WO2020179339A1

WO2020179339A1 - Hydrogen addition device, and method for assessing degree consumption of hydrogen permeable film

Info

Publication number: WO2020179339A1
Application number: PCT/JP2020/004380
Authority: WO
Inventors: 孝士橘
Original assignee: 株式会社日本トリム
Priority date: 2019-03-07
Filing date: 2020-02-05
Publication date: 2020-09-10
Also published as: JP7022089B2; TW202100231A; CN113396009A; CN113396009B; JP2020142207A

Abstract

This hydrogen addition device 1 comprises a first chamber 31 to which hydrogen gas is supplied, a second chamber 32 to which raw water is supplied, a hydrogen permeable film 33 that causes the hydrogen gas to move from the first chamber 31 into the second chamber 32 in order to generate hydrogen-added water in the second chamber 32, a pressure sensor 51 that detects the pressure in the first chamber 31, and a control unit that assesses the degree of consumption of the hydrogen permeable film 33 on the basis of at least the pressure in the first chamber 31.

Description

Hydrogen addition device and method for determining degree of consumption of hydrogen permeable membrane

The present invention relates to an apparatus for generating hydrogenated water in which hydrogen is added to water and a method for determining the degree of consumption of a hydrogen permeable membrane.

As a method of adding hydrogen to water, a module in which a hydrogen gas flow section (raw gas flow section) is divided by a hydrogen permeable membrane (gas permeable membrane) is used, and pressurized hydrogen gas is supplied to the hydrogen gas flow section. A technique for dissolving hydrogen in the raw material water supplied to the raw material water distribution unit is known (see, for example, Patent Document 1).

JP-A-2009-125654

-The above module deteriorates due to exhaustion of the hydrogen permeable membrane, so periodical replacement is recommended. The degree of consumption of the hydrogen permeable membrane can be easily estimated by, for example, the usage time of the module.

However, since hydrogen permeable membranes are expensive, in order to generate hydrogen-added water at low running costs, it is necessary to establish a technique for more accurately determining the degree of consumption of hydrogen permeable membranes.

The present invention has been devised in view of the above circumstances, and provides a hydrogen addition device and a method for determining the degree of consumption of a hydrogen permeable membrane, which can accurately determine the degree of consumption of a hydrogen permeable membrane with a simple and inexpensive configuration. The main purpose is that.

A first aspect of the present invention is a hydrogen adding apparatus for adding hydrogen to water, comprising a first chamber to which hydrogen gas is supplied, a second chamber to which raw water is supplied, and a hydrogen in the second chamber. A hydrogen permeable membrane that moves the hydrogen gas from the first chamber to the second chamber to generate additional water; a pressure detection unit that detects the pressure of the first chamber; and at least based on the pressure. And a determination unit that determines the degree of consumption of the hydrogen permeable membrane.

It is desirable that the hydrogenation apparatus according to the present invention further includes a hydrogen concentration detection unit that detects the dissolved hydrogen concentration of the hydrogenated water taken out from the second chamber.

It is desirable that the hydrogen addition apparatus according to the present invention further include a hydrogen gas generation unit that generates the hydrogen gas to be supplied to the first chamber.

In the hydrogen adding apparatus according to the present invention, the hydrogen gas generation unit has an anode power feeder and a cathode power feeder, generates the hydrogen gas by electrolyzing water, and supplies the hydrogen gas to the first chamber. An electrolytic cell, further comprising a control unit for controlling the voltage applied to the anode power supply and the cathode power supply, the control unit, so that the dissolved hydrogen concentration is constant, controls the voltage, Is desirable.

In the hydrogenation apparatus according to the present invention, it is desirable that the determination unit further determines the degree of consumption of the hydrogen permeation membrane based on the dissolved hydrogen concentration.

In the hydrogenation apparatus according to the present invention, it is desirable that the determination unit determines the degree of wear of the hydrogen permeation membrane based on the relationship between the pressure and the dissolved hydrogen concentration.

In the hydrogen adding apparatus according to the present invention, further comprising a flow rate detection unit that detects a supply amount of the raw water to the second chamber per unit time, the determination unit further based on the supply amount, It is desirable to determine the degree of consumption of the hydrogen permeable membrane.

The second invention of the present invention includes a first chamber to which hydrogen gas is supplied, a second chamber to which raw water is supplied, and a hydrogen permeable film for moving the hydrogen gas from the first chamber to the second chamber. A method for determining the degree of wear of the hydrogen permeable film, which comprises the step of detecting the pressure in the first chamber, and at least the hydrogen permeable film based on the pressure. Determining the degree of wear of the.

In the hydrogenation apparatus of the first invention, the hydrogen gas permeates the hydrogen permeable membrane and moves from the first chamber to the second chamber, so that the hydrogenated water is generated in the second chamber. To be done. For example, when the hydrogen permeable membrane is exhausted, the pressure in the first chamber may exceed a range that is assumed in advance. Therefore, in the first aspect of the present invention, the determination unit determines the consumption level of the hydrogen permeable membrane based on at least the pressure of the first chamber, so that the hydrogen permeable membrane has a simple and inexpensive structure. It is possible to accurately determine the degree of wear of the module.

The method for determining the degree of wear of the hydrogen permeable membrane of the second invention determines the degree of wear of the hydrogen permeable membrane based on the step of detecting the pressure in the first chamber and at least the pressure. Since the above steps are included, it is possible to accurately determine the consumption level of the hydrogen permeable membrane module with a simple and inexpensive structure.

It is a figure which shows schematic structure of the hydrogen addition apparatus which is one Embodiment of this invention. It is a figure which shows the main structures of a hydrogenation apparatus. It is a block diagram which shows the electric constitution of a hydrogenation apparatus. It is a flow chart which shows a processing procedure of a consumption degree judging method of an embodiment of the invention.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a schematic configuration of an embodiment of the hydrogenation apparatus of the present invention. The hydrogenation device 1 is a device for adding hydrogen to water, and the hydrogenated water to which hydrogen is added is used, for example, as dialysate preparation water for preparing a dialysate (hereinafter, the hydrogenated water is dialyzed). Sometimes referred to as water for liquid preparation). In recent years, hemodialysis using hydrogenated water for the preparation of dialysate has received attention as being effective in reducing oxidative stress in patients.

The hydrogen addition device 1 is arranged, for example, on the downstream side of the reverse osmosis membrane treatment device 200. The hydrogenation device 1 and the reverse osmosis membrane treatment device 200 may be integrated and configured as one device. On the downstream side of the hydrogenation apparatus 1, for example, a dialysis agent diluting device (not shown) for diluting a liquid dialysis agent with water for preparing a dialysate is connected.

The reverse osmosis membrane treatment device 200 purifies water supplied from the outside by using the reverse osmosis membrane. The reverse osmosis membrane treatment device 200 and the hydrogenation device 1 are connected by a treated water supply path 10. The water purified by the reverse osmosis membrane treatment device 200 (hereinafter referred to as treated water) passes through the treated water supply path 10 and is supplied to the hydrogenation device 1 to generate hydrogenated water for dialysate preparation. Used as raw water (hereinafter referred to as raw water).

The hydrogenation apparatus 1 used for producing dialysate preparation water adds hydrogen to the raw water supplied from the reverse osmosis membrane treatment apparatus 200 to generate hydrogenated water for dialysate preparation. The hydrogenation device 1 and the dialysis base agent dilution device are connected by a hydrogenation water supply passage 20. The hydrogenated water generated by the hydrogenation device 1 passes through the hydrogenation water supply passage 20 and is supplied to the dialysis base agent diluting device to be used for preparing a dialysate.

FIG. 2 shows the main configuration of the hydrogen addition device 1. The hydrogenation device 1 includes a hydrogen gas generation unit 2 and a hydrogen permeable membrane module 3.

The hydrogen gas generation unit 2 generates hydrogen gas and supplies the hydrogen gas to the hydrogen permeable membrane module 3. In this embodiment, the electrolytic cell 4 is applied as the hydrogen gas generation unit 2. The electrolytic bath 4 generates hydrogen gas by electrolyzing water.

The electrolytic cell 4 is configured such that a first polar chamber 40a in which the first power feeding body 41 is arranged and a second polar chamber 40b in which the second power feeding body 42 is arranged are separated by a diaphragm 43.

The first power feeding body 41 and the second power feeding body 42 have different polarities. That is, one of the first feeding body 41 and the second feeding body 42 is applied as an anode feeding body, and the other is applied as a cathode feeding body. In the present embodiment, the first feeding body 41 is applied as an anode feeding body, and the second feeding body 42 is applied as a cathode feeding body. Water is supplied to both the first electrode chamber 40a and the second electrode chamber 40b of the electrolysis chamber 40, and a DC voltage is applied to the first power feeding body 41 and the second power feeding body 42, so that water is generated in the electrolysis chamber 40. Electrolysis occurs.

FIG. 3 is a block diagram showing the electrical configuration of the hydrogenation device 1. The polarities of the first feeder 41 and the second feeder 42 and the voltages applied to the first feeder 41 and the second feeder 42 are controlled by the control unit 9. The control unit 9 includes, for example, a CPU (Central Processing Unit) that executes various types of arithmetic processing and information processing, a program that controls the operation of the CPU, and a memory that stores various types of information. The control unit 9 controls the respective units of the device in addition to the first power feeding body 41 and the second power feeding body 42.

A current detector 44 is provided in the current supply line between the first power feeding body 41 and the control unit 9. The current detector 44 may be provided in the current supply line between the second power feeder 42 and the control unit 9. The current detector 44 detects the electrolytic current supplied to the first feeding body 41 and the second feeding body 42, and outputs an electric signal corresponding to the value to the control unit 9.

The control unit 9 controls the DC voltage applied to the first feeding body 41 and the second feeding body 42, for example, based on the electric signal output from the current detector 44. More specifically, the control unit 9 applies a DC voltage to the first feeding body 41 and the second feeding body 42 so that the electrolytic current detected by the current detector 44 becomes a preset desired value. Feedback control. For example, when the electrolytic current is excessive, the control unit 9 reduces the voltage, and when the electrolytic current is too small, the control unit 9 increases the voltage. Accordingly, the electrolytic current supplied to the first power feeding body 41 and the second power feeding body 42 is appropriately controlled.

1 and 2, hydrogen gas and oxygen gas are generated by electrolyzing water in the electrolysis chamber 40. For example, hydrogen gas is generated in the second electrode chamber 40b on the cathode side, and the hydrogen gas is supplied to the hydrogen permeable membrane module 3. On the other hand, oxygen gas is generated in the first electrode chamber 40a on the anode side.

As the diaphragm 43, for example, a solid polymer film made of a fluororesin having a sulfonic acid group is appropriately used. In the solid polymer membrane, the oxonium ion generated in the first electrode chamber 40a on the anode side is moved to the second electrode chamber 40b on the cathode side by electrolysis, and is used as a raw material for producing hydrogen gas. Therefore, the pH of the electrolyzed water in the first polar chamber 40a and the second polar chamber 40b does not change without generating hydroxide ions during electrolysis.

The hydrogen permeable membrane module 3 includes a first chamber 31, a second chamber 32, and a hydrogen permeable membrane 33. The first chamber 31 and the second chamber 32 are separated by a hydrogen permeable film 33.

The first chamber 31 and the second electrode chamber 40b of the electrolytic cell 4 are connected by the hydrogen supply path 5. The hydrogen gas generated in the second electrode chamber 40b of the electrolytic cell 4 passes through the hydrogen supply path 5 and is supplied to the first chamber 31.

On the other hand, the second chamber 32 is connected to the treated water supply passage 10. Raw water is supplied to the second chamber 32 from the reverse osmosis membrane treatment device 200.

The hydrogen permeable membrane 33 is composed of, for example, a hollow fiber membrane which is a porous membrane permeable to hydrogen gas. Since the hydrogen gas generated in the electrolytic cell 4 is successively supplied to the first chamber 31, the pressure inside the first chamber 31 is increased. The hollow fiber membrane moves hydrogen gas from the first chamber 31 having a high pressure to the second chamber 32 having a low pressure. The hydrogen permeable membrane 33 is not limited to a hollow fiber membrane as long as it has a function of permeating hydrogen gas from the high pressure fluid side to the low pressure fluid side.

In the present embodiment, the hydrogen permeable membrane 33 moves the hydrogen gas sequentially supplied from the electrolytic cell 4 from the first chamber 31 to the second chamber 32 in order to generate hydrogenated water in the second chamber 32. .. This makes it possible to generate hydrogen-added water with a simple and inexpensive structure without requiring a structure such as a pump for pressurizing hydrogen gas.

By the way, the hydrogen permeable membrane 33 is consumed with use. The dissolved hydrogen concentration of the hydrogenated water taken out from the second chamber 32 depends on the degree of consumption of the hydrogen permeable membrane 33. More specifically, when the hydrogen permeable membrane 33 is new, the dissolved hydrogen concentration of the hydrogenated water generated in the second chamber 32 is high, and the dissolved hydrogen concentration decreases as the hydrogen permeable membrane 33 is consumed. Therefore, in the present hydrogenation apparatus 1, the control unit 9 functions as a determination unit for determining the degree of wear of the hydrogen permeable membrane 33, and monitors the degree of wear of the hydrogen permeable membrane 33. The determination of the degree of consumption of the hydrogen permeable membrane 33 by the control unit 9 is performed as needed or periodically.

The hydrogen supply path 5 is provided with a pressure sensor (pressure detection unit) 51. The pressure sensor 51 detects the pressure in the hydrogen supply passage 5. Since the hydrogen supply passage 5 communicates with the first chamber 31, the pressure inside the hydrogen supply passage 5 and the pressure inside the first chamber 31 are substantially equal. Therefore, the pressure sensor 51 detects the pressure in the first chamber 31. The pressure sensor 51 may be provided in the first chamber 31. The pressure sensor 51 outputs an electric signal corresponding to the detected pressure in the first chamber 31 to the control unit 9.

For example, when the hydrogen permeable membrane is exhausted, the pressure in the first chamber may exceed a range that is assumed in advance. Therefore, when the pressure in the first chamber 31 exceeds a predetermined threshold value, it can be determined that the hydrogen permeable membrane 33 is being consumed. Plural threshold values may be set. Therefore, the control unit 9 determines the degree of wear of the hydrogen permeable membrane 33 based on the electric signal input from the pressure sensor 51, that is, the pressure in the first chamber 31. This makes it possible to accurately determine the degree of consumption of the hydrogen permeable membrane module 3 with a simple and inexpensive structure.

The hydrogen addition device 1 is provided with an output unit 91 that outputs the consumption level of the hydrogen permeable membrane 33 determined by the control unit 9. The output unit 91 outputs the consumption level by voice or image. Such an output unit 91 can be realized by a speaker device, an LED (light emitting diode), a liquid crystal display (Liquid Crystal Display), or the like. Further, the output unit 91 may be configured to output a wireless or wired signal corresponding to the degree of wear of the hydrogen permeable membrane 33 to the computer device that manages the hydrogenation device 1. With such an output unit 91, the manager of the hydrogen adding apparatus 1 can easily know the degree of consumption of the hydrogen permeable membrane 33.

As shown in FIG. 1, in the present embodiment, the treated water that has been subjected to the reverse osmosis membrane treatment by the reverse osmosis membrane treatment apparatus 200 is applied to the water that is electrolyzed in the electrolytic cell 4. The treated water is supplied to the electrolytic cell 4 via the treated water supply path 10 and the treated water supply path 11 branching from the treated water supply path 10. That is, the electrolytic cell 4 of the hydrogen gas generation unit 2 and the second chamber 32 of the hydrogen permeation membrane module 3 receive the treated water from the reverse osmosis membrane treatment device 200, which is the same water source. With such a configuration, the hydrogen adding apparatus 1 and the piping around the hydrogen adding apparatus 1 are simplified.

It is desirable that a hydrogen concentration sensor (hydrogen concentration detector) 21 be provided in the hydrogen-added water supply passage 20. The hydrogen concentration sensor 21 detects the dissolved hydrogen concentration of the hydrogenated water taken out from the second chamber 32, and outputs a corresponding electric signal to the control unit 9.

For example, consumption of the hydrogen permeable membrane 33 may affect the dissolved hydrogen concentration of the hydrogenated water. Therefore, when the dissolved hydrogen concentration of the hydrogenated water is less than the predetermined threshold value, it can be determined that the hydrogen permeable membrane 33 is being consumed. Therefore, the control unit 9 may be configured to determine the exhaustion degree of the hydrogen permeable membrane 33 based on the electric signal input from the hydrogen concentration sensor 21, that is, the dissolved hydrogen concentration of the hydrogenated water. ..

For example, the control unit 9 may be configured to determine the exhaustion degree of the hydrogen permeable membrane 33 based only on the dissolved hydrogen concentration of the hydrogen-added water, and the pressure of the first chamber 31 and the dissolution of the hydrogen-added water. The consumption level may be determined based on the hydrogen concentration. Further, in the latter case, the consumption level is comprehensively calculated by the AND function or the OR function of the consumption level determined based on the pressure of the first chamber 31 and the consumption level determined based on the dissolved hydrogen concentration of the hydrogen-added water. It may be configured to make a positive determination. Furthermore, after determining the degree of consumption of the hydrogen permeable film 33 based on the pressure of the first chamber 31, the degree of consumption may be corrected based on the dissolved hydrogen concentration of the hydrogenated water. After determining the degree of consumption of the hydrogen permeable film 33 based on the dissolved hydrogen concentration of the hydrogenated water, the degree of consumption may be corrected based on the pressure of the first chamber 31. This makes it possible to accurately determine the degree of consumption of the hydrogen permeable membrane module 3 with a simple and inexpensive structure.

In the present embodiment, the control unit 9 applies a DC voltage to the first feeding body 41 and the second feeding body 42 based on the electric signal input from the hydrogen concentration sensor 21, that is, the dissolved hydrogen concentration of the hydrogenated water. To control. For example, when the dissolved hydrogen concentration detected by the hydrogen concentration sensor 21 is less than the target value, the first chamber 31 is increased by increasing the DC voltage applied to the first feeding body 41 and the second feeding body 42. To increase the dissolved hydrogen concentration of hydrogenated water. On the other hand, when the dissolved hydrogen concentration detected by the hydrogen concentration sensor 21 exceeds the target value, the pressure in the first chamber 31 is reduced by lowering the DC voltage applied to the first feeding body 41 and the second feeding body 42. To reduce the dissolved hydrogen concentration of hydrogenated water. In this way, the control unit 9 controls the DC voltage applied to the first feeding body 41 and the second feeding body 42 so that the dissolved hydrogen concentration becomes constant, so that the hydrogenated water having a desired dissolved hydrogen concentration can be obtained. It is generated in the hydrogenation device 1 and is supplied to the dialysis drug substance diluting device.

As described above, as the depletion of the hydrogen permeable membrane 33 progresses, the concentration of dissolved hydrogen in the hydrogenated water tends to decrease, and the control unit 9 has the first feeder 41 and the second feeding body 41 to compensate for this. The DC voltage applied to the power supply body 42 is increased to increase the pressure in the first chamber 31.

Therefore, the control unit 9 of the present hydrogenation apparatus 1 determines the degree of wear of the hydrogen permeable membrane 33 based on the electric signal input from the pressure sensor 51, that is, the pressure of the first chamber 31. This makes it possible to accurately determine the degree of consumption of the hydrogen permeable membrane module 3 with a simple and inexpensive structure.

Further, as the consumption of the hydrogen permeable membrane 33 progresses, even if the pressure in the first chamber 31 is increased, the dissolved hydrogen concentration of the hydrogenated water tends to be difficult to sufficiently increase. Therefore, the control unit 9 may be configured to determine the degree of consumption of the hydrogen permeable membrane 33 based on the relationship between the pressure in the first chamber 31 and the dissolved hydrogen concentration of the hydrogenated water. For example, a relational expression showing the correlation between the pressure of the first chamber 31 and the dissolved hydrogen concentration of the hydrogen-added water and the degree of consumption of the hydrogen permeable membrane 33 is predetermined by experiments and the like, and the pressure and the dissolved hydrogen concentration are substituted into the relational expression. By doing so, the degree of consumption of the hydrogen permeable film 33 may be obtained.

The treated water supply path 10 is provided with a water inlet valve 12 and a flow meter (flow rate detector) 13. The water inlet valve 12 is driven by, for example, an electromagnetic force controlled by the controller 9, and limits the treated water flowing in the treated water supply passage 10. The flow meter 13 detects the flow rate per unit time of the treated water flowing in the treated water supply path 10, that is, the raw water supplied to the second chamber 32 (hereinafter, simply referred to as the flow rate or the supply amount), and is a control unit. Output to 9. The control unit 9 controls the water inlet valve 12 according to the flow rate input from the flow meter 13. As a result, the flow rate of the treated water supplied as raw water to the second chamber 32 is optimized.

A water supply valve 14 is provided in the treated water supply passage 11. The water supply valve 14 is driven by, for example, an electromagnetic force controlled by the control unit 9, and limits the treated water flowing in the treated water supply passage 11. More specifically, when filling or replenishing the electrolytic cell 4 with water for electrolysis, the water supply valve 14 is opened, and thereafter, when the raw water is supplied to the second chamber 32 of the hydrogen permeable membrane module 3. At this time, the water supply valve 14 is closed.

The dissolved hydrogen concentration of the hydrogenated water taken out from the second chamber 32 also depends on the amount of raw water supplied to the second chamber 32. For example, when the amount of raw water supplied to the second chamber 32 increases, the dissolved hydrogen concentration of the hydrogenated water tends to decrease.

Therefore, the control unit 9 determines the exhaustion degree of the hydrogen permeable membrane 33 based on the supply amount of the raw water detected by the flow meter 13 in addition to the pressure of the first chamber 31 detected by the pressure sensor 51 and the like. Is preferably configured to. This allows the control unit 9 to more accurately determine the degree of consumption of the hydrogen permeable membrane 33.

A gas vent valve 16 is provided in the exhaust passage 15 (see FIG. 2) extending upward from the first pole chamber 40a of the electrolytic chamber 40. The oxygen gas generated in the first pole chamber 40a by electrolysis is discharged from the exhaust passage 15 and the gas vent valve 16.

FIG. 4 shows a processing procedure of a method for determining the degree of consumption of the hydrogen permeable membrane 33 in the hydrogen permeable membrane module 3. The method for determining the degree of consumption of the hydrogen permeable membrane 33 includes step S1 for detecting the pressure in the first chamber 31, step S2 for detecting the dissolved hydrogen concentration, step S3 for detecting the supply amount of raw water, and the hydrogen permeable membrane 33. It includes step S4 of determining the degree of wear and step S5 of outputting the determination result.

In step S1, the pressure in the first chamber 31 is detected by the pressure sensor 51. In step S2, the dissolved hydrogen concentration of the hydrogenated water taken out from the second chamber 32 is detected by the hydrogen concentration sensor 21. In step S3, the flow rate of the raw water supplied to the second chamber 32 is detected by the flow meter 13. The order of steps S1 to S3 does not matter. That is, for example, step S3 may be executed first, and then steps S1 and S2 may be executed.

In step S4, the control unit 9 makes hydrogen based on the pressure of the first chamber 31 detected in step S1, the dissolved hydrogen concentration of the hydrogenated water detected in step S2, and the supply amount of raw water detected in step S3. The degree of wear of the permeable membrane 33 is determined. Then, in step S4, the output unit 91 outputs the determination result of step S3.

According to the present consumption level determination method, it is possible to accurately determine the consumption level of the hydrogen permeable membrane 33 with a simple and inexpensive configuration.

Although the hydrogenation apparatus 1 and the like of the present invention have been described in detail above, the present invention is not limited to the above-mentioned specific embodiment, but is modified to various embodiments. That is, the hydrogen addition device 1 generates hydrogen gas at least in order to generate hydrogen addition water in the first chamber 31 to which the hydrogen gas is supplied, the second chamber 32 to which the raw water is supplied, and the second chamber 32. The hydrogen permeable film 33 that moves from the first chamber 31 to the second chamber 32, the pressure sensor 51 that detects the pressure of the first chamber 31, and at least the hydrogen permeable film 33 based on the pressure of the first chamber 31. It suffices to include a control unit 9 that determines the degree of wear.

Further, in the hydrogenation apparatus 1 shown in FIG. 1, the hydrogen gas generation unit 2 that generates hydrogen gas for supplying to the first chamber 31 is not limited to the electrolytic cell 4 that electrolyzes water. For example, it may be a device that generates hydrogen gas by a chemical reaction between water and magnesium, or a cylinder filled with hydrogen gas.

Further, as the pressure detection unit that detects the pressure in the first chamber 31, the control unit 9 estimates the pressure in the first chamber 31 based on, for example, the integrated value of the electrolytic current, instead of the pressure sensor 51. It may be configured.

The hydrogen addition device 1 can be applied to various purposes in addition to generation of hydrogen addition water for preparing dialysate. For example, it can be widely applied to the production of hydrogenated water for drinking, cooking or agriculture.

Further, the consumption level determination method includes at least step S1 of detecting the pressure in the first chamber 31 and step S4 of determining the consumption level of the hydrogen permeable film 33. Just go. For example, step S2 of detecting the dissolved hydrogen concentration or step S3 of detecting the supply amount of raw water may be omitted. In this case, in step S4, the control unit 9 determines the degree of consumption of the hydrogen permeable membrane 33 based on the dissolved hydrogen concentration of the dialysate preparation water detected in step S1.

1: Hydrogen addition device 2: Hydrogen gas generation unit 3: Hydrogen permeable membrane module 4: Electrolyzer 9: Control unit (determination unit)
13: Flow meter (flow rate detector)
21: Hydrogen concentration sensor (hydrogen concentration detector)
31: First chamber 32: Second chamber 33: Hydrogen permeable membrane 41: First feeding body (anode feeding body)
42: Second power supply (cathode power supply)

Claims

A device for adding hydrogen to water,
A first chamber to which hydrogen gas is supplied,
The second chamber, which is supplied with raw water,
A hydrogen permeable membrane that moves the hydrogen gas from the first chamber to the second chamber to generate hydrogenated water in the second chamber;
A pressure detection unit that detects the pressure in the first chamber and
At least, a determination unit for determining the degree of wear of the hydrogen permeable membrane based on the pressure is provided.
Hydrogen addition device.
The hydrogenation device according to claim 1, further comprising a hydrogen concentration detection unit that detects a dissolved hydrogen concentration of the hydrogenated water taken out from the second chamber.
The hydrogenation device according to claim 2, further comprising a hydrogen gas generation unit that generates the hydrogen gas supplied to the first chamber.
The hydrogen gas generation unit has an anode power feeder and a cathode power feeder, and has an electrolytic cell that generates the hydrogen gas by electrolyzing water and supplies the hydrogen gas to the first chamber,
Further, a control unit for controlling the voltage applied to the anode feeding body and the cathode feeding body is provided.
The hydrogen addition device according to claim 3, wherein the control unit controls the voltage so that the dissolved hydrogen concentration is constant.
The hydrogenation apparatus according to any one of claims 2 to 4, wherein the determination unit further determines the degree of consumption of the hydrogen permeable membrane based on the dissolved hydrogen concentration.
The hydrogenation apparatus according to claim 5, wherein the determination unit determines the degree of wear of the hydrogen permeation membrane based on the relationship between the pressure and the dissolved hydrogen concentration.
Further comprising a flow rate detection unit that detects an amount of the raw water supplied to the second chamber per unit time,
The hydrogenation device according to claim 1, wherein the determination unit further determines the consumption level of the hydrogen permeable membrane based on the supply amount.
In a hydrogen permeable module comprising a first chamber to which hydrogen gas is supplied, a second chamber to which raw water is supplied, and a hydrogen permeable membrane that moves the hydrogen gas from the first chamber to the second chamber, A method for determining the degree of consumption of the hydrogen permeable membrane, comprising:
Detecting the pressure in the first chamber,
At least, it includes a step of determining the degree of wear of the hydrogen permeable membrane based on the pressure.
A method for determining the degree of consumption of a hydrogen permeable membrane.