EP3615712A1 - Procédé de fonctionnement d'un dispositif d'électrolyse de l'eau - Google Patents

Procédé de fonctionnement d'un dispositif d'électrolyse de l'eau

Info

Publication number
EP3615712A1
EP3615712A1 EP18726924.6A EP18726924A EP3615712A1 EP 3615712 A1 EP3615712 A1 EP 3615712A1 EP 18726924 A EP18726924 A EP 18726924A EP 3615712 A1 EP3615712 A1 EP 3615712A1
Authority
EP
European Patent Office
Prior art keywords
water
line
pem electrolyzer
pem
heat exchanger
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
Application number
EP18726924.6A
Other languages
German (de)
English (en)
Inventor
Stefan Höller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoeller Electrolyzer GmbH
Original Assignee
Hoeller Electrolyzer GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoeller Electrolyzer GmbH filed Critical Hoeller Electrolyzer GmbH
Publication of EP3615712A1 publication Critical patent/EP3615712A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • 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
    • C25B13/00—Diaphragms; Spacing elements
    • C25B13/04—Diaphragms; Spacing elements characterised by the material
    • C25B13/08—Diaphragms; Spacing elements characterised by the material based on organic materials
    • 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
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • 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
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C25B15/087—Recycling of electrolyte to electrochemical cell
    • 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
    • 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
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • 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
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
    • 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
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • 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

Definitions

  • the invention relates to a method for operating a water electrolysis device for generating hydrogen and oxygen according to the features specified in the preamble of claim 1 and to a water electrolysis device for carrying out this method according to the features specified in the preamble of claim 5.
  • Heat exchanger provided, which on the primary side of the ion exchanger and on the secondary side leads the discharged water from the ion exchanger in countercurrent to improve this temperature issue.
  • it is also a cooling device
  • the object of the invention is to improve a method for operating a water-electrolyte device, in particular with regard to the efficiency and service life of the PEM electrolyzer.
  • a water electrolysis apparatus is to be provided with which such an improved method can be carried out.
  • PEM electrolyzer in the sense of the present invention is typically understood to mean a stack of PEM electrolyzer cells, such as
  • this is state of the art. If appropriate, this can also be a multiplicity of PEM electrolysis cells connected in parallel in another form.
  • water cycle or line circuit on the one hand and heat transfer circuit on the other hand are used throughout.
  • water cycle or line circuit of the primary circuit is called, in which the PEM electrolyzer and the ion exchanger lie, with heat transfer circuit of the secondary circuit, which on the secondary side through the heat exchanger arranged in front of and behind the ion exchanger 25, but in the same way with water as Heat transfer medium can be operated.
  • heat transfer circuit of the secondary circuit which on the secondary side through the heat exchanger arranged in front of and behind the ion exchanger 25, but in the same way with water as Heat transfer medium can be operated.
  • here is no demineralized or distilled
  • This measure of the change of the flow direction through the PEM electrolyzer can be used independently but advantageously also in combination with the method according to claim 2, ie not only in the operation of electrolysis devices according to the prior art, as they are exemplified by way of example.
  • the inventive method for operating a Wasserelektrolysevoriques for generating hydrogen and oxygen is used in which in a water cycle from a PEM electrolyzer coming water a first heat exchanger for cooling, followed by an ion exchanger and then a second heat exchanger for heating and is fed back to the PEM electrolyzer, the heat exchanger on the secondary side form part of a common heat transfer circuit and the heat transfer circuit has a cooling device through which the heat transfer Ström for controlling and / or regulating the temperature of the water supplied to the ion exchanger and / or the temperature of the water supplied to the PEM electrolyzer optionally completely, partially or not at all is passed.
  • the basic idea here is first of all to dispense with a cooling device in the water cycle of the electrolyzer and instead to control either the temperature of the water supplied to the ion exchanger or the temperature of the PEM electrolyzer supplied water or both temperatures, preferably to regulate by the heat carrier stream guided on the secondary side through the heat exchanger is fed completely, partially or not at all to a cooling device as required.
  • the cooling device is preferably connected via a mixing valve parallel to the second heat exchanger, so that the emerging from the cooling sonach- ström first the first heat exchanger and then wholly or partially the second heat exchanger or again the cooling device is supplied.
  • either the temperature of the water supplied to the PEM electrolyzer or the temperature of the water supplied to the heat exchanger can be regulated in the required manner using a suitable control and regulating device. If, as is also provided according to the invention, both of these temperatures are to be regulated, then it will be necessary to provide a further regulator (actuator); this may be, for example, the performance of the cooling device, ie the cooling capacity and / or the flow rate be the heat carrier circuit, which can be varied for example by appropriate control of a speed-controllable circulating pump.
  • the cooling device of the heat transfer medium circuit in the flow direction upstream of the first heat exchanger that is connected in series with this. Then it will over a mixing valve controls the flow rate which is supplied to the second heat exchanger or which is supplied to the cooling device, bypassing the second heat exchanger.
  • the cooling device should be controllable in their performance.
  • first and second heat exchangers may consist of a single heat exchanger; these may also be one or more individual heat exchangers connected in parallel and / or in series.
  • the cooling device typically has a heat exchanger whose primary side is located in the heat transfer circuit and whose secondary side can be flowed through by a cooling medium, for example air or coolant from a cooling unit.
  • a cooling medium for example air or coolant from a cooling unit.
  • This measure also contributes to the longevity of the PEM electrolyzer, since ion exchangers typically have the property when they are not flowed through, but as when shutting down electrolysis device, the medium therein is to deliver metal ions to the water, which then at the subsequent start of Vor - direction into the PEM electrolyzer and damage it. By bypassing during startup, this can be effectively prevented. The Mefallionen located there in the water cycle are then removed by re-flowing through the ion exchanger.
  • the water supplied to the PEM electrolyzer is preheated by means of a heating device.
  • a heating device This will typically be done by means of an electric heater, which heats the cold water when starting the device in the manner of a water heater.
  • the heating device need not necessarily be arranged in the primary circuit, but may also be provided in the heat transfer circuit, for example in the flow direction before the other heat exchanger, which serves anyway for heating the water supplied to the PEM electrolyzer.
  • the water electrolysis apparatus of the invention for producing hydrogen and oxygen from water has means for changing the flow direction of the PEM electrolyzer.
  • a valve arrangement is provided according to the invention, with which this is feasible.
  • a reversal of direction can also be effected by appropriate actuation of pumps, but in practice a corresponding valve arrangement will be more favorable, at least for devices of a smaller and medium design.
  • this can be done by providing two 3/2-way valves, one of the valves being connected to one of the water connections of the PEM electrolyzer and to the supply and discharge lines of the line circuit and the other valve the other line connection of the PEM electrolyzer and also connected to the supplying and discharging line of the line circuit.
  • Such 3/2-way valves are available on the market at low cost, even in the specific material requirements required here for the line circuit.
  • the valve parts which are in contact with the water cycle are, for example, coated or titanium-coated with Teflon or consist thereof.
  • the two 3/2-way valves are replaced by 3/3-way valves, then these valves can not only control a reversal of the flow direction through the PEM electrolyzer, but also a bypass operation without having to provide an additional bypass valve and a bypass line. It is particularly advantageous if these 3/3-way valves are designed according to the ball valve, since they can then be realized cost and reliable.
  • Such a directional control valve typically has three connections offset by 90 ° from one another and a ball with a T-shaped inner bore, so that in each case two of the three connections are conductively connected to one another depending on the switching position.
  • a connection of the PEM electrolyzer to the line circuit can also be effected advantageously by a 4/2-way valve, the two switching positions corresponding to the two flow directions. If, instead of the 4/2-way valve, which is advantageous, a 4/3-way valve is used, which connects in the third switching position, the supplying and discharging line of the line circuit with each other, then a single valve, both the direction reversal of the flow through the PEM electrolyzer and the bypass function for starting the electrolysis device can be realized with only one valve, which is advantageous. [22]
  • the valves will be advantageously formed of stainless steel.
  • the electrolysis device has a reversing control, which reverses at intervals the valves associated with the PEM electrolyzer in order to achieve a reversal of the direction of flow.
  • This reversal control can also be part of the control and regulating device or separately.
  • the water electrolysis device has a line circuit for the distilled, at least demineralized water in which a PEM electrolyzer, a first heat exchanger, an ion exchanger and a further heat exchanger are successively arranged, wherein the output of the further heat exchanger is conductively connected to the PEM electrolyzer.
  • the water-carrying outlet of the PEM electrolyzer is typically the oxygen-carrying outlet, from which water and oxygen emerge at the same time, which are subsequently separated, with the water being conducted in the line loop.
  • both the first and the further heat exchanger are incorporated on the secondary side in a common heat transfer circuit, said heat transfer circuit is associated with a cooling device which is variably inserted via a controllable valve in the heat transfer circuit.
  • the cooling device itself is controllable in its cooling capacity, alternatively or additionally, a control over the flow rate in the heat transfer circuit can be provided.
  • the water electrolysis device on a control and regulating device which controls the fitting or the cooling device or both for the purpose of temperature control of the ion exchanger or the PEM electrolyzer or both supplied water.
  • the control device for temperature control of the PEM electrolyzer supplied water is designed, since this temperature is crucial for the performance of the entire device.
  • this control and regulating device is integrated in the control device, for reversing the Venetian ⁇ ile to reverse the direction of flow of the PEM electrolyzer and to control the bypass.
  • the valve is a mixing valve (also called mixer), as for example from the heating technology belongs to the prior art.
  • a mixing valve can be controlled by means of a servomotor and made available at low cost. Since this is the (secondary) heat transfer circuit, a simple and cost-effective fitting from heating technology can be used here.
  • the heat transfer medium circuit is provided with a speed-controllable circulation pump whose speed is controlled by the control and regulating device.
  • a speed-controllable circulation pump whose speed is controlled by the control and regulating device.
  • Such typically frequency converter controlled circulation pumps are also available inexpensively from the heating technology and can work in wide power ranges.
  • the use of such a circulation pump is not only useful if the flow is to be used as a further control variable for a control, but even if this requirement is not met in order to operate the heat carrier circuit energetically favorable.
  • the cooling device is connected in parallel with the further heat exchanger, ie the heat exchanger between ion exchanger and PEM electrolyzer, so that the heat carrier stream leaving the cooling device is first fed to the first heat exchanger, which provides for cooling down the water entering the ion exchanger is.
  • the fitting in particular the mixing valve, can then either be incorporated into the branching line which comes from the first heat exchanger and leads to the further heat exchanger or to the cooling device or, preferably, in the mouth region of these lines, that is to say where the line from the further heat exchanger, the line coming from the cooling device and the line leading to the first heat exchanger abut each other.
  • the cooling device can be incorporated in the line leading to the first heat exchanger of the heat transfer circuit, it is then preferably a controllable in their performance cooling device. With the mixing valve is then controlled, which shares of the heat transfer flow through the other heat exchanger and which is passed to this.
  • this heater is located behind the other heat exchanger and in front of the PEM electrolyzer.
  • a heating device may be provided in the heat carrier circuit, in the flow direction upstream of the further heat exchanger on the secondary side.
  • the heater does not necessarily have to be an electric heater, it can be here Also, a heat exchanger may be provided, the other side, for example, the waste heat from an internal combustion engine leads.
  • a bypass line is provided in the line circuit parallel to the PEM electrolyzer, which can be shut off by means of a valve.
  • This bypass line can also be formed by a valve itself, as will be explained below.
  • Such a bypass line is advantageous for starting the electrolysis device in order to pass the water cycle at the PEM electrolyzer, for example, not through the electrolyzer pass through the ion exchanger in the water, which may be enriched with metal ions, but only then integrate this in the line circuit, if it is ensured that the water supplied to the PEM electrolyzer is sufficiently free of metal ions, that is, the ion exchanger is working effectively.
  • the water electrolysis device shown has a PEM electrolyzer 1, which is designed in the usual form as a stack and has a first line connection 2 and a second line connection 3, with which the stack 1 is integrated in a line circuit 4, which one from the PEM Electrolyzer 1 laxative line 5, in which the emerging from the PEM electrolyzer 1 water is supplied together with the oxygen produced therein a container 6, which serves on the one hand for the deposition of oxygen and on the other hand for feeding the electrolyzer 1 with water.
  • This container 6 is thus also a reservoir.
  • the removed by electrolysis from the line circuit 4 via the electrolyzer 1 water is a Line 7 fed to the container 6. This is demineralized or distilled water.
  • the water-bearing outlet 8 of the container 6 is connected via a circulating pump 9 with a first heat exchanger 10 whose output is line connected to the input of an ion exchanger 1 1 whose output is connected to another, here second heat exchanger 12, whose output via a 3 / 2-way valve 13 is connected to either a bypass line 14 or with a line leading to the PEM electrolyzer 15, in which an electric heater 16 is incorporated.
  • the laxative line 5 and the feeding line 15 are each connected via a 3/2-way valve with the PEM electrolyzer 1, via a first 3/2-way valve 1 7, which connects these lines to the first terminal. 2 of the electrolyzer 1 and a second 3/2-way valve 18, which connects these lines to the second port 3 of the PEM electrolyzer.
  • the water In normal operation, the water is guided in the line circuit 4, in which it is exiting from the container 6, first to the circulation pump 9 and from there through the primary side of the first heat exchanger 10 is passed. In this heat exchanger 10, the water is cooled down to a temperature (for example, below 60 ° C) to ensure that a maximum permissible operating temperature of the subsequent ion exchanger 1 1 is not exceeded. After leaving the ion exchanger 1 1, the water is fed to the second heat exchanger 12 on the primary side, in which it is heated to a temperature of, for example, 70 ° C.
  • the temperature at which the second heat exchanger 12 heats the water is selected so that the subsequent electrolysis process in the electrolyzer 1 with a high degree of efficiency and high efficiency is achieved by way of the first connection 2 or by reversing the flow direction. Expires.
  • the water leaving the electrolyzer 1 together with the oxygen is supplied to the container 6 via the second connection 3 or, if the flow is reversed, via the first connection 2 into the evacuating line 5, where gas separation takes place and the circuit 4 closes on the water side.
  • the heat exchangers 10 and 12 are associated on the secondary side with a common heat transfer circuit 20, which through a speed controllable circulation pump 21 the heat transfer medium exiting the first heat exchanger 10, typically water with additive, via a line 22 to the secondary-side input of the second heat exchanger 12 and via a line 23 to a cooling device 24 which is arranged parallel to the second heat exchanger 12 and is integrated via a mixing valve 25 in the heat transfer circuit.
  • the mixing valve combines a line 26 coming from the second heat exchanger 12 on the secondary side with a line 27 coming from the cooling device 24 into a line 28 leading to the first heat exchanger 10.
  • the cooling device 24 is not integrated into the heat transfer circuit 20, then they are the secondary sides of the heat exchangers 10 and 12 via the lines 26 and 28 connected to each other, the circulation via the pump 21 and the adjoining line 22.
  • the position of the mixing valve from this first end position to a second end position is from the second heat exchanger 12 coming line 26 is shut off from the leading to the first heat exchanger 10 line 28 and the coming of the cooling device 24 line 27 is connected to the line 28.
  • This end position is of a more theoretical nature, since the conduit 26 is not completely closed in practice.
  • a control and regulating device which ensures that the position of the mixing valve 25 is controlled so that the PEM electrolyzer 1 supplied water has a predetermined temperature of, for example, 80 ° C.
  • This temperature is decisive for the performance of the PEM electrolyzer 1 and thus also of the entire electrolysis device.
  • the mixing valve 25 by controlling the mixing valve 25, the water temperature supplied to the ion exchanger 10 can also be regulated.
  • a secondary control is superimposed here, either by speed control of the circulation pump 21 or by controlling the performance of the Cooling device 24 takes place.
  • this control and regulating device ensures that when the electrolysis device starts up, ie when the water in the circuit 4 does not yet have the desired operating temperature, it is preheated via the electric heater 16.
  • the 3/2-way valve is reversed in such a way via a starting control that the PEM electrolyzer 1 is bridged by the bypass line 14, that is to say that the light emerging from the ion exchanger 1 1 and through the second heat exchanger.
  • shear 12 guided water initially not the PEM electrolyzer 1, but the recirculating line 5 and thus the container 6 is supplied. This activation takes place until it is ensured that the entire water contained in the ion exchanger, which was located there, has passed into the returning line 5. Only then is the valve 13 reversed, so that the guided water in the water circuit 4 the heater 1 6 supplied and thus preheated in the PEM electrolyzer 1 passes.
  • control and regulating device ensures that the 3/2-way valves 17 and 18, which determine the direction of flow through the PEM electrolyzer 1, are reversed at intervals.
  • the 3/2-way valve 17 connects the feeding line 15 to the first line connection 2 of the PEM electrolyzer 1, wherein the line connection to the discharging line 5 is blocked, in an analogous manner, the second 3/2-way valve connects the second Line connection 3 of the PEM electrolyzer 1 with the outgoing line 5 with the line connection to the feeding line 15 is blocked.
  • the 3/2-way valve 1 7 connects the first line connection 2 of the PEM electrolyzer 1 to the outgoing line 5 and blocks the feeding line 15, whereas the second 3/2 Directional valve connects the second line connection 3 of the PEM electrolyzer 1 with the supply line 15 and the line connection to the discharging line 5 blocks.
  • the PEM electrolyzer 1 is flowed through in the reverse direction.
  • the 3/2-way valves 17, 18 3/3-way valves are provided, then the 3/2-way valve 13 and the bypass line 14 can be omitted. Then both the reversal of the flow direction and the bypass function can be realized with these two 3/3-way valves.
  • directional valves of the ball valve type can advantageously be used, which have in the valve housing 3 by 90 ° staggered line connections, as shown schematically in the figure in the valves 1 7 and 18 and having a valve body in the form of a ball, which has a cross-sectionally T-shaped through hole, with which, depending on the switching position, two of the total of three connections are line-connected.
  • the line 23, 27 lying parallel to the second heat exchanger 12 would thus be maintained, via the mixing valve 25 then the heat carrier stream supplied to the second heat exchanger 12 and controlled in parallel via the line 23, 27 would be controlled.
  • the electric see heater is arranged in the leading to the PEM electrolyzer 1 line 15.
  • such an electric heater can also be arranged in the heat carrier circuit, typically in the direction of flow before the second heat exchanger 12, ie in the line 22.
  • Such an arrangement has the advantage that the heater does not have to be specially adapted to the requirements required for the primary circuit, but that so far inexpensive components from heating or other technology could find use.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Inorganic Chemistry (AREA)
  • Sustainable Development (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'un dispositif d'électrolyse de l'eau permettant de produire de l'hydrogène et de l'oxygène à partir de l'eau. Afin d'augmenter la durée de vie de l'électrolyseur PEM (1), la direction de l'écoulement continu est inversée par la commande correspondante des soupapes (17, 18). Cela s'effectue périodiquement de manière à ce qu'un écoulement continu, le plus constant possible, s'effectue dans les 2 directions, ce qui permet une augmentation de la durée de vie.
EP18726924.6A 2017-04-24 2018-04-23 Procédé de fonctionnement d'un dispositif d'électrolyse de l'eau Pending EP3615712A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/EP2017/059628 WO2018196947A1 (fr) 2017-04-24 2017-04-24 Procédé pour faire fonctionner un dispositif d'électrolyse de l'eau
PCT/EP2018/060347 WO2018197415A1 (fr) 2017-04-24 2018-04-23 Procédé de fonctionnement d'un dispositif d'électrolyse de l'eau

Publications (1)

Publication Number Publication Date
EP3615712A1 true EP3615712A1 (fr) 2020-03-04

Family

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Family Applications (3)

Application Number Title Priority Date Filing Date
EP17719241.6A Active EP3615711B1 (fr) 2017-04-24 2017-04-24 Procédé pour faire fonctionner un dispositif d'électrolyse de l'eau
EP18726925.3A Active EP3615713B1 (fr) 2017-04-24 2018-04-23 Procédé de fonctionnement d'un dispositif d'électrolyse de l'eau
EP18726924.6A Pending EP3615712A1 (fr) 2017-04-24 2018-04-23 Procédé de fonctionnement d'un dispositif d'électrolyse de l'eau

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP17719241.6A Active EP3615711B1 (fr) 2017-04-24 2017-04-24 Procédé pour faire fonctionner un dispositif d'électrolyse de l'eau
EP18726925.3A Active EP3615713B1 (fr) 2017-04-24 2018-04-23 Procédé de fonctionnement d'un dispositif d'électrolyse de l'eau

Country Status (9)

Country Link
US (3) US11384442B2 (fr)
EP (3) EP3615711B1 (fr)
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