JP2015087117A - Water modification effect determination device and water modification effect determination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water modification effect determination device and a water modification effect determination method, capable of easily determining that a water quality is kept modified.SOLUTION: There is provided a water modification effect determination device that includes: a first corrosion sensor having a stainless steel cathode and an iron anode, and being immersed in water before treatment which is to be supplied to a water treatment device; a second corrosion sensor having a stainless steel cathode and an iron anode, and being immersed in water after treatment which is discharged from the water treatment device; comparison means for comparing a current value A outputted from the first corrosion sensor and a current value B outputted from the second corrosion sensor; and determination means for discriminating a fact that a period is kept in which the current value A is larger than the current value B and determining that the water modification effect is maintained. Further there is provided a water modification effect determination method, which determines that the water modification effect is maintained, by discriminating the fact that the period is kept in which the current value A is larger than the current value B.

Description

  The present invention relates to a water reforming effect determination device and a water reforming effect determination method, and more particularly, easily determines that the water quality reforming of tap water is improved to have a rust-proofing water quality. The present invention relates to a water reforming effect determination device and a water reforming effect determination method that can be performed.

  Various treatment apparatuses are used as water treatment apparatuses for reforming water by purifying water using ceramics that emits far infrared rays. When the water reforming situation in these water treatment devices is grasped and it is found that the water reforming function of the water treatment device is lowered, it is necessary to quickly take a function recovery measure of the water treatment device.

  There are water treatment devices that use hybrid ceramics as water modifiers. This water treatment apparatus is commercially available, for example, from Urban Expansion Co., Ltd. under the name “The Bio Water” (registered trademark). The hybrid ceramic is a special ceramic that is fired at a firing temperature of 1300 ° C. or higher, has a hardness of 7 or higher, and has an integrated emissivity of far infrared rays of 4.4 to 15.4 μm of 92% or higher. The treated water obtained by treating the water with "The Bio Water" is said to be "highly functionalized by changing the physical properties of the water itself without adding or adding any components from the tap water" (Http://www.biowater.co.jp/product/index.html). If treated water with such high functionality is used in factories, residential buildings, commercial buildings, etc., “1. Measures against red rust degradation can be made inexpensively. 2. Scale (a lump of calcium or silica adhering to equipment) can be taken. Therefore, the maintenance and management of the equipment such as the boiler becomes easier and the equipment itself lasts longer.

  As an apparatus for measuring a water reforming function in a water treatment apparatus, Patent Document 1 describes “a treatment liquid chamber for introducing water treated by a water treatment apparatus and a water treatment apparatus in an apparatus for grasping an operation state of the water treatment apparatus” The pre-treatment liquid chamber into which water before treatment is introduced is partitioned and coupled by a coupling portion provided with a neutral film, and an openable and closable inlet liquid stopper is provided at the inlet of the treatment liquid chamber. The outlet is provided with an openable / closable outlet liquid stopper, the inlet of the pre-treatment liquid chamber is provided with an openable / closable inlet liquid stopper, and the outlet of the pre-treatment liquid chamber is provided with an openable / closable outlet liquid stopper. The treatment liquid chamber has a measurement cell provided with a detection electrode and the pre-treatment liquid chamber with a comparison electrode. A device that grasps the operational status of a water treatment device, characterized by being connected "( See claim 1 of Patent Document 1) is disclosed.

  In the measuring apparatus described in Patent Document 1, “having the measuring cell 2, the measuring cell is made of a glass material such as borosilicate glass, and the like, and the processing liquid chamber 3 and the pre-processing liquid chamber 4 are connected by the coupling portion 5. A neutral film 6 is attached to the coupling portion 5 to prevent the treatment liquid 7 from mixing with the pretreatment liquid 8 and to allow electrochemical measurement between the two chambers ”(patent (Refer to paragraph No. 0010 of Document 1), “the detection electrode 11 is provided in the treatment liquid chamber 3, and the comparison electrode 12 is provided in the pre-treatment liquid chamber 4, and the detection electrode 11, The reference electrode 12 has a configuration that is coupled to the voltage / current measuring means 13 ”(see paragraph number 0013 of Patent Document 1). As a specific example of the detection electrode 11 and the comparison electrode 12, a “carbon rod having a diameter of 2 mm and a wetted part length of 30 mm” (see paragraph number 0021 of Patent Document 1) is shown.

Japanese Patent No. 3,835,761

  The subject of this invention has the structure different from the apparatus described in the said patent document 1, and the improvement effect of the antirust function or the antirust effect which the treated water modified | reformed with the water treatment apparatus has is maintained. It is an object of the present invention to provide a water reforming effect determination device and a water reforming effect determination method that can easily determine whether or not the water has been removed.

Means for solving the problems are as follows:
(1) a first corrosion sensor having a cathode electrode made of stainless steel and an anode electrode made of iron and immersed in water before water treatment supplied to the water treatment device;
A second corrosion sensor having a cathode electrode made of stainless steel and an anode electrode made of iron and immersed in water after water treatment discharged from the water treatment device;
A comparison means for comparing the corrosion current value A output from the first corrosion sensor with the corrosion current value B output from the second corrosion sensor;
A water reforming effect determination, comprising: a determination unit that determines that the water reforming effect is maintained by determining that a period in which the corrosion current value A is greater than the corrosion current value B continues. Device,
(2) The water treatment device is a device for reforming water by bringing water before treatment into contact with a hybrid ceramic that radiates 4.4 to 15.4 μm of far infrared rays at an integral emissivity of 92% or more. The water reforming effect determination device according to (1),
(3) A first corrosion sensor having a cathode electrode formed of stainless steel and an anode electrode formed of iron is immersed in water before water treatment supplied to the water treatment device,
A second corrosion sensor having a cathode electrode formed of stainless steel and an anode electrode formed of iron is immersed in water after water treatment discharged from the water treatment device,
It is determined that the water reforming effect is maintained by determining that the period during which the corrosion current value A output from the first corrosion sensor is greater than the corrosion current value B output from the second corrosion sensor continues. This is a water reforming effect determination method.

  According to this invention, the water treatment for reforming tap water into water having a rust prevention function by comparing the corrosion current A output from the first corrosion sensor with the corrosion current B output from the second corrosion sensor. It is possible to provide a water reforming effect determination device and a water reforming effect determination method that can easily determine that the reforming effect of water treated by the apparatus is maintained.

FIG. 1 is a principle explanatory view showing a first corrosion sensor and a second corrosion sensor. FIG. 2 is a longitudinal sectional view showing a specific example of the corrosion sensor. FIG. 3 is a bottom view showing the bottom surface of the tip of the corrosion sensor. FIG. 4 is a schematic explanatory view showing a mounting socket to which a corrosion sensor is attached. FIG. 5 is a schematic block diagram showing a water reforming effect determining apparatus as an example of the present invention. FIG. 6 is a schematic explanatory view showing a position where the corrosion sensor is attached. 7A and 7B are explanatory views showing a corrosion sensor used in the embodiment, wherein FIG. 7A is a top view showing an upper end surface of the corrosion sensor, and FIG. 7B is a longitudinal section appearing when the corrosion sensor is cut along its axis. It is a figure, (c) is a bottom view which shows the bottom face of a corrosion sensor. FIG. 8 is a graph showing the change with time of the corrosion current detected by the corrosion sensor.

  The water reforming effect determination device and the water reforming effect determination method according to the present invention use the first corrosion sensor and the second corrosion sensor.

  Both the first corrosion sensor and the second corrosion sensor have the same structure. As shown in FIG. 1, the first corrosion sensor and the second corrosion sensor include a cathode electrode 5A formed of stainless steel and an anode electrode 4A formed of iron. The cathode electrode 5A and the anode electrode 4A are connected to an ammeter 12A.

  Examples of the stainless steel forming the cathode electrode include martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, austenitic / ferritic duplex stainless steel and precipitation hardened stainless steel, and SUS201, 202, Examples include SUS301 to 305, 316, 317, SUS329J1, SUS403, 405, 420, 430, 430LX, and SUS630.

  As iron forming the anode electrode, for example, iron of the same material as a ductile cast iron pipe or a carbon steel pipe for water supply piping can be used. Ductile iron or carbon steel for water pipes is preferably used for water pipes. Therefore, it is preferable that the anode electrode for detecting rust generated in the water pipe is made of ductile cast iron or carbon steel for water pipe.

  Corrosion reactions that occur in water pipes are often local reactions. Part of the water pipe becomes the anode, the part close to the anode becomes the cathode, and corrosion proceeds at the part that becomes the anode. When a site that becomes an anode once occurs in the water pipe, rust bumps are generated at the site, and corrosion progresses with time, and a through hole may be formed in the water pipe.

  The following electrochemical reaction proceeds with corrosion (http://en.wikipedia.org/wiki/%E9%8C%86).

Anode region: Fe → Fe ²⁺ + 2e ⁻ (1)
Cathode site: O ₂ + 2H ₂ O + 4e ⁻ → 4OH ⁻ (2)
In both the first corrosion sensor and the second corrosion sensor, when the first corrosion sensor and the second corrosion sensor are immersed in tap water, the reaction of the above (1) proceeds in the anode electrode that is iron, and is stainless steel. The reaction (2) proceeds at the cathode electrode, and current flows from the anode electrode to tap water, from the tap water to the cathode electrode, from the cathode electrode to the ammeter through the electric wire, and from the ammeter to the anode electrode through the electric wire.

  In the treated water treated so that the tap water has a rust prevention effect, corrosion of the water pipe is suppressed. Incidentally, since the corrosion current is proportional to the amount of corrosion, that is, the degree of corrosion, a small measured corrosion current means a small amount of corrosion. Therefore, if corrosion in the water pipe is suppressed, the amount of current measured is small. If corrosion in the water pipe is ongoing, the amount of current measured will be large.

  The present invention utilizes this tendency.

  A specific example of the first corrosion sensor and the second corrosion sensor (both may be referred to as “corrosion sensor”) is shown in FIG.

  The corrosion sensor 1 includes an iron plate 4 serving as an anode electrode and a stainless steel plate 5 serving as a cathode electrode disposed in a case 2 having both ends opened, for example, a synthetic resin pipe 2 made of vinyl chloride resin, with a spacer 3 interposed therebetween. The collating electrode 6 is disposed between the stainless steel plate 5 and the inner wall surface of the pipe 2. The space inside the pipe 2 is filled with a synthetic resin 8, and the iron plate 4, the stainless steel plate 5, and the verification electrode 6 disposed inside the pipe 2 are fixed.

  As shown in FIG. 3, in the corrosion sensor 1, end faces of the iron plate 4, the stainless steel plate 5, and the verification electrode 6 are exposed at one end opening of the pipe 2.

  In FIG. 2, reference numeral 7 denotes a lead wire, and the other end of each of the iron plate 4 and the stainless steel plate 5 protrudes from the other end opening of the pipe 2 and is connected to a lead wire (not shown). . The lead wire 7 and the lead wire (not shown) are connected to an ammeter.

  In this example, the pipe 2 is designed to have an outer diameter of 32 mm, an inner diameter of 25 mm, and an axial length of 40 mm. The iron plate 4 and the stainless steel plate 5 protrude from the other end of the pipe 2 by 5 mm. These dimensions are examples, and the dimensions of the corrosion sensor 1 in the present invention are not limited to these values, and can be appropriately changed in design.

  The corrosion sensor 1 according to the present invention may be installed directly on a flow pipe, for example, a water pipe, through which water needs to be inspected for a rust prevention effect, or attached to a branch pipe branched from the water pipe. You may attach to the mounting socket with which the water tap socket is mounted | worn.

  As shown in FIG. 4, the faucet socket 9 has one end opening 9A into which one end of the PVC pipe 10A can be inserted and the other end opening 9B into which one end of another PVC pipe 10B can be inserted. And a cylindrical portion 9E that rises in a cylindrical shape from an end edge portion of a through hole 9D provided at a substantially central portion of the tubular main body 9C and opens at one end.

  The mounting socket 11 includes a cylindrical body 11B having a mounting through hole 11A for mounting the corrosion sensor 1 therein, a flange portion 11C having a larger diameter than the cylindrical body 11B, and the cylindrical body 11B of the flange portion 11C. And an insertion cylindrical body 11D extending on the opposite side. The outer diameter of the mounting through hole 11A is designed so that the mounting through hole 11A provided in the cylindrical body 11B can accommodate the pipe 2 of the corrosion sensor 1 in a liquid-tight manner. The outer diameter of the insertion cylindrical body 11D can be determined so that the insertion cylindrical body 11D can be fitted to the cylindrical portion 9E.

  As shown in FIG. 5, the water reforming effect determination device 15 according to the present invention is discharged from the first corrosion sensor 1 </ b> A immersed in the water before water treatment supplied to the water treatment device and the water treatment device. A second corrosion sensor 1B immersed in the water after the water treatment, an ammeter 12A for measuring a current passed through the first corrosion sensor 1A, that is, a corrosion current and outputting it as a corrosion current value A; The current meter 12B that measures the current passed through the corrosion sensor 1B, that is, the corrosion current and outputs it as the corrosion current value B is compared with the corrosion current values output from the ammeter 12A and the ammeter 12B. It has a comparator 14 that is a comparison unit that outputs a comparison result, and a determination unit 13 that is a determination unit that determines a change in water quality based on an output value output from the comparator 14.

  The determination unit 15 maintains the water quality by determining that there is a period in which the corrosion current value A is greater than the corrosion current value B after the period in which the corrosion current value B is greater than the corrosion current value A has elapsed. Is determined.

The period in which the corrosion current value B is larger than the corrosion current value A occurs because the corrosion current varies due to variations in the surface state of iron, and a stable rust film, that is, black rust or the like is formed on the steel material surface. This is because it takes about 48 hours to complete. As a result of observing the surface of iron by the inventors, the following knowledge was obtained. When water comes into contact with the polished iron surface having metallic luster, very small micro-corrosion is locally generated in the initial stage of water contact, and small spot-like red rust is observed. As the time of water contact elapses, new red rust spots increase and the area of the spots that have already occurred increases. The number of spots and the area of the spots generated in this way affect the corrosion current value. The larger the total area of the spots, the greater the corrosion current value. However, when the area of the corroded portion due to red rust increases and a film mainly composed of red rust adheres to some extent, the movement of the substance accompanying the corrosive reaction is hindered in the corroded portion. However, the corrosion film of iron placed in tap water is not dense and has cracks and cracks. Tap water penetrates through cracks and cracks in the corrosion film and red rust is further generated. However, the treated tap water subjected to the rust prevention treatment turns the red rust on the iron surface into black rust and promotes densification of the rust to suppress the corrosion reaction. Therefore, the corrosion current value that has increased over time due to the occurrence of red rust starts to decrease due to the occurrence of black rust and the like.
The period (1) in which the corrosion current value B is larger than the corrosion current value A continues for 5 to 24 hours. Further, during the period (2) from 29 hours to 48 hours after the period (1) when the corrosion current value B is larger than the corrosion current value A, the corrosion current value B and the corrosion current value A are substantially the same value. May be. The period (C) in which the corrosion current value A is greater than the corrosion current value B after the period (1) when the corrosion current value B is greater than the corrosion current value A or after the period (2) has elapsed. ) Occurs.

  When the determination unit 15 detects the occurrence of the period (C), the determination unit 15 determines that the water after the water treatment discharged from the water treatment device exhibits a rust prevention effect.

  As shown in FIG. 6, the first corrosion sensor 1 </ b> A in the water reforming effect determination device 15 according to the present invention is mounted on the upstream side of the water treatment device 18 mounted on a water pipe 17 that circulates tap water, for example. The second corrosion sensor 1B is attached to the downstream side of the water treatment device 18 in the water pipe 17. The first corrosion sensor 1A attached to the water pipe 17 may be a single unit or a plurality of units. Similarly, the second corrosion sensor 1B attached to the water pipe 17 may be one or a plurality of sensors.

  Examples of the water treatment apparatus include an apparatus having a hybrid ceramic disposed in a water passage, and “The Biowater (registered trademark)” (http: //www.biowater) manufactured by Urban Expansion Co., Ltd. .co.jp /) can be used.

  The hybrid ceramic is a ceramic that radiates 4.4 to 15.4 μm of far-infrared rays with an integral emissivity of 92% or more. When tap water is treated with this hybrid ceramic, “life activation power”, “antibacterial power” , "Antioxidant power", "Detergent power", "Environmental cleansing power" and "Modification sustainability" One or more of six reforming effects are achieved (http://www.biowater.co.jp) /).

(Experimental example 1)
Six 1000 mL tap water and six hybrid ceramics (13.5φ × 19 mm) loaded in “The Bio Water” were placed in a 1000 mL beaker, and a corrosion sensor was immersed in the tap water. Tap water treated with hybrid ceramic is referred to as treated water.

As shown in FIG. 7, the corrosion sensor 1 </ b> A has a pipe 20 made of hard vinyl chloride, an outer peripheral surface 21 having the same central axis as the central axis of the pipe 20, and a central axis same as the central axis of the pipe 20. An annular cylindrical body 24 made of stainless steel (SUS304) disposed inside the pipe 20 with an inner circumferential surface 22 having an inner circumferential surface 22 formed by the inner circumferential surface 22, and the inner through space Between the inner circumferential surface of the pipe 20 and the outer circumferential surface of the annular columnar body 24, and the cylindrical steel (SS400) 25 having an outer shape smaller than the inner diameter of the inner circumferential surface 22 In the internal through space 23, between the inner peripheral surface of the tubular cylindrical body 24 and the outer peripheral surface of the steel (SS400) 25, and in the upper end opening of the pipe 20, the annular cylindrical body 24 and the steel (SS400). ) 5, the steel (SS400) 25 is electrically connected to the lead wire 27 at the upper end thereof, and the tubular cylindrical body 24 is It has a structure electrically connected to the lead wire 28 at the upper end.
The dimensions of each part in the corrosion sensor 1A are shown in FIG. The main dimensions are as follows: the outer diameter of the pipe 20 is 26 mm, the inner diameter of the pipe 20 is 20 mm, the axial length of the pipe 20 is 16 mm, and the outer diameter of the lower end surface of the cathode electrode made of stainless steel (SUS304) is 16 mm. The inner diameter is 3 mm, the outer diameter of the lower end surface of the anode formed of steel (SS400) is 2 mm, and the anode electrode and the cathode electrode are connected to an ammeter.

  FIG. 8 shows the change over time in the current value measured by the ammeter after the hybrid ceramic and the corrosion sensor are immersed in the beaker. In FIG. 8, the current values are plotted with triangle marks.

  The corrosion sensor was immersed in 1000 mL of tap water placed in a 1000 mL beaker. This tap water is not treated with hybrid ceramic and is therefore referred to as untreated water. The corrosion current value output from the corrosion sensor immersed in untreated water was measured with an ammeter. The change with time of the corrosion current value is shown in FIG. In FIG. 8, this current value is plotted with rhombus marks.

  As shown in FIG. 8, the tap water as the treated water increased in the corrosion current value until about 5 hours from the start of measurement. This increase in the corrosion current value is considered to be caused by red rust on the surface of the anode electrode. The corrosion current value decreased within 5 to 10 hours from the start of the measurement, and the corrosion current value was kept between 15 μA and 20 μA until nearly 80 hours thereafter.

  On the other hand, in the case of tap water that is untreated water, the corrosion current value increased after 50 hours from the start of measurement, and became larger than the corrosion current value in tap water that was treated water.

  In this way, the corrosion current value in tap water in contact with the hybrid ceramic becomes a substantially constant value after 10 hours from the start of measurement, while the corrosion current value in tap water not in contact with the hybrid ceramic. However, after 50 hours have passed since the start of measurement, it shows an upward trend, and after 50 hours have passed since the start of measurement, the corrosion current value of untreated water is greater than the corrosion current value of treated water. It is considered that the untreated water continued to generate rust on the surface of the anode electrode, and the treated water formed black rust or the like on the surface of the anode electrode to prevent the progress of corrosion.

From this experimental result, the corrosion current value A of the water flowing into the water treatment device, that is, the untreated water, is compared with the corrosion current value B of the water discharged from the water treatment device, that is, the treated water. By detecting that the period larger than the current value B continues, it can be determined that the water treatment effect by the water treatment device is maintained.
In the water reforming effect determination apparatus according to the present invention, the determination that “the period during which the corrosion current value A is greater than the corrosion current value B continues” is made by observing a simple magnitude relationship between the current values. Not only that, it can be realized by comparing the integrated values of the current values.

DESCRIPTION OF SYMBOLS 1 Corrosion sensor 1A 1st corrosion sensor 1B 2nd corrosion sensor 2 Pipe 3 Spacer 4 Iron plate 4A Anode electrode 5 Stainless steel plate 5A Cathode electrode 6 Reference electrode 7 Lead wire 8 Synthetic resin 9 Water faucet socket 9A One end opening 9B The other end Opening 9C Tubular body 9D Through hole 9E Cylindrical part 10A PVC pipe 10B PVC pipe 11 Mounting socket 11A Mounting through hole 11B Cylindrical body 11C Flange part 11D Inserting cylindrical body 11D
12A Ammeter 12B Ammeter 13 Determination unit 14 Comparator 15 Water reforming effect determination device 17 Water pipe 18 Water treatment device 20 Pipe 21 Outer peripheral surface 22 Inner peripheral surface 23 Internal through space 24 Annular cylindrical body 25 Iron (SS400)
26 Insulating resin 27, 28 Lead wire

Claims (3)

A first corrosion sensor having a cathode electrode made of stainless steel and an anode electrode made of iron and immersed in water before water treatment supplied to the water treatment device;
A second water corrosion sensor having a cathode electrode made of stainless steel and an anode electrode made of iron and immersed in water after water treatment discharged from the water treatment device;
A comparison means for comparing the corrosion current value A output from the first corrosion sensor with the corrosion current value B output from the second corrosion sensor;
A water reforming effect determination, comprising: a determination unit that determines that the water reforming effect is maintained by determining that a period in which the corrosion current value A is greater than the corrosion current value B continues. apparatus.   The water treatment apparatus is an apparatus for reforming water by bringing water before treatment into contact with a hybrid ceramic that radiates far infrared rays of 4.4 to 15.4 μm with an integral emissivity of 92% or more. The water reforming effect determination device according to 1. A first corrosion sensor having a cathode electrode made of stainless steel and an anode electrode made of iron is immersed in water before water treatment supplied to the water treatment device,
A second corrosion sensor having a cathode electrode formed of stainless steel and an anode electrode formed of iron is immersed in water after water treatment discharged from the water treatment device,
It is determined that the water reforming effect is maintained by determining that the period during which the corrosion current value A output from the first corrosion sensor is greater than the corrosion current value B output from the second corrosion sensor continues. To determine the water reforming effect.

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