WO2014114291A2 - Dispositif et procédé destinés à préparer une solution d'hypochlorure de sodium ayant un potentiel d'oxydoréduction supérieur à 800 mv et notamment un ph supérieur à 8 - Google Patents

Dispositif et procédé destinés à préparer une solution d'hypochlorure de sodium ayant un potentiel d'oxydoréduction supérieur à 800 mv et notamment un ph supérieur à 8 Download PDF

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Publication number
WO2014114291A2
WO2014114291A2 PCT/DE2014/100022 DE2014100022W WO2014114291A2 WO 2014114291 A2 WO2014114291 A2 WO 2014114291A2 DE 2014100022 W DE2014100022 W DE 2014100022W WO 2014114291 A2 WO2014114291 A2 WO 2014114291A2
Authority
WO
WIPO (PCT)
Prior art keywords
anode
solution
cathode
chamber
space
Prior art date
Application number
PCT/DE2014/100022
Other languages
German (de)
English (en)
Other versions
WO2014114291A3 (fr
Inventor
Jörg HEIL
Original Assignee
Waterclean 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 Waterclean Gmbh filed Critical Waterclean Gmbh
Publication of WO2014114291A2 publication Critical patent/WO2014114291A2/fr
Publication of WO2014114291A3 publication Critical patent/WO2014114291A3/fr

Links

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
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/24—Halogens or compounds thereof
    • C25B1/26—Chlorine; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C—CHEMISTRY; METALLURGY
    • 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
    • C02F2201/46115—Electrolytic cell with membranes or diaphragms
    • 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
    • C02F2209/04—Oxidation reduction potential [ORP]

Definitions

  • the invention relates to a device for producing a sodium hypochlorite solution having a redox value of more than 800 mV and in particular a pH greater than 8, with a chamber cell electrolysis cell having a separation chamber which is divided by a flat membrane into a cathode space and an anode space, wherein the separation chamber is flowed through on both sides of the membrane along this, wherein in the cathode space a cathode is provided, which is arranged at a preselected distance from the membrane, wherein the cathode space a cathode space solution inflow for a Ka ⁇ method space solution and a cathode space solution Abpound for a catholyte, and wherein in the anode space, an anode is provided, which at a preselected distance to
  • Membrane is arranged, wherein the anode space has an anode space dissolution inlet for anode space solution and an anode space dissolution outlet for anolyte.
  • fecal impurities are usually present in the form of aggregates or embedded in particles that may contain the pathogens in large quantities.
  • the pathogens from the effects of the disinfecting agent, even at high concentrations, ge ⁇ protects.
  • a mechanical removal of the particles or aggregates by a previous Aufbe ⁇ preparation of the water is necessary.
  • the treatment should also ensure sufficient elimination of parasitic pathogens such as Cryptosporidium and Giardia.
  • the chemicals used for the chlorination of drinking water are supplied either as commercial products (chlorine gas, Nat ⁇ rium- and calcium hypochlorite), or on site by electrolysis (chlorine gas, chlorine solution, hypochlorite solution).
  • chlorine gas chlorine solution, hypochlorite solution
  • electrolysis chlorine gas, chlorine solution, hypochlorite solution
  • the object of the invention is to provide an apparatus for producing a sodium hypochlorite solution having a redox value of more than 800 mV, and to a method for producing such an electrochemically activated sodium hypochlorite solution.
  • a device for producing a sodium hypochlorite solution having a redox value of more than 800 mV with a chamber cell electrolysis cell with a separation chamber which is divided by a flat membrane formed in a cathode space and an anode space, wherein the separation chamber flows through the membrane along both sides is provided, wherein in the cathode space, a cathode is provided which is arranged at a preselected distance from the membrane, wherein the cathode space is a cathode space Having solution inflow for a cathode space solution and a catholyte space drain for a catholyte,
  • the anode space having an anode space dissolution inlet for anode space solution and an anode space dissolution outlet for anolyte, which is characterized in that the anode space dissolution inflow a sodium chlorite Water solution (saline solution) can be fed, which can flow through the anode compartment and as anolyte, the anode compartment at the Anodenraum- solution outflow is removable, and that an anolyte line is provided, by which the anolyte from the anode space solution outflow the cathode space at the cathode compartment Solution inlet can be supplied and this can flow through parallel to the anode compartment, and that the sodium hypochlorite solution at the cathode space-solution effluent is removed as a catholyte.
  • a sodium chlorite Water solution saline solution
  • a mixer is provided, by means of which the salt concentration of the sodium-chlorite-water solution
  • the sodium chlorite-water solution preferably has a sodium chloride content mass fraction of 0.005 to 0.02 (concentration of 0.5 to 2%).
  • a control device which generates a voltage that is applied between the anode and the cathode, and that the control device, the Lö- tion flow rate through the cell chamber electrolysis cell by means of the mixer in response to a signal measured by a sensor current between the anode and cathode lent signal so that the catholyte with a redox value of 800 to 1100 mV, preferably 950 mV is adjustable.
  • An equally advantageous embodiment provides that a control device is provided which generates a voltage applied between the anode and cathode, and that the control device can control the flow rate through the chamber cells electrolytic cell in particular by means of the Mi ⁇ exchanger so that the catholyte pH Value of 8.5 to 10.5, preferably 9.5 is adjustable.
  • a likewise no less advantageous embodiment provides a control device which generates a biasing voltage applied between the anode and cathode, and that the control device can control the flow rate through the chamber cells electrolytic cell in particular by means of the Mi ⁇ exchanger so that the catholyte with chlorine content from 100 to 1500 mg / ml is adjustable.
  • a control device which, depending on the values of the catholyte measured by a sensor, adjusts the salt concentration of the anode space solution by means of a mixer of water and concentrated salt solution.
  • control device controls the current between the anode and the cathode in dependence adjust the values of the catholyte measured by a sensor.
  • a control device can also combine all the above-mentioned properties.
  • the voltage between the anode and the cathode between 8 to 12 volts, preferably 10 volts is selected.
  • the chamber cell electrolysis cell is formed by a diaphragm cell with diaphragm membrane as a membrane gebil ⁇ det.
  • the cathode and / or the anode are advantageously formed flat from ⁇ and arranged parallel to the membrane. Further advantageous is the preselected distance of the cathode and / or the anode in each case to the membrane 2 to 3 mm and it is between these see a spacer is provided in the form of a grid.
  • the grid may advantageously be a plastic mesh mat.
  • an advantageous development of the invention provides that the surface of the anode and / or cathode ter Fashion a Rautengit- or diamond-shaped upstanding structures up has / s, wherein the diamond lattice is aligned with the direction of flow, in particular so that this oriented transversely to the flow Rich ⁇ tung is.
  • the membrane consists of a Teflon membrane.
  • a method is proposed for producing an electrochemically activated sodium hypochlorite solution as the catholyte of a device according to one of claims 1 to 13, comprising the steps:
  • Another advantageous method step provides that adjust the concentration of the saline solution of a saturated salt solution and water depending on the voltage applied to the anode and the cathode voltage adjust the current and mixed, whereby a pre-specified current is adjusted.
  • a surface disinfectant is proposed, which is a sodium hypochlorite solution prepared by a process according to any one of claims 14 to 15.
  • a drinking water disinfectant which is prepared by a process of claims 14 to 15, can be used according to a wei ⁇ cal aspect of the invention for drinking water disinfection such that germ-contaminated drinking water, the drinking water disinfectant in a concentration of 1: 100 to 1 : 1000 is supplied.
  • a wastewater disinfecting agent which is prepared by a method according to any one of claims 14 to 15.
  • a method for wastewater sterilization suggests that germ-contaminated drinking water, such a wastewater disinfecting agent is supplied in a concentration of 1:20 to 1: 100.
  • Pesticide-contaminated or hormone-contaminated water provides that an electro ⁇ chemically activated sodium hypochlorite solution prepared according to claim 13 is added thereto. It is further proposed for the treatment of hormone-contaminated water, that this is added to one of claims 14 to 15 prepared electrochemically activated sodium hypochlorite solution. Also, a method of treating hormone-contaminated water is suggested.
  • FIG. 1 is a diagrammatic cross-sectional view of a device according to the invention for producing a sodium hypochlorite solution
  • FIG. 2 shows the diaphragm cell of FIG. 1 with a schematically illustrated flow pattern of the fluid
  • the diaphragm cell of FIG. 1 with schematically represented ion passage through the diaphragm diaphragm
  • FIG. 1 is a diagrammatic cross-sectional view of a device according to the invention for producing a sodium hypochlorite solution
  • FIG. 2 shows the diaphragm cell of FIG. 1 with a schematically illustrated flow pattern of the fluid
  • the diaphragm cell of FIG. 1 with schematically represented ion passage through the diaphragm diaphragm
  • FIG. 1 is a diagrammatic cross-sectional view of a device according to the invention for producing a sodium hypochlorite solution
  • FIG. 2 shows the diaphragm cell of FIG. 1 with a schematically illustrated flow pattern of the fluid
  • FIG. 4 shows a schematic view of the opened chamber cell electrolysis cell from FIG. 1 with the anode and cathode removed and the spacer in the form of a grid respectively arranged between the membrane and the anode or the cathode, a schematic view of the disassembled chamber cell electrolysis cell from FIG 4, with the anode and cathode in the installed state,
  • Fig. 6 is a schematic plan view of a erfindungsge ⁇ Permitted anode / cathode
  • Fig. 7 is a schematic side view of the anode / cathode of FIG. 6, and
  • FIG. 8 is a schematic plan view of the built Ano ⁇ de with schematically drawn flow along the anode from the anode space-solution inflow to
  • FIG. 1 shows an exemplary apparatus 1 for producing a sodium hypochlorite solution 44 having a redox value of more than 800 mV.
  • a chamber cell electrolysis cell 10 is provided in the form of a diaphragm cell with diaphragm membrane made of Teflon as a membrane 3, with a separation chamber 2, which is divided by the flat-shaped membrane 3 in a cathode compartment 4 and an anode compartment 5.
  • the separation chamber 2 is flowed through on both sides of the membrane 3 along this.
  • Flat in the sense of the invention are both planar and structured or perforated extensive areas.
  • cathode chamber 4 of the separation chamber 2 is at a negative voltage (-) (or zero volts) applied cathode 45 before ⁇ seen, which is arranged according to the flat membrane 3 flat parallel to this at a preselected distance to this, wherein the Cathode space 4 ei ⁇ nen cathode space-solution inlet 41 for a cathode space solution 43 and a cathode space-solution outlet 42 for a catholyte 44 has.
  • anode 55 is provided which entspre ⁇ accordingly the diaphragm 3 flat form in a preselected spaced planar parallel to this wherein the anode compartment 5 has an anode compartment solution inlet 51 for anode compartment solution 53 and an anode compartment outlet outlet 52 for anolyte 54.
  • the anode 5 and the cathode chamber 4 and the feed and from ⁇ flows 41, 51, 42, 52 are designed such that the solutions evenly flow past each of the two sides of the diaphragm membrane 3 over the entire surface, said to and outflows 41, 51, 42, 52 are disposed on opposite sides of the anode and cathode compartments.
  • a sodium-chlorite-water solution (saline solution) 6 can be fed to the anode-space solution feed 51, which can flow through the anode space 5 and, as anolyte 54, be removed from the anode space 5 at the anode-space solution outlet 52, and an anolyte line 56 is provided, by means of which the anolyte 54 can be supplied from the anode space-solution drain 52 to the cathode space 4 at the cathode space dissolution feed 41 and this can flow through parallel to the anode space 5, and that the sodium hypochlorite solution at the cathode space dissolution outflow 42 as Katholyt 44 is removable.
  • anode 55 and the cathode 45 in the anode or cathode chamber 5 and 4 are surrounded by anode-space solution 53 and cathode-space solution 43. It is also possible that the anode 55 or the cathode 45 that of the membrane
  • the preselected distances of the cathode 45 and the anode 55 are respectively selected to the membrane 3 to 2 mm to 3 mm. To ensure this, there is see the cathode 45 and the anode 55 and the membrane 3 are each a spacer in the form of a grid 61, 62 is provided.
  • This grid can be made of plastic, for example.
  • a mixer 72 which controls the salt concentration of the sodium chlorite-water solution (saline) 6.
  • a concentrated sodium-chlorite water solution 74 which is provided in a reservoir 75, and water 73, which is introduced into the anode chamber 5 at the anode chamber.
  • Solution feed 51 incoming sodium chlorite-water solution (saline) 6 mixed.
  • the setting is such that the sodium chlorite-water solution (saline) has a sodium-chlorite content mass fraction of 0.005 to 0.02 (concentration of 0.5 to 2%).
  • the anode space solution 53 then sweeps under the voltage applied to the anode 55 and the cathode 45 voltage through the anode compartment 5. Thereafter, this is taken as the anolyte 54 at the anode space-solution drain 52 and the anolyte line 56 to the cathode space 4 on Cathode space solution inflow 41 supplied as a cathode space solution 43.
  • the then finished solution is removed from the cathode compartment 4 at the cathode compartment solution outlet 42 as catholyte 44 or as sodium hypochlorite solution having a redox value of more than 800 mV from the chamber cell electrolysis cell 10.
  • the same control device 7 can regulate the solution flow rate through the chamber cell electrolysis cell 10 by means of the mixer 72.
  • This scheme can ⁇ SUC gene in dependence on a measured by a sensor 71 current between anode 54 and cathode 44th
  • the setting may be selected such that the catholyte 44 has a redox value of 800 to 1100 mV, preferably 950 mV.
  • the adjustment can be made such that the catholyte 44 has a pH of 8.5 to 10.5, preferably 9.5.
  • the adjustment can be made so that the catholyte 44 has a chlorine content of 100 to 1500 mg / ml.
  • two cells half-shells 11 and 12 are mutually screwed so that these ver hold the membrane 3 ⁇ by means of a crimped seal 8 in position.
  • FIGS. 2 and 3 the flow of the solutions through the anode compartment 5 and the cathode compartment 4 are shown again schematically in an enlargement and also schematically the passage of ions through the membrane 3, the spacer grids having been omitted for better illustration.
  • 4 and 5 show a schematic view of the geöff ⁇ designated chamber cell electrolysis cell of Fig. 1 with ⁇ taken out anode 55 and cathode 45 and the between the membrane ran 3 (only Fig. 5) and the anode 55 and the cathode 45 respectively arranged spacer in the form of the grids 61 and 62nd
  • FIG. 5 the anode 55 and cathode 45 are shown in the installed state in addition to FIG. 4 in addition.
  • FIGS. 6 and 7 show a schematic plan view and a side view of a cathode 45 according to the invention, wherein it can be seen that the surface of the cathode 45 has a rhombic grid structure 46.
  • the anode is designed identical in the example.
  • Fig. 8 is again a schematic plan view of the anode 55 with a built ⁇ schematically shownkohlberichtiganberichtem flow extending along the anode 55 from the anode compartment and solution inlet 51 to the anode compartment and solution drain 52nd The anode 55 is swept over the entire surface.

Abstract

L'invention concerne un dispositif (1) qui est destiné à préparer une solution d'hypochlorite de sodium ayant une un potentiel d'oxydoréduction supérieur à 800 mV et notamment un pH supérieur à 8 et qui comporte une unité d'électrolyse à chambres cellulaires (10) pourvue d'une chambre de séparation (2) laquelle est divisée en un espace cathodique (4) et un espace anodique (5) au moyen d'une membrane réalisée sous une forme plane, la chambre de séparation (2) étant des deux côté de la membrane (3) traversée par un flux longeant ladite membrane. Selon l'invention, une cathode (45) est disposée dans l'espace cathodique (4) à une distance prédéterminée par rapport à la membrane (3), l'espace cathodique (4) comportant une entrée de solution d'espace cathodique (41) destinée à une solution d'espace cathodique (43) et une sortie de solution d'espace cathodique (42) destinée à un catholyte (44), et une anode (55) est disposée dans l'espace anodique (5) à une distance prédéterminée par rapport à la membrane (3), l'espace anodique (5) comportant une entrée de solution d'espace anodique (51) destinée à une solution d'espace cathodique (53) et une sortie de solution d'espace anodique (52) destinée à un anolyte (54). Selon l'invention, une solution aqueuse de chlorite de sodium (solution de sel de table) (6) peut être acheminée vers l'entrée de solution d'espace anodique (51) pour ensuite traverser l'espace anodique (5) et pouvoir être prélevée sous forme d'anolyte (54) à la sortie de solution d'espace anodique (52), et une conduite d'anolyte (56) permet d'acheminer l'anolyte (54) depuis la sortie de solution d'espace anodique (52) vers l'entrée de solution d'espace cathodique (41) de l'espace cathodique (4), pour qu'il traverse ce dernier dans un sens parallèle à l'espace anodique (5) et que la solution d'hypochlorite de sodium puisse être prélevée sous forme de catholyte (44) à la sortie de solution d'espace cathodique (42).
PCT/DE2014/100022 2013-01-28 2014-01-28 Dispositif et procédé destinés à préparer une solution d'hypochlorure de sodium ayant un potentiel d'oxydoréduction supérieur à 800 mv et notamment un ph supérieur à 8 WO2014114291A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013100834.8 2013-01-28
DE102013100834.8A DE102013100834A1 (de) 2013-01-28 2013-01-28 Vorrichtung und Verfahren zur Herstellung einer Natriumhypochlorid-Lösung mit einem Redoxwert von mehr als 800 mV und insbesondere einem PH Wert von größer 8

Publications (2)

Publication Number Publication Date
WO2014114291A2 true WO2014114291A2 (fr) 2014-07-31
WO2014114291A3 WO2014114291A3 (fr) 2014-09-18

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PCT/DE2014/100022 WO2014114291A2 (fr) 2013-01-28 2014-01-28 Dispositif et procédé destinés à préparer une solution d'hypochlorure de sodium ayant un potentiel d'oxydoréduction supérieur à 800 mv et notamment un ph supérieur à 8

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WO (1) WO2014114291A2 (fr)

Cited By (2)

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JP2016174982A (ja) * 2015-03-18 2016-10-06 株式会社東芝 電解装置
CN113201756A (zh) * 2021-05-08 2021-08-03 潍坊思源环保设备有限公司 一种家用微酸性消毒机及其使用方法

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AT525630B1 (de) * 2022-03-08 2023-06-15 Luna Ip Gmbh Lagerstabile lösung umfassend hypochlorige säure bzw.hypochlorit
AT525645B1 (de) * 2022-02-09 2023-06-15 Luna Ip Gmbh Lagerstabile lösung umfassend hypochlorige säure bzw. hypochlorit

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JP3825958B2 (ja) * 1999-12-22 2006-09-27 キヤノン株式会社 塩素含有気体発生装置及び該塩素含有気体発生装置を用いた汚染気体分解装置
GB2409684B (en) * 2003-12-04 2008-07-09 Medipure Ltd Liquid medium, its use and methods for its production
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JP2016174982A (ja) * 2015-03-18 2016-10-06 株式会社東芝 電解装置
CN113201756A (zh) * 2021-05-08 2021-08-03 潍坊思源环保设备有限公司 一种家用微酸性消毒机及其使用方法

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WO2014114291A3 (fr) 2014-09-18

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