DK169197B1 - Electrolysis system for corrosion protection of a fresh water pipe system - Google Patents
Electrolysis system for corrosion protection of a fresh water pipe system Download PDFInfo
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- DK169197B1 DK169197B1 DK064290A DK64290A DK169197B1 DK 169197 B1 DK169197 B1 DK 169197B1 DK 064290 A DK064290 A DK 064290A DK 64290 A DK64290 A DK 64290A DK 169197 B1 DK169197 B1 DK 169197B1
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- Prior art keywords
- container
- electrodes
- power source
- electrolysis system
- aluminum
- Prior art date
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- 238000005868 electrolysis reaction Methods 0.000 title claims description 28
- 230000007797 corrosion Effects 0.000 title claims description 12
- 238000005260 corrosion Methods 0.000 title claims description 12
- 239000013505 freshwater Substances 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 238000011010 flushing procedure Methods 0.000 claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 10
- 235000011941 Tilia x europaea Nutrition 0.000 description 10
- 239000004571 lime Substances 0.000 description 10
- 239000010802 sludge Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 4
- 238000004210 cathodic protection Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Prevention Of Electric Corrosion (AREA)
Description
i DK 169197 B1in DK 169197 B1
Opfindelsen angår et elektrolyseanlæg til korrosionsbeskyttelse af et ferskvandsrørsystem, som er forbundet med en vandbeholder, hvilket elektrolyseanlaeg har mindst to elektroder, som er anbragt i beholderen, samt en styreenhed med en strømkilde, 5 og at en af elektroderne er en anode af aluminium.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolysis system for corrosion protection of a fresh water piping system connected to a water container, said electrolytic system having at least two electrodes disposed in said container, and a control unit with a power source, and one of said electrodes being an anode of aluminum.
Fra DE-fremlæggelsesskrift nr. 2.445.903 kendes et elektrolyseanlæg til korrosionsbeskyttelse af et ferskvandsrørsystem med en tilhørende vandbeholder, hvilket elektrolyseanlæg har en katode, der udgøres af beholderen, og et system af opløse-10 lige anoder af aluminium og et system af inaktive anoder, idet alle anoder er anbragt i tanken og forbundet med en jævnstrømskilde. Ved driften af et sådant anlæg vil der normalt akkumuleres store mængder slam og kalk, der sidder som belægninger på vandbeholderens vægge og bund. Disse belægninger kan 15 give gode vækstbetingelser for bakterier, og der har i de kendte anlæg derfor vist sig problemer med tilstedeværelsen af for mange bakterier.DE Patent Specification No. 2,445,903 discloses an electrolysis system for corrosion protection of a freshwater piping system with an associated water container, which electrolysis system comprises a cathode made of the container and a system of soluble anodes of aluminum and a system of inactive anodes. , in that all anodes are placed in the tank and connected to a DC source. During the operation of such a plant, large amounts of sludge and lime will usually accumulate as coatings on the walls and bottom of the water tank. These coatings can provide good growth conditions for bacteria and, therefore, in the known plants there have been problems with the presence of too many bacteria.
Formålet med opfindelsen er at anvise et elektrolyseanlæg af den indledningsvis nævnte art, som i væsentlig grad forhin-20 dr er bakterier i at formere sig i anlægget, og som samtidig sikrer en korrosionsbeskyttelse af ferskvandsrørsystemet.The object of the invention is to provide an electrolysis plant of the kind mentioned above, which is substantially preventing bacteria from propagating in the plant, and which at the same time ensures a corrosion protection of the fresh water pipe system.
Elektrolyseanlægget ifølge opfindelsen er ejendommeligt ved, at elektroderne er opdelt i to grupper, hvor elektroden eller elektroderne i den ene gruppe er anoder af aluminium, og elek-25 troden eller elektroderne i den anden gruppe er katoder af aluminium, og at elektroderne i de to grupper er forbundet med strømkilden via en polomskifter, således at elektroderne i de to grupper skiftevis fungerer som anode og katode. Ved denne udformning kan elektroderne og vandet imellem disse betragtes 30 som en isoleret elektrolytisk celle, der er forbundet med en alternerende strømforsyning. Derved kan ved drift af elektrolyseanlægget kalkudfældningen begrænses til et bestemt areal, nemlig på den elektrode, som er katode i det pågældende tidsrum. Ved polaritetsskift ved hjælp af polomskifteren løsnes de 2 DK 169197 B1 på katoden dannede kalkafsætninger, som herefter bundfælder sig. De udslammes derefter. Herved opnås en væsentlig reduktion af den i beholderen tilstedeværende mængde slam og kalk sammenlignet med de kendte elektrolyseanlæg. Dette bevirker, 5 at bakterier får ringere vækstbetingelser med efterfølgende ^ lavere kimtal. Endvidere vil under elektrolyseanlæggets drift begge elektroder hver for sig i de tidsrum, hvor de er anoder, gradvis opløses, og det opløste aluminium danne aluminiumhydroxid. Dette aluminiumhydroxid har en gunstig indflydelse ved 10 sammen med udskilt calciumcarbonat at dække inderfladerne i ferskvandsrørsystemet med et korrosionshæmmende lag.The electrolytic system according to the invention is characterized in that the electrodes are divided into two groups, the electrode or electrodes in one group being anodes of aluminum and the electrode or electrodes in the other group being cathodes of aluminum and the electrodes in the two groups. groups are connected to the power source via a pole switch so that the electrodes in the two groups alternately act as anode and cathode. In this embodiment, the electrodes and the water therebetween may be considered as an isolated electrolytic cell connected to an alternating power supply. Thus, during the operation of the electrolysis system, the calcium precipitation can be limited to a certain area, namely on the electrode which is the cathode for that time. In the case of polarity shifts by means of the pole switch, the lime deposits formed on the cathode are loosened, which then settle. They are then extinguished. This results in a significant reduction in the amount of sludge and lime present in the container compared to the known electrolysis systems. This causes bacteria to have poorer growth conditions with subsequent ^ lower germ numbers. Furthermore, during the operation of the electrolysis system, both electrodes will gradually dissolve during the periods in which they are anodes, and the dissolved aluminum will form aluminum hydroxide. This aluminum hydroxide has a favorable influence by covering, together with secreted calcium carbonate, the inner surfaces of the freshwater pipe system with a corrosion-inhibiting layer.
Ifølge opfindelsen kan elektroderne i de to grupper være i hovedsagen ens. Herved opnås en enkel og billig udførelsesform for elektrolyseanlægget.According to the invention, the electrodes in the two groups can be substantially the same. This provides a simple and inexpensive embodiment of the electrolysis system.
15 Desuden kan der ifølge opfindelsen i beholderen yderligere være anbragt mindst én opløselig, ekstra anode, som er af aluminium eller zink, og som har en separat strømforsyning fra en ekstra strømkilde i styreenheden. Denne opløselige, ekstra anode vil give en katodisk beskyttelse mod korrosion af selve 20 beholderen.In addition, according to the invention, at least one soluble additional anode which is of aluminum or zinc and which has a separate power supply from an additional power source can be arranged in the control unit in the container. This soluble, extra anode will provide cathodic protection against corrosion of the container itself.
I elektrolyseanlægget kan styreenheden have mindst en første strømkilde, og ifølge opfindelsen kan elektroden eller elektroderne i den ene gruppe have en ekstra strømforsyning fra en ekstra strømkilde i styreenheden, idet en ledning fra den 25 ekstra strømkildes negative pol er forbundet med beholderen, og idet en ledning fra den ekstra strømkildes positive pol er forbundet med en ledning mellem den første strømkildes positive pol og den nævnte ene gruppe af elektroder i et forbindelsespunkt, som er beliggende på et sted mellem den første 30 strømkilde og polomskifteren. Herved opnås en katodisk beskyttelse mod korrosion af selve beholderen uden anvendelse af en ekstra anode, således at der opnås en særlig enkel udførelsesform for elektrolyseanlægget.In the electrolytic system, the control unit may have at least one first power source, and according to the invention, the electrode or electrodes in one group may have an additional power supply from an additional power source in the control unit, a wire from the negative pole of the additional power source being connected to the container, and a wire from the positive pole of the auxiliary power source is connected to a wire between the positive pole of the first power source and said one group of electrodes at a junction located at a location between the first power source and the pole switch. Hereby, a cathodic protection against corrosion of the container itself is obtained without the use of an additional anode, so that a particularly simple embodiment of the electrolysis system is obtained.
3 DK 169197 B13 DK 169197 B1
Yderligere kan ifølge opfindelsen beholderen være forsynet med en kegleformet, nedre endebund, i hvis nedre toppunkt er anbragt en udløbsventil. Herved opsamles ved hjælp af tyngdekraften en stor del af den udfældede kalk i endebundens kegle-5 toppunkt, dvs. lige over udløbsventilen, hvilket letter ud-slamningen.In addition, according to the invention, the container may be provided with a cone-shaped lower end bottom, in which a lower valve is provided with an outlet valve. Hereby, by the force of gravity, a large part of the precipitated lime is collected in the vertex cone vertex, ie. just above the outlet valve, which facilitates the sludge.
Endelig kan ifølge opfindelsen elektrolyseanlægget være således udformet, at beholderen i bunden har en nær ved beholderens svøb forløbende spulering, som er forsynet med et antal 10 spuledyser, og at der i beholderens nedre endebund er anbragt en udløbsventil. Herved opnås en hurtig udslamning af de ved polomskiftning fra elektroderne løsnede kalkbelægninger.Finally, according to the invention, the electrolytic system may be designed such that the container at the bottom has a flushing extending close to the container, which is provided with a plurality of 10 coil nozzles and that an outlet valve is arranged in the lower end bottom of the container. Hereby a rapid slurry of the lime coatings loosened by poles is obtained from the electrodes.
Opfindelsen forklares nedenfor under henvisning til tegningen, hvor 15 fig. 1 viser skematisk en første udførelsesform for et elektrolyseanlæg ifølge opfindelsen, idet der i beholderen er anbragt en opløselig, ekstra anode, fig. 2 i større målestok et lodret, centralt snit gennem beholderen i fig. l, 20 fig. 3 beholderen i fig. 2 set fra oven, idet beholderens øvre endebund er udeladt.The invention is explained below with reference to the drawing, in which FIG. 1 schematically shows a first embodiment of an electrolytic system according to the invention, in which a soluble auxiliary anode is placed in the container; FIG. 2 shows, on a larger scale, a vertical, central section through the container of FIG. 1, 20 FIG. 3 shows the container of FIG. 2, the upper end of the container being omitted.
fig. 4 skematisk en anden udførelsesform for et elektrolyseanlæg ifølge opfindelsen uden en ekstra anode i beholderen, fig. 5 i større målestok et lodret, centralt snit gennem be-25 holderen i fig. 4, fig. 6 beholderen i fig. 5 set fra oven, idet beholderens øvre endebund er tænkt fjernet, fig. 7 skematisk en modifikation af elektrolyseanlægget i fig.FIG. 4 schematically shows another embodiment of an electrolysis system according to the invention without an additional anode in the container; FIG. 5 shows, on a larger scale, a vertical, central section through the container of FIG. 4, FIG. 6 shows the container of FIG. 5 is a plan view of the upper end bottom of the container; 7 schematically shows a modification of the electrolysis system of FIG.
4 DK 169197 B1 4, idet beholderen er forsynet med en hvælvet, nedre endebund, fig. 8 i større målestok et lodret, centralt snit gennem beholderen i fig. 7 og fig. 9 beholderen i fig. 8 set fra oven, idet beholderens øvre 5 endebund er tænkt fjernet.4 DK 169197 B1 4, the container being provided with a vaulted lower end bottom, fig. 8 shows, on a larger scale, a vertical, central section through the container of FIG. 7 and FIG. 9 shows the container of FIG. 8 is a plan view of the upper end of the container being removed.
Det i fig. 1 viste elektrolyseanlæg er indrettet til korrosionsbeskyttelse af et ferskvandsrørsystem (ikke vist), som er forbundet med en vandbeholder 1. Elektrolyseanlægget består af mindst to elektroder 2 og 3 af aluminium, som er anbragt i 10 beholderen 1, samt en styreenhed 4 med en første strømkilde 24. Styreenheden 4 er indrettet til at nedtransformere og ensrette spændingen fra strømkilden 24 til en passende lav j ævnspænding.The FIG. 1 electrolysis system is provided for corrosion protection of a fresh water piping system (not shown) connected to a water container 1. The electrolysis system consists of at least two aluminum electrodes 2 and 3 which are arranged in the container 1, and a control unit 4 with a first power source 24. The control unit 4 is arranged to down-transform and rectify the voltage from the power source 24 to a suitably low DC voltage.
Elektroderne 2 og 3 er forbundet med strømkildens 24 positive 15 og negative pol via en polomskifter 5 således, at elektroderne 2 og 3 skiftevis fungerer som anode og katode. På et givet tids- punkt vil således elektroden 2 være anode og elektroden 3 være katode. Ved det efterfølgende polskift vil det omvendte være tilfældet, altså elektroden 2 være katode og elektroden 3 20 være anode. Ved et således udformet elektrolyseanlæg kan elektroderne 2 og 3 og vandet imellem disse betragtes som en isoleret elektrolytisk celle, der er forbundet med en alternerende strømforsyning. Derved kan under drift af elektrolyseanlægget kalkudfældningen begrænses til et bestemt areal, nemlig på 25 den elektrode, f.eks. 3, som er katode i det pågældende tidsrum. Når polomskifteren 5 derefter foretager polaritetsskift, løsnes de på katoden 3 dannede kalkafsætninger, som herefter bundfælder sig. De udslammes derefter gennem en udløbsventil 17 i beholderens bund. Herved opnås en væsentlig formindskelse 30 af den i beholderen tilstedeværende mængde slam og kalk sammenlignet med de kendte elektrolyseanlæg. Dette bevirker, at bakterier får ringere vækstbetingelser med efterfølgende lavere kimtal.The electrodes 2 and 3 are connected to the positive 15 and negative poles of the power source 24 via a pole switch 5 such that the electrodes 2 and 3 act alternately as anode and cathode. Thus, at a given time, electrode 2 will be anode and electrode 3 be cathode. On the subsequent pole shift, the reverse will be the case, that is, electrode 2 is cathode and electrode 3 is anode. In such an electrolysis system, electrodes 2 and 3 and the water therebetween can be considered as an isolated electrolytic cell connected to an alternating power supply. Thus, during the operation of the electrolysis system, the calcium precipitation can be limited to a certain area, namely on the electrode, e.g. 3, which is a cathode for the period in question. When the pole switch 5 then makes polarity shifts, the lime deposits formed on the cathode 3 are released, which then settle. They are then slurried through an outlet valve 17 in the bottom of the container. This results in a substantial reduction of the amount of sludge and lime present in the container compared to the known electrolysis systems. This causes bacteria to have poorer growth conditions with subsequent lower germ numbers.
5 DK 169197 B15 DK 169197 B1
Endvidere vil under elektrolyseanlæggets drift elektroderne 2 og 3, som er af aluminium, hver for sig i de tidsrum, hvor de er anoder, gradvis opløses, og det opløste aluminium danne aluminiumhydroxid. Dette aluminiumhydroxid har en gunstig ind-5 flydelse ved sammen med udskilt calciumcarbonat at dække in-derfladerne i ferskvandsrørsystemet med et korrosionshæmmende lag.Furthermore, during operation of the electrolysis system, the electrodes 2 and 3, which are of aluminum, will gradually dissolve during the periods in which they are anodes, and the dissolved aluminum will form aluminum hydroxide. This aluminum hydroxide has a favorable influence by, together with secreted calcium carbonate, covering the inner surfaces of the fresh water pipe system with a corrosion-inhibiting layer.
Fig. 2 og 3 viser beholderen 1 i fig. li større målestok og mere detaljeret. I denne udførelsesform er anvendt to i hoved-10 sagen ens, opløselige elektroder 2 og 3 af aluminium. Elektroderne 2 og 3 er stavformede, anbragt diametralt over for hinanden inden i beholderen (fig. 3) og fastgjort på passende måde til beholderen 1. Der kan imidlertid også anvendes flere elektroder, f.eks. fire. Disse skal så være opdelt i to grup-15 per, som har indbyrdes modsat polaritet.FIG. 2 and 3 show the container 1 in FIG. on a larger scale and in more detail. In this embodiment, two generally soluble electrodes 2 and 3 of aluminum are used in the main case. The electrodes 2 and 3 are rod-shaped, arranged diametrically opposite one another within the container (Fig. 3) and appropriately attached to the container 1. However, several electrodes, e.g. four. These must then be divided into two groups which have mutually opposite polarity.
Som det fremgår af fig. 1-3 er der i beholderen 1 yderligere anbragt mindst én, nemlig to opløselige, ekstra anoder 6 og 7, som er af aluminium eller zink, og som har en separat strømforsyning fra en ekstra strømkilde 25 i styreenheden 4. Ano-20 derne 6 og 7 er fastgjort til beholderen 1 på passende måde.As shown in FIG. 1-3, at least one is arranged in the container 1, namely two soluble, extra anodes 6 and 7, which are of aluminum or zinc, and which have a separate power supply from an additional power source 25 in the control unit 4. The anodes 6 and 7 are appropriately attached to the container 1.
Idet beholderen 1, som antages at være af stål eller andet metal, er forbundet med den ekstra strømkildes 25 negative pol og således tjener som katode, opnås at de ekstra anoder 6 og 7 vil give en katodisk beskyttelse mod korrosion af selve behol-25 deren 1.Since the container 1, which is assumed to be of steel or other metal, is connected to the negative pole of the additional current source and thus serves as a cathode, it is obtained that the extra anodes 6 and 7 will provide a cathodic protection against corrosion of the container itself. first
Beholderen 1 i fig. 2 og 3 er en varmtvandsbeholder, som forneden har et tilgangsrør 8 for koldt vand og foroven et afgangsrør 9 for varmt vand. Beholderen 1 har i sit øvre område et med en cirkulationspumpe 10 forsynet returrør 11 for varmt 30 vand, som kommer retur efter at have cirkuleret i cirkulationskredsløbet for varmt vand. Vandet i beholderen 1 opvarmes ved, at vand fra beholderen 1 løber ud gennem et udløbsrør 12, videre gennem en varmeveksler (ikke vist), hvor vandet opvarmes, og så tilbage til beholderen 1 gennem et indløbsrør 13.The container 1 of FIG. 2 and 3 is a hot water tank which has at the bottom an inlet pipe 8 for cold water and above it an outlet pipe 9 for hot water. In its upper area, the container 1 has a circulating pump 11 for hot 30 water, which is returned after circulating in the circulation circuit for hot water. The water in the container 1 is heated by running water from the container 1 through an outlet pipe 12, further through a heat exchanger (not shown) where the water is heated, and then back to the container 1 through an inlet pipe 13.
6 DK 169197 B16 DK 169197 B1
Som vist i fig. 1 og 2 har beholderen 1 foroven en øvre, hvælvet endebund 14, som er forsynet med en luftudlader 15 med vakuumafbryder. Forneden har beholderen 1 en nedre, kegleformet endebund 16, i hvis nedre toppunkt er anbragt en udløbs-5 ventil 17 eller slamhane. Herved opsamles ved hjælp af tyngdekraften en stor del af den udfældede kalk i endebundens 16 kegletoppunkt, dvs. lige over udløbsventilen 17, hvilket letter udslamningen.As shown in FIG. 1 and 2, the container 1 has at the top an upper, vaulted end bottom 14 which is provided with an air outlet 15 with a vacuum switch. Below, the container 1 has a lower cone-shaped end bottom 16, in which the lower apex is arranged an outlet valve 17 or mud cock. Hereby, by the force of gravity, a large part of the precipitated lime is collected in the cone peak point of the end floor 16, ie. just above the outlet valve 17, which facilitates slurry.
Som det fremgår af fig. 2 og 3 har beholderen 1 i bunden 16 en 10 nær ved beholderens svøb 18 forløbende spulering 19, som er forsynet med et antal spuledyser 20. Ved enden af tilgangsrøret 8 for koldt vand er parallelt indskudt en øvre tilgangsventil 21 og en nedre tilgangsventil 22. Den øvre tilgangsventil 21 munder ind i beholderen 1, mens den nedre tilgangsven-15 til 22 munder ind i spuleringen 19. Når udslamning af bundfældede kalkbelægninger og andet bundslam skal finde sted, lukkes for tilgangsventilen 21 og åbnes for tilgangsventilen 22. Koldt vand vil da blive ført ind i spuleringen 19, hvorfra vandet vil sprøjte skråt nedad mod endebunden 16 gennem spule-20 dyserne 20, som på forhånd er justeret i den nævnte retning. Endebunden 16 vil hurtigt blive spulet ren .for kalk og slam, som føres ud gennem udløbsventilen 17. En styreindretning 23 kan være indstillet til med visse mellemrum automatisk at lukke ventilen 21, åbne ventilen 22, stoppe cirkulationspumpen 25 10 og åbne udløbsventilen 17, således at spuling kan finde sted.As shown in FIG. 2 and 3, the container 1 at the bottom 16 has a flushing 19 extending close to the container 18 of the container 18, which is provided with a plurality of flushing nozzles 20. At the end of the cold water supply pipe 8, an upper inlet valve 21 and a lower inlet valve 22 are inserted in parallel. The upper inlet valve 21 mouths into the container 1, while the lower inlet valve 15 to 22 opens into the flushing 19. When slurry of precipitated lime coatings and other bottom sludge is to take place, the inlet valve 21 is closed and the inlet valve 22. Cold water will then be introduced into the washer 19, from which the water will spray obliquely downwardly toward the end floor 16 through the coil 20 nozzles 20 which are adjusted in advance in said direction. The end floor 16 will quickly be flushed clean of lime and sludge which is discharged through the outlet valve 17. A control device 23 may be set to automatically close the valve 21, open the valve 22, stop the circulation pump 25 10 and open the outlet valve 17, at certain intervals. that flushing can take place.
I fig. 4 er vist en anden udførelsesform for elektrolyseanlægget, hvor den ene elektrode 2 (eller 3) har en ekstra strømforsyning fra en ekstra strømkilde 25 i styreenheden 4, idet 30 en ledning fra den ekstra strømkildes negative pol er forbundet med beholderen, og idet en ledning fra den ekstra strømkildes 25 positive pol er forbundet med en ledning mellem den første strømkildes positive pol og den nævnte ene gruppe af elektroder i et forbindelsespunkt, som er beliggende på et 35 sted mellem' den første strømkilde og polomskifteren. Herved 7 DK 169197 B1 opnås en katodisk beskyttelse mod korrosion af selve beholderen 1 uden anvendelse af en ekstra anode - jf. anoden 6 i fig.In FIG. 4, another embodiment of the electrolysis system is shown, in which one electrode 2 (or 3) has an additional power supply from an additional power source 25 in the control unit 4, 30 a wire from the negative pole of the auxiliary power source being connected to the container and a wire from the positive pole of the auxiliary power source 25 is connected to a line between the positive pole of the first power source and said one group of electrodes at a junction located at a location between the first power source and the pole switch. Hereby, a cathodic protection against corrosion of the container 1 itself is obtained without the use of an additional anode - cf. the anode 6 in fig.
1 - således at der opnås en særlig enkel og billig udførelsesform for elektrolyseanlægget.1 so that a particularly simple and inexpensive embodiment of the electrolysis system is obtained.
5 Fig. 5 og 6 viser beholderen 1 i fig. 4 i større målestok og mere detaljeret. De to ekstra anoder 6 og 7 er udeladt, og dette giver mulighed for mange forskellige placeringer af elektroderne 2 og 3.FIG. 5 and 6 show the container 1 in FIG. 4 on a larger scale and in more detail. The two additional anodes 6 and 7 are omitted and this allows for many different locations of the electrodes 2 and 3.
Fig. 7 viser en modifikation af elektrolyseanlægget i fig. 4, 10 idet beholderen 1' er forsynet med en hvælvet, nedre endebund 16'.FIG. 7 shows a modification of the electrolysis system of FIG. 4, 10, the container 1 'being provided with a vaulted lower end base 16'.
Fig. 8 og 9 viser beholderen 1' i fig. 7 i større målestok og mere detaljeret. Ved at anvende en hvælvet endebund 16' i stedet for en kegleformet endebund, får beholderen 1' en mindre 15 højde og dermed en mere kompakt konstruktion.FIG. 8 and 9 show the container 1 'in FIG. 7 on a larger scale and in more detail. By using a vaulted end bottom 16 'instead of a cone-shaped end bottom, the container 1' gets a smaller height and thus a more compact construction.
Elektrolyseanlægget er ovenfor omtalt i forbindelse med en varmtvandsbeholder. Det kan imidlertid også anvendes til en koldtvandsbeholder.The electrolysis system is mentioned above in connection with a hot water tank. However, it can also be used for a cold water tank.
Elektroderne 2 og 3 og de ekstra anoder 6 og 7 kan have enhver 20 passende form og placering svarende til den givne anvendelse af elektrolyseanlægget.The electrodes 2 and 3 and the additional anodes 6 and 7 may have any suitable shape and location corresponding to the given use of the electrolysis system.
Man opnår en betydelig billiggørelse af anlægget, hvis man ikke anvender en spulering 19, jf. fig. 2,3; 5,6 og 8,9.Significant lowering of the system is achieved if no flushing 19 is used, cf. 2,3; 5.6 and 8.9.
Beholderen 1 er fortrinsvis af stål eller andet metal, men kan 25 også være af et andet materiale, f.eks. plast. Hvis beholderen er af metal, kan den på indersiden have et overfladelag af f.eks. plast, emalje eller maling.The container 1 is preferably of steel or other metal, but may also be of another material, e.g. plastic. If the container is of metal, it may have on the inside a surface layer of e.g. plastic, enamel or paint.
Claims (6)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK064290A DK169197B1 (en) | 1990-03-12 | 1990-03-12 | Electrolysis system for corrosion protection of a fresh water pipe system |
| DE4190516A DE4190516C2 (en) | 1990-03-12 | 1991-03-12 | Electrolytic device for protecting a fresh water piping system against corrosion |
| PCT/DK1991/000076 WO1991014018A1 (en) | 1990-03-12 | 1991-03-12 | Electrolytic apparatus for protection against corrosion of a freshwater piping system |
| DE4190516T DE4190516T1 (en) | 1990-03-12 | 1991-03-12 | Electrolytic device for protecting a fresh water piping system against corrosion |
| AU74695/91A AU7469591A (en) | 1990-03-12 | 1991-03-12 | Electrolytic apparatus for protection against corrosion of a freshwater piping system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK64290 | 1990-03-12 | ||
| DK064290A DK169197B1 (en) | 1990-03-12 | 1990-03-12 | Electrolysis system for corrosion protection of a fresh water pipe system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK64290D0 DK64290D0 (en) | 1990-03-12 |
| DK64290A DK64290A (en) | 1991-10-28 |
| DK169197B1 true DK169197B1 (en) | 1994-09-05 |
Family
ID=8095907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK064290A DK169197B1 (en) | 1990-03-12 | 1990-03-12 | Electrolysis system for corrosion protection of a fresh water pipe system |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU7469591A (en) |
| DE (2) | DE4190516C2 (en) |
| DK (1) | DK169197B1 (en) |
| WO (1) | WO1991014018A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ257307A (en) * | 1992-11-06 | 1997-10-24 | Mini Public Works | Waste water treatment: use of activated sludge containing phosphorus-removing bacteria |
| EP0722000B2 (en) * | 1995-01-13 | 2004-04-14 | Dansk Elektrolyse A/S | Apparatus for corrosion protection of a water system |
| DK5395A (en) * | 1995-01-17 | 1996-07-18 | Krueger Corrosion A S | Electrolysis system for corrosion protection of a utility water pipe system |
| US5750071A (en) * | 1995-06-08 | 1998-05-12 | Lucent Technologies Inc. | Corrosion protection employing alternating voltage |
| DE102006005415A1 (en) * | 2006-02-03 | 2007-08-16 | Perma-Trade Wassertechnik Gmbh | Water treatment facility |
| EP2226583A1 (en) * | 2009-03-02 | 2010-09-08 | Koninklijke Philips Electronics N.V. | Electrical water heating system |
| CN110304361B (en) * | 2018-03-27 | 2021-06-01 | 中国石油天然气股份有限公司 | liquid container |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661742A (en) * | 1970-06-22 | 1972-05-09 | Dow Chemical Co | Electrolytic method of marine fouling control |
| DK130019B (en) * | 1973-01-29 | 1974-12-09 | Guldager Electrolyse | Electrolytic water treatment plant. |
| SE380609B (en) * | 1974-04-05 | 1975-11-10 | Goteborgs Analyslaboratorium A | WAY TO ELIMINATE COATINGS ON WORKING ELECTRODES AND DEVICES FOR PERFORMING THE KIT BY ELECTRODAN DISTRIBUTORS |
| NL7904150A (en) * | 1979-05-25 | 1980-11-27 | Magneto Chemie Bv | METHOD FOR PERFORMING AN ELECTROLYSIS PROCESS, AND AN ELECTROLYSIS DEVICE SUITABLE FOR IT. |
| US4627900A (en) * | 1982-08-27 | 1986-12-09 | Amax Inc. | Electrochemical dissolution and control of nickel sulfide scale |
| EP0231100A3 (en) * | 1986-01-21 | 1989-07-12 | Wilfred Anthony Murrell | Water cleaning system |
-
1990
- 1990-03-12 DK DK064290A patent/DK169197B1/en not_active IP Right Cessation
-
1991
- 1991-03-12 AU AU74695/91A patent/AU7469591A/en not_active Abandoned
- 1991-03-12 DE DE4190516A patent/DE4190516C2/en not_active Expired - Fee Related
- 1991-03-12 DE DE4190516T patent/DE4190516T1/en active Pending
- 1991-03-12 WO PCT/DK1991/000076 patent/WO1991014018A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU7469591A (en) | 1991-10-10 |
| DK64290A (en) | 1991-10-28 |
| DE4190516C2 (en) | 1999-11-04 |
| WO1991014018A1 (en) | 1991-09-19 |
| DE4190516T1 (en) | 1997-07-24 |
| DK64290D0 (en) | 1990-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |