CN117888143A - Energy efficiency control system and energy efficiency control method for coupling electrolysis hydrogen production - Google Patents
Energy efficiency control system and energy efficiency control method for coupling electrolysis hydrogen production Download PDFInfo
- Publication number
- CN117888143A CN117888143A CN202410050307.6A CN202410050307A CN117888143A CN 117888143 A CN117888143 A CN 117888143A CN 202410050307 A CN202410050307 A CN 202410050307A CN 117888143 A CN117888143 A CN 117888143A
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- hydrogen production
- electrolytic tank
- electrolyte
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 54
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000001257 hydrogen Substances 0.000 title claims abstract description 52
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 52
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- 239000003792 electrolyte Substances 0.000 claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000001816 cooling Methods 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 abstract description 11
- 230000004044 response Effects 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- C25B9/70—Assemblies comprising two or more cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The embodiment of the invention provides a coupling electrolysis hydrogen production energy efficiency control system and an energy efficiency control method, wherein the coupling electrolysis hydrogen production energy efficiency control system is applied to a plurality of electrolysis hydrogen production devices, an electrolysis tank group is arranged in each electrolysis hydrogen production device, and the coupling electrolysis hydrogen production energy efficiency control system comprises: the electrolyte circulation system in the equipment and the external heat exchange system are in heat exchange through the heat exchanger groups. The pure water electrolysis water unit is coupled with the cooling circulating water system of the lattice type alkaline electrolysis water unit, so that the waste heat of the pure water electrolysis tank and the waste heat of the alkaline electrolysis tank are mutually utilized and mutually prepared, and the purposes of integral energy comprehensive utilization and quick response are realized.
Description
Technical Field
The invention belongs to the technical field of hydrogen production, and particularly relates to an energy efficiency control system and an energy efficiency control method for coupling electrolysis hydrogen production.
Background
The current industrialized hydrogen production method comprises a plurality of steps, including natural gas steam reforming hydrogen production, methanol reforming hydrogen production, water gas hydrogen production and water electrolysis hydrogen production, wherein raw water for water electrolysis hydrogen production is inexhaustible, reaction products after energy use are water, and meanwhile, the electric energy of electrolysis water can utilize wind energy, solar energy and nuclear energy, so that the water electrolysis hydrogen production has good social and economical properties.
The existing technology has the advantages, but mainly optimizes the connection mode of the electrolytic hydrogen production system, thereby achieving the purposes of reducing the running cost and risk of the hydrogen production system and enabling the differential pressure regulating valve to be more sensitive and accurate; or the energy consumption of the system is reduced by adding heat preservation measures, so that the alkaline electrolytic tank can be started quickly. At present, a hydrogen production system which is capable of realizing comprehensive utilization of energy, quick start-up corresponding, wide operation flexibility and low cost by carrying out combined optimization on a plurality of pure water electrolytic tanks and alkaline electrolytic tanks does not exist.
Disclosure of Invention
In view of the above problems in the prior art, an object of an embodiment of the present invention is to provide an energy efficiency control system and an energy efficiency control method for producing hydrogen by coupling electrolysis.
The technical scheme adopted by the embodiment of the invention is that the energy efficiency control system for the coupled electrolytic hydrogen production is applied to a plurality of electrolytic hydrogen production devices, an electrolytic tank group is arranged in each electrolytic hydrogen production device, and the energy efficiency control system comprises: the electrolyte circulation system in the equipment and the external heat exchange system are in heat exchange through the heat exchanger groups.
Further, the external heat exchange system comprises a heat exchange medium pipeline, the heat exchange medium pipeline is connected with a heat exchanger group of the electrolyte circulation system in the equipment to form a circulation pipeline, and a first circulation pump is further connected in series on the heat exchange medium pipeline.
Furthermore, the heat exchange medium pipeline is connected with a cooling device in parallel, the cooling device is connected with a first cooling valve in series, and the first cooling valve controls whether the medium in the heat exchange medium pipeline flows through the cooling device or not.
Further, a second cooling valve is arranged on a pipeline connected with the cooling device in parallel on the heat exchange medium pipeline, and the second cooling valve is matched with the first cooling valve to control the flow flowing to the cooling device.
Furthermore, an adjusting pipeline is arranged on the heat exchange medium pipeline, and the heat exchange medium pipeline is connected with a heat exchanger group of an electrolyte circulation system in the equipment through the adjusting pipeline; the regulating pipeline comprises a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is connected with the output end of the heat exchange medium pipeline and the input end of the heat exchanger group of the electrolyte circulating system in the equipment, the liquid outlet pipe is connected with the output end of the heat exchange medium pipeline and the output end of the heat exchanger group of the electrolyte circulating system in the equipment, and the liquid inlet pipe and/or the liquid outlet pipe are/is provided with a first valve.
Further, a communicating pipe is connected to a liquid outlet pipe connected to the heat exchanger group in the electrolyte circulation system in the equipment, the communicating pipe is connected to a liquid inlet pipe connected to the heat exchanger group in the electrolyte circulation system in other equipment, and a second valve is installed on the communicating pipe.
Further, the electrolyte circulation system in the equipment further comprises a separator, the electrolyte flows through the separator to separate out gas, the gas outlet end of the separator is connected with a gas pipe, and a plurality of regulating valves are connected in parallel on the gas pipe.
Further, the electrolytic tank group comprises a plurality of electrolytic tanks which are connected in parallel.
Further, the heat exchanger group comprises a plurality of heat exchangers which are connected in parallel.
An energy efficiency control method for the combined hydrogen production of a pure water electrolytic tank and an alkaline electrolytic tank comprises the following steps:
respectively constructing an in-equipment electrolyte circulation system by a pure water electrolytic tank and an alkaline electrolytic tank, wherein the in-equipment electrolyte circulation system also comprises a first circulation pump and a heat exchanger group, and the first circulation pump enables electrolyte in the pure water electrolytic tank/the alkaline electrolytic tank to flow through the heat exchanger group in the in-equipment electrolyte circulation system;
an external heat exchange system is constructed, the external heat exchange system comprises a heat exchange medium pipeline, the heat exchange medium pipeline is connected with a first circulating pump in series, and the electrolyte circulating system in the equipment is connected to the external heat exchange system through a heat exchanger group;
and controlling whether the electrolyte circulation system in each device exchanges heat with an external heat exchange system based on the operation state of the hydrogen production device.
Further, controlling whether the electrolyte circulation system in each device exchanges heat with an external heat exchange system based on the operation state of the hydrogen production device includes;
when the pure water electrolytic tank and the alkaline electrolytic tank start to work at the same time, heat exchanger groups in an electrolyte circulation system in equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in series to an external heat exchange system;
when the pure water electrolytic tank and the alkaline electrolytic tank work simultaneously and at least one electrolyte temperature in the pure water electrolytic tank and the alkaline electrolytic tank does not reach the upper limit value, the heat exchanger groups in the electrolyte circulation system in the equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in parallel to an external heat exchange system.
A cooling device is further arranged in the external heat exchange system;
the controlling whether the electrolyte circulation system in each device exchanges heat with the external heat exchange system based on the operation state of the hydrogen production device comprises;
when one of the pure water electrolytic tank and the alkaline electrolytic tank works or works simultaneously, and the temperature of the electrolyte in the electrolytic tank reaches the upper limit value in the working process, the heat exchanger groups in the electrolyte circulation system in the equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in parallel/in series to an external heat exchange system, and a heat exchange medium in the external heat exchange system flows through a cooling device.
Compared with the prior art, the pure water electrolysis water unit is coupled with the cooling circulating water system of the lattice type alkaline electrolysis water unit, so that the waste heat of the pure water electrolysis water tank and the waste heat of the alkaline electrolysis water tank are mutually utilized and mutually thermally prepared, and the purposes of integral comprehensive energy utilization and quick response are realized. Meanwhile, the heating and heat preservation of the electrolytic cells of the whole system by utilizing the waste heat of one or more electrolytic cells can be realized, so that the whole system is in a hot standby state, and the rapid response to the front-end new energy power fluctuation is realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
An overview of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all of the features of the technology disclosed.
Drawings
In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the inventive embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method.
Fig. 1 is a schematic diagram of an external heat exchange system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an electrolyte circulation system in an apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components thereof have been omitted.
Referring to fig. 1 to 2, an embodiment of the present invention provides a coupled electrolytic hydrogen production energy efficiency control system, which is applied to a plurality of electrolytic hydrogen production devices, wherein an electrolytic tank group 1 is arranged in the electrolytic hydrogen production device, and the system comprises: the electrolyte circulation system in the equipment and the external heat exchange system are connected with each other through the heat exchanger group 2. The cooling circulating water systems of a plurality of devices can be coupled, for example, the pure water electrolysis water unit and the cooling circulating water system of the lattice type alkaline electrolysis water unit can be coupled, so that the waste heat of the pure water electrolysis tank and the waste heat of the alkaline electrolysis tank can be mutually utilized and mutually thermally prepared, and the purposes of integral comprehensive energy utilization and quick response can be realized. Meanwhile, the heating and heat preservation of the electrolytic tank of the whole system by utilizing the waste heat of the electrolytic tank of one or more devices can be realized, so that the whole system is in a hot standby state, and the rapid response to the front-end new energy power fluctuation is realized.
The specific external heat exchange system comprises a heat exchange medium pipeline, wherein the heat exchange medium pipeline is connected with a heat exchanger group 2 of an electrolyte circulation system in the equipment to form a circulation pipeline, and a first circulation pump 3 is further connected in series on the heat exchange medium pipeline. The first circulation pump 3 pumps a medium flowing in the circulation line.
Considering the need of heat dissipation in the actual use process, a cooling device 4 is connected in parallel to the heat exchange medium pipeline, the cooling device 4 is connected in series with a first cooling valve 5, and the first cooling valve 5 controls whether the medium in the heat exchange medium pipeline flows through the cooling device 4 or not; the first cooling valve 5 can be opened and closed according to actual conditions to control whether the medium in the heat exchange medium pipeline flows through the cooling device 4.
And a second cooling valve 6 is arranged on a pipeline which is connected with the cooling device 4 in parallel on the heat exchange medium pipeline, and the second cooling valve 6 is matched with the first cooling valve 5 to control the flow flowing to the cooling device 4. When the medium in the heat exchange medium pipeline flows through the cooling device 4, the flow flowing through the cooling device 4 can be adjusted by controlling the second cooling valve 6, so that the heat dissipation efficiency is indirectly controlled.
An adjusting pipeline is arranged on a heat exchange medium pipeline which is connected with an external heat exchange system for the multi-equipment, and the heat exchange medium pipeline is connected with a heat exchanger group 2 of an electrolyte circulation system in the equipment through the adjusting pipeline; the regulating pipeline comprises a liquid inlet pipe 7 and a liquid outlet pipe 8, wherein the liquid inlet pipe 7 is connected with the output end of the heat exchange medium pipeline and the input end of the heat exchanger group 2 of the electrolyte circulating system in the equipment, the liquid outlet pipe 8 is connected with the output end of the heat exchange medium pipeline and the output end of the heat exchanger group 2 of the electrolyte circulating system in the equipment, and a first valve 9 is arranged on the liquid inlet pipe 7 and/or the liquid outlet pipe 8.
A communicating pipe 10 is connected to the liquid outlet pipe 8 connected to the heat exchanger group 2 in at least one electrolyte circulation system in the device, the communicating pipe 10 is connected to the liquid inlet pipe 7 connected to the heat exchanger group 2 in the electrolyte circulation system in other devices, and a second valve 11 is installed on the communicating pipe 10. When the equipment heat exchange devices to be connected are connected in series to an external heat exchange system, one end of a communicating pipe 10 is connected with a liquid outlet pipe 8 of a heat exchanger group 2 in an electrolyte circulation system in one equipment, and the other end of the communicating pipe 10 is connected with a liquid inlet pipe 7 of the heat exchanger group 2 in the electrolyte circulation system in one equipment, so that the equipment is connected in series to the external heat exchange system.
The electrolyte circulation system in the equipment is isolated from the heat conducting medium of the external heat exchange system and exchanges heat through the heat exchanger group 2, wherein the electrolyte circulation system in the equipment further comprises an electrolytic tank group 1 and a second circulating pump 12, the heat exchanger group 2, the electrolytic tank group 1 and the second circulating pump 12 are constructed as circulating pipelines, and the second circulating pump 12 pumps the electrolyte in the electrolytic tank group 1 to flow through the heat exchanger group 2 and enable the electrolyte to flow back into the electrolytic tank group 1.
The electrolyte circulation system in the equipment further comprises a separator 13, the electrolyte is separated from gas through the separator 13, the gas outlet end of the separator 13 is connected with a gas pipe, and a plurality of regulating valves 14 are connected in parallel on the gas pipe.
The electrolytic tank group 1 comprises a plurality of electrolytic tanks which are connected in parallel.
The heat exchanger group 2 comprises a plurality of heat exchangers which are connected in parallel.
When the equipment is mutually beneficial to waste heat for hot standby, heat generated by the running equipment is transferred to electrolyte circulation systems in other equipment through the heat exchanger group 2 by an external heat exchange system. The temperature of the belt running equipment is raised by the running equipment, and the heat standby of the electrolytic tank group of other equipment is realized.
When the cooling device 4 is required to be operated at full load, the first cooling valve 5 is opened in the external heat exchange system to start the cooling device 4 (a cooling tower can be adopted), the second valve 11 is gradually closed, and finally the full flow of the heat exchange medium in the external heat exchange system flows through the cooling device 4.
On the contrary, when the cooling device 4 needs to be closed, the first cooling valve 5 is gradually closed, the second valve 11 is gradually opened, and finally the heat exchange medium in the external heat exchange system stops flowing through the cooling device 4.
The embodiment of the invention also provides an energy efficiency control method for the combined hydrogen production of the pure water electrolytic tank and the alkaline electrolytic tank, which is characterized by comprising the following steps:
respectively constructing an in-equipment electrolyte circulation system by a pure water electrolytic tank and an alkaline electrolytic tank, wherein the in-equipment electrolyte circulation system also comprises a first circulation pump 3 and a heat exchanger group 2, and the first circulation pump 3 enables electrolyte in the pure water electrolytic tank/the alkaline electrolytic tank to flow through the heat exchanger group 2 in the in-equipment electrolyte circulation system;
an external heat exchange system is constructed, the external heat exchange system comprises a heat exchange medium pipeline, the heat exchange medium pipeline is connected with a first circulating pump 3 in series, and the electrolyte circulating system in the equipment is connected to the external heat exchange system through a heat exchanger group 2;
and controlling whether the electrolyte circulation system in each device exchanges heat with an external heat exchange system based on the operation state of the hydrogen production device.
The controlling whether the electrolyte circulation system in each device exchanges heat with the external heat exchange system based on the operation state of the hydrogen production device comprises;
when the pure water electrolytic tank and the alkaline electrolytic tank start to work at the same time, the heat exchanger groups 2 in the electrolyte circulation system in the equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in series to an external heat exchange system;
when the pure water electrolytic tank and the alkaline electrolytic tank work simultaneously and at least one electrolyte temperature in the pure water electrolytic tank and the alkaline electrolytic tank does not reach the upper limit value, the heat exchanger groups 2 in the electrolyte circulation system in the equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in parallel to an external heat exchange system.
A cooling device 4 is also arranged in the external heat exchange system;
the controlling whether the electrolyte circulation system in each device exchanges heat with the external heat exchange system based on the operation state of the hydrogen production device comprises;
when one of the pure water electrolytic tank and the alkaline electrolytic tank works or works simultaneously, and the temperature of the electrolyte in the electrolytic tank reaches the upper limit value in the working process, the heat exchanger groups 2 in the electrolyte circulation system in the equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in parallel/in series to an external heat exchange system, and a heat exchange medium in the external heat exchange system flows through the cooling device 4.
Taking the following examples as an example:
two pure water electrolytic cell groups of 100NM3/h are coupled with four alkaline electrolytic cell groups of 500NM3/h, namely an in-equipment electrolyte circulation system of the two pure water electrolytic cell groups and an in-equipment electrolyte circulation system of the four alkaline electrolytic cell groups are connected to an external heat exchange system.
Taking photovoltaic power generation of one day as an example, a pure water electrolysis cell group is started to work, and heat generated in the operation of the pure water electrolysis cell group is transferred to an electrolyte circulation system in other equipment through the heat exchanger group 2 by an external heat exchange system. The whole system is heated by using one pure water electrolyzer group, and the electrolyzer group of other equipment is heated.
The other devices can then be turned on step by step, gradually bringing the other devices into operation.
When two pure water electrolyzer sets of 100NM3/h run to meet the self temperature maintenance requirement, the electrolyte circulation system in the pure water electrolyzer sets is added to exchange heat with an external heat exchange system preferentially, waste heat is utilized by the electrolyte circulation system in the equipment, the alkaline electrolyzer sets are continuously opened gradually along with the increase of the power generation, and the regulating valves 14 are opened one by one according to the increase of the gas production while the electrolyzer sets are opened.
When the heat of each electrolytic tank group is larger than the heat dissipation and the heat preservation and heat standby are not needed, the first cooling valve 5 is opened in the external heat exchange system to start the cooling device 4 (a cooling tower can be adopted), the second valve 11 is gradually closed, and finally the heat exchange medium in the external heat exchange system flows through the cooling device 4 at full flow rate. When the heat of an electrolytic tank group is smaller than the heat dissipation, the first cooling valve 5 is gradually closed, the second valve 11 is gradually opened, and finally the heat exchange medium in the external heat exchange system stops flowing through the cooling device 4.
With the gradual reduction of the photovoltaic power generation power, the electrolyzer sets are stopped one by one, the regulating valves 14 are closed one by one according to the reduction of the gas production while the electrolyzer sets are closed, and the running electrolyzer sets are utilized to supply heat to the rest electrolyzer sets to ensure hot standby.
The whole system adopts the mutual utilization of waste heat among devices for hot standby.
The above description is intended to be illustrative and not limiting, and variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present disclosure. Also, the above examples (or one or more aspects thereof) may be used in combination with each other, and it is contemplated that the embodiments may be combined with each other in various combinations or permutations.
Claims (13)
1. The energy efficiency control system for the coupled electrolysis hydrogen production is applied to a plurality of electrolysis hydrogen production devices, and an electrolysis tank group (1) is arranged in each electrolysis hydrogen production device, and is characterized by comprising the following components: the electrolyte circulating system and the external heat exchange system in the equipment are arranged, the heat exchanger group (2) is arranged on the electrolyte circulating system in the equipment, the heat exchanger group (2) is connected to the external heat exchange system, and the electrolyte circulating system and the external heat exchange system in the equipment exchange heat through the heat exchanger group (2).
2. The coupled electrolysis hydrogen production energy efficiency control system according to claim 1, wherein the external heat exchange system comprises a heat exchange medium pipeline, the heat exchange medium pipeline is connected with a heat exchanger group (2) of an electrolyte circulation system in the device to form a circulation pipeline, and a first circulation pump (3) is further connected in series on the heat exchange medium pipeline.
3. The energy efficiency control system for coupling electrolysis hydrogen production according to claim 2, wherein the heat exchange medium pipeline is connected with a cooling device (4) in parallel, the cooling device (4) is connected with a first cooling valve (5) in series, and the first cooling valve (5) controls whether a medium in the heat exchange medium pipeline flows through the cooling device (4).
4. A coupled electrolysis hydrogen production energy efficiency control system according to claim 3, wherein a second cooling valve (6) is arranged on a pipeline connected with the cooling device (4) in parallel on the heat exchange medium pipeline, and the second cooling valve (6) is matched with the first cooling valve (5) to control the flow rate flowing to the cooling device (4).
5. The energy efficiency control system for coupling electrolysis hydrogen production according to claim 2, wherein an adjusting pipeline is arranged on the heat exchange medium pipeline, and the heat exchange medium pipeline is connected with a heat exchanger group (2) of an electrolyte circulation system in the equipment through the adjusting pipeline; the regulating pipeline comprises a liquid inlet pipe (7) and a liquid outlet pipe (8), wherein the liquid inlet pipe (7) is connected with the output end of a heat exchange medium pipeline and the input end of a heat exchanger group (2) of an electrolyte circulating system in the equipment, the liquid outlet pipe (8) is connected with the output end of the heat exchange medium pipeline and the output end of the heat exchanger group (2) of the electrolyte circulating system in the equipment, and a first valve (9) is arranged on the liquid inlet pipe (7) and/or the liquid outlet pipe (8).
6. The coupled electrolysis hydrogen production energy efficiency control system according to claim 5, wherein at least one liquid outlet pipe (8) connected with the heat exchanger group (2) in the electrolyte circulation system in the equipment is connected with a communicating pipe (10), the communicating pipe (10) is connected with liquid inlet pipes (7) connected with the heat exchanger group (2) in the electrolyte circulation system in other equipment, and the communicating pipe (10) is provided with a second valve (11).
7. A coupled electrolysis hydrogen production energy efficiency control system according to claim 1 wherein the in-plant electrolyte circulation system further comprises an electrolysis cell bank (1) and a second circulation pump (12), the heat exchanger bank (2), electrolysis cell bank (1) and second circulation pump (12) being configured as circulation lines, the second circulation pump (12) drawing electrolyte in the electrolysis cell bank (1) through the heat exchanger bank (2) and back into the electrolysis cell bank (1).
8. The energy efficiency control system for coupling electrolysis hydrogen production according to claim 7, wherein the electrolyte circulation system in the device further comprises a separator (13), the electrolyte flows through the separator (13) to separate gas, the gas outlet end of the separator (13) is connected with a gas pipe, and a plurality of regulating valves (14) are connected in parallel on the gas pipe.
9. A coupled electrolysis hydrogen production energy efficiency control system according to claim 7 or 8, wherein the cell stack (1) comprises a plurality of cells connected in parallel.
10. A coupled electrolysis hydrogen production energy efficiency control system according to claim 1 wherein the heat exchanger bank (2) comprises a plurality of heat exchangers connected in parallel therebetween.
11. An energy efficiency control method for the combined hydrogen production of a pure water electrolytic tank and an alkaline electrolytic tank is characterized by comprising the following steps:
respectively constructing an in-equipment electrolyte circulation system by a pure water electrolytic tank and an alkaline electrolytic tank, wherein the in-equipment electrolyte circulation system also comprises a first circulation pump (3) and a heat exchanger group (2), and the first circulation pump (3) enables electrolyte in the pure water electrolytic tank/the alkaline electrolytic tank to flow through the heat exchanger group (2) in the in-equipment electrolyte circulation system;
an external heat exchange system is constructed, the external heat exchange system comprises a heat exchange medium pipeline, the heat exchange medium pipeline is connected with a first circulating pump (3) in series, and the electrolyte circulating system in the equipment is connected to the external heat exchange system through a heat exchanger group (2);
and controlling whether the electrolyte circulation system in each device exchanges heat with an external heat exchange system based on the operation state of the hydrogen production device.
12. The energy efficiency control method for combined hydrogen production in a pure water electrolyzer and an alkaline electrolyzer according to claim 11, characterized in that the controlling whether the electrolyte circulation system in each apparatus exchanges heat with an external heat exchange system based on the operation state of the hydrogen production apparatus comprises;
when the pure water electrolytic tank and the alkaline electrolytic tank start to work at the same time, heat exchanger groups (2) in an electrolyte circulation system in equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in series to an external heat exchange system;
when the pure water electrolytic tank and the alkaline electrolytic tank work simultaneously and at least one electrolyte temperature in the pure water electrolytic tank and the alkaline electrolytic tank does not reach the upper limit value, the heat exchanger groups (2) in the electrolyte circulation system in the equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in parallel to an external heat exchange system.
13. The energy efficiency control method for the combined hydrogen production of a pure water electrolyzer and an alkaline electrolyzer according to claim 11, characterized in that a cooling device (4) is also provided in the external heat exchange system;
the controlling whether the electrolyte circulation system in each device exchanges heat with the external heat exchange system based on the operation state of the hydrogen production device comprises;
when one of the pure water electrolytic tank and the alkaline electrolytic tank works or works simultaneously, and the temperature of the electrolyte in the electrolytic tank reaches the upper limit value in the working process, the heat exchanger groups (2) in the electrolyte circulation system in the equipment where the pure water electrolytic tank and the alkaline electrolytic tank are positioned are connected in parallel/in series to an external heat exchange system, and a heat exchange medium in the external heat exchange system flows through the cooling device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410050307.6A CN117888143A (en) | 2024-01-12 | 2024-01-12 | Energy efficiency control system and energy efficiency control method for coupling electrolysis hydrogen production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410050307.6A CN117888143A (en) | 2024-01-12 | 2024-01-12 | Energy efficiency control system and energy efficiency control method for coupling electrolysis hydrogen production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117888143A true CN117888143A (en) | 2024-04-16 |
Family
ID=90648568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410050307.6A Pending CN117888143A (en) | 2024-01-12 | 2024-01-12 | Energy efficiency control system and energy efficiency control method for coupling electrolysis hydrogen production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117888143A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3107396A1 (en) * | 2018-07-27 | 2020-01-30 | Tokuyama Corporation | Gas production apparatus and gas production method |
| CN114318390A (en) * | 2021-11-19 | 2022-04-12 | 中国华能集团清洁能源技术研究院有限公司 | Circulating heat exchange system |
| CN114606509A (en) * | 2021-10-18 | 2022-06-10 | 中国科学院广州能源研究所 | Heat management system and method for hydrogen production electrolytic cell array |
| CN115029718A (en) * | 2022-06-15 | 2022-09-09 | 阳光氢能科技有限公司 | Hydrogen production system and control method thereof |
| CN115323419A (en) * | 2022-09-19 | 2022-11-11 | 中国长江三峡集团有限公司 | Alkaline electrolyzed water hydrogen production equipment and control method thereof |
| CN115679377A (en) * | 2022-09-21 | 2023-02-03 | 宁夏宝丰能源集团股份有限公司 | Take waste heat recovery's brineelectrolysis hydrogen manufacturing system |
| CN116024594A (en) * | 2022-12-28 | 2023-04-28 | 武汉兴达高技术工程有限公司 | Alkaline water electrolysis hydrogen production system and method |
| WO2023116015A1 (en) * | 2021-12-22 | 2023-06-29 | 无锡隆基氢能科技有限公司 | Hydrogen production apparatus and method for controlling temperature of electrolytic bath of hydrogen production apparatus |
| CN219603703U (en) * | 2022-12-28 | 2023-08-29 | 宝武清洁能源有限公司 | Combined type electrolytic hydrogen production equipment |
| CN116988103A (en) * | 2023-06-06 | 2023-11-03 | 中电建新能源集团股份有限公司 | Method for quickly starting mixed electrolytic tank to produce hydrogen by comprehensively utilizing system heat energy |
| CN117026268A (en) * | 2023-08-21 | 2023-11-10 | 陕西清能动力科技有限公司 | Multi-tank parallel alkaline water electrolysis hydrogen production and waste heat recovery system |
| WO2023226425A1 (en) * | 2022-05-23 | 2023-11-30 | 阳光氢能科技有限公司 | Hydrogen production system, and thermal management method and apparatus therefor |
-
2024
- 2024-01-12 CN CN202410050307.6A patent/CN117888143A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3107396A1 (en) * | 2018-07-27 | 2020-01-30 | Tokuyama Corporation | Gas production apparatus and gas production method |
| CN114606509A (en) * | 2021-10-18 | 2022-06-10 | 中国科学院广州能源研究所 | Heat management system and method for hydrogen production electrolytic cell array |
| CN114318390A (en) * | 2021-11-19 | 2022-04-12 | 中国华能集团清洁能源技术研究院有限公司 | Circulating heat exchange system |
| WO2023116015A1 (en) * | 2021-12-22 | 2023-06-29 | 无锡隆基氢能科技有限公司 | Hydrogen production apparatus and method for controlling temperature of electrolytic bath of hydrogen production apparatus |
| WO2023226425A1 (en) * | 2022-05-23 | 2023-11-30 | 阳光氢能科技有限公司 | Hydrogen production system, and thermal management method and apparatus therefor |
| CN115029718A (en) * | 2022-06-15 | 2022-09-09 | 阳光氢能科技有限公司 | Hydrogen production system and control method thereof |
| CN115323419A (en) * | 2022-09-19 | 2022-11-11 | 中国长江三峡集团有限公司 | Alkaline electrolyzed water hydrogen production equipment and control method thereof |
| CN115679377A (en) * | 2022-09-21 | 2023-02-03 | 宁夏宝丰能源集团股份有限公司 | Take waste heat recovery's brineelectrolysis hydrogen manufacturing system |
| CN116024594A (en) * | 2022-12-28 | 2023-04-28 | 武汉兴达高技术工程有限公司 | Alkaline water electrolysis hydrogen production system and method |
| CN219603703U (en) * | 2022-12-28 | 2023-08-29 | 宝武清洁能源有限公司 | Combined type electrolytic hydrogen production equipment |
| CN116988103A (en) * | 2023-06-06 | 2023-11-03 | 中电建新能源集团股份有限公司 | Method for quickly starting mixed electrolytic tank to produce hydrogen by comprehensively utilizing system heat energy |
| CN117026268A (en) * | 2023-08-21 | 2023-11-10 | 陕西清能动力科技有限公司 | Multi-tank parallel alkaline water electrolysis hydrogen production and waste heat recovery system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114087904B (en) | Electric hydrogen production waste heat utilization device and method | |
| CN115233256A (en) | Temperature control system for electrolytic cell for hydrogen production by water electrolysis | |
| CN216592931U (en) | Electric hydrogen production waste heat utilization device | |
| CN114322044B (en) | Comprehensive energy system and operation control method thereof | |
| CN216107235U (en) | Waste heat recovery process system of large alkaline electrolyzed water hydrogen production device | |
| CN204648396U (en) | A kind of series connection heat supply network of 350MW high back pressure thermal power plant unit | |
| CN113611894A (en) | Hydrogen fuel cell waste heat utilization system | |
| CN116202128B (en) | Method for heating by utilizing compressed air energy storage compression heat waste heat | |
| CN117888143A (en) | Energy efficiency control system and energy efficiency control method for coupling electrolysis hydrogen production | |
| CN202119095U (en) | Waste heat recovery and heat exchange device | |
| CN217761108U (en) | Fused salt heat storage depth peak regulation system of generator set | |
| CN217872941U (en) | Fused salt energy storage system for thermal power heat exchange and electrical heating | |
| CN114381756B (en) | Hydrogen production device by water electrolysis | |
| CN114046615B (en) | Hydrogen fuel cell and heat pump interconnection system | |
| CN216120380U (en) | Hydrogen fuel cell waste heat utilization system | |
| CN115264563A (en) | Heat storage peak regulation and energy-saving steam supply thermodynamic system | |
| CN215481312U (en) | Hydrogen production system combined with photo-thermal device | |
| CN215260569U (en) | Winter raw water heating system based on waste heat of heat supply steam condensate of thermal power plant | |
| CN205481240U (en) | Novel series connection heat supply network drainage system | |
| CN114318390A (en) | Circulating heat exchange system | |
| CN220083698U (en) | Graphitization furnace cooling system | |
| CN220926972U (en) | Alkali lye electrolyzer grouping waste heat utilization system | |
| CN220543961U (en) | Waste heat recovery system based on cogeneration of hydrogen fuel cells | |
| CN220041407U (en) | Nuclear power unit system based on fused salt heat storage coupling | |
| CN217052431U (en) | Circulating heat exchange system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |