CN220685262U - Hydrogen production system - Google Patents
Hydrogen production system Download PDFInfo
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- CN220685262U CN220685262U CN202321457440.0U CN202321457440U CN220685262U CN 220685262 U CN220685262 U CN 220685262U CN 202321457440 U CN202321457440 U CN 202321457440U CN 220685262 U CN220685262 U CN 220685262U
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 222
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 222
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 65
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 183
- 239000001301 oxygen Substances 0.000 claims abstract description 183
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 183
- 239000007789 gas Substances 0.000 claims abstract description 95
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 46
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 42
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 150000002431 hydrogen Chemical class 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 description 23
- 239000003792 electrolyte Substances 0.000 description 10
- 239000012071 phase Substances 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000011244 liquid electrolyte Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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 application discloses a hydrogen production system, which belongs to the technical field of electrolytic hydrogen production. The hydrogen production system comprises an electrolysis device, an oxygen collection and treatment device and a dehydrogenation device, wherein the electrolysis device is provided with an oxygen side output port, the oxygen side output port is used for outputting an oxygen-containing mixture, the oxygen collection and treatment device is communicated with the oxygen side output port and is used for treating the oxygen-containing mixture to obtain first gas, the first gas is mixed gas containing hydrogen and oxygen, the dehydrogenation device is communicated with the oxygen collection and treatment device and is used for reducing the concentration of the hydrogen in the first gas, and at least part of the hydrogen in the first gas is removed through the dehydrogenation device, so that the concentration of the hydrogen in the first gas is reduced, the content of the hydrogen meets the standard, and the safety risk existing in the operation of the hydrogen production system is reduced. In addition, when renewable energy sources are adopted to supply power for the electrolysis device, the hydrogen production system can better adapt to the power fluctuation range of the renewable energy sources, the utilization rate of the renewable energy sources is improved, and the hydrogen production system is energy-saving and environment-friendly.
Description
Technical Field
The application belongs to the technical field of electrolytic hydrogen production, and particularly relates to a hydrogen production system.
Background
Along with development of technology, renewable energy sources are gradually applied to industrial production, for example, electrolytic water hydrogen production, when renewable energy sources such as photovoltaic and wind power are applied to hydrogen production, because the power of electric energy generated by the renewable energy sources is unstable, mixed gas output by an oxygen output side of electrolytic water hydrogen production equipment not only contains oxygen but also is mixed with hydrogen, and the content of the hydrogen exceeds the standard, so that the operation of a hydrogen production system is at safety risk.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a hydrogen production system, which solves the technical problems that in the prior art, electric energy generated by renewable energy sources is used for providing electric energy for electrolytic water hydrogen production equipment, so that the content of hydrogen output by an oxygen output side exceeds the standard, and the safety risk exists in the operation of the hydrogen production system.
In a first aspect, the present application provides a hydrogen production system comprising:
an electrolysis device having an oxygen side output for outputting an oxygen-containing mixture;
the oxygen collecting and treating device is communicated with the oxygen side output port and is used for treating the oxygen-containing mixture to obtain first gas, wherein the first gas is mixed gas containing hydrogen and oxygen; the method comprises the steps of,
and the dehydrogenation device is communicated with the oxygen collection and treatment device and is used for reducing the concentration of hydrogen in the first gas.
According to the hydrogen production system, at least part of hydrogen in the first gas is removed through the dehydrogenation device, so that the concentration of the hydrogen in the first gas is reduced, the content of the hydrogen meets the standard, and the safety risk existing in the operation of the hydrogen production system is reduced. In addition, when renewable energy sources are adopted to supply power for the electrolysis device, the hydrogen production system can better adapt to the power fluctuation range of the renewable energy sources, the utilization rate of the renewable energy sources is improved, and the hydrogen production system is energy-saving and environment-friendly.
According to one embodiment of the application, the output port of the oxygen collecting and treating device is communicated with a first output pipeline, the other end of the first output pipeline is provided with a first branch pipeline and a second branch pipeline, the first branch pipeline is used for being communicated with the atmosphere or purifying equipment, the second branch pipeline is provided with a switch valve, and the output port of the second branch pipeline is communicated with the dehydrogenation device; and/or the number of the groups of groups,
the dehydrogenation unit includes a dehydrogenation column.
According to an embodiment of the present application, the hydrogen concentration detection device is further provided, and the hydrogen concentration detection device is installed on the first output pipeline and is used for detecting the concentration of the hydrogen in the mixed gas.
According to one embodiment of the present application, the hydrogen concentration detection apparatus includes a hydrogen analyzer.
According to one embodiment of the present application, the oxygen collection device further comprises an oxygen delivery device for delivering a second gas containing oxygen to the oxygen collection device so that the second gas is mixed with the first gas to reduce the concentration of hydrogen in the oxygen collection device; and/or the number of the groups of groups,
the electrolysis device comprises a plurality of electrolysis cells, and a plurality of electrolysis cells are arranged in parallel.
According to one embodiment of the present application, the delivery inlet of the oxygen delivery device is in communication with the output of the dehydrogenation device and the delivery outlet of the oxygen delivery device is in communication with the input of the oxygen collection treatment device.
According to one embodiment of the present application, the oxygen delivery device comprises:
the first oxygen heat exchanger is communicated with the output port of the dehydrogenation device;
the first oxygen gas-water separator is communicated with a first heat exchange output port of the first oxygen heat exchanger;
the compression inlet of the compressor is communicated with the first separation output port of the first oxygen-gas-water separator, and the compression outlet of the compressor is communicated with the input port of the oxygen collecting and processing device.
According to one embodiment of the present application, the oxygen collection treatment device includes:
an oxygen separator communicated with an oxygen side output port of the electrolysis device;
the oxygen scrubber is communicated with a separation output port of the oxygen separator;
the second oxygen heat exchanger is communicated with a washing output port of the oxygen washer;
the second oxygen gas-water separator is communicated with a second heat exchange output port of the second oxygen heat exchanger, and a second separation output port of the second oxygen gas-water separator is communicated with the dehydrogenation device.
According to one embodiment of the application, the oxygen separator further comprises a pressure transmitter, wherein the pressure transmitter is arranged on the oxygen separator.
According to one embodiment of the present application, the electrolysis device further has a hydrogen side output for outputting a hydrogen-containing mixture;
the hydrogen production system further comprises a hydrogen collection and treatment device, wherein the hydrogen collection and treatment device is communicated with the hydrogen side output port and is used for treating the hydrogen-containing mixture to obtain third gas, and the third gas is mixed gas containing hydrogen.
According to one embodiment of the present application, the hydrogen collection processing apparatus includes:
the hydrogen separator is communicated with the hydrogen side output port;
the hydrogen scrubber is communicated with a separation output port of the hydrogen separator;
the hydrogen heat exchanger is communicated with a washing output port of the hydrogen washer;
the hydrogen gas-water separator is communicated with a heat exchange output port of the hydrogen heat exchanger, and a separation air outlet of the hydrogen gas-water separator is communicated with the atmosphere or purifying equipment.
According to one embodiment of the present application, the apparatus further comprises a liquid collection and treatment device, wherein the liquid collection and treatment device is used for collecting the first liquid discharged by the oxygen separator and the second liquid discharged by the hydrogen separator, and cooling the first liquid and the second liquid to convey the first liquid and the second liquid to the electrolysis device.
According to one embodiment of the present application, the liquid collection and treatment device includes:
the input ports of the liquid circulating pump are communicated with the oxygen separator and the hydrogen separator;
the input port of the liquid heat exchanger is communicated with the output port of the liquid circulating pump, and the output port of the liquid heat exchanger is communicated with the liquid input port of the electrolysis device.
Additional aspects and advantages of the application 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 application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is a schematic diagram of an embodiment of a hydrogen production system provided herein;
FIG. 2 is a schematic structural view of another embodiment of a hydrogen production system provided herein.
Reference numerals:
hydrogen production system 100;
an electrolysis device 110 and an electrolysis cell 111;
an oxygen collection treatment device 120, a first output pipe 121, a first branch pipe 122, a second branch pipe 123, an oxygen separator 124, an oxygen scrubber 125, a second oxygen heat exchanger 126, and a second oxygen gas-water separator 127;
a dehydrogenation unit 130 and a dehydrogenation tower 131;
a switch valve 140;
a hydrogen concentration detection means 150;
a pressure regulating valve 160;
an oxygen delivery device 170, a first oxygen heat exchanger 171, a first oxygen gas-water separator 172, and an oxygen compressor 173;
a pressure transmitter 180;
a hydrogen collection and treatment device 190, a hydrogen separator 191, a hydrogen scrubber 192, a hydrogen heat exchanger 193 and a hydrogen heat exchanger 194;
a liquid circulation pump 101 and a liquid heat exchanger 102;
and a control device 103.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The application discloses a hydrogen production system.
A hydrogen production system according to an embodiment of the present application is described below with reference to fig. 1 and 2.
As shown in fig. 1-2, hydrogen production system 100 includes an electrolysis device 110, an oxygen collection treatment device 120, and a dehydrogenation device 130.
The electrolyzer 110 has an oxygen side outlet for outputting an oxygen containing mixture.
The electrolysis device 110 includes an electrolysis cell 111, and when the electrolysis cell 111 filled with the electrolyte is powered on, water molecules electrochemically react on the electrodes to be decomposed into hydrogen and oxygen. In the embodiment of the application, the electric energy generated by renewable energy sources such as photovoltaic, wind power and the like is used for supplying power for the electrolytic tank 111, so that the energy is saved and the environment is protected.
Referring to fig. 1, in an embodiment, one electrolysis tank 111 is provided, so that the electrolysis of water to produce hydrogen and oxygen can be realized through renewable energy power supply, and the method is energy-saving and environment-friendly. In addition, referring to fig. 2, in another embodiment, the electrolysis device 110 may further include a plurality of electrolysis cells 111, the plurality of electrolysis cells 111 are arranged in parallel, and electrolysis of water is performed simultaneously through the plurality of electrolysis cells 111, thereby improving the efficiency of producing hydrogen and oxygen. In particular, in the embodiments of the present application, four electrolytic cells 111 are provided, but of course in other embodiments, two, three, or five electrolytic cells 111 may be provided, and in particular, the present application is not limited thereto.
The oxygen collecting and treating device 120 is connected to the oxygen side outlet, and is used for treating the oxygen-containing mixture to obtain a first gas, wherein the first gas is a mixed gas containing hydrogen and oxygen.
After electrolysis, the oxygen-side output port outputs an oxygen-containing mixture as a gas-liquid two-phase mixture, and the oxygen collecting and treating device 120 is used for treating the oxygen-containing mixture, including separating gas-phase substances from liquid-phase substances, washing the gas-phase substances, cooling and removing water vapor in the gas-phase substances to obtain low-temperature dried first gas.
The dehydrogenation unit 130 is in communication with the oxygen collection treatment unit 120 for reducing the concentration of hydrogen in the first gas.
The principle of reducing the concentration of hydrogen in the mixed gas by the dehydrogenation unit 130 is various, in one embodiment, the dehydrogenation unit 130 may use heating to remove hydrogen, and in other embodiments, the dehydrogenation unit may also use catalyst to remove hydrogen or remove hydrogen through chemical reaction, which is not limited in this application. Specifically, in the embodiment of the present application, the dehydrogenation device 130 includes the dehydrogenation tower 131, and the technology of the dehydrogenation tower 131 is already mature, and the specific working principle is not described in detail herein again.
According to hydrogen production system 100 of the present application, at least a portion of the hydrogen in the first gas is removed by dehydrogenation unit 130, thereby reducing the concentration of hydrogen in the first gas, so that the hydrogen content meets the standard, and reducing the safety risk existing in operation of hydrogen production system 100. In addition, when renewable energy sources are adopted to supply power to the electrolysis device 110, the hydrogen production system 100 can better adapt to the power fluctuation range of the renewable energy sources, so that the utilization rate of the renewable energy sources is improved, and the energy-saving and environment-friendly effects are achieved.
In one embodiment, the output port of the oxygen collecting and treating device 120 is connected to a first output pipeline 121, the other end of the first output pipeline 121 is provided with a first branch pipeline 122 and a second branch pipeline 123, the first branch pipeline 122 is used for being communicated with the atmosphere or purifying equipment, the second branch pipeline 123 is provided with a switch valve 140, and the output port of the second branch pipeline 123 is communicated with the dehydrogenation device 130.
In this embodiment, after the concentration of the hydrogen in the first gas output from the first output pipe 121 reaches the standard, the switch valve 140 on the second branch pipe 123 is in a closed state, so that the first gas can be directly discharged from the first branch pipe 122 to the atmosphere or conveyed into the purifying apparatus, which is safe and reliable. In addition, when the concentration of the hydrogen in the first gas output in the first output pipeline 121 does not meet the standard, the switch valve 140 on the second branch pipeline 123 is in an open state, so that the amount of the first gas conveyed by the first branch pipeline 122 is reduced, a part of the first gas is conveyed from the second branch pipeline 123 and is processed by the dehydrogenation device 130, so that the content of the hydrogen in the first gas is reduced, the content of the hydrogen in the first gas reaches the standard, and the safety risk existing in the operation of the hydrogen production system 100 is reduced.
In one embodiment, the hydrogen production system 100 further includes a hydrogen concentration detection device 150, where the hydrogen concentration detection device 150 is installed on the first output pipe 121 to detect the concentration of hydrogen in the mixed gas.
The hydrogen concentration detection means 150 is provided on the first output pipe 121 to check the concentration of hydrogen in the first gas supplied in the first output pipe 121 in real time, so as to selectively open or close the on-off valve 140 according to the detected concentration of hydrogen.
It should be noted that, the hydrogen concentration detection apparatus 150 may be of various types, for example, in one embodiment, the hydrogen concentration detection apparatus 150 includes a hydrogen analyzer, which is a specially-developed digital thermal conductivity type hydrogen analyzer. Can be used for continuously measuring the concentration of hydrogen produced by various industrial processes or laboratories. The instrument adopts a digital processing technology, and the functions of zero point calibration, measuring range calibration, linearization processing, temperature compensation, switching value output control, current output, system setting and the like of the instrument all use the digital processing technology. Of course, in other embodiments, the apparatus for checking the hydrogen concentration may also be other apparatus, and in particular, the present application is not limited thereto.
The hydrogen production system 100 further comprises an oxygen delivery device 170, wherein the oxygen delivery device 170 is used for delivering the second gas containing oxygen to the oxygen collection and treatment device 120, and when the second gas is mixed with the first gas, the concentration of hydrogen in the oxygen collection and treatment device 120 is reduced, so that safety accidents can be avoided to a certain extent when the hydrogen production system 100 is operated.
In the electrolytic water reaction, the volume ratio of the generated hydrogen to the generated oxygen is 2:1, the oxygen-containing second gas is forced into the oxygen separator by the oxygen delivery device 170 such that the ratio of hydrogen to oxygen approaches 1:1, thereby ensuring the operation of the hydrogen production system to be more stable.
Referring to fig. 1, the delivery inlet of the oxygen delivery device 170 is connected to the output port of the dehydrogenation device 130, and the delivery outlet of the oxygen delivery device 170 is connected to the input port of the oxygen collection processing device 120, so that after the dehydrogenation device 130 acts, the mixed gas with reduced hydrogen concentration is a second gas, and the second gas can be delivered into the oxygen collection processing device 120 and mixed with the first gas in the oxygen collection processing device 120, so that the concentration of hydrogen in the oxygen collection processing device 120 is reduced, safety accidents can be avoided to a certain extent when the hydrogen production system 100 operates, the operation is simple, and wide power operation of renewable energy sources is realized.
In one embodiment, the oxygen delivery device 170 includes a first oxygen heat exchanger 171, a first oxygen gas-water separator 172, and an oxygen compressor 173.
The first oxygen heat exchanger 171 is in communication with the output of the dehydrogenation unit 130.
Because in the embodiment of the application, the dehydrogenation device 130 adopts a heating and dehydrogenation mode, so that the temperature of the second gas obtained after the dehydrogenation device 130 reduces the concentration of the hydrogen in the first gas is higher, and the second gas is subjected to heat exchange and temperature reduction through the first oxygen heat exchanger 171, so that the phenomenon that the normal use of the subsequent treatment equipment is influenced due to the fact that the temperature of the second gas is too high is avoided.
It should be noted that the types of the first oxygen heat exchanger 171 may be various, for example, in an embodiment, the first oxygen heat exchanger 171 may include a fin-tube heat exchanger. Of course, in other embodiments, the type of the first oxygen heat exchanger 171 may be selected according to need, which is not limited in this application.
The first oxygen gas-water separator 172 communicates with the first heat exchange output of the first oxygen heat exchanger 171.
Because in the embodiment of the application, the dehydrogenation device 130 adopts a heating and dehydrogenation mode, so that the dehydrogenation device 130 reduces the concentration of hydrogen in the first gas to obtain the second gas and/or has moisture after passing through the first oxygen heat exchanger 171, and the first oxygen gas-water separator 172 separates the moisture in the second gas, thereby improving the drying degree of the second gas and reducing the phenomenon that the second gas is watered.
The types of the first oxygen-gas-water separator 172 may be various, for example, the first oxygen-gas-water separator 172 may include a tube separator, a shutter separator, a cyclone separator, or the like, and the types of the first oxygen-gas-water separator 172 are not limited in this application.
The oxygen compressor 173, the compression inlet of the oxygen compressor 173 is communicated with the first separation output port of the first oxygen-gas-water separator 172, and the compression outlet of the oxygen compressor 173 is communicated with the input port of the oxygen collecting and treating device 120.
The second gas with low pressure is lifted to the second gas with high pressure by the oxygen compressor 173, so that the second gas can flow to the oxygen collecting and treating device 120 to provide circulating power, and the structure is simple.
In one embodiment, the oxygen collection treatment device 120 includes an oxygen separator 124, an oxygen scrubber 125, a second oxygen heat exchanger 126, and a second oxygen gas-water separator 127.
The oxygen separator 124 communicates with the oxygen side outlet of the electrolyzer 110.
Since the oxygen-containing mixture output from the oxygen side output of the electrolyzer 110 includes a first substance in a gaseous phase and containing oxygen and a second substance in a liquid phase, separation of the first and second substances is achieved by the oxygen separator 124, which facilitates subsequent processing by the oxygen collection processor 120 to obtain a first gas. In addition, because the oxygen separator belongs to the prior art and the related technology is mature, the principles of the oxygen separator are not repeated herein.
An oxygen scrubber 125 is in communication with the separate output of the oxygen separator 124.
Because the first substance separated by the oxygen separator 124 also contains the liquid electrolyte when the hydrogen production system 100 is used for producing hydrogen by electrolysis, the content of the liquid electrolyte in the first substance is reduced by the oxygen scrubber 125 under the action of the oxygen scrubber 125, so that impurities can be reduced to a certain extent, the recovery and the recycling of the electrolyte are realized, and the loss and the running cost of the electrolyte of the electrolytic water hydrogen production system 100 can be greatly reduced. Meanwhile, the temperature of the gas is reduced, the burden of a subsequent gas cooler is reduced, and the temperature and the humidity of the final finished gas are further reduced.
In the embodiment of the present application, the electrolyte electrolyzed by the electrolysis device 110 is alkaline solution, however, in other embodiments, the electrolyte may also be pure water, and the present application is not limited thereto.
The second oxygen heat exchanger 126 is in communication with a wash output of the oxygen scrubber 125.
The first oxygen heat exchanger 171 is used for exchanging heat and cooling the gas delivered by the oxygen scrubber 125, so that the influence on the normal use of subsequent treatment equipment due to the overhigh temperature of the gas is avoided.
It should be noted that the types of the second oxygen heat exchanger 126 are various, for example, in an embodiment, the second oxygen heat exchanger 126 may include a fin-tube heat exchanger. Of course, in other embodiments, the type of the second oxygen heat exchanger 126 may be selected according to need, which is not limited in this application.
The second oxygen gas-water separator 127 is in communication with a second heat exchange output of the second oxygen heat exchanger 126, and a second separation output of the second oxygen gas-water separator 127 is in communication with the dehydrogenation unit 130.
The second oxygen-gas separator 127 removes water vapor from the gas output from the second oxygen heat exchanger 126, thereby improving the dryness of the gas and reducing the phenomenon of water entrainment in the gas.
The second oxygen-gas-water separator 127 may be of various types, for example, the second oxygen-gas-water separator 127 may include a tube separator, a shutter separator, a cyclone separator, or the like, and the type of the second oxygen-gas-water separator 127 is not limited in this application.
In one embodiment, hydrogen production system 100 further includes a pressure transmitter 180, pressure transmitter 180 being positioned in oxygen separator 124.
The pressure transducer 180 is a device that converts pressure into a pneumatic or electric signal for control and remote transmission. The pressure transmitter 180 can convert physical pressure parameters such as gas, liquid, etc., sensed by the load cell sensor into standard electrical signals for supply to secondary meters such as an indication alarm, recorder, regulator, etc., for measurement, indication, and process adjustment. The pressure transmitter 180 is arranged on the oxygen separator 124, in the application, the hydrogen production system 100 further comprises a pressure regulating valve 160, the pressure regulating valve 160 is arranged on the first branch pipeline 122, the opening degree of the pressure regulating valve 160 is controlled through the comparison of the pressure transmitter 180 on the upper part of the oxygen separator 124 and the set pressure, the timely discharge of the gas in the oxygen separator 124 is realized, and the occurrence of safety accidents due to the overlarge air pressure in the oxygen separator 124 is avoided.
In one embodiment, the hydrogen production system 100 further includes a pressure regulating valve 160, where the pressure regulating valve 160 is disposed in the first branch pipe 122, and the pressure regulating valve 160 is configured to control the pressure transmitter 180 to a set value, and if the hydrogen in the first gas conveyed in the first branch pipe 122 is found to exceed the standard, the on-off valve 140, the dehydrogenation device 130 and the oxygen compressor 173 are opened to reduce the hydrogen content in the first gas.
In an embodiment, the electrolysis device 110 further has a hydrogen side output port, the hydrogen side output port is used for outputting a hydrogen-containing mixture, the hydrogen production system 100 further includes a hydrogen collecting and processing device 190, the hydrogen collecting and processing device 190 is communicated with the hydrogen side output port, and the hydrogen-containing mixture is processed by the hydrogen collecting and processing device 190 to obtain a third gas, where the third gas is a mixed gas containing hydrogen, so that the structure is simple.
After electrolysis, the hydrogen-side output port outputs a mixture containing hydrogen as a gas-liquid two-phase mixture, and the hydrogen collecting and treating device 190 is used for treating the mixture containing hydrogen, including separating gas-phase substances from liquid-phase substances, washing the gas-phase substances, cooling and removing water vapor in the gas-phase substances to obtain a third gas dried at a low temperature.
Specifically, the hydrogen collection and treatment device 190 includes a hydrogen separator 191, a hydrogen scrubber 192, a hydrogen heat exchanger 193, and a hydrogen gas-water separator 194.
The hydrogen separator 191 communicates with the hydrogen side output port.
Since the hydrogen-containing mixture output from the hydrogen side output of the electrolyzer 110 includes the third substance and the fourth substance, the third substance is in a gas phase and contains hydrogen, and the fourth substance is in a liquid state, specifically, the separation of the third substance and the fourth substance is achieved by the hydrogen separator 191, so that the subsequent hydrogen collection and treatment device 190 can conveniently process the third substance to obtain the third gas.
The hydrogen scrubber 192 is in communication with a separate output of the hydrogen separator 191.
Since the third substance separated by the hydrogen separator 191 further contains the liquid electrolyte when the hydrogen production system 100 is used for producing hydrogen by electrolysis, the third substance passes through the hydrogen scrubber 192, and the content of the liquid electrolyte in the third substance can be reduced under the action of the hydrogen scrubber 192, so that impurities can be reduced to a certain extent. Can realize the recovery and the reuse of the electrolyte and can greatly reduce the loss and the running cost of the electrolyte of the electrolytic water hydrogen production system 100. Meanwhile, the temperature of the gas is reduced, the burden of a subsequent gas cooler is reduced, and the temperature and the humidity of the final finished gas are further reduced.
In the embodiment of the present application, the electrolyte electrolyzed by the electrolysis device 110 is alkaline solution, however, in other embodiments, the electrolyte may also be pure water, and the present application is not limited thereto.
The hydrogen heat exchanger 193 communicates with the purge output of the hydrogen scrubber 192.
The heat exchange and the temperature reduction are carried out on the gas conveyed by the hydrogen scrubber 192 through the hydrogen heat exchanger 193, so that the phenomenon that the normal use of subsequent treatment equipment is influenced due to the fact that the temperature of the gas is too high is avoided.
It should be noted that the hydrogen heat exchanger 193 may be of various kinds, for example, in an embodiment, the hydrogen heat exchanger 193 may include a fin-tube heat exchanger. Of course, in other embodiments, the type of the hydrogen heat exchanger 193 may be selected according to need, which is not limited in this application.
The hydrogen gas-water separator 194 is communicated with a heat exchange output port of the hydrogen heat exchanger 193, and a separation air outlet of the hydrogen gas-water separator 194 is communicated with the atmosphere or purifying equipment.
The hydrogen gas-water separator 194 removes water vapor from the gas output from the hydrogen heat exchanger 193, thereby improving the dryness of the gas and reducing the phenomenon of water entrainment of the gas.
The hydrogen gas-water separator 194 may be of various kinds, for example, the hydrogen gas-water separator 194 may include a tube separator, a shutter separator, a cyclone separator, or the like, and the kind of the second oxygen gas-water separator 127 is not limited in this application.
The hydrogen production system 100 further includes a liquid collecting and processing device, which is configured to collect the first liquid discharged from the oxygen separator 124 and the second liquid discharged from the hydrogen separator 191, and cool the first liquid and the second liquid, so as to convey the first liquid and the second liquid to the electrolysis device 110, so that the electrolyte can be recycled, and the cost is saved.
In one embodiment, the liquid collection treatment apparatus includes a liquid circulation pump 101 and a liquid heat exchanger 102.
The input of the liquid circulation pump 101 is communicated with the oxygen separator 124 and the hydrogen separator 191.
The first liquid and the second liquid are conveyed back to the electrolysis device 110 through the liquid circulating pump 101 to provide power, so that the first liquid and the second liquid can be recycled, and the cost is saved.
The input of the liquid heat exchanger 102 is communicated with the output of the liquid circulation pump 101, and the output of the liquid heat exchanger 102 is communicated with the liquid input of the electrolyzer 110.
The temperature of the first liquid and the second liquid is reduced by the liquid heat exchanger 102, so that the influence on the operation of the electrolysis device 110 caused by the overhigh temperature of the first liquid and the second liquid is avoided.
In addition, referring to fig. 1, the hydrogen production system 100 further includes a control device 103, where the control device 103 is electrically connected to the oxygen compressor 173, the pressure transmitter 180, the on-off valve 140, the hydrogen concentration detection device 150, the pressure regulating valve 160, and the dehydrogenation device 130, and the opening degree of the pressure regulating valve 160 is controlled by comparing the pressure transmitter 180 at the upper part of the oxygen separator 124 with a set pressure, when the hydrogen production system 100 operates at a load of 30% -110% or the hydrogen content displayed by the hydrogen concentration detection device 150 is less than 1.8%, the control device 103 controls the on-off valve 140, the dehydrogenation device 130, and the oxygen compressor 173 to be closed, otherwise, the on-off valve 140, the dehydrogenation device 130, and the oxygen compressor 173 are opened, so that the indication number of the hydrogen concentration detection device 150 is ensured to be less than 1.8%, and the safe operation of the hydrogen production system 100 is ensured. In addition, the oxygen dehydrogenation process can be automatically switched according to the state of the device, so that unnecessary energy consumption is avoided.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, "a first feature", "a second feature" may include one or more of the features.
In the description of the present application, the meaning of "plurality" is two or more.
In the description of this application, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact by another feature therebetween.
In the description of this application, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative 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 application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A hydrogen production system, comprising:
an electrolysis device having an oxygen side output for outputting an oxygen-containing mixture;
the oxygen collecting and treating device is communicated with the oxygen side output port and is used for treating the oxygen-containing mixture to obtain first gas, wherein the first gas is mixed gas containing hydrogen and oxygen; the method comprises the steps of,
and the dehydrogenation device is communicated with the oxygen collection and treatment device and is used for reducing the concentration of hydrogen in the first gas.
2. The hydrogen production system of claim 1, wherein the output port of the oxygen collection treatment device is communicated with a first output pipeline, the other end of the first output pipeline is provided with a first branch pipeline and a second branch pipeline, the first branch pipeline is used for being communicated with the atmosphere or purifying equipment, the second branch pipeline is provided with a switch valve, and the output port of the second branch pipeline is communicated with the dehydrogenation device; and/or the number of the groups of groups,
the dehydrogenation unit includes a dehydrogenation column.
3. The hydrogen production system of claim 2, further comprising a hydrogen concentration detection device mounted on the first output line for detecting the concentration of hydrogen in the mixed gas.
4. A hydrogen production system as in claim 3 wherein said hydrogen concentration detection means comprises a hydrogen analyzer.
5. The hydrogen production system of any one of claims 1 to 4, further comprising an oxygen delivery device to deliver a second gas containing oxygen to the oxygen collection processing device such that the second gas mixes with the first gas to reduce the concentration of hydrogen within the oxygen collection processing device; and/or the number of the groups of groups,
the electrolysis device comprises a plurality of electrolysis cells, and a plurality of electrolysis cells are arranged in parallel.
6. The hydrogen production system of claim 5, wherein the delivery inlet of the oxygen delivery device is in communication with the output of the dehydrogenation device and the delivery outlet of the oxygen delivery device is in communication with the input of the oxygen collection treatment device.
7. The hydrogen production system of claim 6, wherein the oxygen delivery device comprises:
the first oxygen heat exchanger is communicated with the output port of the dehydrogenation device;
the first oxygen gas-water separator is communicated with a first heat exchange output port of the first oxygen heat exchanger;
the compression inlet of the compressor is communicated with the first separation output port of the first oxygen-gas-water separator, and the compression outlet of the compressor is communicated with the input port of the oxygen collecting and processing device.
8. The hydrogen production system of any one of claims 1 to 4, wherein the oxygen collection treatment device comprises:
an oxygen separator communicated with an oxygen side output port of the electrolysis device;
the oxygen scrubber is communicated with a separation output port of the oxygen separator;
the second oxygen heat exchanger is communicated with a washing output port of the oxygen washer;
the second oxygen gas-water separator is communicated with a second heat exchange output port of the second oxygen heat exchanger, and a second separation output port of the second oxygen gas-water separator is communicated with the dehydrogenation device.
9. The hydrogen production system of claim 8, further comprising a pressure transmitter disposed in the oxygen separator.
10. The hydrogen production system of claim 8, wherein the electrolyzer further has a hydrogen side output for outputting a hydrogen-containing mixture;
the hydrogen production system further comprises a hydrogen collection and treatment device, wherein the hydrogen collection and treatment device is communicated with the hydrogen side output port and is used for treating the hydrogen-containing mixture to obtain third gas, and the third gas is mixed gas containing hydrogen.
11. The hydrogen production system of claim 10, wherein the hydrogen collection processing apparatus comprises:
the hydrogen separator is communicated with the hydrogen side output port;
the hydrogen scrubber is communicated with a separation output port of the hydrogen separator;
the hydrogen heat exchanger is communicated with a washing output port of the hydrogen washer;
the hydrogen gas-water separator is communicated with a heat exchange output port of the hydrogen heat exchanger, and a separation air outlet of the hydrogen gas-water separator is communicated with the atmosphere or purifying equipment.
12. The hydrogen production system of claim 11, further comprising a liquid collection treatment device to collect the first liquid discharged from the oxygen separator and the second liquid discharged from the hydrogen separator and to cool the first liquid and the second liquid for delivery to the electrolyzer.
13. The hydrogen production system of claim 12, wherein the liquid collection treatment apparatus comprises:
the input ports of the liquid circulating pump are communicated with the oxygen separator and the hydrogen separator;
the input port of the liquid heat exchanger is communicated with the output port of the liquid circulating pump, and the output port of the liquid heat exchanger is communicated with the liquid input port of the electrolysis device.
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| CN202321457440.0U CN220685262U (en) | 2023-06-07 | 2023-06-07 | Hydrogen production system |
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