CN220685266U - Water electrolysis hydrogen production system - Google Patents
Water electrolysis hydrogen production system Download PDFInfo
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- CN220685266U CN220685266U CN202320155051.6U CN202320155051U CN220685266U CN 220685266 U CN220685266 U CN 220685266U CN 202320155051 U CN202320155051 U CN 202320155051U CN 220685266 U CN220685266 U CN 220685266U
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- cooling
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 239000001257 hydrogen Substances 0.000 title claims abstract description 54
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 54
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 39
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 117
- 238000000926 separation method Methods 0.000 claims abstract description 89
- 238000001816 cooling Methods 0.000 claims abstract description 84
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001301 oxygen Substances 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 26
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 239000008236 heating water Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 2
- 239000000498 cooling water Substances 0.000 description 10
- 238000000889 atomisation Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a water electrolysis hydrogen production system. The water electrolysis hydrogen production system comprises: the electrolysis cell is provided with a first outlet and a second outlet, one of the first outlet and the second outlet is an oxygen outlet, and the other is a hydrogen outlet; the gas-liquid separation device is provided with a separation device inlet, a gas separation outlet and a water separation outlet, and the separation device inlet is communicated with the first outlet; the circulating pipeline is connected between the water separation outlet and the inlet of the electrolytic tank, and a cooling device is arranged in the circulating pipeline; the pressure stabilizing device is internally provided with a pressure stabilizing cavity, the pressure stabilizing cavity is provided with a pressure stabilizing first interface, the pressure stabilizing first interface is communicated with the circulating pipeline, and the pressure stabilizing cavity is internally suitable for generating water vapor. According to the water electrolysis hydrogen production system, the system pressure source is water vapor, so that the problem of insufficient system pressure before oxygen is generated is solved.
Description
Technical Field
The utility model relates to the technical field of water electrolysis hydrogen production, in particular to a water electrolysis hydrogen production system.
Background
In a PEM (proton exchange membrane ) pure water electrolytic hydrogen production system, a mixture of oxygen and pure water produced by electrolysis exits from a PEM electrolyzer, enters an oxygen separator for gas-liquid separation, and then pure water returns to the electrolyzer through a circulation pump and a cooling device in sequence. In the related art, the pressure source of the whole system is oxygen, and the pressure control is realized through a regulating valve of an oxygen discharge pipeline. The pressure in the system is insufficient before no oxygen is produced.
Disclosure of Invention
The present utility model aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the utility model provides a water electrolysis hydrogen production system, and the pressure source of the system is steam of water.
The water electrolysis hydrogen production system according to the embodiment of the utility model comprises: the electrolytic tank is provided with a first outlet and a second outlet, one of the first outlet and the second outlet is an oxygen outlet, and the other is a hydrogen outlet; a gas-liquid separation device having a separation device inlet, a gas separation outlet, and a water separation outlet, the separation device inlet being in communication with the first outlet, the gas-liquid separation device being for separating a gas-liquid mixture injected into the gas-liquid separation device from the first outlet into a gas discharged through the gas separation outlet and water discharged through the water separation outlet; the circulating pipeline is connected between the water separation outlet and the inlet of the electrolytic tank, and a cooling device is arranged in the circulating pipeline; the pressure stabilizing device is internally provided with a pressure stabilizing chamber, the pressure stabilizing chamber is provided with a pressure stabilizing first interface, the pressure stabilizing first interface is communicated with the circulating pipeline, and the pressure stabilizing chamber is internally suitable for generating water vapor.
According to the water electrolysis hydrogen production system provided by the embodiment of the utility model, the pressure stabilizing device is arranged, the system pressure source is water vapor, and the problem of insufficient system pressure before oxygen is not generated is solved.
According to some embodiments of the utility model, the water electrolysis hydrogen production system further comprises a surge tube connecting the pressure stabilizing first interface to the circulation line, the junction of the surge tube and the circulation line being located between the water separation outlet and the cooling device.
According to some embodiments of the utility model, the pressure stabilizing chamber further has a pressure stabilizing second interface connected to the circulation line via a cooling line, the connection of the cooling line to the circulation line being located between the cooling device and the inlet of the electrolyzer.
According to some embodiments of the utility model, the cooling pipe is provided with a cooling regulating valve for opening the cooling pipe, closing the cooling pipe or regulating the flow rate of the cooling pipe.
According to some embodiments of the present utility model, the water electrolysis hydrogen production system further includes a pressure detection element for detecting a pressure of the pressure stabilizing chamber, and the cooling regulating valve opens the cooling pipeline when a pressure value detected by the pressure detection element is not lower than a preset pressure threshold value; and when the pressure in the pressure stabilizing cavity is lower than the preset pressure threshold value, the cooling regulating valve closes the cooling pipeline.
According to some embodiments of the utility model, an atomization spray header is arranged at one end of the cooling pipeline extending into the pressure stabilizing device.
According to some embodiments of the utility model, a pressure relief exhaust structure is arranged on the cavity wall of the pressure stabilizing cavity, and the pressure relief exhaust structure is opened intermittently.
According to some embodiments of the utility model, the water electrolysis hydrogen production system further comprises a circulation pump disposed in the circulation line and configured to provide motive force for water flow in the circulation line.
According to some embodiments of the utility model, the circulation pump is located between the water separation outlet and the cooling device, and the connection point of the surge pipe and the circulation line is located between the water separation outlet and the circulation pump.
According to some embodiments of the utility model, the fluctuation pipe is provided with a temperature detection element, and the temperature detection element is used for detecting the pipeline temperature of the fluctuation pipe.
According to some embodiments of the utility model, the pressure stabilizing device comprises a heating element for heating water in the pressure stabilizing chamber at least partially into water vapor, and the water electrolysis hydrogen production system further comprises a control device, wherein the temperature detecting element and the heating element are both connected with the control device, and the control device is used for controlling the heating element to stop working when the temperature detected by the temperature detecting element exceeds a preset temperature threshold value.
Additional aspects and advantages of the utility model 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 utility model.
Drawings
FIG. 1 is a schematic diagram of a hydro-electrolytic hydrogen production system according to an embodiment of the utility model.
Reference numerals:
the water electrolysis hydrogen production system 10, the electrolytic bath 1, the first outlet 11, the second outlet 12, the inlet 13 of the electrolytic bath, the gas-liquid separation device 2, the separation device inlet 21, the gas separation outlet 22, the water separation outlet 23, the first air outlet pipeline 24, the first air valve 25, the circulation pipeline 3, the pressure stabilizing device 4, the pressure stabilizing chamber 41, the pressure stabilizing first interface 42, the pressure stabilizing second interface 43, the heating element 44, the pressure detecting element 45, the pressure relief exhaust structure 46, the cooling device 5, the fluctuation pipe 6, the temperature detecting element 61, the shut-off valve 62, the cooling pipeline 7, the cooling regulating valve 71, the atomizing spray header 72, the circulation pump 8, the second separation device 9, the second air outlet pipeline 91 and the second air valve 92.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
A water electrolysis hydrogen production system 10 in accordance with an embodiment of the present utility model is described in detail below in conjunction with fig. 1.
Referring to fig. 1, a water electrolysis hydrogen production system 10 according to an embodiment of the present utility model may include an electrolytic tank 1, a gas-liquid separation device 2, a circulation line 3, and a pressure stabilizing device 4.
Wherein the cell 1 may be a PEM cell, the cell 1 having a first outlet 11 and a second outlet 12, one of the first outlet 11 and the second outlet 12 being an oxygen outlet and the other being a hydrogen outlet. In some embodiments, the first outlet 11 is a hydrogen outlet and the second outlet 12 is an oxygen outlet. In the example shown in fig. 1, the first outlet 11 is an oxygen outlet, the second outlet 12 is a hydrogen outlet, and the first outlet 11 is a mixture of oxygen and water, and for convenience of description, the first outlet 11 is an oxygen outlet, and the second outlet 12 is a hydrogen outlet.
The gas-liquid separation device 2 has a separation device inlet 21, a gas separation outlet 22, and a water separation outlet 23, the separation device inlet 21 being in communication with the first outlet 11, the gas-liquid separation device 2 being for separating a gas-liquid mixture injected into the gas-liquid separation device 2 from the first outlet 11 into a gas discharged through the gas separation outlet 22 and water discharged through the water separation outlet 23. Optionally, the gas separation outlet 22 is located above the water separation outlet 23, for example, the gas-liquid separation device 2 has a gas-liquid separation cavity, the gas separation outlet 22 is located at the top of the gas-liquid separation cavity, the water separation outlet 23 is located at the bottom of the gas-liquid separation cavity, the first outlet 11 is an oxygen outlet, when the second outlet 12 is a hydrogen outlet, the gas-liquid mixture injected into the gas-liquid separation device 2 from the first outlet 11 is a mixture of oxygen and water, after the gas-liquid mixture enters the gas-liquid separation cavity, the density of water is greater than that of oxygen, the water reaches the bottom of the gas-liquid separation cavity and can be discharged through the water separation outlet 23 at the bottom of the gas-liquid separation cavity, the oxygen reaches the top of the gas-liquid separation cavity and can be discharged through the gas separation outlet 22 at the top of the gas-liquid separation cavity, the gas separation outlet 22 can be connected to the first gas outlet pipe 24, and the first gas outlet pipe 24 can be further connected to the first gas storage tank to store the first gas. A first gas valve 25 may be provided on the first gas outlet pipe 24, and the first gas valve 25 is used to adjust the opening, closing, etc. of the first gas outlet pipe 24.
The second outlet 12 may be connected to the second separation device 9, the second separation device 9 may be connected to the second air outlet pipe 91, and the second air outlet pipe 91 may be further connected to the second air tank, so as to store the second air. A second gas valve 92 may be provided on the second gas outlet pipe 91, and the second gas valve 92 is used to adjust the opening, closing, etc. of the second gas outlet pipe 91.
The circulation pipeline 3 is connected between the water separation outlet 23 and the inlet 13 of the electrolytic tank 1, and the water discharged from the first outlet 11 can be recycled by arranging the circulation pipeline 3, so that waste is avoided. The circulating pipeline 3 is provided with a cooling device 5, and the cooling device 5 is used for cooling water in the circulating pipeline 3 when in operation, so that the water in the circulating pipeline 3 enters the electrolytic tank 1 again to continue to participate in the electrolytic process after being cooled.
The pressure stabilizing device 4 is internally provided with a pressure stabilizing chamber 41, the pressure stabilizing chamber 41 is provided with a pressure stabilizing first interface 42, and the pressure stabilizing first interface 42 is communicated with the circulating pipeline 3, so that water in the circulating pipeline 3 can enter the pressure stabilizing chamber 41 through the pressure stabilizing first interface 42. The pressure stabilizing device 4 comprises a heating element 44, the heating element 44 being arranged to heat the water in the pressure stabilizing chamber 41 at least partly to water vapour. In other words, the pressure stabilizing device 4 includes a pressure stabilizing device housing and a heating element 44, a pressure stabilizing chamber 41 is formed in the pressure stabilizing device housing, a pressure stabilizing first interface 42 is provided on the pressure stabilizing device housing, the pressure stabilizing first interface 42 is adapted to be communicated with the pressure stabilizing chamber 41 and the circulation pipeline 3, and the heating element 44 is disposed in the pressure stabilizing device housing and is used for heating water in the pressure stabilizing chamber 41 at least partially into water vapor.
The water vapor generated in the pressure stabilizing chamber 41 can generate pressure which can act on the circulation line 3 through the pressure stabilizing first port 42 and thus on the entire water electrolysis hydrogen production system 10 through the circulation line 3. That is, the pressure source of the water electrolysis hydrogen production system 10 is the water vapor in the pressure stabilizing chamber 41, so that the system pressure can be generated before the water electrolysis hydrogen production system 10 does not generate oxygen, and the technical problem of insufficient system pressure in the earlier stage of hydrogen production is solved.
The main function of the pressure stabilizing device 4 is to provide a vaporization space and also provide a space for pure water thermal expansion. The bottom of the pressure stabilizing device 4 is provided with a heating element 44, and the heating element 44 can be an electric heater, and the temperature of pure water is increased by electric heating, so that the pressure of a system loop is increased. The pressure stabilizing device 4 maintains the saturation temperature under the corresponding pressure of pure water, so that the hot standby state is realized, and when the system pressure is abnormal, the pressure can be quickly regulated.
According to the water electrolysis hydrogen production system 10 provided by the embodiment of the utility model, the pressure stabilizing device 4 is arranged, so that the pressure source of the whole system is water vapor, and the problem of insufficient system pressure before oxygen is not generated is solved.
In some embodiments of the present utility model, the hydro-electrolytic hydrogen production system 10 may further include a surge tube 6, the surge tube 6 connecting the pressure stabilizing first port 42 to the circulation line 3, in other words, one end of the surge tube 6 is connected to the pressure stabilizing first port 42, and the other end of the surge tube 6 is connected to the circulation line 3. The connection between the fluctuation pipe 6 and the circulation pipe 3 is point a, which is located between the water separation outlet 23 and the cooling device 5, so that the water entering the pressure stabilizing device 4 from the circulation pipe 3 through the fluctuation pipe 6 is water with higher temperature and not cooled, which is beneficial to the generation of water vapor in the pressure stabilizing device 4, and is beneficial to the reduction of the energy consumption of the heating element 44 compared with the introduction of cooling water into the pressure stabilizing device 4, and the generation of water vapor can be faster to establish the system pressure faster. The main function of the fluctuation pipe 6 is to connect the pressure stabilizing device 4 and the circulation pipeline 3, so that water in the circulation pipeline 3 can enter the pressure stabilizing device 4, and the pressure stabilizing device 4 can adjust the pressure of the circulation pipeline 3, thereby adjusting the pressure of the system. The pressure stabilizing first port 42 may be located at the bottom of the pressure stabilizing first port 42 such that water is always present at the pressure stabilizing first port 42 to prevent water vapor from entering the circulation line 3 through the pressure stabilizing first port 42.
In some embodiments of the present utility model, the pressure stabilizing chamber 41 further has a pressure stabilizing second interface 43, that is, the pressure stabilizing device housing is provided with the pressure stabilizing second interface 43 communicating with the pressure stabilizing chamber 41. The second pressure stabilizing interface 43 is connected with the circulating pipeline 3 through the cooling pipeline 7, the connection part of the cooling pipeline 7 and the circulating pipeline 3 is a point B, and the point B is positioned between the cooling device 5 and the inlet 13 of the electrolytic tank 1, so that water entering the pressure stabilizing device 4 from the cooling pipeline 7 is cooling water with lower temperature, the cooling water can play a role in cooling the pressure stabilizing device 4 to reduce the temperature of pure water in the pressure stabilizing device 4, and the pressure of a system loop is reduced. In some embodiments, the regulated second port 43 may be located at the top of the regulated first port 42 such that when cooling water is sprayed into the regulated chamber 41 through the regulated second port 43, the cooling water cools the water at the bottom of the regulated chamber 41 from above the liquid level in the regulated chamber 41.
In some embodiments of the utility model, a cooling regulator valve 71 is provided on the cooling line 7, the cooling regulator valve 71 being used to open the cooling line 7, close the cooling line 7 or regulate the flow of the cooling line 7. Specifically, when it is necessary to introduce cooled water into the pressure stabilizer 4, the cooling regulator valve 71 may be opened so that the cooling line 7 is a passage. When it is not necessary to introduce cooled water into the pressure stabilizing device 4, the cooling regulator valve 71 may be closed to open the cooling line 7. When it is desired to adjust the amount of water introduced into the pressure stabilizing device 4 after cooling, the cooling adjustment valve 71 may be adjusted to be smaller or larger to change the flow rate of water in the cooling line 7. By providing the cooling adjustment valve 71, cooling water can be selectively introduced into the pressure stabilizing device 4 according to actual demands.
In some embodiments of the present utility model, the water electrolysis hydrogen production system 10 may further include a pressure detecting element 45, where the pressure detecting element 45 is configured to detect the pressure of the pressure stabilizing chamber 41, and when the pressure value detected by the pressure detecting element 45 is not lower than a preset pressure threshold value, the cooling regulating valve 71 opens the cooling pipeline 7, and cooling water enters the pressure stabilizing chamber 41 through the cooling pipeline 7 to cool the pressure stabilizing chamber 41; when the pressure in the regulated pressure chamber 41 is lower than a preset pressure threshold, the cooling regulator valve 71 closes the cooling line 7 to raise the temperature of the regulated pressure chamber 41 when the heating member 44 is operated. That is, the cooling line 7 is opened only when the pressure in the pressure stabilizing device 4 is not lower than the preset pressure threshold, and the cooling line 7 is closed when the pressure in the pressure stabilizing device 4 is lower than the preset pressure threshold.
In some embodiments of the present utility model, an atomization spray header 72 is disposed at an end of the cooling pipeline 7 extending into the pressure stabilizing device 4, and water in the cooling pipeline 7 is sprayed into the pressure stabilizing chamber 41 through the atomization spray header 72, that is, the atomization spray header 72 is used to uniformly spray cooling water into the pressure stabilizing chamber 41, and the temperature in the pressure stabilizing chamber 41 can be reduced more uniformly. Alternatively, the atomizing spray header 72 may be located above the liquid level within the regulated pressure chamber 41.
In some embodiments of the present utility model, a pressure relief vent structure 46 is provided on the wall of the regulated pressure chamber 41, and the pressure relief vent structure 46 is intermittently opened, i.e. opened once at intervals, to vent an appropriate amount of gas from the regulated pressure chamber 41. The pressure relief vent structure 46 may be a vent valve for venting accumulated non-condensable gases.
In some embodiments of the present utility model, the water electrolysis hydrogen production system 10 may further include a circulation pump 8, the circulation pump 8 being disposed in the circulation line 3, and the circulation pump 8 being operative to provide motive power for water flow in the circulation line 3, for example, water entering the circulation line 3 from the water separation outlet 23 enters the electrolyzer 1 under the motive power of the circulation pump 8 to participate in electrolysis again.
In some embodiments of the utility model, the circulation pump 8 is located between the water separation outlet 23 and the cooling device 5, the connection point of the surge tube 6 and the circulation line 3 being point a, which is located between the water separation outlet 23 and the circulation pump 8.
In some embodiments of the present utility model, the fluctuation pipe 6 is provided with a temperature detection element 61, and the temperature detection element 61 is used to detect the pipe temperature of the fluctuation pipe 6.
Further, the water electrolysis hydrogen production system 10 further comprises a control device, wherein the temperature detection element 61 and the heating element 44 are connected with the control device, and the control device is used for controlling the heating element 44 to stop working when the temperature detected by the temperature detection element 61 exceeds a preset temperature threshold value.
In some embodiments of the present utility model, the surge tube 6 is provided with a shut-off valve 62, and when the shut-off valve 62 is opened, the surge tube 6 is a passage; when the shut-off valve 62 is closed, the surge tube 6 is opened. When the water electrolysis hydrogen production system 10 is operated, the shut-off valve 62 is in an open state, and the shut-off valve 62 is closed only after the water electrolysis hydrogen production system 10 is stopped.
One specific example of the water electrolysis hydrogen production system 10 of the present utility model is described below.
The water electrolysis hydrogen production system 10 comprises a PEM electrolytic tank 1, a gas-liquid separation device 2, a circulating pipeline 3, a pressure stabilizing device 4, a cooling device 5, a fluctuation pipe 6, a cooling pipeline 7, a circulating pump 8, a second separation device 9, a pressure detection element 45, a temperature detection element 61 and a control device. The PEM electrolyzer 1 has a first outlet 11 and a second outlet 12, the first outlet 11 being an oxygen outlet and the second outlet 12 being a hydrogen outlet, the first outlet 11 discharging a mixture of oxygen and water. The gas-liquid separation device 2 has a separation device inlet 21, a gas separation outlet 22 and a water separation outlet 23, the separation device inlet 21 is communicated with the first outlet 11, the gas-liquid separation device 2 is used for separating the mixture of oxygen and water injected into the gas-liquid separation device 2 from the first outlet 11 into oxygen discharged through the gas separation outlet 22 and water discharged through the water separation outlet 23, the gas separation outlet 22 is connected with a first air outlet pipeline 24, the first air outlet pipeline 24 is further connected with a first air storage tank, and a first air valve 25 is arranged on the first air outlet pipeline 24. The second outlet 12 is connected with the second separation device 9, the second separation device 9 is connected with a second air outlet pipeline 91, the second air outlet pipeline 91 is further connected with a second air storage tank, and a second air valve 92 is arranged on the second air outlet pipeline 91. The circulation pipeline 3 is connected between the water separation outlet 23 and the inlet 13 of the electrolytic tank 1, and the circulation pipeline 3 from the water separation outlet 23 to the inlet 13 of the electrolytic tank 1 is sequentially provided with a circulation pump 8 and a cooling device 5. The pressure stabilizing device 4 is internally provided with a pressure stabilizing cavity 41, the pressure stabilizing cavity 41 is provided with a pressure stabilizing first interface 42 and a pressure stabilizing second interface 43, the pressure stabilizing first interface 42 is communicated with the circulating pipeline 3 through a fluctuation pipe 6, a connecting point of the fluctuation pipe 6 and the circulating pipeline 3 is positioned between the water separation outlet 23 and the circulating pump 8, the pressure stabilizing second interface 43 is connected with the circulating pipeline 3 through a cooling pipeline 7, a connecting part of the cooling pipeline 7 and the circulating pipeline 3 is positioned between the cooling device 5 and the inlet 13 of the electrolytic tank 1, and the cooling pipeline 7 is provided with a cooling regulating valve 71. The pressure stabilizing device 4 comprises a heating element 44, the heating element 44 being arranged to heat the water in the pressure stabilizing chamber 41 at least partly to water vapour. The pressure detecting element 45 is used for detecting the pressure of the pressure stabilizing chamber 41, when the pressure value detected by the pressure detecting element 45 is not lower than a preset pressure threshold value, the cooling regulating valve 71 opens the cooling pipeline 7, and cooling water enters the pressure stabilizing chamber 41 through the cooling pipeline 7 so as to cool the pressure stabilizing chamber 41; when the pressure in the regulated pressure chamber 41 is lower than a preset pressure threshold, the cooling regulator valve 71 closes the cooling line 7 to raise the temperature of the regulated pressure chamber 41 when the heating member 44 is operated. An atomization spray header 72 is arranged at one end of the cooling pipeline 7 extending into the pressure stabilizing device 4, and water of the cooling pipeline 7 is sprayed into the pressure stabilizing cavity 41 through the atomization spray header 72. The pressure-stabilizing chamber 41 is provided with a pressure-releasing and exhausting structure 46 on the cavity wall, and the pressure-releasing and exhausting structure 46 is opened intermittently. The temperature detecting element 61 is used for detecting the pipe temperature of the fluctuation pipe 6, the temperature detecting element 61 and the heating element 44 are electrically connected with a control device, and the control device is used for controlling the heating element 44 to stop working when the temperature detected by the temperature detecting element 61 exceeds a preset temperature threshold value.
The water electrolysis hydrogen production system 10 of the utility model utilizes a liquid phase pressure control system to realize the pressure control of the pure water circulation loop, and utilizes the one-to-one correspondence relationship between the saturated vapor pressure and the temperature of pure water to control the system pressure, so that the system pressure can be established only by pure water before oxygen is not produced.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (11)
1. A water electrolysis hydrogen production system, comprising:
the electrolytic tank is provided with a first outlet and a second outlet, one of the first outlet and the second outlet is an oxygen outlet, and the other is a hydrogen outlet;
a gas-liquid separation device having a separation device inlet, a gas separation outlet, and a water separation outlet, the separation device inlet being in communication with the first outlet, the gas-liquid separation device being for separating a gas-liquid mixture injected into the gas-liquid separation device from the first outlet into a gas discharged through the gas separation outlet and water discharged through the water separation outlet;
the circulating pipeline is connected between the water separation outlet and the inlet of the electrolytic tank, and a cooling device is arranged in the circulating pipeline;
the pressure stabilizing device is internally provided with a pressure stabilizing chamber, the pressure stabilizing chamber is provided with a pressure stabilizing first interface, the pressure stabilizing first interface is communicated with the circulating pipeline, and the pressure stabilizing chamber is internally suitable for generating water vapor.
2. The water and electricity hydrogen production system of claim 1 further comprising a surge tube connecting the pressure stabilizing first interface to the circulation line, the junction of the surge tube and the circulation line being located between the water separation outlet and the cooling device.
3. The water electrolysis hydrogen production system of claim 1, wherein the pressure stabilizing chamber further has a pressure stabilizing second port, the pressure stabilizing second port being connected to the circulation line via a cooling line, the connection of the cooling line to the circulation line being located between the cooling device and the inlet of the electrolyzer.
4. A water electrolysis hydrogen production system according to claim 3, wherein a cooling regulating valve is provided on the cooling line for opening the cooling line, closing the cooling line or regulating the flow rate of the cooling line.
5. The hydrogen production system according to claim 4, further comprising a pressure detection element for detecting a pressure of the pressure stabilizing chamber, wherein the cooling regulator valve opens the cooling line when a pressure value detected by the pressure detection element is not lower than a preset pressure threshold value; and when the pressure in the pressure stabilizing cavity is lower than the preset pressure threshold value, the cooling regulating valve closes the cooling pipeline.
6. A water electrolysis hydrogen production system according to claim 3, wherein an atomizing spray header is provided at one end of the cooling pipe extending into the pressure stabilizing device.
7. The water electrolysis hydrogen production system of claim 1, wherein a pressure relief vent structure is provided on a cavity wall of the pressure stabilizing chamber, the pressure relief vent structure being intermittently opened.
8. The water and electricity hydrogen production system of claim 2, further comprising a circulation pump disposed in the circulation line and configured to provide motive force for water flow in the circulation line.
9. The water electrolysis hydrogen production system of claim 8, wherein said circulation pump is located between said water separation outlet and said cooling device, and wherein a junction of said surge tube and said circulation line is located between said water separation outlet and said circulation pump.
10. The water electrolysis hydrogen production system according to claim 2, wherein a temperature detection element is provided on the fluctuation pipe for detecting a pipe temperature of the fluctuation pipe.
11. The hydrogen production system of claim 10, wherein said pressure stabilizing device comprises a heating element for heating water in said pressure stabilizing chamber at least partially to steam, said hydrogen production system further comprising a control device, said temperature detecting element and said heating element both being connected to said control device, said control device being configured to control said heating element to stop operation when said temperature detected by said temperature detecting element exceeds a preset temperature threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320155051.6U CN220685266U (en) | 2023-01-16 | 2023-01-16 | Water electrolysis hydrogen production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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