CN112483888A - Mixed supercharging multistage filling hydrogenation device - Google Patents

Mixed supercharging multistage filling hydrogenation device Download PDF

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Publication number
CN112483888A
CN112483888A CN202011558930.0A CN202011558930A CN112483888A CN 112483888 A CN112483888 A CN 112483888A CN 202011558930 A CN202011558930 A CN 202011558930A CN 112483888 A CN112483888 A CN 112483888A
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China
Prior art keywords
pressure
pipeline
port
communicated
hydrogen
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CN202011558930.0A
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Chinese (zh)
Inventor
王朝
杜海滨
况开锋
邱芳
苏红艳
马小红
陶晓伟
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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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Priority to CN202011558930.0A priority Critical patent/CN112483888A/en
Publication of CN112483888A publication Critical patent/CN112483888A/en
Priority to PCT/CN2021/135196 priority patent/WO2022135110A1/en
Pending legal-status Critical Current

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    • 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/002Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • 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
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00Arrangements for supervising or controlling working operations
    • F17D3/01Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107Single phase
    • F17C2223/0123Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036Very high pressure (>80 bar)
    • 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
    • F17C2265/00Effects achieved by gas storage or gas handling
    • F17C2265/06Fluid distribution
    • F17C2265/061Fluid distribution for supply of supplying vehicles
    • 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
    • F17C2265/068Distribution pipeline networks
    • 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
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/45Hydrogen technologies in production processes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a mixed supercharging multistage filling hydrogenation device, which comprises the following components: the system comprises a high-pressure unloading pry, a high-pressure compressor pry, a multi-stage filling high-pressure energy accumulator, a 70MPa high-pressure hydrogenation machine, a low-pressure unloading pry, a low-pressure compressor pry, a low-pressure energy accumulator, a 35MPa low-pressure hydrogenation machine, a first four-way valve with four connecting ports of an a port, a b port, a c port and a d port, a second four-way valve with four connecting ports of an e port, an f port, a g port and an h port, and a water chilling unit for cooling the high-pressure compressor pry and the low-pressure compressor pry; all the components are connected through a pipeline system, so that the purposes of mixed filling of 35MPa/70MPa, multistage mixed pressurization of low-pressure hydrogen and mutual standby hydrogen source between the high-pressure energy accumulator and the low-pressure energy accumulator are achieved. The method is characterized in that the pressure increase and the capacity expansion are carried out on the basis of not influencing the original 35MPa skid-mounted hydrogenation device: the hydrogenation pressure is increased from 35MPa to 70MPa/35MPa, the mixing and pressurizing are carried out, and the daily hydrogenation scale is increased from not more than 500kg/d to 1000kg/d and above; the pressurizing and expanding structure has the advantages of simple structure, convenience in installation, small modification workload, low cost and the like.

Description

Mixed supercharging multistage filling hydrogenation device
Technical Field
The invention relates to a hydrogenation device, in particular to a mixed pressurization multistage filling hydrogenation device.
Background
With the increasing prominence of global warming problems and the encouragement of development and utilization of hydrogen energy in various countries, more hydrogen fuel cell automobiles are put into the market. The hydrogenation device is used in a fuel cell automobile, just like a gas station is used in a traditional fuel oil automobile and a charging station is used in a pure electric automobile, and is an essential base stone for supporting the development of the fuel cell automobile industry.
At present, the market of hydrogen energy and fuel cells in China is still in the market introduction stage ‚ which is limited by the station building policy and land supply condition of the hydrogenation device in China, and the 35MPa skid-mounted hydrogenation device rapidly occupies the market by the advantages of modular integration of factories, small occupied area and fast station building. According to statistics, by 1 month in 2020, China has built 61 hydrogenation devices, wherein the hydrogenation pressure of more than 95 percent of the hydrogenation devices is 35MPa, and the daily hydrogenation capacity of more than 65 percent of the hydrogenation devices is not more than 500 kg/d. The hydrogen capacity is small, so that the demand is short, part of fuel cell vehicles have no hydrogen, the hydrogen pressure is low, so that the vehicle-mounted hydrogen storage capacity is insufficient, the endurance mileage competitiveness of the hydrogen fuel cell vehicles is insufficient, and the commercial popularization of the hydrogen fuel cell vehicles is limited. With the development of the development technology of 70MPa plastic liner vehicle-mounted hydrogen storage cylinders, the hydrogenation pressure and the hydrogenation capacity of the current 35MPa skid-mounted hydrogenation device cannot meet the development requirements of future large-scale 70MPa fuel cell automobiles, so that pressurization and expansion are urgently needed on the basis of not influencing the hydrogenation performance of the original 35MPa skid-mounted hydrogenation device, and 35MPa/70MPa mixed pressurization and filling are realized.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the mixed pressurized multistage filling hydrogenation device is used for pressurizing and expanding on the basis of the hydrogenation performance of the original 35MPa skid-mounted hydrogenation device, so that 35MPa/70MPa mixed filling is realized.
In order to solve the problems, the invention adopts the technical scheme that: the mixed pressurized multistage filling hydrogenation device comprises the following components: the system comprises a high-pressure unloading pry, a high-pressure compressor pry, a multi-stage filling high-pressure energy accumulator, a 70MPa high-pressure hydrogenation machine, a low-pressure unloading pry, a low-pressure compressor pry, a low-pressure energy accumulator, a 35MPa low-pressure hydrogenation machine, a first four-way valve with four connecting ports of an a port, a b port, a c port and a d port, a second four-way valve with four connecting ports of an e port, an f port, a g port and an h port, and a water chilling unit for cooling the high-pressure compressor pry and the low-pressure compressor pry; all the components are connected through a pipeline system, so that the purposes of mixed filling of 35MPa/70MPa, multistage mixed pressurization of low-pressure hydrogen and mutual standby hydrogen source between the high-pressure energy accumulator and the low-pressure energy accumulator are achieved.
The concrete connection mode that each component unit passes through piping system connection is as follows:
an outlet of the high-pressure unloading pry is communicated with an inlet of the high-pressure compressor pry through a first hydrogen conveying pipeline, an outlet of the high-pressure compressor pry is communicated with an inlet of the multistage filling high-pressure energy accumulator through a second hydrogen conveying pipeline, and an outlet of the multistage filling high-pressure energy accumulator is communicated with an inlet of a 70MPa high-pressure hydrogenation machine through a third hydrogen conveying pipeline, so that an independent 70MPa skid-mounted hydrogenation device is formed;
an outlet of the low-pressure unloading pry is communicated with an a port of the first four-way valve through a fourth hydrogen conveying pipeline, a c port of the first four-way valve is communicated with an inlet of the low-pressure compressor pry through a fifth hydrogen conveying pipeline, an outlet of the low-pressure compressor pry is communicated with an e port of the second four-way valve through a sixth hydrogen conveying pipeline, a g port of the second four-way valve is communicated with an inlet of a low-pressure energy accumulator through a seventh hydrogen conveying pipeline, and an outlet of the low-pressure energy accumulator is communicated with an inlet of a 35MPa low-pressure hydrogenation machine through an eighth hydrogen conveying pipeline, so that an independent 35MPa skid-mounted hydrogenation device is formed;
a first branch pipeline is arranged on the first hydrogen conveying pipeline, the first branch pipeline is communicated with a port d of the first four-way valve, and a first valve is arranged on the first hydrogen conveying pipeline between the first branch pipeline and an inlet of the high-pressure compressor pry; one end of a second branch pipeline is communicated with an outlet of the high-pressure compressor pry, and the other end of the second branch pipeline is communicated with an h port of the second four-way valve; a third branch pipeline is arranged on the third hydrogen conveying pipeline and communicated with the seventh hydrogen conveying pipeline, and a second valve is arranged on the third branch pipeline; one end of the fourth branch pipeline is communicated with the f port of the second four-way valve, and the other end of the fourth branch pipeline is communicated with the eighth hydrogen conveying pipeline.
Further, the mixed pressurized multistage filling hydrogenation device is characterized in that a fifth branch pipeline is arranged on the second hydrogen conveying pipeline, the fifth branch pipeline is communicated with an inlet of a 70MPa high-pressure hydrogenation machine, and a third valve is arranged on the fifth branch pipeline.
Further, the hybrid supercharged multistage filling hydrogenation device is further provided with a sixth branch pipeline, wherein one end of the sixth branch pipeline is communicated with the port b of the first four-way valve, and the other end of the sixth branch pipeline is communicated with an inlet of a 35MPa low-pressure hydrogenation machine.
Further, aforementioned mixed pressure boost multistage filling hydrogenation device, wherein, multistage filling high pressure energy storage ware is the second grade filling structure that comprises sequence control dish, a plurality of high-pressure hydrogen storage bottle that set up in parallel and a plurality of middling pressure hydrogen storage bottle that set up in parallel, and the high-pressure hydrogen storage bottle quantity is 1 with middling pressure hydrogen storage bottle quantity ratio: 2.
further, in the hybrid pressurized multi-stage filling hydrogenation apparatus, the sequence control panel is composed of a medium-pressure sequence control valve bank and a high-pressure sequence control valve bank; the specific structure of the multi-stage filling high-pressure accumulator is as follows: the outlet of the high-pressure compressor pry is respectively communicated with the inlet of the medium-pressure sequence control valve group and the inlet of the high-pressure sequence control valve group through a second hydrogen conveying pipeline, a first connecting pipeline is arranged at the outlet of the medium-pressure sequence control valve group, and the inlets and the outlets of the six medium-pressure hydrogen storage bottles are respectively communicated with the outlet of the first connecting pipeline through corresponding first branch connecting pipelines; the outlet of the high-pressure sequence control valve group is provided with a second connecting pipeline, and the inlets and the outlets of the three high-pressure hydrogen storage bottles are respectively communicated with the outlet of the second connecting pipeline through corresponding second branch connecting pipelines; the third hydrogen conveying pipeline is composed of a third connecting pipeline with a sixth valve and a fourth connecting pipeline with a seventh valve, one end of the third connecting pipeline is communicated with an outlet of the medium-pressure sequence control valve group, the other end of the third connecting pipeline is communicated with an inlet of the 70MPa high-pressure hydrogenation machine, one end of the fourth connecting pipeline is communicated with an outlet of the high-pressure sequence control valve group, and the other end of the fourth connecting pipeline is communicated with an inlet of the 70MPa high-pressure hydrogenation machine.
Further, in the hybrid pressurized multi-stage filling hydrogenation apparatus, each medium-pressure hydrogen storage bottle forms a medium-pressure hydrogen storage bottle group, each high-pressure hydrogen storage bottle forms a high-pressure hydrogen storage bottle group, and the high-pressure hydrogen storage bottle group is arranged above the medium-pressure hydrogen storage bottle group.
Further, in the hybrid pressurized multi-stage filling hydrogenation apparatus, a first branch pipeline with a fourth valve is arranged on the first connecting pipeline; and a second branch pipeline with a fifth valve is arranged on the second connecting pipeline.
The invention has the beneficial effects that: firstly, pressurizing and expanding on the basis of not influencing the original 35MPa skid-mounted hydrogenation device: the hydrogenation pressure is increased from 35MPa to 70MPa/35MPa, the mixing and pressurizing are carried out, and the daily hydrogenation scale is increased from not more than 500kg/d to 1000kg/d and above; the pressurizing and capacity-expanding structure has the advantages of simple structure, convenience in installation, small modification workload, low cost and the like; the independent 70MPa skid-mounted hydrogenation device and the independent 35MPa skid-mounted hydrogenation device can work independently or integrally: the pipeline connection between the high-pressure compressor pry and the low-pressure compressor pry can realize the multi-stage mixed pressurization of low-pressure hydrogen, effectively reduce the energy consumption of the compressor and improve the operation economy of the hydrogenation device; the pipeline connection between the multi-stage filling high-pressure energy accumulator and the low-pressure energy accumulator can realize that the multi-stage filling high-pressure energy accumulator and the low-pressure energy accumulator are mutually standby hydrogen sources, so that the hydrogen heading can be adjusted according to actual conditions, the utilization efficiency and flexibility of hydrogen are effectively improved, and the hydrogenation flexibility and reliability of the whole mixed supercharging multi-stage filling hydrogenation device are improved; the multi-stage filling high-pressure accumulator adopts direct flushing and two-stage filling, so that the gas taking rate of the whole mixed supercharging multi-stage filling hydrogenation device is improved, the use cost of hydrogen is effectively reduced, and the operation profit of a hydrogenation station is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of a hybrid pressurized multi-stage filling hydrogenation device according to the present invention.
Fig. 2 is a schematic diagram of a partially enlarged structure of fig. 1.
Fig. 3 is a schematic diagram of another partially enlarged structure of fig. 1.
Fig. 4 is a structural schematic diagram of a multi-stage charging high-pressure accumulator.
Fig. 5 is a schematic perspective view of a multi-stage charge high pressure accumulator.
FIG. 6 is a hydrogen flow diagram of a hybrid pressure-increasing multi-stage injection hydrogenation unit with one pressure increase.
FIG. 7 is a flow chart of hydrogen gas for secondary pressurization of a hybrid pressurization multistage filling hydrogenation device.
FIG. 8 is a hydrogen flow diagram of a hybrid pressurized multi-stage refueling hydrogenation unit for refueling a vehicle by direct flushing.
FIG. 9 is a hydrogen flow diagram of a hybrid pressurized multi-stage filling hydrogenation apparatus in which the low-pressure accumulator is a backup hydrogen source for the multi-stage filling high-pressure accumulator.
FIG. 10 is a hydrogen flow diagram of a hybrid pressurized multi-stage filling hydrogenation device in which a multi-stage filling high-pressure accumulator is a standby hydrogen source of a low-pressure accumulator.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
Example one
As shown in fig. 1, fig. 2 and fig. 3, the mixed pressurized multi-stage filling hydrogenation apparatus according to the present embodiment includes the following components: the high-pressure unloading skid comprises a high-pressure unloading skid 1, a high-pressure compressor skid 2, a multistage filling high-pressure accumulator 3, a 70MPa high-pressure hydrogenation machine 4, a low-pressure unloading skid 5, a low-pressure compressor skid 6, a low-pressure accumulator 7, a 35MPa low-pressure hydrogenation machine 8, a first four-way valve 9 with four connectors of an a port, a b port, a c port and a d port, a second four-way valve 10 with four connectors of an e port, an f port, a g port and an h port, and a water chilling unit 11 for cooling the high-pressure compressor skid 2 and the low-pressure compressor skid 6.
The outlet of the high-pressure unloading pry 1 is communicated with the inlet of the high-pressure compressor pry 2 through a first hydrogen conveying pipeline 12, the outlet of the high-pressure compressor pry 2 is communicated with the inlet of the multistage filling high-pressure energy accumulator 3 through a second hydrogen conveying pipeline 13, and the outlet of the multistage filling high-pressure energy accumulator 3 is communicated with the inlet of the 70MPa high-pressure hydrogenation machine 4 through a third hydrogen conveying pipeline 14, so that an independent 70MPa skid-mounted hydrogenation device is formed.
The outlet of the low-pressure unloading pry 5 is communicated with the port a of the first four-way valve 9 through a fourth hydrogen conveying pipeline 15, the port c of the first four-way valve 9 is communicated with the inlet of the low-pressure compressor pry 6 through a fifth hydrogen conveying pipeline 16, the outlet of the low-pressure compressor pry 6 is communicated with the port e of the second four-way valve 10 through a sixth hydrogen conveying pipeline 17, the port g of the second four-way valve 10 is communicated with the inlet of the low-pressure accumulator 7 through a seventh hydrogen conveying pipeline 18, the outlet of the low-pressure accumulator 7 is communicated with the inlet of the 35MPa low-pressure hydrogenation machine 8 through an eighth hydrogen conveying pipeline 19, and an independent 35MPa skid-mounted hydrogenation device is formed.
A first branch pipeline 20 is provided on the first hydrogen transport pipeline 12, the first branch pipeline 20 is communicated with the d port of the first four-way valve 9, and a first valve 26 is provided on the first hydrogen transport pipeline 20 between the first branch pipeline 20 and the inlet of the high pressure compressor sled 2.
One end of the second branch pipe 21 is communicated with an outlet of the high pressure compressor sled 2, and the other end of the second branch pipe 21 is communicated with an h port of the second four-way valve 10.
The third hydrogen supply line 14 is provided with a third branch line 22, the third branch line 22 communicates with the seventh hydrogen supply line 18, and the third branch line 14 is provided with a second valve 27.
One end of the fourth branch line 23 is communicated with the f-port of the second four-way valve 10, and the other end of the fourth branch line 23 is communicated with the eighth hydrogen transport line 19.
The second hydrogen conveying pipeline 13 is provided with a fifth branch pipeline 24, the fifth branch pipeline 24 is communicated with an inlet of the 70MPa high-pressure hydrogenation machine 4, and the fifth branch pipeline 24 is provided with a third valve 28.
One end of the sixth branch line 25 is communicated with the b port of the first four-way valve 9, and the other end of the sixth branch line 25 is communicated with the inlet of the 35MPa low-pressure hydrogenation unit 8.
The independent 70MPa skid-mounted hydrogenation unit and the independent 35MPa skid-mounted hydrogenation unit can work independently and also can work integrally: the pipeline connection between the high-pressure compressor pry 2 and the low-pressure compressor pry 6 can realize low-pressure hydrogen multi-stage mixed pressurization, effectively reduce the energy consumption of the compressor and improve the operation economy of the hydrogenation device. The specific hydrogen flow is as follows:
when hydrogen from the 20MPa tube bundle trailer 100 is taken as a gas source, and when the pressure of the hydrogen in the tube bundle trailer is larger than the air inlet pressure of the high-pressure compressor pry 2, as shown in fig. 6, the port a and the port d of the first four-way valve 9 are communicated, and the port b and the port c of the first four-way valve 9 are not communicated, the first valve 26 is opened, and at the moment, the hydrogen in the 20MPa tube bundle trailer 100, which is butted with the inlet of the high-pressure unloading pry 1, enters the first hydrogen conveying pipeline 12 through the high-pressure unloading pry 1; the hydrogen in the 20MPa tube bundle trailer 100 butted with the inlet of the low-pressure unloading pry 5 enters the first hydrogen conveying pipeline 12 through the low-pressure unloading pry 5, the fourth hydrogen conveying pipeline 15, the first four-way valve 9 and the first branch pipeline 20, is collected with the hydrogen entering the first hydrogen conveying pipeline 12 through the high-pressure unloading pry 1, is compressed to 87.5 +/-2.5 MPa through the high-pressure compressor pry 2 for one time, and is stored in the multistage filling high-pressure energy accumulator 3 through the third hydrogen conveying pipeline 14 for later use.
When the air inlet pressure of the low-pressure compressor pry 6 is less than the hydrogen pressure in the tube bundle trailer and less than or equal to the air inlet pressure of the high-pressure compressor pry 2, as shown in fig. 7, three connecting ports, namely the port a, the port d and the port c, of the first four-way valve 9 are communicated, the port e and the port h of the second four-way valve 10 are communicated, and at the moment, hydrogen in the 20MPa tube bundle trailer 100 which is in butt joint with the inlet of the low-pressure unloader pry 5 enters the fifth hydrogen conveying pipeline 16 through the fourth hydrogen conveying pipeline 15 and the first four-way valve 9; the hydrogen in the 20MPa tube bundle trailer 100 butted with the inlet of the high-pressure unloading skid 1 enters the fifth hydrogen conveying pipeline 16 through the high-pressure unloading skid 1, the first hydrogen conveying pipeline 12, the first branch pipeline 20 and the first four-way valve 9, is converged with the hydrogen entering the fifth hydrogen conveying pipeline 16 through the low-pressure unloading skid 5 and then enters the low-pressure compressor skid 6, is pressurized to 42.5 +/-2.5 MPa for the first time through the low-pressure compressor skid 6 and then enters the high-pressure compressor skid 2 through the second four-way valve 10, is pressurized to 87.5 +/-2.5 MPa for the second time through the high-pressure compressor skid 2, and is stored in the multi-stage filling high-pressure accumulator 3 through the second hydrogen conveying pipeline 13 for standby.
When hydrogen pressure is less than or equal to the inlet pressure of low-pressure compressor sled 6 in the tube bank trailer, the vehicle is annotated through the direct-flushing mode to the pressure differential in usable tube bank trailer and the on-vehicle hydrogen storage cylinder to furthest promotes hydrogen utilization ratio in the tube bank trailer, promotes the operation economy nature of hydrogenation station. Specifically, as shown in fig. 8, the three connection ports, i.e., the port a, the port d and the port b, of the first four-way valve 9 are communicated, and at this time, hydrogen in the 20MPa tube bundle trailer 100 with the inlet of the low-pressure unloading sled 5 in butt joint enters the sixth branch pipeline 25 through the fourth hydrogen conveying pipeline 15 and the first four-way valve 9; the hydrogen in the 20MPa tube bundle trailer 100 butted with the inlet of the high-pressure unloading pry 1 enters the sixth branch pipeline 25 through the high-pressure unloading pry 1, the first hydrogen conveying pipeline 12, the first branch pipeline 20 and the first four-way valve 9, and is collected with the hydrogen entering the sixth branch pipeline 25 through the low-pressure unloading pry 5 and then is directly conveyed to the 35MPa low-pressure hydrogenation machine 8 for external filling.
The pipeline connection between the high-pressure energy accumulator and the low-pressure energy accumulator can realize that the high-pressure energy accumulator and the low-pressure energy accumulator are mutually standby hydrogen sources, so that the hydrogen direction can be adjusted according to actual conditions, the utilization efficiency and flexibility of hydrogen are effectively improved, and the hydrogenation flexibility and reliability of the whole mixed supercharging multistage filling hydrogenation device are improved. The specific hydrogen flow is as follows:
when the hydrogen storage capacity of the multi-stage filling high-pressure energy accumulator 3 does not meet the requirement of external filling and the tube bundle-free trailer is used as a hydrogen source, the hydrogen in the low-pressure energy accumulator 7 can be secondarily compressed by the high-pressure compressor pry 2 and then conveyed to the multi-stage filling high-pressure energy accumulator 3 for buffering or conveyed to the 70MPa high-pressure hydrogenation machine 4 for external filling. Specifically, as shown in fig. 9, the f port and the h port of the second four-way valve 10 are communicated, hydrogen in the low-pressure accumulator 7 enters the high-pressure compressor pry 2 through the eighth hydrogen conveying pipeline 19, the fourth branch pipeline 23, the second four-way valve 10 and the second branch pipeline 21, is compressed to 87.5 ± 2.5MPa through the high-pressure compressor pry 2 for the first time, and is then stored in the multi-stage filling high-pressure accumulator 3 through the second hydrogen conveying pipeline 13 for standby. Or the third valve 28 is opened, and the hydrogen which is compressed to 87.5 +/-2.5 MPa by the high-pressure compressor pry 2 at one time is directly conveyed to the 70MPa high-pressure hydrogenation machine 4 through the fifth branch pipeline 24 for external filling.
The mixed supercharging multistage filling hydrogenation device with the structure can also utilize the pressure difference between the multistage filling high-pressure energy accumulator 3 and the low-pressure energy accumulator 7 to supplement hydrogen for the low-pressure energy accumulator 7, and the multistage filling high-pressure energy accumulator 3 is used as a replacement hydrogen source of the low-pressure energy accumulator 7, so that the hydrogenation flexibility and reliability of the whole mixed supercharging multistage filling hydrogenation device are improved. As shown in fig. 10, the second valve 27 is opened, and the hydrogen gas in the multi-stage charging high-pressure accumulator 3 is stored in the low-pressure accumulator 7 through the third hydrogen delivery pipe 14, the third branch pipe 22 and the seventh hydrogen delivery pipe 18. The hydrogen in the low-pressure accumulator 7 is conveyed to the 35MPa low-pressure hydrogenation machine 8 through an eighth hydrogen conveying pipeline 19 for external filling.
Example two
The present embodiment specifically describes the structure of the multi-stage charging high-pressure accumulator 3 on the basis of the first embodiment. The multi-stage filling high-pressure energy accumulator 3 is a two-stage filling structure consisting of a sequence control disc, a plurality of high-pressure hydrogen storage bottles 44 arranged in parallel and a plurality of medium-pressure hydrogen storage bottles 42 arranged in parallel, the number ratio of the high-pressure hydrogen storage bottles 44 to the medium-pressure hydrogen storage bottles 42 is 1: 2.
as shown in fig. 5, in the present embodiment, each of the medium-pressure hydrogen storage bottles 42 constitutes a medium-pressure hydrogen storage bottle group, and each of the high-pressure hydrogen storage bottles 44 constitutes a high-pressure hydrogen storage bottle group, which is disposed above the medium-pressure hydrogen storage bottle group.
As shown in fig. 4, the sequence control panel is composed of a medium pressure sequence control valve group 41 and a high pressure sequence control valve group 43; the specific structure of the multi-stage filling high-pressure accumulator 3 is as follows: the outlet of the high-pressure compressor pry 2 is respectively communicated with the inlet of the medium-pressure sequence control valve group 41 and the inlet of the high-pressure sequence control valve group 43 through a second hydrogen conveying pipeline 13, a first connecting pipeline 34 is arranged at the outlet of the medium-pressure sequence control valve group 41, and the inlets and the outlets of the six medium-pressure hydrogen storage bottles 42 are respectively communicated with the outlet of the first connecting pipeline 34 through corresponding first branch connecting pipelines 35. A second connecting pipeline 36 is arranged at the outlet of the high-pressure sequence control valve group 43, and the inlets and outlets of the three high-pressure hydrogen storage bottles 44 are respectively communicated with the outlet of the second connecting pipeline 36 through corresponding second branch connecting pipelines 37. The third hydrogen conveying pipeline 14 is composed of a third connecting pipeline 38 with a sixth valve 31 and a fourth connecting pipeline 39 with a seventh valve 32, one end of the third connecting pipeline 38 is communicated with an outlet of the medium-pressure sequence control valve group 41, and the other end of the third connecting pipeline 38 is communicated with an inlet of the 70MPa high-pressure hydrogenation machine 4. One end of the fourth connecting pipeline 39 is communicated with the outlet of the high-pressure sequence control valve group 43, and the other end of the fourth connecting pipeline 39 is communicated with the inlet of the 70MPa high-pressure hydrogenation machine 39.
A first branch line with a fourth valve 29 is arranged on the first connection line 34; a second branch line with a fifth valve 30 is arranged on the second connecting line 36.
The rated working pressure of each high-pressure hydrogen storage bottle 44 and each medium-pressure hydrogen storage bottle 42 is 90MPa, and the initial charging hydrogen pressure is 87.5 +/-2.5 MPa. In order to improve the hydrogen gas taking rate of the hydrogen storage bottle, a two-stage filling process is adopted. The multi-stage filling high-pressure accumulator 3 comprises 9 hydrogen storage bottles in total, and is divided into a medium-pressure group and a high-pressure group which are connected in parallel according to the control logic of the sequence control panel, wherein 6 medium-pressure hydrogen storage bottles are connected in parallel to form a medium-pressure hydrogen storage group, and 3 high-pressure hydrogen storage bottles are connected in parallel to form a high-pressure hydrogen storage group. The initial pressure of all 9 hydrogen storage bottles is 87.5 +/-2.5 MPa, and the filling method comprises the following steps:
filling air into a multi-stage filling high-pressure accumulator 3: the low-pressure hydrogen output by the tube bundle trailer or the low-pressure energy accumulator 7 is pressurized by the high-pressure compressor pry 2 and then cached in the multi-stage filling high-pressure energy accumulator 3, and when the pressure of each medium-pressure hydrogen storage bottle and each high-pressure hydrogen storage bottle of the multi-stage filling high-pressure energy accumulator 3 reaches 87.5 +/-2.5 MPa, air supply is stopped.
And secondly, gas taking and filling at one stage of the medium-pressure hydrogen storage cylinder group, namely after the gas is filled by the multistage filling high-pressure energy accumulator 3, starting a medium-pressure sequence control valve group 41 to take gas from the medium-pressure hydrogen storage cylinder group to hydrogenate the hydrogen fuel cell vehicle to 70MPa by a hydrogen station control system when 70MPa high-pressure hydrogen gas is filled for the first time. The hydrogen pressure of the medium-pressure hydrogen storage cylinder group after the first filling is finished is smaller than the hydrogen pressure in the high-pressure hydrogen storage cylinder group. When the subsequent filling is carried out, the medium-pressure sequence control valve group 41 is started by the hydrogen filling station control system to take gas from the medium-pressure hydrogen storage cylinder group for filling until the pressure difference between the medium-pressure hydrogen storage cylinder group and 70MPa is less than or equal to 2MPa, and the 70MPa hydrogenation requirement can not be realized through the primary gas taking and filling.
When the pressure difference between the medium-pressure hydrogen storage cylinder group and the 70MPa is less than or equal to 2MPa, the medium-pressure sequence control valve group 41 is started by a hydrogen filling station control system to take and fill gas from the medium-pressure hydrogen storage cylinder group, the medium-pressure sequence control valve group 41 is closed until the pressure difference between the medium-pressure hydrogen storage cylinder group and the vehicle-mounted hydrogen storage cylinder is less than or equal to 2MPa, and the high-pressure sequence control valve group 43 is started to take and fill gas from the high-pressure hydrogen storage cylinder group until the pressure of the vehicle-mounted hydrogen storage cylinder reaches 70 MPa. When the pressure difference between the medium-pressure hydrogen storage cylinder group and the high-pressure hydrogen storage cylinder group is less than or equal to 2MPa with the pressure difference of 70MPa, the multistage filling of the high-pressure accumulator 3 is carried out again for air supplement.
According to the scheme, the medium-pressure hydrogen storage cylinder group and the high-pressure hydrogen storage cylinder group are arranged to realize multi-stage gas taking and filling, so that the hydrogen utilization rate in the medium-pressure hydrogen storage cylinder group is improved to the maximum extent, the hydrogen use cost is effectively reduced, and the economy of a hydrogen station is improved.
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 beneficial effects that: firstly, pressurizing and expanding on the basis of not influencing the original 35MPa skid-mounted hydrogenation device: the hydrogenation pressure is increased from 35MPa to 70MPa/35MPa, the mixing and pressurizing are carried out, and the daily hydrogenation scale is increased from not more than 500kg/d to 1000kg/d and above; the pressurizing and capacity-expanding structure has the advantages of simple structure, convenience in installation, small modification workload, low cost and the like; the independent 70MPa skid-mounted hydrogenation device and the independent 35MPa skid-mounted hydrogenation device can work independently or integrally: the pipeline connection between the high-pressure compressor pry 2 and the low-pressure compressor pry 6 can realize low-pressure hydrogen multi-stage mixed pressurization, effectively reduce the energy consumption of the compressors and improve the operation economy of the hydrogenation device; the pipeline connection between the multi-stage filling high-pressure energy accumulator 3 and the low-pressure energy accumulator 7 can realize that the multi-stage filling high-pressure energy accumulator 3 and the low-pressure energy accumulator 7 are mutually used as standby hydrogen sources, so that the hydrogen heading can be adjusted according to actual conditions, the utilization efficiency and flexibility of hydrogen are effectively improved, and the hydrogenation flexibility and reliability of the whole mixed pressurization multi-stage filling hydrogenation device are improved; and the multi-stage filling high-pressure accumulator 3 adopts direct flushing and two-stage filling, so that the gas taking rate of the whole mixed supercharging multi-stage filling hydrogenation device is improved, the use cost of hydrogen is effectively reduced, and the operation profit of a hydrogenation station is improved.

Claims (7)

1. The utility model provides a mixed pressure boost multistage filling hydrogenation device which characterized in that: the method comprises the following components: the system comprises a high-pressure unloading pry, a high-pressure compressor pry, a multi-stage filling high-pressure energy accumulator, a 70MPa high-pressure hydrogenation machine, a low-pressure unloading pry, a low-pressure compressor pry, a low-pressure energy accumulator, a 35MPa low-pressure hydrogenation machine, a first four-way valve with four connecting ports of an a port, a b port, a c port and a d port, a second four-way valve with four connecting ports of an e port, an f port, a g port and an h port, and a water chilling unit for cooling the high-pressure compressor pry and the low-pressure compressor pry;
an outlet of the high-pressure unloading pry is communicated with an inlet of the high-pressure compressor pry through a first hydrogen conveying pipeline, an outlet of the high-pressure compressor pry is communicated with an inlet of the multistage filling high-pressure energy accumulator through a second hydrogen conveying pipeline, and an outlet of the multistage filling high-pressure energy accumulator is communicated with an inlet of a 70MPa high-pressure hydrogenation machine through a third hydrogen conveying pipeline, so that an independent 70MPa skid-mounted hydrogenation device is formed;
an outlet of the low-pressure unloading pry is communicated with an a port of the first four-way valve through a fourth hydrogen conveying pipeline, a c port of the first four-way valve is communicated with an inlet of the low-pressure compressor pry through a fifth hydrogen conveying pipeline, an outlet of the low-pressure compressor pry is communicated with an e port of the second four-way valve through a sixth hydrogen conveying pipeline, a g port of the second four-way valve is communicated with an inlet of a low-pressure energy accumulator through a seventh hydrogen conveying pipeline, and an outlet of the low-pressure energy accumulator is communicated with an inlet of a 35MPa low-pressure hydrogenation machine through an eighth hydrogen conveying pipeline, so that an independent 35MPa skid-mounted hydrogenation device is formed;
a first branch pipeline is arranged on the first hydrogen conveying pipeline, the first branch pipeline is communicated with a port d of the first four-way valve, and a first valve is arranged on the first hydrogen conveying pipeline between the first branch pipeline and an inlet of the high-pressure compressor pry; one end of a second branch pipeline is communicated with an outlet of the high-pressure compressor pry, and the other end of the second branch pipeline is communicated with an h port of the second four-way valve; a third branch pipeline is arranged on the third hydrogen conveying pipeline and communicated with the seventh hydrogen conveying pipeline, and a second valve is arranged on the third branch pipeline; one end of the fourth branch pipeline is communicated with the f port of the second four-way valve, and the other end of the fourth branch pipeline is communicated with the eighth hydrogen conveying pipeline.
2. The hybrid pressurized multi-stage injection hydrogenation unit of claim 1, wherein: and a fifth branch pipeline is arranged on the second hydrogen conveying pipeline, the fifth branch pipeline is communicated with an inlet of a 70MPa high-pressure hydrogenation machine, and a third valve is arranged on the fifth branch pipeline.
3. A hybrid pressurized multi-stage injection hydrogenation unit according to claim 1 or 2, characterized in that: and a sixth branch pipeline is further arranged, one end of the sixth branch pipeline is communicated with the port b of the first four-way valve, and the other end of the sixth branch pipeline is communicated with the inlet of the 35MPa low-pressure hydrogenation machine.
4. The hybrid pressurized multi-stage injection hydrogenation unit of claim 1, wherein: the multistage filling high-pressure energy accumulator is a secondary filling structure consisting of a sequence control disc, a plurality of high-pressure hydrogen storage bottles arranged in parallel and a plurality of medium-pressure hydrogen storage bottles arranged in parallel, and the number ratio of the high-pressure hydrogen storage bottles to the medium-pressure hydrogen storage bottles is 1: 2.
5. the hybrid pressurized multi-stage injection hydrogenation unit of claim 4, wherein: the sequence control panel consists of a medium-pressure sequence control valve group and a high-pressure sequence control valve group; the specific structure of the multi-stage filling high-pressure accumulator is as follows: the outlet of the high-pressure compressor pry is respectively communicated with the inlet of the medium-pressure sequence control valve group and the inlet of the high-pressure sequence control valve group through a second hydrogen conveying pipeline, a first connecting pipeline is arranged at the outlet of the medium-pressure sequence control valve group, and the inlets and the outlets of the six medium-pressure hydrogen storage bottles are respectively communicated with the outlet of the first connecting pipeline through corresponding first branch connecting pipelines; the outlet of the high-pressure sequence control valve group is provided with a second connecting pipeline, and the inlets and the outlets of the three high-pressure hydrogen storage bottles are respectively communicated with the outlet of the second connecting pipeline through corresponding second branch connecting pipelines; the third hydrogen conveying pipeline is composed of a third connecting pipeline with a sixth valve and a fourth connecting pipeline with a seventh valve, one end of the third connecting pipeline is communicated with an outlet of the medium-pressure sequence control valve group, the other end of the third connecting pipeline is communicated with an inlet of the 70MPa high-pressure hydrogenation machine, one end of the fourth connecting pipeline is communicated with an outlet of the high-pressure sequence control valve group, and the other end of the fourth connecting pipeline is communicated with an inlet of the 70MPa high-pressure hydrogenation machine.
6. A hybrid pressurized multi-stage injection hydrogenation unit according to claim 4 or 5, characterized in that: the medium-pressure hydrogen storage bottles form a medium-pressure hydrogen storage bottle group, the high-pressure hydrogen storage bottles form a high-pressure hydrogen storage bottle group, and the high-pressure hydrogen storage bottle group is arranged above the medium-pressure hydrogen storage bottle group.
7. The hybrid pressurized multi-stage injection hydrogenation unit of claim 5, wherein: a first branch pipeline with a fourth valve is arranged on the first connecting pipeline; and a second branch pipeline with a fifth valve is arranged on the second connecting pipeline.
CN202011558930.0A 2020-12-25 2020-12-25 Mixed supercharging multistage filling hydrogenation device Pending CN112483888A (en)

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