CN221522807U - Hydrogen storage system for producing hydrogen by electrolyzing water - Google Patents
Hydrogen storage system for producing hydrogen by electrolyzing water Download PDFInfo
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- CN221522807U CN221522807U CN202323541321.6U CN202323541321U CN221522807U CN 221522807 U CN221522807 U CN 221522807U CN 202323541321 U CN202323541321 U CN 202323541321U CN 221522807 U CN221522807 U CN 221522807U
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- 238000003860 storage Methods 0.000 title claims abstract description 167
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 239000001257 hydrogen Substances 0.000 title claims abstract description 137
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 137
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 239000007788 liquid Substances 0.000 claims abstract description 185
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 57
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000001301 oxygen Substances 0.000 claims abstract description 38
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 34
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 239000003792 electrolyte Substances 0.000 abstract description 52
- 238000004880 explosion Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model provides a hydrogen production and storage system by water electrolysis. The utility model relates to a hydrogen production and storage system by water electrolysis, which comprises a first liquid storage tank, a second liquid storage tank and an electrolysis device; the first liquid storage tank and the second liquid storage tank are communicated through a communicating pipe, the negative electrode electrolytic chamber is communicated with the second liquid storage tank through a first pipeline, and the positive electrode electrolytic chamber is communicated with the first liquid storage tank through a second pipeline; the hydrogen production and storage system by water electrolysis adopts a simple and safe method to remove air (or oxygen) in the whole system, and can effectively avoid explosion of hydrogen after hydrogen is prepared by electrolysis; meanwhile, the second liquid storage tank not only plays a role in storing electrolyte, but also plays a role in storing hydrogen and sealing liquid seal. Not only improves the utilization rate of the equipment and improves the integrity and the safety of the equipment, so that the equipment is miniaturized.
Description
Technical Field
The utility model relates to the technical field of hydrogen energy, in particular to a hydrogen production and storage system by water electrolysis.
Background
The hydrogen energy can realize the emission of 0 carbon, and is an important renewable clean energy source in the future. The hydrogen production by water electrolysis is a process that voltage is applied to two sides of a positive electrode and a negative electrode immersed in electrolyte, hydrogen is separated from the negative electrode of a current electrode, and oxygen is separated from the positive electrode of the current electrode. After the hydrogen (or oxygen) is produced, it is typically stored in another dedicated hydrogen storage tank (or oxygen storage tank). If the hydrogen gas and the oxygen gas are mixed or the hydrogen gas and the external air are mixed, there is a risk of explosion when the concentration of the hydrogen gas is more than 4%.
How to discharge air (or oxygen) in the whole system in the process of producing hydrogen by electrolyzing water can effectively avoid the explosion of hydrogen, and is a problem to be solved by the person skilled in the art.
Disclosure of utility model
In view of the above, the utility model provides a hydrogen production and storage system by water electrolysis, which solves the technical problems in the prior art.
In a first aspect, the present utility model provides a hydrogen storage system for producing hydrogen by electrolysis of water, comprising:
The first liquid storage tank is provided with a liquid injection pipe;
A second liquid storage tank;
One end of the communicating pipe is communicated with one side of the bottom of the first liquid storage tank, and the other end of the communicating pipe is communicated with one side of the bottom of the second liquid storage tank;
an electrolysis apparatus comprising:
The positive electrode electrolytic chamber is internally provided with a positive electrode, and an oxygen discharge pipe is arranged on the positive electrode electrolytic chamber;
A negative electrode electrolytic chamber in which a negative electrode is provided;
The positive electrode end of the power supply is electrically connected with the positive electrode, and the negative electrode end of the power supply is electrically connected with the negative electrode;
one end of the salt bridge is communicated with the positive electrode electrolytic chamber, and the other end is communicated with the negative electrode electrolytic chamber;
one end of the first pipeline is communicated with the top of the second liquid storage tank, the other end of the first pipeline is communicated with the negative electrode electrolytic chamber, a first water pump is arranged on the first pipeline, a first valve is arranged on the first pipeline, which is close to one end of the negative electrode electrolytic chamber, and a hydrogen exhaust pipe is also arranged on the first pipeline;
And one end of the second pipeline is communicated with the first liquid storage tank, the other end of the second pipeline is communicated with the positive electrode electrolytic chamber, a second water pump is arranged on the second pipeline, and a second valve is arranged on the second pipeline and close to one end of the first liquid storage tank.
Preferably, in the electrolytic water hydrogen production and storage system, a first liquid level sensor is arranged at the upper end in the second liquid storage tank;
And a second liquid level sensor is arranged in the second liquid storage tank, close to the communicating pipe, and above the communicating pipe.
Preferably, in the water electrolysis hydrogen production and storage system, a first pressure sensor is arranged at the top end of the positive electrode electrolysis chamber;
and a second pressure sensor is arranged at the top end of the negative electrode electrolysis chamber.
Preferably, in the hydrogen production and storage system by water electrolysis, the hydrogen exhaust pipe is positioned between the first water pump and the second liquid storage tank, and the hydrogen exhaust pipe is provided with a hydrogen exhaust valve and a hydrogen dryer.
Preferably, in the hydrogen production and storage system by water electrolysis, a third pressure sensor is arranged between the first pipeline and the hydrogen exhaust pipe and the second liquid storage tank.
Preferably, in the electrolytic water hydrogen production and storage system, the liquid injection pipe is provided with a liquid injection valve and a third water pump.
Preferably, in the hydrogen production and storage system by water electrolysis, a fourth pressure sensor is arranged at the top end of the first liquid storage tank.
Preferably, in the hydrogen production and storage system by water electrolysis, a liquid discharge pipe is arranged on one side of the second pipeline, which is close to the positive electrode electrolytic chamber, and a liquid discharge valve is arranged on the liquid discharge pipe.
Preferably, in the hydrogen production and storage system by water electrolysis, a third valve is arranged between the liquid discharge pipe and the positive electrode electrolysis chamber on the second pipeline.
Preferably, in the electrolytic water hydrogen production and storage system, an oxygen discharge valve is arranged on the oxygen discharge pipe;
a third liquid level sensor is arranged on the side wall of the positive electrode electrolytic chamber close to the bottom;
A fourth valve is arranged on the first pipeline and positioned between the third pressure sensor and the second liquid storage tank;
And a fifth valve is arranged between the hydrogen exhaust pipe and the first water pump on the first pipeline.
Compared with the prior art, the hydrogen production and storage system by electrolysis of water has the following beneficial effects:
The utility model relates to a hydrogen production and storage system by water electrolysis, which comprises a first liquid storage tank, a second liquid storage tank and an electrolysis device; the first liquid storage tank and the second liquid storage tank are communicated through a communicating pipe, the negative electrode electrolytic chamber is communicated with the second liquid storage tank through a first pipeline, and the positive electrode electrolytic chamber is communicated with the first liquid storage tank through a second pipeline; the hydrogen production and storage system by water electrolysis adopts a simple and safe method to remove air (or oxygen) in the whole system, and can effectively avoid explosion of hydrogen after hydrogen is prepared by electrolysis; meanwhile, the second liquid storage tank not only plays a role in storing electrolyte, but also plays a role in storing hydrogen and sealing liquid seal. Not only improves the utilization rate of the equipment and the integrity and the safety of the equipment, so that the equipment is miniaturized; the utility model relates to a hydrogen production and storage system by water electrolysis, which is characterized in that the structure of a water storage tank is modified, a communicating vessel principle is adopted, a liquid storage tank is divided into two parts, a first liquid storage tank and a second liquid storage tank, the lower ends of the first liquid storage tank and the second liquid storage tank are communicated through a communicating pipe, wherein the first liquid storage tank with higher position provides electrolyte for hydrogen production by water electrolysis, the upper end of the second liquid storage tank with lower position (the electrolyte is fully filled in the second liquid storage tank before the system starts to operate) is provided with a second valve (when the internal hydrogen pressure reaches a set value), and excessive hydrogen is discharged out of the system.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a hydrogen storage system for producing hydrogen by water electrolysis according to the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be understood that, for the convenience of description and simplification of the description, it is not necessary to indicate or imply that the apparatus or elements referred to have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model, it is that the relation of orientation or position indicated as "upper" is based on the orientation or position relation shown in the drawings, or the orientation or position relation that is conventionally put when the inventive product is used, or the orientation or position relation that is conventionally understood by those skilled in the art.
The following description of the embodiments of the present utility model will be made in detail and with reference to the embodiments of the present utility model, but it should be apparent that the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
The embodiment of the utility model provides a hydrogen production and storage system by water electrolysis, which is shown in figure 1 and comprises:
A first liquid storage tank 1 is provided with a liquid injection pipe 102;
a second liquid storage tank 2;
One end of the communicating pipe 4 is communicated with one side of the bottom of the first liquid storage tank 1, and the other end of the communicating pipe is communicated with one side of the bottom of the second liquid storage tank 2;
an electrolysis apparatus comprising:
A positive electrode electrolytic chamber 301, in which a positive electrode 304 is provided, and an oxygen discharge pipe 302 is provided on the positive electrode electrolytic chamber 301;
a negative electrode electrolytic chamber 306 in which a negative electrode 307 is provided;
A power supply 3, the positive terminal of which is electrically connected to the positive electrode 304, and the negative terminal of which is electrically connected to the negative electrode 307;
a salt bridge 305, one end of which is communicated with the positive electrode electrolytic chamber 301, and the other end of which is communicated with the negative electrode electrolytic chamber 306;
One end of the first pipeline 401 is communicated with the top of the second liquid storage tank 2, the other end of the first pipeline 401 is communicated with the negative electrode electrolysis chamber 306, a first water pump 208 is arranged on the first pipeline 401, a first valve 312 is arranged at one end, close to the negative electrode electrolysis chamber 306, of the first pipeline 401, and a hydrogen exhaust pipe 204 is also arranged on the first pipeline 401;
And one end of the second pipeline 402 is communicated with the first liquid storage tank 1, the other end of the second pipeline 402 is communicated with the positive electrode electrolytic chamber 301, the second pipeline 402 is provided with the second water pump 105, and one end, close to the first liquid storage tank 1, of the second pipeline 402 is provided with the second valve 103.
The utility model relates to a hydrogen production and storage system by water electrolysis, which comprises a first liquid storage tank 1, a second liquid storage tank 2 and an electrolysis device; the top end of the first liquid storage tank 1 is provided with a liquid injection pipe 102, and electrolyte can be injected into the first liquid storage tank 1 through the liquid injection pipe 102; the bottoms of the first liquid storage tank 1 and the second liquid storage tank 2 are communicated through a communicating pipe 4, specifically, the bottoms of the first liquid storage tank 1 and the second liquid storage tank 2 are approximately on the same horizontal line, and the top of the first liquid storage tank 1 is higher than the top of the second liquid storage tank 2; the electrolysis apparatus includes: a positive electrode electrolytic chamber 301, a negative electrode electrolytic chamber 306, a power supply 3 and a salt bridge 305; the positive electrode end of the power supply 3 is electrically connected with the positive electrode 304 in the positive electrode electrolytic chamber 301 through a wire, and the negative electrode end of the power supply 3 is electrically connected with the negative electrode 307 in the negative electrode electrolytic chamber 306 through a wire; an oxygen discharge pipe 302 is arranged at the upper end of the positive electrode electrolytic chamber 301; the positive electrode electrolytic chamber 301 and the negative electrode electrolytic chamber 306 are communicated through a salt bridge 305, and specifically, the salt bridge 305 comprises a pipeline and agar-saturated KCl positioned in the pipeline; one end of the first pipeline 401 is communicated with the top of the second liquid storage tank 2, and the other end is communicated with the top of the negative electrode electrolysis chamber 306; the first pipeline 401 is provided with a first water pump 208, one end of the first pipeline 401, which is close to the cathode electrolysis chamber 306, is provided with a first valve 312, and the first pipeline 401 is also provided with a hydrogen exhaust pipe 204; one end of a second pipeline 402 is communicated with the lower end of the first liquid storage tank 1, the other end of the second pipeline 402 is communicated with the positive electrode electrolytic chamber 301, a second water pump 105 is arranged on the second pipeline 402, and a second valve 103 is arranged on one end, close to the first liquid storage tank 1, of the second pipeline 402.
When in use, electrolyte (such as potassium hydroxide solution) is injected into the first liquid storage tank 1 through the liquid injection pipe 102, the electrolyte enters the second liquid storage tank 2 through the communicating pipe 4, flows into the negative electrode electrolytic chamber 306 through the first pipeline 401, then enters the positive electrode electrolytic chamber 301 through the salt bridge 305, after the second liquid storage tank 2, the negative electrode electrolytic chamber 306 and the positive electrode electrolytic chamber 301 are filled with electrolyte, the air in the whole system can be discharged, the air (or oxygen) in the whole system is discharged by adopting a simple and safe method, and the explosion of hydrogen can be effectively avoided after hydrogen is prepared by electrolysis; after filling the electrolyte, stopping the injection of the electrolyte through the electrolyte injection pipe 102, closing the first valve 312, closing the oxygen discharge pipe 302, switching on the power supply 3, generating oxygen at the positive electrode 304 and hydrogen at the negative electrode 307 by the reaction of the electrolyzed water; at this time, the generated oxygen gas will be partially collected on the positive electrode electrolytic chamber 301, the generated hydrogen gas will be partially collected on the negative electrode electrolytic chamber 306, when the pressure in the negative electrode electrolytic chamber 306 reaches a certain value, for example, when the hydrogen gas pressure in the negative electrode electrolytic chamber 306 is greater than the hydraulic pressure of the electrolyte in the first pipeline 401, at this time, the first valve 312 is opened, along with the continuous generation of the hydrogen gas, the electrolyte in the first pipeline 401 can be completely injected back into the second liquid storage tank 2 with the aid of the first water pump 208, and then the first water pump 208 is closed; opening the second valve 103, injecting electrolyte into the second pipeline 402 from the first liquid storage tank 1, opening the second water pump 105, adjusting and controlling the flow rate of the electrolyte injected into the positive electrode electrolytic chamber 301 from the first liquid storage tank 1, opening the oxygen discharge pipe 302, then continuously discharging oxygen from the oxygen discharge pipe 302 by generating oxygen through the positive electrode 304, continuously injecting hydrogen generated by the negative electrode 307 into the second liquid storage tank 2 through the first pipeline 401, and continuously pressing the liquid level in the second liquid storage tank 2; when the liquid level of the second liquid storage tank 2 reaches a preset limit, (if the liquid level is too low due to further reaction, hydrogen enters the first liquid storage tank 1 from the second liquid storage tank 2 through the communicating pipe 4, hydrogen leakage is caused, and the hydrogen leakage is not allowed), the power supply 3 is closed, the first valve 312, the second valve 103 and the second water pump 105 are closed, and at the moment, the hydrogen is stored at a position above the preset liquid level of the second liquid storage tank 2; the hydrogen gas exhaust pipe 204 is opened, and hydrogen gas is discharged out of the system through the hydrogen gas exhaust pipe 204 due to the hydraulic pressure caused by the liquid level difference in the first liquid storage tank 1.
The hydrogen production and storage system by water electrolysis adopts a simple and safe method to remove air (or oxygen) in the whole system, and can effectively avoid explosion of hydrogen after hydrogen is prepared by electrolysis; meanwhile, the second liquid storage tank not only plays a role in storing electrolyte, but also plays a role in storing hydrogen and sealing liquid seal. Not only improves the utilization rate of the equipment and the integrity and the safety of the equipment, so that the equipment is miniaturized; the utility model relates to a hydrogen production and storage system by water electrolysis, which is characterized in that the structure of a water storage tank is modified, a communicating vessel principle is adopted, a liquid storage tank is divided into two parts, a first liquid storage tank and a second liquid storage tank, the lower ends of the first liquid storage tank and the second liquid storage tank are communicated through a communicating pipe, wherein the first liquid storage tank with higher position provides electrolyte for hydrogen production by water electrolysis, and the upper end of the second liquid storage tank with lower position (the electrolyte is fully filled in the second liquid storage tank before the system starts to operate) is provided with a second valve 103 (when the internal hydrogen pressure reaches a set value (such as 4 MPa), and excessive hydrogen is discharged out of the system).
In some embodiments, a first level sensor 210 is disposed at the upper end of the second liquid storage tank 2, and the first level sensor 210 is configured to monitor the level of the electrolyte in the second liquid storage tank 2.
In some embodiments, a second liquid level sensor 206 is disposed within the second liquid storage tank 2 proximate to the communication tube and above the communication tube 4. The second liquid level sensor 206 is located below the first liquid level sensor 210, and when the liquid level of the second liquid storage tank 2 reaches a predetermined limit, the second liquid level sensor 206 prompts that the liquid level has reached a set value, the power supply is turned off to stop the electrolytic reaction, and if the further reaction results in too low liquid level, hydrogen gas enters the first liquid storage tank 1 from the second liquid storage tank 2 through the communicating pipe 4, so that hydrogen gas leaks. In some embodiments, a first pressure sensor 309 is provided at the top end of the positive electrode electrolyte chamber 301, the first pressure sensor 309 being used to monitor the pressure within the positive electrode electrolyte chamber 301.
In some embodiments, a second pressure sensor 308 is provided at the top of the negative electrode electrolysis chamber 306, the second pressure sensor 308 being configured to monitor the pressure within the negative electrode electrolysis chamber 306.
In some embodiments, the hydrogen exhaust pipe 204 is located between the first water pump 208 and the second liquid storage tank 2, and the hydrogen exhaust valve 203 and the hydrogen dryer 205 are disposed on the hydrogen exhaust pipe 204.
After the hydrogen exhaust valve 203 is opened, hydrogen is exhausted through the hydrogen exhaust pipe 204, and water vapor in the hydrogen is removed through the hydrogen dryer 205, so that the purity of the hydrogen is improved, and the hydrogen exhaust pipe 204 can be communicated with an external hydrogen using scene, including a fuel cell, a hydrogen bottle and the like.
In some embodiments, a third pressure sensor 207 is provided in the first conduit 401 between the hydrogen stack 204 and the second reservoir 2. The third pressure sensor 207 is used to monitor the pressure within the first conduit 401.
In some embodiments, the priming tube 102 is provided with a priming valve 101 and a third water pump 106. After the liquid injection valve 101 is opened, the third water pump 106 is started, and the electrolyte can be injected into the first liquid storage tank 1.
In some embodiments, a fourth pressure sensor 107 is provided at the top end of the first fluid reservoir 1, the fourth pressure sensor 107 being configured to monitor the pressure within the first fluid reservoir 1.
In some embodiments, the second pipe 2 is provided with a drain pipe 314 near the side of the positive electrode electrolytic chamber 301, and the drain pipe 314 is provided with a drain valve 313. When the drain valve 313 is opened, the electrolyte in the second pipe 2 can flow out of the drain pipe 314, indicating that the electrolyte in the second pipe 2 is completely filled.
In some embodiments, a third valve 311 is provided on the second conduit 2 between the drain 314 and the positive electrode electrolyte chamber 301. Opening the third valve 311, the electrolyte in the second pipeline 2 can flow into the positive electrode electrolytic chamber 301
In some embodiments, an oxygen discharge valve 303 is provided on the oxygen discharge pipe 302, the oxygen discharge valve 303 is opened, and oxygen in the positive electrode electrolytic chamber 301 is discharged through the oxygen discharge pipe 302.
In some embodiments, a third level sensor 310 is disposed near the bottom of the sidewall of the positive electrode electrolyte chamber 301, and the third level sensor 310 is configured to monitor the electrolyte level in the positive electrode electrolyte chamber 301.
In some embodiments, a fourth valve 201 is disposed on the first conduit 401 between the third pressure sensor 207 and the second fluid reservoir 2.
In some embodiments, a fifth valve 209 is disposed on the first conduit 401 between the hydrogen vent line 204 and the first water pump 208.
The working principle of the hydrogen production and storage system by water electrolysis of the utility model is further described below:
first, completely injecting electrolyte:
Electrolyte (such as potassium hydroxide solution) is injected into the first liquid storage tank 1 through the liquid injection pipe 102 under the action of the third water pump 106; the current pipeline switch conditions are as follows: the liquid injection valve 101 is opened, the second valve 103 is closed, the fourth valve 201 is opened, the hydrogen gas exhaust valve 203 is closed, the fifth valve 209 is opened, the first valve 312 is opened, the oxygen gas exhaust valve 303 is opened, the third valve 311 is closed, and the liquid discharge valve 313 is closed; at this time, the liquid filling pipe 102 at the higher position can completely fill the parts of the first liquid storage tank 1, the communicating pipe 4, the second liquid storage tank 2, the first pipeline 401, the negative electrode electrolytic chamber 306, the salt bridge 305 and the positive electrode electrolytic chamber 301 with electrolyte, and air is discharged; when the oxygen discharge pipe 302 discharges the electrolyte, it is again confirmed whether the electrolyte is completely filled in the system by reading the pressure values read by the fourth pressure sensor 107 at the top end of the first liquid storage tank 1, the third pressure sensor 207 on the first pipe 401, the second pressure sensor 308 at the top end of the negative electrode electrolyte chamber 306, and the first pressure sensor 309 at the top end of the positive electrode electrolyte chamber 301.
Secondly, hydrogen production by water electrolysis:
After filling up the electrolyte, stopping the injection of the electrolyte through the injection pipe 102, and closing the first valve 312 and the oxygen discharge valve 303; the power supply 3 is turned on, oxygen is generated at the positive electrode 304 and hydrogen is generated at the negative electrode 307 by the reaction of electrolyzed water; the oxygen generated at this time is partially collected in the positive electrode electrolytic chamber 301, and the hydrogen generated is partially collected in the negative electrode electrolytic chamber 306; continuously monitoring the pressure in the negative electrode electrolytic chamber 306 and the positive electrode electrolytic chamber 301 by the second pressure sensor 308 and the first pressure sensor 309; when the pressure in the negative electrode electrolysis chamber 306 reaches a certain value, for example, when the hydrogen pressure in the negative electrode electrolysis chamber 306 is greater than the hydraulic pressure of the electrolyte in the first pipeline 401, the first valve 312 is opened, and with the continuous generation of hydrogen, the electrolyte in the first pipeline 401 can be completely injected back into the second liquid storage tank 2 with the aid of the first water pump 208, and then the first water pump 208 is closed; opening the second valve 103 and the drain valve 313, injecting electrolyte into the second pipeline 402 from the first liquid storage tank 1, and when the electrolyte flows out from the drain pipe 314, indicating that the second pipeline 402 is completely filled with the electrolyte; then the liquid discharge valve 313 is closed, the oxygen discharge valve 303 and the third valve 311 are opened, the second water pump 105 is opened, the flow rate of the electrolyte injected into the positive electrode electrolytic chamber 301 from the first liquid storage tank 1 is regulated and controlled, the oxygen discharge pipe 302 is opened, then oxygen is continuously discharged from the oxygen discharge pipe 302 by generating oxygen through the positive electrode 304, and hydrogen generated by the negative electrode 307 is continuously injected into the second liquid storage tank 2 through the first pipeline 401 and continuously presses down the liquid level in the second liquid storage tank 2.
Thirdly, stopping hydrogen production by water electrolysis:
When the liquid level of the second liquid storage tank 2 reaches the preset limit, the second liquid level sensor 206 prompts that the liquid level has reached the set value (if the liquid level is too low due to further reaction, hydrogen gas enters the first liquid storage tank 1 from the second liquid storage tank 2 through the communicating pipe 4, so that hydrogen gas leaks), the power supply 3 is turned off, the first valve 312, the third valve 311, the second water pump 105, the second valve 103 and the fifth valve 209 are turned off, and at this time, the hydrogen gas is stored at a position above the preset liquid level of the second liquid storage tank 2.
Fourth, discharging hydrogen:
At this time, the hydrogen gas exhaust valve 203 is opened, hydrogen gas is discharged out of the system through the hydrogen gas exhaust pipe 204 due to the hydraulic pressure caused by the liquid level difference in the first liquid storage tank 1, and water vapor in the hydrogen gas is removed through the hydrogen gas dryer 205, so that the purity of the hydrogen gas is improved. When the liquid levels of the first liquid storage tank 1 and the second liquid storage tank 2 are the same, the liquid level difference is not generated, the residual hydrogen in the second liquid storage tank 2 cannot be continuously discharged, at the moment, the third water pump 106 is turned on, the electrolyte is continuously injected into the first liquid storage tank 1 through the liquid injection pipe 102, and the residual hydrogen in the second liquid storage tank 2 is continuously discharged through the external pressure; when the liquid level in the second liquid storage tank 2 reaches the set position, the first liquid level sensor 210 indicates that the liquid level has been reached (the electrolyte is continuously injected again, so that the hydrogen gas exhaust pipe is fed in), and at the moment, the electrolyte is stopped being continuously injected into the first liquid storage tank 1 through the liquid injection pipe 102, and the third water pump 106 is turned off.
Fifthly, continuously electrolyzing water to prepare hydrogen:
closing the hydrogen off-gas valve 203; the power supply 3 is turned on, oxygen is generated at the positive electrode 304 and hydrogen is generated at the negative electrode 307 by the reaction of electrolyzed water; at this time, the generated oxygen gas is partially collected in the positive electrode electrolytic chamber 301, the generated hydrogen gas is partially collected in the negative electrode electrolytic chamber 306, and the pressures in the negative electrode electrolytic chamber 306 and the positive electrode electrolytic chamber 301 are continuously monitored by the second pressure sensor 308 and the first pressure sensor 309; when the pressure in the negative electrode electrolyte chamber 306 reaches a certain value, for example, when the hydrogen pressure in the negative electrode electrolyte chamber 306 is greater than the hydraulic pressure of the electrolyte in the first pipeline 401, the first valve 312 is opened, and the remaining steps of the second step are repeated.
The hydrogen production and storage system for the electrolyzed water provided by the application is characterized in that hydrogen is produced by the electrolyzed water, and the chemical equation is as follows:
2H2O→2H2↑+O2↑；
1mol of water was consumed to produce 1mol of hydrogen and 0.5mol of oxygen, and the volume of 1mol of water was 18mL (25 ℃ C.), the volume of 1mol of hydrogen was 22.4L (1 atm, 25 ℃ C.), and the volume of produced hydrogen was about 1244 times the volume of consumed water. Therefore, the volume relation between the consumption of water and hydrogen is considered when designing the liquid storage tank. Specifically, the volume of the second liquid storage tank 2 is 2.3 cubic meters (2300L), the maximum design hydrogen storage capacity is 2240L of an arc body (the upper end of the second liquid storage tank 2 is hemispherical, the lower end of the second liquid storage tank is cylindrical, the radius is 65cm, the height is 130 cm), the volume is equivalent to 100mol of hydrogen storage capacity, and the consumed water volume is about 1.8L. The water level below the second level sensor 206 is 60L, ensuring that a liquid seal is formed. The volume of the first liquid storage tank 1 designed by the application is 2700L cylinder (radius is 75cm, height is 153 cm), the first liquid storage tank 1 has 400L capacity more than the second liquid storage tank 2, and the hydrogen production and hydrogen discharge cycle can be completed by adding one electrolyte for about 180-200 times, so that 400-450 standard cubic meters of hydrogen is produced altogether. The power consumption of the water electrolysis hydrogen production system is 3.8-4.2 ℃ and 1 standard cubic meter of hydrogen is produced electrically.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A hydrogen storage system for producing hydrogen by electrolysis of water, comprising:
The first liquid storage tank is provided with a liquid injection pipe;
A second liquid storage tank;
One end of the communicating pipe is communicated with one side of the bottom of the first liquid storage tank, and the other end of the communicating pipe is communicated with one side of the bottom of the second liquid storage tank;
an electrolysis apparatus comprising:
The positive electrode electrolytic chamber is internally provided with a positive electrode, and an oxygen discharge pipe is arranged on the positive electrode electrolytic chamber;
A negative electrode electrolytic chamber in which a negative electrode is provided;
The positive electrode end of the power supply is electrically connected with the positive electrode, and the negative electrode end of the power supply is electrically connected with the negative electrode;
one end of the salt bridge is communicated with the positive electrode electrolytic chamber, and the other end is communicated with the negative electrode electrolytic chamber;
one end of the first pipeline is communicated with the top of the second liquid storage tank, the other end of the first pipeline is communicated with the negative electrode electrolytic chamber, a first water pump is arranged on the first pipeline, a first valve is arranged on the first pipeline, which is close to one end of the negative electrode electrolytic chamber, and a hydrogen exhaust pipe is also arranged on the first pipeline;
And one end of the second pipeline is communicated with the first liquid storage tank, the other end of the second pipeline is communicated with the positive electrode electrolytic chamber, a second water pump is arranged on the second pipeline, and a second valve is arranged on the second pipeline and close to one end of the first liquid storage tank.
2. The hydrogen production and storage system by water electrolysis according to claim 1, wherein a first liquid level sensor is arranged at the upper end in the second liquid storage tank;
And a second liquid level sensor is arranged in the second liquid storage tank, close to the communicating pipe, and above the communicating pipe.
3. The system for producing hydrogen and storing hydrogen by electrolyzing water as claimed in claim 1, wherein a first pressure sensor is arranged at the top end of the positive electrode electrolytic chamber;
and a second pressure sensor is arranged at the top end of the negative electrode electrolysis chamber.
4. The system for producing hydrogen and storing hydrogen by electrolyzing water as claimed in claim 1, wherein the hydrogen exhaust pipe is located between the first water pump and the second liquid storage tank, and a hydrogen exhaust valve and a hydrogen dryer are arranged on the hydrogen exhaust pipe.
5. The hydrogen storage system for producing hydrogen by electrolyzing water as claimed in claim 4 wherein a third pressure sensor is provided between said first conduit and said hydrogen exhaust pipe and said second reservoir.
6. The hydrogen storage system for producing hydrogen by electrolyzing water as claimed in claim 1, wherein the liquid injection pipe is provided with a liquid injection valve and a third water pump.
7. The hydrogen storage system for producing hydrogen by electrolyzing water as claimed in claim 1 wherein a fourth pressure sensor is provided at the top end of said first liquid storage tank.
8. The hydrogen production and storage system by water electrolysis according to claim 1, wherein a liquid discharge pipe is arranged on one side of the second pipeline close to the positive electrode electrolysis chamber, and a liquid discharge valve is arranged on the liquid discharge pipe.
9. The hydrogen production and storage system by water electrolysis according to claim 8, wherein a third valve is arranged on the second pipeline between the liquid discharge pipe and the positive electrode electrolysis chamber.
10. The hydrogen storage system for producing hydrogen by electrolyzing water as claimed in claim 5, wherein an oxygen discharge valve is provided on the oxygen discharge pipe;
a third liquid level sensor is arranged on the side wall of the positive electrode electrolytic chamber close to the bottom;
A fourth valve is arranged on the first pipeline and positioned between the third pressure sensor and the second liquid storage tank;
And a fifth valve is arranged between the hydrogen exhaust pipe and the first water pump on the first pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323541321.6U CN221522807U (en) | 2023-12-25 | 2023-12-25 | Hydrogen storage system for producing hydrogen by electrolyzing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323541321.6U CN221522807U (en) | 2023-12-25 | 2023-12-25 | Hydrogen storage system for producing hydrogen by electrolyzing water |
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| CN221522807U true CN221522807U (en) | 2024-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323541321.6U Active CN221522807U (en) | 2023-12-25 | 2023-12-25 | Hydrogen storage system for producing hydrogen by electrolyzing water |
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| Country | Link |
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| CN (1) | CN221522807U (en) |
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2023
- 2023-12-25 CN CN202323541321.6U patent/CN221522807U/en active Active
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