EP0273819A1 - Electrolysis cell fitted with a pipe system having a compensation for differential dilatations - Google Patents

Electrolysis cell fitted with a pipe system having a compensation for differential dilatations Download PDF

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Publication number
EP0273819A1
EP0273819A1 EP87402814A EP87402814A EP0273819A1 EP 0273819 A1 EP0273819 A1 EP 0273819A1 EP 87402814 A EP87402814 A EP 87402814A EP 87402814 A EP87402814 A EP 87402814A EP 0273819 A1 EP0273819 A1 EP 0273819A1
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EP
European Patent Office
Prior art keywords
electrolyser
tubular elements
telescopic tubular
differential expansion
electrolyte
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EP87402814A
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German (de)
French (fr)
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EP0273819B1 (en
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Guy Le Mitre
Frédéric Caby
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RECHERCHES TECHNIQUES ET INDUSTRIELLES SRTI Ste
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RECHERCHES TECHNIQUES ET INDUSTRIELLES SRTI Ste
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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
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type

Definitions

  • the present invention relates to an electrolyser provided with piping systems to compensate for differential expansions.
  • An electrolyser usually comprises several electrolysis cells filled with electrolyte, assembled against each other in a stack, inside a protective envelope and kept there permanently sealed by means of springs which tighten them elastically. These electrolysis cells are continuously supplied with electrolyte through supply inlet and outlet pipes and distribution pipes.
  • the chlorinator usually heats up when it is in operation. Under varying temperatures, the various parts of the electrolyser expand or contract. However, these constituent parts are often made with different materials and a difference in the amplitudes of expansion or contraction of these parts is usually recorded. This difference in amplitudes of expansion or contraction leads to stresses resulting in either a crushing or a stretching which can cause a crack or a rupture of these parts.
  • a known solution recommends for electrolyte inlet and outlet pipes supplying the cells of the electrolyser, a separation of these pipes in two or more sections, and the use of bellows to connect them and serve means of compensating for deviations in their expansion or contraction.
  • This solution turns out not only to be expensive in the application, but also difficult to implement in the event that these pipes pass through confined spaces, inaccessible to the electrolyser or offering insufficient spaces available for mounting such bellows.
  • the object of the present invention is to avoid these disadvantages, makes it possible to produce an economical electrolyser provided with pipe systems with effective compensation for expansion or differential contractions.
  • an electrolyzer having, in its electrolyte supply circuit for its electrolysis cells, electrolyte inlet and outlet pipes mounted through its protective casing, is characterized in that the internal pipes of electrolyte inlet and outlet are constituted respectively by duct systems with compensation for differential expansions of inlet and outlet, each comprising at least two telescopic liquid-tight tubular elements.
  • An electrolyser 1 produced according to the invention and illustrated partially and schematically in FIGS. 1 and 2, comprises several electrolysis cells 2 assembled one against the other in a stack, sliding along the tie-rods 3 inside a protective envelope 4, and permanently tightened in sealed contact at their edge, by springs 5.
  • the envelope 4 is closed in a sealed manner by a bottom 6 and a cover 7.
  • two contiguous cells are separated from each other by a metal wall called electrode 8, one of its faces constituting an anode and the opposite face forms a cathode.
  • the anode is connected to a positive terminal 9 and the cathode is connected to a negative terminal 10.
  • Each of the electrolysis cells 2 is separated by a diaphragm 12 into two compartments filled with a electrolyte constituted for example by an aqueous solution of potash.
  • the diaphragms 12 are framed or bordered by crowns 14 made of a more or less elastic material, resistant to heat, pressure and corrosion such as polysulfone.
  • the electrolysis cells 2 are continuously supplied, during the operation of the electrolyzer 1, with electrolyte via the electrolyte inlet pipes 15 and electrolyte outlet pipes 16, mounted according to the illustrated example, through the cover 7 of the casing 4.
  • the inlet 15 and outlet 16 electrolyte lines are extended through the rings 14 of the electrolysis cells 2 on the one hand by axial pipes 18 passing through the cell stack 2 and constituted by aligned holes formed in these assembled crowns 14, and on the other hand by radial conduits 19 for electrolyte distribution formed in the thickness of these crowns and individually placing the compartments of the cells 2 in communication with these axial pipes 18.
  • the electrolyser 1 heats up during its operation and tends to return to its initial temperature at each stop or interruption of operation.
  • a temperature variation in the electrolyser 1 causes its various parts to expand or contract. These parts are often made with various construction materials which each have their own coefficient of expansion or contraction. A difference or a deviation in the amplitudes of expansion or contraction of these parts of the electrolyzer 1 causes stresses which lead either to crushing or to stretching of these parts, which often causes a crack, a rupture, defects in leakage or electrolyte leakage.
  • the electrolyser having, in its electrolyte supply circuit for its electrolysis cells, electrolyte inlet and outlet pipes mounted through its protective envelope, comprises as internal pipes for electrolyte inlet and outlet systems differential expansion compensation pipes each comprising at least two telescopic tubular elements, liquid-tight in their sliding parts and in their fixing parts.
  • the first 21 of the two telescopic tubular elements is fixed to the cover 7 of the protective casing 4 and the second 22 of these telescopic tubular elements is mounted free through holes 32 of the internal parts of the electrolyser and 33 of its cover 7, and connected to the cell stack 2.
  • the systems for compensating for expansion or differential contractions of the electrolyte inlet 15 and outlet 16 have an identical structure and include telescopic tubular elements made of known construction materials, one of these telescopic elements being for example polytetrafluoroethylene. To simplify the description, only one of these systems, the electrolyte inlet pipe system 15, is described below.
  • the system for compensating for differential expansion of electrolyte inlet 15 comprises two telescopic tubular elements 21, 22.
  • the first telescopic tubular element 21 consists of a sleeve provided with a cylindrical bore 25, a fixing flange 26 at one of the ends, intended to receive screws 27 for fixing on the cover 7, and a connection end piece 28 at the other end, intended to receive one of the ends of a connecting pipe 23.
  • the second telescopic tubular element 22 consists of a pipe, one end of which is provided with a fixing base 30 allowing a solid fixation on the stack of cells 2, coaxially both with a pipe 18, and with the sleeve 21, and the other end 31 is cylindrical, free through holes 32, 33 of the internal parts of the electrolyser 1 and of its cover 7, and sliding in the cylindrical bore 25 of the sleeve 21.
  • the seal between the fixing flange 26 of the sleeve 21 and the cover 7 is ensured by a circular seal of seal 34.
  • the seal of the sliding parts telescopic tubular elements, that is to say that between the sleeve 21 and the sliding end 31 of the pipe 22 is accomplished by an adjusted sealing ring 35 and an elastic sealing seal 36.
  • a circular seal 38, mounted between the fixing base 30 of the pipe 22 and the end ring 14 of the cell stack 2, ensures the tightness of the connection between the system of electrolyte inlet pipes 15 and a corresponding axial pipe 18.
  • the sliding seal 36 is preferably that of a known type with U-shaped section reinforced by a spring.
  • the sliding seal 36 can be an O-ring.
  • the cell stack 2 increases its length faster than the casing 4 and its cover 7, and pushes the pipe 22 through the cover 7. Thanks to a sealed telescopic mounting between the pipe 22 and the sleeve 21 , the pipe 22 can then slide in the sleeve 21 without undergoing any crushing and without compromising the sealing of the system of electrolyte inlet pipes 15 provided by the adjusted ring 35 and the seal 36.
  • the pipe 22 can slide in the sleeve 21, avoid any crushing or stretching causing it to crack or break, and keep the seal of the electrolyte inlet pipe system 15.

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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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Fuel Cell (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
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Abstract

Electrolyser which has, in its circuit for feeding electrolyte to its electrolysis cells (2), electrolyte entry and exit conduits mounted through its protective enclosure, characterised in that the internal electrolyte entry and exit conduits consist, respectively, of conduit systems with compensation for differential entry (15) and exit (16) expansions, each comprising telescopic tubular members (21, 22) which are made liquidtight. <IMAGE>

Description

La présent invention concerne un électrolyseur muni de systèmes de conduites à compensation de dilatations différentielles.The present invention relates to an electrolyser provided with piping systems to compensate for differential expansions.

Un électrolyseur comprend habituellement plusieurs cellules d'électrolyse remplies d'électrolyte, assemblées les unes contre les autres en pile, à l'intérieur d'une enveloppe de protection et y maintenues en permanence étanches au moyen de ressorts qui les serrent élastiquement. Ces cellules d'électrolyse sont au cours de leur fonctionnement alimentées en continu en électrolyte à travers des conduites d'entrée et de sortie d'alimentation et des canali­sations de distribution. L'électrolyseur s'échauffe habituellement quand il est en fonctionnement. Sous une variation de températures, les diverses parties de l'électrolyseur se dilatent ou se contractent. Cependant ces parties consituantes sont souvent réalisées avec des matériaux différents et un écart dans les amplitudes de dilatation ou de contraction de ces parties est habituellement enregistré. Cet écart d'amplitudes de dilatation ou de contraction entraîne des contraintes entraînant soit un écrasement soit un étirement qui peut provoquer un fissure ou une rupture de ces parties.An electrolyser usually comprises several electrolysis cells filled with electrolyte, assembled against each other in a stack, inside a protective envelope and kept there permanently sealed by means of springs which tighten them elastically. These electrolysis cells are continuously supplied with electrolyte through supply inlet and outlet pipes and distribution pipes. The chlorinator usually heats up when it is in operation. Under varying temperatures, the various parts of the electrolyser expand or contract. However, these constituent parts are often made with different materials and a difference in the amplitudes of expansion or contraction of these parts is usually recorded. This difference in amplitudes of expansion or contraction leads to stresses resulting in either a crushing or a stretching which can cause a crack or a rupture of these parts.

Pour pallier ces inconvénients, une solution connue recom­mande pour des conduites d'entrée et de sortie d'électrolyte alimen­tant les cellules de l'électrolyseur, une séparation de ces conduites en deux ou plusieurs tronçons, et une utilisation de soufflets pour les relier et servire de moyens de compensation des écarts dans leurs dilatations ou contractions. Cette solution se révèle non seulement onéreuse dans l'application, mais également difficile à mettre en oeuvre au cas où ces conduites passent dans des endroits exigus, inacessibles de l'électrolyseur ou offrant d'insuffisants espaces disponibles pour le montage de tels soufflets.To overcome these drawbacks, a known solution recommends for electrolyte inlet and outlet pipes supplying the cells of the electrolyser, a separation of these pipes in two or more sections, and the use of bellows to connect them and serve means of compensating for deviations in their expansion or contraction. This solution turns out not only to be expensive in the application, but also difficult to implement in the event that these pipes pass through confined spaces, inaccessible to the electrolyser or offering insufficient spaces available for mounting such bellows.

La présente invention ayant pour but d'éviter ces désavan­tages, permet de réaliser un électrolyseur économique pourvu de systèmes de conduites à compensation efficace de dilatations ou de contractions différentielles.The object of the present invention is to avoid these disadvantages, makes it possible to produce an economical electrolyser provided with pipe systems with effective compensation for expansion or differential contractions.

Selon l'invention un électrolyseur ayant, dans son circuit d'ali­mentation en électrolyte de ses cellules d'électrolyse, des conduites d'entrée et de sortie d'électrolyte montées à travers son enveloppe de protection, est caractérisé en ce que les conduites internes d'entrée et de sortie d'électrolyte sont constituées respectivement par des systèmes de conduites à compensation de dilatations diffé­rentielles d'entrée et de sortie, comportant chacun au moins deux éléments tubulaires télescopiques étanches au liquide.According to the invention, an electrolyzer having, in its electrolyte supply circuit for its electrolysis cells, electrolyte inlet and outlet pipes mounted through its protective casing, is characterized in that the internal pipes of electrolyte inlet and outlet are constituted respectively by duct systems with compensation for differential expansions of inlet and outlet, each comprising at least two telescopic liquid-tight tubular elements.

Pour mieux faire comprendre l'invention, on en décrit ci-après un exemple de réalisation illustré par les dessins ci-annexés dont

  • - la figure 1 représente une vue partielle et schématique en coupe longitudinale d'un électrolyseur réalisé selon l'invention, et
  • - la figure 2 représente, à une autre échelle, une vue d'une partie de l'électrolyseur de la figure 1 montrant un système de conduites à compensation de dilatations ou de contractions différen­tielles pour alimenter an électrolyte des cellules de cet électro­lyseur.
To better understand the invention, there is described below an exemplary embodiment illustrated by the accompanying drawings,
  • FIG. 1 represents a partial and schematic view in longitudinal section of an electrolyser produced according to the invention, and
  • - Figure 2 shows, on another scale, a view of part of the electrolyser of Figure 1 showing a system of pipes to compensate for differential expansions or contractions for supplying electrolyte to the cells of this electrolyser.

Un électrolyseur 1 réalisé selon l'invention et illustré partiel­lement et schématiquement dans les figures 1 et 2, comprend plusieurs cellules d'électrolyse 2 assemblées les unes contre les autres en pile, coulissantes le long des tirante-guides 3 à l'intérieur d'une enveloppe de protection 4, et en permanence serrées en contact étanche au niveau de leur bordure, par des ressorts 5. L'enveloppe 4 est fermée d'une manière étanche par un fond 6 et un couvercle 7. Dans la pile de cellules 2, deux cellules contigües sont séparées l'une de l'autre par une paroi métallique appelée électrode 8 dont l'une de ses faces constitue un anode et la face opposée forme une cathode. Aux deux extrémités de l'électrolyseur 1, l'anode est connectée à une borne positive 9 et la cathode est branchée à une borne négative 10. Chacune des cellules d'électrolyse 2 est séparée par un diaphragme 12 en deux compartiments remplis d'un électrolyte constitué par exemple par une solution aqueuse de potasse. Les diaphragmes 12 son encadrés ou bordés par des couronnes 14 en une matière plus ou moins élastique, résistante à la chaleur, à la pression et à la corrosion telle que du polysulfone. Les cellules d'électrolyse 2 sont alimentées en continu, au cours du fonctionnement de l'électrolyseur 1, en électrolyte par l'intermé­diaire des conduites d'entrée d'électrolyte 15 et des conduites de sortie d'électrolyte 16, montées selon l'exemple illustré, à travers le couvercle 7 de l'enveloppe 4. Les conduites d'entrée 15 et de sortie 16 d'électrolyte sont prolongées à travers les couronnes 14 des cellules d'électrolyse 2 d'une part par des canalisations axiales 18 traversant la pile de cellules 2 et constituées par des trous alignés formés dans ces couronnes assemblées 14, et d'autre part par des conduits radiaux 19 de distribution d'électrolyte formés dans l'épais­seur de ces couronnes et mettant individuellement les compar­timents des cellules 2 en communication avec ces canalisations axiales 18. L'électrolyseur 1 s'échauffe au cours de son fonction­nement et tend à revenir à sa température initiale à chaque arrêt ou interruption de fonctionnement.An electrolyser 1 produced according to the invention and illustrated partially and schematically in FIGS. 1 and 2, comprises several electrolysis cells 2 assembled one against the other in a stack, sliding along the tie-rods 3 inside a protective envelope 4, and permanently tightened in sealed contact at their edge, by springs 5. The envelope 4 is closed in a sealed manner by a bottom 6 and a cover 7. In the cell stack 2 , two contiguous cells are separated from each other by a metal wall called electrode 8, one of its faces constituting an anode and the opposite face forms a cathode. At the two ends of the electrolyser 1, the anode is connected to a positive terminal 9 and the cathode is connected to a negative terminal 10. Each of the electrolysis cells 2 is separated by a diaphragm 12 into two compartments filled with a electrolyte constituted for example by an aqueous solution of potash. The diaphragms 12 are framed or bordered by crowns 14 made of a more or less elastic material, resistant to heat, pressure and corrosion such as polysulfone. The electrolysis cells 2 are continuously supplied, during the operation of the electrolyzer 1, with electrolyte via the electrolyte inlet pipes 15 and electrolyte outlet pipes 16, mounted according to the illustrated example, through the cover 7 of the casing 4. The inlet 15 and outlet 16 electrolyte lines are extended through the rings 14 of the electrolysis cells 2 on the one hand by axial pipes 18 passing through the cell stack 2 and constituted by aligned holes formed in these assembled crowns 14, and on the other hand by radial conduits 19 for electrolyte distribution formed in the thickness of these crowns and individually placing the compartments of the cells 2 in communication with these axial pipes 18. The electrolyser 1 heats up during its operation and tends to return to its initial temperature at each stop or interruption of operation.

Une variation de température dans l'électrolyseur 1 entraîne une dilatation ou une contraction de ses diverses parties. Ces parties sont souvent réalisées avec divers matériaux de construction qui ont chacun un coefficient de dilatation ou de contraction propre. Une différence ou un écart dans les amplitudes de dilatation ou de contraction de ces parties de l'électrolyseur 1 entraîne des con­traintes qui entraînent soit un écrasement, soit un étirement de ces parties, qui provoque souvent une fissure, une rupture, des défauts d'étanchéïté ou des fuites d'électrolyte.A temperature variation in the electrolyser 1 causes its various parts to expand or contract. These parts are often made with various construction materials which each have their own coefficient of expansion or contraction. A difference or a deviation in the amplitudes of expansion or contraction of these parts of the electrolyzer 1 causes stresses which lead either to crushing or to stretching of these parts, which often causes a crack, a rupture, defects in leakage or electrolyte leakage.

Parmi les parties de l'électrolyseur 1 les plus exposées à ces risques, se rangent les conduites d'entrée 15 et de sortie 16 d'électrolyte.Among the parts of the electrolyser 1 most exposed to these risks are the inlet 15 and outlet 16 electrolyte pipes.

Selon une caractéristique importante, l'électrolyseur ayant, dans son circuit d'alimentation en électrolyte de ses cellules d'élec­trolyse, des conduites d'entrée et de sortie d'électrolyte montées à travers son enveloppe de protection, comprend comme conduites internes d'entrée et de sortie d'électrolyte, des systèmes de conduites à compensation de dilatations différentielles comportant chacun au moins deux éléments tubulaires télescopiques, étanches au liquide dans leurs parties coulissantes et dans leurs parties de fixation.According to an important characteristic, the electrolyser having, in its electrolyte supply circuit for its electrolysis cells, electrolyte inlet and outlet pipes mounted through its protective envelope, comprises as internal pipes for electrolyte inlet and outlet systems differential expansion compensation pipes each comprising at least two telescopic tubular elements, liquid-tight in their sliding parts and in their fixing parts.

Selon une autre caractéristique, dans les systèmes de con­duites à compensation de dilatations différentielles d'entrée 15 ou de sortie 16 d'électrolyte, le premier 21 des deux éléments tubu­laires télescopiques est fixé sur le couvercle 7 de l'enveloppe du protection 4 et le deuxième 22 de ces éléments tubulaires télesco­piques est monté libre à travers des trous 32 des parties internes de l'électrolyseur et 33 de son couvercle 7, et connecté à la pile des cellules 2.According to another characteristic, in piping systems with compensation for differential expansions of electrolyte inlet 15 or outlet 16, the first 21 of the two telescopic tubular elements is fixed to the cover 7 of the protective casing 4 and the second 22 of these telescopic tubular elements is mounted free through holes 32 of the internal parts of the electrolyser and 33 of its cover 7, and connected to the cell stack 2.

Dans l'exemple illustré, les systèmes de conduites à compen­sation de dilatations ou de contractions différentielles d'entrée 15 et de sortie 16 d'électrolyte ont une structure identique et compren­nent des éléments tubulaires télescopiques constitués par des maté­riaux de construction connus, un des ces éléments téléscopiques étant par exemple en polytétrafluoroéthylène. Pour simplifier la description, un de ces systèmes, le système de conduites d'entrée d'électrolyte 15 est seul décrit ci-après.In the example illustrated, the systems for compensating for expansion or differential contractions of the electrolyte inlet 15 and outlet 16 have an identical structure and include telescopic tubular elements made of known construction materials, one of these telescopic elements being for example polytetrafluoroethylene. To simplify the description, only one of these systems, the electrolyte inlet pipe system 15, is described below.

Le système de conduites à compensation de dilatations diffé­rentielles d'entrée d'électrolyte 15 comprend deux éléments tubu­laires télescopiques 21,22.The system for compensating for differential expansion of electrolyte inlet 15 comprises two telescopic tubular elements 21, 22.

Le premier élément tubulaire télescopique 21 est constitué par un manchon muni d'un alésage cylindrique 25, d'une collerette de fixation 26 à l'une des extrémités, destinée à recevoir des vis 27 de fixation sur le couvercle 7, et d'un embout de connexion 28 à l'autre extrémité, destiné à recevoir un des bouts d'une canalisation de liaison 23. Le deuxième élément tubulaire télescopique 22 est constitué par un tuyau dont l'une des extrémités est pourvue d'une embase de fixation 30 permettant une solide fixation sur la pile des cellules 2, coaxialement à la fois avec une canalisation 18, et avec le manchon 21, et l'autre extrémité 31 est cylindrique, libre à travers des trous 32, 33 des parties internes de l'électrolyseur 1 et de son couvercle 7, et coulissante dans l'alésage cylindrique 25 du manchon 21. L'étanchéïté entre la collerette de fixation 26 du manchon 21 et le couvercle 7 est assurée par un joint circulaire d'étanchéïté 34. L'étanchéïté des parties coulissantes des éléments tubulaires télescopiques c'est-à-dire celle entre le manchon 21 et l'extrémité coulissante 31 du tuyau 22 est accomplie par une bague ajustée d'étanchéïté 35 et un joint élastique d'étanchéïté 36. Un joint circulaire 38, monté entre l'embase de fixation 30 du tuyau 22 et la couronne terminale 14 de la pile de cellule 2, assure l'étan­chéïté de la connexion entre le système de conduites d'entrée d'électrolyte 15 et une canalisation axiale 18 correspondante.The first telescopic tubular element 21 consists of a sleeve provided with a cylindrical bore 25, a fixing flange 26 at one of the ends, intended to receive screws 27 for fixing on the cover 7, and a connection end piece 28 at the other end, intended to receive one of the ends of a connecting pipe 23. The second telescopic tubular element 22 consists of a pipe, one end of which is provided with a fixing base 30 allowing a solid fixation on the stack of cells 2, coaxially both with a pipe 18, and with the sleeve 21, and the other end 31 is cylindrical, free through holes 32, 33 of the internal parts of the electrolyser 1 and of its cover 7, and sliding in the cylindrical bore 25 of the sleeve 21. The seal between the fixing flange 26 of the sleeve 21 and the cover 7 is ensured by a circular seal of seal 34. The seal of the sliding parts telescopic tubular elements, that is to say that between the sleeve 21 and the sliding end 31 of the pipe 22 is accomplished by an adjusted sealing ring 35 and an elastic sealing seal 36. A circular seal 38, mounted between the fixing base 30 of the pipe 22 and the end ring 14 of the cell stack 2, ensures the tightness of the connection between the system of electrolyte inlet pipes 15 and a corresponding axial pipe 18.

Le joint coulissant d'étanchéïté 36 est de préférence celui d'un type connu à section en U renforcé par un ressort. Le joint coulissant 36 peut être un joint torique.The sliding seal 36 is preferably that of a known type with U-shaped section reinforced by a spring. The sliding seal 36 can be an O-ring.

Lors d'une augmentation de température dans l'électrolyseur 1, si les couronnes 14 d'encadrement des diaphragmes 12 autrement dit la pile des cellules 2, ont un coefficient de dilatation plus grand que celui de l'enveloppe 4 et du couvercle 7 de l'électrolyseur 1, la pile de cellules 2 augmente sa longueur plus vite que l'enveloppe 4 et son couvercle 7, et enfonce le tuyau 22 à travers le couvercle 7. Grâce à un montage télescopique étanche entre le tuyau 22 et le manchon 21, le tuyau 22 peut alors coulisser dans le manchon 21 sans subir aucun écrasement et sans compromettre l'étanchéïté du système de conduites d'entrée d'électrolyte 15 assurée par la bague ajustée 35 et le joint 36.During an increase in temperature in the electrolyser 1, if the crowns 14 for framing the diaphragms 12, in other words the cell stack 2, have a coefficient of expansion greater than that of the casing 4 and the cover 7 of the electrolyser 1, the cell stack 2 increases its length faster than the casing 4 and its cover 7, and pushes the pipe 22 through the cover 7. Thanks to a sealed telescopic mounting between the pipe 22 and the sleeve 21 , the pipe 22 can then slide in the sleeve 21 without undergoing any crushing and without compromising the sealing of the system of electrolyte inlet pipes 15 provided by the adjusted ring 35 and the seal 36.

Au cours d'une baisse de température dans l'électrolyseur 1 ou d'un refroidissement de celui-ci, il se produit un phénomène inverse à celui décrit dans les paragraphes précédents à propos d'une augmentation de température. Grâce à un montage télescopique étanche, le tuyau 22 peut coulisser dans le manchon 21, éviter tout écrasement ou étirement provoquant sa fissure ou sa rupture, et conserver l'étanchéïté du système de conduites d'entrée d'électro­lyte 15.During a drop in temperature in the electrolyser 1 or cooling thereof, there occurs a phenomenon opposite to that described in the preceding paragraphs with regard to a rise in temperature. Thanks to a sealed telescopic mounting, the pipe 22 can slide in the sleeve 21, avoid any crushing or stretching causing it to crack or break, and keep the seal of the electrolyte inlet pipe system 15.

Les résultats ci-dessus sont également obtenus pour le système de conduties de sortie d'électrolyte 16 qui a une structure identique à celle du système de conduites d'entrée d'électrolyte 15. Bien que cette structure soit simple et facile à réaliser, elle est efficace dans le fonctionnement, et économique dans la fabrication.The above results are also obtained for the system of electrolyte outlet conduits 16 which has a structure identical to that of the system of electrolyte inlet conduits 15. Although this structure is simple and easy to produce, it is efficient in operation, and economical in manufacturing .

Claims (6)

1. Electrolyseur ayant, dans son circuit d'alimentation en électrolyte de ses cellules d'électrolyse (2), des conduites d'entrée et de sortie d'électrolyte montées à travers son enveloppe de protec­tion, caractérisé en ce que les conduites internes d'entrée et de sortie d'électrolyte sont constituées respectivement par des systèmes de conduites à compensation de dilatation différentielles d'entrée (15) et de sortie (16), comportant chacun au moins deux éléments tubulaires télescopiques étanches au liquide (21, 22).1. An electrolyser having, in its electrolyte supply circuit for its electrolysis cells (2), electrolyte inlet and outlet pipes mounted through its protective casing, characterized in that the internal pipes d electrolyte inlet and outlet consist respectively of differential expansion compensation inlet (15) and outlet (16) compensation duct systems, each comprising at least two liquid tight telescopic tubular elements (21, 22) . 2. Electrolyseur selon la revendication 1, caractérisé en ce que dans les systèmes de conduites à compensation de dilatations différentielles (15, 16), le premier des deux éléments tubulaires télescopiques (21) est fixé sur un couvercle (7) de l'enveloppe de protection (4) de l'électrolyseur, et le deuxième de ces deux éléments tubulaires télescopiques (22) est monté libre à travers des trous (32, 33) des parties internes de l'électrolyseur et de son couvercle (7), et connecté à la pile des cellules d'électolyse (2).2. Electrolyser according to claim 1, characterized in that in the differential expansion compensation pipe systems (15, 16), the first of the two telescopic tubular elements (21) is fixed on a cover (7) of the envelope protection (4) of the electrolyser, and the second of these two telescopic tubular elements (22) is mounted free through holes (32, 33) in the internal parts of the electrolyser and its cover (7), and connected to the battery of electolysis cells (2). 3. Electolyseur selon l'lune des revendications 1 et 2, carac­térisé en ce que dans les systèmes de conduites à compensation de dilatations différentielles, l'un des éléments tubulaires télescopiques (21, 22) est constitué par un matériau de construction tel que du polytétrafluoroéthylène.3. electrolyser according to one of claims 1 and 2, characterized in that in piping systems with differential expansion compensation, one of the telescopic tubular elements (21, 22) consists of a construction material such as polytetrafluoroethylene. 4. Electrolyseur selon l'une des revendications 1 à 3, caracté­risé en ce que dans les systèmes de conduites à compensation de dilatations différentielles, le premier des éléments tubulaires téles­copiques (21) est constitué par un manchon muni d'un alésage axial cylindrique (25), d'une collerette de fixation (26) par vis (27), à l'une des extrémités, et d'un embout de connexion (28) à l'autre extré­mité, et le deuxième de ces éléments tubulaires télescopiques (22) est constitué par un tuyau dont l'une des extrémités est pourvue d'une embase de fixation (30) et l'autre extrémité (31) est cylin­drique et coulissante dans l'alésage (25) de ce manchon (21).4. Electrolyser according to one of claims 1 to 3, characterized in that in the differential expansion compensation pipe systems, the first of the telescopic tubular elements (21) is constituted by a sleeve provided with a cylindrical axial bore ( 25), a fixing flange (26) by screw (27), at one end, and a connection end piece (28) at the other end, and the second of these telescopic tubular elements ( 22) consists of a pipe, one end of which is provided with a fixing base (30) and the other end (31) is cylindrical and sliding in the bore (25) of this sleeve (21). 5. Electrolyseur selon l'une des revendications 1 à 4, caracté­ risé en ce que les systèmes de conduites à compensation de dilatations différentielles comprennent dans leur partie coulissante télescopique, au moins un joint coulissant élastique d'étanchéïté (36).5. Electrolyser according to one of claims 1 to 4, character risé in that the differential expansion compensation pipe systems include in their telescopic sliding part, at least one elastic sliding sealing joint (36). 6. Electrolyseur selon la revendication 6, caractérisé en ce que les systèmes de conduites à compensation de dilatations différen­tielles comprennent des joints circulaires d'étanchéïté (34, 38) associés respectivement à la collarette de fixation (26) et à l'embase de fixation (30) des éléments tubulaires télescopiques (21, 22).6. An electrolyser according to claim 6, characterized in that the differential expansion compensation pipe systems comprise circular seals (34, 38) associated respectively with the fixing collar (26) and with the fixing base. (30) telescopic tubular elements (21, 22).
EP87402814A 1986-12-12 1987-12-11 Electrolysis cell fitted with a pipe system having a compensation for differential dilatations Expired - Lifetime EP0273819B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402814T ATE61636T1 (en) 1986-12-12 1987-12-11 ELECTROLYTIC CELL WITH LINE SYSTEMS THAT CONTAIN COMPENSATION OF DIFFERENT EXPANSIONS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617404A FR2608175B1 (en) 1986-12-12 1986-12-12 ELECTROLYSER PROVIDED WITH DIFFERENTIAL EXPANSION COMPENSATION SYSTEMS
FR8617404 1986-12-12

Publications (2)

Publication Number Publication Date
EP0273819A1 true EP0273819A1 (en) 1988-07-06
EP0273819B1 EP0273819B1 (en) 1991-03-13

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EP87402814A Expired - Lifetime EP0273819B1 (en) 1986-12-12 1987-12-11 Electrolysis cell fitted with a pipe system having a compensation for differential dilatations

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EP (1) EP0273819B1 (en)
AT (1) ATE61636T1 (en)
DE (1) DE3768631D1 (en)
FR (1) FR2608175B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410478A2 (en) * 1989-07-27 1991-01-30 De Nora Permelec S.P.A. Laminating press
WO1998004762A1 (en) * 1996-07-31 1998-02-05 United Technologies Corporation Center post electrochemical cell stack

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB599090A (en) * 1944-10-11 1948-03-04 Oerlikon Maschf Bipolar electrolyser
DE2821980A1 (en) * 1978-05-19 1979-11-22 Hooker Chemicals Plastics Corp ELECTROLYTE DISTRIBUTION DEVICE FOR ELECTROLYSIS CELLS ARRANGED IN A FILTER PRESS
EP0060746A1 (en) * 1981-02-24 1982-09-22 Creusot-Loire Electrolyser with temperature-stable structure
US4430390A (en) * 1982-09-23 1984-02-07 Engelhard Corporation Compact fuel cell stack

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB599090A (en) * 1944-10-11 1948-03-04 Oerlikon Maschf Bipolar electrolyser
DE2821980A1 (en) * 1978-05-19 1979-11-22 Hooker Chemicals Plastics Corp ELECTROLYTE DISTRIBUTION DEVICE FOR ELECTROLYSIS CELLS ARRANGED IN A FILTER PRESS
EP0060746A1 (en) * 1981-02-24 1982-09-22 Creusot-Loire Electrolyser with temperature-stable structure
US4430390A (en) * 1982-09-23 1984-02-07 Engelhard Corporation Compact fuel cell stack

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410478A2 (en) * 1989-07-27 1991-01-30 De Nora Permelec S.P.A. Laminating press
EP0410478A3 (en) * 1989-07-27 1991-11-13 De Nora Permelec S.P.A. Laminating press
WO1998004762A1 (en) * 1996-07-31 1998-02-05 United Technologies Corporation Center post electrochemical cell stack

Also Published As

Publication number Publication date
FR2608175B1 (en) 1989-02-17
ATE61636T1 (en) 1991-03-15
EP0273819B1 (en) 1991-03-13
FR2608175A1 (en) 1988-06-17
DE3768631D1 (en) 1991-04-18

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