CN111365610A - Discharging pressure regulating system applied to hydrogen storage type hydrogen adding station - Google Patents

Discharging pressure regulating system applied to hydrogen storage type hydrogen adding station Download PDF

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Publication number
CN111365610A
CN111365610A CN202010249512.7A CN202010249512A CN111365610A CN 111365610 A CN111365610 A CN 111365610A CN 202010249512 A CN202010249512 A CN 202010249512A CN 111365610 A CN111365610 A CN 111365610A
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China
Prior art keywords
liquid hydrogen
hydrogen
valve
pipeline
liquid
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Granted
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CN202010249512.7A
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CN111365610B (en
Inventor
苏红艳
魏蔚
况开锋
何春辉
陈甲楠
赵亚丽
施海涛
杜海滨
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Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd
Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
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Jiangsu Guofu Hydrogen Energy Technology Equipment Co Ltd
Zhangjiagang Hydrogen Cloud New Energy Research Institute Co Ltd
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Publication of CN111365610A publication Critical patent/CN111365610A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • 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
    • 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
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/14—Conveying liquids or viscous products by pumping
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/0126—One vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F17C2205/0355—Insulation thereof
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    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/013—Single phase liquid
    • 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
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/0192—Propulsion of the fluid by using a working fluid
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/039—Localisation of heat exchange separate on the pipes
    • 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
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/043—Methods for emptying or filling by pressure cascade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/036—Control means using alarms
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/025—Reducing transfer time
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • 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
    • F17C2265/063—Fluid distribution for supply of refueling stations
    • 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
    • F17C2265/068—Distribution pipeline networks
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a discharging pressure regulating system applied to a hydrogen storage type hydrogen adding station, which comprises: the three unloading modes of the immersed pump unloading, the self-pressurization unloading and the combined unloading of the booster and the immersed pump are realized, and the two pressure regulating modes of the self-pressurization pressure regulation and the combined pressure regulation of the booster and the immersed pump are realized. The discharging pressure regulating system shares one supercharger, and the discharging and pressure regulating processes of the liquid hydrogen tank truck and the fixed liquid hydrogen storage tank set are realized through the arrangement of a plurality of liquid hydrogen pipelines and a plurality of hydrogen pipelines and the control of each valve, so that the discharging and pressure regulating system is compact in layout, simple in process, convenient to operate and safe and reliable to use.

Description

Discharging pressure regulating system applied to hydrogen storage type hydrogen adding station
Technical Field
The invention relates to the technical field of new hydrogen energy, in particular to a discharging pressure regulating system applied to a hydrogen storage type hydrogen station.
Background
As one of the most promising clean energy resources in the world, hydrogen energy is considered as an "ultimate new energy automobile solution" by many countries. The hydrogen station is on the fuel cell automobile, just like the gas station is on the traditional fuel automobile, fills electric pile and is on pure electric vehicles, is the essential cornerstone that supports the fuel cell automobile industry development.
The global hydrogen energy and fuel cell market is still in the market import stage, the hydrogen station on the market at present is a high-pressure gas hydrogen storage hydrogen adding station, the hydrogen reserve source of the high-pressure gas hydrogen storage hydrogen adding station is transported to the high-pressure gas hydrogen storage hydrogen adding station by a high-pressure hydrogen transport vehicle (the high-pressure hydrogen transport vehicle mainly adopts a long-tube trailer, and the long-tube trailer can transport 250-460 kg hydrogen/vehicle every time), and then the high-pressure hydrogen in the high-pressure hydrogen transport vehicle is transported to the hydrogen storage container in the high-pressure gas hydrogen storage hydrogen adding station for caching by utilizing the pressurization of a hydrogen compressor. When filling, the high-pressure hydrogen in the hydrogen storage container is regulated by the heat exchanger and then is conveyed to the hydrogenation machine for filling.
The filling quantity supply scale of the high-pressure hydrogen storage hydrogen station is 100-500 kg/d, and the maximum filling quantity supply scale can reach 1000 kg/d. However, even the daily filling amount is 1000 kg/d at most, the filling of 25 buses or 100 passenger vehicles at most can be realized in a single day. According to the policy planning of China, the national market can realize the reserve of 5-10 ten thousand hydrogen fuel cell vehicles by 2025 years, if no corresponding liquid hydrogen industrial chain and corresponding infrastructure construction exist, the existing high-pressure gas hydrogen storage hydrogen filling station is relied on, the market scale requirement of the hydrogen fuel cell vehicle in the future cannot be met, and the hydrogen fuel becomes a key factor for restricting the development of the fuel cell vehicle; therefore, there is a need to improve the liquid hydrogen industry chain and the corresponding infrastructure construction to meet the future demand of hydrogen fuel cell automobile market scale.
Disclosure of Invention
The hydrogenation scale of the hydrogenation station is the same, compared with the high-pressure gas hydrogen storage hydrogen station, the liquid hydrogen storage type hydrogen station is adopted to store liquid hydrogen, the occupied area of the liquid hydrogen storage type hydrogen station is reduced by 30% or more than that of the high-pressure gas hydrogen storage hydrogen station, and the construction cost of the liquid hydrogen storage type hydrogen station is reduced by 16% or more than that of the high-pressure gas hydrogen storage hydrogen station.
The technical problems to be solved by the invention are as follows: the unloading pressure regulating system can select one of three unloading modes of submerged pump unloading, self-pressurization unloading and booster and submerged pump combined unloading according to actual requirements, and safely and reliably unload the liquid hydrogen conveyed by the liquid hydrogen tank truck to a fixed liquid hydrogen storage tank in the hydrogen storage type hydrogenation station. In addition, the purpose of pressurization in the fixed liquid hydrogen storage tank can be achieved through one of two pressure regulating modes of self-pressurization pressure regulation and pressure regulation of a supercharger and an immersed pump in a combined mode.
In order to solve the problems, the invention adopts the technical scheme that: the discharging pressure regulating system applied to the hydrogen storage type hydrogen filling station comprises: the system comprises a fixed liquid hydrogen storage tank group consisting of at least one fixed liquid hydrogen storage tank, a submerged pump pool, a supercharger, a four-way valve, a plurality of liquid hydrogen pipelines, a plurality of hydrogen pipelines and a plurality of valves, wherein the fixed liquid hydrogen storage tank group is provided with five connecting ports, namely a total liquid inlet b, a total liquid outlet a, a first total gas port c, a second total gas port d and a third total gas port e; the immersed pump pool is provided with three connectors, namely a pump pool liquid inlet, an immersed pump liquid outlet and a pump pool gas outlet; the supercharger is provided with a first connecting port, a second connecting port and a third connecting port; the four-way valve is provided with four connecting ports, namely an f port, a g port, a j port and an i port.
The plurality of liquid hydrogen pipelines comprises: a first liquid hydrogen pipeline, a second liquid hydrogen pipeline, a third liquid hydrogen pipeline, a fourth liquid hydrogen pipeline, a fifth liquid hydrogen pipeline, a first liquid hydrogen branch pipeline, a second liquid hydrogen branch pipeline, a third liquid hydrogen branch pipeline, a fourth liquid hydrogen branch pipeline, a fifth liquid hydrogen branch pipeline, a sixth liquid hydrogen branch pipeline, a seventh liquid hydrogen branch pipeline, an eighth liquid hydrogen branch pipeline and a ninth liquid hydrogen branch pipeline; the plurality of hydrogen gas conduits include: a first hydrogen gas conduit, a second hydrogen gas conduit, a third hydrogen gas conduit, and a fourth hydrogen gas conduit; the plurality of valves includes: the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, the eleventh valve and the twelfth valve.
One end of the first liquid hydrogen pipeline is fixedly provided with an unloading port joint which can be in sealed butt joint with an unloading port of the liquid hydrogen tank wagon, and the other end of the first liquid hydrogen pipeline is in sealed communication with a pump pond liquid inlet of the submerged pump pond; on first liquid hydrogen pipeline, by the mouth joint end of unloading to the other end interval be provided with first valve and second valve in proper order, be provided with two lateral conduits on the first liquid hydrogen pipeline between the pump pond inlet of second valve and submerged pump pond: the first liquid hydrogen branch pipeline is communicated with an f port of the four-way valve in a sealing mode, and the second liquid hydrogen branch pipeline is connected with an air inlet of the high-pressure hydrogen filling system.
One end of the second liquid hydrogen pipeline is hermetically communicated with a liquid outlet of an immersed pump of the immersed pump pool, and the other end of the second liquid hydrogen pipeline forms two branches: the third liquid hydrogen branch pipeline is communicated with the g port of the four-way valve in a sealing mode, and the fourth liquid hydrogen branch pipeline is connected with the inlet of the liquid hydrogen filling system.
One end of the third liquid hydrogen pipeline is connected to the first through hole on the side wall of the first liquid hydrogen pipeline between the first valve and the second valve in a sealing way, and the other end of the third liquid hydrogen pipeline forms a two-way branch: the fifth liquid hydrogen branch pipeline is hermetically communicated with a total liquid inlet b of the fixed liquid hydrogen storage tank group, the sixth liquid hydrogen branch pipeline is hermetically communicated with a first total gas port c of the fixed liquid hydrogen storage tank group, and a twelfth valve is arranged on the sixth liquid hydrogen branch pipeline; and a third valve and a fourth valve are sequentially arranged on the third liquid hydrogen pipeline from the end connected with the first through hole on the side wall of the first liquid hydrogen pipeline to the other end at intervals, a seventh liquid hydrogen branch pipeline is arranged on the third liquid hydrogen pipeline between the third valve and the fourth valve, and the seventh liquid hydrogen branch pipeline is communicated with the i port of the four-way valve in a sealing way.
The pressurizing port joint which can be in sealed butt joint with the pressurizing port of the liquid hydrogen tank car is fixedly arranged at one end of the fourth liquid hydrogen pipeline, and the other end of the fourth liquid hydrogen pipeline forms two branches: the eighth liquid hydrogen branch pipeline is hermetically communicated with a first connecting port of the supercharger, and the ninth liquid hydrogen branch pipeline is hermetically connected to a second through hole in the side wall of the third liquid hydrogen pipeline between the third valve and the fourth valve; a fifth valve is arranged on the fourth liquid hydrogen pipeline, a sixth valve is arranged on the eighth liquid hydrogen branch pipeline, and a seventh valve is arranged on the ninth liquid hydrogen branch pipeline.
One end of a fifth liquid hydrogen pipeline is in sealed communication with a general liquid outlet a of the fixed liquid hydrogen storage tank group, the other end of the fifth liquid hydrogen pipeline is in sealed communication with a j port of the four-way valve, and an eighth valve is arranged on the fifth liquid hydrogen pipeline.
The gas phase port joint which can be in sealed butt joint with the gas phase port of the liquid hydrogen tank car is fixedly arranged at one end of the first hydrogen pipeline, the other end of the first hydrogen pipeline is in sealed communication with the third connecting port of the supercharger, and the first hydrogen pipeline is provided with a ninth valve.
One end of the second hydrogen pipeline is communicated with the second connecting port of the supercharger in a sealing mode, the other end of the second hydrogen pipeline is connected to a third through hole in the side wall of the sixth liquid hydrogen branch pipeline between the twelfth valve and the first main gas port c in a sealing mode, and a tenth valve is arranged on the second hydrogen pipeline.
One end of the third hydrogen pipeline is hermetically communicated with a pump pool air outlet of the submerged pump pool, and the other end of the third hydrogen pipeline is hermetically communicated with a third total gas port e of the fixed liquid hydrogen storage tank group.
One end of a fourth hydrogen pipeline is communicated with a second total gas port d of the fixed liquid hydrogen storage tank group in a sealing mode, the other end of the fourth hydrogen pipeline is communicated with a gas inlet of a gas recovery system, and an eleventh valve is arranged on the fourth hydrogen pipeline.
Further, the discharging pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that each liquid hydrogen pipeline and each hydrogen pipeline are respectively provided with a safety valve bank, a temperature sensor and a pressure sensor, wherein the safety valve bank is composed of an overpressure safety discharge port and a safety valve, and the discharge ports of the safety valve bank are communicated with an air inlet of a gas recovery system.
Further, the discharging pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that each safety valve bank, each temperature sensor and each pressure sensor are connected with a control system with an alarm device; when the pressure in any liquid hydrogen pipeline or any hydrogen pipeline exceeds the set pressure of the control system, the control system starts the alarm device and starts the safety valve group on the corresponding liquid hydrogen pipeline to release the pressure.
Further, the discharging pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that each valve is an electric regulating valve or a pneumatic regulating valve, and each valve is connected with the control system; when unloading, the control system controls each valve, thereby realizing one of three unloading modes of unloading of the immersed pump, self-pressurization unloading and combined unloading of the supercharger and the immersed pump; when each fixed liquid hydrogen storage tank is pressurized, the control system can control each valve according to the pressure value and the temperature value in each liquid hydrogen pipeline and each hydrogen pipeline, so that one of two pressure regulating modes of self-pressurization pressure regulation and pressure regulation by combining a supercharger and an immersed pump is realized.
Further, the discharge pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that the supercharger is a spiral fin tube type air heat exchanger.
Further, the discharging pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that the fixed liquid hydrogen storage tank is a vacuum heat insulation storage tank, the vacuum heat insulation storage tank is one of a vertical storage tank and a horizontal storage tank, and the vacuum heat insulation storage tank is one of an overground storage tank and a buried storage tank; when the number of the fixed liquid hydrogen storage tanks is two or more, the fixed liquid hydrogen storage tanks are arranged in parallel, each fixed liquid hydrogen storage tank is provided with five connecting ports, namely a liquid inlet, a liquid outlet, a first gas port, a second gas port and a third gas port, the liquid inlets of the fixed liquid hydrogen storage tanks are connected in parallel to form a total liquid inlet b, the liquid outlets of the fixed liquid hydrogen storage tanks are connected in parallel to form a total liquid outlet a, the first gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a first total gas port c, the second gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a second total gas port d, and the third gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a third total gas port e.
Further, the discharge pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that each liquid hydrogen pipeline is a vacuum jacket heat-insulating pipe, each vacuum jacket heat-insulating pipe is composed of an inner pipe and an outer pipe which are coaxial, and a vacuumizing interlayer is arranged between the inner pipe and the outer pipe.
Further, the discharging pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that the gas recovery system is a BOG recycling system or an EAG safe discharge system.
Further, the unloading pressure regulating system applied to the hydrogen storage type hydrogen filling station is characterized in that the unloading port connector and the pressurizing port connector are both connectors formed by a liquid hydrogen breaking valve and a liquid hydrogen hose; the gas phase port joint is a joint formed by a hydrogen breaking valve and a hydrogen hose.
The invention has the beneficial effects that: the unloading and pressure regulating system shares one supercharger, and the unloading and pressure regulating processes of the liquid hydrogen tank truck and the fixed liquid hydrogen storage tank set are realized through the arrangement of a plurality of liquid hydrogen pipelines and a plurality of hydrogen pipelines and the control of valves. When the liquid hydrogen tank car unloads, one of three unloading modes of submerged pump unloading, self-pressurization unloading and combined unloading of a supercharger and the submerged pump can be realized by controlling each valve, so that the liquid hydrogen transported by the liquid hydrogen tank car is safely and reliably unloaded to a fixed liquid hydrogen storage tank group in the hydrogen storage type hydrogen filling station. The fixed liquid hydrogen storage tank group can realize one of two pressure regulating modes of self-pressurization and pressure regulation and combined pressure regulation of a supercharger and an immersed pump by controlling each valve during pressure regulation, and realize the purpose of pressurization in each fixed liquid hydrogen storage tank, thereby ensuring that liquid hydrogen in the fixed liquid hydrogen storage tank can be conveyed to a subsequent liquid hydrogen filling system or a high-pressure hydrogen filling system, and simultaneously ensuring that liquid hydrogen output to the liquid hydrogen hydrogenation system or the high-pressure hydrogen hydrogenation system from the fixed liquid hydrogen storage tank group is saturated liquid hydrogen, and reducing the generation of BOG (liquid hydrogen flash evaporation hydrogen gas BOG for short) gas in a hydrogen conveying pipeline. Compact layout, simple flow, convenient operation and safe and reliable use.
Drawings
Fig. 1 is a schematic process flow diagram of a discharge pressure regulating system applied to a hydrogen storage type hydrogen filling station according to the present invention.
Fig. 2 is an enlarged schematic view of a portion of fig. 1.
Fig. 3 is an enlarged schematic view of a portion of fig. 1.
Fig. 4 is an enlarged schematic view of a portion of fig. 1.
Fig. 5 is a flow chart of a self-pressurizing unloading vehicle.
FIG. 6 is a flow chart of the submersible pump unloading.
FIG. 7 is a flow chart of the combined unloading of the booster and the immersed pump.
FIG. 8 is a flow chart of combined pressure regulation of the intensifier and immersed pump.
Fig. 9 is a flow chart of self-boost pressure regulation.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the discharge pressure regulating system applied to the hydrogen storage type hydrogen refueling station according to the present invention includes: the system comprises a fixed liquid hydrogen storage tank group 1 consisting of at least one fixed liquid hydrogen storage tank, an immersed pump pool 2 with an immersed pump, a supercharger 3, a four-way valve 4, a plurality of liquid hydrogen pipelines, a plurality of hydrogen pipelines and a plurality of valves.
Referring to fig. 3, the fixed liquid hydrogen storage tank group 1 has five connection ports, i.e., a total liquid inlet b, a total liquid outlet a, a first total gas port c, a second total gas port d and a third total gas port e. The fixed liquid hydrogen storage tank in the embodiment is a vacuum heat insulation storage tank, the vacuum heat insulation storage tank is one of a vertical storage tank and a horizontal storage tank, and the vacuum heat insulation storage tank is one of an overground storage tank and a buried storage tank. When the number of the fixed liquid hydrogen storage tanks is two or more, the fixed liquid hydrogen storage tanks are arranged in parallel, each fixed liquid hydrogen storage tank is provided with five connecting ports, namely a liquid inlet, a liquid outlet, a first gas port, a second gas port and a third gas port, the liquid inlets of the fixed liquid hydrogen storage tanks are connected in parallel to form a total liquid inlet b, the liquid outlets of the fixed liquid hydrogen storage tanks are connected in parallel to form a total liquid outlet a, the first gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a first total gas port c, the second gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a second total gas port d, and the third gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a third total gas port e. The present embodiment is illustrated by taking the number of the fixed liquid hydrogen tanks as an example.
As shown in fig. 4, the immersed pump pool 2 has three connectors, namely a pump pool inlet 21, an immersed pump outlet 22 and a pump pool outlet 23. The four-way valve 4 is provided with four connecting ports of an f port, a g port, a j port and an i port. As shown in fig. 2, the supercharger 3 includes three connection ports, i.e., a first connection port 31, a second connection port 32, and a third connection port 33. The supercharger 3 described in this embodiment adopts a spiral fin-tube type air heat exchanger to increase the contact area with the ambient air, and uses the ambient air to heat the liquid hydrogen in the fin tubes to gasify the liquid hydrogen, so that the pressure of the liquid hydrogen tank car 100 or the fixed liquid hydrogen storage tank group 1 is adjusted by using the hydrogen to ensure the normal operation of the system.
As shown in fig. 1, the plurality of liquid hydrogen pipes includes: a first liquid hydrogen pipe 51, a second liquid hydrogen pipe 52, a third liquid hydrogen pipe 53, a fourth liquid hydrogen pipe 54, a fifth liquid hydrogen pipe 55, a first liquid hydrogen branch pipe 511, a second liquid hydrogen branch pipe 512, a third liquid hydrogen branch pipe 521, a fourth liquid hydrogen branch pipe 522, a fifth liquid hydrogen branch pipe 531, a sixth liquid hydrogen branch pipe 532, a seventh liquid hydrogen branch pipe 533, an eighth liquid hydrogen branch pipe 541, and a ninth liquid hydrogen branch pipe 542. In order to ensure that each liquid hydrogen pipeline has good heat insulation performance and avoid heat absorption and gasification of the liquid hydrogen as much as possible, the liquid hydrogen pipeline in the embodiment adopts a vacuum jacket heat insulation pipe, the vacuum jacket heat insulation pipe is composed of an inner pipe and an outer pipe which are coaxial, and a vacuumizing interlayer is arranged between the inner pipe and the outer pipe.
The plurality of hydrogen gas conduits include: a first hydrogen line 56, a second hydrogen line 57, a third hydrogen line 58, and a fourth hydrogen line 59. The plurality of valves includes: the first valve 71, the second valve 72, the third valve 73, the fourth valve 74, the fifth valve 75, the sixth valve 76, the seventh valve 77, the eighth valve 78, the ninth valve 79, the tenth valve 710, the eleventh valve 711, and the twelfth valve 712.
As shown in fig. 1, 2 and 4, an unloading port joint 61 capable of being in sealed butt joint with a discharge port of the liquid hydrogen tanker 100 is fixedly arranged at one end of the first liquid hydrogen pipeline 51, and the other end of the first liquid hydrogen pipeline 51 is in sealed communication with a pump pool liquid inlet 21 of the submerged pump pool 2. The unloading port joint 61 adopts a joint formed by a liquid hydrogen breaking valve and a liquid hydrogen hose, and the liquid hydrogen breaking valve belongs to a relatively mature valve element in a liquid hydrogen industrial chain. A first valve 71 and a second valve 72 are sequentially arranged on the first liquid hydrogen pipeline 51 from the end of the unloading port connector 61 to the other end at intervals, and two branch pipelines are arranged on the first liquid hydrogen pipeline 51 between the second valve 72 and the pump tank liquid inlet 21 of the immersed pump tank 2: a first liquid hydrogen branch pipe 511 and a second liquid hydrogen branch pipe 512, wherein the first liquid hydrogen branch pipe 511 is hermetically communicated with an f port of the four-way valve 4, and the second liquid hydrogen branch pipe 512 is connected with an air inlet of the high-pressure hydrogen gas filling system.
As shown in fig. 1 and 4, one end of the second liquid hydrogen pipe 52 is in sealed communication with the immersed pump outlet 22 of the immersed pump pool 2, and the other end of the second liquid hydrogen pipe 52 forms two branches: a third liquid hydrogen branch pipe 521 and a fourth liquid hydrogen branch pipe 522, wherein the third liquid hydrogen branch pipe 521 is in sealed communication with the g port of the four-way valve 4, and the fourth liquid hydrogen branch pipe 522 is connected with the inlet of the liquid hydrogen filling system.
As shown in fig. 1, 2 and 3, one end of the third liquid hydrogen pipe 53 is connected to the first through hole 510 of the sidewall of the first liquid hydrogen pipe between the first valve 71 and the second valve 72 in a sealing manner, and the other end of the third liquid hydrogen pipe 53 forms a two-way branch: a fifth liquid hydrogen branch pipeline 531 and a sixth liquid hydrogen branch pipeline 532, wherein the fifth liquid hydrogen branch pipeline 531 is hermetically communicated with a total liquid inlet b of the fixed liquid hydrogen storage tank group 1, and the sixth liquid hydrogen branch pipeline 532 is hermetically communicated with a first total gas port c of the fixed liquid hydrogen storage tank group 1. A twelfth valve 712 is provided in the sixth liquid hydrogen branch pipe 532. A third valve 73 and a fourth valve 74 are sequentially arranged on the third liquid hydrogen pipe 53 at an interval from the end connected to the first through hole 510 of the side wall of the first liquid hydrogen pipe to the other end, a seventh liquid hydrogen branch pipe 533 is arranged on the third liquid hydrogen pipe 53 between the third valve 73 and the fourth valve 74, and the seventh liquid hydrogen branch pipe 533 is in sealed communication with the i-port of the four-way valve 4.
As shown in fig. 1 and 2, a pressurizing port joint 62 capable of being in sealed butt joint with a pressurizing port of the liquid hydrogen tanker 100 is fixedly arranged at one end of the fourth liquid hydrogen pipeline 54, and the other end of the fourth liquid hydrogen pipeline 54 forms a two-way branch: an eighth liquid hydrogen branch pipe 541 and a ninth liquid hydrogen branch pipe 542, wherein the eighth liquid hydrogen branch pipe 541 is in sealed communication with the first connection port 31 of the supercharger 3, and the ninth liquid hydrogen branch pipe 542 is in sealed connection with the second through hole 530 on the side wall of the third liquid hydrogen pipe between the third valve 73 and the fourth valve 74. The fourth liquid hydrogen pipe 54 is provided with a fifth valve 75, the eighth liquid hydrogen branch pipe 541 is provided with a sixth valve 76, and the ninth liquid hydrogen branch pipe 542 is provided with a seventh valve 77. The pressurizing port joint 62 is a joint formed by a liquid hydrogen breaking valve and a liquid hydrogen hose.
As shown in fig. 1 and 3, one end of a fifth liquid hydrogen pipeline 55 is in sealed communication with a main liquid outlet a of the fixed liquid hydrogen storage tank group 1, the other end of the fifth liquid hydrogen pipeline 55 is in sealed communication with a j-port of the four-way valve 4, and an eighth valve 78 is disposed on the fifth liquid hydrogen pipeline 55.
As shown in fig. 1 and 2, a gas phase port joint 63 capable of being in sealed butt joint with a gas phase port of the liquid hydrogen tanker 100 is fixedly provided at one end of the first hydrogen pipe 56, the other end of the first hydrogen pipe 56 is in sealed communication with the third connection port 33 of the supercharger 3, and a ninth valve 79 is provided on the first hydrogen pipe 56. The gas phase port joint 63 is a joint formed by a hydrogen breaking valve and a hydrogen hose.
As shown in fig. 1, 2 and 3, one end of the second hydrogen pipe 57 is in sealed communication with the second connection port 32 of the supercharger 3, the other end of the second hydrogen pipe 57 is in sealed connection with the third through hole 534 of the side wall of the sixth liquid hydrogen branch pipe between the twelfth valve 712 and the first total gas port c, and the tenth valve 710 is provided in the second hydrogen pipe 57.
As shown in fig. 1, 3 and 4, one end of the third hydrogen pipeline 58 is in sealed communication with the pump pool air outlet 23 of the immersed pump pool 2, and the other end of the third hydrogen pipeline 58 is in sealed communication with the third main air port e of the fixed liquid hydrogen storage tank group 1.
As shown in fig. 1 and 3, one end of the fourth hydrogen pipeline 59 is in sealed communication with the second total gas port d of the fixed liquid hydrogen storage tank group 1, the other end of the fourth hydrogen pipeline 59 is in communication with a gas inlet of the gas recovery system, and an eleventh valve 711 is disposed on the fourth hydrogen pipeline 59. In this embodiment, the gas recycling system may be a BOG recycling system or an EAG safe discharge system. The BOG recycling system or the EAG safe discharge system belongs to a mature gas recycling system in a hydrogen energy industrial chain, the recycling system is used for collecting gas discharged by pressure relief in the system, and the structure and pipeline distribution of the specific BOG recycling system or the EAG safe discharge system are not improved and innovated, so that the specific BOG recycling system or the EAG safe discharge system are not expanded and repeated in the invention.
And each liquid hydrogen pipeline and each hydrogen pipeline are respectively provided with a safety valve bank consisting of an overpressure safety release port and a safety valve, and detection instruments such as a temperature sensor, a pressure sensor and the like, and the release ports of the safety valve bank are communicated with an air inlet of a gas recovery system. Each safety valve group, each temperature sensor and each pressure sensor are connected with a control system with an alarm device; when the pressure in any liquid hydrogen pipeline or any hydrogen pipeline exceeds the set pressure of the control system, the control system starts the alarm device and starts the safety valve group on the corresponding liquid hydrogen pipeline to release the pressure.
Each valve can adopt an electric regulating valve or a pneumatic regulating valve and is respectively connected with a control system; when unloading, the control system can control each valve, thereby realizing one of three unloading modes of unloading of the immersed pump, self-pressurization unloading and combined unloading of the supercharger and the immersed pump; when each fixed liquid hydrogen storage tank is pressurized, the control system can control each valve according to the pressure value and the temperature value in each liquid hydrogen pipeline and each hydrogen pipeline, so that one of two pressure regulating modes of self-pressurization pressure regulation and pressure regulation by combining a supercharger and an immersed pump is realized. The electrical equipment and the instrument equipment adopt explosion-proof electrical equipment and instrument equipment suitable for liquid hydrogen. Flow meters may be optionally provided in the respective liquid hydrogen pipes and the respective hydrogen pipes, and as shown in fig. 2, a flow meter may be provided in the first liquid hydrogen pipe 51.
After the liquid hydrogen tanker 100 is transported to the hydrogen storage type hydrogen filling station, the discharge opening of the liquid hydrogen tanker 100 is in sealed butt joint with the unloading opening joint 61, the pressurization opening of the liquid hydrogen tanker 100 is in sealed butt joint with the pressurization opening joint 62, and the gas phase opening of the liquid hydrogen tanker 100 is in sealed butt joint with the gas phase opening joint 63.
When the indoor temperature is higher, the unloading is preferably carried out by adopting a self-pressurization unloading mode. When the self-pressurization unloading mode is adopted for unloading, as shown in fig. 5, the first valve 71, the third valve 73, the fourth valve 74, the fifth valve 75, the sixth valve 76, the ninth valve 79 and the twelfth valve 712 are opened, and the second valve 72, the seventh valve 77, the eighth valve 78, the tenth valve 710 and the eleventh valve 711 are closed.
The liquid hydrogen in the liquid hydrogen tank car 100 flows into the supercharger 3 through the supercharging port, the supercharging port joint 62, the fourth liquid hydrogen pipeline 54, the eighth liquid hydrogen branch pipeline 541 and the first connecting port 31 of the supercharger 3, and returns to the upper part of the liquid hydrogen tank car 100 through the third connecting port 33 of the supercharger 3, the first hydrogen pipeline 56, the gas phase port joint 63 and the gas phase port of the liquid hydrogen tank car 100 after being heated and gasified by ambient air so as to increase the internal pressure of the liquid hydrogen tank car. Then liquid hydrogen in the liquid hydrogen tank wagon utilizes the pressure difference between the liquid hydrogen tank wagon and the fixed liquid hydrogen storage tank group 1, and is shunted after passing through the discharge opening of the liquid hydrogen tank wagon 100, the unloading opening joint 61, the first liquid hydrogen pipeline 51 and the third liquid hydrogen pipeline 53: liquid hydrogen is branched through the fifth liquid hydrogen
The pipeline 531 and the total liquid inlet b of the fixed liquid hydrogen storage tank group 1 flow into each fixed liquid hydrogen storage tank for storage, and gasified gas in the liquid hydrogen enters the upper gas phase space of each fixed liquid hydrogen storage tank through the sixth liquid hydrogen branch pipeline 532 and the first total gas port c of the fixed liquid hydrogen storage tank group 1. And realizing quick unloading. With the increase of the liquid in the fixed liquid hydrogen storage tank, the gas phase pressure in the fixed liquid hydrogen storage tank becomes higher, and when the pressure exceeds the design pressure, the eleventh valve 711 needs to be opened to release the pressure. The self-pressurization unloading mode has the advantage of no energy consumption.
When the indoor temperature is lower, two modes of unloading by the immersed pump and unloading by combining the supercharger and the immersed pump are adopted, and the unloading speed of the supercharger and the immersed pump is higher and the time consumption is less than that of the unloading by the immersed pump.
When the immersed pump unloading mode is adopted for unloading, whether the immersed pump in the immersed pump pool 2 is in a standby state or not is firstly confirmed, and if the immersed pump is not in the standby state, precooling is needed in advance to ensure that the immersed pump 20 can normally work. After confirming that the immersed pump 20 can normally operate, as shown in fig. 6, the first valve 71, the second valve 72, the fourth valve 74, the ninth valve 79 and the tenth valve 710 are opened, the port i of the four-way valve is communicated with the port g, the port j of the four-way valve is disconnected from the port f of the four-way valve, and the third valve 73, the fifth valve 75, the sixth valve 76, the seventh valve 77, the eighth valve 78, the eleventh valve 711 and the twelfth valve 712 are closed.
Liquid hydrogen in the liquid hydrogen tank wagon 100 flows into the immersed pump pool 2 through a discharge opening of the liquid hydrogen tank wagon 100, an unloading opening joint 61, a first liquid hydrogen pipeline 51 and a pump pool liquid inlet 21 of the immersed pump pool 2 by utilizing the pressure difference between the liquid hydrogen tank wagon and the immersed pump pool, the liquid hydrogen is pumped out from an immersed pump liquid outlet 22 of the immersed pump pool 2 through the immersed pump 20, and the pumped liquid hydrogen flows into each fixed liquid hydrogen storage tank for storage through a second liquid hydrogen pipeline 52, a four-way valve 4, a seventh liquid hydrogen branch pipeline 533, a third liquid hydrogen pipeline 53, a fifth liquid hydrogen branch pipeline 531 and a total liquid inlet b of the fixed liquid hydrogen storage tank group 1. Along with the increase of the liquid in the fixed liquid hydrogen storage tank, the gas phase pressure in the fixed liquid hydrogen storage tank is increased, the hydrogen in the fixed liquid hydrogen storage tank flows into the supercharger 3 through the first total gas port c, the sixth liquid hydrogen branch pipeline 532, the second hydrogen pipeline 57 and the second connecting port 32 of the fixed liquid hydrogen storage tank group 1, and returns to the upper part of the liquid hydrogen tank wagon 100 through the third connecting port 33 of the supercharger 3, the first hydrogen pipeline 56, the gas phase port joint 63 and the gas phase port of the liquid hydrogen tank wagon 100 after being heated and gasified by ambient air, so as to increase the internal pressure of the liquid hydrogen tank wagon. The problem of the gaseous phase pressure reduction that liquid hydrogen tank wagon caused because of the liquid phase reduces has been solved on the one hand like this, and the fixed liquid hydrogen storage tank causes gaseous phase pressure to rise because of the liquid increases on the other hand. Therefore, the fixed liquid hydrogen storage tank does not need to be decompressed in the whole unloading process. The submerged pump unloading mode has the advantages that the fixed liquid hydrogen storage tank is not required to be decompressed, and liquid hydrogen is not consumed.
When the booster and the immersed pump are used for unloading in a combined unloading mode, whether the immersed pump in the immersed pump pool 2 is in a standby state or not is firstly confirmed, and if the immersed pump is not in the standby state, precooling is needed in advance to ensure that the immersed pump 20 can normally work. After confirming that the immersed pump 20 is normally operated, as shown in fig. 7, the first valve 71, the second valve 72, the fourth valve 74, and the twelfth valve 712 are opened, the port i of the four-way valve 4 is not communicated with the port g, and the port j and the port f are not communicated, and the third valve 73, the fifth valve 75, the sixth valve 76, the ninth valve 79, the seventh valve 77, the eighth valve 78, the ninth valve 79, the tenth valve 710, and the eleventh valve 711 are closed.
Liquid hydrogen in the liquid hydrogen tank car 100 flows into the immersed pump pool 2 through a discharge opening of the liquid hydrogen tank car 100, an unloading opening joint 61, a first liquid hydrogen pipeline 51 and a pump pool inlet 21 of the immersed pump pool 2 by utilizing the pressure difference between the liquid hydrogen tank car and the immersed pump pool 2, the liquid hydrogen is pumped out from an immersed pump outlet 22 of the immersed pump pool 2 through an immersed pump 20, and the pumped liquid hydrogen is shunted after passing through a second liquid hydrogen pipeline 52, a third liquid hydrogen branch pipeline 521, a seventh liquid hydrogen branch pipeline 533 and a third liquid hydrogen pipeline 53: the liquid hydrogen flows into each fixed liquid hydrogen storage tank for storage through the fifth liquid hydrogen branch pipeline 531 and the total liquid inlet b of the fixed liquid hydrogen storage tank group 1, and the gasified gas in the liquid hydrogen flows into the upper gas phase space of each fixed liquid hydrogen storage tank through the sixth liquid hydrogen branch pipeline 532 and the first total gas inlet c of the fixed liquid hydrogen storage tank group 1.
As the liquid hydrogen in the liquid hydrogen tank car 100 becomes less and less, the gas phase pressure in the liquid hydrogen tank car 100 also becomes smaller, and when the pressure of the liquid hydrogen tank car 100 and the immersed pump tank 2 is smaller than a set value, the fifth valve 75, the sixth valve 76, and the ninth valve 79 are opened. A part of the liquid hydrogen in the liquid hydrogen tank car 100 flows into the supercharger 3 through the supercharging port, the supercharging port joint 62, the fourth liquid hydrogen pipeline 54, the eighth liquid hydrogen branch pipeline 541 and the first connecting port 31 of the supercharger 3, and returns to the upper part of the liquid hydrogen tank car 100 through the third connecting port 33 of the supercharger 3, the first hydrogen pipeline 56, the gas phase port joint 63 and the gas phase port of the liquid hydrogen tank car 100 after being heated and gasified by ambient air, so as to increase the internal pressure of the liquid hydrogen tank car and maintain the gas phase pressure of the liquid hydrogen tank car.
Meanwhile, along with the increase of liquid in the fixed liquid hydrogen storage tank, the gas phase pressure in the fixed liquid hydrogen storage tank is increased, and in order to ensure the safety use performance of the fixed liquid hydrogen storage tank set 1, the eleventh valve 711 is required to be opened for pressure relief when the pressure exceeds the design pressure. The unloading mode combining the booster and the immersed pump has the advantages of high boosting speed and high unloading speed of the liquid hydrogen tank car.
When the hydrogen storage type hydrogen filling station normally works, the j port and the f port of the four-way valve are communicated, liquid hydrogen in the fixed liquid hydrogen storage tank flows into the submerged pump pool through the four-way valve 4 under the action of pressure difference and then flows into the liquid hydrogen filling system, or liquid hydrogen in the fixed liquid hydrogen storage tank flows into the high-pressure hydrogen filling system through the four-way valve 4 under the action of pressure difference. Along with the reduction of liquid in the fixed liquid hydrogen storage tank, the gas phase pressure in the fixed liquid hydrogen storage tank becomes small, when the gas phase pressure in the fixed liquid hydrogen storage tank is less than or equal to the external pressure, the liquid hydrogen cannot be output, and the pressure is required to be adjusted according to the situation.
When the system is in the power-off working condition, the pressure is regulated by adopting a self-pressurization pressure regulating mode. As shown in fig. 9, the sixth valve 76, the seventh valve 77, the eighth valve 78, and the tenth valve 710 are opened to communicate the i port and the j port of the four-way valve 4, and the first valve 71, the second valve 72, the third valve 73, the fourth valve 74, the fifth valve 75, the ninth valve 79, the eleventh valve 711, and the twelfth valve 712 are closed.
Under the action of pressure difference, liquid hydrogen flows into the supercharger 3 from the total liquid outlet a of the fixed liquid hydrogen storage tank group 1, the fifth liquid hydrogen pipeline 55, the four-way valve 4, the seventh liquid hydrogen branch pipeline 533, the third liquid hydrogen pipeline 53, the ninth liquid hydrogen branch pipeline 542, the eighth liquid hydrogen branch pipeline 541 and the first connecting port 31 of the supercharger 3, and after being heated and gasified by ambient air, the liquid hydrogen enters the upper gas phase space of the fixed liquid hydrogen storage tank through the second connecting port 32 of the supercharger 3, the second hydrogen pipeline 57, the sixth liquid hydrogen branch pipeline 532 and the first total gas port c of the fixed liquid hydrogen storage tank group 1, so that the fixed liquid hydrogen storage tank is pressurized. The self-boosting pressure regulating mode has the advantage of no energy consumption.
When the system is in a normal working condition, the pressure is regulated by preferentially adopting a mode of jointly regulating the pressure by a supercharger and an immersed pump in consideration of timeliness. As shown in fig. 8, the sixth valve 76, the seventh valve 77, the eighth valve 78, and the tenth valve 710 are opened, the j port and the f port of the four-way valve 4 are communicated, the i port and the g port are communicated, and the first valve 71, the second valve 72, the third valve 73, the fourth valve 74, the fifth valve 75, the ninth valve 79, the eleventh valve 711, and the twelfth valve 712 are closed.
Under the action of pressure difference, liquid hydrogen flows into the immersed pump pool 2 from a main liquid outlet a of the fixed liquid hydrogen storage tank group 1, a fifth liquid hydrogen pipeline 55, a first liquid hydrogen pipeline 51 and a pump pool liquid inlet 21 of the immersed pump pool 2, the liquid hydrogen is pumped out from the immersed pump liquid outlet 22 of the immersed pump pool 2 by the immersed pump 20, the pumped liquid hydrogen flows into the supercharger 3 through the second liquid hydrogen pipeline 52, the third liquid hydrogen branch pipeline 521, the four-way valve 4, the seventh liquid hydrogen branch pipeline 533, the third liquid hydrogen pipeline 53, the ninth liquid hydrogen branch pipeline 542, the eighth liquid hydrogen branch pipeline 541 and the first connecting port 31 of the supercharger 3, after being heated and gasified by ambient air, the gas enters the upper gas phase space of the fixed liquid hydrogen storage tank through the second connecting port 32 of the supercharger 3, the second hydrogen pipeline 57, the sixth liquid hydrogen branch pipeline 532 and the first total gas port c of the fixed liquid hydrogen storage tank group 1, so as to pressurize the fixed liquid hydrogen storage tank. The pressure regulating mode combining the pressure regulator and the immersed pump has the advantages of high pressure regulating speed, short pressure regulating time and high pressure.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.
The invention has the advantages that: the unloading and pressure regulating system shares one supercharger, and the unloading and pressure regulating processes of the liquid hydrogen tank truck and the fixed liquid hydrogen storage tank set are realized through the arrangement of a plurality of liquid hydrogen pipelines and a plurality of hydrogen pipelines and the control of valves. When the liquid hydrogen tank car unloads, one of three unloading modes of submerged pump unloading, self-pressurization unloading and combined unloading of a supercharger and the submerged pump can be realized by controlling each valve, so that the liquid hydrogen transported by the liquid hydrogen tank car is safely and reliably unloaded to a fixed liquid hydrogen storage tank group in the hydrogen storage type hydrogen filling station. The fixed liquid hydrogen storage tank group can realize one of two pressure regulating modes of self-pressurization and pressure regulation and combined pressure regulation of a supercharger and an immersed pump by controlling each valve during pressure regulation, thereby realizing the purpose of pressurization in each fixed liquid hydrogen storage tank, ensuring that liquid hydrogen in the fixed liquid hydrogen storage tank can be conveyed to a subsequent liquid hydrogen filling system or a high-pressure hydrogen filling system, and simultaneously ensuring that liquid hydrogen output to the liquid hydrogen hydrogenation system or the high-pressure hydrogen hydrogenation system from the fixed liquid hydrogen storage tank group is saturated liquid hydrogen so as to reduce the generation of BOG (liquid hydrogen flash evaporation hydrogen gas BOG for short) gas in a hydrogen conveying pipeline. Compact layout, simple flow, convenient operation and safe and reliable use.

Claims (9)

1. The utility model provides a pressure regulating system of unloading for storing up hydrogen type hydrogenation station which characterized in that: the method comprises the following steps: the system comprises a fixed liquid hydrogen storage tank group consisting of at least one fixed liquid hydrogen storage tank, a submerged pump pool, a supercharger, a four-way valve, a plurality of liquid hydrogen pipelines, a plurality of hydrogen pipelines and a plurality of valves, wherein the fixed liquid hydrogen storage tank group is provided with five connecting ports, namely a total liquid inlet b, a total liquid outlet a, a first total gas port c, a second total gas port d and a third total gas port e; the immersed pump pool is provided with three connectors, namely a pump pool liquid inlet, an immersed pump liquid outlet and a pump pool gas outlet; the supercharger is provided with a first connecting port, a second connecting port and a third connecting port; the four-way valve is provided with four connecting ports, namely an f port, a g port, a j port and an i port;
the plurality of liquid hydrogen pipelines comprises: a first liquid hydrogen pipeline, a second liquid hydrogen pipeline, a third liquid hydrogen pipeline, a fourth liquid hydrogen pipeline, a fifth liquid hydrogen pipeline, a first liquid hydrogen branch pipeline, a second liquid hydrogen branch pipeline, a third liquid hydrogen branch pipeline, a fourth liquid hydrogen branch pipeline, a fifth liquid hydrogen branch pipeline, a sixth liquid hydrogen branch pipeline, a seventh liquid hydrogen branch pipeline, an eighth liquid hydrogen branch pipeline and a ninth liquid hydrogen branch pipeline; the plurality of hydrogen gas conduits include: a first hydrogen gas conduit, a second hydrogen gas conduit, a third hydrogen gas conduit, and a fourth hydrogen gas conduit; the plurality of valves includes: the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, the eleventh valve and the twelfth valve;
one end of the first liquid hydrogen pipeline is fixedly provided with an unloading port joint which can be in sealed butt joint with an unloading port of the liquid hydrogen tank wagon, and the other end of the first liquid hydrogen pipeline is in sealed communication with a pump pond liquid inlet of the submerged pump pond; on first liquid hydrogen pipeline, by the mouth joint end of unloading to the other end interval be provided with first valve and second valve in proper order, be provided with two lateral conduits on the first liquid hydrogen pipeline between the pump pond inlet of second valve and submerged pump pond: the first liquid hydrogen branch pipeline is hermetically communicated with an f port of the four-way valve, and the second liquid hydrogen branch pipeline is connected with an air inlet of the high-pressure hydrogen filling system;
one end of the second liquid hydrogen pipeline is hermetically communicated with a liquid outlet of an immersed pump of the immersed pump pool, and the other end of the second liquid hydrogen pipeline forms two branches: the third liquid hydrogen branch pipeline is hermetically communicated with a port g of the four-way valve, and the fourth liquid hydrogen branch pipeline is connected with an inlet of the liquid hydrogen filling system;
one end of the third liquid hydrogen pipeline is connected to the first through hole on the side wall of the first liquid hydrogen pipeline between the first valve and the second valve in a sealing way, and the other end of the third liquid hydrogen pipeline forms a two-way branch: the fifth liquid hydrogen branch pipeline is hermetically communicated with a total liquid inlet b of the fixed liquid hydrogen storage tank group, the sixth liquid hydrogen branch pipeline is hermetically communicated with a first total gas port c of the fixed liquid hydrogen storage tank group, and a twelfth valve is arranged on the sixth liquid hydrogen branch pipeline; a third valve and a fourth valve are sequentially arranged on the third liquid hydrogen pipeline from the end, connected with the first through hole, of the side wall of the first liquid hydrogen pipeline to the other end at intervals, a seventh liquid hydrogen branch pipeline is arranged on the third liquid hydrogen pipeline between the third valve and the fourth valve, and the seventh liquid hydrogen branch pipeline is in sealed communication with the i port of the four-way valve;
the pressurizing port joint which can be in sealed butt joint with the pressurizing port of the liquid hydrogen tank car is fixedly arranged at one end of the fourth liquid hydrogen pipeline, and the other end of the fourth liquid hydrogen pipeline forms two branches: the eighth liquid hydrogen branch pipeline is hermetically communicated with a first connecting port of the supercharger, and the ninth liquid hydrogen branch pipeline is hermetically connected to a second through hole in the side wall of the third liquid hydrogen pipeline between the third valve and the fourth valve; a fifth valve is arranged on the fourth liquid hydrogen pipeline, a sixth valve is arranged on the eighth liquid hydrogen branch pipeline, and a seventh valve is arranged on the ninth liquid hydrogen branch pipeline;
one end of a fifth liquid hydrogen pipeline is in sealed communication with a general liquid outlet a of the fixed liquid hydrogen storage tank group, the other end of the fifth liquid hydrogen pipeline is in sealed communication with a j port of the four-way valve, and an eighth valve is arranged on the fifth liquid hydrogen pipeline;
a gas phase port joint which can be in sealed butt joint with a gas phase port of the liquid hydrogen tank car is fixedly arranged at one end of the first hydrogen pipeline, the other end of the first hydrogen pipeline is in sealed communication with a third connecting port of the supercharger, and a ninth valve is arranged on the first hydrogen pipeline;
one end of the second hydrogen pipeline is communicated with the second connecting port of the supercharger in a sealing way, the other end of the second hydrogen pipeline is connected to a third through hole in the side wall of the sixth liquid hydrogen branch pipeline between the twelfth valve and the first main gas port c in a sealing way, and the second hydrogen pipeline is provided with a tenth valve;
one end of a third hydrogen pipeline is hermetically communicated with a pump pool air outlet of the submerged pump pool, and the other end of the third hydrogen pipeline is hermetically communicated with a third total gas port e of the fixed liquid hydrogen storage tank group;
one end of a fourth hydrogen pipeline is communicated with a second total gas port d of the fixed liquid hydrogen storage tank group in a sealing mode, the other end of the fourth hydrogen pipeline is communicated with a gas inlet of a gas recovery system, and an eleventh valve is arranged on the fourth hydrogen pipeline.
2. The discharging pressure regulating system applied to the hydrogen storage type hydrogen refueling station according to claim 1, characterized in that: each liquid hydrogen pipeline and each hydrogen pipeline are respectively provided with a safety valve bank, a temperature sensor and a pressure sensor, wherein the safety valve bank is composed of an overpressure safety release port and a safety valve, and the release port of the safety valve bank is communicated with an air inlet of a gas recovery system.
3. The discharging pressure regulating system applied to the hydrogen storage type hydrogen refueling station according to claim 2, characterized in that: each safety valve group, each temperature sensor and each pressure sensor are connected with a control system with an alarm device; when the pressure in any liquid hydrogen pipeline or any hydrogen pipeline exceeds the set pressure of the control system, the control system starts the alarm device and starts the safety valve group on the corresponding liquid hydrogen pipeline to release the pressure.
4. The discharging pressure regulating system applied to the hydrogen storage type hydrogen refueling station according to claim 3, characterized in that: each valve is an electric regulating valve or a pneumatic regulating valve and is respectively connected with a control system; when unloading, the control system controls each valve, thereby realizing one of three unloading modes of unloading of the immersed pump, self-pressurization unloading and combined unloading of the supercharger and the immersed pump; when each fixed liquid hydrogen storage tank is pressurized, the control system can control each valve according to the pressure value and the temperature value in each liquid hydrogen pipeline and each hydrogen pipeline, so that one of two pressure regulating modes of self-pressurization pressure regulation and pressure regulation by combining a supercharger and an immersed pump is realized.
5. The discharging pressure regulating system applied to the hydrogen storage type hydrogen refueling station according to claim 1, characterized in that: the supercharger is a spiral fin tube type air heat exchanger.
6. The discharging pressure regulating system applied to the hydrogen storage type hydrogen refueling station as recited in claim 1, 2 or 5, wherein: the fixed liquid hydrogen storage tank is a vacuum heat-insulation storage tank, the vacuum heat-insulation storage tank is one of a vertical storage tank and a horizontal storage tank, and the vacuum heat-insulation storage tank is one of an overground storage tank and a buried storage tank; when the number of the fixed liquid hydrogen storage tanks is two or more, the fixed liquid hydrogen storage tanks are arranged in parallel, each fixed liquid hydrogen storage tank is provided with five connecting ports, namely a liquid inlet, a liquid outlet, a first gas port, a second gas port and a third gas port, the liquid inlets of the fixed liquid hydrogen storage tanks are connected in parallel to form a total liquid inlet b, the liquid outlets of the fixed liquid hydrogen storage tanks are connected in parallel to form a total liquid outlet a, the first gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a first total gas port c, the second gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a second total gas port d, and the third gas ports of the fixed liquid hydrogen storage tanks are connected in parallel to form a third total gas port e.
7. The system of claim 1, 2 or 5, wherein each of the liquid hydrogen pipes is a vacuum jacketed heat-insulating pipe, the vacuum jacketed heat-insulating pipe is composed of an inner pipe and an outer pipe which are coaxial, and a vacuum interlayer is arranged between the inner pipe and the outer pipe.
8. The discharging pressure regulating system applied to the hydrogen storage type hydrogen refueling station as recited in claim 1, 2 or 5, wherein: the gas recovery system is a BOG recovery utilization system or an EAG safe discharge system.
9. The discharging pressure regulating system applied to the hydrogen storage type hydrogen refueling station as recited in claim 1, 2 or 5, wherein: the unloading port joint and the pressurizing port joint are both joints formed by a liquid hydrogen breaking valve and a liquid hydrogen hose; the gas phase port joint is a joint formed by a hydrogen breaking valve and a hydrogen hose.
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