JP2003285062A - Agricultural water reforming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural water reforming apparatus for performing fertilization of magnesium fertilizer to farmland on a regular basis by a simple operation, and pH keeping in soil of the farmland. <P>SOLUTION: In the apparatus, an electrolytic cell 2 is provided in the way of a conduit 4 for introducing water pressurized to a sprayer 3 for spraying water to farmland 10. A first and a second electrodes 11 and 12 made from Ti-Pt are arranged inside the electrolytic cell 2 so as to oppose each other, and intermediate electrodes 13-15 made from magnesium are arranged between both of the electrodes 11 and 12. The D.C. voltage is applied to between both of the electrodes 11 and 12, and Mg<SP>2+</SP>ions are eluted in the water from the intermediate electrodes. As a result, Mg (OH)2 is produced by reaction of Mg<SP>2+</SP>ions with OH-, and the water inside the electrolytic cell 2 is reformed to alkalinity. The reformed water is sprayed to the farmland 10, as a result, fertilization of the magnesium fertilizer to the farmland 10 and pH keeping in the soil of the farmland 10 are simultaneously and easily performed. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural water reforming apparatus for alkalinely modifying agricultural water sprayed on agricultural land and for fertilizing fermented soil fertilizer.

[0002]

2. Description of the Related Art For example, in a high rainfall area such as Japan, magnesium, which is one of the necessary elements for agricultural crops, is heavily outflowed from the soil, so that it is necessary to apply magnesium fertilizer regularly. In volcanic acidic soils such as Japan, it is necessary to neutralize the soil pH before planting crops, and for example, slaked lime or the like is mixed into the soil.

[0003]

However, in order to continuously maintain the soil pH neutral, there is a problem that a regular mixing operation is required and a great deal of labor is required.

The present invention has been made in view of the above-mentioned problems, and a water reforming device is provided in the middle of a water conduit for agricultural water for spraying water on a farmland, and a magnesium fertilizer can be regularly supplied to the farmland by an easy operation. It is an object of the present invention to provide an agricultural water reforming apparatus capable of effective fertilization and soil pH maintenance.

[0005]

In order to achieve the above object, the present invention employs the following technical means.

The agricultural water reforming apparatus according to claim 1 of the present invention is a sprayer for spraying water on farmland, a water conduit for introducing pressurized water to the sprayer, and a middle of the water conduit. And an electrolyzer into which water to be reformed is introduced, first and second electrodes formed of a conductive metal facing each other in the electrolyzer, and between the first and second electrodes. An intermediate electrode formed of one or more magnesium sheets to be arranged and a voltage applying means for applying a DC voltage to the first and second electrodes are provided, and a DC voltage is applied to the first and second electrodes. The configuration was such that Mg ²⁺ ions were eluted from the intermediate electrode into water. This makes M
The g ²⁺ ion reacts with the OH ⁻ ion in water to form Mg (O
H) ₂ is generated and dissolved in water to reform the water in the electrolytic cell to be alkaline. By spraying this alkaline-modified agricultural water, it is possible to easily apply fertilizer of magnesium fertilizer to agricultural land and maintain pH of soil at the same time.

The agricultural water reforming apparatus according to the second aspect of the present invention has a structure in which the first and second electrodes are made of magnesium. Therefore, the Mg ²⁺ ion can be eluted into the water from the electrode on the side to which the high potential voltage is applied, of the first and second electrodes. As a result, since the total area of the magnesium electrode can be increased, a large amount of Mg ²⁺ ions can be eluted in a short time to reform the water to be alkaline even in a small-volume electrolytic cell.

In the agricultural water reforming apparatus according to the third aspect of the present invention, the first and second electrodes are formed of magnesium, and the intermediate electrode made of magnesium is omitted. As a result, the number of electrodes arranged in the electrolytic cell can be minimized and the electrolytic cell can be downsized.

In the agricultural water reforming apparatus according to the fourth aspect of the present invention, the first and second electrodes are made of a conductive metal other than magnesium, a noble metal, or a noble metal alloy. As a result, when the first and second electrodes are formed of noble metal or noble metal alloy, for example, it is not necessary to replace the first and second electrodes and only the intermediate electrode made of magnesium needs to be replaced. The number of maintenance / inspection man-hours for quality equipment can be reduced.

The agricultural water reforming apparatus according to a fifth aspect of the present invention has a structure in which a plurality of intermediate electrodes are laminated via an electrically insulating spacer. Since the thickness of the intermediate electrode becomes thin as Mg ²⁺ ions are eluted into water, it is necessary to replace the intermediate electrode regularly. By configuring the intermediate electrode as described above, it is possible to replace a plurality of intermediate electrodes at one time, and thus it is possible to reduce man-hours for replacing the intermediate electrode.

In the agricultural water reforming apparatus according to claim 6 of the present invention, the voltage applying means has a first energization mode in which a high potential voltage is applied to the first electrode and a low potential voltage is applied to the second electrode. The second conduction mode in which a low potential voltage is applied to the first electrode and a high potential voltage is applied to the second electrode is alternately switched. In an electrode to which a high potential voltage is applied, Mg ²⁺ ions eluted from the electrode surface and Mg (OH) ₂ generated by OH ⁻ attracted to the anode become concentrated at the electrode surface site and partially reach saturation, Mg (OH) ₂
Is deposited. This precipitation substance makes the elution of Mg from the electrode surface non-uniform, so that the electrode surface becomes rough, that is, cracks or irregularities occur. When the cracks and irregularities develop, the life of the electrode is shortened or minute magnesium pieces are peeled off from the electrode surface. On the other hand, at the electrode to which a low potential voltage is applied, a reaction occurs in which H ⁺ ions receive electrons and become hydrogen gas. Due to such a reaction around both electrodes, Mg
^The reaction in which ²⁺ ions are dissolved in water is accelerated. By switching the polarities of both electrodes before the concentration of Mg ²⁺ , OH ⁻ concentrated on the electrode surface becomes high, M of the electrode surface on the high potential voltage side can be changed.
It suppresses the concentration of g ²⁺ and OH ^{− from} becoming too high,
Roughness of the electrode surface can be prevented.

The agricultural water reforming apparatus according to a seventh aspect of the present invention is configured such that the durations of the first energization mode and the second energization mode are the same. As a result, the surface condition of both electrodes to which a voltage is applied can be made substantially uniform, that is, the amount of magnesium eluted can be made substantially equal to maintain good electrolysis efficiency.

In the agricultural water reforming apparatus according to claim 8 of the present invention, the duration of each of the first energization mode and the second energization mode is the same, and the duration is 0.1 depending on the material of magnesium forming the electrodes. The configuration is set within the range of 10 seconds to 10 minutes. As a result, the surface condition of both electrodes can be reliably maintained in a substantially uniform condition.

The agricultural water reforming apparatus according to claim 9 of the present invention has a structure in which magnesium is a cast material. In the case of a cast material, Mg ²⁺ ion elution occurs uniformly in the electrode, so that each energization time in the above-described first energization mode and second energization mode can be set longer. The longer the energization time in each energization mode, the higher the Mg ²⁺ ion generation efficiency, and therefore the surface conditions of both electrodes can be reliably maintained in a substantially uniform state.

Agricultural water reforming according to claim 10 of the present invention
The device is magnesium, which forms the electrodes
Other than alkaline earth metals other than
It was configured to contain 0.1 to 20% by weight in total. Electric
The composition of magnesium forming the pole is pure magnesium or less.
In addition, it does not significantly accelerate the natural corrosion of magnesium, and
Even if it is an alloy containing elements contained in natural hot springs
good. For example, alkali metals such as sodium and potassium
And strontium, calcium, barium, etc.
Alloys with earth metals are listed. Above all magnesium
In the case of alloys with alkaline earth metals of²⁺I
In addition to on, more alkaline Sr ²⁺Ion, C
a²⁺Ion, Ba²⁺Ions etc. elute at the same time, so water
Can be efficiently modified to be alkaline. Where magnesi
The total content of alkaline earth metals alloyed with um is
0.1 to 20% by weight is preferable. Content is 0.1 weight
If it is less than%, the above-mentioned effect of modifying to alkaline is poor,
On the other hand, if the alloying exceeds 20% by weight, the material becomes brittle.
Therefore, it is not preferable.

According to the eleventh aspect of the present invention, there is provided an agricultural water reforming apparatus in which the alkaline earth metal other than magnesium is calcium. When the magnesium forming the electrode is an alloy with calcium which is an alkaline earth metal, alkaline Ca ²⁺ ions are generated at the same time as Mg ²⁺ ions, so that water can be efficiently reformed to alkaline and applied. Since the voltage can be lowered, there are advantages that power consumption can be reduced and the device can be downsized. Furthermore, when the electrode is manufactured by the casting method, the Mg-Ca alloy has a low risk of burning the alloy during casting, and thus the safety of the process can be significantly improved.

The agricultural water reforming apparatus according to claim 12 of the present invention is provided with pH measuring means for measuring the pH of the reformed water, and the voltage applying means is based on the pH measured by the pH measuring means. The magnesium is a casting material that controls at least one of the amount of electricity and the duration of electricity to maintain the pH of the modified water at a predetermined pH. This makes it possible to maintain the water at a predetermined pH with high accuracy.

According to a thirteenth aspect of the present invention, there is provided an agricultural water reforming apparatus for collecting solid products produced in the electrolytic cell flowing out of the electrolytic cell in the middle of a water pipe between the sprayer and the electrolytic cell. The collecting means is provided. As a result, it is possible to prevent the problem that the water discharge hole of the sprayer located downstream of the collecting means is clogged, and to secure a sufficient amount of water sprayed from the sprayer to the farmland, and the solid product collected by the collecting means. (Mg
(OH) ₂ etc.) can be collected and sprayed on farmland to be effectively used as magnesium fertilizer.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an agricultural water reforming apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view of an agricultural water reforming apparatus of an agricultural water reforming apparatus 1 according to an embodiment of the present invention.

The agricultural water reforming apparatus 1 comprises a sprayer 3 for spraying water on a farmland 10, a water conduit 4 for introducing pressurized water to the sprayer 3, and an electrolysis device provided in the middle of the water conduit 4. Tank 2
First and second electrodes 11 and 1 arranged to face each other in the electrolytic cell 2.
2 and the intermediate electrodes 13, 1 arranged between the first and second electrodes
4 and 15 and a control circuit 5 for applying a voltage to the first and second electrodes 11 and 12. In addition, water conduit 4
Is a first water conduit 41 provided upstream of the electrolysis tank 2 for introducing water into the electrolysis tank 2, and a second water guide pipe 41 provided downstream of the electrolysis tank 2 for guiding the reformed water to the sprayer 3. And a water conduit 42.

In the electrolytic cell 2, as shown in FIG.
The first and second electrodes 11 and 12 made of -Ti alloy are arranged so as to face each other. Further, the intermediate electrodes 13, 14, 15 formed of magnesium casting material are laminated and arranged between the first and second electrodes 11, 12. Here, the intermediate electrodes 13, 14, 15 will be described. The intermediate electrodes 13, 14 and 15 are electrically insulated from each other via the spacers 16 and 17 made of an electrically insulating material, such as resin, and stacked.
Spacers 18 and 19 made of an electrically insulating material, such as resin, are also arranged on the outside of 5. That is, the intermediate electrodes 13, 14, 15 and the spacer 16,
17, 18, and 19 are integrally laminated to form one intermediate electrode unit 20. The intermediate electrode unit 20 is detachably fixed between the first and second electrodes 11 and 12. A first water conduit 41 for introducing water into the electrolysis tank 2 is connected below the electrolysis tank 2, and water reformed by the electrolysis tank 2 is sprayed above the electrolysis tank 2. A second water conduit 42 leading to the vessel 3 is connected.

The end of the first water conduit 41 opposite to the electrolytic cell 2 is, for example, a water pipe (not shown) or a water supply pump (not shown) as a source of pressurized water. It is connected to the discharge side. In the middle of the first water conduit 41, a flow rate adjusting valve 43 for adjusting the flow rate of water flowing into the electrolytic cell 2, that is, the amount of water sprayed from the sprayer 3 to the farmland 10.
Is provided. Further, a flow rate sensor 7 that measures the water flow rate in the first water guide pipe 41 is mounted downstream of the flow rate adjustment valve 43 of the first water guide pipe 41.

A pH measuring means for measuring the pH of the water in the second water conduit 42 is provided in the middle of the second water conduit 42 for guiding the water reformed by the electrolytic cell 2 to the sprayer 3.
The sensor 6 is attached. The pH sensor 6 and the flow rate sensor 7 described above are electrically connected to a control circuit 5 described later. In addition, the pH sensor 6 of the second water conduit 42
A filter 9, which is a collecting means for collecting the solid matter produced in the electrolytic cell 2, is provided on the further downstream side. The product in the electrolytic cell 2, for example, Mg (OH) ₂ is usually dissolved in water, but it may be precipitated for some reason to generate a solid. Since the filter 9 collects the solid matter described above, it is possible to prevent the problem that the water discharge hole (not shown) of the sprayer 3 on the downstream side is clogged. Furthermore, the solid Mg (OH) ₂ collected by the filter 9 can be recovered and used as fertilizer.

The sprayer 3 for spraying water on the farmland 10 is provided with a plurality of nozzles (not shown) which are water discharge ports, and these nozzles can spray water evenly over a wide area of the farmland 10. The injection direction is set to.

Next, the control circuit 5 which is a voltage applying means for applying a DC voltage between the first and second electrodes 11 and 12 will be described. The control circuit 5 is mainly composed of an external power source 21.
Electric power is supplied from (for example, AC 100V which is one of commercial power sources), converted into direct current having a predetermined voltage, and applied between the first and second electrodes 11 and 12.

As shown in FIG. 1, the control circuit 5 has an AC power supply 100, which is an external power source 21, via a main switch 51.
A conversion unit 52 that receives the supply of V and converts it to a direct current of a predetermined voltage, a control unit 53 that is supplied with DC power from the conversion unit 52, and outputs a current control signal to a power supply unit 54 described later,
DC power is supplied from the converter 52 and the controller 53
The first and second electrodes 11, 12 according to the current control signal from
And a power supply unit 54 for controlling the value of the current applied to the space. In the agricultural water reforming apparatus 1 according to one embodiment of the present invention, the conversion unit 52 supplies 5 V DC to the control unit 53 and 36 V DC to the power supply unit 54, respectively. And
The power supply unit 54 applies 36 V as a high potential voltage to one electrode of the first and second electrodes 11 and 12, and applies 0 V as a low potential voltage to the other electrode. Also, the control unit 5
The pH sensor 6 and the flow rate sensor 7 described above are connected to 3. Further, the control unit 53 is connected with a pH setting switch 8 for setting a target pH of the reformed water. That is, the pH setting switch 8 can be operated to arbitrarily set the pH of the reformed water sprayed on the farmland 10. For example, when the pH of the farmland 10 is strongly acidic, the pH of the reformed water can be made strongly alkaline, for example, pH 10.

Next, the operation of the agricultural water reforming apparatus 1 according to one embodiment of the present invention will be described.

When the main switch 51 is closed and the pH setting switch 8 is operated to set the target pH of the reforming water, the control circuit 5 starts its operation.

First, the control unit 53 controls the pH setting switch 8
Based on the target pH, the output signal from the pH sensor 6, and the output signal from the flow rate sensor 7, which are set by, the applied current value between the first and second electrodes 11 and 12 is determined, and the power is supplied as a current control signal. It is output to the unit 54. Power supply 54
Applies 36 V as a high-potential voltage to one of the first and second electrodes 11 and 12 and 0 V as a low-potential voltage to the other, and sets the applied current value between the first and second electrodes 11 and 12. Energization is controlled so that the current value becomes a current value according to the current control signal from the control unit 53.

The amount of the product in the electrolytic cell 2, that is, the amount of Mg (OH) ₂ which is a component for reforming water, is proportional to the magnitude of the current value applied between the electrodes 11 and 12.
That is, the larger the applied current value, the larger the amount of Mg (OH) ₂ produced. Therefore, the control unit 53 controls the target value set by the pH value of the reformed water detected by the pH sensor and the pH setting switch as the flow rate of water flowing into the electrolytic cell 2 detected by the flow rate sensor 7 increases. The larger the difference from the pH value, the larger the applied current value between the electrodes 11 and 12 is controlled.

Here, a method of applying a DC voltage to the first and second electrodes 11 and 12 by the power supply section 54 will be described.
The power supply unit 54 applies 36 V as a high potential voltage to the first electrode 11.
Is applied to the second electrode 12 as a low potential voltage of 0 V
And a second conduction mode in which 0 V is applied as a low potential voltage to the first electrode 11 and 36 V is applied as a high potential voltage in the second electrode 12 are alternately repeated. The energization time in the first energization mode and the energization time in the second energization mode are set to be equal, and the agricultural water reforming apparatus 1 according to the embodiment of the present invention is
In, each is set to 3 seconds. In addition,
FIG. 1 shows a state in the above-described first energization mode, that is, a state in which the first electrode is a positive electrode which is a high potential electrode and the second electrode 12 is a negative electrode which is a low potential electrode.

In the agricultural water reforming apparatus 1 according to one embodiment of the present invention, since the three intermediate electrodes 13, 14, 15 are arranged between the first electrode 11 and the second electrode 12, the first electrode When a voltage V0 is applied between the first electrode 11 and the second electrode 12, a potential difference of V0 / 4 is generated between the adjacent electrodes (since the electrodes are arranged at equal intervals, the spaces between the adjacent electrodes are substantially the same). Filled with a quantity of water, because the electrical resistance between each electrode is almost the same). Thereby, the intermediate electrodes 13, 1
In FIGS. 4 and 15, the surface on the side of the first electrode 11 (left side in FIG. 1) which is a high potential electrode is a low potential electrode, while the surface on the side of the second electrode 12 (right side in FIG. 1) which is a low potential electrode is Functions as a high potential electrode. Therefore, the intermediate electrode 13,
Mg ²⁺ ions are eluted from the surface functioning as the high potential electrode of each of 14 and 15, and the chemical reaction as shown in the following (Chemical formula 1) is caused by the Mg ²⁺ ions and OH ⁻ generated by electrolysis of water. Occurs and Mg (OH) ₂ is produced. This Mg (OH) ₂ is mixed in water and the water in the electrolytic cell 2 is reformed to be alkaline.

[0034]

[Chemical Formula 1] Mg ²⁺ + 2OH ⁻ → Mg (OH) _{2 When a} DC voltage is applied between both electrodes 11 and 12, and the chemical reaction in the electrolytic cell 2 promotes the reforming of the water to alkaline, the reformed water The pH value gradually increases, and the pH of the water near the pH sensor 6 is set in advance by the pH setting switch 8.
When it approaches, the control unit 53 detects it and outputs a current control signal to the power supply unit 54 so as to reduce the applied current value between the electrodes 11 and 12. As a result, the electrolytic cell 2
The amount of Mg (OH) ₂ generated inside is reduced, and the pH of the reformed water in the agricultural water reforming apparatus 1 can be controlled with high precision.

In the agricultural water reforming apparatus 1 according to the embodiment of the present invention described above, a magnesium pipe is provided in the middle of the water conduit 4 for introducing the pressurized water to the sprayer 3 for spraying water on the farmland 10. The electrolytic cell 2 provided with the intermediate electrodes 13, 14, 15 and the like is provided, and Mg (OH) 2 generated in the electrolytic cell 2
₂ the water in the electrolytic cell 2 modified alkaline with, are sprayed with the modified water from the dispenser 3 to the land 10. This makes it possible to easily apply magnesium fertilizer to the farmland 10 and maintain the soil pH at the same time.

Further, in the agricultural water reforming apparatus 1 according to one embodiment of the present invention, the first electrode 11 and the second electrode 12 are provided.
Were formed of Pt-Ti alloy which is a noble metal alloy.
As a result, the functions of both electrodes 11 and 12 are stably maintained, there is no need to replace both electrodes 11 and 12, and only the intermediate electrode made of magnesium needs to be replaced. Can be reduced.

Further, in the agricultural water reforming apparatus 1 according to one embodiment of the present invention, the electrically insulating spacers 16 and 1 are provided.
The intermediate electrodes 13, 14, 15 are laminated in multiple layers via 7, 18, 19 to form one intermediate electrode unit 20. As a result, the Mg ²⁺ from the intermediate electrodes 13, 14, 15
When the ions are eluted in water and the thickness thereof becomes thin and the intermediate electrodes 13, 14, 15 are regularly replaced, only one intermediate electrode unit 20 needs to be replaced, so that the number of replacement work steps is reduced. be able to.

Further, in the agricultural water reforming apparatus 1 according to one embodiment of the present invention, a high potential voltage (3
6 V) and a low potential voltage (0
V) is applied to the first energization mode and the first electrode 11 is applied with a low potential voltage (0V) and the second electrode 12 is applied with a high potential voltage (36V). Energization is performed, and the energization time in the first energization mode and the energization time in the second energization mode are set to be equal. This suppresses the concentration of Mg ²⁺ , OH ^{− on} the surface of the high-potential voltage side electrode of each of the intermediate electrodes 13, 14 and 15 from becoming excessively high, thereby preventing the electrode surface from being roughened and at the same time, It is possible to maintain good electrolysis efficiency by making the elution amounts of magnesium on the front and back surfaces of each of Nos. 14, 14 and 15 substantially equal.

Further, in the agricultural water reforming apparatus 1 according to one embodiment of the present invention, the intermediate electrodes 13, 14 and 15 which are magnesium electrodes are formed of magnesium casting material. In the case of the cast material, since the Mg ²⁺ ion elution is uniformly ^generated in the electrode, it is possible to set each energization time in the first energization mode and the second energization mode longer, whereby the Mg ²⁺ ion It is possible to maintain good production efficiency.

Further, in the agricultural water reforming apparatus 1 according to one embodiment of the present invention, the pH sensor 6 is provided, and the pH value of the reforming water detected by the pH sensor 6 is set in advance by the pH setting switch 8. Both electrodes 11,
The applied current value between 12 is controlled. Thereby, the pH of the reforming water can be easily controlled as needed.
In addition, due to the solubility characteristics of Mg (OH) ₂ in water, p
Since it does not exceed H10.5 and is self-adjusted, the pH of the reforming water
Is 10.5 at maximum. Therefore, the pH value that can be set by the pH setting switch 8 is in the range of pH 10.5 or less.

In addition, in the agricultural water reforming apparatus 1 according to one embodiment of the present invention, an electrolytic cell that flows out from the electrolytic cell 2 in the middle of the sprayer 3 and the second water conduit 42 that is connected to the electrolytic cell 2. 2 produced solid, ie solid Mg (OH)
_A filter 9, which is a collecting means for collecting _{2 and the} like, is provided.
As a result, it is possible to prevent the problem that the water discharge hole of the sprayer 3 is clogged, to ensure a sufficient amount of water sprayed from the sprayer to the farmland, and to prevent the generated solid matter (Mg
(OH) ₂ etc.) can be collected and sprayed on farmland to be effectively used as magnesium fertilizer.

In the agricultural water reforming apparatus 1 according to the embodiment of the present invention described above, the first electrode 11,
And the second electrode 12 is made of a noble metal alloy, that is, Pt-Ti.
Although they are made of alloy, they may be made of magnesium. In this case, the Mg ²⁺ ions are also dissolved from the first electrode 11 and the second electrode 12, so that the total area of the magnesium electrode can be made large, and water can be alkalified in a short time even in a small-volume electrolytic cell. be able to. Further, the first electrode 11 and the second electrode 12 may be formed of magnesium, and the intermediate electrodes 13, 14, 15 may be omitted. In this case, the electrolytic cell 2 can be downsized by minimizing the number of electrodes arranged in the electrolytic cell 2.

In the agricultural water reforming apparatus 1 according to the embodiment of the present invention described above, the magnesium electrodes, that is, the intermediate electrodes 13, 14 and 15 are made of pure magnesium (a magnesium material having a purity of 99.9%). However, instead of this, an alloy containing 5% by weight of calcium (produced by gravity forging) in magnesium may be used. In this case, alkaline C at the same time as Mg ²⁺ ions
Since a ²⁺ ions are generated, water can be efficiently modified to be alkaline. Also, since the voltage applied to the electrodes can be lowered,
The power consumption can be reduced and the device can be downsized. Furthermore, when the electrode is manufactured by the casting method, the Mg-Ca alloy has a low risk of burning the alloy during casting, and thus the safety of the process can be significantly improved.

Further, in the agricultural water reforming apparatus 1 according to the embodiment of the present invention described above, 100 V AC is used as the power source 21 for operating the control circuit 5.
Other types of power sources, such as 200 V AC, storage batteries, solar cells, wind power generators, etc. may be used.

Further, at least one of the pH sensor 6, the flow rate sensor 7, the pH setting switch 8 and the filter 9 in the agricultural water reforming apparatus 1 according to the embodiment of the present invention described above is used as the agricultural water reforming apparatus. It may be omitted depending on the usage condition of 1.

FIG. 2 shows an explanatory view of the electrode arrangement in the electrolytic cell 2 in the modified example of the agricultural water reforming apparatus 1 according to one embodiment of the present invention. In this modification, the first electrode 1
1 or the second electrode 12 (in FIG. 2,
One first electrode 11) is added and one intermediate electrode unit 20 is added. As a result, the total area of the magnesium electrode can be increased and the water can be reformed to alkaline in a short time even in a small-volume electrolytic cell. In this case, the first electrode 11 and the second electrode 12 are, for example, P
It may be formed of either a noble metal alloy such as a t-Ti alloy or magnesium.

FIG. 3 is an explanatory view of the electrode arrangement in the electrolytic cell 2 in another modified example of the agricultural water reforming apparatus 1 according to one embodiment of the present invention. In this modified example, the intermediate electrode unit 20 in the modified example shown in FIG. 2 is eliminated. That is, as shown in FIG.
Two first electrodes 11 and one second electrode 12 are arranged therein. In this case, both the first electrode 11 and the second electrode 12 may be made of magnesium. Alternatively, one of the first electrode 11 and the second electrode 12 is made of magnesium and the other is made of a conductive metal other than magnesium, for example,
You may form with a Pt-Ti alloy.

In the agricultural water reforming apparatus 1 according to the embodiment of the present invention described above, and its modified example, the first electrode 11, the second electrode 12 and the intermediate electrode 13 to 13 are formed.
Although the shape of 15 is a plate shape, it is not limited to a plate shape and may be another shape. For example, it may have a spiral shape.

[Brief description of drawings]

FIG. 1 is an agricultural water reforming apparatus 1 according to an embodiment of the present invention.
FIG.

FIG. 2 is an agricultural water reforming apparatus 1 according to an embodiment of the present invention.
FIG. 11 is an explanatory view of the electrode arrangement in the electrolytic cell 2 in the modification example.

FIG. 3 is an agricultural water reforming apparatus 1 according to an embodiment of the present invention.
The explanatory view of the electrode arrangement in the electrolysis tank 2 in another modification of is shown.

[Explanation of symbols]

1 Agricultural water reformer 2 electrolysis tank 3 spreaders 4 water conduit 41 First water conduit 42 Second water conduit 5 Control circuit (voltage application means) 51 Main switch 52 converter 53 Control unit 54 power supply 6 pH sensor (pH measuring means) 7 Flow rate sensor 8 pH setting switch 9 Filter (collection means) 10 farmland 11 First electrode 12 Second electrode 13, 14, 15 Intermediate electrode 16, 17, 18, 19 Spacer 20 Intermediate electrode unit 21 power supply

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 1/68 530 C02F 1/68 530A 540 540E F term (reference) 4D061 DA02 DB09 EA02 EB01 EB04 EB21 EB30 EB31 EB39 GC12 GC14 GC15

Claims (13)

[Claims] 1. A sprayer for spraying water on farmland, a water conduit for introducing pressurized water to the sprayer, and an electrolyzer provided in the middle of the water conduit for introducing reforming water. , First and second electrodes made of a conductive metal and facing each other in the electrolytic cell, and one or more intermediate electrodes made of magnesium and placed between the first and second electrodes And a voltage applying means for applying a DC voltage to the first and second electrodes, and applying a DC voltage to the first and second electrodes to dissolve Mg ²⁺ ions in water from the intermediate electrode. An agricultural water reforming device, which reforms water in an electrolytic cell to be alkaline. 2. The agricultural water reforming apparatus according to claim 1, wherein the first and second electrodes are made of magnesium. 3. The agricultural water reforming apparatus according to claim 2, wherein the intermediate electrode is eliminated. 4. The agricultural water reforming apparatus according to claim 1, wherein the first and second electrodes are formed of a conductive metal other than magnesium, a noble metal, or a noble metal alloy. 5. The agricultural water reforming apparatus according to any one of claims 1, 2 and 4, wherein a plurality of the intermediate electrodes are laminated via an electrically insulating spacer. 6. The voltage applying means applies a high potential voltage to the first electrode and a low potential voltage to the second electrode, and a low potential voltage to the first electrode. At the same time, the agricultural water reforming apparatus according to any one of claims 1 to 5, wherein the second energization mode in which a high potential voltage is applied to the second electrode is alternately switched. 7. The agricultural water reforming apparatus according to claim 6, wherein the durations of the first energization mode and the second energization mode are the same. 8. The duration of each of the first energization mode and the second energization mode is set to 0.1 second to 10 minutes depending on the material of magnesium forming the electrode. Item 6. The agricultural water reforming apparatus according to Item 6 or 7. 9. The agricultural water reforming apparatus according to claim 8, wherein the magnesium is a cast material. 10. The magnesium content of one or more alkaline earth metals other than magnesium is 0.1 wt% to 20 wt% in total. The agricultural water reforming apparatus according to any one of 1. 11. The agricultural water reforming apparatus according to claim 10, wherein the alkaline earth metal other than magnesium is calcium. 12. A pH measuring means for measuring the pH of the reformed water is provided, and the voltage applying means controls at least one of an energizing amount and an energizing time based on the pH measured by the pH measuring means. The agricultural water reforming apparatus according to any one of claims 1 to 11, wherein the pH of the reformed water is maintained at a predetermined pH. 13. A collecting means for collecting solids produced in the electrolytic cell flowing out of the electrolytic cell is provided in the water conduit between the sprayer and the electrolytic cell. The agricultural water reforming apparatus according to any one of claims 1 to 12.