JP2020142207A - Hydrogenation device, and determination method of degree-of-wear of hydrogen permeable membrane - Google Patents

Abstract

To provide a hydrogenation device and a determination method of the degree-of-wear of a hydrogen permeable membrane, capable of determining accurately the degree-of-wear of a hydrogen permeable membrane module by a simple and inexpensive constitution.SOLUTION: A hydrogenation device 1 includes a first chamber 31 into which hydrogen gas is supplied, a second chamber 32 into which raw water is supplied, a hydrogen permeable membrane 33 for moving hydrogen gas from the first chamber 31 to the second chamber 32, in order to generate hydrogenated water in the second chamber 32, a pressure sensor 51 for detecting a pressure in the first chamber 31, and a control part for determining the degree-of-wear of the hydrogen permeable membrane 33 at least based on the pressure in the first chamber 31.SELECTED DRAWING: Figure 2

Description

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 wear of a hydrogen permeable membrane.

As a method of adding hydrogen to water, a module in which a hydrogen gas flow section and a raw material water flow section are partitioned by a hydrogen permeation film (gas permeation film) 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 section is known (see, for example, Patent Document 1).

JP-A-2009-125654

The module deteriorates due to wear of the hydrogen permeable membrane, so regular replacement is recommended. The degree of wear of the hydrogen permeable membrane can be easily estimated from, for example, the usage time of the module.

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

The present invention has been devised in view of the above circumstances, and provides a hydrogenation apparatus capable of accurately determining the degree of wear of a hydrogen permeable membrane with a simple and inexpensive configuration, and a method for determining the degree of wear of a hydrogen permeable membrane. The main purpose is that.

The first invention of the present invention is a hydrogenation apparatus for adding hydrogen to water, in which hydrogen is supplied in a first chamber to which hydrogen gas is supplied, a second chamber to which raw water is supplied, and hydrogen in the second chamber. A hydrogen permeable film that moves the hydrogen gas from the first chamber to the second chamber in order to generate additional water, a pressure detection unit that detects the pressure in the first chamber, and at least based on the pressure. A determination unit for determining the degree of wear of the hydrogen permeable film is provided.

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

It is desirable that the hydrogenation apparatus according to the present invention further includes a hydrogen gas generating unit that generates the hydrogen gas supplied to the first chamber.

In the hydrogen addition device according to the present invention, the hydrogen gas generating unit has an anode feeding body and a cathode feeding body, generates the hydrogen gas by electrolyzing water, and supplies the hydrogen gas to the first chamber. It has an electrolytic cell, further includes a control unit that controls a voltage applied to the anode power supply body and the cathode power supply body, and the control unit controls the voltage so that the dissolved hydrogen concentration becomes constant. 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 consumption of the hydrogen permeation membrane based on the relationship between the pressure and the dissolved hydrogen concentration.

The hydrogenation apparatus according to the present invention further includes a flow rate detection unit that detects the supply amount of the raw water to the second chamber per unit time, and the determination unit further includes the determination unit based on the supply amount. It is desirable to determine the degree of wear 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. Includes a step to determine the degree of consumption of.

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. Will be done. For example, when the hydrogen permeable membrane is exhausted, the pressure in the first chamber may exceed a previously assumed range. Therefore, in the first invention, the determination unit determines the degree of wear of the hydrogen permeable membrane based on at least the pressure in the first chamber, so that the hydrogen permeable membrane has a simple and inexpensive configuration. 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 steps are included, it is possible to accurately determine the degree of wear of the hydrogen permeable membrane module with a simple and inexpensive configuration.

It is a figure which shows the schematic structure of the hydrogenation apparatus which is one Embodiment of this invention. It is a figure which shows the main structure of a hydrogenation apparatus. It is a block diagram which shows the electrical structure of a hydrogenation apparatus. It is a flowchart which shows the processing procedure of the wear degree determination method of one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described 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 preparing a dialysate as, for example, dialysate preparation water (hereinafter, hydrogenated water is dialyzed). It may also be referred to as water for liquid preparation). In recent years, hemodialysis using hydrogenated water for preparing dialysate has been attracting attention as being effective in reducing oxidative stress in patients.

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

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 preparing a dialysate. It is used as raw water for dialysis (hereinafter referred to as raw water).

The hydrogenation apparatus 1 used for producing the 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 material diluting device are connected by a hydrogenation water supply path 20. The hydrogenated water generated by the hydrogenation apparatus 1 passes through the hydrogenated water supply channel 20 and is supplied to the dialysate diluting apparatus and used for preparing a dialysate.

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

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

In the electrolytic cell 4, the first pole chamber 40a in which the first feeding body 41 is arranged and the second pole chamber 40b in which the second feeding body 42 is arranged are separated by a diaphragm 43.

The polarities of the first feeding body 41 and the second feeding body 42 are different. 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 pole chamber 40a and the second pole chamber 40b of the electrolytic chamber 40, and a DC voltage is applied to the first feeding body 41 and the second feeding body 42, so that water is supplied in the electrolytic chamber 40. Electrolysis occurs.

FIG. 3 is a block diagram showing an electrical configuration of the hydrogenation apparatus 1. The polarity of the first feeding body 41 and the second feeding body 42 and the voltage applied to the first feeding body 41 and the second feeding body 42 are controlled by the control unit 9. The control unit 9 has, for example, a CPU (Central Processing Unit) that executes various arithmetic processes, information processing, and the like, a program that controls the operation of the CPU, and a memory that stores various information. The control unit 9 controls each unit of the device in addition to the first power supply body 41 and the second power supply 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 feeding body 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. As a result, the electrolytic current supplied to the first feeding body 41 and the second feeding body 42 is appropriately controlled.

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

For the diaphragm 43, for example, a solid polymer membrane made of a fluorine-based resin 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 membrane 33.

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

On the other hand, the second chamber 32 is connected to the treated water supply path 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 that allows hydrogen gas to permeate. Since the hydrogen gas generated in the electrolytic cell 4 is supplied to the first chamber 31 one after another, the pressure in the first chamber 31 is increased. The hollow fiber membrane moves hydrogen gas from the high pressure first chamber 31 to the low pressure second chamber 32. The hydrogen permeable membrane 33 may be a membrane having a function of allowing hydrogen gas to permeate from the high-pressure fluid side to the low-pressure fluid side, and is not limited to the hollow fiber membrane.

In the present embodiment, the hydrogen permeation membrane 33 moves hydrogen gas supplied one after another 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 hydrogenated water with a simple and inexpensive configuration without the need for a configuration 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 as the hydrogen permeable membrane 33 is consumed, the dissolved hydrogen concentration decreases. 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 control unit 9 determines the degree of wear of the hydrogen permeable membrane 33 at any time or periodically.

A pressure sensor (pressure detection unit) 51 is provided in the hydrogen supply path 5. The pressure sensor 51 detects the pressure in the hydrogen supply path 5. Since the hydrogen supply path 5 communicates with the first chamber 31, the pressure in the hydrogen supply path 5 and the pressure in 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 previously assumed range. 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. A plurality of the above 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 wear of the hydrogen permeable membrane module 3 with a simple and inexpensive configuration.

The hydrogenation apparatus 1 is provided with an output unit 91 that outputs the degree of wear of the hydrogen permeation membrane 33 determined by the control unit 9. The output unit 91 outputs the degree of wear by voice, an image, or the like. 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 administrator of the hydrogenation apparatus 1 can easily know the degree of wear of the hydrogen permeation 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 hydrogenation device 1 and the piping around it are simplified.

It is desirable that the hydrogenated water supply path 20 is provided with a hydrogen concentration sensor (hydrogen concentration detection unit) 21. 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, the 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 a 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 degree of consumption 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 degree of consumption of the hydrogen permeable film 33 based only on the dissolved hydrogen concentration of the hydrogenated water, and the pressure of the first chamber 31 and the dissolved hydrogenated water may be determined. It may be configured to determine the degree of consumption based on the hydrogen concentration. Further, in the latter case, the consumption degree is totaled by the AND function or the or function of the consumption degree determined based on the pressure of the first chamber 31 and the consumption degree determined based on the dissolved hydrogen concentration of the hydrogenated water. It may be configured to make a 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 wear of the hydrogen permeable membrane module 3 with a simple and inexpensive configuration.

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 31 by increasing the DC voltage applied to the first power feeding body 41 and the second feeding body 42. Increase the pressure of the hydrogenated water and increase the dissolved hydrogen concentration of the 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. And reduce the concentration of dissolved hydrogen in 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 produced in the hydrogenation apparatus 1 and supplied to the dialysate diluting apparatus.

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

Therefore, the control unit 9 of the 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 wear of the hydrogen permeable membrane module 3 with a simple and inexpensive configuration.

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 hydrogenated water and the degree of consumption of the hydrogen permeable membrane 33 is determined in advance by an experiment or the like, and the pressure and the dissolved hydrogen concentration are substituted into the above relational expression. By doing so, the degree of wear of the hydrogen permeable membrane 33 may be determined.

The treated water supply path 10 is provided with a water inlet valve 12 and a flow meter (flow rate detecting unit) 13. The water inlet valve 12 is driven by, for example, an electromagnetic force controlled by the control unit 9 to limit the treated water flowing in the treated water supply path 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 to the second chamber 32 as raw water is optimized.

A water supply valve 14 is provided in the treated water supply path 11. The water supply valve 14 is driven by, for example, an electromagnetic force controlled by the control unit 9 to limit the treated water flowing in the treated water supply path 11. More specifically, when the electrolytic cell 4 is filled or replenished with water for electrolysis, the water supply valve 14 is opened, and then when the raw water is supplied to the second chamber 32 of the hydrogen permeation membrane module 3. 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, as 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 degree of consumption of the hydrogen permeable membrane 33 based on the supply amount of raw water detected by the flow meter 13 in addition to the pressure of the first chamber 31 detected by the pressure sensor 51. It is desirable that it is configured to do so. As a result, the control unit 9 can more accurately determine the degree of wear of the hydrogen permeation membrane 33.

A gas vent valve 16 is provided in an 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 wear 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 a step S4 for determining the degree of wear and a step S5 for 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 amount of 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, steps 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 determination result of step S3 is output by the output unit 91.

According to this consumption degree determination method, it is possible to accurately determine the consumption degree 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 specific embodiment described above, and 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 for determining the degree of wear.

Further, in the hydrogenation apparatus 1 shown in FIG. 1, the hydrogen gas generation unit 2 that generates hydrogen gas to be supplied 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 a pressure detecting unit for detecting 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 hydrogenation apparatus 1 can be applied to various uses other than the generation of hydrogenated water for preparing a dialysate. For example, it can be widely applied to the generation of hydrogenated water for drinking, cooking or agriculture.

Further, the consumption degree determination method includes at least a step S1 for detecting the pressure of the first chamber 31 and a step S4 for determining the consumption degree of the hydrogen permeation membrane 33. I just need to be there. For example, step S2 for detecting the dissolved hydrogen concentration or step S3 for 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 permeation membrane module 4: Electrolytic cell 9: Control unit (judgment 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 feeding body (cathode feeding body)

Claims (8)

A device for adding hydrogen to water
The first room where hydrogen gas is supplied and
The second room where raw water is supplied and
A hydrogen permeable membrane that moves the hydrogen gas from the first chamber to the second chamber in order 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.
Hydrogenation equipment. The hydrogenation apparatus according to claim 1, further comprising a hydrogen concentration detecting unit for detecting the dissolved hydrogen concentration of the hydrogenated water taken out from the second chamber. The hydrogenation apparatus according to claim 2, further comprising a hydrogen gas generating unit for generating the hydrogen gas supplied to the first chamber. The hydrogen gas generating unit has an anode feeding body and a cathode feeding body, and has an electrolytic cell that generates the hydrogen gas by electrolyzing water and supplies it 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 hydrogenation apparatus according to claim 3, wherein the control unit controls the voltage so that the dissolved hydrogen concentration becomes 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 permeation 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. A flow rate detection unit for detecting the amount of the raw water supplied to the second chamber per unit time is further provided.
The hydrogenation apparatus according to any one of claims 1 to 6, wherein the determination unit further determines the degree of consumption of the hydrogen permeable membrane based on the supply amount. In a hydrogen permeation module including a first chamber to which hydrogen gas is supplied, a second chamber to which raw water is supplied, and a hydrogen permeation membrane 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 membrane.
The step of detecting the pressure in the first chamber and
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 wear of a hydrogen permeable membrane.

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