utilized to reduce the hydrogenation energy consumption on the premise of improving the filling efficiency, so that the comprehensive energy consumption in the aspect of terminal filling of the hydrogen filling system is reduced.
The invention also provides a hydrogen station comprising the hydrogen filling system, which can reduce the equipment investment cost and the comprehensive operation cost of the hydrogen station on the premise of effectively ensuring the normal operation of the hydrogen station.
It should be noted that the main compressor may be provided with only one medium-pressure main compressor in addition to the high-pressure main compressor and the medium-pressure main compressor, and the technical effects of improving the transportation efficiency of hydrogen and reducing the energy consumption of the hydrogen filling system in the invention can be achieved by matching the auxiliary compressor and the medium-pressure main compressor with two different working modes of output pressure (low pressure and medium pressure); of course, in order to broaden the selectivity of the filling unit to the hydrogen storage tank, the number and pressure level of the hydrogen storage tank can be adjusted according to actual needs, and are not described in detail.
Finally, it is to be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not intended to be limiting. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as within the scope of the invention.

Claims (10)

1. A hydrogen gas filling system, comprising: the hydrogen discharging unit, the compression unit, the hydrogen storage unit and the filling unit are sequentially connected;
the compression unit pressurizes the hydrogen and then conveys the hydrogen to the hydrogen storage unit, and the filling unit fills the hydrogen to the terminal vehicle;
the compression unit comprises a main compressor and an auxiliary compressor which are connected with the hydrogen unloading unit in parallel, the main compressor comprises a high-pressure main compressor and a medium-pressure main compressor which are connected in parallel, and the auxiliary compressor comprises two working modes of low-pressure output pressure and medium-pressure output pressure.
2. A hydrogen filling system according to claim 1, wherein the secondary compressor further comprises a high pressure output pressure mode of operation.
3. A hydrogen filling system as claimed in claim 1, wherein the hydrogen discharge unit is connected with a long-tube trailer for delivering hydrogen, and the auxiliary compressor has a minimum inlet pressure at low pressure output which is greater than or equal to the minimum working pressure of the long-tube trailer.
4. A hydrogen gas filling system according to claim 1, wherein the hydrogen storage unit includes a high-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank, and a low-pressure hydrogen storage tank;
the high-pressure hydrogen storage tank is connected with the high-pressure main compressor, the medium-pressure hydrogen storage tank is connected with the medium-pressure main compressor, and the low-pressure hydrogen storage tank is connected with the auxiliary compressor.
5. A hydrogen filling system according to claim 4, wherein a medium-pressure air inlet branch is arranged between the low-pressure hydrogen storage tank and the air inlet of the medium-pressure main compressor, and is used for enabling the medium-pressure main compressor to pressurize the hydrogen in the low-pressure hydrogen storage tank and then convey the pressurized hydrogen to the medium-pressure hydrogen storage tank.
6. The hydrogen filling system according to claim 4, wherein a high-pressure inlet branch is provided between the medium-pressure hydrogen storage tank and an inlet of the high-pressure main compressor, so that the high-pressure main compressor can pressurize the hydrogen in the medium-pressure hydrogen storage tank and then deliver the pressurized hydrogen to the high-pressure hydrogen storage tank.
7. A hydrogen gas filling system according to claim 4, wherein the gas outlet of the auxiliary compressor and the medium-pressure and high-pressure hydrogen storage tanks are connected with a medium-pressure gas outlet bypass and a high-pressure gas outlet bypass, respectively.
8. A hydrogen gas filling system according to claim 4, wherein the medium-pressure hydrogen storage tank includes two of different pressure levels.
9. A hydrogen gas filling system according to any one of claims 4 to 8, wherein the filling unit includes a low-pressure hydrogenation machine and a high-pressure hydrogenation machine that are respectively communicated with the high-pressure hydrogen storage tank, the medium-pressure hydrogen storage tank and the low-pressure hydrogen storage tank.
10. A hydrogen refueling station comprising a hydrogen filling system according to any one of claims 1 to 9.
CN202110073351.5A 2021-01-20 2021-01-20 Hydrogen filling system and hydrogenation station Pending CN113007596A (en)

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CN113586948A (en) * 2021-07-20 2021-11-02 上海氢枫能源技术有限公司 Optimization control method for efficient hydrogenation of hydrogenation station
CN114484268A (en) * 2022-02-23 2022-05-13 西南化工研究设计院有限公司 Hydrogen compression filling pipe bundle vehicle system and filling method thereof

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CN113586948A (en) * 2021-07-20 2021-11-02 上海氢枫能源技术有限公司 Optimization control method for efficient hydrogenation of hydrogenation station
CN114484268A (en) * 2022-02-23 2022-05-13 西南化工研究设计院有限公司 Hydrogen compression filling pipe bundle vehicle system and filling method thereof

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