FR2776370A1 - Hot water production tank - Google Patents
Hot water production tank Download PDFInfo
- Publication number
- FR2776370A1 FR2776370A1 FR9803460A FR9803460A FR2776370A1 FR 2776370 A1 FR2776370 A1 FR 2776370A1 FR 9803460 A FR9803460 A FR 9803460A FR 9803460 A FR9803460 A FR 9803460A FR 2776370 A1 FR2776370 A1 FR 2776370A1
- Authority
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- France
- Prior art keywords
- hot water
- tank
- producing hot
- water according
- anode
- 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.)
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 40
- 238000004519 manufacturing process Methods 0.000 title description 6
- 238000004210 cathodic protection Methods 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 229920002635 polyurethane Polymers 0.000 claims abstract description 4
- 239000004814 polyurethane Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 239000003973 paint Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 claims description 3
- 229910000457 iridium oxide Inorganic materials 0.000 claims description 3
- 229910001925 ruthenium oxide Inorganic materials 0.000 claims description 3
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 239000003518 caustics Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000004070 electrodeposition Methods 0.000 description 4
- 238000006056 electrooxidation reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000036039 immunity Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- -1 enamel Substances 0.000 description 1
- 238000004534 enameling Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/40—Arrangements for preventing corrosion
- F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
- F24H9/455—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means for water heaters
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/04—Controlling or regulating desired parameters
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/12—Electrodes characterised by the material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/181—Construction of the tank
- F24H1/183—Inner linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/40—Arrangements for preventing corrosion
- F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2201/00—Type of materials to be protected by cathodic protection
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
Description
DISPOSITIF DE PRODUCTION D'EAU CHAUDE COMPORTANTHOT WATER PRODUCTION DEVICE COMPRISING
UNE CUVE EQUIPEE DE MOYENS DE PROTECTION CATHODIQUE A TANK EQUIPPED WITH CATHODIC PROTECTION MEANS
A COURANT IMPOSEAT CURRENT TAX
L'invention vise un dispositif de production d'eau chaude comportant une cuve équipée de moyens de protection cathodique à courant imposé, c'està-dire dotés d'une anode non consommable et de moyens The invention relates to a device for producing hot water comprising a tank equipped with cathodic protection means with impressed current, that is to say provided with a non-consumable anode and means
d'alimentation électrique à courant imposé reliés auxdites anode et cuve. power supply with impressed current connected to said anode and tank.
Les moyens de protection cathodique sont d'une utilisation courante, à l'heure actuelle, afin d'assurer la protection des équipements de production d'eau chaude, en particulier les cuves réalisées en acier noir fonctionnant à des températures comprises entre la température ambiante et The cathodic protection means are in current use at present, in order to ensure the protection of the hot water production equipment, in particular the tanks made of black steel operating at temperatures between room temperature and
1 10 C et à des pressions comprises entre 0,5 bar et 30 bars. 1 10 C and at pressures between 0.5 bar and 30 bar.
Ces moyens de protection cathodique comprennent classiquement une anode non consommable et une alimentation stabilisée à régulation de tension automatique, reliée à ladite anode et à la cuve et adaptée pour maintenir ladite cuve à un potentiel négatif situant le métal dans sa zone d'immunité. De tels moyens de protection s'avèrent efficaces vis-à- vis des problèmes de corrosion chimique et électrochimique. Par contre, ils s'avèrent totalement inefficaces vis-à-vis des problèmes de corrosion par fragilisation caustique et conduisent même au contraire à une augmentation des risques d'un These cathodic protection means conventionally comprise a non-consumable anode and a stabilized power supply with automatic voltage regulation, connected to said anode and to the tank and adapted to maintain said tank at a negative potential locating the metal in its zone of immunity. Such protective means are effective against the problems of chemical and electrochemical corrosion. On the other hand, they prove to be totally ineffective with regard to the problems of corrosion by caustic embrittlement and, on the contrary, even lead to an increase in the risks of
tel type de corrosion.such type of corrosion.
En effet, la corrosion par fragilisation caustique résulte de l'action violente des alcalins et alcalino-terreux sur le fer en raison de l'alcalinité des eaux, qui donne lieu à la diffusion de ces éléments dans la structure cristalline du métal et à la formation de ferrates d'alcalins cause de fissures et d'explosion des équipements. L'exemple le plus courant est ainsi la formation de ferrates de sodium résultant de la diffusion de sodium en présence d'oxygène In fact, corrosion by caustic embrittlement results from the violent action of alkalines and alkaline earths on iron due to the alkalinity of the waters, which gives rise to the diffusion of these elements in the crystal structure of the metal and to the formation of alkali ferrates cause cracks and explosion of equipment. The most common example is the formation of sodium ferrates resulting from the diffusion of sodium in the presence of oxygen.
dissous.dissolved.
Or, même si ce type de corrosion est constaté en l'absence de moyens de protection cathodique, elle se trouve accélérée par de tels moyens de protection du fait que ces derniers conduisent à porter la cuve à un potentiel négatif et à rendre donc celle-ci plus attractive pour des alcalins chargés However, even if this type of corrosion is observed in the absence of cathodic protection means, it is accelerated by such protection means because the latter lead to bringing the tank to a negative potential and therefore making it more attractive for charged alkalis
positivement (Na+, Ca+...).positively (Na +, Ca + ...).
A l'heure actuelle, la seule solution utilisée pour lutter contre cette corrosion par fragilisation caustique et ainsi augmenter la durée de vie des cuves consiste à les revêtir intérieurement d'une couche de matériau tel que de l'émail, du verre ou du ciment. Toutefois, cette solution s'avère poser des problèmes notamment lors du transport et de la manutention des cuves en raison de la fragilité du revêtement intérieur, qui oblige dans la pratique à remplir ces o0 cuves d'eau en vue de préserver l'intégrité de ce revêtement et donc son efficacité ultérieure et conduisent à une augmentation considérable du poids desdites cuves et par conséquent à une augmentation notable des difficultés de leur manutention. L'opération de revêtement est parfois pratiquée sur le site mais At present, the only solution used to combat this corrosion by caustic embrittlement and thus increase the life of the tanks consists in coating them internally with a layer of material such as enamel, glass or cement. . However, this solution proves to pose problems in particular during the transport and the handling of the tanks because of the fragility of the internal coating, which in practice obliges to fill these tanks with water in order to preserve the integrity of this coating and therefore its subsequent effectiveness and lead to a considerable increase in the weight of said tanks and consequently to a significant increase in the difficulties of their handling. The coating operation is sometimes carried out on site but
exige alors l'intervention de spécialistes. requires the intervention of specialists.
La présente invention vise à pallier cet inconvénient et a pour principal objectif de fournir un dispositif de production d'eau chaude The present invention aims to overcome this drawback and has the main objective of providing a device for producing hot water.
protégé efficacement contre tous les types de corrosion (chimique, électro- effectively protected against all types of corrosion (chemical, electro-
chimique, et fragilité caustique) tout en pouvant être manutentionné à vide chemical, and caustic fragility) while being able to be handled empty
comme un dispositif classique actuel. like a current classic device.
Un autre objectif de l'invention est de fournir un dispositif de production d'eau chaude dont l'anode des moyens de protection cathodique Another object of the invention is to provide a device for producing hot water, the anode of the cathodic protection means
présente une taille notablement réduite par rapport aux anodes actuelles. has a significantly reduced size compared to current anodes.
Un autre objectif de l'invention est de fournir un dispositif de production d'eau chaude doté de moyens de contrôle et d'analyse en continu Another objective of the invention is to provide a device for producing hot water provided with means of continuous control and analysis.
du fonctionnement dudit dispositif.of the operation of said device.
A cet effet, l'invention vise un dispositif de production d'eau chaude comportant une cuve équipée de moyens de protection cathodique dotés d'une anode non consommable et de moyens d'alimentation électrique reliés auxdites anode et cuve. Selon l'invention, ce dispositif se caractérise en ce que la cuve est revêtue intérieurement d'une couche de revêtement composite graphite/liant. L'invention a donc consisté à combiner des moyens de To this end, the invention relates to a device for producing hot water comprising a tank equipped with cathodic protection means provided with a non-consumable anode and with electrical supply means connected to said anode and tank. According to the invention, this device is characterized in that the tank is internally coated with a layer of graphite / binder composite coating. The invention therefore consisted in combining means of
protection cathodique avec un revêtement spécifique de type composite graphite- cathodic protection with a specific graphite composite coating-
liant qui s'avèrent pallier de façon très efficace tous les problèmes de corrosion, binder which prove to be a very effective remedy for all corrosion problems,
fragilisation caustique, chimique, électrochimique. caustic, chemical, electrochemical embrittlement.
En effet, et en premier lieu, le revêtement composite s'avère constituer une surface de sites actifs conduisant à l'adsorption physique des alcalins et alcalino-terreux et à la formation d'une barrière entre ces éléments Indeed, and first of all, the composite coating turns out to constitute a surface of active sites leading to the physical adsorption of alkalis and alkaline-earths and to the formation of a barrier between these elements.
et la paroi interne de la cuve.and the inner wall of the tank.
De plus, ce revêtement composite s'avère attirer les métaux contenus dans l'eau qui viennent se fixer sur ce dernier par électrodéposition et In addition, this composite coating turns out to attract the metals contained in the water which come to be fixed on the latter by electrodeposition and
conduisent à la formation d'une couche dure qui protège la cuve de toute attaque. lead to the formation of a hard layer which protects the tank from any attack.
Or, outre la présence de la couche dure, il est à noter que cette électrodéposition permet d'éviter la formation de piles qui se créent lorsque la cuve n'a pas de However, in addition to the presence of the hard layer, it should be noted that this electrodeposition avoids the formation of batteries which are created when the tank has no
revêtement et qui conduit à une corrosion électrochimique. coating and which leads to electrochemical corrosion.
Enfin, concernant ce phénomène d'électrodéposition, il est à noter que la couche formée s'autorégénère, car lorsque cette dernière est saturée, des dépôts se créent dans le fond de la cuve et sont évacués lors des opérations de déborbage classiquement effectuées pour de tels dispositifs de Finally, concerning this phenomenon of electrodeposition, it should be noted that the layer formed self-regenerates, because when the latter is saturated, deposits are created in the bottom of the tank and are evacuated during deborbage removal operations conventionally carried out to such devices
production d'eau chaude.hot water production.
Comme indiqué ci-avant, les moyens de protection cathodique et le revêtement composite combinent donc leurs effets pour As indicated above, the cathodic protection means and the composite coating therefore combine their effects to
l'obtention d'une protection très efficace contre tous les types de corrosion. obtaining very effective protection against all types of corrosion.
Selon une autre caractéristique de l'invention, le liant consiste en une peinture de qualité alimentaire, et notamment de façon According to another characteristic of the invention, the binder consists of a food-grade paint, and in particular so
avantageuse en une peinture de polyuréthane. advantageous in polyurethane paint.
Le revêtement composite consiste quant à lui avantageusement en un liant dopé d'une poudre de graphite dont la composition The composite coating advantageously consists of a binder doped with a graphite powder, the composition of which
massique est comprise entre 5 % et 20 %. mass is between 5% and 20%.
Selon une autre caractéristique de l'invention, l'anode est revêtue d'un film de nuance oxydée, tel que préférentiellement un mélange en proportions égales d'oxyde de ruthénium et d'oxyde d'iridium, dont l'épaisseur est avantageusement sensiblement comprise entre 100 et 400 microns. De plus, According to another characteristic of the invention, the anode is coated with an oxidized shade film, such as preferably a mixture in equal proportions of ruthenium oxide and iridium oxide, the thickness of which is advantageously substantially between 100 and 400 microns. Moreover,
cette anode est préférentiellement réalisée en titane. this anode is preferably made of titanium.
L'ensemble de ces caractéristiques conduit à l'obtention d'une anode de faible prix de revient offrant une résistance chimique quelle que soit la nature de l'eau. De plus, une telle anode peut accepter une densité de courant maximale de 1000 A/m2 équivalant sensiblement au double de l'intensité acceptable par les anodes actuelles. De ce fait, à surface d'anode égale, elle All of these characteristics lead to the obtaining of a low cost anode offering chemical resistance whatever the nature of the water. In addition, such an anode can accept a maximum current density of 1000 A / m2 substantially equivalent to twice the intensity acceptable by current anodes. Therefore, with an equal anode surface, it
permet de protéger des cuves de plus grande quantité qu'une anode actuelle. protects larger tanks than a current anode.
Selon une autre caractéristique de l'invention, le dispositif l0 de production d'eau chaude comprend une électrode de référence solidaire de la cuve de façon à relever le potentiel de cette dernière, et des moyens de régulation des moyens d'alimentation électrique asservis à ladite électrode de référence de façon à imposer un courant adapté pour maintenir le potentiel de la cuve à une According to another characteristic of the invention, the device 10 for producing hot water comprises a reference electrode integral with the tank so as to take up the potential of the latter, and means for regulating the electrical supply means slaved to said reference electrode so as to impose a current adapted to maintain the potential of the tank at a
valeur sensiblement comprise entre -0,8 volts et -1 volts. value substantially between -0.8 volts and -1 volts.
Une telle alimentation stabilisée permet de maintenir le potentiel du métal de la cuve dans sa zone d'immunité selon la nature de l'eau, la valeur préférentielle du potentiel de la cuve à obtenir étant, en outre, Such a stabilized supply makes it possible to maintain the potential of the metal of the tank in its immunity zone according to the nature of the water, the preferential value of the potential of the tank to be obtained being, in addition,
classiquement, sensiblement égale à -1,2 volts. conventionally, substantially equal to -1.2 volts.
Selon une autre caractéristique de l'invention, le dispositif de production d'eau chaude comprend des moyens de mesure cyclique de données de fonctionnement telles que potentiel de la cuve, différence de potentiel entre cuve et anode, intensité du courant délivré, température de l'eau, et des According to another characteristic of the invention, the device for producing hot water comprises means for cyclic measurement of operating data such as potential of the tank, potential difference between tank and anode, intensity of the current delivered, temperature of l and water
moyens de mémorisation desdites mesures. means for memorizing said measurements.
Cet enregistrement de données spécifiques au fonctionnement de l'installation permet notamment le suivi du fonctionnement de la protection par relevé de la tension de la cuve, d'horodater les événements, de This recording of data specific to the operation of the installation makes it possible in particular to monitor the operation of the protection by reading the voltage of the tank, to time stamp events, to
déterminer les conditions d'exploitation... determine operating conditions ...
Ainsi, soumis à des analyses périodiques, facilitées préférentiellement en utilisant une carte à puce en tant que moyens de mémorisation, de tels enregistrements permettent de contrôler l'efficacité de la protection et d'optimiser les interventions sur le site afin de réduire les coûts de maintenance. D'autres caractéristiques, buts et avantages de la présente Thus, subject to periodic analyzes, preferably facilitated by using a smart card as storage means, such recordings make it possible to control the effectiveness of protection and to optimize interventions on the site in order to reduce the costs of maintenance. Other features, purposes and advantages of this
invention ressortiront de la description qui suit en référence aux dessins annexés invention will emerge from the following description with reference to the accompanying drawings
qui en représentent, à titre d'exemple non limitatif, un mode de réalisation which represent, by way of nonlimiting example, an embodiment
préférentiel. Sur ces dessins qui font partie intégrante de la présente description: preferential. On these drawings which form an integral part of this description:
s - la figure 1 est une vue schématique d'un ballon de production d'eau chaude conforme à l'invention sur laquelle ne sont pas représentés les organes de chauffage de l'eau, - et la figure 2 est un graphique d'une courbe de fonctionnement représentant un enregistrement de la valeur du potentiel de la s - Figure 1 is a schematic view of a hot water tank according to the invention in which the water heating members are not shown, - and Figure 2 is a graph of a operating curve representing a record of the value of the potential of the
1o cuve en fonction du temps.1o tank as a function of time.
Le dispositif de production d'eau chaude conforme à l'invention représenté à la figure 1 comprend classiquement une cuve 1 de forme générale cylindrique représentée de façon schématique à des fins de simplification, c'est-à-dire sans moyens de chauffage de l'eau ni raccords The hot water production device according to the invention shown in Figure 1 conventionally comprises a tank 1 of generally cylindrical shape shown schematically for simplification purposes, that is to say without heating means of the water or fittings
d'alimentation et de sortie d'eau qui peuvent être de tout connu en soi. supply and outlet water which can be of any known per se.
Cette cuve 1 réalisée par exemple en acier noir présente en premier lieu la particularité d'être revêtue intérieurement d'une couche 2 de revêtement composite consistant en une peinture polyuréthane dopée d'une This tank 1 made for example of black steel has in the first place the particularity of being coated internally with a layer 2 of composite coating consisting of a polyurethane paint doped with a
poudre de graphite dont la composition massique est comprise entre 5 % et 20 %. graphite powder whose mass composition is between 5% and 20%.
Un tel revêtement composite est préparé par simple mélange du liant et du graphite dans une cuve agitée, et mis en place par tout procédé classique tel que Such a composite coating is prepared by simple mixing of the binder and graphite in a stirred tank, and put in place by any conventional process such as
projection sur la paroi interne de la cuve 1. projection on the internal wall of the tank 1.
Ainsi appliqué, ce revêtement, d'une part, constitue une surface de sites actifs favorisant l'adsorption des alcalins et alcalino-terreux causes de la fragilité caustique et, d'autre part, conduit à la formation d'une pellicule dure sur la surface dudit revêtement par un effet d'électrodéposition des Thus applied, this coating, on the one hand, constitutes a surface of active sites favoring the adsorption of alkalis and alkaline-earths causing caustic brittleness and, on the other hand, leads to the formation of a hard film on the surface of said coating by an electrodeposition effect of
métaux contenus dans l'eau.metals contained in water.
Ce dispositif de production d'eau chaude comprend, en outre, des moyens de protection cathodique par courant imposé palliant les risques de corrosion chimique et électrochimique. Ces moyens de protection comprennent, en premier lieu, une anode non consommable 3 constituée d'une This device for producing hot water also comprises cathodic protection means by impressed current which mitigates the risks of chemical and electrochemical corrosion. These protection means comprise, first of all, a non-consumable anode 3 consisting of a
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barre longiligne, s'étendant dans la cuve 1 (axialement en l'exemple) et long bar, extending in the tank 1 (axially in the example) and
solidarisée en partie supérieure à la plaque 4 d'obturation de ladite cuve. secured in the upper part to the shutter plate 4 of said tank.
Cette anode 3 est réalisée en titane et est revêtue d'un film de quelques centaines de microns d'épaisseur, constitué d'un mélange en proportions égales d'oxyde de ruthénium et d'oxyde d'iridium déposé sur ladite This anode 3 is made of titanium and is coated with a film a few hundred microns thick, consisting of a mixture in equal proportions of ruthenium oxide and iridium oxide deposited on said
anode par tout procédé thermique classique tel que l'émaillage. anode by any conventional thermal process such as enameling.
Ces moyens de protection cathodique comprennent, en outre, une alimentation stabilisée 5 à régulation de tension automatique permettant de porter le potentiel de la cuve à une valeur négative présélectionnée These cathodic protection means further comprise a stabilized power supply 5 with automatic voltage regulation making it possible to bring the potential of the tank to a preselected negative value.
comprise entre -0,85 volts et -1,2 volts selon la nature de l'eau. between -0.85 volts and -1.2 volts depending on the nature of the water.
A cet effet, le pôle négatif de cette alimentation 5 est raccordé à l'anode 3, et le pôle positif est raccordé à la cuve 1, et cette alimentation 5 est asservie à une électrode de référence 6 en Calumel positionnée sur la cuve 1 de façon que sa tête de mesure soit disposée le plus près possible de For this purpose, the negative pole of this supply 5 is connected to the anode 3, and the positive pole is connected to the tank 1, and this supply 5 is controlled by a reference electrode 6 in Calumel positioned on the tank 1 of so that its measuring head is placed as close as possible to
l'interface face interne de la paroi de la cuve 1/solution liquide. the interface on the inside of the wall of the tank 1 / liquid solution.
Ce dispositif de production d'eau chaude comprend enfin une carte d'enregistrement 7 apte: - a collecter et maémoriser les données de fonctionnements délivrées par: 20. l'alimentation 5 à savoir potentiel de la cuve 1, potentiel entre anode 3 et cuve 1 fonction essentiellement du diamètre de cette cuve 1 et de la qualité de l'eau, intensité du courant délivré, un thermostat 8 de mesure de la température de l'eau This hot water production device finally comprises a recording card 7 suitable: - for collecting and memorizing the operating data delivered by: 20. the supply 5, namely potential of tank 1, potential between anode 3 and tank 1 essentially a function of the diameter of this tank 1 and of the quality of the water, intensity of the current delivered, a thermostat 8 for measuring the water temperature
dans la cuve 1.in tank 1.
- à établir un calendrier des événements (date et heure), comme tel que représenté à la figure, une courbe représentant l'évolution dans le temps du potentiel Ec de la cuve 1 sur laquelle apparaît: des périodes de fonctionnement normal o le potentiel Ec de la cuve 1 correspond au potentiel de consigne en l'exemple -1,2 volts, - to establish a calendar of events (date and time), as shown in the figure, a curve representing the evolution over time of the potential Ec of the tank 1 on which appears: periods of normal operation o the potential Ec of tank 1 corresponds to the setpoint potential in the example -1.2 volts,
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des périodes de fonctionnement anormal, en l'exemple au nombre de quatre, o le potentiel de la cuve 1 s'élève periods of abnormal operation, in the example of four in number, where the potential of tank 1 rises
temporairement au-dessus de la valeur de consigne. temporarily above the setpoint.
L'ensemble des données enregistrées par exemple sur une carte électronique à puces permet grâce à un examen périodique de ces données de vérifier l'état de la cuve 1, les conditions d'exploitation par l'utilisateur et d'optimiser l'entretien et la maintenance du dispositif All the data recorded for example on an electronic chip card makes it possible, thanks to a periodic examination of this data, to check the state of the tank 1, the operating conditions by the user and to optimize maintenance and device maintenance
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Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9803460A FR2776370B1 (en) | 1998-03-20 | 1998-03-20 | HOT WATER PRODUCTION DEVICE COMPRISING A TANK EQUIPPED WITH IMPOSED CURRENT CATHODE PROTECTION MEANS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9803460A FR2776370B1 (en) | 1998-03-20 | 1998-03-20 | HOT WATER PRODUCTION DEVICE COMPRISING A TANK EQUIPPED WITH IMPOSED CURRENT CATHODE PROTECTION MEANS |
Publications (2)
Publication Number | Publication Date |
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FR2776370A1 true FR2776370A1 (en) | 1999-09-24 |
FR2776370B1 FR2776370B1 (en) | 2000-05-26 |
Family
ID=9524296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9803460A Expired - Fee Related FR2776370B1 (en) | 1998-03-20 | 1998-03-20 | HOT WATER PRODUCTION DEVICE COMPRISING A TANK EQUIPPED WITH IMPOSED CURRENT CATHODE PROTECTION MEANS |
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Country | Link |
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FR (1) | FR2776370B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1666809A1 (en) * | 2004-11-17 | 2006-06-07 | Robert Bosch Gmbh | Protection device for a hot water storage tank |
EP3243932A4 (en) * | 2015-01-07 | 2018-01-31 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co. Ltd. | Method and device for preventing electrochemical corrosion of clothes care machine heater, steam generator, and clothes care machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4457821A (en) * | 1983-01-17 | 1984-07-03 | Pennwalt Corporation | Cathodic protection apparatus for well coated metal vessels having a gross bare area |
US5041242A (en) * | 1989-01-12 | 1991-08-20 | Cappar Limited | Conductive coating composition |
EP0520549A1 (en) * | 1991-06-25 | 1992-12-30 | ECOLINE ANTICORROSION S.r.l. | Inert anodes for the dissipation of continuous current |
US5176807A (en) * | 1989-02-28 | 1993-01-05 | The United States Of America As Represented By The Secretary Of The Army | Expandable coil cathodic protection anode |
EP0730046A1 (en) * | 1995-03-01 | 1996-09-04 | EKO d.o.o. | Electroconductive anticorrosive system |
-
1998
- 1998-03-20 FR FR9803460A patent/FR2776370B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4457821A (en) * | 1983-01-17 | 1984-07-03 | Pennwalt Corporation | Cathodic protection apparatus for well coated metal vessels having a gross bare area |
US5041242A (en) * | 1989-01-12 | 1991-08-20 | Cappar Limited | Conductive coating composition |
US5176807A (en) * | 1989-02-28 | 1993-01-05 | The United States Of America As Represented By The Secretary Of The Army | Expandable coil cathodic protection anode |
EP0520549A1 (en) * | 1991-06-25 | 1992-12-30 | ECOLINE ANTICORROSION S.r.l. | Inert anodes for the dissipation of continuous current |
EP0730046A1 (en) * | 1995-03-01 | 1996-09-04 | EKO d.o.o. | Electroconductive anticorrosive system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1666809A1 (en) * | 2004-11-17 | 2006-06-07 | Robert Bosch Gmbh | Protection device for a hot water storage tank |
EP3243932A4 (en) * | 2015-01-07 | 2018-01-31 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co. Ltd. | Method and device for preventing electrochemical corrosion of clothes care machine heater, steam generator, and clothes care machine |
Also Published As
Publication number | Publication date |
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FR2776370B1 (en) | 2000-05-26 |
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