CN115899551A - Hydrogen fills dress system - Google Patents
Hydrogen fills dress system Download PDFInfo
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- CN115899551A CN115899551A CN202211452176.1A CN202211452176A CN115899551A CN 115899551 A CN115899551 A CN 115899551A CN 202211452176 A CN202211452176 A CN 202211452176A CN 115899551 A CN115899551 A CN 115899551A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 337
- 239000001257 hydrogen Substances 0.000 title claims abstract description 336
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 336
- 238000003860 storage Methods 0.000 claims abstract description 151
- 238000005984 hydrogenation reaction Methods 0.000 claims abstract description 99
- 238000011084 recovery Methods 0.000 claims abstract description 32
- 150000002431 hydrogen Chemical group 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000010926 purge Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a hydrogen filling system, which comprises N hydrogen storage pipelines, wherein the N inlets of the hydrogen storage pipelines are connected with the outlets of a hydrogen compressor, and the outlets of the N hydrogen storage pipelines are correspondingly connected with hydrogen storage facilities one by one; hydrogen from a hydrogen source is pressurized by the hydrogen compressor and then enters a hydrogen storage facility through a hydrogen storage pipeline, and is sequentially filled from high to low according to the corresponding pressure value in the hydrogen storage facility; the N hydrogen storage facilities are respectively connected with the hydrogenation devices in a one-to-one correspondence way through the hydrogenation pipelines which respectively correspond to the N hydrogen storage facilities; n hydrogen storage facilities are respectively connected to the inlet of the hydrogen compressor through respective corresponding hydrogen recovery pipelines, and N is a positive integer greater than 1. The hydrogen filling system ensures that the hydrogen in the hydrogen storage facility can be recovered and fully utilized through the hydrogen recovery pipeline.
Description
Technical Field
The invention relates to the field of hydrogen filling, in particular to a hydrogen filling system.
Background
With the maturity of hydrogen powered vehicles, especially hydrogen fuel cell vehicles, the construction of hydrogen stations increases year by year. At present, the pressure grades for constructing the hydrogenation station are 45MPa and 90MPa, and the filling pressures are respectively 35MPa and 70MPa. The hydrogen station can be divided into three types, namely hydrogen production in the station, pipeline hydrogen transportation and long tube trailer hydrogen transportation according to the source of a hydrogen gas source. According to relevant national specifications and policies, hydrogen production in the station is not supported by the specifications, and only part of local policies of regions are supported; the hydrogen pipeline delivery limitation is large, the hydrogen pipeline delivery limitation is limited to places where hydrogen pipelines are opened, according to relevant domestic report statistics, the hydrogen pipelines exist in only a few domestic areas, the total mileage of the pipelines is short, and the construction of hydrogen station distribution cannot be supported; the hydrogen filling station in China mainly uses a long tube trailer to transport hydrogen to the hydrogen filling station without injecting, the hydrogen is transported to the hydrogen filling station through the long tube trailer, the hydrogen in the long tube trailer is transported to the hydrogen filling station by 20MPa hydrogen at the present stage, a compressor pumps the hydrogen in the long tube trailer to 5MPa to be subpackaged to a plurality of hydrogen storage facilities, and the long tube trailer is driven away from the hydrogen filling station to a gas source plant to refill the hydrogen.
In hydrogen charging, the hydrogen is usually charged by using the pressure difference between the hydrogen storage facility and the hydrogenation apparatus/hydrogenation machine. When the hydrogen storage pressure of the hydrogen storage facility of the hydrogen filling station is insufficient and the long tube trailer is driven away from the hydrogen filling station due to low pressure, the compressor has no air source input, and the pressure of the hydrogen storage facility in the station cannot be increased. Because the requirement on the hydrogenation pressure is higher during hydrogenation, if the hydrogenation pressure does not meet the requirement, potential safety hazards exist. Therefore, if the pressure difference between the hydrogen storage facility and the hydrogenation device/hydrogenation machine is not enough to support the filling of the hydrogen, the hydrogen filling station cannot replenish the hydrogen to the hydrogen storage facility to increase the pressure, so that the pressure difference between the hydrogen storage facility and the hydrogenation device/hydrogenation machine cannot be increased, and the filling of the hydrogen cannot be realized.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a hydrogen filling system.
In order to achieve the purpose, the invention provides a hydrogen filling system, which comprises N hydrogen storage pipelines, wherein the inlets of the hydrogen storage pipelines are connected with the outlets of a hydrogen compressor, and the outlets of the N hydrogen storage pipelines are correspondingly connected with hydrogen storage facilities one by one; hydrogen from a hydrogen source is pressurized by the hydrogen compressor and then enters a hydrogen storage facility through a hydrogen storage pipeline, and is sequentially filled from high to low according to the corresponding pressure value in the hydrogen storage facility;
the hydrogen storage facilities comprise a hydrogen sequence control device, the hydrogen sequence control device sets the outlets of the hydrogen storage facilities as high-pressure outlets, medium-pressure outlets and low-pressure outlets, each hydrogen storage facility is respectively connected with M hydrogenation pipelines, M is a positive integer, and the M hydrogenation pipelines are divided into high-pressure pipelines, medium-pressure pipelines and low-pressure pipelines and are arranged in one-to-one correspondence with the high-pressure outlets, the medium-pressure outlets and the low-pressure outlets; when the device is used, low-pressure input is adopted, when the low-pressure input does not meet the pressure requirement, the hydrogen sequence control device is switched to medium-pressure input, and when the low-pressure input does not meet the pressure requirement, the hydrogen sequence control device is switched to high-pressure input;
the N hydrogen storage facilities are respectively connected with hydrogenation devices in a one-to-one correspondence manner through respective corresponding hydrogenation pipelines; the N hydrogen storage facilities are respectively connected to the inlet of the hydrogen compressor through respective corresponding hydrogen recovery pipelines, and N is a positive integer greater than 1;
each hydrogen storage pipeline is provided with a first automatic valve; one end of the hydrogen storage pipeline close to the hydrogen storage facility is provided with a first pressure transmitter; a second automatic valve is arranged on the hydrogen recovery pipeline;
the signal output end of the first pressure transmitter is connected to the signal input end of a control module, the first automatic valve and the second automatic valve are both connected with the control module, and the control module controls the opening and closing of the first automatic valve and the second automatic valve.
The hydrogen filling system can better meet the requirement of hydrogenation pressure through the arrangement of the hydrogen sequence control device and high-pressure, medium-pressure and low-pressure pipelines, and simultaneously, the hydrogen recovery pipeline ensures that hydrogen in the hydrogen storage facility with insufficient pressure can be recovered and stored into other hydrogen storage facilities again for filling hydrogen when the pressure difference between the hydrogen storage facility and the hydrogenation device is insufficient to support the filling of the hydrogen and no additional gas source is input.
Preferred embodiments of the hydrogen filling system: the hydrogenation device is connected with the hydrogen sequence control device in a control mode, a third pressure sensor is arranged in the hydrogenation device, when the hydrogenation device carries out hydrogenation externally, the third pressure sensor collects hydrogenation pressure signals in real time and sends the signals to the controller of the hydrogenation device, and the controller of the hydrogenation device judges whether the pressure signals meet pressure requirements or not and controls the high-pressure pipeline, the medium-pressure pipeline and the low-pressure pipeline of the hydrogen sequence control device to open and close corresponding hydrogenation valves.
Preferred embodiments of the hydrogen filling system: the outlets of the N hydrogen recovery pipelines are gathered into a main pipeline, a pressure reducing valve is arranged on the main pipeline, and the outlet of the main pipeline is connected to the inlet of the hydrogen compressor. The preferred solution relieves the pressure burden at the inlet of the hydrogen compressor by the provision of a pressure reducing valve.
Preferred embodiments of the hydrogen filling system: the outlets of the N hydrogenation pipelines are converged into one outlet, and the outlet is connected to a hydrogenation device.
Preferred embodiments of the hydrogen filling system: when the hydrogenation device carries out external hydrogenation, the sequence of obtaining hydrogen by the hydrogenation device is to take gas from the low-pressure hydrogen storage facility, when the pressure of the low-pressure hydrogen storage facility cannot meet the pressure requirement, the hydrogenation device is switched to the medium-pressure hydrogen storage facility, and when the pressure of the medium-pressure hydrogen storage facility cannot meet the pressure requirement, the hydrogenation device is switched to the high-pressure hydrogen storage facility to take gas until the charged container is full;
when a hydrogen gas source is stably supplied, when the pressure of a hydrogen storage facility cannot meet the requirement on the external hydrogen pressure, a hydrogen compressor is started to fill the corresponding hydrogen storage facility, and when the set pressure is reached, the hydrogen compressor is automatically stopped;
and when the hydrogen gas source can not supply and needs to carry out external hydrogenation and the gas pressure in the hydrogen storage facility can not meet the requirement on the external hydrogenation pressure, starting the hydrogen compressor to carry out secondary compression on the hydrogen in the low-pressure hydrogen storage facility and recovering the hydrogen to the high-pressure hydrogen storage facility.
Preferred embodiment of the hydrogen filling system: a first automatic valve, a first check valve and a safety valve are sequentially arranged on each hydrogen storage pipeline along the hydrogen flowing direction during hydrogen storage;
the hydrogen recycling pipeline is sequentially provided with a second automatic valve and a second check valve along the hydrogen flowing direction during hydrogen recycling.
Preferred embodiments of the hydrogen filling system: the inlet of the hydrogen storage pipeline is also connected with a nitrogen purging pipeline. When the whole hydrogen filling system needs to be overhauled, nitrogen is filled from the inlet of the hydrogen storage pipeline through the nitrogen purging pipeline, and hydrogen in the hydrogen storage pipeline, the hydrogenation pipeline and the hydrogen recovery pipeline in the whole hydrogen filling system is purged.
Preferred embodiments of the hydrogen filling system: a first manual valve is arranged between the safety valve and the hydrogen storage pipeline. When the safety valve is overhauled or replaced, the corresponding first manual valve is closed.
Preferred embodiments of the hydrogen filling system: the control module comprises N first comparators, each first comparator corresponds to one first automatic valve, the inverting end of each first comparator is connected with the signal output end of the first pressure transmitter corresponding to the corresponding first automatic valve, the non-inverting end of each first comparator inputs a first pressure threshold value, the comparison result output end of each first comparator is correspondingly connected with the control end of the second automatic valve, and the comparison result output end of each first comparator is connected with the corresponding first automatic valve after being connected with a phase inverter. This preferred scheme simple structure can effectively realize retrieving hydrogen.
Preferred embodiments of the hydrogen filling system: and a second pressure transmitter is arranged in the hydrogen compressor, and the signal output end of the second pressure transmitter is connected to the signal input end corresponding to the control module. This ensures that hydrogen recovery is only initiated when there is insufficient hydrogen inventory at the hydroprocessing plant.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic piping diagram of a hydrogen filling system;
fig. 2 is a schematic block diagram of a hydrogen charging system;
FIG. 3 is a schematic circuit connection diagram of a first comparator;
FIG. 4 is a circuit connection schematic of a second comparator;
FIG. 5 is a control schematic block diagram of a hydrogen sequential control apparatus;
FIG. 6 is another control schematic block diagram of the hydrogen sequential control device; .
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
As shown in fig. 2, the present invention provides an embodiment of a hydrogen filling system. In this embodiment, the hydrogen filling system includes a hydrogen storage pipeline, a hydrogenation pipeline, and a hydrogen recovery pipeline; wherein, the hydrogen storage pipeline, the hydrogenation pipeline and the hydrogen recovery pipeline are all provided with N, and N is a positive integer larger than 1.
The inlets of the N hydrogen storage pipelines are connected with the outlets of the hydrogen compressor, and the outlets of the N hydrogen storage pipelines are correspondingly connected with hydrogen storage facilities one by one; and hydrogen from the hydrogen source is pressurized by the hydrogen compressor and then enters the hydrogen storage facility through the hydrogen storage pipeline, and is sequentially filled from high to low according to the corresponding pressure value in the hydrogen storage facility.
The N hydrogen storage facilities are respectively connected with the hydrogenation devices in a one-to-one correspondence way through the hydrogenation pipelines which respectively correspond to the N hydrogen storage facilities, and each hydrogenation pipeline is provided with a filter 6 for filtering hydrogen; the N hydrogen storage facilities are respectively connected to the inlet of the hydrogen compressor through the hydrogen recovery pipelines corresponding to the N hydrogen storage facilities. As shown in fig. 1, the case where all of the hydrogen storage line, the hydrogenation line, and the hydrogen recovery line are 3 is shown.
The hydrogen storage facilities comprise a hydrogen sequence control device, wherein the hydrogen sequence control device sets the outlets of the hydrogen storage facilities as high-pressure outlets, medium-pressure outlets and low-pressure outlets, each hydrogen storage facility is respectively connected with M hydrogenation pipelines, and the M hydrogenation pipelines are divided into high-pressure pipelines, medium-pressure pipelines and low-pressure pipelines and are arranged in one-to-one correspondence with the high-pressure outlets, the medium-pressure outlets and the low-pressure outlets; when the device is used, low-pressure input is firstly adopted, when the low-pressure input does not meet the pressure requirement, the hydrogen sequence control device is switched to medium-pressure input, and when the low-pressure input does not meet the pressure requirement, the hydrogen sequence control device is switched to high-pressure input. Specifically, as shown in fig. 5, the hydrogenation apparatus is in control connection with the hydrogen sequence control apparatus, a third pressure sensor is arranged in the hydrogenation apparatus, when the hydrogenation apparatus hydrogenates externally, the third pressure sensor collects a hydrogenation pressure signal in real time and sends the signal to the controller of the hydrogenation apparatus, and the controller of the hydrogenation apparatus determines whether the pressure signal meets the current hydrogenation pressure requirement, and controls the opening and closing of the corresponding hydrogenation valve on the high-pressure, medium-pressure and low-pressure pipeline on the hydrogen sequence control apparatus. As shown in fig. 6, the hydrogenation apparatus may also be connected to a control module, the control module is connected to a hydrogen sequential control apparatus in a control manner, a third pressure sensor is disposed in the hydrogenation apparatus, when the hydrogenation apparatus hydrogenates externally, the third pressure sensor collects a hydrogenation pressure signal in real time and sends the signal to a controller of the hydrogenation apparatus, the controller of the hydrogenation apparatus determines whether the pressure signal meets the current hydrogenation pressure requirement, and feeds back the determination result to the control module, and the control module controls the opening and closing of corresponding hydrogenation valves on high-pressure, medium-pressure and low-pressure pipelines on the hydrogen sequential control apparatus according to information fed back by the hydrogenation apparatus. The current hydrogenation pressure requirement is obtained when a hydrogenation bottle two-dimensional code or other ID and identity marks are scanned before hydrogenation of the hydrogenation device. The hydrogen sequence control device can be a plurality of groups of controllable switches or a singlechip.
A first automatic valve 1 is arranged on each hydrogen storage pipeline, a first pressure transmitter 5 is arranged at one end of each hydrogen storage pipeline close to the hydrogen storage facility, and the pressure of hydrogen in the hydrogen storage facility is detected in real time; a second automatic valve 7 is arranged on the hydrogen recovery pipeline; the hydrogenation device is provided with a valve for opening or closing hydrogenation.
The signal output end of each pressure transmitter is respectively connected to the corresponding signal input end of the control module, the first automatic valve 1 and the second automatic valve 7 are respectively connected with the control module, and the control module controls the opening and closing of the first automatic valve 1 and the second automatic valve 7.
Specifically, when hydrogen is stored from a hydrogen gas source to the hydrogen storage facility, the control module controls the opening and closing of the first automatic valve 1 on each hydrogen storage pipeline according to the gas pressure value acquired by the first pressure transmitter 5 on each hydrogen storage pipeline and the principle that the gas pressure value in the hydrogen storage facility is filled from high to low in sequence.
When hydrogenation is needed, a valve of the hydrogenation device is controlled to be opened, and hydrogen filling of equipment to be hydrogenated (such as a hydrogen cylinder) is realized through the pressure difference between the hydrogen storage facility and the hydrogenation device.
When the pressure signal acquired by the first pressure transmitter 5 corresponding to any hydrogen storage facility is lower than the set first pressure threshold, the control module controls the second automatic valve 7 on the hydrogen recovery pipeline corresponding to the hydrogen storage facility to be opened, recovers the hydrogen in the hydrogen storage facility through the hydrogen compressor and the hydrogen recovery pipeline, controls the first automatic valve 1 on the hydrogen storage pipeline corresponding to the hydrogen storage facility to be closed, and supplements the recovered hydrogen into other hydrogen storage facilities. After the operation, the hydrogen in the hydrogen storage facility with the pressure lower than the first pressure threshold is recovered and supplied to other hydrogen storage facilities, so that the hydrogen in the hydrogen storage facility with the pressure lower than the first pressure threshold can be recovered and fully utilized, and the hydrogen in the hydrogen storage facility with the pressure lower than the first pressure threshold can also be used for hydrogen filling. The control method involved here may be any one of the existing methods, and the control module may adopt the existing method to judge whether the pressure signal collected by the first pressure transmitter 5 is lower than the set first pressure threshold, or may realize the judgment by setting a first comparator in the control module, as shown in fig. 3, each first comparator corresponds to one first automatic valve 1, the inverting terminal of each first comparator is connected to the signal output terminal of the first pressure transmitter 5 corresponding to the corresponding first automatic valve 1, the non-inverting terminal of each first comparator inputs the first pressure threshold, the comparison result output terminal of each first comparator is respectively connected to the control terminal of the second automatic valve 7, and the comparison result output terminal of each first comparator is connected to the corresponding first automatic valve 1 after being connected to an inverter (such as a non-gate); when the pressure signal collected by any one first pressure transmitter 5 is lower than a first pressure threshold value, the corresponding first comparator outputs a high level to control the corresponding second automatic valve 7 to be opened and the corresponding first automatic valve 1 to be closed; when the pressure signal collected by any one of the first pressure transmitters 5 is higher than the first pressure threshold, the corresponding first comparator outputs a low level to control the corresponding second automatic valve 7 to close and the corresponding first automatic valve 1 to open.
In order to ensure that whether the pressure value of the inlet of the hydrogen compressor meets the requirement or not, a second pressure transmitter is arranged at the inlet of the hydrogen compressor, the signal output end of the second pressure transmitter is connected to the signal input end corresponding to the control module, the pressure of the recovered hydrogen is detected during hydrogen recovery, and the control module controls the hydrogen recovery only when the pressure signal acquired by the second pressure transmitter is lower than a second pressure threshold value, wherein the second pressure threshold value corresponds to the required value of the pressure of the inlet of the hydrogen compressor. The related methods all adopt the existing methods, and the control module can adopt the existing methods to judge when judging whether the pressure signal collected by the second pressure transmitter is lower than the set second pressure threshold, or can realize the judgment by arranging a second comparator in the control module, as shown in fig. 4, the enabling ends of all the first comparators are uniformly connected with a control switch, the positive phase end of the second comparator inputs the second pressure threshold, the negative phase end of the second comparator is connected with the signal output end of the second pressure transmitter, and the comparison result output end of the second comparator is connected with the control switch to control the on-off of the control switch, so that the control module can control whether to recover hydrogen; when the pressure signal acquired by the second pressure transmitter is lower than a second pressure threshold value, the second comparator outputs a high level, the control switch is controlled to be closed, and hydrogen recovery is maintained; when the pressure signal collected by the second pressure transmitter is higher than the second pressure threshold, the second comparator outputs low level, the control switch is controlled to be switched on, and hydrogen recovery is not carried out.
This embodiment also has the preferred embodiment: the outlets of the N hydrogen recovery pipelines are gathered into a main pipeline, a pressure reducing valve 9 is arranged on the main pipeline, and the outlet of the main pipeline is connected to the inlet of the hydrogen compressor.
This embodiment has another preferred embodiment: the outlets of the N hydrogenation pipelines are converged into one outlet, and the outlet is connected to the hydrogenation device. When the hydrogenation device carries out external hydrogenation, the sequence of obtaining hydrogen by the hydrogenation device is that gas is firstly obtained from a low-pressure hydrogen storage facility, when the pressure of the low-pressure hydrogen storage facility cannot meet the pressure requirement, the low-pressure hydrogen storage facility is switched to a medium-pressure hydrogen storage facility, when the pressure of the medium-pressure hydrogen storage facility cannot meet the pressure requirement, the high-pressure hydrogen storage facility is switched to obtain gas until a charged container (such as a hydrogenation bottle) is filled, and the pressure of the hydrogen storage facility can be obtained by a first pressure transmitter.
When a hydrogen gas source is stably supplied, when the pressure of the hydrogen storage facility can not meet the requirement on the external hydrogen pressure, the hydrogen compressor is started to fill the corresponding hydrogen storage facility, and when the pressure reaches the set pressure, the hydrogen compressor is automatically stopped.
When the hydrogen gas source can not supply and needs to perform external hydrogenation, and the gas pressure in the hydrogen storage facility can not meet the requirement on the external hydrogenation pressure, namely the pressure signal acquired by the first pressure transmitter is lower than the current hydrogenation pressure requirement, the hydrogen compressor is started to perform secondary compression on the hydrogen in the low-pressure hydrogen storage facility and recover the hydrogen into the high-pressure hydrogen storage facility.
Specifically, gas of a low-pressure hydrogen storage facility is selected to be recovered, the low-pressure hydrogen storage facility is controlled to be opened corresponding to a second automatic valve, hydrogen reaches the inlet pressure requirement of a hydrogen compressor after being decompressed, the hydrogen compressor is started to compress the gas, the compressed gas is filled into the high-pressure hydrogen storage facility at first, a control module controls a hydrogenation valve on a hydrogenation pipeline corresponding to the high-pressure hydrogen storage facility to be opened, the high-pressure hydrogen storage facility supplies gas to a charged container, and the charged container can be filled when external hydrogenation is carried out.
If the gas recovered from the low-pressure hydrogen storage facility cannot meet the compressed gas pressure requirement, the control module closes the recovery pipeline of the low-pressure hydrogen storage container, switches to the hydrogen recovery pipeline corresponding to the medium-pressure hydrogen storage facility, opens the corresponding second automatic valve, recovers the gas and fills the gas into the high-pressure hydrogen storage facility, so as to ensure that the charged container can be filled when the high-pressure hydrogen storage facility externally hydrogenates.
And if the gas recovery of the low-pressure hydrogen storage facility and the medium-pressure hydrogen storage facility can not meet the requirement of external gas filling pressure, switching to the gas recovery of the high-pressure hydrogen storage facility until the filled container is full.
When the gas to be recovered does not need to enter the recovered hydrogen storage facility again, the first automatic valve of the hydrogen storage pipeline corresponding to the hydrogen storage facility is closed.
The whole process is controlled by the control module, and the recovery process is given by the control module to operate according to a set logic control principle.
This embodiment has another preferred embodiment: every stores up hydrogen flow direction and sets gradually first automatic valve 1, first check valve 2 and relief valve 3 when hydrogen storage on the pipeline, still can set up the manometer on every stores up hydrogen pipeline, between relief valve 3 and the hydrogen storage pipeline, between first pressure transmitter 5 and the hydrogen storage pipeline, between manometer and the hydrogen storage pipeline all can set up first manual valve 4. When the safety valve 3, the first pressure transmitter 5 and the pressure gauge are overhauled or replaced, the corresponding first manual valves 4 are closed; and a second automatic valve 7 and a second check valve 8 are sequentially arranged on each hydrogen recovery pipeline along the hydrogen flow direction during hydrogen recovery.
This embodiment has another preferred embodiment: the inlet of the hydrogen storage pipeline is also connected with a nitrogen purging pipeline, a second manual valve 11 and a third check valve 10 are arranged on the nitrogen purging pipeline along the flow direction of nitrogen, when the whole hydrogen filling system needs to be overhauled, the second manual valve 11 is opened, nitrogen is filled from the inlet of the hydrogen storage pipeline through the nitrogen purging pipeline, and the pipeline in the whole hydrogen filling system and hydrogen in the equipment are replaced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A hydrogen filling system is characterized by comprising N hydrogen storage pipelines with inlets connected with outlets of a hydrogen compressor, wherein the outlets of the N hydrogen storage pipelines are connected with hydrogen storage facilities in a one-to-one correspondence manner; hydrogen from a hydrogen source is pressurized by the hydrogen compressor and then enters a hydrogen storage facility through a hydrogen storage pipeline, and is sequentially filled from high to low according to the corresponding pressure value in the hydrogen storage facility;
the N hydrogen storage facilities are respectively connected with hydrogenation devices in a one-to-one correspondence manner through respective corresponding hydrogenation pipelines; the N hydrogen storage facilities are respectively connected to the inlet of the hydrogen compressor through respective corresponding hydrogen recovery pipelines, and N is a positive integer greater than 1;
the hydrogen storage facilities comprise a hydrogen sequence control device, the hydrogen sequence control device sets the outlets of the hydrogen storage facilities as high-pressure outlets, medium-pressure outlets and low-pressure outlets, each hydrogen storage facility is respectively connected with M hydrogenation pipelines, M is a positive integer, and the M hydrogenation pipelines are divided into high-pressure pipelines, medium-pressure pipelines and low-pressure pipelines and are arranged in one-to-one correspondence with the high-pressure outlets, the medium-pressure outlets and the low-pressure outlets; when the device is used, low-pressure input is adopted, when the low-pressure input does not meet the pressure requirement, the hydrogen sequence control device is switched to medium-pressure input, and when the low-pressure input does not meet the pressure requirement, the hydrogen sequence control device is switched to high-pressure input;
each hydrogen storage pipeline is provided with a first automatic valve; one end of the hydrogen storage pipeline close to the hydrogen storage facility is provided with a first pressure transmitter; a second automatic valve is arranged on the hydrogen recovery pipeline;
the signal output end of the first pressure transmitter is connected to the signal input end of a control module, the first automatic valve and the second automatic valve are both connected with the control module, and the control module controls the opening and closing of the first automatic valve and the second automatic valve.
2. The hydrogen filling system according to claim 1, wherein the hydrogenation apparatus is in control connection with the hydrogen sequence control apparatus, a third pressure sensor is provided in the hydrogenation apparatus, when the hydrogenation apparatus hydrogenates the hydrogen externally, the third pressure sensor collects a hydrogenation pressure signal in real time and sends the signal to the controller of the hydrogenation apparatus, and the controller of the hydrogenation apparatus determines whether the pressure signal meets the pressure requirement and controls the opening and closing of the corresponding hydrogenation valve on the high-pressure, medium-pressure and low-pressure pipeline on the hydrogen sequence control apparatus.
3. The hydrogen filling system according to claim 1, wherein the outlets of the N hydrogen recovery lines are merged into a main line on which a pressure reducing valve is provided, and the outlet of the main line is connected to the inlet of the hydrogen compressor.
4. The hydrogen filling system according to claim 1, wherein the outlets of the N hydrogenation lines merge into one outlet, and the outlet is connected to a hydrogenation device.
5. The hydrogen charging system according to claim 4, wherein when the hydrogenation device is used for externally hydrogenating, the hydrogenation device is used for obtaining hydrogen in a sequence of firstly taking gas from the low-pressure hydrogen storage facility, when the pressure of the low-pressure hydrogen storage facility cannot be met, the low-pressure hydrogen storage facility is switched to the medium-pressure hydrogen storage facility, and when the pressure of the medium-pressure hydrogen storage facility cannot be met, the high-pressure hydrogen storage facility is switched to take gas until the charged container is full;
when a hydrogen gas source is stably supplied, when the pressure of a hydrogen storage facility can not meet the requirement on the external hydrogen pressure, a hydrogen compressor is started to fill the corresponding hydrogen storage facility, and when the pressure reaches a set pressure, the hydrogen compressor is automatically stopped;
and when the hydrogen gas source can not supply and needs to carry out external hydrogenation and the gas pressure in the hydrogen storage facility can not meet the requirement on the external hydrogenation pressure, starting the hydrogen compressor to carry out secondary compression on the hydrogen in the low-pressure hydrogen storage facility and recovering the hydrogen to the high-pressure hydrogen storage facility.
6. A hydrogen charging system according to claim 1, wherein a first automatic valve, a first check valve and a safety valve are provided in each of the hydrogen storage pipes in this order in a hydrogen flow direction during hydrogen storage;
and a second automatic valve and a second check valve are sequentially arranged on the hydrogen recovery pipeline along the hydrogen flow direction during hydrogen recovery.
7. A hydrogen charging system according to claim 1, wherein a nitrogen purge line is further connected to the inlet of the hydrogen storage line.
8. A hydrogen filling system according to claim 3, wherein a first manual valve is provided between the safety valve and the hydrogen storage line.
9. The hydrogen filling system according to claim 1, wherein the control module comprises N first comparators, each first comparator corresponds to one of the first automatic valves, the inverting terminal of each first comparator is connected to the signal output terminal of the first pressure transmitter corresponding to the corresponding first automatic valve, the inverting terminal of each first comparator inputs the first pressure threshold, the comparison result output terminal of each first comparator is connected to the control terminal of the second automatic valve, and the comparison result output terminal of each first comparator is connected to the corresponding first automatic valve after being connected to an inverter.
10. The hydrogen filling system according to claim 1 or 9, wherein a second pressure transmitter is provided in the hydrogen compressor, and a signal output end of the second pressure transmitter is connected to a corresponding signal input end of the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211452176.1A CN115899551B (en) | 2022-11-18 | 2022-11-18 | Hydrogen filling system |
Applications Claiming Priority (1)
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| DE102007023821A1 (en) * | 2007-05-21 | 2008-11-27 | Bayerische Motoren Werke Aktiengesellschaft | Method for filling cryogenic hydrogen tank on vehicle has residual gas tapped off to be conditioned at lower temperature before returning to cool the tank prior to filling with fresh gas |
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| CN115899551B (en) | 2023-11-14 |
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