JP2011168857A - Electrolytic cell structure of diaphragm electrolytic cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrolytic cell with which early corrosion of an electrode plate is drastically suppressed or prevented by rapidly introducing gaseous chlorine or the like, tending to build up on the upper side of each electrolytic chamber of a diaphragm electrolytic cell, to an outlet of water produced by electrolysis, discharging it to the outside of the system, making the water produced by electrolysis smoothly flow out from the outlet, and suppressing or certainly controlling exposure of an upper end portion of the electrode plate to the gaseous chlorine. <P>SOLUTION: The electrolytic cell is constructed by forming a plurality of gaps E arranged in parallel to one another in the direction of the width of the electrolytic chamber between members facing stepped parts 13a, 13b and members opposite thereto, wherein the stepped parts 13a, 13b having recessed shapes and opening on the side opposite to a membrane 10c are arranged on the upper end portion of each vertical frame portion 13 of spacers 10a, 10b constructing an electrode plate unit 10, so as to capture a gas produced on surfaces of the electrode plates 10d, 10e in the respective gaps E, and to make the captured gas flow out together with the water produced by electrolysis. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a diaphragm electrolytic cell constituting an electrolyzed water generating device, and more particularly to an electrolytic cell structure of the diaphragm electrolytic cell.

  As one formation of the diaphragm membrane electrolytic cell constituting the electrolyzed water generating apparatus, the electrolyzed water is introduced in the lower part and the electrolyzed water outlet part is provided in the upper part. The electrode plate on the anode side and the electrode plate on the cathode side are arranged on the side surfaces of the diaphragm sandwiched between a pair of square frame spacers while maintaining the interval defined by each spacer. There is a diaphragm membrane electrolytic cell in which one or a plurality of electrode plate units are accommodated (see Patent Documents 1 and 2).

  In the diaphragm membrane electrolytic cell of this type, the electrolyzed water flowing into each electrolysis chamber formed by the electrode plate unit flows upward along each electrode plate, and during this time, the electrolyzed water is electrolyzed by diaphragm electrolysis. Each electrolyzed water produced is introduced into each outlet port from each electrolysis chamber and flows out from each outlet port.

JP-A-8-158084 JP 2004-18836 A

As described above, in the diaphragm electrolytic cell of this type, each electrolytically generated water generated in each electrolytic chamber is introduced into each outlet port from each electrolytic chamber and flows out from each outlet port. However, gas such as chlorine gas generated at the time of diaphragm electrolysis gradually accumulates above each electrolysis chamber, and the retained gas is introduced into each outlet port of each electrolyzed water. There is a risk that it will not flow out smoothly from each outlet.
In general, the electrode plate constituting the electrode plate unit is formed to have substantially the same dimensions as the spacer in consideration of the electrolytic efficiency. For this reason, the upper end of the electrode plate is exposed to chlorine gas or the like staying above each electrolysis chamber, and the electrode plate may be corroded early.

  Accordingly, an object of the present invention is to generate chlorine gas, etc., which tends to stay above each electrolytic chamber, in a diaphragm membrane electrolytic cell of this type, by quickly introducing it into the outlet and discharging it out of the system. Electrolytically generated water is allowed to flow smoothly from the outlet, and the upper end of each electrode plate is prevented from being exposed to chlorine gas as much as possible. It is to suppress or prevent.

  The present invention relates to an electrolytic cell structure of a diaphragm membrane electrolytic cell. The diaphragm electrolyzer to which the present invention is applied has a pair of a predetermined length of a casing having an inlet for electrolyzed water at a lower part and an outlet for electrolytically generated water at an upper part. An electrode plate unit in which an electrode plate on the anode side and an electrode plate on the cathode side are arranged on the side surfaces of the diaphragm sandwiched by square frame spacers while maintaining the distances defined by the spacers. Electrolyzed water produced by separating the electrolyzed water flowing into the electrolysis chambers formed by the electrode plate unit and flowing upward along the electrode plates, together with the electrolysis of the diaphragm Is a diaphragm electrolytic cell of a type configured to flow out from each electrolytic chamber through the outlet port.

  Therefore, in the diaphragm membrane electrolytic cell according to the present invention, the spacer includes a plurality of vertical frame portions extending in parallel while maintaining a predetermined distance from the lower frame portion to the upper frame portion of the rectangular outer frame portion. A grid-like frame body, the upper end portion of each vertical frame portion of the grid-like frame body is provided with a concave step portion that opens to the opposite side of the diaphragm, the step portion between the opposing members A plurality of the gaps are arranged in parallel in the width direction of each of the electrolysis chambers, capture gas generated on the surface of the electrode plate during diaphragm membrane electrolysis, and capture the trapped gas together with electrolyzed water. It functions to be introduced into the outlet port.

  In the diaphragm electrolyzer according to the present invention, the electrode plate constituting the electrode plate unit is formed to be shorter than the spacer, and the upper end portion of the electrode plate is formed as a step portion of the vertical frame portion of the spacer. It can be configured so as to avoid from the gap.

  Further, in the diaphragm membrane electrolytic cell according to the present invention, a plurality of the electrode plate units are accommodated in a casing in a state of being overlapped with each other, and a step portion of a vertical frame portion of each spacer constituting each electrode plate unit Can be configured to face each other to form the gap.

In the diaphragm membrane electrolytic cell according to the present invention, a plurality of gaps formed in step portions provided in each vertical frame portion of the grid frame constituting the spacer are arranged in parallel in an upper portion in the electrolytic cell. These gaps function to positively capture the gas generated on the surface of the electrode plate during diaphragm electrolysis and introduce the trapped gas into the outlet port together with the electrolytically generated water.
Therefore, in the diaphragm electrolyzer according to the present invention, a large amount of gas generated in each electrolytic chamber does not stay in the upper part of each electrolytic chamber, and the electrolytically generated water is smoothly introduced into the outlet port. Thus, it can be smoothly discharged from the outlet. In addition, when electrolytically generated water flows out from each electrolysis chamber, it flows out with the gas received in each gap, so that the influence of chlorine gas etc. at the upper end of each electrode plate can be greatly suppressed. The early corrosion of the electrode plate can be prevented.
In the diaphragm electrolyzer according to the present invention, each electrode plate is formed to be shorter than each spacer, and the upper end portion of each electrode plate is avoided from each gap. In other words, each electrode plate If it is configured so that the upper end of the electrode does not face each gap, the influence of chlorine gas etc. on the upper end of each electrode plate can be regulated almost certainly, and further early corrosion of the electrode plate can be prevented. Can do.
Further, in the diaphragm electrolytic cell according to the present invention, a plurality of electrode plate units are accommodated in a casing in a state of being polymerized with each other, and the step portions of the vertical frame portions of the spacers constituting each electrode plate unit are opposed to each other. If arranged in this manner, a large gap can be formed by the steps facing each other, and each gap that is formed can more reliably receive the generated gas, thereby further advantageously discharging the generated chlorine gas and the like. can do.

It is the rear view which looked at the apparatus main body of the electrolyzed water generating apparatus equipped with the diaphragm membrane electrolyzer concerning the present invention from the back side. It is the front view (a) of the said diaphragm membrane electrolytic cell, and the vertical side view (b) longitudinally cut | disconnected by the arrow 2-2 line of the same figure. It is a perspective view of the state which decomposed | disassembled the electrode plate unit which comprises the said diaphragm membrane electrolytic cell. Front view of spacer constituting the electrode plate unit (a), vertical side view (b) vertically cut by the line 4-4 in the same figure, enlarged view (c) of the upper part indicated by the arrow D in the same figure, It is a side view (d) of the spacer.

  The present invention relates to an electrolytic cell structure of a diaphragm membrane electrolytic cell. In FIG. 1, the electrolyzed water generating apparatus equipped with the diaphragm membrane electrolyzer which employ | adopted the electrolyzer structure which concerns on this invention is shown. The electrolyzed water generating apparatus is configured by housing the apparatus main body A in a case B. FIG. 1 shows the back side of the apparatus main body A in a state of being taken out from the case B.

  The electrolyzed water generating apparatus is mainly composed of a diaphragm electrolyzer C configured in an electrolyzer structure according to the present invention. As shown in FIG. 2, the diaphragm electrolytic cell C is configured by accommodating a plurality of electrode plate units 10 in a housing 20 in a polymerized state, and inside each electrode plate unit 10 is a pair of electrolytic cells. Chambers (anode-side electrolysis chamber and cathode-side electrolysis chamber) are formed.

  In the electrolyzed water generating apparatus C, an electrolyzed water supply pipe 31 (31a, 31b) is provided at an electrolyzed water introduction port provided at a site below the housing 20 that houses the diaphragm electrolyzer 10. In addition, the outflow pipes 32a and 32b through which the electrolytically generated water flows out are connected to the outlet of the electrolytically generated water provided in the region above the housing 20.

  The electrolyzed water is dilute salt water obtained by diluting high-concentration salt water to a predetermined concentration with raw water, and is constant through a salt water supply line 34 from a salt water tank (not shown) in the middle of the supply line 33 into which the raw water flows. It is prepared in the supply line 33 by continuously supplying a quantity of high-concentration salt water. The prepared electrolyzed water is supplied to the anode-side electrolysis chamber and the cathode-side electrolysis chamber formed in each electrode plate unit 10 through the branch conduit portions 31a, 31b of the supply conduit 31, respectively.

  In the diaphragm electrolyzer C, each electrolyzed water supplied to the anode side electrolysis chamber and the cathode side electrolysis chamber flows upward along the anode side electrode plate and the cathode side electrode plate of the electrode plate unit 10, During this time, the diaphragm is electrolyzed, so that electrolytically generated acidic water is generated in the anode side electrolytic chamber, and electrolytically generated alkaline water is generated in the cathode side electrolytic chamber. The electrolytically generated acidic water generated in the anode side electrolytic chamber and the electrolytically generated alkaline water generated in the cathode side electrolytic chamber flow out from the outlets to the outflow pipes 32a and 32b and are designated in advance. Supplied to the place where it is.

  Therefore, as shown in FIG. 3, the electrode plate unit 10 constituting the diaphragm electrolytic cell C according to the present invention has each side surface of the diaphragm 10c sandwiched between a pair of square frame spacers 10a and 10b. The anode-side electrode plate 10d and the cathode-side electrode plate 10e are respectively arranged on the side while maintaining the intervals defined by the spacers 10a and 10b. However, since the electrode units 10 illustrated in FIG. 3 are used by being superposed on each other and accommodated in the housing 20, the same electrode plate 10 d is used between the electrode plate units 10 adjacent to each other. , 10e are shared with each other.

  As shown in FIG. 4, the spacers 10a and 10b constituting the electrode plate unit 10 are integrated with the diaphragm 10c sandwiched from the left and right, and the diaphragm 10c in the electrode unit 10, the electrode plate 10d, and the diaphragm An anode side electrolysis chamber and a cathode side electrolysis chamber are formed between 10c and the electrode plate 10e. For this reason, in the said diaphragm membrane electrolytic cell 10, since the several electrode plate unit 10 superposed | polymerized and accommodated mutually, it is provided with several pairs of the above-mentioned pair of electrolysis chambers, Are supplied simultaneously to a plurality of pairs of electrolysis chambers to undergo diaphragm electrolysis.

As shown in FIG. 4, the spacers 10 a and 10 b constituting the electrode plate unit 10 are lattice frame bodies having the same configuration and are symmetrical with each other in a state where the diaphragm 10 c is sandwiched. Each of the spacers 10a and 10b, which is a lattice-shaped frame body, includes a rectangular outer frame portion 11 and 12 and a plurality of vertical frame portions 13 extending in the vertical direction within the outer frame portions 11 and 12. .
Each vertical frame portion 13 extends in parallel in the vertical direction while maintaining a predetermined interval between the lower frame portions 11a and 12a and the upper frame portions 11b and 12b constituting the outer frame portions 11 and 12. Step portions 13a and 13b are formed at the upper end portions of the frame portions 13 and 13 (the upper end portion surrounded by the circle indicated by the arrow D in FIG. 4B). As shown in an enlarged view in FIG. 4C, each of the stepped portions 13a and 13b is open to the electrode plates 10d and 10e to be polymerized on the opposite side to the sandwiched diaphragm 10c.

  Further, the outer frame portions 11 and 12 constituting the spacers 10a and 10b are respectively provided with the left frame portions 11c and 12c on the left side in FIG. 4 and the right frame portions 11d and 12d on the right side in FIG. , 12e and fitting recesses 11f, 12f are formed. In the adjacent spacers 10a and 10b of the electrode plate unit 10, the fitting convex portions 11e and the fitting concave portions 11f of the left frame portions 11c and 12c are fitted into the fitting concave portions 11f and 12f of the right frame portions 11d and 12d, and Opposing to the fitting convex portions 11e and 12e, both the spacers 10a and 10b are overlapped with each other.

    On the other hand, the electrode plates 10d and 10e constituting the electrode plate unit 10 have a width dimension that fits just into the outer frame portions 11 and 12 of the spacers 10a and 10b, and step portions 13a and 13b of the vertical frame portions 13 respectively. It is formed in a length dimension that does not reach. In a state where the electrode plates 10d and 10e are fitted in the outer frame portions 11 and 12 of the spacers 10a and 10b, the gap between one side surface of the diaphragm 10c sandwiched between the spacers 10a and 10b and the electrode plate 10d. For example, an anode-side electrolysis chamber is formed, and, for example, a cathode-side electrolysis chamber is formed between the other side surface of the diaphragm 10c and the electrode plate 10e.

The electrode plate unit 10 having such a configuration is accommodated in the housing 20 in a state where a plurality of the electrode plate units 10 are superposed on each other. In the accommodated state, as described above, anode-side electrolysis is performed between one side surface of the diaphragm 10c and the electrode plate 10d constituting each electrode plate unit 10 and between the other side surface of the diaphragm 10c and the electrode plate 10e. An electrolysis chamber comprising a chamber and a cathode side electrolysis chamber is constituted.
Further, as shown in FIG. 4C, the step portions 13a and 13b provided in the vertical frame portions 13 of the adjacent spacers 10a and 10b are opposed to each other in the portion D above each electrolysis chamber. A gap E is formed. The upper ends of the electrolytic plates 10d and 10e do not reach the gap E and are not located in the gap E. The gaps E are arranged in parallel at predetermined positions in the width direction at the upper part in each electrolytic chamber.

  In the diaphragm electrolyzer C according to the present invention having such a configuration, during electrolysis operation, water to be electrolyzed, which is dilute salt water, continues to each electrolysis chamber in each electrode plate unit 10 through the supply pipes 31 (31a, 31b). The electrolyzed water supplied to the electrolysis chambers flows upward along the electrode plates 10d and 10e through the channels defined by the vertical frame portions 13 of the spacers 10a and 10b. . During this time, the electrolyzed water undergoes diaphragm membrane electrolysis in each electrolysis chamber, electrolysis-generated acidic water is generated in the anode-side electrolysis chamber, and electrolysis-generated alkaline water is generated in the cathode-side electrolysis chamber. The generated electrolyzed water flows out to a predetermined location through the outflow pipes 32a and 32b, and is supplied to consumers or drained.

  By the way, in the electrolysis operation of the diaphragm electrolyzer C, the electrolyzed acidic water and the electrolyzed alkaline water are generated synchronously in each electrolysis chamber. At that time, the surface of each electrode plate 10d, 10e is chlorine. Gases such as gas and hydrogen gas are generated. These gases move upward together with each electrolytically generated water flowing upward in each electrolytic chamber. In the conventional diaphragm membrane electrolytic cell, the generated chlorine gas or the like moves upward in each electrolytic chamber and gradually stays in the upper portion.

  On the other hand, in the diaphragm electrolyzer according to the present invention, a plurality of gaps formed by the step portions 13a and 13b of the vertical frame portions 13 constituting the spacers 10a and 10b are formed in the upper portions of the electrolysis chambers. E exists in parallel in the width direction of each electrolytic chamber. For this reason, chlorine gas or the like moving upward in each electrolytic chamber is trapped in each gap E in a concentrated manner. Chlorine gas or the like trapped in each gap E flows out to the outflow pipes 32a and 32b through the outlets along with the electrolyzed water flowing above the electrolysis chambers toward the outlets. And discharged outside the system.

Therefore, in the diaphragm electrolytic cell C according to the present invention, chlorine gas generated in each electrolysis chamber does not stay in a large amount in the upper part of each electrolysis chamber, and each electrolyzed water contains a large amount of chlorine. Without being influenced by gas or the like, the gas can be smoothly introduced into each outlet port and smoothly flowed out through the outflow pipes 32a and 32b.
Moreover, in the said diaphragm membrane electrolytic cell C, since the upper end part of each electrode plate 10d, 10e does not face each gap | interval E, the upper end part of each electrode plate 10d, 10e is received by each gap | interval E, chlorine gas etc. It is possible to more reliably regulate the influence of chlorine gas or the like at the upper end of each electrode plate 10d, 10e, and effectively prevent early corrosion of the electrode plates 10d, 10e. Can do.

  In the diaphragm electrolytic cell C according to the present invention, a plurality of electrode plate units 10 are accommodated in the casing 20 in a state of being polymerized with each other, and the vertical frame portions of the spacers 10a and 10b constituting each electrode plate unit 10 are accommodated. Since the 13 step portions 13a and 13b are positioned to face each other, there is an advantage that a large gap E is formed by the step portions 13a and 13b facing each other and a large amount of generated chlorine gas or the like can be received.

A ... apparatus main body, B ... case, C ... diaphragm cell, D ... upper part, E ... gap, 10 ... electrode plate unit, 10a, 10b ... spacer, 10c ... diaphragm, 10d, 10e ... electrode plate, 11 , 12 ... Outer frame part, 11a, 12a ... Lower frame part, 11b, 12b ... Upper frame part, 11c, 12c ... Left frame part, 11d, 12d ... Right frame part, 11e, 12e ... Fitting convex part, 11f, 12f ... fitting recess, 13 ... vertical frame part, 13a, 13b ... step part, 20 ... housing, 31 (31a, 31b) ... supply line for electrolyzed water, 32a, 32b ... outflow pipe for electrolytically generated water, 33: Raw water supply pipe, 34 ... Salt water supply pipe.

Claims (3)

A diaphragm in a state of being sandwiched by a pair of rectangular frame-like spacers within a predetermined length of a casing having an inlet for electrolyzed water at a lower portion and an outlet for electrolyzed water at an upper portion. One or a plurality of electrode plate units each including an electrode plate on the anode side and an electrode plate on the cathode side, each of which is provided with an interval defined by each spacer on each side surface of the electrode plate, Electrolyzed water flowing into the electrolysis chambers formed by the unit and flowing upward along the electrode plates is subjected to diaphragm electrolysis, and the generated electrolyzed water flows out from the electrolysis chambers through the outlet ports. In the diaphragm electrolytic cell, the spacers extend in parallel while maintaining a predetermined distance from the lower frame portion to the upper frame portion of the rectangular outer frame portion. Lattice frame with multiple vertical frames The upper end portion of each vertical frame portion of the lattice frame is provided with a concave step portion that opens to the opposite side of the diaphragm, and the step portion forms a gap with the opposing member. A plurality of the gaps are juxtaposed in the width direction of the electrolysis chamber, trapping gas generated on the surface of the electrode plate during electrolysis of the diaphragm, and introducing the trapped gas into the outlet port together with electrolyzed water. An electrolytic cell structure of a diaphragm electrolytic cell characterized by functioning as much as possible. It is an electrolytic cell structure of the diaphragm electrolytic cell according to claim 1, wherein the electrode plate constituting the electrode plate unit is formed in a shorter dimension than the spacer, The electrolytic cell structure of a diaphragm membrane electrolytic cell, wherein an upper end portion is avoided from a step portion of a vertical frame portion of the spacer. 3. The electrolytic cell structure of the diaphragm electrolytic cell according to claim 2, wherein a plurality of the electrode plate units are accommodated in a casing in a state of being polymerized to each other, and each of the electrode plates The electrolytic cell structure of a diaphragm membrane electrolytic cell, wherein the step portions of the vertical frame portions of the spacers constituting the unit face each other to form the gap.

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