CN114574874A - Water electrolysis hydrogen production system and heat management system thereof - Google Patents
Water electrolysis hydrogen production system and heat management system thereof Download PDFInfo
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- CN114574874A CN114574874A CN202210192184.0A CN202210192184A CN114574874A CN 114574874 A CN114574874 A CN 114574874A CN 202210192184 A CN202210192184 A CN 202210192184A CN 114574874 A CN114574874 A CN 114574874A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 85
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 83
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 66
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 98
- 238000011084 recovery Methods 0.000 claims abstract description 69
- 239000002918 waste heat Substances 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims description 78
- 238000005338 heat storage Methods 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 21
- 239000003513 alkali Substances 0.000 claims description 19
- 230000008929 regeneration Effects 0.000 claims description 19
- 238000011069 regeneration method Methods 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 18
- 238000004321 preservation Methods 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000006392 deoxygenation reaction Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 16
- 238000000926 separation method Methods 0.000 description 12
- 230000001172 regenerating effect Effects 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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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
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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
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/021—Process control or regulation of heating or cooling
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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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/67—Heating or cooling means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/005—Central heating systems using heat accumulated in storage masses water heating system with recuperation of waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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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
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Abstract
The invention discloses a hydrogen production system by electrolyzing water and a heat management system thereof, which comprises a waste heat recovery circulating pipeline, wherein a first heat exchange unit, a second heat exchange unit and a circulating power source are arranged on the waste heat recovery circulating pipeline; the first heat exchange unit is used for carrying out heat exchange and cooling on the water electrolysis hydrogen production system through a heat exchange medium; the second heat exchange unit is used for supplying heat energy to the target terminal through a heat exchange medium; the circulating power source is used for conveying the heat exchange medium flowing through the first heat exchange unit to the second heat exchange unit through the waste heat recovery circulating pipeline. According to the heat management system, the first heat exchange unit absorbs heat energy generated by the water electrolysis hydrogen production system, the heat exchange medium absorbing the heat energy is conveyed to the second heat exchange unit through the waste heat recovery circulation pipeline, and the second heat exchange unit supplies the heat energy to the target terminal, so that the heat energy generated by the water electrolysis hydrogen production system can be fully utilized, the energy utilization rate is improved, and the energy consumption loss is reduced.
Description
Technical Field
The invention relates to the technical field of hydrogen production by water electrolysis, in particular to a hydrogen production system by water electrolysis and a thermal management system thereof.
Background
In the process of hydrogen production by water electrolysis, a large amount of unused low-temperature waste heat exists. At present, the waste heat generated in the hydrogen production system is obtained by heat exchange of cooling liquid to obtain the cooling liquid (30-80 ℃) with certain temperature. However, the part of heat finally enters the hydrogen production system again to cool the alkali liquor and the gas after being cooled by equipment such as a water cooling tower and the like, so that the waste heat generated in the system is continuously taken away, and therefore, the part of waste heat is not utilized completely, which undoubtedly results in low energy utilization rate and large energy loss.
In conclusion, how to solve the problems of low energy utilization rate and large energy consumption loss in the process of hydrogen production by water electrolysis becomes a problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a water electrolysis hydrogen production system and a heat management system thereof, so as to solve the problems of low energy utilization rate and large energy loss in the water electrolysis hydrogen production process.
In order to achieve the purpose, the invention provides the following technical scheme:
the heat management system of the water electrolysis hydrogen production system comprises a waste heat recovery circulating pipeline, wherein a first heat exchange unit, a second heat exchange unit and a circulating power source are arranged on the waste heat recovery circulating pipeline; the first heat exchange unit is used for carrying out heat exchange and cooling on the water electrolysis hydrogen production system through a heat exchange medium; the second heat exchange unit is used for supplying heat energy to the target terminal through the heat exchange medium; the circulating power source is used for conveying the heat exchange medium flowing through the first heat exchange unit to the second heat exchange unit through the waste heat recovery circulating pipeline.
Optionally, the first heat exchange unit comprises a lye heat exchanger for cooling lye separated by the water electrolysis hydrogen production system.
Optionally, the second heat exchange unit includes a first heat exchange device, a heat grade conversion device, and a second heat exchange device connected in series in sequence, where the heat grade conversion device is configured to convert a heat exchange medium output by the first heat exchange device from low-grade heat to usable high-grade heat.
Optionally, the heat grade conversion device includes heat storage tank and heat pump set, the heat storage tank is used for collecting the heat transfer medium of first heat transfer device output, heat pump set be used for with the heat transfer medium in the heat storage tank is changed into usable high-grade heat by low-grade heat, the circulation power supply set up in the heat storage tank with on second heat transfer device's the connecting pipeline.
Optionally, the first heat exchanging device comprises a heating heat exchanger and a heat tracing heat exchanger which are connected in series in sequence.
Optionally, an inlet and an outlet of the heating heat exchanger are communicated through a first bypass pipeline, and the first bypass pipeline is provided with a first bypass valve.
Optionally, the inlet and the outlet of the heat tracing heat exchanger are communicated through a second bypass pipeline, and a second bypass valve is arranged on the second bypass pipeline.
Optionally, an inlet and an outlet of the second heat exchanging device are communicated through a third bypass pipeline, and a third bypass valve is arranged on the third bypass pipeline.
Optionally, the first heat exchange unit further comprises a cooling heat exchanger arranged in parallel with the lye heat exchanger, the cooling heat exchanger comprises at least one of a first cooling heat exchanger and a second cooling heat exchanger, wherein the first cooling heat exchanger is a primary deoxidizing cooling heat exchanger for cooling the gas after crude hydrogen deoxidization; the second cooling heat exchanger comprises a plurality of regeneration primary cooling heat exchangers used for cooling the regeneration gas of the drying tower.
Optionally, the first cooling heat exchanger and the second cooling heat exchanger are arranged in series or in parallel.
Optionally, when the first cooling heat exchanger and the second cooling heat exchanger are arranged in parallel, a first input control valve is arranged on a heat exchange medium input pipeline of the alkali liquor heat exchanger, a second input control valve is arranged on a heat exchange medium input pipeline of the cooling heat exchanger, corresponding heat exchange control valves are respectively arranged on heat exchange medium input pipelines of the regeneration primary cooling heat exchangers, and the heat exchange control valves are only opened in a regeneration link executed by the drying tower.
Optionally, the second heat exchange unit comprises a low-grade heat recovery unit connected in series to the waste heat recovery circulation pipeline.
Optionally, the low-grade heat recovery unit is at least used for heat preservation heat tracing of the pipeline and/or the water tank to be insulated.
Optionally, an inlet and an outlet of the low-grade heat recovery unit are communicated through a fourth bypass pipeline, and a fourth bypass valve is arranged on the fourth bypass pipeline.
Optionally, the second heat exchange unit further includes a high-grade heat recovery unit disposed on the waste heat recovery circulation pipeline and arranged in parallel with the low-grade heat recovery unit.
Optionally, the high-grade heat recovery unit comprises a heat grade conversion device, a first circulation pump body and a high-grade heat exchanger which are connected in series in sequence;
the heat grade conversion device is used for converting the heat exchange medium output by the first heat exchange unit from low-grade heat into usable high-grade heat;
the first circulation pump body is used for conveying a heat exchange medium with high-grade heat to the high-grade heat exchanger.
Optionally, the high-grade heat recovery unit further includes a fifth bypass pipeline, a return port is further provided on the heat grade conversion device, and an output pipeline of the high-grade heat exchanger is communicated with the return port through the fifth bypass pipeline.
Optionally, the high-grade heat exchanger comprises at least one of a heating plant and a heating plant.
Optionally, the high-grade heat exchanger includes a heating device and a heating device, and the heating device are sequentially arranged in series or in parallel.
Optionally, an inlet and an outlet of the heating device are communicated through a sixth bypass pipeline, and a sixth bypass valve is arranged on the sixth bypass pipeline.
Optionally, the number of the heating devices is multiple and arranged in parallel.
Optionally, the inlet and the outlet of the heating device are communicated through a seventh bypass pipeline, and a seventh bypass valve is arranged on the seventh bypass pipeline.
Optionally, a control valve bank is arranged on an output pipeline of the first heat exchange unit, and the control valve bank has a first working state, a second working state and a third working state; when the control valve bank is in a first working state, an output pipeline of the first heat exchange unit is independently communicated with the low-grade heat recovery unit; when the control valve group is in a second working state, the output pipeline of the first heat exchange unit is independently conducted with the high-grade heat recovery unit; when the control valve group is in a third working state, the output pipeline of the first heat exchange unit is communicated with the low-grade heat recovery unit and the high-grade heat recovery unit.
Optionally, a cooling tower is further disposed on the waste heat recovery circulation pipeline, the cooling tower is located at the upstream of the first heat exchange unit, and the circulation power source is disposed on a connection pipeline between the cooling tower and the first heat exchange unit.
Compared with the introduction content of the background technology, the heat management system of the electrolyzed water hydrogen production system comprises a waste heat recovery circulation pipeline, wherein a first heat exchange unit, a second heat exchange unit and a circulation power source are arranged on the waste heat recovery circulation pipeline; the first heat exchange unit is used for carrying out heat exchange and cooling on the water electrolysis hydrogen production system through a heat exchange medium; the second heat exchange unit is used for supplying heat energy to the target terminal through a heat exchange medium; the circulating power source is used for conveying the heat exchange medium flowing through the first heat exchange unit to the second heat exchange unit through the waste heat recovery circulating pipeline. This heat management system, in the practical application in-process, the heat transfer medium circulation flow in the waste heat recovery circulating line under the effect of circulation power supply, the heat transfer medium that flows through first heat transfer unit can carry out the heat transfer cooling to electrolytic water hydrogen production system, thereby make heat transfer medium can absorb the heat energy that electrolytic water hydrogen production system produced, the heat transfer medium who absorbs the heat energy passes through waste heat recovery circulating line and carries to second heat transfer unit, supply heat energy to target terminal by second heat transfer unit, thereby can be to the heat energy make full use of that electrolytic water hydrogen production system produced, energy utilization is promoted, energy consumption loss has been reduced.
In addition, the invention also provides a water electrolysis hydrogen production system, which comprises a heat management system, wherein the heat management system is the heat management system of the water electrolysis hydrogen production system described in any scheme. Because the thermal management system has the technical effects, the system for producing hydrogen by electrolyzing water with the thermal management system also has the corresponding technical effects, which are not described herein again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a first structural arrangement of a thermal management system of a hydrogen production system by electrolyzing water according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second structural arrangement of a thermal management system of a hydrogen production system by electrolyzing water according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a third structural arrangement of the thermal management system of the system for producing hydrogen by electrolyzing water according to the embodiment of the present invention.
Wherein, in fig. 1-3:
1-an electrolytic cell; 2-a hydrogen separation scrubber; 3-an oxygen separation scrubber; 4-a water cooling tower; 5. 26, 27-cooling water circulating pump; 6-alkali liquor heat exchanger; 7-an alkali liquor circulating pump; 8-a deoxygenation reactor; 9-deoxidation first-stage cooling heat exchanger; 15. 18, 23-regenerating a primary cooling heat exchanger; 10. 16, 19, 22-secondary cooling heat exchanger; 11. 17, 20, 21-gas-water separator; 12. 13, 14-drying tower; 24-a heat storage tank; 25-a heat pump; 28-a controller; 29-a heating heat exchanger; 30-heat tracing heat exchanger; 31-a heating device; v1 — first input control valve; v2 — first cooling control valve; v3 — second cooling control valve; v4 — third cooling control valve; v5-first open/close control valve; v6-second open/close control valve; V7-Low grade Heat Outlet valve; V8-Low grade Heat Inlet valve; v9-third opening/closing control valve; v10-fourth by-pass valve; v11-fifth bypass valve; v12 — first control valve; v13-heating output valve; v14-heating input valve; v15-heated outlet valve; v16-heated inlet valve; v17-seventh bypass valve; v18-sixth bypass valve; v20 — first bypass valve; v21-heating inlet valve; v22-heating outlet valve; v23-second bypass valve; v24-heat tracing inlet valve; v25-heat traced outlet valve; v26-third bypass valve; v27-heat exchange inlet valve; V28-Heat exchange Outlet valve.
Detailed Description
The core of the invention is to provide a water electrolysis hydrogen production system and a heat management system thereof, which are used for solving the problems of low energy utilization rate and large energy loss in the water electrolysis hydrogen production process.
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1 to fig. 3, an embodiment of the present invention provides a thermal management system of a system for producing hydrogen by electrolyzing water, including a waste heat recycling pipeline, wherein the waste heat recycling pipeline is provided with a first heat exchange unit, a second heat exchange unit and a circulating power source; the first heat exchange unit is used for carrying out heat exchange and cooling on the water electrolysis hydrogen production system through a heat exchange medium; the second heat exchange unit is used for supplying heat energy to the target terminal through the heat exchange medium; the circulating power source is used for conveying the heat exchange medium flowing through the first heat exchange unit to the second heat exchange unit through the waste heat recovery circulating pipeline.
This heat management system, in the practical application in-process, the heat transfer medium circulation flow in the waste heat recovery circulating line under the effect of circulation power supply, the heat transfer medium that flows through first heat transfer unit can carry out the heat transfer cooling to electrolytic water hydrogen production system, thereby make heat transfer medium can absorb the heat energy that electrolytic water hydrogen production system produced, the heat transfer medium who absorbs the heat energy passes through waste heat recovery circulating line and carries to second heat transfer unit, supply heat energy to target terminal by second heat transfer unit, thereby can be to the heat energy make full use of that electrolytic water hydrogen production system produced, energy utilization is promoted, energy consumption loss has been reduced.
It should be noted that the process flow of the hydrogen production process is shown in fig. 1-3, and the specific process flow is as follows: hydrogen and alkali liquor generated by electrolysis of the electrolytic cell 1 enter the hydrogen separation scrubber 2 to be separated to obtain crude hydrogen and alkali liquor, oxygen and alkali liquor generated enter the oxygen separation scrubber 3 to obtain crude oxygen and alkali liquor, the alkali liquor obtained by separation from the hydrogen separation scrubber 2 and the oxygen separation scrubber 3 is converged into the alkali liquor heat exchanger 6, and is cooled to a certain temperature and then is boosted by the alkali liquor circulating pump 7 to return to the inlet of the electrolytic cell 1. Crude hydrogen flows out from the top of the hydrogen separation washer 2 and enters a deoxidation reactor 8 for deoxidation reaction, the deoxidized gas is cooled in two stages, wherein a deoxidation first-stage cooling heat exchanger 9 can be cooled by cooling water or heat conducting oil, a second-stage cooling heat exchanger further cools the gas by refrigerating fluid, the cooled gas is subjected to separation and dehydration by a gas-water separator 11 and then enters drying filled with an adsorbent, and 3 drying towers are respectively subjected to cycle switching operation of drying, regeneration and secondary adsorption. After the gas enters the drying tower 12 in the drying process for adsorption drying, one part of the gas is taken as a product, the other part of the gas is shunted to the drying tower 13 for regeneration, the gas flowing out of the drying tower 13 enters the gas-water separator 20 for moisture removal after passing through the primary cooling of the regeneration primary cooling heat exchanger 18 and the secondary cooling of the secondary cooling heat exchanger 19, and then enters the drying tower 14 for secondary adsorption for further moisture removal, so that the product gas is obtained.
In some specific embodiments, the first heat exchange unit may specifically include a lye heat exchanger 6 for cooling the lye separated from the water electrolysis hydrogen production system. Specifically, alkali liquor obtained by separation in the hydrogen separation scrubber 2 and the oxygen separation scrubber 3 is converged into the alkali liquor heat exchanger 6, heat exchange media in the waste heat recovery circulation pipeline can absorb heat energy of the alkali liquor after passing through the alkali liquor heat exchanger 6, and then the heat exchange media are conveyed to the second heat exchange unit for utilization through the waste heat recovery circulation pipeline.
In a further embodiment, referring to fig. 3, the second heat exchange unit may specifically include a first heat exchange device, a heat grade conversion device, and a second heat exchange device, which are connected in series in sequence, where the heat grade conversion device is configured to convert a heat exchange medium output by the first heat exchange device from low-grade heat to usable high-grade heat. Through designing into above-mentioned structural style with second heat exchange unit, can make heat recovery utilization rate higher. It should be noted that the low-grade heat and the high-grade heat are relative terms.
In some more specific embodiments, the heat grade conversion device may include a heat storage tank 24 and a heat pump unit 25, where the heat storage tank 24 is configured to collect a heat exchange medium output by the first heat exchange device, the heat pump unit 25 is configured to convert a low-grade heat of the heat exchange medium in the heat storage tank 24 into a usable high-grade heat, and a circulation power source (corresponding to the cooling water circulation pump 27 in fig. 3) may be disposed on a connection pipeline between the heat storage tank 24 and the second heat exchange device. Through the structural style of heat pump set 25 cooperation heat storage tank 24 for heat transfer medium can concentrate and carry out heat grade conversion and storage, can guarantee the continuation and the stability of high-grade heat supply. It should be understood that, the manner of implementing heat grade conversion by using the heat storage tank and the heat pump unit is only a preferred example of the embodiment of the present invention, and in practical application, other structural forms of heat grade conversion may also be used, which is not limited herein in more detail.
It should be noted that, one heat pump may be arranged in the heat pump unit 25 as shown in fig. 1, two heat pumps may be arranged in the heat pump unit 25 as shown in fig. 2, or more than two heat pumps may be arranged, and the number of the heat pump units 25 may be configured according to actual requirements.
In addition, when the heat pump unit 25 adopts two or more heat pumps, the heat pumps can be connected in series, in parallel or in series and parallel, as long as the temperature of the liquid in the heat storage tank can quickly reach a certain use requirement. In addition, one of the heat pumps connected in parallel can be used as a standby pump, so that abnormal operation of the waste heat utilization system caused by abnormal conditions of other heat pumps is avoided. In the heat pump control process, a plurality of heat pumps can be controlled to operate simultaneously, one or more heat pumps can be controlled to be used as standby pumps, and the temperature of a heat source in the heat storage tank 24 is ensured to be maintained in a reasonable temperature range by adjusting the power of the heat pumps.
In some more specific embodiments, the first heat exchange device may specifically include a heat exchanger 29 and a heat exchanger 30 connected in series. The heating heat exchanger 29 may be used for domestic heating or industrial heating (such as heating in a factory or a container), and the heat tracing heat exchanger 30 may be used for heat tracing and heat preservation of equipment needing heat preservation, such as a pipeline or a water tank. Since the heating heat exchanger 29 is closer to the first heat exchange unit (i.e., the lye heat exchanger), the basic heating requirement can be ensured, and the heat exchange medium output by the heating heat exchanger 29 can basically meet the heat preservation and heat tracing functions. It should be understood that the heating heat exchanger 29 and the heat trace heat exchanger 30 are only examples of the first heat exchanging device according to the embodiment of the present invention, and other heat removing devices may be used in practical applications, which are not limited in more detail herein.
In a further embodiment, the inlet and outlet of the heating heat exchanger 29 may be communicated through a first bypass line, and the first bypass line is provided with a first bypass valve V20. By designing the first bypass line and the first bypass valve V20, whether the heat exchange medium passes through the heat exchanger 29 can be selected, and the heat exchanger can be turned on and off as required.
In a further embodiment, in order to facilitate the disassembly and assembly maintenance of the heating heat exchanger 29, a heating inlet valve V21 may be further disposed on the input pipeline of the heating heat exchanger 29, a heating outlet valve V22 may be disposed on the output pipeline of the heating heat exchanger 29, and two ends of the first bypass pipeline are respectively connected to the upstream of the heating inlet valve V21 and the downstream of the heating outlet valve V22. The heating heat exchanger 29 is disassembled and maintained under the condition that the whole heat management system can be ensured to continuously operate by arranging the heating inlet valve V21 and the heating outlet valve V22.
Similarly, the inlet and the outlet of the heat tracing heat exchanger 30 can be communicated through a second bypass pipeline, and a second bypass valve V23 is disposed on the second bypass pipeline. Through the second bypass line and the second bypass valve V23, whether the heat exchange medium passes through the heat tracing heat exchanger 30 or not can be selected, and the heat tracing heat exchanger can be opened and closed according to the requirement.
In a further embodiment, the input pipeline of the heat tracing heat exchanger 30 may be provided with a heat tracing inlet valve V24, the output pipeline of the heat tracing heat exchanger 30 may be provided with a heat tracing outlet valve V25, and two ends of the second bypass pipeline are respectively connected to the upstream of the heat tracing inlet valve V24 and the downstream of the heat tracing outlet valve V25. The heat tracing heat exchanger 30 can be disassembled and maintained under the condition that the whole heat management system can be ensured to continuously operate by arranging the heat tracing inlet valve V24 and the heat tracing outlet valve V25.
In some specific embodiments, the inlet and the outlet of the second heat exchange device can be communicated through a third bypass pipeline, and a third bypass valve V26 is disposed on the third bypass pipeline. The heat exchange medium can be controlled to selectively flow through the second heat exchange device through the third bypass pipeline and the third bypass valve V26, for example, when the second heat exchange device does not need to operate and the heat quality conversion device is not opened, the third bypass valve V26 is opened at this time, and the heat exchange medium directly flows away through the third bypass pipeline.
In a further embodiment, in order to facilitate the disassembly and assembly maintenance of the second heat exchange device, a heat exchange inlet valve V27 may be disposed on an input pipeline of the second heat exchange device, a heat exchange outlet valve V28 may be disposed on an output pipeline of the second heat exchange device, and two ends of the third bypass pipeline are respectively connected to an upstream of the heat exchange inlet valve V27 and a downstream of the heat exchange outlet valve V28. The second heat exchange device is disassembled and maintained under the condition that the heat exchange inlet valve V27 and the heat exchange outlet valve V28 are arranged to ensure the continuous operation of the whole heat management system
In some specific embodiments, referring to fig. 1 and fig. 2, the first heat exchange unit may further include, in addition to the lye heat exchanger 6, a cooling heat exchanger arranged in parallel with the lye heat exchanger 6, and the cooling heat exchanger may specifically include at least one of a first cooling heat exchanger and a second cooling heat exchanger, where the first cooling heat exchanger is a deoxygenation primary cooling heat exchanger 9 for cooling the gas after crude hydrogen deoxygenation; the second cooling heat exchanger comprises a number of regenerative primary cooling heat exchangers 15,18,23 for cooling the drying tower regeneration gas.
In a further embodiment, the first cooling heat exchanger and the second cooling heat exchanger may be specifically arranged in series, or may be arranged in parallel. In the actual application process, the configuration can be selected according to the actual requirement.
In some specific embodiments, when the first cooling heat exchanger and the second cooling heat exchanger are arranged in parallel, a first input control valve V1 is disposed on the heat exchange medium input pipeline of the alkali liquor heat exchanger 6, a second input control valve is disposed on the heat exchange medium input pipeline of the cooling heat exchanger, and corresponding heat exchange control valves are disposed on the heat exchange medium input pipelines of the respective regeneration primary cooling heat exchangers, and the heat exchange control valves are opened only in the regeneration step of the drying tower. Referring to fig. 1 and 2, the second cooling heat exchanger specifically includes a regenerative primary cooling heat exchanger 15 for cooling the regeneration gas of the drying tower 12, a regenerative primary cooling heat exchanger 18 for cooling the regeneration gas of the drying tower 13, and a regenerative primary cooling heat exchanger 23 for cooling the regeneration gas of the drying tower 14), and the heat exchange control valve specifically may include a first cooling control valve V2 for controlling the regenerative primary cooling heat exchanger 15; a second cooling control valve V3 for controlling the regenerative primary cooling heat exchanger 18; and a third cooling control valve V4 for controlling the regenerative primary cooling heat exchanger 23. Generally, the drying towers are all operated by periodically switching drying-regeneration-sub-adsorption, but the heat generated in the regeneration process is relatively high, so that in practical application, the first cooling control valve V2, the second cooling control valve V3 and the third cooling control valve V4 are all opened only in the regeneration process of the respective drying towers.
In some specific embodiments, the second heat exchange unit may specifically include a low-grade heat recovery unit connected in series to the waste heat recovery circulation line. The low-grade heat recovery unit can at least carry out heat preservation and heat tracing on a pipeline to be subjected to heat preservation and/or a water tank and the like.
In a further embodiment, an inlet and an outlet of the low-grade heat recovery unit can be communicated through a fourth bypass pipeline, a fourth bypass valve V10 is arranged on the fourth bypass pipeline, and the heat exchange medium can be controlled to selectively flow through the low-grade heat recovery unit by designing the fourth bypass pipeline and the fourth bypass valve V10, so that the control is more flexible; in addition, a low-grade heat inlet valve V8 is arranged on an input pipeline of the low-grade heat recovery unit, a low-grade heat outlet valve V7 is arranged on an output pipeline of the low-grade heat recovery unit, and two ends of a fourth bypass pipeline are respectively connected to the upstream of the low-grade heat inlet valve V8 and the downstream of the low-grade heat outlet valve V7. By designing the low-grade heat inlet valve V8 and the low-grade heat outlet valve V7, the low-grade heat recovery unit is more convenient to disassemble, assemble and maintain.
In a further embodiment, the second heat exchange unit may further include a high-grade heat recovery unit disposed on the waste heat recovery circulation pipeline and arranged in parallel with the low-grade heat recovery unit. The high-grade heat recovery unit specifically comprises a heat grade conversion device, a first circulating pump body and a high-grade heat exchanger which are connected in series in sequence; the heat grade conversion device is used for converting the heat exchange medium output by the first heat exchange unit from low-grade heat into usable high-grade heat; the first circulation pump body (corresponding to the cooling water circulation pump 27 in fig. 1 and 2) is used for conveying the heat exchange medium with high-grade heat to the high-grade heat exchanger. Through designing into above-mentioned structural style with second heat exchange unit, can make heat recovery utilization rate higher. It should be noted that the low-grade heat and the high-grade heat are relative terms.
Specifically, the heat grade conversion device may include a heat storage tank 24 and a heat pump unit 25, where the heat storage tank 24 is configured to collect a heat exchange medium output by the first heat exchange unit, and the heat pump unit 25 is configured to convert the heat exchange medium in the heat storage tank 24 from low-grade heat to usable high-grade heat. Through the structural style of heat pump set 25 cooperation heat storage tank 24 for heat transfer medium can concentrate and carry out heat grade conversion and storage, can guarantee the continuation and the stability of high-grade heat supply. It should be understood that, the above-mentioned heat storage tank and heat pump unit are only preferred examples of the embodiment of the present invention, and in the practical application process, other structural forms of heat grade conversion may also be adopted, which is not limited herein.
In a further embodiment, the high-grade heat recovery unit may further include a first control valve V12 and a fifth bypass pipeline, the heat storage tank 24 is further provided with a return port, the output pipeline of the high-grade heat exchanger is communicated with the return port through the fifth bypass pipeline, and the fifth bypass pipeline is provided with a fifth bypass valve V11; the first control valve V12 is disposed in the output pipeline of the high-grade heat exchanger and is located downstream of the connection node of the fifth bypass pipeline and the output pipeline of the high-grade heat exchanger. Through the fifth bypass line, the fifth bypass valve V11, and the first control valve V12, the heat storage tank 24 can select whether to perform self-circulation according to the demand. For example, when the temperature inside the heat storage tank 24 is higher than the return water temperature, the first control valve V12 may be selectively closed, and the fifth bypass valve V11 may be opened, so as to implement the medium from the outlet of the high-grade heat exchanger (such as a heating device) to return to the heat storage tank 24 again; when the temperature inside the heat storage tank 24 is not higher than the return water temperature, the medium at the outlet of the high-grade heat exchanger can be switched back to the water cooling tower 4, so that the return water with higher temperature enters the heat storage tank to keep higher temperature inside the tank, and the heating requirements are met.
In a further embodiment, the high-grade heat exchanger may specifically include at least one of a heating device and a heating device. For example, when the high-grade heat exchanger includes a heating device and a heating device, the heating device and the heating device may be arranged in series or in parallel according to actual requirements.
In a further embodiment, the inlet and the outlet of the heating device may be communicated through a sixth bypass pipeline, and a sixth bypass valve V18 is disposed on the sixth bypass pipeline. Whether the heat exchange medium passes through the heating equipment or not can be selected through the sixth bypass pipeline and the sixth bypass valve V18, and the heat exchange medium can be opened and closed according to requirements. In addition, a heating input valve V14 may be disposed on an inlet connection pipe of the heating equipment, a heating output valve V13 may be disposed on an outlet connection pipe of the heating equipment, and both ends of the sixth bypass pipe are connected to an upstream of the heating input valve V14 and a downstream of the heating output valve V13, respectively. The heating equipment is disassembled and maintained under the condition that the whole thermal management system can be ensured to continuously operate by arranging the heating input valve V14 and the heating output valve V13.
When the high-grade heat exchanger includes a heating device, the number of the heating devices may be 1, or a plurality of heating devices may be arranged in parallel. The heating device arranged in parallel can be applied to various heating scenes, such as heating of the alkali liquor heat exchanger and other devices to be heated, and can be matched according to actual requirements in the actual application process.
In a further embodiment, in order to control whether the heating device needs to operate, the inlet and the outlet of the heating device may be communicated through a seventh bypass pipeline, and the seventh bypass pipeline is provided with a seventh bypass valve V17.
In a further embodiment, in order to facilitate the disassembly and assembly maintenance of the heating device, a heating inlet valve V16 may be disposed on the inlet connection pipeline of the heating device, and a heating inlet valve V15 may be disposed on the outlet connection pipeline of the heating device.
In some more specific embodiments, the output pipeline of the first heat exchange unit may be provided with a control valve group (refer to the first open-close control valve V5, the second open-close control valve V6 and the third open-close control valve V9 in fig. 1 and 2), and the control valve group has a first working state, a second working state and a third working state; when the control valve group is in a first working state (namely the first opening and closing control valve V5 is opened, and the second opening and closing control valve V6 and the third opening and closing control valve V9 are both closed), the output pipeline of the first heat exchange unit is independently conducted with the low-grade heat recovery unit; when the control valve group is in a second working state (namely the second open-close control valve V6 is opened, and the first open-close control valve V5 and the third open-close control valve V9 are both closed), the output pipeline of the first heat exchange unit is independently conducted with the high-grade heat recovery unit; when the control valve group is in the third working state (that is, the third open-close control valve V9 is closed, and the first open-close control valve V5 and the second open-close control valve V6 are both opened), the output pipeline of the first heat exchange unit is conducted with both the low-grade heat recovery unit and the high-grade heat recovery unit. The control valve group is used for controlling so that the control of the low-grade heat recovery unit and the high-grade heat recovery unit is more flexible. It should be understood that the valve block structure of the first open/close control valve V5, the second open/close control valve V6, and the third open/close control valve V9 is only an example of the control valve block according to the embodiment of the present invention, and in the practical application, other switchable valve block structures may be designed, which is not limited herein.
It should be noted that the thermal management system may be generally configured with a controller 28, and the controller 28 performs centralized control on the various valve bodies mentioned above, so as to facilitate control.
It should be noted that, a cooling tower 4 may also be generally disposed on the above-mentioned waste heat recycling pipeline, and the cooling tower 4 is located at the upstream of the first heat exchanging unit, and a circulation power source (corresponding to the cooling water circulation pump 5 in fig. 1 and fig. 2) is disposed on the connecting pipeline between the cooling tower 4 and the first heat exchanging unit.
In addition, the invention also provides a water electrolysis hydrogen production system, which comprises a heat management system, wherein the heat management system is the heat management system of the water electrolysis hydrogen production system described in any scheme. Because the thermal management system has the technical effects, the system for producing hydrogen by electrolyzing water with the thermal management system also has the corresponding technical effects, which are not described herein again.
By adopting the technical scheme described in the invention, the low-grade energy is converted into the high-grade energy, and then the high-grade energy is comprehensively utilized through energy management, so that the heating and heat preservation of alkali liquor in a hydrogen production system, the heat preservation of pipelines and water tanks and the heat preservation in plant areas and container systems can be realized, and the comprehensive utilization efficiency of waste heat is greatly improved. In a comprehensive way, the heat preservation function of the hydrogen production system is realized, the hydrogen production system is ensured to rapidly realize high-power operation at a higher temperature, and the hydrogen production efficiency is improved; in addition, when the climate is cold, the heat preservation of the internal and external pipelines and the water tank of the hydrogen production device can be realized, the abnormal operation of the hydrogen production device caused by the freezing of instrument equipment such as pipeline valves and the like is prevented, and the safety risk is reduced.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should be understood that the use of "system," "device," "unit," and/or "module" herein is merely one way to distinguish between different components, elements, components, parts, or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
If used in this application, the flowcharts are intended to illustrate operations performed by the system according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to or removed from these processes.
It should also be noted that in this document, terms such as "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in an article or device comprising the same element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (25)
1. The heat management system of the water electrolysis hydrogen production system is characterized by comprising a waste heat recovery circulating pipeline, wherein a first heat exchange unit, a second heat exchange unit and a circulating power source are arranged on the waste heat recovery circulating pipeline; the first heat exchange unit is used for carrying out heat exchange and cooling on the water electrolysis hydrogen production system through a heat exchange medium; the second heat exchange unit is used for supplying heat energy to the target terminal through the heat exchange medium; the circulating power source is used for conveying the heat exchange medium flowing through the first heat exchange unit to the second heat exchange unit through the waste heat recovery circulating pipeline.
2. The thermal management system for hydrogen production from water electrolysis system according to claim 1, wherein the first heat exchange unit comprises a lye heat exchanger (6) for cooling the lye separated by the hydrogen production from water electrolysis system.
3. The thermal management system of the water electrolysis hydrogen production system according to claim 2, wherein the second heat exchange unit comprises a first heat exchange device, a heat grade conversion device and a second heat exchange device connected in series in sequence, wherein the heat grade conversion device is used for converting the heat exchange medium output by the first heat exchange device from low-grade heat to usable high-grade heat.
4. The thermal management system of the water electrolysis hydrogen production system according to claim 3, wherein the heat grade conversion device comprises a heat storage tank (24) and a heat pump unit (25), the heat storage tank (24) is used for collecting the heat exchange medium output by the first heat exchange device, the heat pump unit (25) is used for converting the heat exchange medium in the heat storage tank (24) from low-grade heat to usable high-grade heat, and the circulation power source is disposed on a connection pipeline between the heat storage tank (24) and the second heat exchange device.
5. The thermal management system of the water electrolysis hydrogen production system according to claim 3, wherein the first heat exchange device comprises a heating heat exchanger (29) and a heat tracing heat exchanger (30) which are connected in series in sequence.
6. The heat management system of the system for producing hydrogen by electrolyzing water as claimed in claim 5, wherein the inlet and outlet of the heating heat exchanger (29) are communicated by a first bypass pipe, and a first bypass valve (V20) is arranged on the first bypass pipe.
7. The thermal management system of the water electrolysis hydrogen production system according to claim 5, wherein the inlet and the outlet of the heat tracing heat exchanger (30) are communicated through a second bypass pipeline, and a second bypass valve (V23) is arranged on the second bypass pipeline.
8. The thermal management system for hydrogen production system by electrolyzing water according to claim 3, wherein the inlet and outlet of the second heat exchanging device are connected by a third bypass pipeline, and a third bypass valve (V26) is arranged on the third bypass pipeline.
9. The thermal management system of the water electrolysis hydrogen production system according to claim 2, wherein the first heat exchange unit further comprises a cooling heat exchanger arranged in parallel with the lye heat exchanger (6), the cooling heat exchanger comprises at least one of a first cooling heat exchanger and a second cooling heat exchanger, wherein the first cooling heat exchanger is a deoxygenation primary cooling heat exchanger for cooling the crude hydrogen deoxygenated gas; the second cooling heat exchanger comprises a plurality of regeneration primary cooling heat exchangers used for cooling the regeneration gas of the drying tower.
10. The system for thermally managing water electrolysis hydrogen production system according to claim 9, wherein the first cooling heat exchanger and the second cooling heat exchanger are arranged in series or in parallel.
11. The thermal management system of the water electrolysis hydrogen production system according to claim 10, wherein when the first cooling heat exchanger and the second cooling heat exchanger are arranged in parallel, a first input control valve (V1) is arranged on the heat exchange medium input pipeline of the alkali liquor heat exchanger (6), a second input control valve is arranged on the heat exchange medium input pipeline of the cooling heat exchanger, and a corresponding heat exchange control valve is arranged on the heat exchange medium input pipeline of each regeneration primary cooling heat exchanger, and the heat exchange control valves are opened only when the drying tower performs a regeneration link.
12. The system for managing heat of a water electrolysis hydrogen production system according to claim 9, wherein the second heat exchange unit comprises a low-grade heat recovery unit connected in series with the waste heat recovery circulation pipeline.
13. The thermal management system for a system for producing hydrogen from electrolyzed water of claim 12, wherein the low-grade heat recovery unit is at least used for heat tracing of heat preservation of a pipeline and/or a water tank to be preserved.
14. The thermal management system of the system for producing hydrogen by electrolyzing water as claimed in claim 12, wherein the inlet and outlet of the low-grade heat recovery unit are connected by a fourth bypass pipeline, and a fourth bypass valve (V10) is arranged on the fourth bypass pipeline.
15. The system for thermally managing water electrolysis hydrogen production system according to claim 12, wherein the second heat exchange unit further comprises a high-grade heat recovery unit disposed on the waste heat recovery circulation pipeline and arranged in parallel with the low-grade heat recovery unit.
16. The thermal management system of a system for producing hydrogen from electrolyzed water of claim 15, wherein the high-grade heat recovery unit comprises a heat grade conversion device, a first circulation pump body and a high-grade heat exchanger connected in series in sequence;
the heat grade conversion device is used for converting the heat exchange medium output by the first heat exchange unit from low-grade heat into usable high-grade heat;
the first circulation pump body is used for conveying a heat exchange medium with high-grade heat to the high-grade heat exchanger.
17. The thermal management system for hydrogen production from electrolyzed water as defined in claim 16, wherein the high-grade heat recovery unit further comprises a fifth bypass pipeline, the heat quality conversion device is further provided with a return port, and the output pipeline of the high-grade heat exchanger is communicated with the return port through the fifth bypass pipeline.
18. The system for thermally managing water electrolysis hydrogen production system according to claim 15, wherein the high-grade heat exchanger comprises at least one of a heating device and a heating device.
19. The thermal management system for a water electrolysis hydrogen production system according to claim 18, wherein the high-grade heat exchanger comprises a heating device and a heating device, and the heating device are sequentially arranged in series or in parallel.
20. The thermal management system for hydrogen production system by electrolyzing water according to claim 19, wherein the inlet and outlet of the heating equipment are connected by a sixth bypass pipeline, and a sixth bypass valve (V18) is disposed on the sixth bypass pipeline.
21. The system for thermally managing water electrolysis hydrogen production system according to claim 19, wherein the number of the heating devices is plural and arranged in parallel.
22. The thermal management system for hydrogen production system by electrolyzing water according to claim 21, wherein the inlet and outlet of the heating device are connected by a seventh bypass pipeline, and a seventh bypass valve (V17) is disposed on the seventh bypass pipeline.
23. The thermal management system for hydrogen production from water electrolysis system according to claim 15, wherein a control valve set is disposed on the output pipeline of the first heat exchange unit, and the control valve set has a first operating state, a second operating state and a third operating state; when the control valve group is in a first working state, the output pipeline of the first heat exchange unit is independently conducted with the low-grade heat recovery unit; when the control valve group is in a second working state, the output pipeline of the first heat exchange unit is independently conducted with the high-grade heat recovery unit; when the control valve group is in a third working state, the output pipeline of the first heat exchange unit is communicated with the low-grade heat recovery unit and the high-grade heat recovery unit.
24. The heat management system for the water electrolysis hydrogen production system according to any one of claims 9 to 23, wherein a water cooling tower (4) is further disposed on the waste heat recovery circulation pipeline, the water cooling tower (4) is located upstream of the first heat exchange unit, and the circulation power source is disposed on a connection pipeline between the water cooling tower (4) and the first heat exchange unit.
25. A water electrolysis hydrogen production system comprising a thermal management system, wherein the thermal management system is the thermal management system of the water electrolysis hydrogen production system according to any one of claims 1 to 24.
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