EP4032160A1 - Circuit d'alimentation pour cellule d'électrolyse comprenant un dispositif de court-circuitage et un sectionneur - Google Patents
Circuit d'alimentation pour cellule d'électrolyse comprenant un dispositif de court-circuitage et un sectionneurInfo
- Publication number
- EP4032160A1 EP4032160A1 EP20776102.4A EP20776102A EP4032160A1 EP 4032160 A1 EP4032160 A1 EP 4032160A1 EP 20776102 A EP20776102 A EP 20776102A EP 4032160 A1 EP4032160 A1 EP 4032160A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- short
- circuit
- cell
- disconnector
- circuiter
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/04—Current-controlled supply systems, e.g. constant-current supply systems
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
-
- 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
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
-
- 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
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/16—Electric current supply devices, e.g. bus bars
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/205—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards for connecting electrical apparatus mounted side by side on a rail
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/001—Hot plugging or unplugging of load or power modules to or from power distribution networks
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
- H05K3/181—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating
- H05K3/187—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating means therefor, e.g. baths, apparatus
-
- 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
- Power supply circuit for electrolysis cell comprising a short-circuiting device and a disconnector
- the present invention relates to the technical field of electrical supply devices for devices operating at very high intensity such as electrolysis cells placed in series and relates in particular to a supply circuit for an electrolysis cell comprising a shorting device. circuit and a disconnector.
- Very thin copper foils can be made by an electrolysis process in an electrolytic bath comprising a cylindrical negative electrode made of titanium, called a drum, a positive electrode coated with a metal such as titanium, platinum or silver. iridium or one of their alloys and a direct current power source between 20 kA and 100 kA.
- a direct current flows between the negative electrode and the positive electrode in the electrolytic bath formed of suitable acids, copper is electro-deposited on the cylindrical negative cathode which, by rotating continuously produces sheets of copper.
- Electrolysis cells are generally electrically connected in series in large rooms where their number can reach several dozen.
- Such installations make use of high intensity currents greater than 1000 amperes and which can reach several tens of thousands of amperes or even a few hundreds of thousands of amperes for some.
- the cells are powered by large section bus bars.
- These electrolysis rooms are equipped with devices to short-circuit the cells electrolysis in isolation so that they can be maintained without stopping the electrolysis room.
- the short circuiter is connected to the cathode of the previous cell (i.e. to the current output electrode) and to the anode of the next cell (i.e. to the current input electrode). Closing this short circuiter allows all current to be deflected and the cell to be bypassed. A step of taking the cell offline is also necessary. This step is carried out by hand by disconnecting the bolted contacts which connect the supply bus bars to the anode of the cell or by removing shims located at the location of the connections. Disconnecting the anode eliminates any current flow in the tank.
- the power supply circuits of the electrolysis cells are equipped with flexible conductors adapted to move during the expansions of the various conductive power supply elements.
- These flexible conductors are either copper or aluminum braids or copper or aluminum strips. Indeed, the braids and the strips are composed of a large number of thin conductors, either in the form of strands or in the form of 1 mm sheets. of thickness approximately, which have a large surface in contact with the air while being very close to each other, or even in contact with each other. The thinness of the thickness of the conductors that make them up gives them great flexibility.
- electrolysis cells to produce copper foils with a supply current of between 20 kA and 100 kA require specific anodes compared to those generally made of graphite in electrolytic cells to produce electrolytic cells. aluminum. These specific anodes are coated with rare metals such as titanium, platinum or iridium. During the cell short-circuiting process, the anodes are traversed by a reverse current peak which can reach two to three times the nominal intensity. This phenomenon is explained in detail in the description with reference to FIG. 4. This reverse current peak degrades the coating of the anodes which requires frequent stoppages of the cell necessary to intervene. on the anode to repair or replace it, which represents significant costs.
- a short-circuiting device is described in document FR2805098 in which a resistance is associated with the short-circuiter. It is a complex device which polarizes the cell and the short-circuiting is carried out after a long time of the order of several hours corresponding to the step of unloading the cell. In addition, it is only applicable on chlorine soda electrolysis cells and is not applicable on copper electrolysis.
- the intensity of the current which passes through the cell is reduced before the short-circuiting operation in order to minimize the intensity of the peak of the reverse current.
- This step of reducing the intensity takes time and affects all the electrolysis cells of the same line supplied in series. This disrupts the functioning of the cells which then produce copper foils of poorer quality.
- the energy consumption of electrolysis cells represents an important part of the cost of production. This consumption can be improved by reducing the thermal losses through the various conductive elements constituting the circuit according to the invention.
- the aim of the invention is to overcome these drawbacks by providing an independent power supply and short-circuiting circuit of an electrolysis cell which has a low electrical resistance and which allows rapid short-circuiting. of a cell without impacting the functioning of other cells.
- Another object of the invention is to provide a power supply and short-circuiting circuit of a cell. electrolysis which makes it possible to cancel the reverse current which is created when the electrolysis cell is short-circuited and which therefore makes it possible to avoid degradation of the electrodes.
- the object of the invention is therefore an electrical supply circuit with nominal direct current comprised between 20 kA and 100 kA of an electrolysis cell comprising an upstream bus bar through which the current of the previous cell arrives, a bar downstream collector connected to the upstream bus bar of the next cell, the two upstream and downstream bus bars being connected together by means of a short-circuiter which, when closed under the action of a actuation, makes it possible to electrically connect the two bus bars together to cut the electrical supply to the cubicle.
- the circuit also comprises an anode bar equipped with an anode connection interface intended to be connected to the anode of the cell and a cathode connection interface intended to be connected to the cathode of the cell.
- the cathodic connection interface is connected to the downstream bus bar via a flexible electrical connector
- the circuit comprises means for absorbing the movement of the various constituent elements of the circuit due to thermal expansions and a disconnector connected on the one hand to the upstream bus bar and on the other hand to the anode bar, the disconnector is opened under the action of an actuating mechanism and electrically disconnects the upstream bus bar and said bar anodic to each other after a non-zero time interval Tm after the short-circuiter has been closed, the time interval Tm corresponding to the build-up time of the rated current in the short-circuiter.
- FIG. 1 represents a schematic view of the electric diagram of a line of electrolysis cells equipped with the circuit according to the invention
- FIG. 2 shows a schematic front view of the circuit according to the invention
- FIG. 3 shows a schematic and partial side view of the circuit according to the invention
- FIG. 4 represents a curve of the evolution of the current flowing in the anode in the event of the cell being switched off without the circuit according to the invention
- FIG. 5 represents a curve of the evolution of the current flowing in the anode in the event of switching off the cell equipped with the circuit according to the invention
- the electrolysis cells of a line are supplied in series by a direct current in a closed loop. Electric current flows through the various electrical elements: bus bars or bus bars, anode bar, anode connection, anode, electrolytic bath, cathode, cathode connection, cathode bar then bus bar and so on.
- FIG. 1 which represents an electrical circuit 5 of part of a line of electrolysis cells composed of three electrolysis cells 11, 21 and 31, each cell comprises an anode 111, 211 and 311 and a cathode 112 , 212 and 312.
- the current passes through the first electrolysis cell arriving through the anode, passes through the electrolytic bath and returns to the cathode to go to the anode of the next cell (or downstream cell) and and so on. So in our example, the current arrives in the anode 111, passes through the electrolytic bath of the cell
- the circuit according to the invention is an electric power supply circuit 10, 20, 30 connected to the electrodes of a cell 11, 21, 31 and which makes it possible to supply the cell with power and switch it off in the event of maintenance.
- Each circuit 10, 20 and 30 includes a short circuiter
- the disconnecting switch and the short-circuiting device are disconnecting devices for a high-current electric power supply line of the type described in document WO2014 / 068201.
- the short-circuiter 22 When it is necessary to switch off the electrolysis cell 21, the short-circuiter 22 is closed, which makes it possible to divert all the current coming from the cathode 112 of the preceding cell 11 located upstream towards the anode 311 of the next cell 31 located downstream.
- the disconnector 23 is open so as to isolate the anode 211 from the cell 21 and to suppress any current circulation in order to be able to intervene on the cell.
- the circuit according to the invention 20 is shown diagrammatically from the front in FIG. 2 where it is placed in front of the electrolysis cell 21 shown in dotted lines in the figure.
- the circuit 20 also consists of an upstream bus bar 25 through which the current arrives from the previous cell 11 and more precisely from the upstream supply circuit 10 (similar to circuit 20) of the previous cell 11, from a bar collector swallows 26 by which the current goes into the next cell 31 and more precisely in the downstream power supply circuit 30 (similar to the circuit 20) of the next cell 31 and of the short-circuiter 22.
- the short-circuiter connection pads make it possible to electrically connect the bus bars to the short-circuiter using bolted connections 225 and 226 in order to connect the two bus bars 25 and 26 together through the short-circuiter 22.
- ECOCONTACT registered trademark
- foam consisting of a metal foam skeleton selected from the group consisting of iron, cobalt, nickel and their alloys covered with at least one coating of tin, d 'indium or one of their alloys.
- the surface of the foam layer has a multitude of contact points. Thanks to these points, the foam layer has numerous contacts with the busbar on the one hand and with the connection pad on the other hand, which makes it possible to obtain high conductivity and therefore low resistance. All the bolted connections of the circuit according to the invention are equipped with a layer of ECOCONTACT metal foam placed between the surfaces in contact before they are tightened.
- An anode bar 213 is connected to the upstream bus bar via the disconnector 23.
- the disconnector is electrically connected to the two bars by two bolted connections 235 and 236.
- the anode bar 213 comprises an anode connection interface 215 intended to come to connect. the anode 211 of the cell 21 via a connecting conductor not shown in the figure.
- a cathodic connection interface 214 intended to be connected to the cathode 212 of the cell 21, is electrically connected to a flexible electrical connector 27.
- the connector 27 is electrically connected to the bar. manifold 26 by a bolted connection 275.
- the connector 27 comprises means for absorbing the movement of the various constituent elements of the circuit and of the cell due to thermal expansions.
- the devices according to the invention are connected to one another by means of a flexible electrical connector of the same type as the connector 27.
- the circuit 20 is electrically connected to the circuit 10 located upstream by means of an electrical connector.
- flexible connection 24 connected by two bolted connections 245 and 246. It is also connected to the circuit 30 located upstream by the same type of connection connector.
- the electrical connection connectors 24 include means for absorbing the movement of the bus bars due to thermal expansions.
- the short-circuiter 22 and the disconnector 23 have the same essential characteristics. They are composed of a plurality of sectioning modules described in document WO2014 / 068201. Each disconnection module is able to pass a current of approximately 3000 A, and comprises at least a first fixed contact conductor element to establish the electrical connection with a current input and a second fixed contact conductor element to establish the electrical connection. with a current output, the fixed contact elements being electrically connected by two connection pads, and at least one conductive movable contact element adapted to come into contact simultaneously with the first and second fixed contact elements under the action of an actuation mechanism. In nominal position, the short-circuiter is open while the disconnector is closed.
- the actuating mechanism is actuated to remove the contact between the fixed contact elements and the movable contact element and thus open the disconnector while in the case of the short-circuiter 22, the mechanism is operated in the other direction to bring the movable contact element into contact with the fixed contact elements and thus close the short-circuiter. Closing the short-circuiter 22 makes it possible to electrically connect the two bus bars 25 and 26 together to cut off the power supply to the cell 21.
- the disconnector and the short-circuiter of the circuit according to the invention comprise a certain number of disconnection modules in parallel, their number being adapted to the current to be disconnected.
- the disconnection modules are placed in a sealed enclosure, preferably filled with an inert gas and the two connection pads are located outside the enclosure and are each electrically connected respectively. to the first fixed contact conductor element and to the second fixed contact conductor element of all modules.
- a silver patch is fixed on the surface of each of the movable contact elements coming into contact with each of the first and second fixed contact elements.
- At least one of the fixed contact elements comprises a lower layer of aluminum, an upper layer of copper having a silver coating and an intermediate layer of foam consisting of a metal foam skeleton selected from the category. group consisting of iron, cobalt, nickel and their alloys covered with at least one coating of tin, indium or one of their alloys.
- the short-circuiter 22 has an opening capacity under load greater than the opening capacity of the disconnector 23 because the short-circuiter is actuated on load unlike the disconnector which is actuated at low load or at zero load.
- the circuit according to the invention comprises a support element 29 positioned at the center of the circuit and on which are fixed the upstream 25 and downstream bus bars 26 as well as the anode bar 213 by means of electrical insulation means. By virtue of its central position, the support element stiffens the entire circuit and in particular the parts of the circuit located close to it. In fact, the further one moves away from this element, the greater the movement of the conductors due to thermal expansion.
- the disconnector 23 and the short-circuiter 22 are placed so as to be as close as possible to the support element 29 so as to be stressed as little as possible by the movements due to the expansion of the conductors.
- the disconnector and the short-circuiter each have their own actuation mechanism.
- the actuating mechanism of the short-circuiter 22 or first actuating mechanism is a pneumatic cylinder 229 and the actuating mechanism of the disconnector 23 or second actuating mechanism is a pneumatic cylinder 239.
- the disconnector 23 is placed perpendicular to the short-circuiter so that the disconnection modules of the short-circuiter are perpendicular to the disconnection module of the disconnector 23. This makes it possible to reduce the bulk.
- the two jacks are thus placed perpendicular to each other.
- FIG. 3 represents the circuit according to the invention seen from the side and in particular the flexible electrical connector 27 seen from the side.
- the shape of the flexible electrical connector 27 is adapted to carry the current between the downstream bus bar 26 and the cathodic connection interface 214 so that it allows changes of direction and bypassing.
- the anode bar 213 all by allowing the movements of the various bars and electrical conductors and of the electrolysis cell.
- the flexible electrical connector 27 is composed of a plurality of blades 28, preferably of aluminum as can be seen in FIG. 3.
- the connector comprises eight blades, four of which are connected to each other.
- One side of the bus bar 26 and four are connected on the opposite side.
- the bolted connection 275 the connector is in tight contact against the bus bar.
- a layer of metallic foam 60 as defined above is positioned between the contacting surfaces in order to reduce the contact resistance and to improve the electrical conductivity of the connection.
- the blades are bent at at least a first angle in one direction and then at a second angle in the opposite direction to the first so that they include two folds (like a Z) and so that they are as flexible as possible and can be deformed in the two angles of the Z under the effect of temperature and of the expansion and displacement of the conductors.
- they have a very large surface area with air, an area composed by the two faces of each blade multiplied by the total number of blades and the thickness of the air layer between the blades is sufficient to allow convection. natural.
- the thickness of the slats is between 1 cm and 3 cm and the thickness between the slats is between 5 mm and 2 cm.
- the connector 24 also comprises a plurality of blades 28 each comprising at the minus one bend at an angle suited to the geometry of the connection to be made.
- the length of the blades, the number of folds and the angle of the fold are adapted to the geometry of the electrolysis cells to be fitted.
- the connector blades 24 and 27 of the circuit according to the invention have the advantage of offering a certain rigidity which facilitates mounting on the cell. Indeed, an effort of 100kg is necessary to flex them.
- the thickness of the blades relative to the strands of a braid or relative to the sheets of the strips is greater, which allows better resistance over time.
- the flexible electrical connectors 24 and 27 of the circuit according to the invention are designed to offer sufficient flexibility to allow the movement of the bus bars and other conductive elements due mainly to the thermal expansion or contraction of high intensity currents and reactions. chemicals of the cell.
- the thickness of the blades 28 is constant except at at least one different location where it exhibits a reduction in thickness.
- the blades have a reduction in thickness 271 at the location of the fold on the side of the protruding angle.
- the passage section of the blade is reduced to more than half over a length of the blade which does not exceed twice the thickness of the blade.
- This reduction at the location of the bending angles of the boards has several advantages.
- the reduction is carried out before folding, which reduces the effort required during the folding operation and facilitates folding.
- a bead of material tends to create stresses in the blade and reduces the overall elasticity of the blade.
- the connector according to the invention having blades with at least one fold or two folds in opposite directions and at least one reduction in thickness at the location of each projecting angle of the fold, has greater elasticity in the directions according to the directions. Y and Z axes than a connector with one or two bends without reduction in thickness.
- the blades 28 of the connector according to the invention also have a reduction in thickness 272 on the flat and straight part of the blades so as to increase the elasticity of the blades in the directions perpendicular to the flat surfaces of the blades, that is, that is to say in the directions of the Z axis in FIG. 3 but also in the directions of the Y axis.
- the graph of FIG. 4 represents the evolution of the current as a function of time in the short-circuiter by a curve 41 in thin lines and in the anode by a curve 42 in thick lines in the case of an electrolysis cell. supplied and short-circuited according to a supply circuit of the state of the art.
- a nominal current of 60 kA flows through the anode of the cell as long as the short-circuiter is open.
- the current decreases in the anode while the current in the short-circuiter increases progressively.
- the progressiveness of the rise and fall of the current is normal and is due to the high value of the intensity of the current.
- the current in the anode not only decreases to zero it is reversed to reach a peak with a value of 180 kA. This reverse current then gradually decreases to reach a very low value in a few hours. During the reverse current peak which lasts only a few seconds, the coating of the anodes is strongly degraded.
- the circuit according to the invention makes it possible to avoid the reverse current peak and therefore to avoid degradation of the anode of the electrolysis cell.
- the operation of the disconnector of the circuit according to the invention is linked to the operation of the short-circuiter by virtue of a synchronization of the closing and opening times of the short-circuiter and of the disconnector.
- the disconnector is set to open when the current in the anode is close to zero, which prevents the anode from being traversed by a high intensity reverse current.
- the continuous nominal current in the short-circuiter is established after a non-zero time interval Tm, comprised between 50 ms (milliseconds) and 300 ms.
- Tm non-zero time interval
- the rated current build-up time is the time the current rises from zero to the rated current in the short-circuiter after the electrical contact has been made in the short-circuiter.
- the disconnector is set to activate and to open the anode supply circuit before the end of the period Tm for establishing the nominal current in the short-circuiter or at the end of the period. establishment Tm.
- Tm the electrolysis cell is traversed by an electrolysis current decreasing to zero.
- the adjustable time Tm is linked to the physical characteristics of the electrolysis cell such as its size.
- the disconnector is opened under the action of the actuating mechanism 239 and electrically disconnects the upstream bus bar and the anode bar from each other after the non-zero time interval Tm after the short - circuiter has been closed.
- the supply circuit of the anodes is open before the current reversal in the anodes, the anodes are thus protected against any reverse current which degrades their coating.
- the time Tm can be determined either from a series of tests and measurements or from a real-time calculation.
- the circuit according to the invention has the advantage of being able to be operated remotely, which avoids human intervention near the cells.
- Each power supply circuit comprises a command and control unit comprising an interface, means for controlling the actuation of the pneumatic cylinders 229 and 239, alarms, prohibitions and voltage drop indicators. An alarm can be triggered if the permissible temperature is exceeded, if there is a lack of air, etc.
- the interface of the command and control box provides the position of the short-circuit breaker and the position of the disconnector.
- the box prevents opening of the disconnector if the short-circuiter is open and prevents opening of the short-circuiter if the disconnector is open.
- the command and control box is connected to the actuating mechanisms of the short-circuit and the disconnector and controls their opening and closing.
- the box automatically controls the time interval between the closing of the short-circuiter and the opening of the disconnector.
- Almost simultaneous actuation of the jacks is controlled by coupling the two jacks by bevel gear, and is facilitated by their positioning perpendicular to one another.
- the bus bars 25 and 26, the anode bar 213 and the flexible connectors 24 and 27 are surface treated beforehand and covered with a black coating which reduces their temperature.
- the circuit according to the invention is in the form of a module which has the advantage of being able to be prefabricated in the factory and connected directly to the electrodes of the cell in the electrolysis room.
- its installation time is reduced to a few hours compared to traditional power supply systems which are assembled piece by piece in the electrolysis room and which require several weeks.
- the use of layers of ECOCONTACT metal foam also makes it possible to reduce assembly time. Indeed, the use of foam avoids assembly by welding and allows interchangeability of the disconnector or the short-circuiter by a simple mechanical operation of unbolting, bolting.
- the circuit according to the invention is permanent and dedicated to a single cell.
- the circuit according to the invention reduces the resistance overall power supply circuit for better energy efficiency while being positioned in a small footprint in front of the cell.
- the circuit according to the invention makes it possible to combine the functions of short-circuiting the cell and isolating the anode in the same easily interchangeable circuit and having low electrical resistance.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrolytic Production Of Metals (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1910233A FR3100938B1 (fr) | 2019-09-17 | 2019-09-17 | Circuit d’alimentation pour cellule d’électrolyse comprenant un dispositif de court-circuitage et un sectionneur |
| PCT/EP2020/076029 WO2021053102A1 (fr) | 2019-09-17 | 2020-09-17 | Circuit d'alimentation pour cellule d'électrolyse comprenant un dispositif de court-circuitage et un sectionneur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4032160A1 true EP4032160A1 (fr) | 2022-07-27 |
Family
ID=69375438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20776102.4A Pending EP4032160A1 (fr) | 2019-09-17 | 2020-09-17 | Circuit d'alimentation pour cellule d'électrolyse comprenant un dispositif de court-circuitage et un sectionneur |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12168832B2 (fr) |
| EP (1) | EP4032160A1 (fr) |
| KR (1) | KR102695632B1 (fr) |
| CN (1) | CN114555867B (fr) |
| CA (1) | CA3150826A1 (fr) |
| FR (1) | FR3100938B1 (fr) |
| WO (1) | WO2021053102A1 (fr) |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH629331A5 (en) * | 1978-08-10 | 1982-04-15 | Forelec | Short-circuiter for large currents |
| DE3009098C2 (de) * | 1979-12-21 | 1983-02-24 | Schweizerische Aluminium AG, 3965 Chippis | Verfahren zur Führung des Stromes zwischen Elektrolyseöfen |
| JPS5794586A (en) * | 1980-12-03 | 1982-06-12 | Chlorine Eng Corp Ltd | Method for stopping conduction of electricity of electrolytic cell |
| US4431492A (en) * | 1982-04-20 | 1984-02-14 | Mitsubishi Keikinzoku Kogyo Kabushiki Kaisha | Aluminum electrolytic cell arrays and method of supplying electric power to the same |
| JPS6054399B2 (ja) * | 1982-04-30 | 1985-11-29 | 住友アルミニウム製錬株式会社 | アルミニウム製造用電解炉 |
| US4561949A (en) * | 1983-08-29 | 1985-12-31 | Olin Corporation | Apparatus and method for preventing activity loss from electrodes during shutdown |
| US4589966A (en) * | 1985-10-03 | 1986-05-20 | Olin Corporation | Membrane cell jumper switch |
| EP0288776A3 (fr) * | 1987-04-28 | 1989-03-22 | Texas Instruments Incorporated | Connexion d'un fil en alliage d'or à une plage de contact en aluminium dopé de cuivre d'une interconnexion d'un circuit semi-conducteur |
| US5346596A (en) * | 1990-12-21 | 1994-09-13 | De Nora Permelec S.P.A. | Method for bypassing a monopolar electrolyzer in series |
| FR2805098B1 (fr) * | 2000-02-11 | 2003-10-17 | A M C | Dispositif de court-circuitage de cellule d'electrolyse |
| JP2006291238A (ja) * | 2005-04-05 | 2006-10-26 | Sumitomo Metal Mining Co Ltd | 電解槽の電流短絡装置 |
| US8048286B2 (en) * | 2006-07-11 | 2011-11-01 | Bharat Aluminum Company Limited | Aluminum reduction cell fuse technology |
| FR2947058B1 (fr) * | 2009-06-18 | 2012-02-03 | Schneider Electric Ind Sas | Dispositif permettant de tester la presence d'un court-circuit et disjoncteur le comprenant |
| CN103108997B (zh) * | 2010-08-11 | 2017-05-17 | 奥图泰有限公司 | 用于在电精炼和电解冶金中使用的装置 |
| JP5670600B2 (ja) * | 2012-03-19 | 2015-02-18 | 旭化成ケミカルズ株式会社 | 電解セル及び電解槽 |
| CN102703931B (zh) * | 2012-05-23 | 2014-11-05 | 中国铝业股份有限公司 | 一种两端进电内斜式短路口电解槽不停电停开槽方法 |
| FR2997788B1 (fr) | 2012-11-05 | 2016-01-22 | Amc Etec | Dispositif de sectionnement d'une ligne d'alimentation electrique a courant de haute intensite |
| FR3002700B1 (fr) * | 2013-02-28 | 2015-04-03 | Alstom Technology Ltd | Architecture de barre de connexion pour convertisseur de forte puissance |
| WO2015017922A1 (fr) * | 2013-08-09 | 2015-02-12 | Rio Tinto Alcan International Limited | Dispositif d' electrolyse et ensemble anodique destines a la production d'aluminium, cellule d' electrolyse et installation comportant un tel dispositif |
| CN104674304B (zh) * | 2013-12-02 | 2017-12-22 | 贵阳铝镁设计研究院有限公司 | 一种铝电解槽应急短路装置 |
| WO2016104494A1 (fr) * | 2014-12-26 | 2016-06-30 | 旭化成株式会社 | Cathode d'électrolyse et son procédé de fabrication, et cuve d'électrolyse |
| FR3032460B1 (fr) * | 2015-02-09 | 2017-01-27 | Rio Tinto Alcan Int Ltd | Cuve d'electrolyse |
| CN104874972B (zh) * | 2015-04-30 | 2018-07-06 | 山西华圣铝业有限公司 | 一种铝电解槽短路口母线带电修复方法 |
| GB2542555A (en) * | 2015-09-16 | 2017-03-29 | Dubai Aluminium Pjsc | Removable cover and flap for easy access to the intercalary space in a series of electrolytic Hall-Héroult cells |
| GB2548571A (en) * | 2016-03-21 | 2017-09-27 | Dubai Aluminium Pjsc | Flexible electrical connector for electrolytic cell |
| WO2017174854A1 (fr) * | 2016-04-04 | 2017-10-12 | Outotec (Finland) Oy | Procédé et agencement pour la commande du circuit électrique dans un processus électrolytique |
| GB2557972A (en) * | 2016-12-21 | 2018-07-04 | Dubai Aluminium Pjsc | Electrical design for a Hall-Héroult electrolysis plant comprising a plurality of electrolytic cells connected in series, and method to start-up said plant |
| CN108277505B (zh) * | 2018-03-30 | 2023-11-17 | 河南中孚技术中心有限公司 | 铝电解槽短路口节能装置及节能维护方法 |
-
2019
- 2019-09-17 FR FR1910233A patent/FR3100938B1/fr active Active
-
2020
- 2020-09-17 CN CN202080073118.0A patent/CN114555867B/zh active Active
- 2020-09-17 EP EP20776102.4A patent/EP4032160A1/fr active Pending
- 2020-09-17 US US17/761,333 patent/US12168832B2/en active Active
- 2020-09-17 CA CA3150826A patent/CA3150826A1/fr active Pending
- 2020-09-17 WO PCT/EP2020/076029 patent/WO2021053102A1/fr not_active Ceased
- 2020-09-17 KR KR1020227011302A patent/KR102695632B1/ko active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114555867A (zh) | 2022-05-27 |
| CN114555867B (zh) | 2025-04-22 |
| FR3100938B1 (fr) | 2023-03-03 |
| WO2021053102A1 (fr) | 2021-03-25 |
| US20220341048A1 (en) | 2022-10-27 |
| KR102695632B1 (ko) | 2024-08-14 |
| KR20220058938A (ko) | 2022-05-10 |
| US12168832B2 (en) | 2024-12-17 |
| FR3100938A1 (fr) | 2021-03-19 |
| CA3150826A1 (fr) | 2021-03-25 |
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