JP3641752B2 - Electrolyzed water generator - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus that mainly uses anode water discharged from an anode chamber of an electrolyzed water generating apparatus that uses tap water as raw water. More specifically, the present invention relates to cleaning of deposits on the upper part of the cathode chamber and the cathode chamber discharge tube of such an apparatus and protection of the ORP electrode attached to the anode chamber discharge tube.
[0002]
[Prior art]
In the electrolyzed water generating apparatus shown in FIG. 2, the electrolyzer 1 is divided into a cathode chamber 3 and an anode chamber 4 by a diaphragm 2, and electrodes 5 and 6 are inserted into the husband's chamber to provide raw water such as tap water. Is supplied to the negative anode chamber through the water supply pipes 11 and 12 branched from the water supply pipe 10 after adding a predetermined amount of electrolyte from the electrolyte supply tank 9 to the water supply pipe 10. Raw water such as tap water supplied into the negative anode chamber is electrolyzed by energization of a direct current 7 applied between the electrodes, whereby the cathode water is electrolyzed in the cathode chamber and the anode water is electrolytically generated in the anode chamber. The electrolyzed negative anodized water is discharged from the discharge pipes 13 and 14 of the husband. The anode water discharge pipe 14 is provided with an ORP meter electrode 15 for confirming the ability of the discharged anode water.
[0003]
When a halogen compound such as NaCl or KCl is added to the raw water before supplying the electrolytic cell as an electrolyte at a certain ratio and electrolyzed in the electrolytic cell, the anion constituting the electrolyte moves to the anode chamber. As a result, the anode chamber HClO, ClO ^-, etc., anode water low pH containing plenty anions with disinfecting and sterilizing effect. Since this water has a disinfection and sterilization effect, it is used as cleaning water for disinfection and sterilization.
[0004]
However, in such an apparatus that mainly obtains anode water, cathode water having an extremely high pH is discharged along with the anode water. Although Ca ions exist in raw water such as tap water, Ca ions precipitate as calcium carbonate or calcium hydroxide in a high pH region, and gradually block the upper part of the electrolytic cell, the discharge pipe, and the like.
[0005]
For this reason, it stops the inflow of the electrolyte into the electrolytic cell every time the water is discharged for a certain period of time, and backwashing reverses the direction of the voltage applied to the negative anode, and deposits on the negative electrode and the cathode water in the cathode chamber. The calcium salt is washed and dissolved. As a result, the adhered calcium carbonate and calcium hydroxide are dissolved. However, even if the above cleaning is performed by this method, the region having a small electrolytic current density near the upper portion of the cathode chamber, the cathode discharge tube, and the like are not sufficiently back-washed, and there is a problem that the cleaning effect is difficult to achieve. In addition, if washing is performed only by backwashing, backwashing for a long time must be performed, and the electrolytic current during this time is wasted.
[0006]
During backwashing, the cathode water discharged from the anode chamber exhibits high pH alkalinity. The ORP meter installed in the anode chamber water discharge pipe is a device for measuring the oxidation-reduction potential of low pH acidic water. Since it is formed in an electrode structure suitable for this, it once touches high pH alkaline water. After that, an accurate value is no longer shown, or it takes a long time to show an accurate value. The anodized water user judges the capacity of the anodized water according to the display on the ORP meter. As described above, if the ORP meter display is not correct for a while even after the normal anodic water flows after the backwashing, the anodic water user drains the water discharged during that time. However, the anode water itself has an ORP indication that is not correct, and in fact, there is a possibility that water is discharged in a capacity state, and drainage during that time is wasted.
[0007]
[Problems to be solved by the invention]
Therefore, the present invention provides a chemical solution addition tank between the electrolyte supply tank and the electrolytic tank in an apparatus mainly using anodized water, and stores a chemical agent made of an organic acid in the chemical solution addition tank. At least, while adding an electrolyte to the raw water, supplying the above chemicals to the raw water, the pH of the raw water supplied to the cathode chamber is lowered, and calcium is deposited near the upper part of the cathode chamber and in the cathode discharge tube. It is intended to remove things.
[0008]
In addition, by protecting the ORP meter electrode by lowering the pH of the cathode water discharged from the anode chamber, when the operation is shifted to normal operation, the ORP discharged from the anode chamber is immediately displayed correctly. Is.
[0009]
[Means for Solving the Problems]
The electrolyzed water generating apparatus of the present invention is provided with means for supplying an electrolyte to the raw water supply side of the electrolytic cell, and is divided by an ion-permeable diaphragm, and includes a cathode chamber in which a negative electrode is inserted and an anode chamber in which a positive electrode is inserted. An electrolyzed water generating device that applies direct current voltage between the yin and yang electrodes, continuously electrolyzes the raw water flowing into the electrolytic cell, and determines whether or not the anodic water is suitable for use with an ORP meter disposed in the anodic water discharge pipe. A flow path branched from the raw water supply pipe is provided between the above means and the electrolytic tank, and a chemical supply means is provided in the flow path to supply at least an electrolyte and back the chemical tank, and the chemical supply means The gist is that backwashing is performed in a state in which an organic acid is supplied to the electrolytic cell.
[0010]
[Action]
According to the present invention, the electrolyte is supplied to the raw water during backwashing, and the raw water added with the chemical agent is supplied to the electrolytic cell, so that the area where the electrolysis current density is small in the vicinity of the upper part of the cathode chamber during normal operation and the cathode discharge. Calcium deposits in the tube can be dissolved.
[0011]
Further, the pH of the cathode water discharged from the anode chamber during backwashing is lowered so that the electrodes of the ORP meter disposed in the anode pipe are not damaged.
[0012]
Moreover, during normal operation, cleaning water for disinfection and sterilization can be obtained by adding an electrolyte in the raw water.
[0013]
【Example】
FIG. 1 is an embodiment of the present invention contrasted with FIG. The description of the operation overlapping that in FIG. 2 is omitted.
[0014]
In the figure, 1 is an electrolytic cell, 8 is a valve for opening and closing the inflow of raw water such as tap water, 10 is a water supply pipe through which water mixed with an electrolyte added to the raw water flows from an electrolyte supply tank 9, 11 And 12 are water supply pipes for supplying raw water mixed with the electrolyte to the cathode chamber and the anode chamber of the electrolytic cell, 13 is a discharge pipe for the cathode chamber, 14 is a discharge pipe for the anode chamber, and 15 is a discharge pipe. An ORP meter electrode for confirming the performance of the anode water discharge disposed in the middle of the pipe 14, 16 is disposed between the electrolyte supply tank 9 and the electrolytic tank, and further includes a water supply pipe 17 branched from the water supply pipe 10. An addition cylinder that constitutes a medicine supply means for inserting the medicine through, 18 is an outflow pipe, and 19 is a valve that opens and closes raw water supplied to the medicine.
[0015]
In backwashing, backwashing is performed while adding an electrolyte. When the valve 19 is opened, a part of the raw water flows into the addition cylinder 16 through the water supply pipe 17, and when the medicine is stored in the addition cylinder, the medicine is dissolved and discharged from the outflow pipe 18 through the water supply pipes 11 and 12. Supplied to the electrolytic cell.
[0016]
Since the electrolytic cell is backwashed, a negative and positive voltage is applied to the negative anode with respect to normal operation. For this reason, anode water is generated in the cathode chamber and cathode water is generated in the anode chamber. In backwashing with the valve 8 closed, each generated water stays in the cathode chamber or the anode chamber, and the volume in the chamber is dissolved in the cathode chamber. In backwashing with the valve 8 opened, each generated water is discharged from the cathode chamber and the anode chamber for cleaning.
[0017]
At this time, the chemical added to the cathode chamber can dissolve the deposits of calcium in the area near the upper portion of the cathode chamber having a low electrolytic current density and the cathode discharge pipe formed during normal operation.
[0018]
It is possible to neutralize the cathode water discharged from the anode chamber during backwashing to lower its pH, and to prevent the function of the ORP meter electrode disposed in the anode pipe from being lowered.
[0019]
In addition, the valve | bulb 19 can be removed by putting a chemical | medical agent in an addition cylinder only at the time of backwashing. That is, prior to backwashing, the supply of electrolyte is stopped and the chemical is supplied to the addition cylinder. Then, the chemical is supplied to the electrolytic cell by opening the valve 8 and supplying raw water.
[0020]
Organic acids are used as drugs. Malic acid and succinic acid can be used as the organic acid, but citric acid can be preferably used.
[0021]
The addition cylinder into which the drug is inserted is a hermetically sealed container, and is packed with, for example, the crystalline citric acid before backwashing. Thereby, the said organic acid can be supplied only in the period of backwashing. The supply amount of the medicine can be arbitrarily set according to the size of the addition cylinder.
[0022]
【The invention's effect】
With the configuration of the present invention, an electrolyte is supplied even during backwashing, and a chemical is added to the raw water and supplied to the electrolytic cell. Calcium deposits in the cathode discharge pipe can be dissolved.
[0023]
It is possible to neutralize the cathode water discharged from the anode chamber during the backwashing to lower its pH and prevent in advance the function of the ORP meter electrode disposed in the anode pipe.
[0024]
As a result, it is possible to positively obtain water for sterilization and sterilization by performing electrolysis by adding an electrolyte to the water flowing into the electrolytic cell as desired without performing maintenance for a long period of time.
[Brief description of the drawings]
FIG. 1 is an example of an electrolyzed water generating apparatus according to the present invention.
FIG. 2 is a conventional example of an electrolyzed water generating apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electrolysis tank 9 Electrolyte supply tank 10 Water supply pipe 11 Water supply pipe 12 Water supply pipe 15 Electrode of ORP meter 16 Addition cylinder 18 Outlet 19 Valve

Claims (1)

A means for supplying the electrolyte is provided on the raw water supply side of the electrolytic cell, and a DC voltage is applied between the negative and positive electrodes divided by the ion-permeable diaphragm and between the cathode chamber in which the negative electrode is inserted and the anode chamber in which the positive electrode is inserted. An electrolyzed water generating apparatus for continuously electrolyzing raw water flowing into an electrolytic cell and judging whether or not to use anodic water using an ORP meter disposed in an anodic water discharge pipe, between the above means and the electrolytic cell A flow path branched from the raw water supply pipe is provided, a chemical supply means is provided in the flow path, and at the time of backwashing the electrolytic cell, at least an electrolyte is supplied and an organic acid is supplied from the chemical supply means to the electrolytic cell. The electrolyzed water generating apparatus characterized by performing backwashing in the state which carried out.

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