JP4411092B2 - Feed water preparation device - Google Patents

Description

The present invention relates to a regulating apparatus made for the preparation of feed water supplied through the water supply pipe to the device or equipment to use water.

  Usually, water is continuously supplied to devices and facilities that use water, such as boilers, ice makers, and washing machines, through water supply pipes. In the present invention, water supplied through a water supply pipe to an apparatus or facility that uses water is referred to as supply water. Usually, the supply water has a plurality of types of components (solutes) such as hardness components suitable for the environment. It dissolves at a concentration and maintains a stable aqueous solution state. For this reason, changes in the supply water include changes in the environment in which the supply water is placed such that the solute accumulates at a high concentration or the solubility of the supply water in the solute decreases.

  These changes occur in the water supply pipeline in the middle of supply or in the water system pipeline of the device or equipment when the supply water is continuously supplied to the device or equipment for a long time. When such a change occurs in the supply water, the solute dissolved in the supply water precipitates out of the supply water and settles inside the water supply pipes, water pipes of equipment, equipment, etc. To the inner wall. As a result, water supply pipelines, water supply pipelines such as devices and equipment are contaminated, and the flow resistance of the water supply pipelines and water supply pipelines is increased to reduce the operating efficiency of the devices and equipment, or the devices and equipment The function itself will be degraded.

  For example, for boilers, ice makers, washing machines, etc., tap water, well water, river water, etc. are generally used as supply water, but the supply water has hardness components such as calcium and magnesium. In many cases, it is dissolved in the form of metal ions, and carbonic acid components such as carbon dioxide gas enter and dissolve from the outside air. For this reason, hardness components, such as calcium and magnesium, dissolved in the supplied water react with carbonic acid components entering from the outside air and exist in the form of calcium carbonate and magnesium carbonate. Calcium carbonate and magnesium carbonate have extremely low solubility in water.

  For this reason, when the supply water is supplied to the devices and equipment described above for a long time, the supply water is placed in the water supply pipeline in the middle of supply or in the water system pipeline of the devices and equipment. When a change occurs such that the solute such as hardness component accumulates and the concentration of the solute increases or the solubility of the feed water in the solute decreases due to the change in the solute, the solute easily precipitates from the feed water, Solutes such as hardness components (calcium carbonate and magnesium carbonate) are deposited inside the water supply pipes and the water system pipes such as the above-mentioned devices and equipment, or adhere to the inner wall as scales.

  Suppresses the precipitation of calcium carbonate and magnesium carbonate such as calcium carbonate due to hardness components (calcium, magnesium, etc.) dissolved in the supply water and prevents the occurrence of scale due to calcium carbonate and magnesium carbonate precipitation. As means for performing the above, means for passing the supplied water through a water softener filled with Na-type ion exchange resin and performing soft water treatment, or means for adding calcium lactate to the supplied water and acidifying the supplied water are adopted. It is common.

  Among these means, the former type of scale prevention means requires an Na-type ion exchange resin and requires periodic regeneration of the Na-type ion exchange resin. Further, when the ion exchange capacity of the Na-type ion exchange resin gradually decreases, there is a problem that calcium carbonate and magnesium carbonate are gradually precipitated. Further, in the latter means for preventing the start of scale, since the consumption of calcium lactate is continued, there is a problem that the running cost increases, and when calcium lactate is insufficient, calcium carbonate and magnesium carbonate are gradually precipitated. is there. Furthermore, since the scale start prevention means uses chemicals, there is a risk that health problems may occur when the supplied water is used for beverages.

  In recent years, a new scale generation preventing means has been proposed under the name of “electric deionized water production apparatus” in place of the above-described scale generation preventing means (see Patent Document 1).

  The electric deionized water production apparatus has a special configuration including a demineralization chamber, a concentration chamber, and an electrode chamber formed by filling a gap formed by a cation exchange membrane and an anion exchange membrane with an ion exchanger. Thus, a voltage is applied to the water to be treated supplied to the desalting chamber to electrically treat the water to be treated, and deionized water is generated in the desalting chamber.

  In the electric deionized water production apparatus, during the electrical treatment in the desalting chamber of the water to be treated, the calcium ions and magnesium ions in the water to be treated permeate through the concentrating chamber and circulate and flow through the concentrating chamber. Increases calcium and magnesium ion concentration in water. As a result, there is an inherent problem that calcium carbonate and magnesium carbonate due to calcium ions and magnesium ions are generated as scales in each chamber of the apparatus. For this reason, in the said electrical deionized water manufacturing apparatus, an acidic liquid is added to the circulating concentrated water, the pH is maintained on the acidic side, and the dissolving power with respect to the calcium ion and magnesium ion of concentrated water is raised. This prevents the generation of scales such as calcium carbonate and magnesium carbonate in each chamber of the apparatus.

The scale generation preventing means employed in the electric deionized water production apparatus has a problem that it can be applied only to the deionized water production apparatus having a special and complicated configuration, and the both scale prevention prevention means described above. It includes all the problems that have.
JP-A-11-165177

  The main object of the present invention is to provide a scale generation preventing means that can solve many problems of the above-mentioned respective scale generation preventing means, and supply supplied through a water supply pipe to a device or equipment that uses water. By increasing the solubility of water in a solute such as a hardness component, the object is achieved by preventing the generation of scale due to the solute. Another object of the present invention is to make it possible to produce an aqueous solution that dissolves a solute at a high concentration by adopting the above-mentioned means.

The present invention relates to a regulating apparatus made for the preparation of feed water supplied through the water supply pipe to the device or equipment to use water. The supply water preparation device according to the present invention includes a diaphragm electrolytic cell, a first water supply pipe connected to the anode electrolytic chamber of the diaphragm electrolytic cell and supplying raw water for supply water to the anode electrolytic chamber. A second water supply line connected to the anode-side electrolysis chamber and the cathode-side electrolysis chamber of the diaphragm membrane electrolytic cell and supplying the electrolyzed water generated in the anode-side electrolysis chamber to the cathode-side electrolysis chamber; A third water supply line connected to the cathode side electrolysis chamber of the diaphragm membrane electrolytic cell and supplying the electrolyzed water generated in the cathode side electrolysis chamber to the apparatus or facility, and the second water supply line A first removing means for removing the carbonic acid component from the electrolytically generated water flowing through the second water supply pipe, and a first removing means for removing the carbonic acid component from the outside air intervening in the third water supply pipe. comprising a second removal means, especially the solubility of the hardness components as a result of scale precipitation of preparing high feed water It is an.

In the apparatus for preparing feed water according to the present invention, the main component of the hardness component may be a calcium component and a magnesium component.

Adjustment apparatus made of the supply water according to the present invention, basically, highly soluble in a solute such as hardness components, and generates a feed water capable of dissolving the solute in a high concentration. Supply water that has the property of dissolving solutes such as hardness components at a high concentration shows changes such as accumulation of the solute at a high concentration or a decrease in solubility in the solute due to changes in the environment in which it is placed. However, precipitation of the solute dissolved in the supply water from the supply water is prevented or greatly suppressed.

 As a result, when supplying the supply water to a device or facility that uses the supply water for a long time, the solute in the supply water settles in the water supply pipeline, the water pipeline of the device, equipment, etc. There will be no or near nothing to stick to the wall. For this reason, contamination of water supply pipelines such as solute deposits and adhesion as scales, and water pipelines such as devices and equipment does not occur, and the flow resistance of the water supply pipeline or water pipeline can be increased. There is also no reduction in the operating efficiency of the apparatus or equipment.

  For example, when the supply water is supplied to a boiler, ice making machine, washing machine, etc., even if hardness components such as calcium and magnesium are dissolved in the supply water, these hardness components are in the middle of supply It does not precipitate and precipitate in the form of calcium carbonate, magnesium carbonate or the like in the inside or in the water system pipes such as devices and equipment, and does not adhere as scale.

In engaging Ru adjusting apparatus made to the present invention, particularly, for the preparation of feed water, and electrolysis raw water for supply water at the anode side electrolysis chamber chromatic diaphragm electrolytic cell, the generated electrolyzed water chromatic diaphragm electrolyzer A two-stage electrolysis means for electrolysis in the cathode side electrolysis chamber is employed. For this reason, the prepared feed water is neutral or near-neutral, slightly alkaline, and has highly versatile characteristics that do not cause any trouble for the intended purpose.

In addition, carbon dioxide gas in the air is dissolved in the raw water for supply, and calcium, magnesium, and the like, which are hardness components in the raw water for supply, are mainly dissolved in the form of calcium carbonate, magnesium carbonate, and the like. . When the raw water for supply is treated using the preparation apparatus according to the present invention, calcium carbonate, magnesium carbonate, etc. dissolved in the raw water for supply are converted into calcium hydroxide, magnesium hydroxide, and the like. As a result, the dissolved amount of calcium carbonate, magnesium carbonate, etc. in the prepared feed water is greatly reduced. In other words, the prepared feed water has increased the solubility of calcium carbonate, magnesium carbonate and the like. For this reason, according to the prepared supply water, precipitation as calcium carbonate, magnesium carbonate, etc. which are hardness components, such as calcium and magnesium, can be prevented.

  The present invention relates to a preparation method for preparing supply water to be supplied to a device or facility that uses water through a water supply pipe, and a preparation device for carrying out the preparation method. FIG. 1 schematically shows an embodiment of a preparation apparatus according to the present invention. The said preparation apparatus intends to prepare the feed water which has the characteristic with the high solubility with respect to hardness components, such as calcium and magnesium.

  The preparation apparatus mainly includes a diaphragm membrane electrolytic cell 10 and a carbonic acid component remover 20 or a carbonic acid component remover 30 and is connected to the diaphragm membrane electrolytic cell 10 and the carbonic acid component removers 20, 30 and the like. A first water supply pipe 41, a second water supply pipe 42, and a third water supply pipe 43 are provided. The diaphragm electrolyzer 10 includes a tank body 11, a diaphragm 12 that is disposed in the center of the tank body 11 and divides the interior into two compartments, and is disposed in each compartment, and each compartment is divided into a first electrolysis chamber. It consists of a pair of electrodes 13a and 13b formed in R1 and the second electrolysis chamber R2. In the diaphragm electrolytic cell 10, the first electrolysis chamber R1 is formed in the anode chamber, and the second electrolysis chamber R2 is formed in the cathode chamber.

  In the diaphragm electrolyzer 10, a first water supply pipe 41 is connected to the upstream side of the first electrolysis chamber R1. The first water supply pipe 41 functions as a water supply pipe for supplying tap water, which is raw water for supply water, to the first electrolysis chamber R1. Moreover, in the said diaphragm membrane electrolytic cell 10, the 2nd water supply pipe line 42 is connected to the downstream of 1st electrolysis chamber R1, and the upstream of 2nd electrolysis chamber R2. The second water supply line 42 connects the first electrolysis chamber R1 and the second electrolysis chamber R2 to each other, and the electrolyzed water generated in the first electrolysis chamber R1 is upstream of the second electrolysis chamber R2. It functions as a water supply line to supply to Moreover, in the said diaphragm membrane electrolytic cell 10, the 3rd water supply pipe line 43 is connected to the downstream of 2nd electrolysis chamber R2. The third water supply conduit 43 functions to flow out the electrolytically generated water generated in the second electrolysis chamber R2.

In the diaphragm electrolytic cell 10, carbonic acid component removers 20 and 30 are interposed in the middle of the second water supply pipe 42. The carbonic acid component remover 20 is shown in detail in FIG. 2, and the carbonic acid component remover 30 is shown in detail in FIG. The carbonic acid component removers 20 and 30 correspond to first removing means for removing the carbonic acid component from the electrolytically generated water defined in the present invention. In the middle of the third water supply conduit 43, a second removing means for removing a carbonic acid component from outside air entering the electrolytically generated water defined in the present invention is interposed. As the second removing means, a calcium chloride filled layer 53b shown in FIG. 4, an opening device 55 that accommodates the calcium chloride filled layer, and the like are employed. The second removal means functions to remove the carbonic acid component from the outside air entering the third water supply pipe 43.

  The carbonic acid component remover 20 includes a tank-shaped vessel body 21 that stores the electrolyzed water generated in the first electrolysis chamber R1, a bubbling conduit 22 that blows innumerable bubbles, and gas into the vessel body 21. A lead-out conduit 23 is provided. In the bubbling conduit 22, the distal end portion of the conduit main body 22 a is formed in a bubbling portion 22 b having a number of jets, and the bubbling portion 22 b extends a predetermined length along the bottom in the vessel main body 21. ing. The lead-out conduit 23 faces an upper part in the main body 21 in a state of penetrating the upper wall portion of the main body 21. In the carbonic acid component remover 20, the upstream side pipe part 42 a constituting the second water supply pipe line 42 faces the bottom in the vessel body 21 in a state of passing through the upper wall portion of the vessel body 21, and The downstream side pipe part 42b which comprises the 2nd water supply pipe line 42 has faced the bottom part vicinity in the main body 21 in the state which penetrated the upper wall part of the main body 21. FIG.

  The preparation device prepares supply water using tap water as raw water for supply water. In the preparation apparatus, during operation of the preparation apparatus, tap water is supplied to the first electrolysis chamber R1 of the diaphragm electrolyzer 10 through the first water supply pipe 41, and the tap water supplied to the first electrolysis chamber R1 is The electrolysis chamber R1 is electrolyzed and becomes electrolyzed acidic water. The generated electrolytically generated acidic water is supplied into the main body 21 of the carbonic acid component remover 20 through the upstream water supply passage 42 a constituting the second supply pipe 42, and is decarboxylated in the main body 21. Receive. The electrolytically generated acidic water from which the carbonic acid component has been removed is supplied to the second electrolysis chamber R2 of the diaphragm electrolyzer 10 through the downstream water supply passage 42b constituting the second supply conduit 42. The electrolytically generated acidic water supplied to the second electrolytic chamber R2 undergoes electrolysis in the electrolytic chamber R2 and becomes neutral electrolytically generated water or slightly alkaline electrolytically generated water. The electrolyzed water is supply water intended to be prepared by the preparation device. The supply water is supplied to a device or facility that uses water through the third water supply pipe 43.

Therefore, in the preparation apparatus, tap water is subjected to electrolysis twice in the first electrolysis chamber R1 and the second electrolysis chamber R2 of the diaphragm electrolytic cell 10. As a result, the prepared feed water becomes neutral or slightly alkaline water. In the preparation device, the electrolytically generated acidic water generated in the first electrolysis chamber R1 is subjected to a decarboxylation process in the carbonic acid component remover 20. In the carbonic acid component remover 20, the decarboxylated outside air is introduced into the electrolytically generated acidic water accommodated in the vessel main body 21 through the pipeline main body 22 a of the bubbling pipeline 22. The introduced outside air becomes innumerable bubbles at the bubbling portion 22b and is ejected into the electrolytically generated acidic water. The innumerable bubble-shaped outside air that has been ejected is generated by the bicarbonate ions (HCO ₃ ) generated due to the carbonic acid components dissolved in the electrolytically generated acidic water while moving upward in the contained electrolytically generated acidic water. ^- )) To efficiently convert HCO ₃ ^- to CO ₂ . The converted CO ₂ is in the form of gas and is released to the outside air through the outlet line 23. As a result, the electrolytically generated acidic water accommodated in the vessel main body 21 is supplied with the carbon component to the second electrolysis chamber R2 of the diaphragm electrolyzer 10.

  Therefore, the electrolytically generated water generated in the second electrolysis chamber R2 of the diaphragm electrolyzer 10 becomes the supply water from which the carbonic acid component has been removed. In particular, calcium carbonate and magnesium carbonate resulting from hardness components such as calcium and magnesium dissolved in electrolytically generated acid are converted to calcium hydroxide and magnesium hydroxide. For this reason, even if the supply water contains hardness components such as calcium and magnesium, when the supply water is supplied to equipment and facilities such as boilers, ice makers, and washing machines, these hardness components Precipitation and precipitation in the form of calcium carbonate, magnesium carbonate, or the like in a water supply pipeline in the middle of supply or in an aqueous pipeline such as a device or facility is greatly suppressed. As a result, contamination of the water supply pipelines due to precipitation of calcium carbonate, magnesium carbonate, etc. and adhesion as scales, and water pipelines such as devices and equipment is greatly suppressed, and the flow resistance of the water supply pipelines and water pipelines is reduced. Without increasing the operating efficiency of the apparatus or the equipment.

  In the said preparation apparatus, it can replace with the carbonic acid component removal device 20, and can employ | adopt the 2nd carbonic acid component removal device 30 shown in FIG. The carbonic acid component remover 30 employs a gas suction means instead of the bubbling means employed in the carbonic acid component remover 20. The carbon component remover 30 is disposed in the middle of a tank-shaped vessel body 31, an introduction pipe line 32, a gas lead-out pipe line 33, and a gas lead-out pipe line 33 arranged in a serpentine shape in the container body 31. The vacuum pump 34 is used. The introduction pipe line 32 is made of a porous pipe member through which gas can permeate, and is connected to an upstream water supply path 42a constituting the second water supply pipe line 42 at its upstream end, and At the downstream end, it is connected to a downstream water supply path 42 b that constitutes the second water supply pipe 42.

In the carbonic acid component remover 30, the vacuum pump 34 is driven to bring the inside of the vessel body 31 to a high negative pressure state, and the introduction conduit 32 has a first electrolysis chamber R 1 of the diaphragm electrolyzer 10. The electrolytically generated acidic water generated in step 1 is introduced. Since the introduction pipe line 32 is porous so that gas can permeate, the carbonic acid component dissolved in the electrolytically generated acidic water flowing in the introduction pipe line 32 is gasified into carbon dioxide gas (CO ₂ ) or the like. In the state, it is discharged to the atmosphere through the gas outlet line 33. In addition, HCO ₃ ⁻ in the electrolytically generated acidic water gradually shifts to CO ₂ in order to establish an equilibrium state that supplements the CO ₂ that has been gasified and removed, and the transferred CO ₂ is sucked in the form of a gas, leading to gas derivation. It is released into the atmosphere through the pipe 33. Thereby, the carbonic acid component contained in the electrolytically generated acidic water in the introduction pipe line 32 is removed, and the electrolytically generated acidic water flowing out to the downstream water supply path 42b of the second water supply pipe line 42 contains almost no carbonic acid component. It contains no water. That is, the carbonic acid component remover 30 performs the same function as the carbonic acid component remover 20.

  In this example, the preparation method according to the present invention is performed to prepare a supply water, and the supply water prepared in the preparation experiment and the raw water for supply water are used to supply the supply water. A hardness component precipitation experiment was conducted to confirm the precipitation state of the hardness component.

  The feed water preparation experiment uses a first preparation device equipped with a carbonic acid component remover 20, which is a preparation device shown in FIG. 1, and a second preparation device equipped with a carbonic acid component remover 30. This is the raw water for supply water. Accordingly, the supply water preparation experiment is an electrolysis experiment in which tap water is electrolyzed water and has a predetermined electrolysis strength (electrolysis voltage of 25 V and electrolysis current of 1.2 A). The electrolytically generated water (feed water) generated by the electrolysis experiment is a slightly alkaline electrolytically generated water having a pH in the range of 8-9. M of supply water (test water 1) generated by the first preparation device, supply water (test water 2) generated by the second preparation device, and tap water (test water 3) as raw water for supply water The alkalinity was 5 mg / L, 0.5 mg / L, and 150 mg / L.

The M alkalinity is also called pH 4.8 alkalinity, and carbonic acid such as carbonic acid (H ₂ CO ₃ ), carbonate ion (CO ₃ ^-2 ), hydrogen carbonate ion (HCO ₃ ⁻ ), and hydroxide ion (OH ⁻ ). The amount of the component contained in the sample (water) is displayed. For the measurement of M alkalinity, 0.01N aqueous solution of HCl or H ₂ SO ₄ is used as a standard solution for titration, and methyl red-bromcresol green (MR-BCG) is used as an indicator to determine the titration end point. The pH is 4.8 (gray purple).

  In the hardness component precipitation experiment, a precipitation experiment apparatus shown in FIG. 4 was used. The precipitation experiment apparatus is created by the inventor assuming a supply pipeline for supplying supply water to the apparatus and equipment, and includes a storage tank 51 for storing the introduced test water, and a storage tank. A circulation line 52 connected to 51, and an alkaline water supply device 53 that supplies an aqueous NaOH solution to the circulation line 52 are provided. In the storage tank 51, the tank main body 51a includes an overflow pipe 51b extending through the bottom and extending upward. On the upper wall, an introduction pipe line 54 for introducing test water into the tank main body 51a, and a tank An opening device 55 is provided for communicating the inside of the main body 51a with the outside. Accordingly, the storage tank 51 is configured to always store a predetermined amount of the test water introduced from the introduction pipe line 54.

  The circulation line 52 functions to circulate the test water in the storage tank 51 by driving the circulation pump 56 provided therein. If the test water is continuously circulated, The hardness component gradually precipitates as calcium carbonate or magnesium carbonate. In the circulation pipeline 52, a part of the pipeline main body 52a is formed as a removable connection pipeline 52b. Thereby, the connection pipeline 52b is removed, and the hardness components (calcium carbonate, magnesium carbonate, etc.) deposited in the connection pipeline 52b can be measured.

The alkaline water supply device 53 connected to the circulation line 52 includes a storage tank 53a for an alkaline aqueous solution, a packed bed 53b of calcium chloride (CaCl ₂ ), and a supply pump 53c, and is circulating test water. When the water is tap water, it is operated to supply alkaline water to the tap water circulating through the circulation line 52, thereby adjusting the pH of the tap water to the same pH as that of the other test water. . The packed bed 53b functions to remove CO ₂ gas in the outside air that enters the storage tank 53a. The opening device 55 includes a packed layer of calcium chloride (CaCl ₂ ) and functions to remove CO ₂ gas in the outside air that enters the storage tank 51a. These packed layers correspond to the second removing means for removing the carbonic acid component in the present invention.

  In the hardness component precipitation experiment, test water 1 (supply water 1), test water 2 (supply water 2), and test water 3 (raw water for supply water: tap water) are respectively 100 hours and 500 hours, Experiments were conducted to circulate through the circulation line 52 for 1000 hours and 2000 hours, and the weight of hardness components (calcium carbonate, magnesium carbonate, etc.) deposited in the connection line 52b after being circulated for each time was measured. The obtained results are shown in Table 1.

  Test water 1 (feed water 1) and test water 2 (feed water 2) are both raw water (tap water) used as test water 3, and are subjected to removal of hardness components such as calcium and magnesium. Is not. For this reason, all the test waters 1 to 3 contain the same amount of hardness component. Among these test waters, the test water 1 and the test water 2 have extremely low M alkalinity compared to the test water 3. This is because the test water 1 and the test water 2 have a very low content of carbonic acid components for producing metal carbonates such as calcium carbonate and magnesium carbonate, and therefore, carbonates such as calcium carbonate and magnesium carbonate. It shows high solubility in metal salts.

  In the hardness component precipitation experiment using each test water 1 to 3, in order to prepare feed water 1 (test water 1) and feed water 2 (test water 2), referring to Table 1 showing the results In the raw water for water supply (test water 3), precipitation of metal carbonates such as calcium carbonate and magnesium carbonate in the process of continuous circulation is extremely large, whereas raw water for supply water (test water 3) In the feed water 1 (test water 1) and the feed water 2 (test water 2) prepared using the above, it is confirmed that the precipitation of metal carbonates such as calcium carbonate and magnesium carbonate is extremely small.

It is a schematic block diagram which shows one Embodiment of the preparation apparatus which concerns on this invention. It is a schematic block diagram which shows an example of the carbonic acid component removal machine employ | adopted with the preparation apparatus. It is a schematic block diagram which shows another example of the carbonic acid component remover. It is a typical block diagram of the precipitation experiment apparatus used in the hardness component precipitation experiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Separator membrane electrolytic cell, 11 ... Tank main body, 12 ... Diaphragm, 13a, 13b ... Electrode, R1 ... 1st electrolytic chamber, R2 ... 2nd electrolytic chamber, 20, 30 ... Carbonic acid component removal device, 21 ... Tank shape Main body, 22 ... Bubbling pipeline, 22a ... Body main body, 22b ... Bubbling site, 23 ... Derived pipeline, 31 ... Body main body, 32 ... Introduction pipeline, 33 ... Gas outlet pipeline, 34 ... Vacuum pump, 41 DESCRIPTION OF SYMBOLS ... 1st water supply line, 42 ... 2nd water supply line, 42a ... Upstream side water supply path, 42b ... Downstream side water supply path, 43 ... Water supply line, 50 ... Hardness component precipitation experiment apparatus, 51 ... Storage tank , 51a ... tank main body, 51b ... overflow pipe, 52 ... circulation pipe, 52a ... pipe main body, 52b ... connection pipe, 53 ... alkaline water supply device, 53a ... storage tank, 53b ... packed bed, 53c ... supply pump 54 ... Introduction line, 55 ... Opening device 56 ... circulation pump.

Claims (2)

A preparation device for preparing supply water to be supplied through a water supply pipe to an apparatus or facility that uses water, and is connected to a diaphragm membrane electrolytic cell and an anode side electrolysis chamber of the diaphragm membrane electrolytic cell to supply raw water for supply water to the same anode. The electrolytic water generated in the anode-side electrolysis chamber connected to the first water supply line to be supplied to the side electrolysis chamber, and the anode-side electrolysis chamber and the cathode-side electrolysis chamber of the diaphragm electrolytic cell is A second water supply line to be supplied to the electrolysis chamber; and a third water supply pipe connected to the cathode side electrolysis chamber of the diaphragm electrolyzer and supplying the electrolyzed water generated in the cathode side electrolysis chamber to the apparatus or facility A water supply line, a first removal means for removing a carbonic acid component from the electrolytically generated water flowing in the second water supply line that is interposed in the second water supply line, and the third water supply line. A second removal means for removing the carbonic acid component from the external air that is inserted and invaded; Preparation device feedwater, wherein the solubility of the composed hardness components to prepare a high feed water. 2. The supply water preparation apparatus according to claim 1 , wherein the main components of the hardness component are a calcium component and a magnesium component.

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