WO2016047161A1 - Dispositif electrolytique et procede de generation d'eau electrolysee - Google Patents

Dispositif electrolytique et procede de generation d'eau electrolysee Download PDF

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Publication number
WO2016047161A1
WO2016047161A1 PCT/JP2015/054981 JP2015054981W WO2016047161A1 WO 2016047161 A1 WO2016047161 A1 WO 2016047161A1 JP 2015054981 W JP2015054981 W JP 2015054981W WO 2016047161 A1 WO2016047161 A1 WO 2016047161A1
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Prior art keywords
water
chamber
anode
cathode
supply
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PCT/JP2015/054981
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English (en)
Japanese (ja)
Inventor
横田　昌広
英男 太田
千草　尚
松田　秀三
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株式会社 東芝
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Priority to JP2015537862A priority Critical patent/JP5859177B1/ja
Priority to CN201580033138.4A priority patent/CN106460206A/zh
Priority to US15/068,023 priority patent/US20160194770A1/en
Publication of WO2016047161A1 publication Critical patent/WO2016047161A1/fr

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    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • 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
    • 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
    • C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
    • 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
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
    • 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
    • C25B13/00—Diaphragms; Spacing elements
    • 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
    • C25B13/00—Diaphragms; Spacing elements
    • C25B13/02—Diaphragms; Spacing elements characterised by shape or form
    • 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
    • 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
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • 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
    • C02F2201/4611—Fluid flow
    • 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
    • C02F2209/03—Pressure

Definitions

  • Embodiment described here is related with the electrolyzer and the electrolyzed water production
  • an electrolyzed water generating apparatus having a three-chamber electrolytic cell has been used as an apparatus for generating alkaline ionized water, ozone water, hypochlorous acid water, or the like.
  • the inside of the casing is divided into three chambers, an anode chamber, an intermediate chamber, and a cathode chamber, by a diaphragm composed of a cation exchange membrane and an anion exchange membrane.
  • An anode and a cathode are respectively disposed in the anode chamber and the cathode chamber.
  • salt water is flowed in the intermediate chamber, water is flowed in the left and right cathode chambers and the anode chamber, and the salt water in the intermediate chamber is electrolyzed with the cathode and the anode, thereby being generated in the anode chamber.
  • Hypochlorous acid water is generated from chlorine gas, and sodium hydroxide water is generated in the cathode chamber.
  • the produced hypochlorous acid water is used as sterilizing / disinfecting water, and sodium hydroxide water is used as washing water.
  • Documents related to the above-described technology are shown below, the entire contents of which are incorporated herein by reference.
  • the anion exchange membrane that partitions the intermediate chamber and the anode chamber is poor in durability to chlorine gas and acid alkali generated at the anode.
  • the electrode, the ion exchange membrane, and the like are caused by a difference in water pressure between the anode chamber and / or the cathode chamber and the intermediate chamber generated when water and an electrolyte solution are supplied to the electrolytic cell. There is a case where a gap is generated between the two and the electrolytic characteristics fluctuate.
  • the problem dealt with by this embodiment is to provide an electrolyzing device or an electrolyzed water generating method for improving durability or electrolysis efficiency.
  • the electrolysis device is opposed to the first diaphragm that is divided into an intermediate chamber and an anode chamber through which the electrolyte solution flows, the second diaphragm that is divided into the intermediate chamber and the cathode chamber, and the first diaphragm.
  • An electrolytic cell comprising an anode provided in the anode chamber and a cathode provided in the cathode chamber facing the second diaphragm; and supplying water to the anode chamber and the cathode chamber; A water supply unit that intermittently varies a supply and discharge amount of water to at least one of the anode chamber and the cathode chamber; an electrolyte solution supply unit that supplies and discharges an electrolyte solution to and from the intermediate chamber; and the anode chamber and the A control unit that applies a voltage to the anode and the cathode to electrolyze the electrolyte solution in a state where the supply / discharge amount of water is small or is still water in at least one of the cathode chambers.
  • FIG. 1 is a schematic configuration diagram of an electrolysis apparatus according to the first embodiment.
  • FIG. 2 is a schematic configuration diagram of an electrolysis apparatus according to the second embodiment.
  • FIG. 3 is a schematic configuration diagram of an electrolysis apparatus according to the third embodiment.
  • FIG. 4 is a schematic configuration diagram of an electrolysis apparatus according to the fourth embodiment.
  • FIG. 1 is a diagram schematically showing the overall configuration of the electrolysis apparatus 1 according to the first embodiment.
  • the electrolysis apparatus 1 includes a three-chamber type electrolytic cell 10.
  • the electrolytic cell 10 includes, for example, a substantially rectangular box-shaped casing.
  • the inside of the casing is divided into an intermediate chamber 18a and an anode chamber 18b and a cathode chamber 18c located on both sides of the intermediate chamber 18a by the first diaphragm 17a and the second diaphragm 17b.
  • the 1st diaphragm 17a and the 2nd diaphragm 17b are each comprised with the porous film of the same specification.
  • An anode 15a is provided in the anode chamber 18b close to the first diaphragm 17a
  • a cathode 15b is provided in the cathode chamber 18c close to the second diaphragm 17b.
  • the intermediate chamber 18a has a first inflow port 14a into which the electrolyte solution flows and a first outflow port 14b through which the electrolyte solution that has flowed through the intermediate chamber 18a is discharged.
  • the anode chamber 18b has a second inlet 12a through which electrolytic water flows and a second outlet 12b through which the electrolytic water that has flowed through the anode chamber 18b is discharged.
  • the cathode chamber 18c has a third inlet 16a through which electrolytic water flows and a third outlet 16b through which the electrolytic water that has flowed through the cathode chamber 18c is discharged.
  • the capacities of the anode chamber 18b and the cathode chamber 18c are both 500 cc. Generally, when the capacity of the anode chamber 18b and the cathode chamber 18c is 200 cc or more, the cycle of the intermittent operation described below is not shortened, and the control becomes easy.
  • the porous membranes constituting the first diaphragm 17a and the second diaphragm 17b basically have no ion selective permeability but are resistant to chlorine gas, such as oxide ceramic, PVDF (polyvinylidenedifluoride) resin, PTFE. (Polytetrafluoroethylene) resin can be selected.
  • a porous membrane in order to use a porous membrane as a diaphragm of an electrolytic cell, it must be able to permeate the electrolyte. Since the porous membrane does not have an ion selection system, as a result, selection of a porous membrane having water permeability is indispensable.
  • a porous membrane having a water permeability of, for example, 10 ml / min / cm 2 / MPa can be used.
  • the relative water pressure with respect to the anode chamber 18b and the cathode chamber 18c of the intermediate chamber 18a is set to 2 kPa or less, thereby generating the anode chamber 18b and the cathode chamber 18c.
  • the salt content in alkaline water and acidic water is 300 ppm or less, and can meet the tap water standard.
  • a porous membrane having a water permeability in the range of 0.1 to 10 ml / min / cm 2 / MPa and a pore diameter in the range of 2 to 100 nm is used, the relative water pressure is 1 to 10 kPa. Even within this range, salt contamination can be prevented.
  • the porous membrane having the above water permeability and pore size for example, it is desirable to use an ultrafiltration membrane.
  • the electrolyzer 1 of the present embodiment can perform electrolysis in a state where the saline solution in the intermediate chamber 18a, the anode chamber 18b, and the water in the cathode chamber 18c are still.
  • the electrolyzer 1 includes an electrolytic solution supply unit 20 that supplies an electrolytic solution, for example, saturated saline, to the intermediate chamber 18 a of the electrolytic cell 10, and electrolytic water, for example, to the anode chamber 18 b and the cathode chamber 18 c.
  • the electrolyte solution supply unit 20 includes a salt water tank (electrolyte solution tank) 70 that generates and stores a saturated saline solution, a supply pipe 20a that guides the saturated saline solution from the salt water tank 70 to the intermediate chamber 18a through the first inflow port 14a, and a supply pipe 20a.
  • a liquid feed pump 50 provided therein and a discharge pipe 20b for circulating the saline flowing through the intermediate chamber 18a from the first outlet 14b to the salt water tank 70 again are provided.
  • the electrolysis apparatus 1 according to the first embodiment has a specification in which a saline solution as an electrolyte solution is circulated between the intermediate chamber 18 a and the salt water tank 70 by a liquid feed pump 50.
  • a solenoid valve 100 and a liquid feed pump 50, which will be described later, provided in the water supply pipe 80a are connected to the control unit 500, and the operation is controlled by the control unit 50.
  • the liquid feed pump 50 operates and stops every 5 seconds in conjunction with the electromagnetic valve 100. That is, the liquid feed pump 50 is repeatedly operated and stopped with 10 seconds as one cycle.
  • the water pressure in the intermediate chamber 18a when the liquid feed pump 50 is operated is about 5 to 15 kPa, and the water pressure in the intermediate chamber 18a when the liquid feed pump 50 is stopped is 0 kPa or an infinitely small water pressure.
  • the salt solution in the intermediate chamber 18a quickly becomes hydrostatic as the liquid feed pump 50 is stopped.
  • the water supply pressure of the liquid feed pump 50 and the opening / closing time of the electromagnetic valve 100 may be determined according to the capacity of the electrolytic cell 10. However, when a saturated saline solution is used as the electrolyte solution, the amount of electrolyte consumed is extremely small compared to the amount of flowing water, and therefore the operation of the liquid feeding pump 50 does not necessarily have to coincide with the time when the electromagnetic valve 100 is opened.
  • the operation time of the liquid feed pump 50 may be 2 seconds and the stop time may be 8 seconds, or at 2-10 cycles, that is, at the timing when the electromagnetic valve 100 is opened only once every 20-100 seconds.
  • the liquid feed pump 50 may be operated by thinning the operation frequency so as to operate.
  • the system is switched between water supply and static water by operating and stopping the liquid supply pump 50, but the essence of the embodiment is to control the water pressure by intermittently changing the amount of flowing water. Therefore, the electrolysis apparatus 1 does not necessarily need to be controlled only by operating and stopping the liquid feeding pump 50.
  • the water supply amount of the liquid feed pump 50 may be changed using an inverter circuit, and the time for increasing the water supply amount and the time for decreasing the water supply amount may be intermittently performed. That is, in the electrolysis apparatus 1 according to the embodiment, appropriate water pressure control may be switched intermittently.
  • the water supply unit 80 includes a water supply source (not shown) for supplying water, a water supply pipe 80a for guiding water from the water supply source to the lower part of the anode chamber 18b and the cathode chamber 18c, and an electromagnetic valve 100 provided in the water supply pipe 80a.
  • a pipe 80c and check valves 400b and 400c provided in the first drain pipe 80b and the second drain pipe 80c are provided.
  • the water supply pipe 80a branches into two branches from the solenoid valve 100, one end of the branched pipe is connected to the second inlet 12a provided in the anode chamber 18b, and the other end is provided in the cathode chamber 18c.
  • the three inflow ports 16a are connected.
  • the generated acidic water and alkaline water Due to the presence of the check valves 400b and 400c provided in the first drain pipe 80b and the second drain pipe 80c, the generated acidic water and alkaline water have a higher water pressure in the anode chamber 18b and the cathode chamber 18c than a predetermined value. Although it is discharged in some cases, it does not flow backward from the downstream side to the anode chamber 18b and cathode chamber 18c side. Therefore, it is possible to suppress an increase in the internal pressure of the piping system due to the gas generated during electrolysis and the backflow of the generated acidic water and alkaline water. In addition, the check valves 400b and 400c can prevent the entry of insects and air from the outside.
  • the standard flow rate is 1 L / 5 seconds.
  • the flow path and the piping are configured so that the water pressure in the anode chamber 18b and the cathode chamber 18c is 20 to 30 kPa.
  • the solenoid valve 100 repeats the operation of opening for 5 seconds and closing for 5 seconds in conjunction with the liquid feed pump 50. As a result, while the solenoid valve 100 is open, the water in the anode chamber 18b and the cathode chamber 18c is pushed out by 1 L in 5 seconds, and the water in the anode chamber 18b and the cathode chamber 18c each having a capacity of 500 cc is completely replaced. I am doing so.
  • the water pressure in the anode chamber 18b and the cathode chamber 18c is 0 kPa when the solenoid valve 100 is closed, or 20 to 30 kPa when the solenoid valve 100 is open when the solenoid valve 100 is open.
  • the water pressure in the intermediate chamber 18a is 0 kPa or an infinitely small water pressure when the liquid feed pump 50 is stopped, and 5 to 15 kPa when the liquid feed pump 50 is operating.
  • the solenoid valve 100 is always open at the timing when the liquid feed pump 50 is operating, and the water pressure in the anode chamber 18b and the cathode chamber 18c becomes higher than the water pressure in the intermediate chamber 18a, and the water pressure from the intermediate chamber 18a increases. Salt is prevented from being mixed into the anode chamber 18b and / or the cathode chamber 18c through the porous film.
  • the water supplied and discharged to the anode chamber 18b and the cathode chamber 18c by intermittently opening and closing the electromagnetic valve 100 is assumed to repeat water supply and static water intermittently.
  • the control of the flowing water pressure may be realized by reducing the amount of water supplied to the anode chamber 18b, the cathode chamber 19c, and the intermediate chamber 18a.
  • a water supply pump may be provided in the water supply pipe 80a, the water supply amount of the water supply pump may be controlled by inverter control, and during electrolysis, the water supply amount may be reduced to reduce the water pressure to a predetermined value or less.
  • the electrolytic solution may be electrolyzed by applying a voltage to the anode 15a and the cathode 15c in a state where the supply / discharge amount of water to the anode chamber 18b and the cathode chamber 18c is small.
  • the liquid feed pump 50, the power source 40, and the electromagnetic valve 100 are controlled by the control unit 500, and the supply and discharge of the liquid, the opening and closing of the valve, and the application of the voltage are appropriately synchronized.
  • the water pressure of the water supply source is set to a standard water pressure of 0.2 MPa with a regulator or the like, and when the solenoid valve 100 is opened, for example, the pressure is adjusted so that the water supply amount is 24 L / min.
  • the operation / stop of the liquid feed pump 50 and the opening / closing of the solenoid valve 100 are synchronized to supply saturated saline to the intermediate chamber 18a of the electrolytic cell 10, and water is supplied to the anode chamber 18b and the cathode chamber 18c. Supply water.
  • the operation time of the liquid feed pump 50 and the opening time of the electromagnetic valve 100 are each 5 seconds. Subsequently, the liquid feed pump 50 is stopped and the solenoid valve 100 is closed simultaneously for 5 seconds.
  • the operation stop of the liquid feed pump 50 and the opening and closing of the electromagnetic valve 100 are repeatedly performed with 10 seconds as one cycle while being synchronized.
  • the operation stoppage of the liquid feed pump 50 and the opening / closing cycle of the solenoid valve may be adjusted as appropriate in consideration of the capacity of the anode chamber 18b, the cathode chamber 18c and the intermediate chamber 18a and / or the water pressure of the water supply source.
  • the cycle of the intermittent operation becomes longer and control becomes easier.
  • the burden on the apparatus is reduced and the life of the liquid feed pump is extended.
  • the amount of water to be supplied by opening the solenoid valve 100 is about 2000 cc, which is twice the total of the capacity of the anode chamber 18a and the capacity of the cathode chamber 18a. In other words, an extra amount of water about twice the capacity of each room is sent to replace with new water.
  • the saline solution and water in the intermediate chamber 18a, the anode chamber 18b, and the cathode chamber 18c become static water, and the water pressure in each chamber is 0 kPa or a sufficiently small water pressure. Become.
  • voltage is applied to the anode 15a and the cathode 15b, and electrolysis is performed.
  • the control unit 500 synchronizes the stop of the first liquid feeding pump 50, the closing of the electromagnetic valve 100, and the application of voltage to the anode 15a and the cathode 15b.
  • the anode chamber 18b and the cathode chamber 18c generate 6 L / min of acidic water and alkaline water, respectively.
  • the water supply pressure of the liquid supply pump 50 is approximately 5 to 15 kPa, and the water supply pressure of the feed water source is approximately 20 to 30 kPa. Therefore, even when the porous membranes 17a and 17b having water permeability are used, the water pressure in the anode chamber 18b and the cathode chamber 18c is compared with the water pressure in the intermediate chamber 18a when the saline and water are fed to the electrolytic cell 10. Thus, the salinity does not mix from the intermediate chamber 18a into the anode chamber 18b and / or the cathode chamber 18c.
  • the chlorine ions ionized in the saline solution in the intermediate chamber 18a are attracted to the anode 15a, pass through the porous membrane 17a, and flow into the anode chamber 18b. Then, chlorine gas is generated at the anode 15a, and the chlorine gas reacts with water in the anode chamber 18b to generate hypochlorous acid and hydrochloric acid. At the same time, sodium ions and water can pass through the water-permeable porous membrane 17a. However, since the water pressure in each chamber is zero during electrolysis, the passing amount of sodium ions is suppressed to a slight amount below the tap water standard.
  • the acidic water (hypochlorous acid and hydrochloric acid) generated in this way flows out from the second outlet 12b of the anode chamber 18b through the first discharge pipe 80b. Thereafter, the processing described above is repeated.
  • the above is description of a series of electrolyzed water production
  • the electrolysis device 1 not only when each of the saline solution and the water is in a still water state, but also when each of the saline solution and the water is being fed, the anode The water pressure in the chamber 18b and the cathode chamber 18c is higher than the water pressure in the intermediate chamber 18a, and salt is prevented from being mixed into the anode chamber 18b and the cathode chamber 18c from the intermediate chamber 18a.
  • the electrolysis apparatus 1 including the three-chamber electrolytic cell uses a highly resistant and water-permeable porous membrane as the first diaphragm and the second diaphragm.
  • the water flow in each chamber is hydrostatic during electrolysis to eliminate the difference in water pressure, and when water is supplied, the intermediate chamber is set to a negative pressure from the other chambers to prevent salt from entering the anode and cathode chambers.
  • the diaphragm is not easily destroyed by chlorine gas or the like, and stable electrolysis can be performed.
  • FIG. 2 is a schematic configuration diagram of the electrolysis apparatus 1 according to the second embodiment.
  • an anode auxiliary chamber 90b and a cathode auxiliary chamber 90c having a capacity of 2L are further provided in the first drain pipe 80b and the second drain pipe 80c.
  • the other configuration of the electrolysis apparatus 1 is the same as that of the electrolysis apparatus 1 according to the first embodiment.
  • the amount of water to be supplied at one time can be increased even if the capacity of the positive electrode chamber 18b and the negative electrode chamber 18c is reduced, and the solenoid valve 100 can be supplied.
  • the period of the intermittent operation such as opening and closing of can be increased to, for example, 30 seconds (for example, the electromagnetic valve 100 is opened for 6 seconds and closed for 24 seconds). That is, in the electrolysis apparatus 1 according to the second embodiment, the burden on the apparatus is reduced.
  • the opening / closing cycle of the solenoid valve 100 is not limited to 30 seconds, but may be 20 seconds, 40 seconds, 50 seconds, or 60 seconds.
  • the ratio of the time for opening and closing the electromagnetic valve 100 is not limited to 1: 4 and can be changed as appropriate.
  • the time for opening the solenoid valve 100 can be shortened by increasing the diameters of the water supply pipe 80a, the first drain pipe 80b, and the second drain pipe 80c.
  • an auxiliary chamber is provided in the drainage pipe separately from the electrolytic cell 10 so as to communicate with the electrolytic cell 10. For this reason, the combined capacity of the anode chamber 18b (cathode chamber 18c) and the anode auxiliary chamber 90b (cathode auxiliary chamber 90b) is increased, so that excess water during water feeding is reduced and the concentration of hypochlorous acid water is not easily increased. It is configured.
  • the electrolysis apparatus 1 according to the second embodiment adopting the above configuration has a long cycle of intermittent operation, so that the burden on the apparatus is reduced and the electrolysis efficiency of the anode chamber 18b is maintained at a high level.
  • the electrolysis apparatus 1 including the three-chamber electrolytic cell prevents the salt from entering the anode chamber and the cathode chamber, and the diaphragm is discarded by chlorine gas or the like. Therefore, stable electrolysis can be performed.
  • FIG. 3 is a schematic configuration diagram of the electrolysis apparatus 1 according to the third embodiment.
  • water-tight ion exchange membranes 13a and 13b are used as the first diaphragm and the second diaphragm of the electrolytic cell 10, and the room in the electrolytic cell 10 is partitioned. Yes.
  • the liquid feeding pump 50 is always operated without being intermittently operated. That is, a saturated saline solution is always allowed to flow into the intermediate chamber 18a.
  • the other structure of the electrolyzer 1 is the same as that of the electrolyzer 1 which concerns on 1st Embodiment.
  • a water pressure of 10 kPa is always applied to the intermediate chamber 18a, while water is intermittently sent to the anode chamber 18b and the cathode chamber 18c by the electromagnetic valve 100 to perform electrolysis. Is performed when the water in the anode chamber 18b and the cathode chamber 18c is in a still water state and the water pressure is 0 kPa. Therefore, during electrolysis, the water pressure in the intermediate chamber 18a is higher than that in the anode chamber 18b and the cathode chamber 18c, and the ion exchange membrane is in close contact with the electrode by water pressure. Therefore, the production efficiency and water quality stability of alkaline water and acidic water are improved.
  • an inexpensive pump has a low water supply pressure of about 10 kPa, and the water pressure on the intermediate chamber 18a side is low in a state where water flows into the anode chamber 18b and the cathode chamber 18c.
  • the intermediate chamber 18a is electrolyzed in a desirable state with a positive pressure relative to the anode chamber 18b and the cathode chamber 18c. can do.
  • the electrolysis apparatus 1 including the three-chamber electrolytic cell can perform stable electrolysis while preventing the salt from being mixed into the anode chamber and the cathode chamber.
  • FIG. 4 is a schematic configuration diagram of an electrolysis apparatus 1 according to the fourth embodiment.
  • the electromagnetic valve 100 is provided in the water supply pipe 80a connected to the second inlet 12a of the anode chamber 18b, and only the anode chamber 18b is intermittently fed with water.
  • the cathode chamber 18c is configured to constantly flow at a predetermined flow rate. In this case, a water pressure difference is generated between the cathode chamber 18c and the intermediate chamber 18a, but no water pressure difference is generated between the anode chamber 18b and the intermediate chamber 18a. Therefore, it is possible to prevent salt from being mixed into the anode chamber 18b.
  • the porous membrane 17a resistant to chlorine gas is used as the first diaphragm, stable electrolysis can be performed.
  • the second diaphragm that partitions the cathode chamber 18c and the intermediate chamber 18a uses a cation exchange membrane 13b that does not have water permeability and does not contain salt even if there is a difference in water pressure. It was.
  • the pH of the saline used for electrolysis tends to fluctuate.
  • the salt solution is basically subjected to electrolysis in a still water state, and when the consumption of the salt solution reaches a limit, the salt solution is replaced (for example, the first liquid feeding pump 50 is operated once every 30 minutes). ) It was configured to be discarded. For this reason, a check valve 400 is provided in the supply pipe 20a so that the salt water whose water quality has changed from the intermediate chamber 18a does not reversely diffuse.
  • the other configuration of the electrolysis apparatus 1 is the same as that of the electrolysis apparatus 1 according to the first embodiment.
  • the electrolysis apparatus 1 including the three-chamber electrolytic cell is separated from the anode chamber 18b and the cathode chamber 18c by salt gas while preventing the salt from entering the anode chamber 18b and the cathode chamber 18c. Is less likely to be destroyed and stable electrolysis can be performed.
  • the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.
  • various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.
  • constituent elements over different embodiments may be appropriately combined.
  • the electrolyte solution may be other than saline and can be selected in a timely manner according to the application.
  • the electrolyzed water to be generated is not limited to hypochlorous acid water or sodium hydroxide water, and can be selected in a timely manner according to the application.
  • the opening / closing time of the solenoid valve 100 and the time for electrolysis described in the above embodiments can be appropriately changed according to the purpose.
  • the concentration of hypochlorous acid to be generated is changed to double
  • the value of the voltage applied to the anode 15a may be doubled
  • the time for closing the solenoid valve 100 without changing the value of the applied voltage. May be about twice as long.
  • the time for opening the solenoid valve 100 can be shortened by increasing the set value of the water supply pressure of the liquid feed pump 50.

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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)
  • Automation & Control Theory (AREA)
  • Inorganic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne un dispositif électrolytique comportant: une cellule électrolytique (10) comprenant un premier diaphragme (17a) séparant un compartiment intermédiaire (18a) à travers lequel circule une solution électrolytique et un compartiment anodique (18b), un second diaphragme (17b) séparant le compartiment intermédiaire (18a) et un compartiment cathodique (18c), une anode (15a) disposée dans le compartiment anodique (18b) pour être en regard du premier diaphragme (17a), et une cathode (15b) disposée dans le compartiment cathodique (18c) pour être en regard du second diaphragme (17b); une unité d'alimentation en eau (80) pour alimenter de l'eau au compartiment anodique (18b) et/ou au compartiment cathodique (18c), et faire varier de manière intermittente la quantité d'eau fournie et évacuée vers et depuis le compartiment anodique (18b) et/ou le compartiment cathodique (18c); et une unité d'alimentation en solution électrolytique (20) pour alimenter et évacuer la solution électrolytique vers et depuis le compartiment intermédiaire (18a); et une unité de commande (500) pour électrolyser la solution électrolytique par l'application d'une tension à l'anode (15a) et à la cathode (15b) lors de la réduction de la quantité d'alimentation d'eau et d'évacuation d'eau vers et depuis le compartiment anodique (18b) et/ou le compartiment cathodique (18c) ou lorsque l'eau est statique dans le compartiment anodique (18b) et/ou le compartiment cathodique (18c).
PCT/JP2015/054981 2014-09-22 2015-02-23 Dispositif electrolytique et procede de generation d'eau electrolysee WO2016047161A1 (fr)

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JP2015537862A JP5859177B1 (ja) 2014-09-22 2015-02-23 電解装置および電解水生成方法
CN201580033138.4A CN106460206A (zh) 2014-09-22 2015-02-23 电解装置和电解水生成方法
US15/068,023 US20160194770A1 (en) 2014-09-22 2016-03-11 Electrolytic apparatus and method of producing electrolyzed water

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JP2014-192939 2014-09-22

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AU2018212642B2 (en) 2017-01-26 2021-02-04 Diversey, Inc. Neutralization in electro-chemical activation systems
US11319635B2 (en) * 2018-03-27 2022-05-03 Tokuyama Corporation Electrolysis vessel for alkaline water electrolysis
CN108640229A (zh) * 2018-03-28 2018-10-12 广州市康亦健医疗设备有限公司 一种定时变换电解槽电极的酸化水生成装置

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JPH11179359A (ja) * 1997-12-24 1999-07-06 Chemicoat & Co Ltd 超電解イオン水製造装置
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