CN110762385A - Sequence valve group control system and hydrogen pressing and hydrogenation method thereof - Google Patents
Sequence valve group control system and hydrogen pressing and hydrogenation method thereof Download PDFInfo
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- CN110762385A CN110762385A CN201910938633.XA CN201910938633A CN110762385A CN 110762385 A CN110762385 A CN 110762385A CN 201910938633 A CN201910938633 A CN 201910938633A CN 110762385 A CN110762385 A CN 110762385A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 410
- 239000001257 hydrogen Substances 0.000 title claims abstract description 409
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 409
- 238000003825 pressing Methods 0.000 title claims abstract description 95
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 51
- 150000002431 hydrogen Chemical class 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Classifications
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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
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
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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
- 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
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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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
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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
- 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
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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
- 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
- F17C2227/0171—Arrangement
- F17C2227/0185—Arrangement comprising several pumps or compressors
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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
- 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
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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
- 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
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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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/02—Improving properties related to fluid or fluid transfer
- F17C2260/025—Reducing transfer time
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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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
- F17C2270/0178—Cars
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a sequence valve group control system and a hydrogen pressing and hydrogenation method thereof, wherein the hydrogen pressing and hydrogenation method comprises the following steps: a hydrogen source vehicle; the hydrogen source conveying pipe is provided with an emergency cut-off valve; the hydrogen pressing system comprises a hydrogen pressing machine and an internal circulating valve which are connected in parallel; the hydrogen pressing pipeline comprises a hydrogen pressing main pipe, the first end of the hydrogen pressing main pipe is connected with a hydrogen pressing system, and the second end of the hydrogen pressing main pipe is divided into a hydrogen pressing low-pressure branch pipe, a hydrogen pressing medium-pressure branch pipe and a hydrogen pressing high-pressure branch pipe; the hydrogenation machine comprises a low-pressure hydrogen inlet pipe connected with the low-pressure hydrogen outlet pipe, a medium-pressure hydrogen inlet pipe connected with the medium-pressure hydrogen outlet pipe, a high-pressure hydrogen inlet pipe connected with the high-pressure hydrogen outlet pipe, and vehicle hydrogenation pipes respectively connected with the low-pressure hydrogen inlet pipe, the medium-pressure hydrogen inlet pipe and the high-pressure hydrogen inlet pipe. The invention can select proper pressure grade to finish the hydrogenation operation of the hydrogen energy automobile, does not generate the conflict and the runaway condition between two adjacent hydrogenation operations, and reliably, efficiently and fully utilizes the hydrogen compressor of the hydrogen compression system.
Description
Technical Field
The invention relates to the technical field of valve control, in particular to a sequence valve group control system and a hydrogen pressing and hydrogenation method thereof.
Background
At present, the hydrogen energy industry is in the stage of just rising, and the hydrogen energy car industry is greatly limited in use scene due to the small number of hydrogen stations. Many consumers give up purchasing hydrogen energy automobiles due to inconvenient hydrogenation, so that the hydrogen energy automobiles are not sold in good view. The more outstanding problem is that the existing hydrogen station is not efficient enough to utilize the hydrogen compressor.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a sequence valve set control system and a hydrogen pressing and hydrogenation method thereof, which can select an appropriate pressure level to complete the hydrogenation operation of a hydrogen energy vehicle, avoid conflict and runaway between two adjacent hydrogenation operations, and reliably, efficiently and fully utilize a hydrogen pressing machine of a hydrogen pressing system.
In order to solve the above technical problem, the present invention provides a sequential valve group control system, including:
a hydrogen source vehicle;
the emergency cut-off valve is arranged on the hydrogen source conveying pipe, the first end and the second end of the hydrogen source conveying pipe are respectively arranged at the two ends of the hydrogen source conveying pipe in the extending direction, and the first end of the hydrogen source conveying pipe is connected with the hydrogen source vehicle;
the hydrogen pressing system is connected with the second end of the hydrogen source conveying pipe and comprises a hydrogen pressing machine and an internal circulating valve which are mutually connected in parallel;
the hydrogen pressing pipeline comprises a hydrogen pressing main pipe, the two ends of the hydrogen pressing main pipe in the extension direction are respectively a first end and a second end, the first end of the hydrogen pressing main pipe is connected with a hydrogen pressing system, the second end of the hydrogen pressing main pipe is divided into a hydrogen pressing low-pressure branch pipe connected to a low-pressure hydrogen storage bottle, a hydrogen pressing medium-pressure branch pipe connected to a medium-pressure hydrogen storage bottle and a hydrogen pressing high-pressure branch pipe connected to the high-pressure hydrogen storage bottle, a first low-pressure valve, a low-pressure transmitter and a second low-pressure valve are sequentially arranged on the hydrogen pressing low-pressure branch pipe from the second end of the hydrogen pressing main pipe to the low-pressure hydrogen storage bottle, a low-pressure hydrogen pressing pipe is transversely led out of the hydrogen pressing low-pressure branch pipe between the first low-pressure valve and the second low-pressure valve, a first medium-pressure valve, a medium-pressure transmitter and a second medium-pressure valve are sequentially arranged on the hydrogen pressing medium-pressure branch pipe from the second end of the hydrogen pressing main pipe to the medium, the hydrogen pressing high-pressure branch pipe is provided with a first high-pressure valve, a high-pressure transmitter and a second high-pressure valve in sequence from the second end of the hydrogen pressing main pipe to the high-pressure hydrogen storage bottle, and the hydrogen pressing high-pressure branch pipe between the first high-pressure valve and the second high-pressure valve is transversely led out of the high-pressure hydrogen pressing pipe;
the hydrogenation machine comprises a low-pressure hydrogen inlet pipe connected with the low-pressure hydrogen outlet pipe, a medium-pressure hydrogen inlet pipe connected with the medium-pressure hydrogen outlet pipe, a high-pressure hydrogen inlet pipe connected with the high-pressure hydrogen outlet pipe, and a vehicle hydrogenation pipe respectively connected with the low-pressure hydrogen inlet pipe, the medium-pressure hydrogen inlet pipe and the high-pressure hydrogen inlet pipe, wherein a hydrogenation pressure transmitter is arranged on the vehicle hydrogenation pipe.
Preferably, the number of the low pressure hydrogen storage cylinders is three, the number of the medium pressure hydrogen storage cylinders is two, and the number of the high pressure hydrogen storage cylinders is one.
Preferably, the number of hydrotreaters is two.
Preferably, a low-pressure hydrogen inlet valve is arranged on the low-pressure hydrogen inlet pipe, a medium-pressure hydrogen inlet valve is arranged on the medium-pressure hydrogen inlet pipe, and a high-pressure hydrogen inlet valve is arranged on the high-pressure hydrogen inlet pipe.
The invention also provides a hydrogen compression hydrogenation method of the sequence valve group control system, which comprises the following steps:
s1, the pressure of hydrogen when the hydrogen energy automobile is full is 35 Mpa; the low-pressure hydrogen storage bottle, the medium-pressure hydrogen storage bottle and the high-pressure hydrogen storage bottle are all in a hydrogen full state with the hydrogen pressure of 45 Mpa;
s2, opening the second low-pressure valve, and taking hydrogen from the low-pressure hydrogen storage bottle by the hydrogenation machine; when the detection value of the low-pressure transmitter is smaller than 43Mpa, opening the first low-pressure valve, and if the hydrogenation machine does not take hydrogen from the low-pressure hydrogen storage bottle any more, closing the first low-pressure valve when the detection value of the low-pressure transmitter reaches 45 Mpa; if the hydrogenation machine continues to take hydrogen from the low-pressure hydrogen storage bottle and the detection value of the low-pressure transmitter continues to become small, executing step S3;
s3, opening a second medium-pressure valve, and switching a hydrogenation machine to take hydrogen from a medium-pressure hydrogen storage bottle; when the detection value of the medium-pressure transmitter is less than 43Mpa, the first low-pressure valve is closed and the first medium-pressure valve is opened, and the hydrogen pressure system switches to supply hydrogen to the medium-pressure hydrogen storage bottle; if the hydrogenation machine does not take hydrogen from the medium-pressure hydrogen storage bottle any more, closing the first medium-pressure valve when the detection value of the medium-pressure transmitter reaches 45Mpa, and opening the first low-pressure valve until the detection value of the low-pressure transmitter reaches 45Mpa, wherein the detection value of the low-pressure transmitter is smaller than 43 Mpa; if the hydrogenation machine continues to take hydrogen from the medium-pressure hydrogen storage bottle and the detection value of the medium-pressure transmitter continues to become small, executing step S4;
s4, opening a second high-pressure valve, and switching a hydrogenation machine to take hydrogen from a high-pressure hydrogen storage bottle; when the detection value of the high-pressure transmitter is smaller than 43Mpa, closing the first medium-pressure valve and opening the first high-pressure valve, and switching the hydrogen pressing system to press hydrogen for the high-pressure hydrogen storage bottle; if the hydrogenation machine does not take hydrogen from the high-pressure hydrogen storage bottle any more, closing the first high-pressure valve when the detection value of the high-pressure transmitter reaches 45Mpa, and opening the first medium-pressure valve and the first low-pressure valve until the detection values of the medium-pressure transmitter and the low-pressure transmitter reach 45Mpa, wherein the detection values of the medium-pressure transmitter and the low-pressure transmitter are both smaller than 43 Mpa; if the hydrogenation machine continues to take hydrogen from the high-pressure hydrogen storage bottle and the detection value of the high-pressure transmitter continues to become small, executing step S5;
and S5, calculating a pressure difference value between the detection value of the high-pressure transmitter and the detection value of the hydrogenation pressure transmitter, and if the pressure difference value is less than the pipeline pressure loss value 2Mpa between the high-pressure hydrogen storage bottle and the hydrogenation machine, closing the first high-pressure valve to enable the hydrogen compression system to directly convey the hydrogen to the high-pressure hydrogen pipe of the hydrogenation machine until the hydrogen energy automobile is filled with the hydrogen.
Preferably, the hydrogen pressing system further comprises a hydrogen pressing pressure transmitter, the hydrogen pressing pressure transmitter is used for detecting the pressure of the hydrogen flowing through the hydrogen pressing system, and if the detection value of the hydrogen pressing pressure transmitter is larger than 45Mpa, the internal circulation valve is opened, so that the hydrogen pressing machine performs a self-circulation flow; and if the detection value of the hydrogen pressure transmitter is less than 45Mpa, closing the internal circulating valve to improve the pressure of the hydrogen flowing through the hydrogen compression system.
As described above, the sequence valve bank control system and the hydrogen compression hydrogenation method thereof of the present invention have the following beneficial effects: the sequence valve group control system can reliably, efficiently and fully utilize the hydrogen compressor of the hydrogen compression system. After the hydrogenation operation of the hydrogen energy automobile is completed, the low-pressure hydrogen storage bottle, the medium-pressure hydrogen storage bottle and the high-pressure hydrogen storage bottle can be restored to a full hydrogen state. If a hydrogen energy automobile is used for hydrogenation in the period, the sequence valve group control system can select a proper pressure grade to finish the hydrogenation operation of the next hydrogen energy automobile, and the conditions of conflict and runaway between two adjacent hydrogenation operations can not occur. After the low-pressure hydrogen storage bottle, the medium-pressure hydrogen storage bottle and the high-pressure hydrogen storage bottle are all in full hydrogen operation, the hydrogen pressing system can be manually stopped. It is worth noting that the core working principle of the sequence valve group control system is as follows: when no hydrogen energy automobile is used for hydrogenation, the hydrogen compression system operates according to the sequence of high pressure, medium pressure and low pressure; when hydrogen energy vehicles are used for hydrogenation, the hydrogen compression system and the hydrogenation machine operate according to the sequence of low pressure, medium pressure and high pressure.
Drawings
Fig. 1 is a schematic diagram of a priority valve bank control system according to the present invention.
Description of the element reference numerals
1 hydrogen source vehicle
2 hydrogen source conveying pipe
21 emergency cut-off valve
3 pressure hydrogen system
31 pressure hydrogen machine
32 internal circulation valve
33 pressure hydrogen pressure transmitter
4 pressure hydrogen pipeline
41 pressure hydrogen main pipe
42-pressure hydrogen low-pressure branch pipe
421 low pressure hydrogen storage bottle
422 first low-pressure valve
423 low-voltage transmitter
424 second low pressure valve
425 low-pressure hydrogen outlet pipe
43 pressure hydrogen medium pressure branch pipe
431 medium-pressure hydrogen storage bottle
432 first medium pressure valve
433 Medium voltage transmitter
434 second medium pressure valve
435 middle pressure hydrogen-discharging pipe
44-pressure hydrogen high-pressure branch pipe
441 high-pressure hydrogen storage bottle
442 first high-pressure valve
443 high-voltage transmitter
444 second high pressure valve
445 high pressure hydrogen discharge tube
5 hydrogenation machine
51 low pressure hydrogen inlet pipe
511 low pressure hydrogen inlet valve
52 medium pressure hydrogen inlet pipe
521 medium pressure hydrogen inlet valve
53 high pressure hydrogen inlet pipe
531 high pressure hydrogen inlet valve
54 vehicle hydrogenation pipe
541 hydrogenation pressure transmitter
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown, the present invention provides a sequential valve group control system, comprising:
a hydrogen source vehicle 1;
the hydrogen source conveying pipe 2 is provided with an emergency cut-off valve 21 (the emergency cut-off valve 21 is used for cutting off the hydrogen source conveying pipe 2 in emergency and is in an open state in hydrogen using condition), two ends of the hydrogen source conveying pipe 2 in the extending direction are respectively a first end and a second end, and the first end of the hydrogen source conveying pipe 2 is connected with the hydrogen source vehicle 1;
the hydrogen pressing system 3 is connected with the second end of the hydrogen source conveying pipe 2, and the hydrogen pressing system 3 comprises a hydrogen pressing machine 31 and an internal circulating valve 32 which are connected in parallel; when the pressure of the hydrogen flowing through the hydrogen compression system 3 is higher than a preset value, the internal circulation valve 32 is in a passage state to ensure the safety of the sequence valve group control system; when the pressure of the hydrogen flowing through the hydrogen compression system 3 is lower than a preset value, the internal circulation valve 32 is in an open circuit state to ensure that the hydrogen with sufficient pressure is supplied to the next stage;
the hydrogen pressing pipeline 4 comprises a hydrogen pressing main pipe 41, two ends of the hydrogen pressing main pipe 41 in the extending direction are respectively a first end and a second end, the first end of the hydrogen pressing main pipe 41 is connected with the hydrogen pressing system 3, the second end of the hydrogen pressing main pipe 41 is divided into a hydrogen pressing low-pressure branch pipe 42 connected to a low-pressure hydrogen storage bottle 421, a hydrogen pressing medium-pressure branch pipe 43 connected to a medium-pressure hydrogen storage bottle 431 and a hydrogen pressing high-pressure branch pipe 44 connected to a high-pressure hydrogen storage bottle 441, a first low-pressure valve 422, a low-pressure transmitter 423 and a second low-pressure valve 424 are sequentially arranged on the hydrogen pressing low-pressure branch pipe 42 from the second end of the hydrogen pressing main pipe 41 to the low-pressure hydrogen storage bottle 421, a low-pressure hydrogen pressing pipe 425 is transversely led out of the hydrogen pressing low-pressure branch pipe 42 between the first low-pressure valve 422 and the second low-pressure valve 424, a first medium-pressure valve 432, a second medium-pressure valve 432 and a, A medium pressure transmitter 433 and a second medium pressure valve 434, a medium pressure hydrogen discharge pipe 435 is transversely led out from the medium pressure hydrogen branch pipe 43 between the first medium pressure valve 432 and the second medium pressure valve 343, a first high pressure valve 442, a high pressure transmitter 443 and a second high pressure valve 444 are sequentially arranged on the high pressure hydrogen discharge pipe 44 from the second end of the main hydrogen discharge pipe 41 to the high pressure hydrogen storage bottle 441, and a high pressure hydrogen discharge pipe 445 is transversely led out from the high pressure hydrogen discharge pipe 44 between the first high pressure valve 442 and the second high pressure valve 444;
the hydrogenation device 5 comprises a low-pressure hydrogen inlet pipe 51 connected with the low-pressure hydrogen outlet pipe 425, a medium-pressure hydrogen inlet pipe 52 connected with the medium-pressure hydrogen outlet pipe 435, a high-pressure hydrogen inlet pipe 53 connected with the high-pressure hydrogen outlet pipe 445, and a vehicle hydrogenation pipe 54 respectively connected with the low-pressure hydrogen inlet pipe 51, the medium-pressure hydrogen inlet pipe 52 and the high-pressure hydrogen inlet pipe 53, wherein a hydrogenation pressure transmitter 541 is arranged on the vehicle hydrogenation pipe 54.
The hydrogen compressor 31 of the hydrogen compression system 3 can be reliably, efficiently and fully utilized by the sequence valve group control system of the invention. After the hydrogenation operation of the hydrogen energy automobile is completed, the low-pressure hydrogen storage bottle 421, the medium-pressure hydrogen storage bottle 431 and the high-pressure hydrogen storage bottle 441 can be restored to a full hydrogen state. If a hydrogen energy automobile is used for hydrogenation in the period, the sequence valve group control system can select a proper pressure grade to finish the hydrogenation operation of the next hydrogen energy automobile, and the conditions of conflict and runaway between two adjacent hydrogenation operations can not occur. After the low pressure hydrogen storage bottle 421, the medium pressure hydrogen storage bottle 431, and the high pressure hydrogen storage bottle 441 are all in the hydrogen full operation, the hydrogen pressurizing system 3 may be manually stopped. It is worth noting that the core operating principle of the sequential valve group control system is as follows:
when no hydrogen energy automobile is used for hydrogenation, the hydrogen compression system 3 operates according to the sequence of high pressure, medium pressure and low pressure; when hydrogen energy vehicles are used for hydrogenation, the hydrogen compression system 3 and the hydrogenation machine 5 operate according to the sequence of low pressure, medium pressure and high pressure.
As an embodiment of the sequential valve group control system described above: the number of the low pressure hydrogen storage bottles 421 is three, the number of the medium pressure hydrogen storage bottles 431 is two, and the number of the high pressure hydrogen storage bottles 441 is one.
As another embodiment of the sequential valve group control system described above: the number of the hydrotreaters 5 is two.
Further, the low pressure hydrogen inlet valve 511 is provided in the low pressure hydrogen pipe 51, the medium pressure hydrogen inlet valve 521 is provided in the medium pressure hydrogen pipe 52, and the high pressure hydrogen inlet valve 531 is provided in the high pressure hydrogen pipe 53.
The invention also provides a hydrogen compression hydrogenation method of the sequence valve group control system, which comprises the following steps:
s1, the pressure of hydrogen when the hydrogen energy automobile is full is 35 Mpa; the low pressure hydrogen storage bottle 421, the medium pressure hydrogen storage bottle 431 and the high pressure hydrogen storage bottle 441 are all in a hydrogen full state with the hydrogen pressure of 45 Mpa;
s2, opening the second low pressure valve 424, the hydrogenation machine 5 taking hydrogen from the low pressure hydrogen storage bottle 421; when the detection value of the low-pressure transmitter 423 is smaller than 43Mpa, opening the first low-pressure valve 422, and if the hydrogenation machine 5 does not take hydrogen from the low-pressure hydrogen storage bottle 421 any more, closing the first low-pressure valve 422 when the detection value of the low-pressure transmitter 423 reaches 45 Mpa; if the hydrogenation unit 5 continues to take hydrogen gas from the low pressure hydrogen storage bottle 421 and the detection value of the low pressure transmitter 423 continues to decrease, step S3 is executed;
s3, opening a second medium-pressure valve 343, and switching the hydrogenation machine 5 to take hydrogen from the medium-pressure hydrogen storage bottle 431 so as to continuously meet the hydrogenation requirement of the hydrogen energy automobile; when the detection value of the medium pressure transmitter 433 is less than 43Mpa, the first low pressure valve 422 is closed and the first medium pressure valve 432 is opened, and the hydrogen pressurizing system 3 switches to pressurize hydrogen to the medium pressure hydrogen storage bottle 431 so as to ensure a higher hydrogen pressurizing condition; if the hydrogenation machine 5 does not take hydrogen from the medium-pressure hydrogen storage bottle 431 any longer, the first medium-pressure valve 432 is closed when the detection value of the medium-pressure transmitter 433 reaches 45Mpa, and at this time, the detection value of the low-pressure transmitter 423 is smaller than 43Mpa, and the first low-pressure valve 422 is opened until the detection value of the low-pressure transmitter 423 reaches 45 Mpa; if the hydrogenation unit 5 continues to take hydrogen gas from the medium pressure hydrogen storage bottle 431 and the detection value of the medium pressure transmitter 433 continues to become small, step S4 is executed;
s4, opening the second high-pressure valve 444, and switching the hydrogenation machine 5 to take hydrogen from the high-pressure hydrogen storage bottle 441 so as to continuously meet the hydrogenation requirement of the hydrogen energy automobile; when the detection value of the high-pressure transmitter 443 is smaller than 43Mpa, the first medium-pressure valve 432 is closed and the first high-pressure valve 442 is opened, and the hydrogen pressurization system 3 switches to pressurize hydrogen for the high-pressure hydrogen storage bottle 441 to ensure a higher-level hydrogen pressurization condition; if the hydrogenation machine 5 does not take hydrogen from the high-pressure hydrogen storage bottle 441 any more, the first high-pressure valve 442 is closed when the detection value of the high-pressure transmitter 443 reaches 45Mpa, at this time, the detection values of the medium-pressure transmitter 433 and the low-pressure transmitter 423 are both smaller than 43Mpa, and the first medium-pressure valve 432 and the first low-pressure valve 422 are opened until the detection values of the medium-pressure transmitter 433 and the low-pressure transmitter 423 reach 45 Mpa; if the hydrogen pump 5 continues to take hydrogen gas from the high-pressure hydrogen storage bottle 441 and the detection value of the high-pressure transmitter 443 continues to become small, step S5 is executed;
s5, calculating the pressure difference between the detection value of the high pressure transmitter 443 and the detection value of the hydrogenation pressure transmitter 541, if the pressure difference is less than the pipeline pressure loss value 2Mpa between the high pressure hydrogen storage bottle 441 and the hydrogenation machine 5, closing the first high pressure valve 442, so that the hydrogen system 3 directly transmits the hydrogen gas to the high pressure hydrogen inlet pipe 53 of the hydrogenation machine 5 until the hydrogen energy automobile is filled with the hydrogen gas.
Further, the hydrogen pressing system 3 further includes a hydrogen pressing pressure transmitter 33, the hydrogen pressing pressure transmitter 33 is configured to detect a pressure of the hydrogen gas flowing through the hydrogen pressing system 3, and if a detection value of the hydrogen pressing pressure transmitter 33 is greater than 45Mpa, the internal circulation valve 32 is opened, so that the hydrogen pressing machine 31 performs a self-circulation flow; if the detection value of the hydrogen pressure transmitter 33 is less than 45Mpa, the internal circulation valve 32 is closed to increase the pressure of the hydrogen gas flowing through the hydrogen compression system 3.
In conclusion, the sequence valve group control system and the hydrogen pressing and hydrogenation method thereof can select a proper pressure grade to finish the hydrogenation operation of the hydrogen energy automobile, the conflict and the runaway between two adjacent hydrogenation operations can not occur, and the hydrogen pressing machine of the hydrogen pressing system can be reliably, efficiently and fully utilized. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A sequential valve stack control system, comprising:
a hydrogen source vehicle (1);
the emergency cut-off valve (21) is arranged on the hydrogen source conveying pipe (2), the two ends of the hydrogen source conveying pipe (2) in the extending direction are respectively a first end and a second end, and the first end of the hydrogen source conveying pipe (2) is connected with the hydrogen source vehicle (1);
the hydrogen pressing system (3), the hydrogen pressing system (3) is connected with the second end of the hydrogen source conveying pipe (2), and the hydrogen pressing system (3) comprises a hydrogen pressing machine (31) and an internal circulating valve (32) which are connected in parallel;
the hydrogen pressing pipeline (4) comprises a hydrogen pressing main pipe (41), the two ends of the hydrogen pressing main pipe (41) in the extension direction are respectively a first end and a second end, the first end of the hydrogen pressing main pipe (41) is connected with the hydrogen pressing system (3), the second end of the hydrogen pressing main pipe (41) is divided into a hydrogen pressing low-pressure branch pipe (42) connected to the low-pressure hydrogen storage bottle (421), a hydrogen pressing medium-pressure branch pipe (43) connected to the medium-pressure hydrogen storage bottle (431) and a hydrogen pressing high-pressure branch pipe (44) connected to the high-pressure hydrogen storage bottle (441), a first low-pressure valve (422), a low-pressure transmitter (423) and a second low-pressure valve (424) are sequentially arranged on the hydrogen pressing low-pressure branch pipe (42) from the second end of the hydrogen pressing main pipe (41) to the low-pressure hydrogen storage bottle (421), and a low-pressure hydrogen pressing pipe (425) is transversely led out of the hydrogen pressing branch pipe (42) positioned between the first low-pressure valve (, a first medium pressure valve (432), a medium pressure transmitter (433) and a second medium pressure valve (434) are sequentially arranged on the hydrogen pressure medium pressure branch pipe (43) from the second end of the hydrogen pressure main pipe (41) to a medium pressure hydrogen storage bottle (431), a medium pressure hydrogen outlet pipe (435) is transversely led out from the hydrogen pressure medium pressure branch pipe (43) between the first medium pressure valve (432) and the second medium pressure valve (343), a first high pressure valve (442), a high pressure transmitter (443) and a second high pressure valve (444) are sequentially arranged on the hydrogen pressure high pressure branch pipe (44) from the second end of the hydrogen pressure main pipe (41) to the high pressure hydrogen storage bottle (441), and a high pressure hydrogen outlet pipe (445) is transversely led out from the hydrogen pressure high pressure branch pipe (44) between the first high pressure valve (442) and the second high pressure valve (444);
the hydrogenation device (5) comprises a low-pressure hydrogen pipe (51) connected with the low-pressure hydrogen outlet pipe (425), a medium-pressure hydrogen pipe (52) connected with the medium-pressure hydrogen outlet pipe (435), a high-pressure hydrogen pipe (53) connected with the high-pressure hydrogen outlet pipe (445), and a vehicle hydrogenation pipe (54) respectively connected with the low-pressure hydrogen inlet pipe (51), the medium-pressure hydrogen inlet pipe (52) and the high-pressure hydrogen inlet pipe (53), wherein a hydrogenation pressure transmitter (541) is arranged on the vehicle hydrogenation pipe (54).
2. The sequential valve group control system according to claim 1, wherein: the number of the low-pressure hydrogen storage bottles (421) is three, the number of the medium-pressure hydrogen storage bottles (431) is two, and the number of the high-pressure hydrogen storage bottles (441) is one.
3. The sequential valve group control system according to claim 1, wherein: the number of the hydrogenation machines (5) is two.
4. The sequential valve group control system according to claim 1, wherein: the low-pressure hydrogen inlet valve (511) is arranged on the low-pressure hydrogen inlet pipe (51), the medium-pressure hydrogen inlet valve (521) is arranged on the medium-pressure hydrogen inlet pipe (52), and the high-pressure hydrogen inlet valve (531) is arranged on the high-pressure hydrogen inlet pipe (53).
5. A hydrogen compression hydrogenation method of a sequence valve group control system according to any one of the claims 1 to 4, characterized by comprising the following steps:
s1, the pressure of hydrogen when the hydrogen energy automobile is full is 35 Mpa; the low-pressure hydrogen storage bottle (421), the medium-pressure hydrogen storage bottle (431) and the high-pressure hydrogen storage bottle (441) are all in a hydrogen full state with the hydrogen pressure of 45 Mpa;
s2, opening a second low-pressure valve (424), and taking hydrogen from a low-pressure hydrogen storage bottle (421) by a hydrogenation machine (5); when the detection value of the low-pressure transmitter (423) is smaller than 43Mpa, opening the first low-pressure valve (422), and if the hydrogenation machine (5) does not take hydrogen from the low-pressure hydrogen storage bottle (421), closing the first low-pressure valve (422) when the detection value of the low-pressure transmitter (423) reaches 45 Mpa; if the hydrogenation machine (5) continues to take hydrogen from the low-pressure hydrogen storage bottle (421) and the detection value of the low-pressure transmitter (423) continues to become smaller, executing step S3;
s3, opening a second medium-pressure valve (343), and switching the hydrogenation machine (5) to take hydrogen from the medium-pressure hydrogen storage bottle (431); when the detection value of the medium pressure transmitter (433) is less than 43Mpa, the first low pressure valve (422) is closed and the first medium pressure valve (432) is opened, and the hydrogen pressure system (3) switches to supply hydrogen pressure to the medium pressure hydrogen storage bottle (431); if the hydrogenation machine (5) does not take hydrogen from the medium-pressure hydrogen storage bottle (431), closing the first medium-pressure valve (432) when the detection value of the medium-pressure transmitter (433) reaches 45Mpa, and opening the first low-pressure valve (422) until the detection value of the low-pressure transmitter (423) reaches 45Mpa, wherein the detection value of the low-pressure transmitter (423) is smaller than 43 Mpa; if the hydrogenation machine (5) continues to take hydrogen from the medium-pressure hydrogen storage bottle (431) and the detection value of the medium-pressure transmitter (433) continues to become smaller, executing step S4;
s4, opening a second high-pressure valve (444), and switching the hydrogenation machine (5) to take hydrogen from the high-pressure hydrogen storage bottle (441); when the detection value of the high-pressure transmitter (443) is smaller than 43Mpa, the first medium-pressure valve (432) is closed and the first high-pressure valve (442) is opened, and the hydrogen compression system (3) switches to compress hydrogen for the high-pressure hydrogen storage bottle (441); if the hydrogenation machine (5) does not take hydrogen from the high-pressure hydrogen storage bottle (441), closing the first high-pressure valve (442) when the detection value of the high-pressure transmitter (443) reaches 45Mpa, opening the first medium-pressure valve (432) and the first low-pressure valve (422) until the detection values of the medium-pressure transmitter (433) and the low-pressure transmitter (423) reach 45Mpa, wherein the detection values of the medium-pressure transmitter (433) and the low-pressure transmitter (423) are both smaller than 43 Mpa; if the hydrogenation machine (5) continues to take hydrogen from the high-pressure hydrogen storage bottle (441) and the detection value of the high-pressure transmitter (443) continues to become smaller, executing step S5;
s5, calculating the pressure difference between the detection value of the high-pressure transmitter (443) and the detection value of the hydrogenation pressure transmitter (541), if the pressure difference is smaller than the pipeline pressure loss value 2Mpa between the high-pressure hydrogen storage bottle (441) and the hydrogenation machine (5), closing the first high-pressure valve (442), and enabling the hydrogen system (3) to directly transmit hydrogen to the high-pressure hydrogen inlet pipe (53) of the hydrogenation machine (5) until the hydrogen energy automobile is filled with hydrogen.
6. The method of hydrogenating hydrogen under pressure according to claim 5, wherein: the hydrogen pressing system (3) further comprises a hydrogen pressing pressure transmitter (33), the hydrogen pressing pressure transmitter (33) is used for detecting the pressure of hydrogen flowing through the hydrogen pressing system (3), and if the detection value of the hydrogen pressing pressure transmitter (33) is larger than 45Mpa, the inner circulating valve (32) is opened, so that the hydrogen pressing machine (31) performs a self-circulation process; if the detection value of the hydrogen pressure transmitter (33) is less than 45Mpa, the internal circulating valve (32) is closed to increase the pressure of the hydrogen flowing through the hydrogen compression system (3).
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