CN214171944U - Hydrogen gas discharging system - Google Patents
Hydrogen gas discharging system Download PDFInfo
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- CN214171944U CN214171944U CN202022257186.2U CN202022257186U CN214171944U CN 214171944 U CN214171944 U CN 214171944U CN 202022257186 U CN202022257186 U CN 202022257186U CN 214171944 U CN214171944 U CN 214171944U
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000007599 discharging Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 86
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 239000001257 hydrogen Substances 0.000 abstract description 43
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 43
- 238000005984 hydrogenation reaction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 230000008901 benefit Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 150000002431 hydrogen Chemical class 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to a hydrogen gas system of unloading. The hydrogen gas unloading system comprises: the first tube bank vehicle is connected with the branch, the main gas unloading path, the auxiliary gas unloading path, the first channel, the second channel, the first valve and the second valve; a high-pressure compressor is arranged in the gas discharge main path; the gas discharge auxiliary path is internally provided with a low-pressure compressor, and one end of the gas discharge auxiliary path positioned at the downstream of the low-pressure compressor is connected to the gas inlet of the high-pressure compressor; the first channel is communicated with the first tube bank vehicle connecting branch and one end of the main gas unloading path, which is positioned at the upstream of the high-pressure compressor; the second channel is communicated with the first tube bank vehicle connecting branch and one end of the gas unloading auxiliary road, which is positioned at the upstream of the low-pressure compressor; the first valve is arranged on the gas unloading main path or the first channel; the second valve is arranged on the gas discharging auxiliary path or the second channel; the control unit is connected with the first valve and the second valve in a control mode. When the pressure of the tube bundle vehicle is reduced to below 7.5Mpa, hydrogen firstly enters the low-pressure compressor to be pressurized to a certain degree and then enters the high-pressure compressor, so that the utilization rate of the hydrogen is greatly improved.
Description
Technical Field
The utility model relates to a hydrogenation station equipment field, concretely relates to hydrogen system of unloading.
Background
The fuel cell automobile has become an important direction for the development of new energy automobiles due to the advantages of high efficiency, zero emission and the like. The hydrogen is transported to a hydrogenation station for storage through a tube bundle vehicle after being manufactured in a hydrogen source factory, and then is sent to a hydrogenation machine for hydrogenation of the fuel cell vehicle.
The utility model discloses a chinese utility model patent that the bulletin number is CN211399315U discloses a hydrogenation station is with column and hydrogen system of unloading, this hydrogen system of unloading is including the column of unloading and with the compressor or the hydrogenation machine that the column is connected of unloading, the column of unloading includes two mutually independent tube bank cars connect the branch road and with two tube bank cars connect the main road of unloading of branch road intercommunication, the low reaches of the main road of unloading are connected with two branches of unloading, one of them branch road of unloading is connected to the hydrogenation machine, another branch road of unloading is connected to the compressor. When the hydrogen gas unloading system is used, the two tube bundle vehicle connecting branches can be connected with two tube bundle vehicles, when one tube bundle vehicle cannot continuously supply hydrogen, the other tube bundle vehicle can replace the hydrogen supply, hydrogen gas can directly enter a hydrogenation machine to hydrogenate the vehicle, and the hydrogen gas can also enter a compressor to be pressurized and then is stored in a gas storage tank.
The problem that current hydrogen unloads gas system exists lies in: the compressor that hydrogenation station used is generally the diaphragm compressor that the discharge pressure is 45Mpa, requires that the inlet pressure can not be less than 7.5Mpa, otherwise can cause the problem that high-pressure compressor pressurization rate is too low and exhaust temperature is too high, and the full pressure of tube bank car is 20Mpa usually, so, the hydrogen in the 7.5 ~ 20Mpa pressure interval in the tube bank car can get into high-pressure compressor smoothly and be utilized, and the hydrogen residual gas of pressure below 7.5Mpa will not be utilized, therefore cause the hydrogen utilization ratio in the tube bank car to be only 59.6%.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydrogen system of unloading to solve the problem that the tube bank car hydrogen utilization ratio is low that current hydrogen system of unloading exists.
In order to achieve the above purpose, the utility model discloses hydrogen unloads the technical scheme that the gas system provided and is:
a hydrogen gas discharge system comprising:
the first tube bank vehicle is connected with the branch and the main gas unloading path;
the first tube bundle trolley connecting branch is provided with a first tube bundle trolley connector used for connecting the tube bundle trolley;
a high-pressure compressor is arranged in the gas discharge main path;
further comprising:
the gas discharging auxiliary path is internally provided with a low-pressure compressor, and one end of the gas discharging auxiliary path positioned at the downstream of the low-pressure compressor is connected to the gas inlet of the high-pressure compressor;
the first channel is communicated with the first tube bank vehicle connecting branch and one end, located at the upstream of the high-pressure compressor, of the main gas unloading path;
the second channel is communicated with the first tube bank vehicle connecting branch and one end, located at the upstream of the low-pressure compressor, of the gas unloading auxiliary road;
the first valve is arranged on the gas unloading main path or the first channel and used for communicating or disconnecting the connection between the first tube bundle vehicle connection branch and the gas unloading main path;
the second valve is arranged on the gas unloading auxiliary road or the second channel and is used for communicating or disconnecting the connection of the first tube bank vehicle connection branch and the gas unloading auxiliary road;
the hydrogen gas unloading system also comprises a control unit, wherein the control unit is in control connection with the first valve and the second valve, the hydrogen gas of the connecting branch of the first tube bank vehicle can realize pressurization through two different paths by controlling the opening and closing of the first valve and the second valve, the first path is that the hydrogen gas directly enters a high-pressure compressor in the gas unloading main path from the first channel, and the second path is that the hydrogen gas firstly enters a low-pressure compressor in the gas unloading auxiliary path from the second channel and then enters the high-pressure compressor after pressurization.
Has the advantages that: through addding the gas discharge auxiliary road, can change according to the interior hydrogen pressure of tube bank car and switch the route of discharging gas: in the initial stage, the pressure of the tube bundle vehicle is higher than 7.5Mpa, and the control unit controls the first valve to be opened and the second valve to be closed, so that hydrogen in the tube bundle vehicle directly enters a high-pressure compressor in a gas discharge main path through the first channel, and is stored after being pressurized to a certain degree; along with the gas unloading process, the pressure of the tube bundle vehicle is gradually reduced, when the pressure is reduced to be below 7.5Mpa, the control unit controls the first valve to be closed and the second valve to be opened, so that hydrogen firstly enters the low-pressure compressor in the gas unloading auxiliary road from the second channel, is pressurized to a certain degree by the low-pressure compressor and then enters the high-pressure compressor in the gas unloading main road, and is stored after being further pressurized. Therefore, the residual gas of the tube bundle vehicle with the pressure below 7.5Mpa can be effectively utilized, and the utilization rate of hydrogen is greatly improved.
Further, the hydrogen gas unloading system also comprises a second tube bundle vehicle connecting branch, a third channel and a fourth channel; a second pipe bundle vehicle joint for connecting the pipe bundle vehicle is arranged on the second pipe bundle vehicle connecting branch; the third channel is communicated with the second tube bank vehicle connecting branch and one end of the main gas unloading path, which is positioned at the upstream of the high-pressure compressor; the fourth channel is communicated with the second tube bank vehicle connecting branch and one end, located at the upstream of the low-pressure compressor, of the gas unloading auxiliary road; the third channel is provided with a third valve for communicating or disconnecting the connection of the second tube bundle vehicle connection branch and the gas discharge main path; a fourth valve is arranged on the fourth channel and used for connecting or disconnecting the connection between the second tube bundle vehicle connection branch and the gas unloading auxiliary road, and the third valve and the fourth valve are in control connection with the control unit; the first valve is arranged in the first channel, and the second valve is arranged in the second channel.
Has the advantages that: when the pressure of the tube bundle vehicle is reduced to below 7.5Mpa, the high-pressure compressor needs to be shut down firstly, the low-pressure compressor is started to pressurize the residual gas of the tube bundle vehicle, the high-pressure compressor is opened after the pressure is increased to a certain degree, when one tube bundle vehicle is used, the high-pressure compressor needs to be shut down firstly, the high-pressure compressor and the low-pressure compressor are both diaphragm compressors, the service life of a compressor diaphragm can be shortened when the high-pressure compressor and the low-pressure compressor are started and stopped frequently, the second tube bundle vehicle connecting branch is additionally arranged to form mutually independent double gas discharge pipelines with the first tube bundle vehicle connecting branch, two tube bundle vehicle connecting branches are respectively connected with one tube bundle vehicle, so that when the pressure of one tube bundle vehicle is reduced to below 7.5Mpa, the high-pressure compressor does not need to be shut down, the other tube bundle vehicle can be directly switched to the gas source of the high-pressure compressor to continue gas supply through the control of the valve, when one tube bundle vehicle is used, when the tube bundle vehicles need to be switched, the purpose that the high-pressure compressor and the low-pressure compressor do not stop can be realized by controlling the opening and closing of the first valve, the second valve, the third valve and the fourth valve, so that the starting and stopping times of the compressor are greatly reduced, and the service life of a compressor diaphragm is prolonged.
Furthermore, a low-pressure buffer tank is connected in series with the downstream of the low-pressure compressor in the gas discharge auxiliary circuit, a fifth valve is arranged on the downstream of the low-pressure buffer tank, and the fifth valve is in control connection with the control unit.
Has the advantages that: the hydrogen after being pressurized by the low-pressure compressor is stored in the low-pressure buffer tank, and the control unit controls the fifth valve to be opened when the low-pressure buffer tank is pressurized to full pressure, so that the low-pressure buffer tank starts to be used as an air source of the high-pressure compressor for air supply, and the low-pressure compressor can continuously operate without being shut down when the low-pressure buffer tank is pressurized to full pressure, thereby prolonging the service life of a diaphragm of the low-pressure compressor.
Further, a first one-way valve is further arranged in the air discharging auxiliary path at the downstream of the fifth valve.
Has the advantages that: when one of them tube bank car switches over the air supply for low pressure compressor, when another tube bank car carried out the air feed as high pressure compressor's air supply simultaneously, hydrogen in the higher tube bank car of pressure can be anti-cluster to the low pressure buffer tank in, lead to the compression ratio increase of low pressure compressor, efficiency reduces, causes the residual air utilization ratio reduction of the lower tube bank car of pressure, sets up first check valve through the low reaches at the fifth valve, can avoid high-pressure hydrogen anti-cluster to the low pressure buffer tank in.
Furthermore, a second one-way valve is further arranged in the main gas unloading path and is positioned at the upstream of the connection position of one end of the downstream of the auxiliary gas unloading path and the main gas unloading path.
Has the advantages that: the reduction of residual gas utilization rate caused by the fact that pressurized hydrogen is reversely connected to the pipe bundle vehicle when reaching the air inlet of the high-pressure compressor is avoided.
Drawings
FIG. 1 is a schematic flow diagram of a hydrogen gas discharge system of the utility model;
FIG. 2 is a schematic diagram comparing the pressurization rates of a high pressure compressor and a low pressure compressor;
in the figure: 1-air discharge hose; 2-a filter; 3-an emptying valve; 4-a pressure transmitter; 5-needle valve; 11-a first pneumatic valve; 12-a second pneumatic valve; 13-a third pneumatic valve; 14-a fourth pneumatic valve; 15-a fifth pneumatic valve; 16-a first one-way valve; 17-a second one-way valve; 101-a first tube bundle vehicle connecting branch; 102-a first channel; 103-a second channel; 201-a second tube bundle vehicle connecting branch; 202-a third channel; 203-a fourth channel; 301-main gas discharge path; 302-air discharge auxiliary road.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses a hydrogen unloads gas system's embodiment 1:
as shown in fig. 1, the hydrogen gas unloading system includes a first tube bundle vehicle connecting branch 101, a second tube bundle vehicle connecting branch 201, a gas unloading main path 301, and a gas unloading auxiliary path 302.
The first tube bundle trolley connecting branch 101 is provided with a first tube bundle trolley joint for connecting the tube bundle trolley. The downstream of the first tube bundle vehicle connecting branch 101 is divided into a first channel and a second channel, and the first channel and the second channel are respectively communicated with air inlets of the air unloading main path 301 and the air unloading auxiliary path 302. A first pneumatic valve 11 is arranged in the first channel 102 and is used for connecting or disconnecting the first tube bundle vehicle connecting branch 101 with the main air discharge path 301; the second passage 103 is provided with a second pneumatic valve 12 for connecting or disconnecting the first tube bank vehicle connection branch 101 with the air discharge auxiliary path 302.
And a second tube bundle trolley joint for connecting the tube bundle trolley is arranged on the second tube bundle trolley connecting branch 201. The downstream of the second tube bundle vehicle connecting branch 201 is divided into a third channel and a fourth channel, and the third channel and the fourth channel are respectively communicated with air inlets of the air unloading main path 301 and the air unloading auxiliary path 302. A third pneumatic valve 13 is arranged in the third channel 202 and is used for communicating or disconnecting the connection between the second tube bundle vehicle connecting branch 201 and the main air discharge path 301; a fourth pneumatic valve 14 is arranged in the fourth channel 203 and used for connecting or disconnecting the second tube bundle vehicle connecting branch 201 with the air discharging auxiliary path 302.
The first tube bank vehicle and the second tube bank vehicle are connected with an air unloading hose 1, a filter 2, an emptying valve 3, a pressure transmitter 4 and a needle valve 5 in series along the air flow direction in a connecting branch.
The second check valve 17, the high-pressure compressor and the high-pressure buffer tank are connected in series in the main gas discharge path 301 along the direction of gas flow. The set exhaust pressure of the high-pressure compressor is 45MPa, the set intake pressure is not less than 7.5MPa, and the set pressure of the high-pressure buffer tank is 45 MPa. And the gas outlet of the high-pressure buffer tank is communicated with the hydrogenation machine and is used for filling hydrogen for the fuel cell automobile.
The downstream end of the gas discharge auxiliary path 302 is communicated with the air inlet of the high-pressure compressor, and the low-pressure compressor, the low-pressure buffer tank, the fifth pneumatic valve 15 and the first one-way valve 16 are sequentially connected in series in the gas discharge auxiliary path 302 along the air flow direction. The set exhaust pressure of the low-pressure compressor is 20Mpa, the set intake pressure of the low-pressure compressor is 2-7.5 Mpa, and the set pressure of the low-pressure buffer tank is 20 Mpa.
The hydrogen gas discharging system also comprises a control unit, the control unit is in control connection with each pneumatic valve, and the opening and closing states of each pneumatic valve are controlled according to set conditions.
Through addding the gas discharge auxiliary road 302, can switch the route of unloading according to tube bank car pressure variation: when the pressure of the tube bundle vehicle is higher than 7.5Mpa, the hydrogen in the tube bundle vehicle directly enters a high-pressure compressor in a gas discharge main path, and is stored in a high-pressure buffer tank after being pressurized to 45 Mpa; when the pressure of the tube bundle vehicle is reduced to be below 7.5Mpa, the residual gas of the tube bundle vehicle firstly enters the low-pressure compressor in the gas unloading auxiliary path 302, is pressurized by the low-pressure compressor and then enters the high-pressure compressor to meet the gas inlet requirement of the high-pressure compressor, so that the residual gas of the tube bundle vehicle with the pressure below 7.5Mpa can be effectively utilized, the hydrogen utilization rate of the tube bundle vehicle is increased to 88.9% from 59.6%, and the hydrogen utilization rate of the tube bundle vehicle is greatly improved.
The first pipe bundle vehicle connecting branch and the second pipe bundle vehicle connecting branch can be respectively connected with one pipe bundle vehicle, when the pressure of one pipe bundle vehicle is reduced to be below 7.5Mpa, the high-pressure compressor is not required to be shut down, and the other pipe bundle vehicle can be directly switched to an air source of the high-pressure compressor for continuous air supply by controlling the opening and closing of the first pneumatic valve, the second pneumatic valve, the third pneumatic valve and the fourth pneumatic valve; when the residual air of a pipe bundle vehicle is utilized and the pipe bundle vehicle needs to be switched, the purpose that the high-pressure compressor and the low-pressure compressor do not stop can be achieved by controlling the first pneumatic valve, the second pneumatic valve, the third pneumatic valve and the fourth pneumatic valve to be opened and closed, so that the starting and stopping times of the compressor are greatly reduced, and the service life of a compressor diaphragm is prolonged.
Through setting up fifth pneumatic valve 15 in low pressure buffer tank low reaches, fifth pneumatic valve 15 opens when low pressure buffer tank rises to full pressure, makes the low pressure buffer tank begin to carry out the air feed as high pressure compressor's air supply, need not shut down low pressure compressor, makes low pressure compressor can continuous operation to the life-span of low pressure compressor diaphragm has been prolonged.
Through set up first check valve 16 in the low reaches of fifth pneumatic valve 15, can avoid the high-pressure hydrogen in the higher tube bank car of pressure to anti-cluster to the low pressure buffer tank in, lead to the compression ratio increase of low pressure compressor, efficiency reduces, causes the residual air utilization ratio reduction of the lower tube bank car of pressure.
In this embodiment, the low-pressure compressor is selected to be "400 kg/12h @3.5 MPa", so that the selection has the advantages that: (1) for a 1000 kg three-stage hydrogen station, 3 tube bundle vehicles are consumed every day, the hydrogen treatment capacity of a low-pressure compressor every day is required to be 314 kg, and the specification meets the treatment capacity requirement; (2) in the process that the high-pressure compressor pressurizes for the low-pressure buffer tank and the low-pressure compressor pressurizes for the tube bank car residual air simultaneously, the pressurization rate that this specification can guarantee the high-pressure compressor is greater than the pressurization rate of low-pressure compressor all the time, as shown in figure 2 to avoid the low-pressure buffer tank frequently to appear the full pressure operating mode, improve the reliability of low-pressure compressor.
The specific control process of the hydrogen gas unloading system is as follows:
step 1: and a full-pressure tube bundle vehicle a and a full-pressure tube bundle vehicle b are parked in the hydrogenation station, the full-pressure is 20Mpa, and the tube bundle vehicle a and the tube bundle vehicle b are respectively connected with the first tube bundle vehicle branch and the second tube bundle vehicle branch. The control unit controls to enter a first air supply mode: the first pneumatic valve 11 is opened, and the second, third, fourth and fifth pneumatic valves are closed, so that the tube bundle vehicle a is used as a main working vehicle to supply hydrogen, hydrogen in the tube bundle vehicle a enters a gas discharge main path through the first channel 102, and is pressurized to 45Mpa by the high-pressure compressor and then flows to a hydrogenation machine to hydrogenate the vehicle.
Step 2: when the pressure transmitter 4 detects that the pressure of the tube bundle vehicle a is reduced to below 7.5Mpa but higher than 2Mpa, the control unit controls to enter a second air supply mode, and the second air supply mode is divided into the following three steps 2.1-2.3:
2.1, a pressure sensor of the low-pressure buffer tank continuously detects the pressure of the low-pressure buffer tank and transmits a pressure signal to a control unit, when the pressure of the low-pressure buffer tank is less than 20Mpa, the control unit controls a second pneumatic valve 12 and a third pneumatic valve 13 to be opened, a first pneumatic valve 11, a fourth pneumatic valve 14 and a fifth pneumatic valve 15 to be closed, so that the residual gas of a tube bundle vehicle a enters an air-discharging auxiliary path through a second channel 103, is pressurized to 20Mpa by a low-pressure compressor and then enters the low-pressure buffer tank for storage, meanwhile, the tube bundle vehicle b is used as an auxiliary working vehicle to start hydrogen supply, the hydrogen of the tube bundle vehicle b enters an air-discharging main path through a third channel 202, is pressurized to 45Mpa by the high-pressure compressor and then enters a hydrogenation machine to hydrogenate the vehicles;
2.2 when the pressure of the low-pressure buffer tank reaches 20Mpa, the control unit controls the second pneumatic valve 12 and the fifth pneumatic valve 15 to be opened, the first pneumatic valve 11, the third pneumatic valve 13 and the fourth pneumatic valve 14 to be closed, the tube bundle vehicle b stops supplying hydrogen, the low-pressure buffer tank is switched to be an air source of the high-pressure compressor, and meanwhile, the tube bundle vehicle a is still the air source of the low-pressure compressor;
2.3 when the pressure of the low-pressure buffer tank is less than 7.5Mpa, returning to 2.1 and circulating the processes of 2.1-2.3 until the pressure of the tube bundle vehicle a is reduced to 2Mpa, and entering the step 3.
And 3, step 3: when the pressure of the tube bundle vehicle a is reduced to 2Mpa, the residual air of the tube bundle vehicle a is utilized, the tube bundle vehicle a is switched to a tube bundle vehicle c with full pressure, the tube bundle vehicle b continues to work as a main working vehicle at the moment, and the tube bundle vehicle c does not start to work as an auxiliary working vehicle.
And 4, step 4: when the pressure of the tube bundle vehicle b is reduced to be below 7.5Mpa but higher than 2Mpa, repeating the step 2 in the same way until the residual air of the tube bundle vehicle b is utilized, removing the tube bundle vehicle b, and then not replacing a new tube bundle vehicle, and only leaving the tube bundle vehicle c to work.
And 5, step 5: when the pressure transmitter 4 detects that the pressure of the tube bundle vehicle c is reduced to below 7.5Mpa but higher than 2Mpa, the control unit controls to enter a third air supply mode, and the third air supply mode is divided into the following three steps 5.1-5.3:
5.1, a pressure sensor of the low-pressure buffer tank continuously detects the pressure of the low-pressure buffer tank and transmits a pressure signal to the control unit, when the pressure of the low-pressure buffer tank is less than 20Mpa, the control unit controls the second pneumatic valve 12 to be opened, and the first pneumatic valve, the third pneumatic valve, the fourth pneumatic valve and the fifth pneumatic valve are closed, so that hydrogen in the tube bundle vehicle c enters an air unloading auxiliary path from the second channel 103, and enters the low-pressure buffer tank for storage after being pressurized by the low-pressure compressor;
5.2 when the pressure of the low-pressure buffer tank reaches 20Mpa, the control unit controls the second pneumatic valve 12 and the fifth pneumatic valve 15 to be opened, and the first pneumatic valve, the third pneumatic valve and the fourth pneumatic valve to be closed, so that hydrogen in the low-pressure buffer tank enters the high-pressure compressor, and meanwhile, the tube bundle vehicle c still supplies hydrogen to the low-pressure compressor;
5.3 when the pressure in the low-pressure buffer tank is less than 7.5Mpa, returning to 5.1 and circulating the processes of 5.1-5.3 until the pressure of the tube bundle vehicle c is reduced to 2Mpa, and entering the step 6.
And 6, step 6: when the pressure of the tube bundle vehicle c is reduced to 2Mpa, the utilization of the residual air of the tube bundle vehicle c is finished.
Among the above-mentioned embodiment 1, hydrogen unloads the gas system and includes mutually independent first tube bank car connecting branch and second tube bank car connecting branch, and two tube bank car connecting branch can connect a tube bank car respectively, and the benefit that sets up like this can be according to tube bank car pressure variation automatic switch-over air supply, reduces opening of high pressure compressor and low pressure compressor and stops the number of times, prolongs the life-span of compressor diaphragm. In other embodiments, if the number of times of starting and stopping the compressor is not considered, only how to improve the hydrogen utilization rate of the tube bundle cart is considered, and of course, only one tube bundle cart connecting branch can be arranged. When only one tube bundle vehicle connecting branch is arranged, the first valve can be arranged on the first channel and can also be arranged on the air discharging main path, and similarly, the second valve can be arranged on the second channel and can also be arranged on the air discharging auxiliary path.
In the embodiment 1, the fifth pneumatic valve is arranged at the downstream of the low-pressure buffer tank, so that the low-pressure compressor is not required to be shut down when the low-pressure buffer tank is fully pressurized, the low-pressure buffer tank can be used as an air source of the high-pressure compressor for air supply, the starting and stopping times of the low-pressure compressor are reduced, and the service life of the diaphragm is prolonged. In other embodiments, a pneumatic valve is not arranged at the downstream of the low-pressure buffer tank, and the defects of the low-pressure buffer tank are that the low-pressure compressor needs to be shut down temporarily when the low-pressure buffer tank is fully pressurized, and then the low-pressure compressor is restarted in the subsequent process, so that the service life of the compressor diaphragm is shortened due to frequent starting and stopping.
In the above embodiment 1, the first check valve is provided on the gas-discharge sub-line downstream of the fifth pneumatic valve in order to avoid reverse-crossing of the high-pressure hydrogen gas into the low-pressure buffer tank. In other embodiments, no one-way valve may be provided.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A hydrogen gas discharge system comprising:
the first tube bank vehicle is connected with the branch and the main gas unloading path;
the first tube bundle trolley connecting branch is provided with a first tube bundle trolley connector used for connecting the tube bundle trolley;
a high-pressure compressor is arranged in the gas discharge main path;
it is characterized by also comprising:
the gas discharging auxiliary path is internally provided with a low-pressure compressor, and one end of the gas discharging auxiliary path positioned at the downstream of the low-pressure compressor is connected to the gas inlet of the high-pressure compressor;
the first channel is communicated with the first tube bank vehicle connecting branch and one end, located at the upstream of the high-pressure compressor, of the main gas unloading path;
the second channel is communicated with the first tube bank vehicle connecting branch and one end, located at the upstream of the low-pressure compressor, of the gas unloading auxiliary road;
the first valve is arranged on the gas unloading main path or the first channel and used for communicating or disconnecting the connection between the first tube bundle vehicle connection branch and the gas unloading main path;
the second valve is arranged on the gas unloading auxiliary road or the second channel and is used for communicating or disconnecting the connection of the first tube bank vehicle connection branch and the gas unloading auxiliary road;
the hydrogen gas unloading system also comprises a control unit, wherein the control unit is in control connection with the first valve and the second valve, the hydrogen gas of the connecting branch of the first tube bank vehicle can realize pressurization through two different paths by controlling the opening and closing of the first valve and the second valve, the first path is that the hydrogen gas directly enters a high-pressure compressor in the gas unloading main path from the first channel, and the second path is that the hydrogen gas firstly enters a low-pressure compressor in the gas unloading auxiliary path from the second channel and then enters the high-pressure compressor after pressurization.
2. The hydrogen gas unloading system of claim 1, wherein the hydrogen gas unloading system further comprises a second tube bundle cart connecting branch, a third channel, and a fourth channel; a second pipe bundle vehicle joint for connecting the pipe bundle vehicle is arranged on the second pipe bundle vehicle connecting branch; the third channel is communicated with the second tube bank vehicle connecting branch and one end of the main gas unloading path, which is positioned at the upstream of the high-pressure compressor; the fourth channel is communicated with the second tube bank vehicle connecting branch and one end, located at the upstream of the low-pressure compressor, of the gas unloading auxiliary road; the third channel is provided with a third valve for communicating or disconnecting the connection of the second tube bundle vehicle connection branch and the gas discharge main path; a fourth valve is arranged on the fourth channel and used for connecting or disconnecting the connection between the second tube bundle vehicle connection branch and the gas unloading auxiliary road, and the third valve and the fourth valve are in control connection with the control unit; the first valve is arranged in the first channel, and the second valve is arranged in the second channel.
3. The hydrogen gas unloading system as claimed in claim 2, wherein a low pressure buffer tank is connected in series with the unloading auxiliary circuit at the downstream of the low pressure compressor, and a fifth valve is arranged at the downstream of the low pressure buffer tank and is in control connection with the control unit.
4. A hydrogen gas unloading system as defined in claim 3, wherein a first check valve is further provided in said gas unloading bypass downstream of said fifth valve.
5. A hydrogen gas discharge system according to any one of claims 1 to 4, wherein a second check valve is further provided in the main gas discharge path, the second check valve being located upstream of the connection point between the downstream end of the auxiliary gas discharge path and the main gas discharge path.
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| CN202022257186.2U CN214171944U (en) | 2020-10-12 | 2020-10-12 | Hydrogen gas discharging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022257186.2U CN214171944U (en) | 2020-10-12 | 2020-10-12 | Hydrogen gas discharging system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114526443A (en) * | 2022-04-22 | 2022-05-24 | 浙江浙能航天氢能技术有限公司 | Control system for hydrogen switching |
| CN114542976A (en) * | 2022-04-27 | 2022-05-27 | 浙江浙能航天氢能技术有限公司 | Operation maintenance early warning method and system based on hydrogen filling station |
| CN115875595A (en) * | 2022-12-20 | 2023-03-31 | 厚普清洁能源(集团)股份有限公司 | Comprehensive hydrogen source hydrogen filling station and control method and control system thereof |
| CN116557754A (en) * | 2022-01-28 | 2023-08-08 | 国家能源投资集团有限责任公司 | Air intake system and hydrogen refueling station air intake equipment |
| CN118031106A (en) * | 2024-02-04 | 2024-05-14 | 广钢(上海)气体有限公司 | Zero leakage replacement and drying device of high-efficiency helium tube bundle vehicle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116557754A (en) * | 2022-01-28 | 2023-08-08 | 国家能源投资集团有限责任公司 | Air intake system and hydrogen refueling station air intake equipment |
| CN114526443A (en) * | 2022-04-22 | 2022-05-24 | 浙江浙能航天氢能技术有限公司 | Control system for hydrogen switching |
| CN114542976A (en) * | 2022-04-27 | 2022-05-27 | 浙江浙能航天氢能技术有限公司 | Operation maintenance early warning method and system based on hydrogen filling station |
| CN115875595A (en) * | 2022-12-20 | 2023-03-31 | 厚普清洁能源(集团)股份有限公司 | Comprehensive hydrogen source hydrogen filling station and control method and control system thereof |
| CN118031106A (en) * | 2024-02-04 | 2024-05-14 | 广钢(上海)气体有限公司 | Zero leakage replacement and drying device of high-efficiency helium tube bundle vehicle |
| CN118031106B (en) * | 2024-02-04 | 2024-12-27 | 广钢(上海)气体有限公司 | Zero leakage replacement and drying device of high-efficiency helium tube bundle vehicle |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: No.1, Shibali Heyu Road, Guancheng Hui District, Zhengzhou City, Henan Province Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |