CN115261882A - Electrolytic tank parallel system and operation process thereof - Google Patents
Electrolytic tank parallel system and operation process thereof Download PDFInfo
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- CN115261882A CN115261882A CN202210364071.4A CN202210364071A CN115261882A CN 115261882 A CN115261882 A CN 115261882A CN 202210364071 A CN202210364071 A CN 202210364071A CN 115261882 A CN115261882 A CN 115261882A
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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
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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
- C25B9/70—Assemblies comprising two or more cells
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses an electrolytic bath parallel system, which comprises heat management equipment and an electrolytic bath; the thermal management device is capable of storing and releasing heat; the number of the electrolytic tanks is at least two, and all the electrolytic tanks are connected in parallel; a hydrogen outlet of the electrolytic cell is communicated with the hydrogen heat exchanger, an oxygen outlet of the electrolytic cell is communicated with the oxygen heat exchanger, and an electrolyte inlet of the electrolytic cell is communicated with the liquid heat exchanger; the hydrogen heat exchanger and the oxygen heat exchanger are respectively communicated with the heat management equipment through pipelines and are used for transferring heat to the heat management equipment for storage. The heat management equipment in the electrolytic cell parallel system is respectively communicated with the hydrogen heat exchanger and the oxygen heat exchanger through pipelines, so that waste heat of the electrolytic cell is stored to the heat management equipment through the heat exchangers, waste caused by direct emptying of heat at the heat exchangers is avoided, energy consumption is reduced, the electrolytic cell parallel system is particularly suitable for the condition that a plurality of electrolytic cells work simultaneously, and the energy consumption can be obviously reduced. The invention also provides an operation process for the electrolytic cell parallel system.
Description
Technical Field
The invention relates to the technical field of hydrogen production, in particular to an electrolytic cell parallel system and an operation process of the electrolytic cell parallel system.
Background
The electrolytic cell is a core device in the hydrogen production equipment, the hydrogen production amount of a single electrolytic cell is limited, a plurality of electrolytic cells are generally required to produce hydrogen in order to realize large-scale production, and although the hydrogen production amount is increased, the problems are also large. The heat generated by a single electrolytic cell in the working process is taken away by oxygen and hydrogen and naturally exhausted to the atmosphere after passing through the heat exchanger, so that energy waste is caused, and especially, the energy consumption is obviously increased due to the simultaneous working of a plurality of electrolytic cells.
In summary, the problem to be solved by the technical staff in the art is how to avoid the waste heat of the electrolysis bath from being naturally exhausted to the atmosphere after passing through the heat exchanger, which causes energy waste, and especially increases the energy consumption for hydrogen production by a plurality of electrolysis baths.
Disclosure of Invention
In view of this, the invention provides an electrolytic cell parallel system, wherein a heat management device of the electrolytic cell parallel system is respectively communicated with a hydrogen heat exchanger and an oxygen heat exchanger through pipelines, so that heat taken away by hydrogen and oxygen in the electrolytic cell is stored in the heat management device through the heat exchangers, waste caused by direct evacuation of the heat at the heat exchangers is avoided, and especially, energy consumption of hydrogen production of a plurality of electrolytic cells is reduced. The invention also provides an operation process for the electrolytic bath parallel system, which effectively recovers the waste heat of the electrolytic bath and reduces the energy consumption.
In order to achieve the purpose, the invention provides the following technical scheme:
an electrolytic cell parallel system comprising:
a thermal management device capable of storing and releasing heat;
at least two electrolytic tanks, wherein each electrolytic tank is connected in parallel; a hydrogen outlet of the electrolytic cell is communicated with the hydrogen heat exchanger, an oxygen outlet of the electrolytic cell is communicated with the oxygen heat exchanger, and an electrolyte inlet of the electrolytic cell is communicated with the liquid heat exchanger;
the hydrogen heat exchanger and the oxygen heat exchanger are respectively communicated with the heat management equipment through pipelines and are used for transferring heat to the heat management equipment for storage.
Preferably, in the parallel electrolytic cell system, each of the electrolytic cells is connected in parallel by:
each electrolytic cell is respectively provided with a different hydrogen heat exchanger, a different oxygen heat exchanger and a different liquid heat exchanger; and the electrolyte is separated from the hydrogen discharged by each hydrogen heat exchanger through a hydrogen dispenser, the electrolyte is separated from the oxygen discharged by each oxygen heat exchanger through an oxygen dispenser, and the electrolyte is conveyed to each liquid heat exchanger through the same circulating pump.
Preferably, in the parallel electrolytic cell system, the liquid heat exchanger is communicated with the heat management device through a pipeline, and the heat management device is used for providing heat for the liquid heat exchanger.
Preferably, in the parallel electrolytic cell system, the heat management device is configured to provide the electrolytic cell waste heat collected by the oxygen heat exchanger and the hydrogen heat exchanger to the liquid heat exchanger.
Preferably, in the electrolytic cell parallel system, the heat management device is used for supplying heat to the liquid heat exchanger corresponding to the electrolytic cell in the working state and supplying heat to the liquid heat exchanger corresponding to the electrolytic cell to be started.
Preferably, in the parallel system of the electrolytic cells, the liquid heat exchanger is used for supplying electrolyte at a preset temperature to the electrolytic cells.
Preferably, in the parallel system of electrolytic cells, a shut-off valve is provided on each pipe connecting each heat exchanger and the heat management device.
An operation process of an electrolytic cell parallel system is used for the electrolytic cell parallel system in any one of the technical schemes, and is characterized by comprising the following steps:
and operating part of the electrolytic tanks, keeping the pipelines between the heat exchangers corresponding to the operated electrolytic tanks and the heat management equipment smooth, and keeping the pipelines between the rest heat exchangers and the heat management equipment cut off.
Preferably, in the above operation process, the method further comprises:
and enabling pipelines between the liquid heat exchangers corresponding to the first preset number of non-operating electrolytic tanks and the heat management equipment to be smooth, and enabling the liquid heat exchangers to provide electrolyte with preset temperature for the first preset number of non-operating electrolytic tanks.
Preferably, in the above operation process, when the first preset number of non-operating electrolytic cells reach the preset temperature, the pipeline between the liquid heat exchanger and the heat management device corresponding to the second preset number of non-operating electrolytic cells is unblocked, and the liquid heat exchanger supplies the electrolyte at the preset temperature to the second preset number of non-operating electrolytic cells.
The invention provides an electrolytic bath parallel system, which comprises heat management equipment and an electrolytic bath; the thermal management device is capable of storing and releasing heat; the number of the electrolytic tanks is at least two, and all the electrolytic tanks are connected in parallel; a hydrogen outlet of the electrolytic cell is communicated with the hydrogen heat exchanger, an oxygen outlet of the electrolytic cell is communicated with the oxygen heat exchanger, and an electrolyte inlet of the electrolytic cell is communicated with the liquid heat exchanger; the hydrogen heat exchanger and the oxygen heat exchanger are respectively communicated with the heat management equipment through pipelines and are used for transferring heat to the heat management equipment for storage.
The electrolytic cell parallel system provided by the invention is additionally provided with the heat management equipment, and the heat management equipment is respectively communicated with the hydrogen heat exchanger and the oxygen heat exchanger through pipelines, so that heat taken away by hydrogen and oxygen in the electrolytic cell is stored to the heat management equipment through the heat exchangers, waste caused by direct emptying of the heat at the heat exchangers is avoided, the energy consumption is reduced, the electrolytic cell parallel system is particularly suitable for the condition that a plurality of electrolytic cells work simultaneously, and the energy consumption can be obviously reduced.
The invention also provides an operation process for the electrolytic bath parallel system, which effectively recovers the waste heat of the electrolytic bath and reduces the energy consumption.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of an electrolytic cell parallel system provided in example 1 of the present invention;
FIG. 2 is a schematic structural view of an electrolytic cell parallel system provided in example 2 of the present invention;
wherein, in fig. 1-2:
Detailed Description
The embodiment of the invention discloses an electrolytic cell parallel system, wherein heat management equipment is respectively communicated with a hydrogen heat exchanger and an oxygen heat exchanger through pipelines, so that heat taken away by hydrogen and oxygen in an electrolytic cell is stored in the heat management equipment through the heat exchangers, waste caused by direct emptying of the heat at the heat exchangers is avoided, and especially, the energy consumption of hydrogen production of a plurality of electrolytic cells is reduced. The embodiment of the invention also discloses an operation process for the electrolytic tank parallel system, which effectively recovers the waste heat of the electrolytic tank and reduces the energy consumption.
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. 1-2, an embodiment of the invention provides an electrolytic cell parallel system, including a heat management device and an electrolytic cell; the thermal management device is capable of storing and releasing heat; at least two electrolytic baths are connected in parallel; a hydrogen outlet of the electrolytic cell is communicated with the hydrogen heat exchanger, an oxygen outlet of the electrolytic cell is communicated with the oxygen heat exchanger, and an electrolyte inlet of the electrolytic cell is communicated with the liquid heat exchanger; the hydrogen heat exchanger and the oxygen heat exchanger are respectively communicated with the heat management equipment through pipelines and are used for transferring heat to the heat management equipment for storage.
The electrolytic cell parallel system provided by the embodiment of the invention is additionally provided with the heat management equipment, and the heat management equipment is respectively communicated with the hydrogen heat exchanger and the oxygen heat exchanger through pipelines, so that heat taken away by hydrogen and oxygen in the electrolytic cell is stored to the heat management equipment through the heat exchanger, waste caused by direct emptying of the heat at the heat exchanger is avoided, the energy consumption is reduced, the electrolytic cell parallel system is particularly suitable for the condition that a plurality of electrolytic cells work simultaneously, and the energy consumption can be obviously reduced.
In the electrolytic cell parallel system, the parallel structure of each electrolytic cell can adopt any one of the following forms:
1. as shown in fig. 1, each electrolytic cell is equipped with a different set of heat exchangers, each set of heat exchanger includes a hydrogen heat exchanger, an oxygen heat exchanger and a liquid heat exchanger, the hydrogen discharged from each hydrogen heat exchanger is separated into electrolyte by a hydrogen dispenser, the oxygen discharged from each oxygen heat exchanger is separated into electrolyte by an oxygen dispenser, and the electrolyte at the separation position of all dispensers is delivered to each liquid heat exchanger by a same circulating pump.
Specifically, each electrolytic cell may be equipped with an independent hydrogen dispenser and an independent oxygen dispenser, or each electrolytic cell uses the same hydrogen dispenser and the same oxygen dispenser, or some electrolytic cells use the same hydrogen dispenser and the same oxygen dispenser, and the remaining electrolytic cells respectively use independent hydrogen dispensers and independent oxygen dispensers, which may be specifically set according to the output of each electrolytic cell and the capacity of the hydrogen dispensers and the oxygen dispensers, which is not limited in this embodiment.
2. As shown in fig. 2, in all the electrolytic cells, part of the electrolytic cells are connected to the same whole set of heat exchangers to realize mutual parallel connection, and other electrolytic cells are respectively connected to different whole sets of heat exchangers; electrolyte separated from hydrogen liquid and oxygen liquid corresponding to all the heat exchangers is conveyed to all the liquid heat exchangers through the same circulating pump, so that all the electrolytic tanks are connected in parallel.
In this scheme, each set of heat exchanger may correspond to an independent hydrogen component liquid and an independent oxygen component liquid, or each set of heat exchanger corresponds to the same hydrogen component liquid and the same oxygen component liquid, or a part of the set of heat exchanger corresponds to the same hydrogen component liquid and the same oxygen component liquid, and the remaining electrolytic cell respectively applies an independent hydrogen component liquid and an independent oxygen component liquid, which is not limited in this embodiment.
3. All electrolysis cells are connected to the same set of heat exchangers.
The electrolytic cells in the electrolytic cell parallel system provided by the embodiment are connected in parallel, so that part or all of the electrolytic cells can be conveniently opened according to needs in actual production, and the opening number of the electrolytic cells can be increased or decreased at any time, thereby not only meeting the yield requirement, but also avoiding excess production and increasing energy consumption.
The energy stored by the heat management equipment can be matched with other waste heat utilization systems to realize reutilization, but in order to simplify the structure and improve the quick starting efficiency of the electrolytic cell parallel system, in the electrolytic cell parallel system, the heat management equipment is also communicated with the liquid heat exchanger through a pipeline and provides heat for the liquid heat exchanger.
Specifically, the heat management equipment is used for providing the electrolytic cell waste heat collected by the oxygen heat exchanger and the hydrogen heat exchanger to the liquid heat exchanger, so that the electrolytic cell waste heat is recycled to the electrolytic cell for reuse, and the energy consumption of the electrolytic cell is reduced to the maximum extent.
Preferably, the heat management device is used for supplying heat to the liquid heat exchanger corresponding to the electrolytic cell under working (namely, the liquid heat exchanger communicated with the electrolyte inlet of the electrolytic cell under working) so as to ensure that the electrolytic cell is maintained at normal working temperature; meanwhile, the heat management equipment is also used for providing heat for the liquid heat exchanger corresponding to the electrolytic cell to be started (namely, the liquid heat exchanger communicated with the electrolyte inlet of the electrolytic cell to be started) so as to preheat the electrolytic cell to be started, and the electrolytic cell can be conveniently and rapidly started at any time according to production needs.
Preferably, the liquid heat exchanger is used for supplying electrolyte with a preset temperature to the electrolytic cell, and the electrolyte with the preset temperature can ensure that the started electrolytic cell is maintained at a normal working state temperature (specifically 85 ° ± 5 °) so as to maximize the working efficiency; the electrolytic tank to be started can be heated to a preset temperature, so that the electrolytic tank to be started can rapidly enter a working state. Specifically, the preset temperature is 55 °.
In the electrolytic tank parallel system, the pipelines of the heat exchangers communicated with the heat management equipment are respectively provided with the stop valves, and the pipelines between the liquid heat exchanger and the electrolytic tank communicated with the liquid heat exchanger are also provided with the stop valves, so that the heat exchange conditions between the heat management equipment and different heat exchangers can be controlled by adjusting the stop valves in practical application.
The electrolytic cell parallel system can use alkaline water electrolysis to produce hydrogen, and can also use pure water electrolysis to produce hydrogen, and the embodiment is not limited. The number of the heat management devices may be one or more, and the heat management devices may store and release heat energy according to needs in an application, which is not limited in this embodiment.
The embodiment of the invention also provides an operation process of the electrolytic cell parallel system, which is used for the electrolytic cell parallel system provided by the embodiment and comprises the following steps:
and (3) operating part of the electrolytic tanks, keeping the pipeline between the heat exchanger corresponding to each operated electrolytic tank and the heat management equipment unblocked (namely opening a stop valve on the pipeline), and keeping the pipeline between the rest heat exchangers and the heat management equipment cut off (namely closing the stop valve on the pipeline).
In the operation process provided by the embodiment, the waste heat of the electrolytic cell is effectively recovered by utilizing the heat management equipment, so that the energy consumption is reduced.
Meanwhile, the operation process only enables part of the electrolytic cells to operate, enables the heat management equipment to store enough heat for preheating the electrolytic cells to be operated in the subsequent steps, and saves the starting cost of the whole electrolytic cell parallel system.
In order to rapidly open the non-operating electrolytic cell at any time in the production process so as to increase the yield, the operation process also comprises the following steps:
and enabling pipelines between the liquid heat exchangers corresponding to the first preset number of electrolytic cells which are not operated and the heat management equipment to be smooth, and enabling the liquid heat exchangers to provide electrolyte with preset temperature for the first preset number of electrolytic cells which are not operated. The preset temperature is 55 °.
The first preset number may be set to 1, and of course, the first preset number may also be set to 2, 3, and the like according to the heat storage amount of the heat management device and the actual production requirement, which is not limited in this embodiment.
Furthermore, when the first preset number of electrolytic cells which do not operate reach the preset temperature (namely the first preset number of electrolytic cells which do not operate reach the standby state), the pipeline between the liquid heat exchanger corresponding to the second preset number of electrolytic cells which do not operate and the heat management equipment can be unblocked, and the liquid heat exchanger can provide electrolyte with the preset temperature for the second preset number of electrolytic cells which do not operate. The second preset number may be set to 1, 2, 3, etc., and the embodiment is not limited.
The heat exchanger corresponding to the electrolytic cell refers to a heat exchanger communicated with the electrolytic cell, and is not described in detail herein.
The operation process provided by the embodiment can enable a single or a plurality of electrolytic cells to work simultaneously and enable a plurality of electrolytic cells to stand by, and can realize the heat recovery function generated by the electrolytic cells by adjusting the heat exchanger and the cut-off valve on the pipeline. When a plurality of electrolytic cells work simultaneously, if the hydrogen production station needs to reduce the capacity and reduce the load and closes one or more electrolytic cells, the heat of the electrolytic cell which just enters a shutdown state can be recovered by using the heat management equipment, and under the condition that the temperature of the electrolytic cell is lower during standby, the heat is supplied to the electrolytic cell in a standby cold state through the liquid heat exchanger to maintain the temperature of the electrolytic cell.
The operation process provided by the embodiment of the invention is described below by combining a specific electrolytic cell parallel system:
example 1
Referring to fig. 1, the electrolytic cell parallel system provided in this embodiment includes four electrolytic cells, wherein a hydrogen outlet of the electrolytic cell 101 is communicated with the hydrogen heat exchanger 105, an oxygen outlet is communicated with the oxygen heat exchanger 109, and an electrolyte inlet is communicated with the liquid heat exchanger 113; a hydrogen outlet of the electrolytic cell 102 is communicated with the hydrogen heat exchanger 106, an oxygen outlet is communicated with the oxygen heat exchanger 110, and an electrolyte inlet is communicated with the liquid heat exchanger 114; a hydrogen outlet of the electrolytic cell 103 is communicated with the hydrogen heat exchanger 107, an oxygen outlet is communicated with the oxygen heat exchanger 111, and an electrolyte inlet is communicated with the liquid heat exchanger 115; a hydrogen outlet of the electrolytic cell 104 is communicated with the hydrogen heat exchanger 108, an oxygen outlet is communicated with the oxygen heat exchanger 112, and an electrolyte inlet is communicated with the liquid heat exchanger 116; each heat exchanger is respectively communicated with the heat management device 117, and the hydrogen heat exchanger and the oxygen heat exchanger are used for conveying the waste heat of the electrolytic cell to the heat management device 117 for storage, and the liquid heat exchanger can heat the electrolyte by using the energy stored in the heat management device 117. And a cut-off valve is respectively arranged on the pipeline between each heat exchanger and the heat management equipment and the pipeline between each liquid heat exchanger and the electrolytic bath. All heat exchangers are connected to the same thermal management device 117. The hydrogen heat exchangers 105, 106, 107 and 108 are respectively communicated with different hydrogen dispensers, or are respectively communicated with the same hydrogen dispenser, or are partially communicated with the same hydrogen dispenser, and the rest are respectively communicated with different hydrogen dispensers. The oxygen heat exchangers 109, 110, 111, 112 are respectively communicated with different oxygen dispensers, or respectively communicated with the same oxygen dispenser, or partially communicated with the same oxygen dispenser, and the rest communicated with different oxygen dispensers.
The hydrogen produced by the electrolytic cells 101, 102, 103 and 104 goes to the respective dispensers after passing through the hydrogen heat exchangers 105, 106, 107 and 108, respectively, the oxygen produced goes to the respective dispensers after passing through the oxygen heat exchangers 109, 110, 111 and 112, respectively, and all the liquids obtained by the dispensers are conveyed to the liquid heat exchangers 113, 114, 115 and 116 by the circulating pump 118 and then returned to the electrolytic cells 101, 102, 103 and 104.
The hydrogen heat exchangers 105, 106, 107, 108, the oxygen heat exchangers 109, 110, 111, 112, and the liquid heat exchangers 113, 114, 115, 116 are respectively connected to a heat management device 117 through pipes. The heat management device 117 is provided with 12 shut-off valves 119-130 on the pipes connecting to each heat exchanger. When the heat exchanger is not needed for heat exchange, the heat storage of the heat management equipment 117 can be ensured by closing the stop valve, and the waste is reduced.
The operation process of the electrolytic bath parallel system comprises the following steps:
when part of the electrolytic cell is operating, for example, the electrolytic cell 101 is operating, the hydrogen heat exchanger 105, the oxygen heat exchanger 109, the liquid heat exchanger 113, and the liquid heat exchanger 114 are in an operating state, the shut valve 119, the shut valve 123, the shut valve 127, the shut valve 131, the shut valve 128, and the shut valve 132 are in an open state, and the remaining shut valves are in a closed state. The normal operating temperature of the cell 101 is 85 ° ± 5 °, and this temperature needs to be maintained to maximize the operating efficiency. The hydrogen and oxygen gases thus produced pass through hydrogen heat exchanger 105 and oxygen heat exchanger 109, respectively, to deliver heat to heat management device 117. The liquid separated by the knockout is sent to the electrolytic bath 101 and the electrolytic bath 102 simultaneously by the circulation pump 18. The heat management device 117 now provides heat to the liquid heat exchanger 113 and the liquid heat exchanger 114 so that the liquid entering the electrolytic cell 101 and the electrolytic cell 102 is raised to 55 deg. before being transferred to the electrolytic cell 101 and the electrolytic cell 102. The electrolytic cell 101 is in a working state, the temperature is 85 degrees +/-5 degrees, the temperature can be reduced by conveying 55 degrees of electrolyte, and the electrolytic cell 101 is ensured to be in the most suitable working state. The electrolytic cell 102 in the non-operating state is in a cold state, and the temperature of the electrolytic cell 102 is raised by conveying 55 degrees of electrolyte, so that the electrolytic cell 102 in the cold state can be rapidly in the operating state.
When the electrolyzer 101 is continuously operated and reaches the operating temperature of 85 ° ± 5 °, while the electrolyzer 102 in the standby state also reaches the standby temperature of 55 °, the shut-off valve 129 and the shut-off valve 133 can be opened so that the heat generated by the electrolyzer 101 preheats the electrolyzer 102 and the electrolyzer 103 simultaneously.
Example 2
Referring to fig. 2, the electrolytic cell parallel system provided in this embodiment includes four electrolytic cells, wherein hydrogen outlets of the electrolytic cells 101 and 102 are respectively communicated with a same hydrogen heat exchanger 105, oxygen outlets are respectively communicated with a same oxygen heat exchanger 109, and electrolyte inlets are respectively communicated with a same liquid heat exchanger 113; a hydrogen outlet of the electrolytic cell 103 is communicated with the hydrogen heat exchanger 107, an oxygen outlet is communicated with the oxygen heat exchanger 111, and an electrolyte inlet is communicated with the liquid heat exchanger 115; a hydrogen outlet of the electrolytic cell 104 is communicated with the hydrogen heat exchanger 108, an oxygen outlet is communicated with the oxygen heat exchanger 112, and an electrolyte inlet is communicated with the liquid heat exchanger 116; each heat exchanger is respectively communicated with the heat management device 117, and the hydrogen heat exchanger and the oxygen heat exchanger are used for conveying the waste heat of the electrolytic cell to the heat management device 117 for storage, and the liquid heat exchanger can heat the electrolyte by using the energy stored in the heat management device 117. And cutoff valves are respectively arranged on pipelines between each heat exchanger and the heat management equipment and pipelines between each electrolytic cell and the corresponding liquid heat exchanger. All heat exchangers are connected to the same thermal management device 117. The hydrogen heat exchangers 105, 107 and 108 are respectively communicated with different hydrogen dispensers, or respectively communicated with the same hydrogen dispensers, or partially communicated with the same hydrogen dispensers, and the rest communicated with different hydrogen dispensers. The oxygen heat exchangers 109, 111, 112 are respectively communicated with different oxygen dispensers, or respectively communicated with the same oxygen dispenser, or partially communicated with the same oxygen dispenser, and the rest communicated with different oxygen dispensers.
The hydrogen produced by the electrolytic cells 101, 102, 103 and 104 respectively passes through the hydrogen heat exchangers 105, 107 and 108 and then goes to the respective liquid distributors, the oxygen produced by the electrolytic cells respectively passes through the oxygen heat exchangers 109, 111 and 112 and then goes to the respective liquid distributors, and the liquid obtained by all the liquid distributors is conveyed to the liquid heat exchangers 113, 115 and 116 through the circulating pump 118 and then returns to the electrolytic cells 101, 102, 103 and 104.
The hydrogen heat exchangers 105, 107, 108, the oxygen heat exchangers 109, 111, 112, and the liquid heat exchangers 113, 115, 116 are respectively connected to a heat management device 117 through pipes. The pipelines of the heat management device 117 connected with each heat exchanger are provided with 9 shut-off valves 119, 121, 122, 123, 125, 126, 127, 129 and 130. When the heat exchanger is not needed for heat exchange, the heat storage of the heat management equipment 117 can be ensured by closing the stop valve, and the waste is reduced.
The operation process of the electrolytic bath parallel system comprises the following steps:
when a part of the electrolytic cells are operating, for example, when the electrolytic cell 101 is operating, the hydrogen heat exchanger 105, the oxygen heat exchanger 109, and the liquid heat exchanger 113 are in an operating state, the cut-off valve 119, the cut-off valve 123, the cut-off valve 127, the cut-off valve 131, and the cut-off valve 132 are in an open state, and the remaining cut-off valves are in a closed state. The normal operating temperature of the cell 101 is 85 ° ± 5 °, and this temperature needs to be maintained to maximize the operating efficiency. The hydrogen and oxygen gases thus generated pass through hydrogen heat exchanger 105 and oxygen heat exchanger 109, respectively, and the heat generated is transferred to heat management device 117. The liquid separated by the knockout is sent to the electrolytic bath 101 and the electrolytic bath 102 simultaneously by the circulation pump 18. The heat management device 117 now provides heat to the liquid heat exchanger 113 so that the liquid entering the electrolytic cell 101 and the electrolytic cell 102 is raised to 55 deg. before being transferred to the electrolytic cell 101 and the electrolytic cell 102. The electrolytic cell 101 is in a working state, the temperature is 85 degrees +/-5 degrees, the temperature can be reduced by conveying 55 degrees of electrolyte, and the electrolytic cell 101 is ensured to be in the most suitable working state. The electrolytic cell 102 in the non-operating state is in a cold state, and the temperature of the electrolytic cell 102 is raised by conveying 55 degrees of electrolyte, so that the electrolytic cell 102 in the cold state can be rapidly in the operating state.
When the electrolyzer 101 continues to operate and reaches an operating temperature of 85 ° ± 5 °, while the electrolyzer 102 in standby mode also reaches a standby temperature of 55 °, the shut-off valve 129 and the shut-off valve 133 can be opened so that the heat generated by the electrolyzer 101 preheats both the electrolyzer 102 and the electrolyzer 103.
The operation process provided by the embodiment enables waste heat in the operation of the electrolytic cell to be absorbed and stored, and the stored heat energy can heat the electrolytic cell in a cold state, so that the electrolytic cell rapidly reaches the working state, the energy consumption is reduced, and the working efficiency is improved.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electrolytic cell parallel system, comprising:
a thermal management device capable of storing and releasing heat;
at least two electrolytic tanks, wherein each electrolytic tank is connected in parallel; a hydrogen outlet of the electrolytic cell is communicated with the hydrogen heat exchanger, an oxygen outlet of the electrolytic cell is communicated with the oxygen heat exchanger, and an electrolyte inlet of the electrolytic cell is communicated with the liquid heat exchanger;
the hydrogen heat exchanger and the oxygen heat exchanger are respectively communicated with the heat management equipment through pipelines and are used for transferring heat to the heat management equipment for storage.
2. The parallel electrolytic cell system according to claim 1, wherein each of the electrolytic cells is connected in parallel by:
each electrolytic cell is respectively provided with a different hydrogen heat exchanger, a different oxygen heat exchanger and a different liquid heat exchanger; and the electrolyte is separated from the hydrogen discharged by each hydrogen heat exchanger through a hydrogen dispenser, the electrolyte is separated from the oxygen discharged by each oxygen heat exchanger through an oxygen dispenser, and the electrolyte is conveyed to each liquid heat exchanger through the same circulating pump.
3. The system of claim 1, wherein the liquid heat exchanger is in communication with the heat management device via a conduit, the heat management device being configured to provide heat to the liquid heat exchanger.
4. The electrolyzer parallel system of claim 3, wherein the heat management apparatus is used to provide electrolyzer waste heat collected by the oxygen heat exchanger and the hydrogen heat exchanger to the liquid heat exchanger.
5. The parallel electrolytic cell system according to claim 3 or 4, wherein the heat management device is used for providing heat for the liquid heat exchanger corresponding to the electrolytic cell in an operating state and providing heat for the liquid heat exchanger corresponding to the electrolytic cell to be started.
6. A parallel cell system according to claim 1 or claim 3, wherein the liquid heat exchanger is adapted to supply electrolyte to the cell at a predetermined temperature.
7. The electrolytic cell parallel system according to claim 1 or 3, wherein a shut-off valve is provided on each pipe of each heat exchanger communicating with the heat management device.
8. A process for operating a parallel system of electrolytic cells according to any one of claims 1 to 7, comprising:
and operating part of the electrolytic cells, keeping the pipelines between the heat exchangers corresponding to the operated electrolytic cells and the heat management equipment smooth, and keeping the pipelines between the rest heat exchangers and the heat management equipment cut off.
9. The operational process of claim 8, further comprising:
and enabling pipelines between the liquid heat exchangers corresponding to the first preset number of non-operating electrolytic tanks and the heat management equipment to be smooth, and enabling the liquid heat exchangers to provide electrolyte with preset temperature for the first preset number of non-operating electrolytic tanks.
10. The operating process according to claim 9, wherein when the first predetermined number of non-operating electrolysis cells reach a predetermined temperature, the pipe between the liquid heat exchanger and the heat management device corresponding to the second predetermined number of non-operating electrolysis cells is unblocked, and the liquid heat exchanger supplies electrolyte at the predetermined temperature to the second predetermined number of non-operating electrolysis cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210364071.4A CN115261882A (en) | 2022-04-07 | 2022-04-07 | Electrolytic tank parallel system and operation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210364071.4A CN115261882A (en) | 2022-04-07 | 2022-04-07 | Electrolytic tank parallel system and operation process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115261882A true CN115261882A (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210364071.4A Pending CN115261882A (en) | 2022-04-07 | 2022-04-07 | Electrolytic tank parallel system and operation process thereof |
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| Country | Link |
|---|---|
| CN (1) | CN115261882A (en) |
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