WO2021176256A1 - Procédé industriel de désinfection de l'eau par électrolyse, appareil pour sa réalisation et ses utilisations - Google Patents

Procédé industriel de désinfection de l'eau par électrolyse, appareil pour sa réalisation et ses utilisations Download PDF

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Publication number
WO2021176256A1
WO2021176256A1 PCT/IB2020/051952 IB2020051952W WO2021176256A1 WO 2021176256 A1 WO2021176256 A1 WO 2021176256A1 IB 2020051952 W IB2020051952 W IB 2020051952W WO 2021176256 A1 WO2021176256 A1 WO 2021176256A1
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WIPO (PCT)
Prior art keywords
machinery
cylinder
water
sodium hypochlorite
naclo
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Ceased
Application number
PCT/IB2020/051952
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English (en)
Inventor
Stevan BROUWER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aquaswisstech Ast Ag
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Aquaswisstech Ast Ag
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Priority to PCT/IB2020/051952 priority Critical patent/WO2021176256A1/fr
Publication of WO2021176256A1 publication Critical patent/WO2021176256A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • 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
    • C25B1/265—Chlorates
    • 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
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • 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
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46152—Electrodes characterised by the shape or form
    • C02F2001/46171—Cylindrical or tubular shaped
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/42—Nature of the water, waste water, sewage or sludge to be treated from bathing facilities, e.g. swimming pools
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/008—Mobile apparatus and plants, e.g. mounted on a vehicle
    • 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
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • 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
    • C02F2209/02—Temperature
    • 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
    • C02F2209/29—Chlorine compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Definitions

  • the present invention is directed to the realization of an electrolytic proceeding for the production on-site of the disinfectant sodium hypochlorite (NaClO) for sanitizing any type of water.
  • NaClO disinfectant sodium hypochlorite
  • the present invention is directed to a dedicated equipment/system which, through the use of salt and electricity only, enables to produce and supply in controlled, variable and automatic way, the desired quantity of disinfectant agent directly in the place of use, thus modulating it depending on the need of use and the environment.
  • Said system enables to supply continuously to the environment the only necessary quantity of disinfectant to obtain the required sanitization, thus avoiding at the same time the production of dangerous collateral products, such as chlorate ions.
  • the electrolysis of brine (saturated or highly concentrated solution (up to about 26%) substantially of sodium chloride, NaCl) is one of the known methods for producing sodium hypochlorite.
  • Sodium hypochlorite is a chemical compound whose formula is NaClO, unstable in anhydrous form (it decomposes explosively), which, however, is widely used (since the 18th century) as a disinfectant or a very efficient bleaching agent, in particular in the form of an aqueous solution.
  • a disinfectant or a very efficient bleaching agent in particular in the form of an aqueous solution.
  • chlorine strongly oxidizing active ingredient, chlorine
  • the collateral products of sodium hypochlorite decomposition it is also possible to mention, among others, the formation of chlorate ions which are remarkably harmful to health and the environment.
  • the chlorate ion is an ionic species which is formed in the anodic compartment during the electrolysis phase of the brine, as a result of a parasitic reaction between two chlorite ions (CIO-), present due to the massive concentration of chlorine at high temperatures or in any case in long periods of storage and direct exposure to (UV) solar rays.
  • CIO- chlorite ions
  • the chlorate ion is remarkably harmful in many respects. In fact, being a highly stable compound, the chlorate ion tends to accumulate on the anodic side of the electrolytic cell, thus concentrating within the brine itself.
  • the chlorate ion is also a strong pollutant for the food chain (for example, it is a suspected agent which causes pathologies of thyroid, nervous system and circulatory system) and for everything that becomes part of it, such as, for example, drinking water.
  • sodium hypochlorite for water disinfection (such as, for example, drinking water, sanitary water, process water, and waste water) is limited by instability over time of the product itself and the presence of said toxic products.
  • preparations are generally used, for example in the form of tablets, whose reaction causes the generation of sodium hypochlorite.
  • preparations may be used in the event of sanitization of a swimming pool.
  • the aim of the present invention is to provide a satisfying solution to the technical issue described above.
  • the aim of the present invention is to provide a machinery which resolves at least in part said technical disadvantages.
  • the aim of the present invention is to provide a compact machinery capable of producing in precise and controlled way and modulable over time a predetermined quantity of (NaClO).
  • the aim of the present invention is also to provide a machinery which can be readily realized in various scales and sizes, which is readily programmable thus enabling to control/monitor and modify real-time all the operative parameters, among which the quantity of final product (NaClO).
  • the aim of the present invention is also to provide a machinery which is automatic and reduces to a minimum the production of toxic and/or polluting substances such as chlorate ions.
  • a collection tank (10) intended for containing in use a brine and arranged in communication with said inlet (IN);
  • At least an electrolytic system comprising at least one electrolytic cell (30a, 30b) of cylindrical- coaxial type;
  • Feeding means (40a, 40b) configured for enabling to pipe the said brine, contained in use within said collection tank (10), towards said electrolytic system;
  • the machinery comprises an electronic control/management system through which the said machinery can be programmed and managed real-time.
  • the machinery can be suitably controlled and programmed thus varying the various parameters, for example through a control panel.
  • the machinery can be realized in various sizes and therefore it is compact and transportable, besides producing disinfectant in precise quantities depending on needs.
  • a frame possibly mounted on wheels on which the components of the machine are arranged/assembled.
  • the machine can be readily moved where it is necessary and in the event of necessity. Otherwise, it can be fixed on-site.
  • this readily transportable and compact machinery integrates in itself all the elements to produce the final product NaCIO. Therefore, it is present at least a reservoir for brine and an electrolytic system, for example constituted by one or more electrolytic cells of cylindrical type, intended for carrying out electrolysis of brine for producing and supplying sodium hypochlorite directly on-site.
  • an electrolytic system for example constituted by one or more electrolytic cells of cylindrical type, intended for carrying out electrolysis of brine for producing and supplying sodium hypochlorite directly on-site.
  • the electronic control and/or management system such as a computerized system PLC (Programmable Logic Controller), preferably digital, controls the process, thus enabling to make it automatic if necessary.
  • PLC Programmable Logic Controller
  • this machinery can give a suitable solution to the technical issue generated by the above-described needs.
  • a second duct (54) which connects the first cylinder to the second cylinder and through which the liquid separated from the hydrogen flows in use;
  • the first cylinder comprising an inlet (55') for the mixture to separate from the hydrogen and the second cylinder comprising an outlet (57) for the separated hydrogen
  • the second cylinder (52) comprises inside a floating element (59) movable through a closing position in which it closes said outlet (57) and an opening position in which it releases said outlet, the said floating element being configured for floating on the liquid contained in use in the second cylinder so as to position itself, due to said floating, in said closing position thus obstructing the outlet 57 and plunge at least in part when a predetermined pressure acts onto it thus positioning itself in said opening position.
  • the hydrogen which flows from the first to the second cylinder through the first duct (53) acts onto said floating element thus plunging it once it reaches a certain pressure value and thus releasing the outlet 5 from which it can flow.
  • electrolytic cell for a machinery for sanitizing water and wherein said electrolytic cell is cylindrical (30a, 30b) and it is formed by one cathode and one anode, both cylindrical and coaxial to one another.
  • said electrolytic cell is composed by graphite and titanium and even more preferably the cathode of said cylindrical electrolytic cell is graphite and the anode is titanium.
  • Figure 1 depicts the external part of this machinery according to claim 1;
  • Figure 2 depicts a schematization of a preferred embodiment of the apparatus according to the invention for the production through electrolysis of sodium hypochlorite from brine, that is the machinery with the provided internal components;
  • FIG. 3 is a flowchart of the functioning
  • Figure 8 depicts a schematization of the cylindrical electrolytic cell and thus formed by two coaxial cylinders for the realization of anode and cathode.
  • the present invention is directed to a system/machine for producing sodium hypochlorite by means of electrolysis of a brine (saturated or highly concentrated solution of NaCl) at a concentration of NaCl in water up to 26% in weight; preferably up to 20% in weight; more preferably, up to approximately 15% in weight; even more preferably, up to 10% in weight; such as, for example, up to 5% in weight; preferably, from 0% up to 3,5 % in weight.
  • a brine saturated or highly concentrated solution of NaCl
  • the machine 1 as per figure 1, is fitted with an external covering 2, which contains inside the necessary components for its functioning and they are described in greater details further with reference to the further figure 2 and from figure 4 to figure 6.
  • the external covering 2 is fitted with a movable wicket 3 which is activatable between an opening position and a closing position, so that when it is opened can give access to the inside of the machinery to a containment tank of brine (which is not depicted in figure 1 but outlined in figure 2).
  • the wicket 3 may be removed thus releasing the opening, even if, obviously, the use of a wicket makes the machine safer and prevents the impurities from entering into the inner tank and therefore into the brine.
  • the above-mentioned collection tank is the one accessible through the wicket 3.
  • figure 2 outlines with dashed line the external covering 2 of the machine within which the components are inserted and the tank 10 among them.
  • the figure depicts clearly the wicket 3 with dashed line.
  • the external covering 2 is provided with an inlet, indicated in figure 2 with the wording ( IN) from which the water to treat enters, for example through a connection to any water supply system.
  • IN the wording
  • the inlet of water occurs preferably at zero French degrees which are a unit of measurement of hardness of water (generally this value indicates that water is devoid or substantially devoid of calcium and magnesium).
  • the water softener avoids deposits in electrolytic cells and thus it protects them over time.
  • the water softener is arranged upwards to the inlet ( IN) and it is not depicted in figure 2.
  • a first pump (outlined in figure with number 20) thrusts water through a duct 21 which pipes water within the containment tank 10.
  • this pump is optional since water may penetrate into the tank 10 simply through the pressure of the water supply system itself.
  • salt sodium chloride
  • the salt is charged manually and it is generally available on the market in the form of bags of tabs of sodium chloride with certified bags which generally weigh 10 or 25 kg.
  • a certain quantity of brine is piped through one or more flow switches (40a, 40b) towards the electrolytic cell/s (30a, 30b) so that the required treatment occurs.
  • a second pump interposed between the flow switches and the tank 10 for thrusting the flow towards the flow switches and from here towards the electrolytic cells.
  • Said pump is a dosing pump which regulates only the quantity of brine to which fresh water is added, but it does not regulate the water flow.
  • the pump serves for integrating the concentrate of salty water needed by the machinery.
  • figure 2 depicts two electrolytic cells showing the negative and positive poles through which the process of electrolysis occurs.
  • the electrolytic cells as schematized in figure 2, are cylindrical.
  • the electrolytic system comprises a suitable system of electrical feeding for the cells.
  • the cells are preferably fed at c.a. 6.5 V DC.
  • two or more transformers may be provided for each cell with current from 20 to 300 A, depending on sizes.
  • the electrolytic cells are tubular cells, that is cylindrical and, thus, not with plates. As depicted in figure 2, they have a cylindrical shape and then there is envisaged an external cylindrical ring within which, concentrically, there is provided the internal ring (it is not visible in figure 2 for simplicity purposes).
  • the external ring and the internal ring coaxial to one another are respectively anode and cathode and are made of the above-mentioned materials, i.e. graphite and titanium (cathode of graphite and anode of titanium).
  • the external ring is the anode of titanium and the internal ring concentric to the external one, is the cathode of graphite.
  • electrolytic cells of cylindrical size is important since it optimizes the process of production of NaCIO thus contributing to reduce the production of chlorate ions.
  • this embodiment of electrolytic cell it is taken advantage to the maximum extent of the salt inserted in the tank 10 to obtain NaCIO with the maximum efficiency.
  • the lifespan of this kind of electrolytic cell unlike commonly used plates, is considerably longer and polluting residues are reduced to a minimum, thus obtaining a perfectly eco-friendly machinery.
  • This embodiment proved to be optimal for producing NaClO with respect to conventional electrolytic cells with plates used for systems belonging to the same technical field.
  • electrolytic cells are fitted with anode and cathode, as schematized in figure 2 with the respective positive sign for the cathode and negative sign for the anode.
  • the outlet of the treated product i.e. NaClO, goes into the water to treat.
  • the component 50 describes a hydrogen separator, since the reaction of electrolysis produces a certain quantity of hydrogen while a minimum part thereof remains dissolved.
  • the separator 50 is used in order to eliminate the produced hydrogen.
  • first cylinder 51 connected to a second cylinder 52 through an upper duct 53 and a lower duct 54.
  • the upper duct 53 connects the upper part of the cylinder 51 with the upper part of the cylinder 52 while the lower duct 54 connects the two lower parts of the two cylinders respectively.
  • the separated hydrogen moves from the upper duct 53 into the cylinder 52 from which it is expelled outwards.
  • number 55 indicates the arrow of motion of water containing NaCIO and hydrogen to purify from hydrogen indeed.
  • Number 55' indicates the inlet to said separator, this inlet is connected to a duct which obviously communicates with electrolytic cells.
  • the separation between hydrogen and water with NaCIO occurs in the first cylinder 51.
  • water with NaCIO is piped towards the second cylinder downwards through the duct 54, for example according to the system of communicating vessels or generating a suitable moving pressure.
  • the arrows 58 depict the path of water with NaCIO in inlet to the second cylinder.
  • the element 59 is a floating element, in particular a plunger float, which can flow within the cylindrical body 52 between an opening position, in which it releases the opening 57 and a closing position in which it obstructs it.
  • a floating element in particular a plunger float
  • the floating cut-off is thrusted by said pressure which acts onto the surface thereof towards the bottom of the cylinder 52 thus plunging at least in part into the underlying liquid.
  • the floating element forms a valvular opening/closing system with the opening with which it cooperates .
  • the separator has the advantages not only of cleaning the product from the produced hydrogen but also to enable to provide a recovery section which collects hydrogen for other uses.
  • the machine has an electronic management system, such as a PLC, a control unit or similar systems, such that the machinery is programmable and it is autonomous in functioning, once it is programmed.
  • an electronic management system such as a PLC, a control unit or similar systems, such that the machinery is programmable and it is autonomous in functioning, once it is programmed.
  • the management control system enables to program the machinery precisely such that a precise quantity of brine can be supplied from the tank 10 towards the electrolytic cell/s and then a precise quantity of NaClO is produced at a predetermined time interval.
  • a suitable detecting system (which is not depicted here) signals the aforesaid necessity to the above management and control system which intervenes real-time by modifying or activating the machine and/or automatically regulating the parameters of interest to supply the new required quantity of NaClO.
  • one or more external sensors communicating with the machine.
  • the machine connects and communicates with said one or more sensors which measure one or more physical parameters, for example they detect the parameters of water to disinfect.
  • These sensors may be a measuring instrument of chlorine, pH, etc. and they communicate with the machine (wireless, for example).
  • a constant value of chlorine (or other parameter) may be programmed on the machine to maintain in the place where sensors are arranged.
  • the machine receives in input the measurement values carried out by said sensors which operates in the environment to sanitize (for example, the value of chloride).
  • the machine processes automatically through its own control system the received data and produces on-site and pipes a precise quantity of NaClO so that the value measured by the sensor/s remain constant to values set in the machine.
  • Deviations measured by the sensor and sent to the machine implies an automatic regulation of the machine which may increase the flow and/or act on the electrolytic cells in order to maintain constant the set values.
  • the said electronic management system is programmed according to the description above.
  • the sensors send the value continuously detected to the machine and the machine which receives the value modulates the quantity of NaClO so as to maintain constant the set value.
  • Deviations from the values measured by sensors imply an automatic modulation of the machine.
  • the machine can communicate with said external sensors which monitors the environment to sanitize and send the measurement parameters so that the machine modulates the production of NaClO as a function of the received parameters.
  • the machine is remotely controllable; know connection systems such as Wi-Fi connection, cable connection or the like enable to render the machine reachable through the Internet and then to be remotely monitorable/manageable/controllable, such as through a PC.
  • An operator may activate/deactivate the machine remotely, control and manage it by varying parameters and functionality.
  • the variability may be always carried out through control panel.
  • figure 3 depicts a flowchart which describes the phases of functioning of the present machinery.
  • the water to treat is piped towards the tank 10 where the brine is obtained.
  • the water in inlet is preferably softened.
  • a pre-filter for rough impurities may be provided Immediately on the inlet, upwards to the tank 10, a pre-filter for rough impurities may be provided.
  • the pre filter per se is a product available on the market and various equivalent types of filters may be used.
  • an electromagnetic valve and a PLC manage the piping through the duct 21 of water to treat towards the tank 10.
  • the brine forms within the tank through the salt which is charged manually or through automatic systems.
  • a float for regulating the charging of brine may be provided so as to activate the potential pump 20 in order to pipe water towards the tank 10 when the level goes down below a threshold value and stop the filling when the tank reaches a maximum threshold value of filling.
  • the electrolytic cells treat water according to the known electrolytic process, which is not described here and pipe the product which has been obtained from chloride towards a potential hydrogen separator so that the treated final product goes towards the tank or the place of collection of the water to treat (if there is no separator, the product is directly supplied into the tank without undergoing the phase of separation of hydrogen).
  • figure 4 depicts the apparatus subject of the invention in which the external covering 2 has been removed to highlight the internal components.
  • the external covering 2 may be realized so as to slide with respect to an inner support frame 5 which supports the internal components described thereinafter .
  • Figure 4 depicts a longitudinal sliding which obviously facilitates the extraction, even if a solution of vertical sliding could be envisaged, thus lifting up the external covering 2.
  • the double direction of the arrow of figure 4 indicates indeed the possible movement of the external covering 2 to the preferred longitudinal direction.
  • the external covering is fully made of PP (polypropylene).
  • PP polypropylene
  • This high-quality material has not only a high lifespan but also gives an additional protection to the operator since plastic does not conduct electricity. Moreover, when it is closed, the housing gives protection to splashes within the system.
  • the bearing structure within the machinery, in particular the internal frame, has been engineered so that water and electricity are always separated from one another. This design gives an additional protection to the operator .
  • the basin of brine has been constructed in the midst of a transparent window so that the operator can control visually the level of brine without opening the system. Moreover, the basin of brine may be readily removed from the housing, for example after cleaning.
  • figure 4 depicts the tank 10 leaning on a suitable horizontal shelf and facing the previously described opening 3 of the sump 2.
  • the external covering 2 can be locked in the closing position of the frame in various ways, among which magnetic systems and/or fastening systems, inserts or the like.
  • the covering can be removed/reapplied by the magnetic system which facilitates this operation.
  • figure 5 depicts some previously described components.
  • the figure depicts a point of inlet of water which, as mentioned, is preferably at zero French degrees.
  • the inlet intercepts a filter 11 which cleans water from the rough sediments (per-filter).
  • the possible pump (as mentioned, it is sufficient the same pressure of the water source of the aqueduct, thus the pump is not strictly necessary) exhausts water along the duct 21 towards the tank 10 which is filled by water and the addition of salt.
  • Number 22 indicates an electromagnetic valve necessary for the level of water in the basin of brine.
  • a further pump 23 is schematized which exhausts brine from the tank to pipe it, through the duct 24, towards a flow switch 40 which regulates the brine flow fed towards the electrolytic cell.
  • filters may be provided within the tank or along the outlet path to purify and then filter brine further before it arrives at the electrolytic cells.
  • filters may be provided to purify and then filter brine further before it arrives at the electrolytic cells.
  • the filter is a special development made of granulated plastic.
  • the duct 41 pipes brine towards the electrolytic cell with an outlet from the bottom thereof, as outlined in figure 5.
  • the duct 41 is connected to the bottom of the electrolytic cell 30 depicted in the subsequent figure
  • the electrolytic cells may be one or more than one depending on the sizes of the machinery and the quantity of product to produce.
  • Electrolytic cells carry out electrolysis.
  • Figure 6 depict a non-limiting case of one electrolytic cell.
  • the treated product goes towards the possible hydrogen separator, if it is present, to end into the liquid to treat.
  • the part of electronic management envisages a programmable electronic management system.
  • the machine is also fitted with a suitable voltage generator (direct current) which supplies the electrolytic cell/s.
  • the tension value to the heads of cells is modulated and therefore it is managed by the electronic management system so as to treat brine adequately according to the programming .
  • Voltage and the quantity of brine which reaches the electrolytic cells in the unit of time are control parameters. These two parameters enable to regulate the quantity of NaClO which is produced.
  • a further parameter controlled and managed by the system is the temperature within the electrolytic cell/s.
  • the temperature must not exceed preferably 38°C, since over 38°C the electrolytic system begins to produce chlorate ions which, as already described, are toxic and dangerous for the environment and the system.
  • the electronic management system acts by modulating (decreasing) the intensity of current and the production of NaClO thus enabling to decrease the temperature within the inside of the cell/s below critical values.
  • the system may activate the turn-off of the machine.
  • the machine may be turn off at temperatures above or below 50°C.
  • the machine may be realized in various sizes but it is preferably of transportable size so that an operator may move it from a place to another one.
  • the electrolytic system/device of the present invention proved to be particularly useful in many different fields of treatment of water; drinking water, sanitary water, process water and also refluent water.
  • said system is advantageously usable for disinfecting water, for example swimming water for private or public pools, hotel pools, covered, uncovered, lap pools, pools in amusement parks, hydromassage pools, pools with salty and sulfurous water.
  • the utility of the system of the invention applies advantageously to process water, disinfection of containers, glasses, bottles, cooling circuits and cooling towers, papermaking industry, supply of drinking water, supply of municipal and town water, therapeutic pools such as in hospitals and rehabilitation centers.
  • the equipment/device of the present invention enabled to obtain and modulate the production of hypochlorite with a high degree of purity, substantially devoid of impurities and harmful degradations, such as chlorate ions; at the same time, it has also enabled to control continuously over time the release/dosage of it in the desired place of application, thus obtaining the desired disinfection of water.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

Dans le domaine de la technologie de purification et de désinfection de l'eau, la présente invention concerne la réalisation d'un procédé électrolytique pour la production sur site d'hypochlorite de sodium (NaCIO) en tant que désinfectant pour tout type d'eau. En particulier, la présente invention concerne un équipement/système dédié qui, par l'utilisation de sel et d'électricité uniquement, permet de produire et de fournir de manière contrôlée, variable et automatique, la quantité désirée d'agent désinfectant directement sur le lieu d'utilisation, en la modulant ainsi en fonction du besoin d'utilisation et de l'environnement. Ledit système permet de fournir en continu à l'environnement la seule quantité de désinfectant nécessaire pour obtenir l'assainissement requis, évitant ainsi en même temps la production de produits collatéraux dangereux, tels que les ions chlorate.
PCT/IB2020/051952 2020-03-06 2020-03-06 Procédé industriel de désinfection de l'eau par électrolyse, appareil pour sa réalisation et ses utilisations Ceased WO2021176256A1 (fr)

Priority Applications (1)

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PCT/IB2020/051952 WO2021176256A1 (fr) 2020-03-06 2020-03-06 Procédé industriel de désinfection de l'eau par électrolyse, appareil pour sa réalisation et ses utilisations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/051952 WO2021176256A1 (fr) 2020-03-06 2020-03-06 Procédé industriel de désinfection de l'eau par électrolyse, appareil pour sa réalisation et ses utilisations

Publications (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120168319A1 (en) * 2010-12-30 2012-07-05 Valeri Iltsenko Method and device for disinfectant production
WO2012166997A2 (fr) * 2011-05-31 2012-12-06 Clean Chemistry, Llc Réacteur électrochimique et procédé associé
WO2017049052A1 (fr) * 2015-09-18 2017-03-23 Evoqua Water Technologies Llc Systèmes de distribution in-situ pour réduction de produit de réaction dans des cellules électrochimiques
CN108505061A (zh) * 2018-07-03 2018-09-07 中国水利水电科学研究院 一种高浓度次氯酸钠发生器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120168319A1 (en) * 2010-12-30 2012-07-05 Valeri Iltsenko Method and device for disinfectant production
WO2012166997A2 (fr) * 2011-05-31 2012-12-06 Clean Chemistry, Llc Réacteur électrochimique et procédé associé
WO2017049052A1 (fr) * 2015-09-18 2017-03-23 Evoqua Water Technologies Llc Systèmes de distribution in-situ pour réduction de produit de réaction dans des cellules électrochimiques
CN108505061A (zh) * 2018-07-03 2018-09-07 中国水利水电科学研究院 一种高浓度次氯酸钠发生器

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