WO2023110208A2 - Elektrolyseur, einsatz für einen elektrolyseur, zuleitungsrohr für einen elektrolyseur und ableitungsrohr für einen elektrolyseur - Google Patents
Elektrolyseur, einsatz für einen elektrolyseur, zuleitungsrohr für einen elektrolyseur und ableitungsrohr für einen elektrolyseur Download PDFInfo
- Publication number
- WO2023110208A2 WO2023110208A2 PCT/EP2022/080252 EP2022080252W WO2023110208A2 WO 2023110208 A2 WO2023110208 A2 WO 2023110208A2 EP 2022080252 W EP2022080252 W EP 2022080252W WO 2023110208 A2 WO2023110208 A2 WO 2023110208A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- electrolyser
- insert
- lines
- discharge pipe
- Prior art date
Links
- 239000003792 electrolyte Substances 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- 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
- C25B9/75—Assemblies comprising two or more cells of the filter-press type having bipolar electrodes
-
- 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
- C25B15/06—Detection or inhibition of short circuits in the 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
- 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
- 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
- C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms
Definitions
- Electrolyser insert for an electrolyser, supply pipe for an electrolyser and discharge pipe for an electrolyser
- the invention relates to an electrolyzer with a plurality of cell elements and with a supply pipe and a discharge pipe for supplying and draining electrolyte to and from the cell elements. Furthermore, the invention relates to an insert for such an electrolyzer, a supply pipe for such an electrolyzer and a discharge pipe for such an electrolyzer.
- electrolysis In electrolysis, by impressing an electric current through suitable cell elements, redox reactions can be forced, which are associated with material conversions.
- a device for this purpose is called an electrolyser and can be used to produce important raw materials for the chemical industry.
- anode and cathode half-spaces are separated by means of diaphragms (or membranes), which enable electrical conductivity (ion and/or proton exchange) but prevent material exchange.
- diaphragms or membranes
- liquid electrolytes are used in electrolysers, which are changed or are used up, these can be continuously renewed during the process by means of appropriate supply lines and discharge lines.
- the material conversion rates are generally given narrow limits for given cell elements due to current density limitations. For large-scale use, the active cell element area must therefore be increased in order to increase the material conversion rates.
- a technically useful and frequently used method is the arrangement of many (same) cell elements in a stack.
- the electrical connection of the cell elements of a stack represents a series connection, d . H .
- the anode of a cell element N is electrically conductively connected to the cathode of cell element N+1 and the cathode of cell element N is electrically conductively connected to the anode of cell element N-1.
- the series connection also reduces the low cell element voltage from a few volts to e.g. several hundred volts multiplied .
- the hydraulic connection of the cell elements of a stack for the supply of fresh electrolyte represents a parallel connection.
- the hydraulic interconnection of the cell elements to form a stack creates additional and undesired electrically conductive connections between all cell elements.
- d. H the application of an electrical voltage or When an electric current is impressed from the first to the last cell element, an electric working current flows through all cell elements:
- undesired so-called electric stray currents also flow on the various parallel current paths.
- these electrical stray currents lead to local excess current densities close to the supply lines and discharge lines of the electrolyte. This can lead to premature aging and destruction of the membranes and failure of the entire stack.
- a reduction in the electrical stray currents can be achieved by increasing the electrical resistance of the leads and leads of the electrolyte.
- the previous solution envisages lengthening the incoming and outgoing lines, which results in an increase in resistance with the same cross-sectional areas.
- the line extensions disadvantageously lead to increased flow resistance and increased material requirements for production.
- an electrolyzer with a plurality of cell elements, and with a supply pipe and a discharge pipe for supplying and discharging electrolyte to and away from the cell elements, the supply pipe and/or the discharge pipe being at least two electrically isolated from each other, at least in sections has separately formed partial lines, the partial lines extending in the supply pipe with a predetermined length in the opposite direction to the electrolyte flow direction and/or in the discharge pipe with a predetermined length in the direction of the electrolyte flow direction.
- a supply pipe or Discharge pipe is understood as an elongate hollow body, the length of which is significantly greater than its diameter.
- a tube is made of relatively inflexible material.
- the supply pipe and the discharge pipe can be designed so stiff f that a manual deformation as in a hose such. B. also a corrugated hose, is impossible, but here a tool is required.
- the plurality of cell elements which form a stack, is divided into at least two cell element groups, which are electrically insulated from one another, by the at least two sub-lines, which are galvanically isolated from one another at least in sections.
- the partial lines extend in the supply pipe with a predetermined length in the opposite direction to the electrolyte flow direction and/or in the discharge pipe with a predetermined length in the direction of the electrolyte flow direction.
- the current path lengthening can be increased again. It is particularly advantageous if the sub-lines extend with a predetermined length in the supply pipe counter to the electrolyte flow direction and in the discharge pipe with a predetermined length in the direction of the electrolyte flow direction.
- the sub-lines are designed as sub-lines formed concentrically to one another.
- an inner partial line can have a circular cross-section, while outer partial lines each have an annular cross-sectional area.
- the sub-lines can thus be designed to take up particularly little space.
- the partial lines are each designed to provide the same cross-sectional area. This ensures that each cell element group can be supplied with the same amount of electrolyte per unit of time. This enables a particularly simple structure, since each of the cell element groups can have the same number of cell elements.
- the partial lines are formed by inserting them into the supply pipe and/or into the discharge pipe. In this way, the partial lines can be formed in a particularly simple manner.
- the insert has at least one pipe section and a ring element assigned to each pipe section, the respective ring element extending radially outwards from the pipe section and terminating at least one partial line.
- the insert can advantageously be designed in one piece and/or from the same material and thus makes it possible to form the plurality of partial lines by mounting only one component.
- the invention also includes an insert for such an electrolyzer, a supply pipe and a discharge pipe for such an electrolyzer.
- FIG. 1 a schematic representation of components of an electrolyzer
- FIG. 2 shows a schematic representation of an insert for the electrolyzer shown in FIG. 1;
- FIG. 3 shows a schematic representation of further details of the insert shown in FIG. 2;
- FIG. 4 shows a schematic representation of a combination of the DC converter shown in FIGS. 1 to 3 with a rectifier
- FIG. 5 shows a schematic representation of a further insert for the electrolyzer shown in FIG.
- An electrolyzer 2 is shown.
- the electrolyzer 2 has a plurality of cell elements 4 which form a stack 10 and are electrically connected in series. Furthermore, the electrolyzer 2 in the present exemplary embodiment has a feed pipe 6 and a discharge pipe 8 each with a circular cross section, with which electrolyte can first be fed to the cell elements 4 and then removed from the cell elements 4 . To this end, both the supply pipe 6 as well as the discharge pipe 8 each have a plurality of outlet and inlet openings (not shown).
- an insert 14 is used in each case in the feed pipe 6 and in the discharge pipe 8 .
- the insert 14 has a tubular section 16a with a circular cross section and an annular element 18a assigned to the tubular section 16a.
- the ring element 18a extends radially outwards from the tube section 16a.
- the insert 14 is designed in one piece and/or from the same material.
- the insert 14 like the supply pipe 6 and the instructions 8—is made of an electrically insulating material.
- the respective ring element 18a comes into contact with the inner wall of the supply pipe 6 or the discharge pipe 8 and thus provides a termination which, in the present exemplary embodiment, is an outer partial line 12a of two partial lines 12a, 12b closes, in which case additional seals can be provided for sealing.
- the supply pipe 6 and the discharge pipe 8 are in the present exemplary embodiment from the section in which the respective inserts 14 are rigid and flexible in comparison thereto in the remaining portion.
- the outer partial line 12a of the two partial lines 12a, 12b is designed to have a concentric annular cross section.
- the inner partial line 12a has a circular cross section.
- both cross-sectional areas are of the same size, i.e. the annular cross-sectional area of the outer sub-line 12a is equal to the circular cross-sectional area of the inner sub-line 12b.
- Supporting elements can be provided to support the two partial lines 12a, 12b.
- the inserts 14 inserted in the supply pipe 6 and the discharge pipe 8 each extend in the case of the supply pipe 6 with a predetermined length L in the opposite direction to the electrolyte flow direction E and in the case of the discharge pipe 8 with the predetermined length L in the direction of the Electrolyte flow direction E.
- the respective lengths L are the same. Deviating from the present exemplary embodiment, however, they can also be of different sizes.
- the length L has a value in the range from 0.5 m to 3 m, for example 2 m. Insertion of the insert 14 separates the front half of the stack 10 from the back half. Stray electrical currents which exit from the rear half and enter the front half are thus forced onto extended current paths S. The extended current paths S are connected to an increased ohmic resistance, which reduces the electrical stray current intensities. In this way, a maximum of the electric stray current density can be reduced to 71%.
- the present exemplary embodiment according to FIG. 5 differs from the previous exemplary embodiment in that four pipe sections 16a, 16b, 16c, 16d are provided, with each of the four pipe sections 16a, 16b, 16c, 16d each having a ring element 18a, 18b , 18c, 18d.
- the insert 14 forms five partial lines 12a, 12b, 12c, 12d, 12e, of which the innermost partial line 12a has a circular cross-sectional area and the remaining partial lines 12b, 12c, 12d, 12e each have an annular cross-sectional area .
- the circular cross-sectional area and the respective annular cross-sectional areas are each of the same size and arranged concentrically around the axis of the pipe sections 16a, 16b, 16c, 16d.
- the equal area ensures that each cell element group, here five cell element groups, can be supplied with the same amount of electrolyte per unit of time.
- a maximum of the stray electric current density can be reduced to 52%, and with a value for the length L of 2 m, a maximum of the stray electric current density can be reduced to 46%.
- other cross-sectional area shapes can also be formed, such as e.g. B. rectangular or square and frame-shaped cross-sectional shapes.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280082771.2A CN118510943A (zh) | 2021-12-17 | 2022-10-28 | 电解装置以及用于电解装置的插入件、输入管和排出管 |
AU2022411782A AU2022411782A1 (en) | 2021-12-17 | 2022-10-28 | Elektrolyzer, use for an elektrolyzer, feed pipe for an electrolyzer and discharge pipe for an electrolyzer |
EP22817873.7A EP4426881A2 (de) | 2021-12-17 | 2022-10-28 | Elektrolyseur, einsatz für einen elektrolyseur, zuleitungsrohr für einen elektrolyseur und ableitungsrohr für einen elektrolyseur |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021214632.5 | 2021-12-17 | ||
DE102021214632.5A DE102021214632A1 (de) | 2021-12-17 | 2021-12-17 | Elektrolyseur, Einsatz für einen Elektrolyseur, Zuleitungsrohr für einen Elektrolyseur und Ableitungsrohr für einen Elektrolyseur |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2023110208A2 true WO2023110208A2 (de) | 2023-06-22 |
WO2023110208A3 WO2023110208A3 (de) | 2023-08-17 |
Family
ID=84389117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/080252 WO2023110208A2 (de) | 2021-12-17 | 2022-10-28 | Elektrolyseur, einsatz für einen elektrolyseur, zuleitungsrohr für einen elektrolyseur und ableitungsrohr für einen elektrolyseur |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP4426881A2 (de) |
CN (1) | CN118510943A (de) |
AU (1) | AU2022411782A1 (de) |
DE (1) | DE102021214632A1 (de) |
WO (1) | WO2023110208A2 (de) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2498209B1 (fr) * | 1981-01-16 | 1986-03-14 | Creusot Loire | Dispositif d'alimentation et evacuation d'electrolyte liquide pour electrolyseur du type filtre-presse |
JPS57174479A (en) | 1981-04-20 | 1982-10-27 | Tokuyama Soda Co Ltd | Unit electrolytic cell |
DE19607235C1 (de) | 1996-02-27 | 1997-07-17 | Forschungszentrum Juelich Gmbh | Elektrolyseur mit verminderten parasitär fließenden Strömen |
-
2021
- 2021-12-17 DE DE102021214632.5A patent/DE102021214632A1/de not_active Withdrawn
-
2022
- 2022-10-28 WO PCT/EP2022/080252 patent/WO2023110208A2/de active Application Filing
- 2022-10-28 CN CN202280082771.2A patent/CN118510943A/zh active Pending
- 2022-10-28 AU AU2022411782A patent/AU2022411782A1/en active Pending
- 2022-10-28 EP EP22817873.7A patent/EP4426881A2/de active Pending
Also Published As
Publication number | Publication date |
---|---|
EP4426881A2 (de) | 2024-09-11 |
WO2023110208A3 (de) | 2023-08-17 |
AU2022411782A1 (en) | 2024-06-13 |
DE102021214632A1 (de) | 2023-06-22 |
CN118510943A (zh) | 2024-08-16 |
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