WO2016114364A1 - Dispositif de génération d'eau électrolysée - Google Patents

Dispositif de génération d'eau électrolysée Download PDF

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Publication number
WO2016114364A1
WO2016114364A1 PCT/JP2016/051025 JP2016051025W WO2016114364A1 WO 2016114364 A1 WO2016114364 A1 WO 2016114364A1 JP 2016051025 W JP2016051025 W JP 2016051025W WO 2016114364 A1 WO2016114364 A1 WO 2016114364A1
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Prior art keywords
electrode
flow path
flow
chamber
water
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PCT/JP2016/051025
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English (en)
Japanese (ja)
Inventor
英男 太田
横田　昌広
齋藤　誠
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株式会社 東芝
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Publication of WO2016114364A1 publication Critical patent/WO2016114364A1/fr

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    • 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

Definitions

  • Embodiment of this invention is related with an electrolyzed water generating apparatus.
  • electrolyzed water generating apparatuses that generate electrolyzed water having various functions by electrolyzing water, such as alkaline ionized water, ozone water, or hypochlorous acid water, have been provided.
  • an electrolyzed water generating apparatus for generating hypochlorous acid water there is an electrolyzing apparatus having a one-diaphragm two-chamber electrolytic cell and a two-diaphragm three-chamber electrolytic cell.
  • the one-membrane two-chamber electrolytic cell is an electrolytic cell in which an anode chamber containing an anode and a cathode chamber containing a cathode are opposed to each other with a diaphragm passing only specific ions.
  • the one-diaphragm two-chamber type electrolytic cell flows water mixed with salt as an electrolyte, and generates acidic water in the anode chamber and alkaline water in the cathode chamber.
  • the acidic water is water in which hypochlorous acid and hydrochloric acid are mixed
  • the alkaline water is water containing sodium hydroxide water or dissolved hydrogen.
  • an intermediate chamber filled with an electrolyte such as salt water is disposed between the anode chamber and the cathode chamber in order to prevent salt from being mixed into the generated acidic water and alkaline water.
  • the intermediate chamber and the anode chamber are separated by an anion exchange membrane, and the intermediate chamber and the cathode chamber are separated by a cation exchange membrane. And only the anion or cation required for electrolysis from salt water is passed through the anode chamber or the cathode chamber.
  • the problem to be solved by the embodiment is to provide an electrolyzed water generating apparatus having excellent electrolysis efficiency.
  • the electrolyzed water generating apparatus includes a first electrode and a second electrode, a first electrode chamber facing the first electrode and covering the first electrode, and the second electrode facing the second electrode.
  • An electrolyzer having a second electrode chamber covering the electrode, the electrolyzer comprising a plurality of channels provided in the first electrode chamber and respectively facing the first electrode, wherein the plurality of channels are A first flow path for flowing water at a first flow rate, and a second flow path for flowing water at a second flow rate faster than the first flow rate.
  • FIG. 1 is a block diagram schematically showing an electrolyzed water generating apparatus according to the first embodiment.
  • FIG. 2 is a perspective view showing an electrolytic cell of the electrolyzed water generating apparatus according to the first embodiment.
  • FIG. 3 is an exploded perspective view of the electrolytic cell.
  • FIG. 4 is a cross-sectional view of the electrolytic cell taken along line AA in FIG.
  • FIG. 5 is a perspective view showing an anode cover of the electrolytic cell.
  • FIG. 6 is an enlarged perspective view showing a part of the anode cover.
  • FIG. 7 is a plan view of the cathode cover schematically showing the flow path and water flow provided in the cathode chamber of the electrolytic cell.
  • FIG. 8 is a graph showing the relationship between the amount of flowing anode water and the effective chlorine concentration.
  • FIG. 9 is a perspective view showing an anode cover of an electrolytic cell according to a modification.
  • FIG. 1 is a diagram schematically showing a configuration of the entire electrolyzed water generating apparatus according to the first embodiment.
  • the electrolyzed water generating apparatus includes a so-called three-chamber electrolytic tank 11.
  • the electrolytic cell 11 is formed in a flat rectangular box shape, and the inside thereof includes an intermediate chamber 15a and an intermediate chamber 15a by an anion exchange membrane (first diaphragm) 16 and a cation exchange membrane (second diaphragm) 18. It is partitioned into an anode chamber (first electrode chamber) 15b and a cathode chamber (second electrode chamber) 15c located on both sides.
  • An anode (first electrode) 14 is provided in the anode chamber 15 b and faces the anion exchange membrane 16.
  • a cathode (second electrode) 20 is provided in the cathode chamber 15 c and faces the cation exchange membrane 18.
  • the anode 14 and the cathode 20 are formed in a rectangular plate shape having substantially the same size, and face each other with the intermediate chamber 15a interposed therebetween.
  • the electrolyzed water generator includes an electrolyte supply unit 19 that supplies an electrolytic solution, for example, saturated brine, to the intermediate chamber 15a of the electrolytic cell 11, and a raw water supply that supplies raw electrolytic water, for example, water to the anode chamber 15b and the cathode chamber 15c. And a power source 23 for applying a positive voltage and a negative voltage to the anode 14 and the cathode 20, respectively.
  • an electrolyte supply unit 19 that supplies an electrolytic solution, for example, saturated brine, to the intermediate chamber 15a of the electrolytic cell 11, and a raw water supply that supplies raw electrolytic water, for example, water to the anode chamber 15b and the cathode chamber 15c.
  • a power source 23 for applying a positive voltage and a negative voltage to the anode 14 and the cathode 20, respectively.
  • the electrolyte supply unit 19 includes a salt water tank 25 that generates saturated salt water, a supply pipe 19a that guides the saturated salt water from the salt water tank 25 to the lower portion of the intermediate chamber 15a, a liquid feed pump 29 provided in the supply pipe 19a, And a drain pipe 19b for sending the electrolytic solution flowing in the intermediate chamber 15a from the upper portion of the intermediate chamber 15a to the salt water tank 25.
  • the raw water supply unit 21 includes a water supply source (not shown) for supplying water, a water supply pipe 21a for guiding water from the water supply source to the lower portions of the anode chamber 15b and the cathode chamber 15c, and water flowing through the anode chamber 15b above the anode chamber 15b.
  • a first drain pipe 21b that discharges from the cathode chamber 15c
  • a second drain pipe 21c that drains water flowing through the cathode chamber 15c from the upper part of the cathode chamber 15c
  • a gas-liquid separator 27 provided in the second drain pipe 21c
  • the liquid feed pump 29 is operated to supply saturated salt water to the intermediate chamber 15a of the electrolytic cell 11, and water is supplied to the anode chamber 15b and the cathode chamber 15c.
  • a positive voltage and a negative voltage are applied from the power source 23 to the anode 14 and the cathode 20, respectively.
  • Sodium ions ionized in the brine flowing into the intermediate chamber 15a are attracted to the cathode 20, pass through the cation exchange membrane 18, and flow into the cathode chamber 15c.
  • water is electrolyzed at the cathode 20 to generate hydrogen gas and a sodium hydroxide aqueous solution.
  • the sodium hydroxide aqueous solution and hydrogen gas generated in this way flow out from the cathode chamber 15c to the second drain pipe 21c, and are separated into the sodium hydroxide aqueous solution and hydrogen gas by the gas-liquid separator 27.
  • the separated sodium hydroxide aqueous solution (alkaline water) is discharged through the second drain pipe 21c.
  • the chlorine ions ionized in the salt water in the intermediate chamber 15a are attracted to the anode 14, pass through the anion exchange membrane 16, and flow into the anode chamber 15b. Then, chlorine ions are reduced at the anode 14 to generate chlorine gas. Thereafter, the chlorine gas reacts with water in the anode chamber 15b to generate hypochlorous acid water and hydrochloric acid.
  • the acidic water hypochlorous acid water and hydrochloric acid
  • FIG. 2 is a perspective view of the electrolytic cell
  • FIG. 3 is an exploded perspective view of the electrolytic cell
  • FIG. 4 is a cross-sectional view of the electrolytic cell along line AA in FIG.
  • the electrolytic cell 11 has a rectangular frame-like intermediate frame 22 that functions as a partition, and a rectangular plate shape that has an outer diameter dimension substantially equal to the intermediate frame 22 and covers one side of the intermediate frame.
  • An anode cover (first cover member) 24 and a rectangular plate-like cathode cover (second cover member) 26 having an outer diameter dimension substantially equal to that of the intermediate frame 22 and covering the other side surface of the intermediate frame.
  • the intermediate frame 22 forms an intermediate chamber 15a with its inner peripheral surface.
  • the anode cover 24 forms an anode chamber 15b by a recess formed in the inner surface thereof
  • the cathode cover 26 forms a cathode chamber 15c by a recess formed in the inner surface thereof.
  • a first inlet 34 communicating with the intermediate chamber 15a is formed at the lower end of the intermediate frame 22, and a first outlet 36 communicating with the intermediate chamber 15a is provided at the upper end.
  • a supply pipe 19a and a drain pipe 19b are connected to the first inlet 34 and the first outlet 36, respectively.
  • An anion exchange membrane 16 is disposed between the intermediate frame 22 and the anode cover 24 as a first diaphragm separating the intermediate chamber 15a and the anode chamber 15b.
  • the anode 14 is disposed in the anode chamber 15 b and is in close proximity to the anion exchange membrane 16.
  • a cation exchange membrane 18 is disposed as a second diaphragm between the intermediate frame 22 and the cathode cover 26, and the cation exchange membrane 18 separates the intermediate chamber 15a and the cathode chamber 15c.
  • the cathode 20 is disposed in the cathode chamber 15 c and is in close proximity to the cation exchange membrane 18.
  • a planar sealing material 40 for preventing water leakage is disposed between the periphery of the ion exchange membrane 18 and between the periphery of the cathode 20 and the periphery of the cathode cover 26.
  • a plurality of fixing bolts 50 are inserted through the peripheral edge of each constituent member, for example, inserted from the anode cover 24 side, and the tip portion protrudes from the cathode cover 26.
  • a nut 52 is screwed into the tip of each fixing bolt 50.
  • the fixing bolts 50 and nuts 52 as fastening members fasten the peripheral portions of the constituent members to each other, and maintain the water tightness of the intermediate chamber 15a and the electrode chambers 15b and 15c.
  • each of the anion exchange membrane 16 and the cation exchange membrane 18 has an outer diameter substantially equal to that of the intermediate frame 22 and is formed into a thin rectangular flat plate having a thickness of about 100 to 200 ⁇ m. Is formed.
  • the anion exchange membrane 16 and the cation exchange membrane 18 have a characteristic of allowing only specific ions to pass therethrough.
  • a plurality of through holes through which the fixing bolts 50 are inserted are formed in the peripheral portions of the anion exchange membrane 16 and the cation exchange membrane 18.
  • the anion exchange membrane 16 is disposed to face one side of the intermediate frame 22, and the peripheral edge thereof is in close contact with the intermediate frame 22 via the sealing material 40.
  • the cation exchange membrane 18 is disposed to face the other surface side of the intermediate frame 22, and the peripheral edge thereof is in close contact with the intermediate frame 22 via the sealing material 40.
  • the first diaphragm and the second diaphragm are not limited to ion exchange membranes, and may be porous membranes having water permeability.
  • the anode 14 and the cathode 20 are formed of a metal flat plate having a thickness of about 1 mm, and are formed in a rectangular shape having an outer diameter substantially the same as the outer diameter of the intermediate frame 22.
  • a fine through-hole for allowing liquid to pass through is formed in the central part (effective area) of the anode 14 and the cathode 20, and a plurality of through-holes for inserting the fixing bolt 50 are formed in the peripheral part of the electrode.
  • the anode 14 has a connection terminal 14b protruding from one side edge thereof.
  • the cathode 20 has a connection terminal 20b protruding from one side edge thereof.
  • the connection terminals 14b and 20b are connected to the power source 23.
  • the anode 14 is disposed to face the anion exchange membrane 16 and is in close contact with the anion exchange membrane 16.
  • the cathode 20 is disposed to face the cation exchange membrane 18 and is in close contact with the cation exchange membrane 18.
  • an intermediate material such as a nonwoven fabric may be sandwiched between each electrode and the ion exchange membrane.
  • FIG. 5 is a perspective view showing the inner surface side of the anode cover
  • FIG. 6 is an enlarged perspective view showing a part of the anode cover.
  • the anode cover 24 has an inner surface 24 a that faces the anode 14 and an outer surface on the opposite side.
  • a rectangular recess 60 is formed in the inner surface 24 a of the anode cover 24, and the anode chamber 15 b is formed by the recess 60.
  • the anode chamber 15b is provided with a plurality of channels through which water flows. That is, a plurality of linear ribs 64 are erected on the bottom surface of the recess 60 and extend, for example, in the vertical direction (second direction Y).
  • These ribs 64 are provided in parallel to each other and at a predetermined interval. Between the two adjacent ribs 64, linear flow grooves 65 extending in the vertical direction are formed. The plurality of flow grooves 65 are opposed to the central portion of the anode 14 and form first flow paths P1 through which water flows.
  • the width W1 and the depth D1 of the flow groove 65 are, for example, W1: 8 mm and D1: 2 mm.
  • the cross-sectional area in the direction orthogonal to the flow direction of the first flow path P1 is about 16 mm 2 .
  • enlarged flow grooves 66b are provided adjacent to the left and right ends of the flow grooves 65. These enlarged flow grooves 66b are opposed to the peripheral edge of the anode 14 and form second flow paths P2 through which water flows.
  • the width W2 and the depth D2 of the enlarged flow groove 66b are, for example, W2: 5 mm and D2: 8 mm.
  • the cross-sectional area of the direction orthogonal to the flow direction of the 2nd flow path P2 is about 40 mm ⁇ 2 >, and is more than twice the cross-sectional area of the 1st flow path P1.
  • a pair of upper and lower lateral grooves 66a are formed at the ends of the flow grooves 65 and the enlarged flow grooves 66b.
  • the lateral groove 66a is a portion that receives water supply and drainage to the anode chamber 15b, and serves as a buffer portion for water pressure by providing a large capacity.
  • the horizontal groove 66a functions so that the difference in the amount of flowing water between the respective circulation grooves 65 and the difference in the amount of flowing water between the right and left enlarged circulation grooves 66b are eliminated.
  • a second inlet 37 is formed at the lower side of the anode cover 24 and communicates with one end of the lower lateral groove 66a.
  • a second outlet 38 is formed in the upper part of the side surface of the anode cover 24 and communicates with one end of the upper lateral groove 66a.
  • a water supply pipe 21a and a first drain pipe 21b are connected to the second inlet 37 and the second outlet 38, respectively.
  • the cathode cover 26 is configured in the same manner as the anode cover 24 described above.
  • a third inlet 39 is formed at the lower side of the cathode cover 26 and communicates with the cathode chamber 15c.
  • a third outlet 41 is formed on the upper side of the cathode cover 26 and communicates with the cathode chamber 15c.
  • a water supply pipe 21a and a second drain pipe 21c are connected to the third inlet 39 and the third outlet 41, respectively.
  • the ions are less likely to be thinned according to the flow rate of the first flow path P1, that is, the chlorine ion concentration of the water flowing through the first flow path P1 is higher than when the second flow path P2 is not provided, and the chlorine gas is efficiently reduced. Can be generated.
  • the second flow path P2 the chlorine ion concentration is lowered and the generation efficiency of chlorine gas is reduced.
  • the second flow path P2 is in contact with the anode 14 as compared with the area where the first flow path P1 is in contact with the anode 14.
  • hypochlorous acid water having different concentrations is obtained in the first flow path P1 and the second flow path P2, but is mixed and discharged by the lateral groove 66a.
  • electrolysis efficiency is improved, and hypochlorous acid water having a sufficient chlorine concentration is obtained.
  • the second flow path P2 has a high flow rate of flowing water (flowing water speed), and can increase the flow rate. Therefore, the total flow rate of water in the anode chamber 15b can be maintained at a sufficient flow rate while reducing the flow rate of the first flow path P1 that is the main generation source of hypochlorous acid water, or the total flow rate is increased. be able to.
  • FIG. 8 shows the relationship between the flow rate (flow rate) of the water flowing through the first flow path P1 and the effective chlorine concentration of the generated acidic water.
  • 6 L / min which is a standard flow rate
  • the effective chlorine concentration during electrolysis was measured using anode chambers with different flow path structures.
  • the effective chlorine concentration is as low as 70% or less. This is because when chlorine ions that have passed through the anion exchange membrane move to the anode 14, if the flow rate of water flowing through the first flow path P ⁇ b> 1 is large, the chlorine ions immediately diffuse in the water, and the vicinity of the anode 14. This is because the chlorine ion concentration in the lowers.
  • a constant current is passed through the anode 14 and the amount of chlorine ions required for the reaction is insufficient, it reacts with hydroxide ions instead to generate oxygen gas. If a large amount of oxygen gas that does not contribute to the generation of hypochlorous acid is generated, the generation efficiency of the effective chlorine concentration is lowered.
  • the effective chlorine concentration is as high as 70 to 80%. This is because if the flow rate is small, the diffusion of chlorine ions by water is small, so that the chlorine ion concentration in the vicinity of the anode 14 can be maintained high. If a sufficient amount of chlorine ions required for the reaction is present when a constant current is passed through the anode 14, the generation of oxygen gas, which is a side reaction, can be suppressed and the production efficiency of effective chlorine concentration can be increased.
  • the area of the portion in contact with the first flow path P1 which is the main body of the reaction, is larger than the area of the portion in contact with the second flow path P2 having a large cross-sectional area. Is preferably twice or more. Since the ratio of the area in contact with the anode 14 of the first flow path P1 is relatively large, the area of the anode in contact with the high concentration chlorine ions is increased, and the effective chlorine concentration can be increased.
  • the cross-sectional area of the groove forming the second flow path P2 is preferably at least twice as large as the cross-sectional area of the groove forming the first flow path P1, and more preferably at least three times.
  • the relationship between the width and depth of the flow channel groove is narrower and deeper in the second flow channel P2 than in the first flow channel P1, as in the embodiment. In this case, the area where the second flow path P2 is in contact with the anode 14 can be reduced, and the influence of the efficiency reduction of the second flow path P2 can be reduced.
  • the second flow path P2 having a large cross-sectional area is provided to face the peripheral edge of the anode 14 having a relatively low chlorine ion concentration. Therefore, the first flow path P1, which is the main component of the reaction, can be disposed so as to face the central portion of the anode 14 having a high chlorine ion concentration, and the efficiency of hypochlorous acid production can be increased.
  • the shape of the first flow path P1 is desirably a linear flow path in order to reduce the resistance of the water flow.
  • an electrolyzed water generating device in which the ion concentration is increased without reducing the flow rate of water flowing through the anode chamber, and electrolysis efficiency and electrolyzed water generation efficiency are improved. can do.
  • FIG. 9 is a perspective view showing an anode cover of an electrolyzed water generating apparatus according to a modification.
  • the first flow path P1 provided in the anode chamber 15b of the anode cover 24 is formed by one flow groove 65 extending in a bellows shape.
  • the first flow path P1 extends over substantially the entire area of the anode chamber 15b so as to be in contact with the substantially entire area of the anode 14.
  • the lower end of the first flow path P1 communicates with the lower lateral groove 66a.
  • the upper end of the first flow path P1 communicates with the upper lateral groove 66a.
  • the present invention is not limited to the above-described embodiments as they are, 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 electrolytic cell is not limited to a three-chamber type, and may have a two-chamber configuration as long as it has an anode chamber.
  • the electrolytic solution may be other than salt water, and the generated electrolytic water may be electrolytic water other than hypochlorous acid water.

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

Abstract

L'invention comprend, selon un mode de réalisation, un dispositif de génération d'eau électrolysée dotée d'une cuve d'électrolyse comprenant : une première électrode et une seconde électrode ; une première chambre d'électrode faisant face à la première électrode et recouvrant la première électrode ; et une seconde chambre d'électrode faisant face à la seconde électrode et recouvrant la seconde électrode. La cuve d'électrolyse comprend une pluralité de trajets d'écoulement formés à l'intérieur de la première chambre d'électrode, chacun faisant face à la première électrode, et la pluralité de trajets d'écoulement comprennent un premier trajet d'écoulement avec l'eau circulant à une première vitesse d'écoulement et un deuxième trajet d'écoulement avec l'eau s'écoulant à une seconde vitesse d'écoulement plus rapide que la première vitesse d'écoulement.
PCT/JP2016/051025 2015-01-14 2016-01-14 Dispositif de génération d'eau électrolysée WO2016114364A1 (fr)

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JP2015-005011 2015-01-14
JP2015005011A JP2018030042A (ja) 2015-01-14 2015-01-14 電解水生成装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190014799A (ko) * 2017-08-03 2019-02-13 주식회사 영우워터라인 수소수용 전해조

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7169021B1 (ja) * 2021-12-28 2022-11-10 株式会社アクト 生成装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07136658A (ja) * 1993-11-24 1995-05-30 Tatsuo Okazaki 連続式電解整水装置
JPH07308673A (ja) * 1994-05-19 1995-11-28 Sanden Corp 電解イオン水生成装置
JPH08318277A (ja) * 1995-05-24 1996-12-03 Sanyo Electric Co Ltd 電解槽
JPH09253649A (ja) * 1996-03-25 1997-09-30 Glory Kiki Kk 電解イオン水生成装置
JP2003024940A (ja) * 2001-07-17 2003-01-28 Sanyo Electric Co Ltd 水処理装置
JP2007260493A (ja) * 2006-03-27 2007-10-11 Kurita Water Ind Ltd 電解装置
JP2007283276A (ja) * 2006-04-20 2007-11-01 Nippon Paint Co Ltd 電気分解処理方法およびそのための装置
WO2008130016A1 (fr) * 2007-04-13 2008-10-30 Yusho Arai Appareil pour produire une eau électrolysée, procédé pour produire une eau électrolysée et eau électrolysée

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07136658A (ja) * 1993-11-24 1995-05-30 Tatsuo Okazaki 連続式電解整水装置
JPH07308673A (ja) * 1994-05-19 1995-11-28 Sanden Corp 電解イオン水生成装置
JPH08318277A (ja) * 1995-05-24 1996-12-03 Sanyo Electric Co Ltd 電解槽
JPH09253649A (ja) * 1996-03-25 1997-09-30 Glory Kiki Kk 電解イオン水生成装置
JP2003024940A (ja) * 2001-07-17 2003-01-28 Sanyo Electric Co Ltd 水処理装置
JP2007260493A (ja) * 2006-03-27 2007-10-11 Kurita Water Ind Ltd 電解装置
JP2007283276A (ja) * 2006-04-20 2007-11-01 Nippon Paint Co Ltd 電気分解処理方法およびそのための装置
WO2008130016A1 (fr) * 2007-04-13 2008-10-30 Yusho Arai Appareil pour produire une eau électrolysée, procédé pour produire une eau électrolysée et eau électrolysée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190014799A (ko) * 2017-08-03 2019-02-13 주식회사 영우워터라인 수소수용 전해조
KR101959081B1 (ko) * 2017-08-03 2019-03-15 (주)영우워터라인 수소수용 전해조

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