CN115234308A - Pressure energy recycling system for hydrogen production by water electrolysis - Google Patents
Pressure energy recycling system for hydrogen production by water electrolysis Download PDFInfo
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- CN115234308A CN115234308A CN202211009790.0A CN202211009790A CN115234308A CN 115234308 A CN115234308 A CN 115234308A CN 202211009790 A CN202211009790 A CN 202211009790A CN 115234308 A CN115234308 A CN 115234308A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 189
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 189
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 174
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 69
- 238000004064 recycling Methods 0.000 title claims abstract description 51
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 42
- 239000001301 oxygen Substances 0.000 claims abstract description 109
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 109
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000000926 separation method Methods 0.000 claims description 33
- 239000003792 electrolyte Substances 0.000 claims description 18
- 150000002431 hydrogen Chemical class 0.000 claims description 16
- 238000000746 purification Methods 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000006227 byproduct Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The embodiment of the invention provides a pressure energy recycling system for hydrogen production by water electrolysis, and relates to the technical field of hydrogen production by alkaline water electrolysis. The water electrolysis hydrogen production pressure energy recycling system comprises a medium-pressure water electrolysis hydrogen production system and a pressure energy recycling system; the pressure energy recycling system comprises an oxygen pipeline, an oxygen buffer tank, an expander, a circulating water cooler and an oxygen blow-down pipe which are connected in sequence, wherein the oxygen pipeline is connected to the medium-pressure water electrolysis hydrogen production system; the pressure energy recycling system further comprises a hydrogen pipeline, a hydrogen compressor and a pressurized hydrogen delivery pipeline which are sequentially connected, wherein the expander and the hydrogen compressor are coaxially arranged, and the hydrogen pipeline is connected to the medium-pressure water electrolysis hydrogen production system. The system can solve the problem of waste caused by directly emptying the byproduct oxygen in the process of producing hydrogen by electrolyzing water, and can also reduce the energy consumption of the system for producing hydrogen by electrolyzing water.
Description
Technical Field
The invention relates to the technical field of hydrogen production by alkaline electrolysis of water, in particular to a pressure energy recycling system for hydrogen production by electrolysis of water.
Background
The water electrolysis hydrogen production technology can be used for consuming intermittent and large-fluctuation renewable energy power such as wind power, photovoltaic and the like, and is regarded as a long-period and large-scale energy storage means with the greatest prospect in the field of renewable energy development.
With the continuous maturity of the water electrolysis hydrogen production technology, the commercialization popularization degree is also continuously increased, but the water electrolysis hydrogen production energy consumption is high, and in most commercial water electrolysis hydrogen production projects, oxygen generated by consuming a large amount of electric energy is generally directly discharged and discarded as a byproduct, or is liquefied to be prepared into liquid oxygen for sale, if the oxygen is directly discharged, the oxygen and a large amount of available pressure contained in the oxygen cannot be effectively utilized, so that great waste is caused, if the liquid oxygen is prepared, the project energy consumption and cost are further increased, and new problems are caused in the transportation and sale of the liquid oxygen. Therefore, how to better utilize the byproduct oxygen of the electrolyzed water becomes a dilemma.
Disclosure of Invention
The invention aims to provide a pressure energy recycling system for hydrogen production by water electrolysis, which can solve the problem of waste caused by direct emptying of byproduct oxygen in the hydrogen production process by water electrolysis and can reduce the energy consumption of a hydrogen production system by water electrolysis.
Embodiments of the invention may be implemented as follows:
the invention provides a water electrolysis hydrogen production pressure energy recycling system, which comprises a medium-pressure water electrolysis hydrogen production system and a pressure energy recycling system;
the pressure energy recycling system comprises an oxygen pipeline, an oxygen buffer tank, an expander, a circulating water cooler and an oxygen vent pipe which are connected in sequence, wherein the oxygen pipeline is connected to the medium-pressure electrolyzed water hydrogen production system;
the pressure energy recycling system further comprises a hydrogen pipeline, a hydrogen compressor and a pressurized hydrogen delivery pipeline which are sequentially connected, wherein the expander and the hydrogen compressor are coaxially arranged, and the hydrogen pipeline is connected to the medium-pressure water electrolysis hydrogen production system.
In an optional embodiment, the medium-pressure water electrolysis hydrogen production system comprises a medium-pressure alkaline electrolytic cell, a hydrogen separation cooler, an oxygen separation cooler, an alkali liquor water cooler, an alkali liquor circulating pump and a hydrogen purification device;
the medium-pressure alkaline electrolytic cell is connected to a hydrogen separation cooler and an oxygen separation cooler, the hydrogen separation cooler and the oxygen separation cooler are connected to the medium-pressure alkaline electrolytic cell through an alkaline liquid water cooler and an alkaline liquid circulating pump, the hydrogen separation cooler is connected to a hydrogen compressor through a hydrogen purification device, and the oxygen separation cooler is connected to an oxygen buffer tank.
In an optional embodiment, water in the medium-pressure alkaline electrolytic cell is electrolyzed to generate hydrogen and oxygen, electrolyte containing the hydrogen enters a hydrogen separation cooler, the hydrogen and the electrolyte are separated, the electrolyte sequentially passes through an alkali liquor water cooler and an alkali liquor circulating pump and flows back to the medium-pressure alkaline electrolytic cell, the hydrogen enters a hydrogen purification device, and the hydrogen is purified and then sent to a pressure energy recycling system; the electrolyte containing oxygen enters an oxygen separation cooler, the oxygen and the electrolyte are separated, the electrolyte flows back to a medium-pressure alkaline electrolytic cell through an alkaline liquid water cooler and an alkaline liquid circulating pump in sequence, and the oxygen enters a pressure energy recycling system.
In an optional embodiment, hydrogen of the medium-pressure water electrolysis hydrogen production system is connected with a hydrogen compressor of the pressure energy recycling system through a hydrogen pipeline; the oxygen of the medium-pressure water electrolysis hydrogen production system is connected with an oxygen buffer tank of the pressure energy recycling system through an oxygen pipeline, and provides power for the pressure energy recycling system.
In an alternative embodiment, the hydrogen gas passing through the hydrogen line and the oxygen gas passing through the oxygen line are at the same pressure, and both are between 1.6MPa and 10MPa.
In an optional embodiment, an oxygen purity detector is arranged between the oxygen buffer tank and the expander, a hydrogen purity detector is arranged between the hydrogen purification device and the hydrogen compressor, a regulating valve is arranged between the oxygen buffer tank and the expander, a regulating valve is arranged between the hydrogen purification device and the hydrogen compressor, and a hand valve is arranged between the expander and the circulating water cooler.
In an optional embodiment, the oxygen stabilized by the oxygen buffer tank enters an expander after purity detection, the expander converts the pressure energy of the oxygen into mechanical energy, the oxygen out of the expander enters a circulating water cooler to cool circulating water, and then the oxygen is exhausted through an oxygen vent pipe; the mechanical energy generated by the expander drives the hydrogen compressor to work, so that the hydrogen generated by the electrolyzed water is pressurized and then is sent out as a product through a pressurized hydrogen delivery pipeline.
In an optional embodiment, the circulating water cooler is a shell-and-tube heat exchanger, a shell pass inlet of the circulating water cooler is connected with a circulating water return pipeline of the electrolyzed water hydrogen production system, and a shell pass outlet of the circulating water cooler is connected with an inlet pipeline of a circulating water cooling tower of the electrolyzed water hydrogen production system.
In an alternative embodiment, the pipeline surface between the expander and the circulating water cooler is wrapped with heat and cold insulation cotton.
In an alternative embodiment, the hydrogen compressor is a reciprocating compressor, and the hydrogen compressor and the expander are driven by a mechanical connection, so that the expander drives the hydrogen compressor to work.
The system for recycling the pressure energy for hydrogen production by electrolyzing water provided by the embodiment of the invention has the beneficial effects that:
the waste oxygen pressure energy in the hydrogen production process by electrolyzing water can be recycled, the process is simple, and firstly, the mechanical energy after oxygen expansion can be used for providing power for the hydrogen compressor; secondly, the cold energy after oxygen expansion can be utilized to cool the circulating water of the electrolyzed water hydrogen production system, so that the energy consumption of the circulating water cooling tower is reduced, and the purposes of energy conservation and consumption reduction are achieved; and thirdly, the hydrogen compressor is directly driven by the mechanical energy converted by the expander without being driven by a motor, so that the energy utilization efficiency is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic composition diagram of a system for recycling pressure energy generated by hydrogen production through electrolyzed water according to an embodiment of the present invention.
Icon: 100-medium pressure water electrolysis hydrogen production system; 101-alkaline electrolysis cell; 102-a hydrogen separation cooler; 103-an oxygen separation cooler; 104-an alkali liquor water cooler; 105-circulation pump of lye; 106-a hydrogen purification unit; 200-a pressure energy recycling system; 201-an oxygen buffer tank; 202-an expander; 203-circulating water cooler; 204-a hydrogen compressor; 205-an oxygen line; 206-oxygen vent pipe; 207-hydrogen line; 208-pressurized hydrogen export line.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, the embodiment provides a system for recycling pressure energy for hydrogen production from electrolyzed water, and the system for recycling pressure energy for hydrogen production from electrolyzed water includes a medium-pressure system 100 for hydrogen production from electrolyzed water and a pressure energy recycling system 200.
The pressure energy recycling system 200 comprises an oxygen pipeline 205, an oxygen buffer tank 201, an expander 202, a circulating water cooler 203 and an oxygen vent pipe 206 which are connected in sequence, wherein the oxygen pipeline 205 is connected to the medium-pressure electrolyzed water hydrogen production system 100.
The pressure energy recycling system 200 further comprises a hydrogen pipeline 207, a hydrogen compressor 204 and a pressurized hydrogen delivery pipeline 208 which are connected in sequence, wherein the expander 202 and the hydrogen compressor 204 are coaxially arranged, and the hydrogen pipeline 207 is connected to the medium-pressure water electrolysis hydrogen production system 100.
The medium-pressure water electrolysis hydrogen production system 100 comprises a medium-pressure alkaline electrolytic tank 101, a hydrogen separation cooler 102, an oxygen separation cooler 103, an alkaline water cooler 104, an alkaline circulating pump 105 and a hydrogen purification device 106.
Specifically, the medium-pressure alkaline electrolyzer 101 is connected to a hydrogen separation cooler 102 and an oxygen separation cooler 103, the hydrogen separation cooler 102 and the oxygen separation cooler 103 are connected to the medium-pressure alkaline electrolyzer 101 through a lye water cooler 104 and a lye circulating pump 105, the hydrogen separation cooler 102 is connected to a hydrogen compressor 204 through a hydrogen purification device 106, and the oxygen separation cooler 103 is connected to an oxygen buffer tank 201.
Water in the medium-pressure alkaline electrolytic tank 101 is electrolyzed to generate hydrogen and oxygen, electrolyte containing the hydrogen enters a hydrogen separation cooler 102, the hydrogen and the electrolyte are separated, the electrolyte sequentially flows back to the medium-pressure alkaline electrolytic tank 101 through an alkaline water cooler 104 and an alkaline circulating pump 105, the hydrogen enters a hydrogen purification device 106, and is sent to a pressure energy recycling system 200 after being purified; the electrolyte containing oxygen enters an oxygen separation cooler 103, the oxygen and the electrolyte are separated, the electrolyte sequentially flows back to a medium-pressure alkaline electrolytic tank 101 through an alkaline water cooler 104 and an alkaline circulating pump 105, and the oxygen enters a pressure energy recycling system 200.
The hydrogen of the medium-pressure water electrolysis hydrogen production system 100 is connected with a hydrogen compressor 204 of the pressure energy recycling system 200 through a hydrogen pipeline 207; the oxygen of the medium-pressure water electrolysis hydrogen production system 100 is connected with the oxygen buffer tank 201 of the pressure energy recycling system 200 through an oxygen pipeline 205 and provides power for the pressure energy recycling system 200; the pressure of the hydrogen and the oxygen are the same and are both 1.6MPa to 10MPa.
An oxygen purity detector (not shown in the figure) is arranged between the oxygen buffer tank 201 and the expander 202, a hydrogen purity detector (not shown in the figure) is arranged between the hydrogen purification device 106 and the hydrogen compressor 204, a regulating valve (not shown in the figure) is arranged between the oxygen buffer tank 201 and the expander 202, a regulating valve (not shown in the figure) is arranged between the hydrogen purification device 106 and the hydrogen compressor 204, and a hand valve (not shown in the figure) is arranged between the expander 202 and the circulating water cooler 203.
The oxygen passes through the oxygen separation cooler 103 and then is sent into an oxygen buffer tank 201 for pressure stabilization, the oxygen enters an expander 202 after purity detection to convert pressure energy into mechanical energy, the low-temperature oxygen out of the expander 202 enters a circulating water cooler 203 to cool circulating water, and then the oxygen is exhausted through an oxygen exhaust pipe 206; the mechanical energy generated by the expander 202 drives the hydrogen compressor 204 to work, so that the hydrogen generated by the electrolyzed water is further pressurized and then is sent out as a product through a pressurized hydrogen delivery pipeline 208.
The circulating water cooler 203 is a shell-and-tube heat exchanger, a shell pass inlet of the circulating water cooler 203 is connected with a circulating water return pipeline of the electrolyzed water hydrogen production system, and a shell pass outlet of the circulating water cooler 203 is connected with an inlet pipeline (not shown in the figure) of a circulating water cooling tower of the electrolyzed water hydrogen production system.
Preferably, the pipeline between the expander 202 and the circulating water cooler 203 is covered with heat and cold insulation cotton (not shown).
Preferably, the expander 202 is a turbine expander 202.
Preferably, the hydrogen compressor 204 is a reciprocating compressor, and the hydrogen compressor 204 and the expander 202 are driven by a mechanical connection (not shown), so that the expander 202 drives the compressor to operate, thereby compressing hydrogen.
Example (b):
taking the medium-pressure water electrolysis hydrogen production system 100 with the hydrogen production scale of 50MW as an example, the hydrogen production of the system is 10000m 3 H, oxygen production of 5000m 3 The consumption of the circulating water is about 15t/h, and the product hydrogen is sent to a downstream ammonia synthesis device.
In the pressure energy recycling system for hydrogen production by electrolyzing water, the pressure of oxygen entering the oxygen buffer tank 201 is 1.6MPa, the temperature is 80 ℃, and the flow is 5000m 3 H; taking the isentropic efficiency of the expander 202 as 75%, reducing the pressure of oxygen after the oxygen passes through the expander 202 to 0.3MPa, reducing the temperature to about 15 ℃, introducing the low-temperature and low-pressure oxygen into the tube side of the circulating water cooler 203, exchanging heat with circulating return water at 0.3MPa and 40 ℃ entering the shell side of the circulating water cooler 203, cooling the circulating return water to 34 ℃, and then sending the circulating return water to a circulating water cooling tower of the electrolyzed water hydrogen production system for further cooling to 32 ℃ so as to meet the requirement of the temperature of circulating feed water of the electrolyzed water hydrogen production system; meanwhile, the expander 202 drives the hydrogen compressor 204 to work, and the 1.6MPa hydrogen entering the hydrogen compressor 204 is pressurized to 5.5MPa and then is sent out to a downstream ammonia synthesis device to be used as a chemical raw material.
The beneficial effects of the pressure energy recycling system for hydrogen production by electrolyzing water provided by the embodiment include:
the waste oxygen pressure energy in the hydrogen production process by water electrolysis can be recycled, the process is simple, and firstly, the mechanical energy generated after oxygen expansion can be used for providing power for the hydrogen compressor 204; secondly, the cold energy after oxygen expansion can be utilized to cool the circulating water of the electrolyzed water hydrogen production system, so that the energy consumption of the circulating water cooling tower is reduced, and the purposes of energy conservation and consumption reduction are achieved; thirdly, the hydrogen compressor 204 is directly driven by the mechanical energy converted by the expander 202 without being driven by a motor, so that the energy utilization efficiency is higher.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The pressure energy recycling system for hydrogen production by water electrolysis is characterized by comprising a medium-pressure water electrolysis hydrogen production system (100) and a pressure energy recycling system (200);
the pressure energy recycling system (200) comprises an oxygen pipeline (205), an oxygen buffer tank (201), an expansion machine (202), a circulating water cooler (203) and an oxygen blow-down pipe (206) which are connected in sequence, wherein the oxygen pipeline (205) is connected to the medium-pressure electrolyzed water hydrogen production system (100);
the pressure energy recycling system (200) further comprises a hydrogen pipeline (207), a hydrogen compressor (204) and a pressurized hydrogen delivery pipeline (208) which are sequentially connected, wherein the expander (202) and the hydrogen compressor (204) are coaxially arranged, and the hydrogen pipeline (207) is connected to the medium-pressure water electrolysis hydrogen production system (100).
2. The pressure energy recycling system for hydrogen production by water electrolysis according to claim 1, wherein the medium-pressure system (100) for hydrogen production by water electrolysis comprises a medium-pressure alkaline electrolytic cell (101), a hydrogen separation cooler (102), an oxygen separation cooler (103), an alkaline water cooler (104), an alkaline circulation pump (105) and a hydrogen purification device (106);
the medium-pressure alkaline electrolysis tank (101) is connected to the hydrogen separation cooler (102) and the oxygen separation cooler (103), the hydrogen separation cooler (102) and the oxygen separation cooler (103) are connected to the medium-pressure alkaline electrolysis tank (101) through the lye water cooler (104) and the lye circulating pump (105), the hydrogen separation cooler (102) is connected to the hydrogen compressor (204) through the hydrogen purification device (106), and the oxygen separation cooler (103) is connected to the oxygen buffer tank (201).
3. The system for recycling the pressure energy for hydrogen production by electrolyzing water as claimed in claim 2, wherein the water in the medium-pressure alkaline electrolytic tank (101) is electrolyzed to generate hydrogen and oxygen, the electrolyte containing hydrogen enters the hydrogen separation cooler (102), the hydrogen and the electrolyte are separated, the electrolyte sequentially passes through the alkali liquor water cooler (104) and the alkali liquor circulating pump (105) and flows back to the medium-pressure alkaline electrolytic tank (101), the hydrogen enters the hydrogen purification device (106), and the hydrogen is purified and then sent to the pressure energy recycling system (200); and the electrolyte containing oxygen enters the oxygen separation cooler (103), the oxygen and the electrolyte are separated, the electrolyte sequentially flows back to the medium-pressure alkaline electrolytic cell (101) through the alkaline water cooler (104) and the alkaline circulating pump (105), and the oxygen enters the pressure energy recycling system (200).
4. The pressure energy recycling system for hydrogen production by water electrolysis according to claim 1, wherein the hydrogen gas of the medium-pressure hydrogen production system (100) is connected with the hydrogen compressor (204) of the pressure energy recycling system (200) through the hydrogen pipeline (207); the oxygen of the medium-pressure water electrolysis hydrogen production system (100) is connected with the oxygen buffer tank (201) of the pressure energy recycling system (200) through the oxygen pipeline (205), and provides power for the pressure energy recycling system (200).
5. The pressure energy recycling system for hydrogen production by water electrolysis according to claim 4, wherein the pressure of the hydrogen passing through the hydrogen pipeline (207) and the pressure of the oxygen passing through the oxygen pipeline (205) are the same and are both 1.6MPa to 10MPa.
6. The system for recycling the pressure energy of hydrogen production through electrolysis of water as claimed in claim 2, wherein an oxygen purity detector is arranged between the oxygen buffer tank (201) and the expander (202), a hydrogen purity detector is arranged between the hydrogen purification device (106) and the hydrogen compressor (204), a regulating valve is arranged between the oxygen buffer tank (201) and the expander (202), a regulating valve is arranged between the hydrogen purification device (106) and the hydrogen compressor (204), and a hand valve is arranged between the expander (202) and the circulating water cooler (203).
7. The system for recycling the pressure energy of hydrogen production from electrolyzed water as defined in claim 1, wherein the oxygen stabilized by the oxygen buffer tank (201) enters the expander (202) after purity detection, the expander (202) converts the pressure energy of the oxygen into mechanical energy, the oxygen discharged from the expander (202) enters the circulating water cooler (203) to cool the circulating water, and then is discharged through the oxygen discharge pipe (206); the mechanical energy generated by the expansion machine (202) drives the hydrogen compressor (204) to work, so that the hydrogen generated by the electrolyzed water is pressurized and then is sent out as a product through the pressurized hydrogen delivery pipeline (208).
8. The pressure energy recycling system for hydrogen production by electrolyzed water according to claim 1, wherein the circulating water cooler (203) is a shell-and-tube heat exchanger, a shell-side inlet of the circulating water cooler (203) is connected with a circulating water return pipeline of the hydrogen production by electrolyzed water system, and a shell-side outlet of the circulating water cooler (203) is connected with an inlet pipeline of a circulating water cooling tower of the hydrogen production by electrolyzed water system.
9. The pressure energy recycling system for hydrogen production by electrolyzing water as claimed in claim 1, wherein the pipeline surface between the expander (202) and the circulating water cooler (203) is wrapped with heat insulation cotton.
10. The hydrogen production pressure energy recycling system by electrolyzing water as claimed in claim 1, wherein the hydrogen compressor (204) is a reciprocating compressor, and the hydrogen compressor (204) and the expander (202) are driven by a mechanical connection, so that the expander (202) drives the hydrogen compressor (204) to operate.
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4107277A (en) * | 1976-07-13 | 1978-08-15 | Da Rosa Aldo Vieira | Process for production of ammonia |
| US4530744A (en) * | 1983-03-10 | 1985-07-23 | Smith Eric M | Method and apparatus for the producing of liquid hydrogen |
| JPH08203547A (en) * | 1995-01-26 | 1996-08-09 | Mitsubishi Heavy Ind Ltd | Solid polymer type fuel cell system |
| US20070001462A1 (en) * | 2003-04-15 | 2007-01-04 | H-Empower Corp. | Integrated renewable energy system |
| US20080047502A1 (en) * | 2006-08-23 | 2008-02-28 | Michael Russo | Hybrid Cycle Electrolysis Power System with Hydrogen & Oxygen Energy Storage |
| EP2138678A1 (en) * | 2008-06-25 | 2009-12-30 | Siemens Aktiengesellschaft | Energy storage system and method for storing and supplying energy |
| US20100025232A1 (en) * | 2008-07-29 | 2010-02-04 | Gm Global Technology Operations, Inc. | Recovering the compression energy in gaseous hydrogen and oxygen generated from high-pressure water electrolysis |
| JP2013227634A (en) * | 2012-04-26 | 2013-11-07 | Mitsubishi Heavy Ind Ltd | Gas production system and method for operating gas production system |
| JP2014118618A (en) * | 2012-12-18 | 2014-06-30 | Mitsubishi Heavy Ind Ltd | Water electrolytic hydrogen-oxygen energy storage system and method for storing water electrolytic hydrogen-oxygen energy |
| WO2016001155A1 (en) * | 2014-07-01 | 2016-01-07 | Siemens Aktiengesellschaft | Method for operating an electrolytic system and electrolytic system |
| DE102015007732A1 (en) * | 2015-06-16 | 2016-12-22 | Linde Aktiengesellschaft | Oxygen expander (electrolysis) for cooling the production and compression process |
| US20160369411A1 (en) * | 2015-01-21 | 2016-12-22 | Nareshkumar Bernard Handagama | Solar powered systems and methods for generating hydrogen gas and oxygen gas from water |
| CA3010590A1 (en) * | 2016-01-04 | 2017-07-13 | Electricite De France | System for producing dihydrogen, and associated method |
| US20170314144A1 (en) * | 2016-04-29 | 2017-11-02 | Chun-Yi Yu | Seawater Electrolysis Hydrogen Recovery And Power Generation System |
| WO2021170590A1 (en) * | 2020-02-26 | 2021-09-02 | Doosan Lentjes Gmbh | Method for storing energy and energy storing system |
| CN114508699A (en) * | 2022-02-18 | 2022-05-17 | 国网江苏电力设计咨询有限公司 | Comprehensive energy supply system for hydrogen production and hydrogenation by ammonia cracking |
| CN114695934A (en) * | 2022-04-07 | 2022-07-01 | 国网江苏电力设计咨询有限公司 | Hydrogen production and power generation dual-mode system utilizing renewable resources |
| WO2022170390A1 (en) * | 2021-02-10 | 2022-08-18 | Good Water Energy Ltd | A geothermal hydrogen production system |
-
2022
- 2022-08-22 CN CN202211009790.0A patent/CN115234308A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4107277A (en) * | 1976-07-13 | 1978-08-15 | Da Rosa Aldo Vieira | Process for production of ammonia |
| US4530744A (en) * | 1983-03-10 | 1985-07-23 | Smith Eric M | Method and apparatus for the producing of liquid hydrogen |
| JPH08203547A (en) * | 1995-01-26 | 1996-08-09 | Mitsubishi Heavy Ind Ltd | Solid polymer type fuel cell system |
| US20070001462A1 (en) * | 2003-04-15 | 2007-01-04 | H-Empower Corp. | Integrated renewable energy system |
| US20080047502A1 (en) * | 2006-08-23 | 2008-02-28 | Michael Russo | Hybrid Cycle Electrolysis Power System with Hydrogen & Oxygen Energy Storage |
| EP2138678A1 (en) * | 2008-06-25 | 2009-12-30 | Siemens Aktiengesellschaft | Energy storage system and method for storing and supplying energy |
| US20100025232A1 (en) * | 2008-07-29 | 2010-02-04 | Gm Global Technology Operations, Inc. | Recovering the compression energy in gaseous hydrogen and oxygen generated from high-pressure water electrolysis |
| JP2013227634A (en) * | 2012-04-26 | 2013-11-07 | Mitsubishi Heavy Ind Ltd | Gas production system and method for operating gas production system |
| JP2014118618A (en) * | 2012-12-18 | 2014-06-30 | Mitsubishi Heavy Ind Ltd | Water electrolytic hydrogen-oxygen energy storage system and method for storing water electrolytic hydrogen-oxygen energy |
| WO2016001155A1 (en) * | 2014-07-01 | 2016-01-07 | Siemens Aktiengesellschaft | Method for operating an electrolytic system and electrolytic system |
| US20160369411A1 (en) * | 2015-01-21 | 2016-12-22 | Nareshkumar Bernard Handagama | Solar powered systems and methods for generating hydrogen gas and oxygen gas from water |
| DE102015007732A1 (en) * | 2015-06-16 | 2016-12-22 | Linde Aktiengesellschaft | Oxygen expander (electrolysis) for cooling the production and compression process |
| CA3010590A1 (en) * | 2016-01-04 | 2017-07-13 | Electricite De France | System for producing dihydrogen, and associated method |
| US20170314144A1 (en) * | 2016-04-29 | 2017-11-02 | Chun-Yi Yu | Seawater Electrolysis Hydrogen Recovery And Power Generation System |
| WO2021170590A1 (en) * | 2020-02-26 | 2021-09-02 | Doosan Lentjes Gmbh | Method for storing energy and energy storing system |
| WO2022170390A1 (en) * | 2021-02-10 | 2022-08-18 | Good Water Energy Ltd | A geothermal hydrogen production system |
| CN114508699A (en) * | 2022-02-18 | 2022-05-17 | 国网江苏电力设计咨询有限公司 | Comprehensive energy supply system for hydrogen production and hydrogenation by ammonia cracking |
| CN114695934A (en) * | 2022-04-07 | 2022-07-01 | 国网江苏电力设计咨询有限公司 | Hydrogen production and power generation dual-mode system utilizing renewable resources |
Non-Patent Citations (2)
| Title |
|---|
| 佚名: "国产首套氢气膨胀机组在杭氧膨胀机公司研制成功", 深冷技术, no. 02, 30 April 2015 (2015-04-30), pages 68 * |
| 佚名: "杭氧自主研发的氢气增压透平膨胀机组成功开车", 深冷技术, no. 05, 31 October 2015 (2015-10-31), pages 11 * |
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