WO2006097277A1 - Procede de desinfection d'eau potable et dispositif de mise en oeuvre de ce procede - Google Patents

Procede de desinfection d'eau potable et dispositif de mise en oeuvre de ce procede Download PDF

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Publication number
WO2006097277A1
WO2006097277A1 PCT/EP2006/002327 EP2006002327W WO2006097277A1 WO 2006097277 A1 WO2006097277 A1 WO 2006097277A1 EP 2006002327 W EP2006002327 W EP 2006002327W WO 2006097277 A1 WO2006097277 A1 WO 2006097277A1
Authority
WO
WIPO (PCT)
Prior art keywords
drinking water
line
electrolysis
solution
nacl
Prior art date
Application number
PCT/EP2006/002327
Other languages
German (de)
English (en)
Inventor
Hennig Holger
Sandt Burkhard
Joachim Rennau
Original Assignee
Aqua Rotter Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aqua Rotter Gmbh filed Critical Aqua Rotter Gmbh
Publication of WO2006097277A1 publication Critical patent/WO2006097277A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/46125—Electrical variables
    • C02F2201/4613—Inversing polarity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/46145—Fluid flow
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4616—Power supply
    • C02F2201/4617—DC only
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/42—Liquid level

Definitions

  • the invention relates to a method according to the preamble of claim 1 and an apparatus for performing this method.
  • electrolytic disinfection takes place primarily in circulation or supply lines, as shown for example in DE 196 53 696 C2. Since the circulating water has only a certain content of chlorine compounds, a continuous electrolysis can only produce a concentration of "free chlorine” determined thereby.
  • the storage tank is sized so that it only has to be replenished at intervals of several weeks.
  • the concentration of the NaCl solution in the storage tank should be as high as possible, whereby it should be ensured that no crystallization problems occur. It should therefore be 70-90%, preferably about 80%.
  • the electrolysis cell is filled only to about 1/5 with NaCl solution from the reservoir and then filled with water from the drinking water pipe.
  • the filling of the electrolysis cell can also be such that first a portion of the drinking water, then the NaCl solution and finally drinking water are supplied to the maximum level.
  • a dosing pump controlled by the flow rate in the drinking water line between the dosing tank and the line ensures that a precisely dosed amount of the disinfectant solution is injected into the line as required.
  • An arranged between the metering pump and the drinking water line pressure-maintaining valve is set to a constant pressure, for example, 7 bar. The dosing pump thus always works against a constant pressure, regardless of pressure fluctuations in the drinking water line, so that the amount of the disinfectant solution injected is not influenced by pressure fluctuations in the line.
  • FIG. 1 shows a device for the electrolytic production of a disinfecting solution and their demand-metered addition to drinking water flowing through a branch line.
  • a contact water meter 2 is used, which emits a pulse to an electronic control device 3 after each certain amount of water flowing therethrough. The water flows through the drinking water pipe 1 in the direction indicated by the arrow.
  • a storage container 4 serves to receive a highly concentrated NaCl solution, which, in order to avoid crystallization, should not exceed a concentration of about 80%.
  • Fill level sensors report to the control device 3 when a minimum fill level has been undershot or a maximum fill level has been exceeded.
  • a DC electrolysis cell 5 is connected to the reservoir 4 by a pump 6 containing line 7.
  • the electrolytic cell 5 is connected by a line 8 with a metering 9.
  • An inserted into the line 8 solenoid valve 10 is controlled by the control device 3.
  • the electrolysis cell 5 is connected by a line 11 to the drinking water line 1.
  • An inserted into the line 11 pressure reducer 12 sets the pressure in the line 11 on the side facing away from the drinking water pipe 1 side down to about 0.5 bar down.
  • a solenoid valve 13 controlled by the control device 3 opens or closes the line 11 for the supply of drinking water to the electrolytic cell 5.
  • the electrolytic cell '5 and the metering 9 also contain level sensors for detecting a respective minimum level and a maximum level falling below the minimum level and exceeding the limit maximum level each of the control device 3 are reported.
  • the metering 9 is connected via a line 14 to the drinking water line 1.
  • a metering pump 15 controlled by the control device 3 as a function of the quantity of water flowing through the contact water meter 2 and a pressure retaining valve 16 which generates a constant pressure on the side facing away from the drinking water line 1 against which the metering pump 15 must operate. used. This ensures that, regardless of pressure fluctuations in the drinking water pipe 1 at each pump stroke, a defined amount of the disinfecting solution is discharged into the drinking water pipe 1.
  • the electrolysis cell 5 Since the electrolysis cell 5 is empty, report its level sensors of the control device 3, that the minimum level is below. This causes the opening of the solenoid valve 13, so that drinking water flows into the electrolysis cell 5. If a certain level is indicated by a lower level sensor, the solenoid valve 13 is closed again. The control device 3 then causes the switching on of the pump 6 for a fixed duration, whereby a certain amount of the NaCl solution is removed from the storage container. ter 4 is conveyed into the electrolytic cell 5. Subsequently, the control device 3 again opens the solenoid valve 13, so that again drinking water flows into the electrolytic cell 5 until the level sensors indicate that the maximum level has been reached. The incoming water causes a homogeneous mixing of the WaCl solution, which now has a concentration of about 20%.
  • the electrolysis process After closing the solenoid valve 13 begins, although in the metering 9, the undershooting of a minimum level is displayed, the electrolysis process.
  • the NaCl is converted into disinfecting substances using the same term "free chlorine" and consisting primarily of HOCl. Gases produced during the electrolysis are removed via a line 17. The duration of the electrolysis process is fixed. When finished, the resulting disinfectant solution has a free chlorine content of about 1 g / l.
  • the solenoid valve 10 is opened for a certain duration. After its expiry, the disinfection solution from the electrolytic cell 5 has flowed through the gradient of the line 8 into the metering container 9, as the control device 3 is indicated by the corresponding level sensors. Subsequently, the filling of the electrolysis cell 5 in the manner described above takes place again.
  • the disinfection of the drinking water can begin now. Whenever water is taken from the tap water line 1 at the tapping points, the contact water meter 2 sends a number of pulses proportional to the amount of water taken to the control device 3 and controls the metering pump 15 such that it executes a corresponding number of pumping strokes. The injected into the drinking water line 1 amount of disinfecting solution is thus proportional to the amount of water removed.
  • the ratio of the number of pulses of the contact water meter 2 to the number of pump strokes of the metering pump 15 in the control device 3 it can be determined how high the concentration of free chlorine at the injection point in the drinking water pipe 1 should be.
  • This can be set, for example, to 0.4 mg / l, if it is ensured that it is degraded to below the first tap to below 0.3 mg / 1 and thus complies with the Drinking Water Ordinance. If a so-called shock disinfection is to be carried out, the aforementioned ratio can also be temporarily changed so that the content of free chlorine at the injection site is increased, for example, 2 to 3 times.
  • the control device 3 triggers the electrolysis process.
  • the specific value is selected so that there is still sufficient disinfectant solution in the dosing container 9 to disinfect water taken from the drinking water line 1 until the next batch of disinfectant solution, about 1/2 to 1 hour, is required for this purpose.
  • the operator is notified that refilling is required.
  • the minimum time interval between replenishments should be several weeks. If no replenishment occurs after a certain number of additional batches has been dispensed, the total te device off.
  • the signals of the various level sensors are also used by the control device 3 for the detection of possible errors and for their display and optionally for switching off the entire device.
  • the electrodes of the electrolytic cell 5 operated with direct current are reversed after each charge, whereby calcification on these is prevented.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne un procédé de désinfection d'eau potable guidée au travers d'une conduite (1) par addition d'une solution de désinfection aqueuse contenant du chlore libre, consistant à se munir d'une solution de chlorure de sodium aqueuse dans un réservoir (4) ; à introduire de façon discontinue une quantité définie de la solution de NaCl dans une cellule d'électrolyse (5) en fonction de la quantité d'eau potable guidée au travers de la conduite (1) ; à électrolyser la solution de NaCl introduite dans la cellule d'électrolyse (5) ; à réaliser l'électrolyse jusqu'à ce que le NaCl soit au moins partiellement transformé en chlore libre ; à introduire la solution de désinfection contenue dans la cellule d'électrolyse (5) dans un contenant de dosage (9) à la fin de l'électrolyse ; et à injecter la solution de désinfection, du contenant de dosage vers la conduite (1), en fonction de la quantité d'eau potable guidée au travers de la conduite (1).
PCT/EP2006/002327 2005-03-14 2006-03-14 Procede de desinfection d'eau potable et dispositif de mise en oeuvre de ce procede WO2006097277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005012907.2 2005-03-14
DE200510012907 DE102005012907A1 (de) 2005-03-14 2005-03-14 Verfahren zur Desinfektion von Trinkwasser und Vorrichtung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
WO2006097277A1 true WO2006097277A1 (fr) 2006-09-21

Family

ID=36586091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/002327 WO2006097277A1 (fr) 2005-03-14 2006-03-14 Procede de desinfection d'eau potable et dispositif de mise en oeuvre de ce procede

Country Status (2)

Country Link
DE (1) DE102005012907A1 (fr)
WO (1) WO2006097277A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010020270A1 (fr) * 2008-08-22 2010-02-25 Yuan Gao Procédé pour désinfecter de l'eau
US20130264291A1 (en) * 2010-07-22 2013-10-10 David Itzhak Method and apparatus for treating drinking water
CH703545B1 (de) * 2010-10-04 2012-02-15 Rene Meier Verfahren zur Herstellung von elektroaktiviertem Wasser.
AT524772B1 (de) * 2021-05-21 2022-09-15 Olymp Werk Gmbh Zusatzvorrichtung für Temperiersystem und Temperiersystem mit Desinfektionseinheit
EP4249441A1 (fr) * 2022-03-20 2023-09-27 Donato Patrissi Générateur d'eau potable en canalisation ayant une dépendance minimale sur l'infrastructure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274094A (en) * 1965-02-24 1966-09-20 Chemagnetics Controls Inc Apparatus for the chlorination of water
US4118307A (en) * 1977-02-14 1978-10-03 Diamond Shamrock Corporation Batch sodium hypochlorite generator
US5958229A (en) * 1997-04-02 1999-09-28 The United States Of America As Represented By The Secretary Of The Navy Electrolytic disinfectant system
US20040149663A1 (en) * 2001-04-27 2004-08-05 Minoru Nakanishi Water treating device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653696C2 (de) * 1996-12-16 2000-09-07 Butzke Werke Aqua Verfahren zum Desinfizieren von Wasser
FR2803841B1 (fr) * 2000-01-18 2002-02-22 Inst Francais Du Petrole Dispositif et procede de desinfection et de lutte contre la legionellose dans des equipements de distribution d'eau chaude sanitaire
WO2003010094A1 (fr) * 2001-07-26 2003-02-06 H20 Technologies, Ltd. Appareil et procedes de nettoyage et de lutte contre le developpement de bacteries dans des conduites d'alimentation en liquide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274094A (en) * 1965-02-24 1966-09-20 Chemagnetics Controls Inc Apparatus for the chlorination of water
US4118307A (en) * 1977-02-14 1978-10-03 Diamond Shamrock Corporation Batch sodium hypochlorite generator
US5958229A (en) * 1997-04-02 1999-09-28 The United States Of America As Represented By The Secretary Of The Navy Electrolytic disinfectant system
US20040149663A1 (en) * 2001-04-27 2004-08-05 Minoru Nakanishi Water treating device

Also Published As

Publication number Publication date
DE102005012907A1 (de) 2006-09-21

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