JP6368607B2 - Bag-like material, water treatment apparatus, and water treatment method - Google Patents

Description

  The present invention relates to a technique for a water treatment apparatus and a water treatment method.

  Fuel cells require hydrogen, and water is required in the reforming process in order to produce hydrogen from city gas, natural gas, or the like. Water is also used for cooling the fuel cell and humidifying the polymer membrane of the solid polymer fuel cell.

  As water necessary for the operation of such a fuel cell, for example, treated water (pure water) obtained by treating condensed water generated by a power generation reaction of the fuel cell with an ion exchange resin or the like is used. (For example, refer to Patent Document 1 and Patent Document 2). In Patent Document 1 and Patent Document 2, condensed water generated by a power generation reaction of a fuel cell is temporarily stored in a tank (water tank), and the stored water is pumped to a cartridge filled with an ion exchange resin. Discloses an apparatus for water treatment.

  Patent Document 3 and Patent Document 4 disclose apparatuses for performing water treatment by immersing a water-permeable bag-like material containing an ion exchange resin in a water tank, and these water treatment apparatuses. Is used as a water treatment device for removing impurities contained in circulating water such as a cooling tower and impurities in water supplied to an ice tray.

JP-A-8-17457 JP 2011-103292 A JP-A-6-71254 JP-A-7-232168

  However, in the water treatment apparatuses of Patent Document 1 and Patent Document 2, a tank (water tank), a cartridge filled with an ion exchange resin, and a pump are installed, so that a relatively large installation space is required.

  In the water treatment apparatus described in Patent Document 3 and Patent Document 4, it is possible to perform water treatment with a reduced installation space, but a bag-like object or the like containing an ion exchange resin is simply immersed in the water tank. Therefore, the ion exchange capacity (ion exchange capacity) of the ion exchange resin cannot be effectively used, and the quality of the treated water may deteriorate in a relatively short period of time.

  Accordingly, an object of the present invention is to provide a water treatment apparatus and a water treatment method that do not require a large installation space and that can effectively utilize the ion exchange ability of an ion exchange resin.

The water treatment device of the present invention includes a water tank, and a partition that partitions the water tank into a water treatment chamber in which water to be treated is treated and a water storage chamber in which treated water treated in the water treatment chamber is stored. A bag-like material that contains ion exchange resin and has water permeability, the partition wall is a bottomed cylindrical body, the inside of the bottomed cylindrical body is the water treatment chamber, and the bottomed The outer side of the cylindrical body is the water storage chamber, and a bottom surface of the bottomed cylindrical body is provided with a communication path that allows the water treatment chamber and the water storage chamber to communicate with each other. It arrange | positions in the said water treatment chamber so that the water treatment chamber side opening part of a communicating path may be covered.

  Further, the water treatment device of the present invention divides the water tank and the water tank into a water treatment chamber for treating the water to be treated and a water storage chamber for storing the treated water treated in the water treatment chamber. 1 partition, a second partition that partitions the water treatment chamber into at least a first chamber and a second chamber, and a bag-like material that contains an ion exchange resin and has water permeability. The second partition wall is provided with a communication path that allows communication between adjacent chambers, and the bag-like material is provided in the first chamber and the second chamber so as to cover an opening of the communication path of the second partition wall. Has been placed.

  Further, in the water treatment apparatus, the water storage chamber is divided into a first storage section and a second storage section, and an overflow wall that allows the treated water in the first storage section to overflow into the second storage section. The second storage section is provided with a treated water first outlet and a treated water second outlet, and a height position of a lower end of the treated water first outlet is at an upper end of the overflow wall. It is preferable that the height position of the treated water second outlet is set to be higher than the height position of the treated water first outlet.

  In the water treatment apparatus, it is preferable that the water treatment chamber is formed with a meandering flow path in which the water to be treated is meandering.

In the water treatment apparatus, the bag-like product preferably has a tensile elongation of 20 mm or more at a tensile strength of 0.002 N / mm ² .

  Moreover, the said water treatment apparatus WHEREIN: It is preferable that the said bag-like thing is comprised from the knitted fabric which used the fiber.

  In the water treatment apparatus, the ion exchange resin preferably includes a carbonate-type anion exchange resin.

  In the water treatment apparatus, the water to be treated is preferably condensed water discharged from a fuel cell.

  Moreover, the water treatment method of this invention is a water treatment method which processes to-be-processed water using the said water treatment apparatus.

In addition, the present invention includes a water tank, and a partition that divides the water tank into a water treatment chamber in which treated water is treated and a water storage chamber in which treated water treated in the water treatment chamber is stored. The partition wall is a bottomed tubular body, the inside of the bottomed tubular body is the water treatment chamber, the outside of the bottomed tubular body is the water storage chamber, and the bottomed tubular body A water-permeable bag-like material used in a water tank unit provided with a communication passage that allows the water treatment chamber and the water storage chamber to communicate with each other. It accommodates and is arrange | positioned in the said water treatment chamber so that the water treatment chamber side opening part of the said communicating path may be covered.

  The present invention also includes a water tank, a first partition that partitions the water tank into a water treatment chamber in which treated water is treated, and a water storage chamber in which treated water treated in the water treatment chamber is stored, A water tank unit provided with a second partition that divides the water treatment chamber into at least a first chamber and a second chamber, wherein the first partition and the second partition are provided with a communication passage that communicates between adjacent chambers. A water-permeable bag-like material used, wherein the bag-like material contains an ion exchange resin and covers the opening of the communication path of the second partition wall and the second chamber. Arranged indoors.

  According to the present invention, it is possible to provide a water treatment apparatus and a water treatment method that do not require a large installation space and that can effectively utilize the ion exchange ability of an ion exchange resin.

It is a schematic diagram which shows an example of a structure of a fuel cell system provided with the water treatment apparatus which concerns on this embodiment. (A) is a schematic cross section which shows an example of a structure of the water treatment apparatus which concerns on this embodiment, (B) is a schematic perspective view of the water treatment apparatus shown to (A). (A) is a schematic cross section which shows another example of the structure of the water treatment apparatus which concerns on this embodiment, (B) is a schematic perspective view of the water treatment apparatus shown to (A). (A) is a schematic cross section which shows another example of the structure of the water treatment apparatus which concerns on this embodiment, (B) is a schematic perspective view of the water treatment apparatus shown to (A). (A) is a schematic cross section which shows another example of the structure of the water treatment apparatus which concerns on this embodiment, (B) is a schematic perspective view of the water treatment apparatus shown to (A). (A) is a schematic cross section which shows another example of the structure of the water treatment apparatus which concerns on this embodiment, (B) is a schematic perspective view of the water treatment apparatus shown to (A). (A) is a schematic cross-sectional view showing another example of the configuration of the water treatment apparatus according to the present embodiment, and (B) is an exploded schematic perspective view of the water treatment apparatus shown in (A). (A) is a schematic cross section which shows the structure of the water treatment apparatus of a reference example, (B) is a schematic perspective view of the water treatment apparatus shown to (A). (A) is a schematic cross section which shows the structure of the water treatment apparatus of a reference example, (B) is a disassembled schematic perspective view of the water treatment apparatus shown to (A). (A) is a schematic cross section which shows the structure of the water treatment apparatus of the comparative example 1, (B) is a schematic perspective view of the water treatment apparatus shown to (A). It is a figure which shows the relationship between the flow volume of to-be-processed water in the water treatment apparatus of Examples 1-2 and Comparative Example 1, and the electrical conductivity of treated water. It is a figure which shows the relationship between the flow volume of the to-be-processed water in the water treatment apparatus of Comparative Examples 1-4, and the electrical conductivity of a treated water. It is a figure which shows the relationship between the flow volume of the to-be-processed water in the water treatment apparatus of Example 1, 3-5, and the electrical conductivity of a treated water. It is a figure which shows the result of the tensile elongation of bag-like objects AE.

  Embodiments of the present invention will be described below. This embodiment is an example for carrying out the present invention, and the present invention is not limited to this embodiment.

  In the following, the present embodiment will be described as a water treatment device for treating the condensed water discharged from the fuel cell, but the water to be treated is not limited to the condensed water, but the circulating water of the cooling tower, the ice tray, etc. There are no particular restrictions on the tap water supplied to the water. And instead of the conventional water treatment apparatus containing ion exchange apparatuses, such as a cartridge containing ion exchange resin, and the tank (water tank) which stores the water discharged | emitted from an ion exchange apparatus, the water treatment apparatus of this embodiment is changed. It is possible to apply.

  FIG. 1 is a schematic diagram illustrating an example of a configuration of a fuel cell system including a water treatment device according to the present embodiment. A fuel cell system 1 shown in FIG. 1 includes a fuel cell 10, a heat exchanger 14, a water treatment device 12 according to the present embodiment, a discharge pump 18, an air supply line 22, a fuel supply line 24, water supply lines 26a and 26b, and condensation. A water supply line 28, a treated water discharge line 29, an atmospheric discharge line 30, and a hot water supply line 32 are provided.

  An air supply line 22, a fuel supply line 24, and a water supply line 26a are connected to the fuel cell 10. Further, one end of the condensed water supply line 28 is connected to a condensed water discharge port (not shown) of the fuel cell 10, and the other end is connected to the treated water inlet (not shown) of the water treatment device 12 via the heat exchanger 14. It is connected to the. One end of the treated water discharge line 29 is connected to a treated water outlet (not shown) of the water treatment device 12, and the other end is connected to the water supply line 26 a via the discharge pump 18. One end of the water supply line 26 b is connected to the water supply line 26 a and the other end is connected to the heat exchanger 14. The hot water supply line 32 is connected to the heat exchanger 14. The atmospheric discharge line 30 is connected to a condensed water supply line 28 between the heat exchanger 14 and the water treatment device 12.

  FIG. 2A is a schematic cross-sectional view showing an example of the configuration of the water treatment apparatus according to this embodiment, and FIG. 2B is a schematic perspective view of the water treatment apparatus shown in FIG. . Note that FIG. 2B shows the water treatment apparatus in a transparent view so that the internal structure of the water treatment apparatus can be understood, and a bag-like material containing an ion exchange resin described later is omitted.

  The water treatment apparatus 12 of the present embodiment includes a water tank 38 having a water inlet 34 to be treated and a treated water outlet 36, a partition wall 44 that partitions the water tank 38 into a water treatment chamber 40 and a water storage chamber 42, and an ion exchange resin. And a bag 50 having water permeability and containing 48. The water treatment chamber 40 is a room for treating the condensed water (water to be treated) with the ion exchange resin, and the water storage chamber 42 is a room for storing the treated water treated with the ion exchange resin.

  In the present embodiment, the treated water inlet 34 to which the condensed water supply line 28 is connected is disposed in the upper part of the water tank 38, but any position where the treated water can be supplied to the water treatment chamber 40. The position is not particularly limited. In the present embodiment, the treated water outlet 36 to which the treated water discharge line 29 is connected is disposed at the upper part of the side surface of the water tank 38, but at a position where the treated water in the water treatment chamber 40 can be discharged. If present, the position is not particularly limited.

  A circular through hole is formed on the lower end side of the partition wall 44 provided in the water tank 38. This through hole serves as a communication path 46 that communicates the water treatment chamber 40 and the water storage chamber 42. The position, size, shape, and the like of the communication path 46 are appropriately set depending on the size of the water tank 38, and are not particularly limited.

  A water-permeable bag 50 containing the ion exchange resin 48 is provided in the water treatment chamber 40. And the water treatment chamber 40 side opening part of the communicating path 46 is covered with the bag-like thing 50 which has the water permeability which accommodated the ion exchange resin 48. FIG. In addition, that the water treatment chamber 40 side opening part is covered means that the whole water treatment chamber 40 side opening part is covered. Thereby, the water in the water treatment chamber 40 passes through the communication path 46 after passing through the bag-like object 50.

  The bag-like object 50 is preferably fixed to the partition wall 44 so as not to move in the water treatment chamber 40 due to vibration of the water tank 38 or the like. For example, by filling the water treatment chamber 40 with a bag-like object 50 larger than the width of the water treatment chamber 40, the bag-like article 50 is fixed so as not to move.

  Next, an example of the operation of the fuel cell system 1 will be described.

Air and fuel gas (for example, city gas) are supplied to the fuel cell 10 from the air supply line 22 and the fuel supply line 24 shown in FIG. Further, water such as tap water is supplied to the fuel cell 10 from the water supply line 26a. In the case of a solid oxide fuel cell, the water supplied to the fuel cell 10 from the water supply line 26a is, for example, cooling of the fuel cell, humidification of a polymer membrane in the case of a solid polymer fuel cell, etc. It is used in a process for reforming city gas or the like into carbon monoxide (CO) and hydrogen gas (H ₂ ). Then, power is generated by supplying air, fuel gas, water or the like to the fuel cell 10, and electric power is output from the fuel cell 10.

  Condensed water is generated by power generation or the like of the fuel cell 10, and this condensed water is discharged from the condensed water supply line 28 and cooled by a heat exchanger. In addition, since the fuel cell 10 generates power at a high temperature, the tap water supplied from the water supply line 26b is heat-exchanged with the generated exhaust heat from the heat exchanger 14, and is supplied as hot water from the hot water supply line 32. It is also possible to supply

  The condensed water cooled by the heat exchanger 14 is supplied to the water treatment chamber 40 of the water tank 38 from the treated water inlet 34 shown in FIG. A part of the condensed water or a gas in the condensed water may be discharged from the atmospheric discharge line 30. The condensed water in the water treatment chamber 40 comes into contact with the bag-like material 50. Since the bag-like product 50 has water permeability, the condensed water passes through the bag-like product 50. When the condensed water passes through the bag 50, it comes into contact with the ion exchange resin 48 in the bag 50, and impurities in the condensed water (for example, carbonic acid (carbonate ion, hydrogen carbonate ion), chloride ion, Sulfate ions, ammonium ions, iron ions, aluminum ions, etc.) are removed. The condensed water that has passed through the bag 50 passes through the communication path 46 as treated water and is stored in the water storage chamber 42. When supplying the treated water in the water storage chamber 42 to the fuel cell 10, the discharge pump 18 shown in FIG. 1 is operated to discharge the treated water in the water storage chamber 42 from the treated water outlet 36. The fuel cell 10 is supplied through the water discharge line 29 and the water supply line 26a.

  Since the water treatment device 12 of the present embodiment includes a water tank 38 that integrates a water treatment chamber 40 for performing water treatment and a water storage chamber 42 for storing treated water, the water treatment device and the storage tank are separately provided. It is suppressed that it becomes a larger installation space than the apparatus provided for. In addition, since the bag-like object 50 accommodated in the water treatment chamber 40 covers the water treatment chamber 40 side opening of the communication path 46, the water to be treated does not pass through the bag-like object 50. The flow into the water storage chamber 42 is suppressed. As a result, the ion exchange ability of the ion exchange resin 48 in the water treatment chamber 40 can be effectively utilized, and deterioration of the quality of the treated water is suppressed.

  Below, the other form of the water treatment apparatus which concerns on this embodiment is demonstrated.

  FIG. 3A is a schematic cross-sectional view showing another example of the configuration of the water treatment apparatus according to the present embodiment, and FIG. 3B is a schematic perspective view of the water treatment apparatus shown in FIG. It is. In FIG. 3B, the water treatment device is shown in a transparent view so that the internal structure of the water treatment device can be seen, and a bag-like material containing an ion exchange resin is omitted.

  In the water treatment device 12 shown in FIG. 3, a L-shaped partition wall 44 is provided in the water tank 38, and is divided into a water treatment chamber 40 and a water storage chamber 42 by the L-shaped partition wall 44. . The L-shaped partition wall 44 includes a bottom wall serving as a bottom surface of the water treatment chamber 40 and a side wall serving as a side surface of the water treatment chamber 40. In the present embodiment, a circular through hole is formed in the bottom wall, and this through hole serves as a communication path 46 that communicates the water treatment chamber 40 and the water storage chamber 42. And the bag-like object 50 is arrange | positioned in the water treatment chamber 40 so that the water treatment chamber 40 side opening part of the communicating path 46 may be covered. In addition, the installation location of the communicating path 46 is not limited to a bottom wall, For example, you may install in the side wall.

  4A is a schematic cross-sectional view showing another example of the configuration of the water treatment apparatus according to the present embodiment, and FIG. 4B is a schematic perspective view of the water treatment apparatus shown in FIG. It is. In FIG. 4B, the water treatment device is shown in a transparent view so that the internal structure of the water treatment device can be seen, and the bag-like material containing the ion exchange resin is omitted.

  The water treatment device 12 illustrated in FIG. 4 includes a first partition wall 44 that partitions the water treatment chamber 40 and the water storage chamber 42. At the upper end of the first partition wall 44, a linear through hole extending over the entire width of the first partition wall 44 is formed. That is, the first partition wall 44 extends from the bottom surface of the water tank 38 toward the top surface, and a predetermined interval is provided between the upper end of the first partition wall 44 and the top surface of the water tank 38. And this through-hole (space | interval between the upper end of the 1st partition 44 and the upper surface of the water tank 38) is the communicating path 46 which connects the water treatment chamber 40 and the water storage chamber 42. FIG. Moreover, the water treatment apparatus 12 of this embodiment has the 2nd partition 52 which divides the water treatment chamber 40 into a some chamber. In the present embodiment, the water treatment chamber 40 is divided into a water treatment first chamber 40 a and a water treatment second chamber 40 b by the second partition wall 52. A circular through hole is formed on the lower end side of the second partition wall 52, and this through hole serves as a communication passage 54 that connects the adjacent water treatment first chamber 40a and the water treatment second chamber 40b. Yes. The second partition wall 52 may be a partition group composed of a plurality of partition walls. For example, the plurality of partition walls may be arranged at a predetermined interval, and the water treatment chamber 40 may be partitioned into three or more chambers. .

  The water treatment first chamber 40a and the water treatment second chamber 40b contain water-permeable bags 50 containing the ion exchange resin 48, respectively, and these bag-like products 50 open the communication passage 54. (The water treatment first chamber 40a side opening and the water treatment second chamber 40b side opening) are covered.

  In the water treatment chamber 40 of the water treatment apparatus 12 of the present embodiment, the flow path through which condensed water (treated water) flows is a meandering flow path. Specifically, the treated water inlet 34 is installed in the upper part of the water treatment first chamber 40a, the communication path 54 of the second partition 52 is installed near the bottom of the water treatment first chamber 40, and the second partition 44 The communication path 46 is installed in the upper part of the water treatment second chamber 40b, the condensed water flowing through the water treatment first chamber 40a is caused to flow downward, and the condensed water flowing through the water treatment second chamber 40b is caused to flow upward. Serpentine flow path. By making the flow of the condensed water in the water treatment chamber 40 meandering in this way, it becomes possible to lengthen the flow path of the condensed water flowing in the bag-like object 50, so that the ion exchange in the water treatment chamber 40 The ion exchange ability of the resin 48 is utilized more effectively, and the water quality deterioration of treated water is further suppressed.

  FIG. 5A is a schematic cross-sectional view showing another example of the configuration of the water treatment device according to the present embodiment, and FIG. 5B is a schematic perspective view of the water treatment device shown in FIG. It is. FIG. 5B shows the water treatment device in a transparent view so that the internal structure of the water treatment device can be seen, and a bag-like material containing an ion exchange resin to be described later is omitted.

  In the water treatment apparatus 12 shown in FIG. 5, the partition wall 44 is a bottomed cylindrical body. And the bottomed cylindrical body which comprises the partition 44 is installed in the upper surface in the water tank 38, and the predetermined space | interval is opened between the bottom face in the water tank 38 and the bottom face of a bottomed cylindrical body. The bottomed cylindrical body constituting the partition wall 44 is partitioned into a water treatment chamber 40 and a water storage chamber 42. The inner side of the bottomed cylindrical body is a water treatment chamber 40, and the outer side of the bottomed cylindrical body is a water storage chamber 42. For example, a circular through hole is formed on the bottom surface of the bottomed cylindrical body constituting the partition wall 44, and this through hole serves as a communication path 46 that communicates the water treatment chamber 40 and the water storage chamber 42. Yes. And the bag-like thing 50 is arrange | positioned in the water treatment chamber 40 (inside a bottomed cylindrical body) so that the water treatment chamber 40 side opening part of the communicating path 46 may be covered. As shown in FIG. 5, the partition wall 44 is shaped like a bottomed tubular body, and the bag-like object 50 arranged inside the bottomed tubular body is made the same shape as the bottomed tubular body, Since the non-contact portion with the bag-like object 50 is reduced, the generation of wrinkles in the bag-like object 50 arranged inside the bottomed cylindrical body is suppressed, and the short path of the water to be treated is suppressed. Therefore, it is preferable that the partition wall 44 be a bottomed cylindrical body in that a short path of water to be treated is suppressed. In the water treatment device 12 shown in FIG. 5, the shape of the bottomed cylindrical body is a columnar shape, but is not limited thereto, and may be a prismatic shape, for example. Further, in the water treatment apparatus shown in FIG. 5, the through hole is formed on the bottom surface of the bottomed cylindrical body. However, the present invention is not limited to this. For example, the through hole is formed on the side surface of the bottomed cylindrical body. May be.

  As the shape of the bottomed cylindrical body, the columnar shape has no corners on the side surface, so that the non-contact portion between the side surface and the bag-like object 50 is further reduced, and the bottomed cylindrical body is formed inside the bottomed cylindrical body. A cylindrical bottomed cylindrical body is preferable in that the occurrence of wrinkles in the bag-like object 50 to be disposed is suppressed, thereby further suppressing a short path of water to be treated.

  In addition, the cylindrical bottomed cylindrical body is more effective in treating the treated water because the short path of the treated water is suppressed compared to the prismatic bottomed cylindrical body. Conceivable.

  6A is a schematic cross-sectional view showing another example of the configuration of the water treatment apparatus according to the present embodiment, and FIG. 6B is a schematic perspective view of the water treatment apparatus shown in FIG. 6A. It is. FIG. 6B shows the water treatment device in a transparent view so that the internal structure of the water treatment device can be seen, and a bag-like material containing an ion exchange resin described later is omitted.

  In the water treatment device 12 shown in FIG. 6, the water storage chamber 42 is partitioned into a first storage section 42a and a second storage section 42b, and the treated water in the first storage section 42a is passed over the second storage section 42b. An overflow wall 43 is provided for flow. The overflow wall 43 extends from the bottom surface of the water tank 38 toward the upper surface, and a predetermined interval is provided between the upper end of the overflow wall 43 and the upper surface of the water tank 38. Moreover, the treated water 1st outflow port 36a and the treated water 2nd outflow port 36b are arrange | positioned at the 2nd storage part 42b. In the water treatment device 12 shown in FIG. 6, the height position of the lower end of the treated water first outlet 36a is set to the height position of the upper end of the overflow wall 43 (one-dot broken line A shown in FIG. 6). In the water treatment device 12 shown in FIG. 6, the treated water second outlet 36 a is provided on the bottom surface of the second reservoir 42 b, and the height position of the treated water second outlet 36 b is the treated water first flow. It is set at a position lower than the height position of the outlet 36a. A treated water discharge line 29 (see FIG. 1) is connected to the second treated water outlet 36b, and a discharge line (not shown) is connected to the first treated water outlet 36a.

  The operation of the water treatment device 12 shown in FIG. 6 will be described below.

  The treated water treated in the water treatment chamber 40 is stored up to the height position of the upper end of the overflow wall 43 in the first reservoir 42a. Moreover, when the water level of the treated water in the first reservoir 42a exceeds the height position of the upper end of the overflow wall 43, the treated water in the first reservoir 42a exceeds the overflow wall 43, and the second reservoir It flows to 42b and is stored in the 2nd storage part 42b. When necessary, treated water is supplied from the treated water second outlet 36b to the fuel cell 10 through the treated water discharge line 29 (see FIG. 1). Further, when the amount of treated water treated in the water treatment chamber 40 exceeds the volume of the first reservoir 42a and the second reservoir 42b, the treated water is discharged from the first outlet 36a through a discharge line (not shown) to the outside of the system. Discharged.

  Here, in the case where a gas component such as carbon dioxide gas is contained in the treated water, in the water treatment apparatus in which the overflow wall 43 is not installed, the gas component flows out from the treated water second outlet 36b together with the treated water. There is a fear. However, in the water treatment apparatus provided with the overflow wall 43, the overflow wall 43 prevents the treated water containing the gas component from flowing into the treated water second outlet 36b as it is. The gas component is separated from the treated water with time and is stored in the space of the first reservoir 42a and the second reservoir 42b. Such a gas component is located at a position higher than the height position of the upper end of the overflow wall 43. It is possible to discharge from a certain treated water first outlet 36a. And the treated water in which the gas component was reduced can be discharged from the treated water second outlet 36b located at a position lower than the treated water first outlet 36a. Therefore, according to the water treatment apparatus 12 shown in FIG. 6, it becomes possible to discharge the treated water in which the amount of the gas component is reduced from the treated water containing a large amount of the gas component. And such a water treatment apparatus is used suitably as a water treatment apparatus with respect to the to-be-processed water which contains many carbon dioxide gas like the condensed water of a fuel cell.

  The height position of the upper end of the overflow wall 43 may be set as appropriate depending on the amount of treated water stored in the first storage part 42a and the second storage part 42b, but the ion exchange resin 48 in the bag 50 is dried. It is preferable to set it at a position higher than the height position of the ion exchange resin 48 accommodated in the bag-like object 50 (one-dot broken line B shown in FIG. 6). By setting the height position of the upper end of the overflow wall 43 to a position higher than the height position of the ion exchange resin 48, the water level in the first reservoir 42a and the water level in the preceding water treatment chamber 40 are ion-exchanged. It becomes possible to make it the height position or more of the resin 48. Even if the treated water is discharged from the second reservoir 42 b, the overflow level 43 causes the water level in the first reservoir 42 a and the water level in the water treatment chamber 40 to be higher than the height of the ion exchange resin 48. Since the ion exchange resin 48 is not lowered, the ion exchange resin 48 is immersed in water, and drying of the ion exchange resin 48 can be suppressed. As a result, it is possible to maintain the life and performance of the ion exchange resin 48.

  In the present embodiment, the height position of the lower end of the first treated water outlet 36a is particularly limited as long as it is set to be higher than the height position of the upper end of the overflow wall 43 (one-dot broken line A shown in FIG. 6). However, it is preferably located at the uppermost portion of the side surface of the water tank 38 in terms of securing the amount of water stored. In the present embodiment, the height position of the treated water second outlet 36b is not particularly limited as long as it is set to a position lower than the height position of the treated water first outlet 36a. In terms of preventing deterioration of water quality, it is preferable to provide the treated water second outlet 36b at the lowermost portion of the second reservoir 42b.

  FIG. 7A is a schematic cross-sectional view showing another example of the configuration of the water treatment device according to the present embodiment, and FIG. 7B is an exploded schematic perspective view of the water treatment device shown in FIG. FIG. In FIG. 7B, the water treatment apparatus is shown in a transparent view so that the internal structure of the water treatment apparatus can be seen, and a bag-like material containing an ion exchange resin to be described later is omitted.

  The water treatment device 12 shown in FIG. 7 is provided with a cylindrical overflow wall 43 arranged at a predetermined interval so as to surround a bottomed cylindrical body constituting the partition wall 44. In other words, a bottomed cylindrical body constituting the partition wall 44 is disposed inside the cylindrical overflow wall 43. Therefore, the outside of the bottomed cylindrical body and the inside of the cylindrical overflow wall 43 becomes the first storage part 42a, and the outside of the cylindrical overflow wall 43 becomes the second storage part 42b. The overflow wall 43 shown in FIG. 7 extends from the bottom surface of the water tank 38 toward the upper surface, and a predetermined interval is provided between the upper end of the overflow wall 43 and the upper surface of the water tank 38. Moreover, the treated water 1st outflow port 36a and the treated water 2nd outflow port 36b are arrange | positioned at the 2nd storage part 42b. In the water treatment device 12 shown in FIG. 7, the height position of the lower end of the treated water first outlet 36 a is set to the height position of the upper end of the overflow wall 43 (one-dot broken line A shown in FIG. 7). In the water treatment device 12 shown in FIG. 7, the treated water second outlet 36a is provided on the bottom surface of the second reservoir 42b, and the height position of the treated water second outlet 36b is the treated water first flow. It is set at a position lower than the height position of the outlet 36a. A treated water discharge line 29 (see FIG. 1) is connected to the treated water second outlet 36b, and a discharge line (not shown) is connected to the treated water first outlet 36a.

  The water tank 38 of the water treatment apparatus 12 shown in FIG. 7 is comprised from the main-body part 38a and the cover body 38b. And the water treatment apparatus 12 shown in FIG. 7 installs the bottomed cylindrical body which comprises the partition 44 in the cover body 38b side, for example, and the cylindrical shape larger than the said bottomed cylindrical body in the main-body part 38a. The overflow wall 43 is installed, and the lid 38b is placed on the main body 38a so that the cylindrical body having the partition wall 44 is disposed in the cylindrical overflow wall 43, and these are bonded. It is produced by sealing with an agent or the like.

  As described above, the water treatment apparatus 12 shown in FIG. 7 also includes the overflow wall 43, the treated water first outlet 36a, and the treated water second outlet 36b, so that it contains a large amount of gas components. It becomes possible to discharge the treated water in which the amount of the gas component is reduced from the treated water. Moreover, the ion exchange resin is set by setting the height position of the upper end of the overflow wall 43 to a position higher than the height position of the ion exchange resin 48 accommodated in the bag-like object 50 (one-dot broken line B shown in FIG. 7). The drying of 48 can also be suppressed.

  In the present embodiment, the height position of the lower end of the treated water first outlet 36a is particularly limited as long as it is set to be higher than the height position of the upper end of the overflow wall 43 (one-dot broken line A shown in FIG. 7). However, it is preferably located at the uppermost portion of the side surface of the water tank 38 in terms of securing the amount of water stored. In the present embodiment, the height position of the treated water second outlet 36b is not particularly limited as long as it is set to a position lower than the height position of the treated water first outlet 36a. In terms of preventing deterioration of water quality, it is preferable to provide the treated water second outlet 36b at the lowermost portion of the second reservoir 42b.

  In addition, it is desirable to install the overflow wall 43, the treated water first outlet 36a, and the treated water second outlet 36b described above also in the water treatment apparatus shown in FIGS.

  Below, each member of a water treatment apparatus is demonstrated.

  The water tank 38 is preferably formed of a material having high rigidity, and is formed of a material such as polypropylene, polyethylene, ABS resin, vinyl chloride, or acrylic. Among these, since the condensed water of the fuel cell is relatively high temperature, polypropylene resin is preferable from the viewpoint of heat resistance.

  The partition wall 44 (first partition wall 44, second partition wall 52) and overflow wall 43 are preferably formed of the same material as the water tank 38. The shape of the partition 44 is not particularly limited, such as a planar shape as shown in FIGS. 2 and 4, an L shape as shown in FIG. 3, a cylindrical shape as shown in FIG. The shape of the overflow wall 43 is not particularly limited.

  The hole shapes of the communication passage 46 and the communication passage 54 are not particularly limited, such as a circular shape or a straight shape. Moreover, the number of the communication paths 46 and the communication paths 54 should just be one or more, and should just be set suitably by the magnitude | size of the water tank 38, etc. Further, the dimensions of the communication passage 46 may be set as appropriate depending on the size of the water tank 38 and the like.

  Examples of the bag-like product 50 having water permeability include woven fabrics, knitted fabrics, and nonwoven fabrics obtained by weaving or knitting yarn in a net shape (net shape). The water-permeable bag-like product 50 used in the present embodiment is preferably made of a woven fabric or a knitted fabric, more preferably a knitted fabric, in terms of water permeability and stretchability. In particular, by using a bag-shaped object composed of a knitted fabric, the bag-shaped object 50 arranged so as to cover the opening of the communication path 46 (or the communication path 54) when the water to be treated is passed through the water tank 38; The generation of a gap between the communication passage 46 (or the communication passage 54) and the opening of the communication passage 46 (or the communication passage 54) is suppressed. Therefore, even if the amount of water to be treated is increased, impurities in the water to be treated can be efficiently removed.

  Here, the woven fabric, knitted fabric, and nonwoven fabric in the present embodiment have the following meanings. Woven fabric means a cross of warp and weft. Examples of the woven fabric include plain weave fabrics in which warp yarns and weft yarns are alternately crossed one by one, twill fabrics in which two or more warp yarns and weft yarns are continuously woven, and warp yarns of 5 or more weft yarns There are satin weaving fabrics, one of which is raised on the surface. Examples of commercially available “woven fabrics” include Saran (registered trademark) screen (Asahi Kasei Corporation), Dyneema (registered trademark) Cybermesh (Toyobo Co., Ltd.), and the like. The knitted fabric means a shape in which a single thread forms a loop (loop) and is connected two-dimensionally. Examples of the knitted fabric include a warp knitted fabric in which the loop is continuously knitted in the vertical direction, a knitted fabric in which the loop is continuously knitted in the horizontal direction, and the like. Examples of commercially available knitted fabrics include Tetnit (Toray Industries, Inc.) and Severis (Toray Industries, Inc.). Non-woven fabric means a fabric that is made into a sheet without being woven or knitted. Examples of commercially available non-woven fabrics include Ertas (Asahi Kasei Corporation) and Elves (Unitika Ltd.).

  Examples of the material of the bag-like product 50 having water permeability include polyester, polyurethane, polyvinylidene chloride, polypropylene, nylon, acrylic, and vinylon. Among these, polyester, polyurethane and the like are preferable in terms of stretchability. By using a bag 50 of polyester or polyurethane, when the water to be treated is passed through the water tank 38, the bag 50 is arranged so as to cover the opening of the communication passage 46 (or the communication passage 54). A gap between the opening of the passage 46 (or the communication passage 54) is suppressed, and a short path of the water to be treated (passing through the communication passage 46 or the communication passage 54 without contacting the bag-like object 50). Therefore, even if the amount of water to be treated is increased, impurities in the water to be treated can be efficiently removed.

  The type of yarn may be either a multifilament obtained by twisting a plurality of single yarns into a single yarn or a monofilament that is a single yarn. Of these, multifilaments are preferred in that they are stretchable and difficult to wrinkle. Further, the diameter (yarn diameter) of the filament constituting the bag-like product 50 having water permeability is preferably in the range of 50 μm to 400 μm, and more preferably in the range of 100 μm to 180 μm.

  The opening of the bag-like product 50 having water permeability may be an opening that prevents the filled ion exchange resin from leaking out of the bag-like product 50, but the water to be treated is efficiently introduced into the bag-like product 50. For example, a bag-like product having an opening in the range of 0.1 mm to 0.5 mm is used in that the ion exchange resin 48 inside the bag-like product 50 is prevented from leaking to the outside. It is preferable to use, more preferably, a bag having an opening in the range of 0.2 mm to 0.4 mm, and even more preferably a bag having an opening in the range of 0.27 mm to 0.36 mm. .

  The “opening” means the size of the opening of the bag-like object 50. If the opening is square, the length of the side, if it is rectangular, the length of the short side, if it is oval, Says the length of the short axis. The reason for referring to the short side or the short axis instead of the long side or the long axis is that, for example, if the horizontal interval is sufficiently narrow, even if the vertical interval is wide, only long and narrow eyes are opened. It is possible to suppress the exchange resin 48 from leaking outside the bag-like object 50. The opening of the bag-like object 50 is measured by, for example, a digital microscope (manufactured by Keyence Corporation, model: VH-8000).

  Further, the opening portion of the communication path 46 may be covered with a porous sheet formed of a woven fabric, a knitted fabric, a nonwoven fabric, or the like used for the bag-like product 50. That is, the bag-like object 50 is disposed so as to cover the opening of the communication path 46 through the sheet. Thereby, for example, even when the bag-like object 50 is damaged and the ion exchange resin flows out of the bag-like object 50, the ion exchange resin can be prevented from flowing through the communication passage 46 and the like to the subsequent stage.

The bag-like product 50 having water permeability is preferably a bag-like product having a tensile elongation of 20 mm or more and a tensile elongation of 25 mm or more when the tensile strength is 0.002 N / mm ^{2 in} terms of stretchability. It is more preferable to use a bag-like product having When a bag-like material having a tensile elongation of less than 20 mm is used at a tensile strength of 0.002 N / mm ² , when the water to be treated is passed through the water tank 38, the communication path 46 (or the communication path 54) A gap is generated between the bag-like object 50 arranged so as to cover the opening and the opening of the communication path 46 (or the communication path 54), and a short path of the water to be treated (the communication path without contacting the bag-like object 50) 46 or the communication passage 54) may occur. The tensile elongation of the bag-like product 50 is measured according to JIS L 1096 (2010 fabric and knitted fabric test method).

  The ion exchange resin 48 accommodated in the bag-like product 50 having water permeability is not particularly limited as long as it is an ion exchange resin that can be desalted. For example, a strong acid cation exchange resin, a weak acid cation exchange resin , Strong basic anion exchange resins, weak basic anion exchange resins, and the like. The bag-like product 50 having water permeability is filled with, for example, the ion exchange resin alone or in a mixed bed or multi-bed state.

  Examples of the cation exchange resin include cation exchange resins such as H form and Na form. Among these, an H-type cation exchange resin is preferable in terms of suppressing increase in the conductivity of the treated water. Examples of the anion exchange resin include anion exchange resins such as carbonate, bicarbonate, Cl, and OH. Among these, a carbonic acid type or a bicarbonate type anion exchange resin is preferable in that the volume shrinkage of the ion exchange resin 48 is small. When the carbonate type or bicarbonate type anion exchange resin is used, volumetric shrinkage of the ion exchange resin 48 is suppressed as the amount of water to be treated increases, so that the opening of the communication passage 46 (or the communication passage 54) is opened. A gap is generated between the bag-like object 50 arranged so as to be covered and the opening of the communication path 46 (or the communication path 54), and a short path of water to be treated is suppressed.

  Examples of the matrix structure of the cation exchange resin include styrene-based, phenol-based, acrylic-based, and methacrylic-based materials. In addition, examples of the base structure of the anion exchange resin include styrene, phenol, acrylic, and methacrylic groups. Among these, an ion exchange resin having a styrenic matrix structure is preferable from the viewpoint of heat resistance.

  The average particle size of the ion exchange resin 48 is, for example, preferably in the range of 0.4 mm to 1.0 mm, and more preferably in the range of 0.5 mm to 0.8 mm, in terms of suppressing leakage outside the bag-like product 50. .

  FIG. 8A is a schematic cross-sectional view showing a configuration of a water treatment apparatus of a reference example, and FIG. 8B is a schematic perspective view of the water treatment apparatus shown in FIG. 8A. FIG. 8B shows the water treatment apparatus in a transparent view so that the internal structure of the water treatment apparatus can be understood.

  The water treatment apparatus 12 shown in FIG. 8 includes a water tank 38 having a treated water inlet 34, a treated water first outlet 36 a and a treated water second outlet 36 b, and a water treatment chamber 40 and a water storage chamber 42 in the water tank 38. And partition walls 44 partitioned into (42a, 42b). The water treatment chamber 40 is a room for treating the condensed water (water to be treated) with the ion exchange resin, and the water storage chamber 42 is a room for storing the treated water treated with the ion exchange resin. A condensed water supply line 28 shown in FIG. 1 is connected to the treated water inlet 34. In addition, although the to-be-processed water inflow port 34 is arrange | positioned at the upper part of the water tank 38, the position will not be restrict | limited especially if the to-be-processed water can be supplied to the water treatment chamber 40. FIG.

  A circular through hole is formed on the lower end side of the partition wall 44 provided in the water tank 38. This through hole serves as a communication path 46 that communicates the water treatment chamber 40 and the water storage chamber 42. The position, size, shape, and the like of the communication path 46 are appropriately set depending on the size of the water tank 38, and are not particularly limited.

  Further, the water treatment device 12 shown in FIG. 8 includes a porous sheet 51. The porous sheet 51 is a sheet-like woven fabric, knitted fabric, or nonwoven fabric used for the bag-like product 50 described above. That is, the porous sheet 51 has the same material, physical properties, etc. as the bag-like material 50 described above. The porous sheet 51 covers the water treatment chamber 40 side opening of the communication path 46. The porous sheet 51 is fixed to the partition wall 44 with an adhesive or the like. In the reference example, the water storage chamber 42 side opening of the communication path 46 may be covered.

  Further, the water treatment device 12 shown in FIG. 8 includes an ion exchange resin 48. Although the ion exchange resin 48 is filled in the water treatment chamber 40, the height of the ion exchange resin 48 in the water treatment chamber 40 is higher than the height position of the upper end of the opening on the water treatment chamber 40 side. In addition, the water treatment chamber 40 needs to be filled. When the height of the ion exchange resin 48 in the water treatment chamber 40 is equal to or lower than the height position of the upper end of the opening on the water treatment chamber 40 side, a part of the water to be treated that flows into the water treatment chamber 40 is ionized. There is a risk of passing through the communication path 46 without contacting the exchange resin 40.

  8 divides the water storage chamber 42 into a first storage part 42a and a second storage part 42b, and the treated water in the first storage part 42a is supplied to the second storage part 42b. An overflow wall 43 for overflowing is provided. The overflow wall 43 extends from the bottom surface of the water tank 38 toward the upper surface, and a predetermined interval is provided between the upper end of the overflow wall 43 and the upper surface of the water tank 38. Moreover, the treated water 1st outflow port 36a and the treated water 2nd outflow port 36b are arrange | positioned at the 2nd storage part 42b. In the water treatment device 12 shown in FIG. 8, the height position of the lower end of the treated water first outlet 36a is set to the height position of the upper end of the overflow wall 43 (one-dot broken line A shown in FIG. 8). In the water treatment device 12 shown in FIG. 8, the treated water second outlet 36a is provided on the bottom surface of the second reservoir 42b, but the height of the treated water second outlet 36b is the first treated water. What is necessary is just to set to the position lower than the height position of the outflow port 36a. A treated water discharge line 29 (see FIG. 1) is connected to the second treated water outlet 36b, and a discharge line (not shown) is connected to the first treated water outlet 36a.

  The height position of the upper end of the overflow wall 43 may be set as appropriate depending on the amount of treated water stored in the first storage part 42a and the second storage part 42b, but water is used in order to prevent the ion exchange resin 48 from drying. It is preferable to set the position higher than the height position of the ion exchange resin 48 filled in the processing chamber 40 (one-dot broken line B shown in FIG. 8).

  Moreover, if the height position of the lower end of the treated water 1st outflow port 36a is set more than the height position (one-dot broken line A shown in FIG. 8) of the upper end of the overflow wall 43, it will not be restrict | limited. In view of securing the amount of water stored, it is preferable to be located at the uppermost portion of the side surface of the water tank 38. In the present embodiment, the height position of the treated water second outlet 36b is not particularly limited as long as it is set to a position lower than the height position of the treated water first outlet 36a. In terms of preventing deterioration of water quality, it is preferable to provide the treated water second outlet 36b at the lowermost portion of the second reservoir 42b.

  FIG. 9A is a schematic cross-sectional view showing a configuration of a water treatment apparatus of another reference example, and FIG. 9B is an exploded schematic perspective view of the water treatment apparatus shown in FIG. 9A. FIG. 9B shows the water treatment device in a transparent view so that the internal structure of the water treatment device can be understood.

  The water treatment apparatus 12 shown in FIG. 9 includes a bottomed cylindrical partition wall 44. And the bottomed cylindrical body which comprises the partition 44 is installed in the upper surface in the water tank 38, and the predetermined space | interval is opened between the bottom face in the water tank 38 and the bottom face of a bottomed cylindrical body. The bottomed cylindrical body constituting the partition wall 44 is partitioned into a water treatment chamber 40 and a water storage chamber 42. The inner side of the bottomed cylindrical body is a water treatment chamber 40, and the outer side of the bottomed cylindrical body is a water storage chamber 42. For example, a circular through hole is formed on the bottom surface of the bottomed cylindrical body constituting the partition wall 44, and this through hole serves as a communication path 46 that communicates the water treatment chamber 40 and the water storage chamber 42. Yes. The water treatment device 12 illustrated in FIG. 9 includes a porous sheet 51, and the porous sheet 51 covers the water treatment chamber 40 side opening of the communication path 46. The porous sheet 51 is fixed to the partition wall 44 with an adhesive or the like. In the reference example, the water storage chamber 42 side opening of the communication path 46 may be covered. In the water treatment device 12 shown in FIG. 9, the shape of the bottomed cylindrical body is a cylindrical shape, but is not limited thereto, and may be, for example, a prismatic shape. Moreover, in the water treatment apparatus 12 shown in FIG. 9, although the through-hole is formed in the bottom face of a bottomed cylindrical body, it is not restricted to this, For example, a through-hole is provided in the side surface of a bottomed cylindrical body. It may be formed.

  As the shape of the bottomed cylindrical body, the columnar type has no corners on the side surface, so that the non-contact portion between the side surface and the ion exchange resin 48 is reduced, so that a short path for water to be treated is reduced. A cylindrical bottomed cylindrical body is preferable in that it is suppressed.

  In addition, the cylindrical bottomed cylindrical body is more effective in treating the treated water because the short path of the treated water is suppressed compared to the prismatic bottomed cylindrical body. Conceivable.

  Further, the water treatment device 12 shown in FIG. 9 includes an ion exchange resin 48. The ion exchange resin 48 is filled in the water treatment chamber 40, that is, in the bottomed cylindrical body. Here, when the communication path 46 is formed on the bottom surface of the bottomed cylindrical body, the entire bottom surface of the bottomed cylindrical body needs to be filled with the ion exchange resin 48. When the communication path 46 is formed on the side surface, the height of the ion exchange resin 48 in the water treatment chamber 40 (in the bottomed cylindrical body) is such that the water treatment chamber 40 side opening (bottomed cylindrical body side surface opening). It is necessary to fill the water treatment chamber 40 so as to be higher than the height position of the upper end of).

  The water treatment device 12 shown in FIG. 9 includes a cylindrical overflow wall 43 arranged at a predetermined interval so as to surround a bottomed cylindrical body constituting the partition wall 44. In other words, a bottomed cylindrical body constituting the partition wall 44 is disposed inside the cylindrical overflow wall 43. Therefore, the outside of the bottomed cylindrical body and the inside of the cylindrical overflow wall 43 becomes the first storage part 42a, and the outside of the cylindrical overflow wall 43 becomes the second storage part 42b. The overflow wall 43 shown in FIG. 9 extends from the bottom surface of the water tank 38 toward the upper surface, and a predetermined interval is provided between the upper end of the overflow wall 43 and the upper surface of the water tank 38. Moreover, the treated water 1st outflow port 36a and the treated water 2nd outflow port 36b are arrange | positioned at the 2nd storage part 42b. In the water treatment device 12 shown in FIG. 9, the height position of the lower end of the treated water first outlet 36 a is set to the height position of the upper end of the overflow wall 43 (one-dot broken line A shown in FIG. 9). In the water treatment device 12 shown in FIG. 9, the treated water second outlet 36a is provided on the bottom surface of the second reservoir 42b, and the height position of the treated water second outlet 36b is the treated water first flow. It is set at a position lower than the height position of the outlet 36a. A treated water discharge line 29 (see FIG. 1) is connected to the treated water second outlet 36b, and a discharge line (not shown) is connected to the treated water first outlet 36a.

  The water tank 38 of the water treatment apparatus 12 shown in FIG. 9 is comprised from the main-body part 38a and the cover body 38b. And the water treatment apparatus 12 shown in FIG. 9 installs the bottomed cylindrical body which comprises the partition 44 in the cover body 38b side, for example, and is larger cylindrical shape than the said bottomed cylindrical body in the main-body part 38a. The overflow wall 43 is installed, and the lid 38b is placed on the main body 38a so that the cylindrical body having the partition wall 44 is disposed in the cylindrical overflow wall 43, and these are bonded. It is produced by sealing with an agent or the like.

  9 also sets the height position of the upper end of the overflow wall 43 to a position higher than the height position of the ion exchange resin 48 (one-dot broken line B shown in FIG. 9). Thus, drying of the ion exchange resin 48 can be suppressed.

  In the present embodiment, the height position of the lower end of the treated water first outlet 36a is particularly limited as long as it is set to be higher than the height position of the upper end of the overflow wall 43 (one-dot broken line A shown in FIG. 9). However, it is preferably located at the uppermost portion of the side surface of the water tank 38 in terms of securing the amount of water stored. In the present embodiment, the height position of the treated water second outlet 36b is not particularly limited as long as it is set to a position lower than the height position of the treated water first outlet 36a. In terms of preventing deterioration of water quality, it is preferable to provide the treated water second outlet 36b at the lowermost portion of the second reservoir 42b.

  In addition, as another reference example, in the water treatment apparatus shown in FIGS. 3 and 4, a water treatment apparatus in which a porous sheet 51 and an ion exchange resin 48 are installed instead of the bag-like material 50 can be cited.

  Hereinafter, although an example and a comparative example are given and the present invention is explained more concretely in detail, the present invention is not limited to the following examples.

Example 1
Using the water treatment apparatus shown in FIG. 3, the water to be treated having a hydrochloric acid concentration of 1686 mg / L was treated. The dimensions of the water tank used in Example 1 are 160 mm wide x 280 mm long x 160 mm high, the dimensions of the water treatment chamber are 160 mm wide x 170 mm long x 100 mm high, and the communication path extends from the bottom of the water tank. The hole diameter is 10 mm in the 20 mm portion. The water-permeable bag-like product used in Example 1 is a knitted fabric (warp knitting, product number: T4040, trade name: Tetnit, manufacturer: Toray Co., Ltd.) using polyester fibers, and the volume of the bag-like product is 1200 mL, The opening is 0.36 mm, the yarn diameter is 0.10 mm (44 dtex), the yarn type is multifilament (18F), and the tensile elongation is 25 mm when the tensile strength is 0.002 N / mm ² . As the ion exchange resin of Example 1, OH type styrene anion exchange resin (Dow Chemical Co., AMBERJET ESG 4002 (OH)) and H type styrene cation exchange resin (Dow Chemical Co., AMBERLITE IRN97 H) are used. Used, the bag was filled with 1000 mL of the anion exchange resin and 200 mL of the cation exchange resin. The opening of the bag-like material is a value measured with a digital microscope (manufactured by Keyence Corporation, model: VH-8000). The same applies to the following examples and comparative examples.

The aqueous hydrochloric acid solution was supplied to the water treatment apparatus of Example 1 under a water flow condition of a flow rate of 30 mL / min and SV1.5 h- ¹ . Then, until the conductivity of the treated water discharged from the water treatment apparatus of Example 1 reaches 50 μS / cm (until the hydrochloric acid concentration in the treated water reaches 5% of the hydrochloric acid concentration in the treated water), The amount of treated water that could be passed through the treatment apparatus was measured.

(Example 2)
The water to be treated having a hydrochloric acid concentration of 1686 mg / L was treated with the water treatment apparatus shown in FIG. The dimensions of the water tank used in Example 2 are 160 mm wide × 280 mm long × 160 mm high, and the dimensions of the water treatment first chamber and the second chamber are 160 mm wide × 35 mm long × 160 mm high, respectively. The hole diameter of the communication path of the second partition wall is 10 mm. The width of the communication path of the first partition (the width from the partition upper end to the water tank upper surface) is 20 mm. The other conditions are the same as in Example 1, and the conductivity of the treated water discharged from the water treatment apparatus of Example 2 reaches 50 μS / cm (the concentration of hydrochloric acid in the treated water is the concentration of hydrochloric acid in the treated water) The amount of water to be treated that was able to be passed through the water treatment device was measured until the amount reached 5%.

(Comparative Example 1)
FIG. 10A is a schematic cross-sectional view showing the configuration of the water treatment device of Comparative Example 1, and FIG. 10B is a schematic perspective view of the water treatment device shown in FIG. 10A. FIG. 10B shows the water treatment device in a transparent view so that the internal structure of the water treatment device of Comparative Example 1 can be seen, and the bag-like material containing the ion exchange resin is omitted.

  The water treatment apparatus 13 of Comparative Example 1 includes a water tank 64 having a treated water inlet 60 and a treated water outlet 62, a partition wall 70 that partitions the water tank 64 into a water treatment chamber 66 and a water storage chamber 68, and ion exchange. A water-permeable bag 74 containing the resin 72. A linear through hole extending across the entire width of the partition wall 70 is formed at the lower end of the partition wall 70, and this through hole communicates with the water treatment chamber 66 and the water storage chamber 68. It has become. The water treatment chamber 66 is provided with a water-permeable bag 74 containing the ion exchange resin 72, but the bag 74 is not disposed so as to cover the opening of the communication path 76, A gap is formed between the bag 74 and the opening of the communication path 76. The same ion exchange resin 72 and bag-like material 74 as in Example 1 were used.

  The dimensions of the water tank 64 used in Comparative Example 1 are 160 mm wide × 280 mm long × 160 mm high, and the dimensions of the water treatment chamber 66 are 160 mm wide × 170 mm long × 160 mm high. The width (width from the lower end of the partition wall 70 to the bottom surface of the water tank 64) is 20 mm. The other conditions were the same as in Example 1, and the conductivity of the treated water discharged from the water treatment device 13 of Comparative Example 1 reached 50 μS / cm (the concentration of hydrochloric acid in the treated water was the same as the concentration of hydrochloric acid in the treated water) The amount of water to be treated that was able to be passed through the water treatment device was measured until the amount reached 5%.

  FIG. 11 is a diagram illustrating the results of the amount of water to be treated in the water treatment apparatuses of Examples 1 and 2 and Comparative Example 1. As shown in FIG. 11, the water flow rate of the water treatment device of Comparative Example 1 was 0.8 (L / LR), but the water flow rate of the water treatment devices of Examples 1 and 2 was 9.2. (L / LR), 16.2 (L / LR), and a higher water flow rate than the water treatment device of Comparative Example 1 was obtained. Also, the flow capacity (BT cap (eq / LR) and total exchange capacity (eq / LR) are determined from the chloride ion concentration and the flow rate of chloride ion, and the utilization rate of ion exchange resin ( B. T. cap / total exchange capacity) was calculated and the results are summarized in Table 1.

  As can be seen from Table 1, the utilization rate of the ion exchange resin of the water treatment device of Comparative Example 1 was 3%, but the utilization rate of the ion exchange resin of the water treatment devices of Examples 1 and 2 was 34%, 60%. %, A higher utilization rate than the water treatment device of Comparative Example 1 was obtained. That is, it can be said that the ion exchange ability of the ion exchange resin could be effectively utilized by arranging the water-permeable bag-like material containing the ion exchange resin so as to cover the opening of the communication path. In particular, it can be said that the water treatment apparatus of Example 2 having a water treatment chamber in which a meandering flow path in which the water to be treated flows meandered the ion exchange ability of the ion exchange resin more effectively.

(Comparative Examples 2 to 4)
In the comparative example 2, it tested on the conditions similar to the comparative example 1 except having used the water-permeable bag-like thing comprised from the textile fabric (plain weave) (part number: PE-80) using a polyethylene fiber. The volume of the bag-like material used in Comparative Example 2 was 1200 mL, the mesh opening was 0.27 mm, the yarn diameter was 0.12 mm (120 dtex), the yarn type was monofilament, the mesh structure was 64 pieces / inch, and the tensile strength was 0. The tensile elongation at 002 N / mm ² is 0.7 mm.

In the comparative example 3, it tested on the conditions similar to the comparative example 1 except having used the water-permeable bag-like thing comprised from the textile fabric (plain weave) (product number: PET-300) using a polyester fiber. The volume of the bag-like material used in Comparative Example 3 was 1200 mL, the mesh opening was 0.30 mm, the thread diameter was 0.14 mm, the thread type was monofilament, the mesh structure was 57 pieces / inch, and the tensile strength was 0.002 N / mm ^2. The tensile elongation at this time is 0.2 mm.

In Comparative Example 4, a water-permeable bag-like material composed of a woven fabric (plain weave) (product number: N-50, trade name: Saran (registered trademark) screen, manufacturer: Asahi Kasei Corporation) using polyvinylidene chloride fiber was used. The test was performed under the same conditions as in Comparative Example 1 except that they were used. The volume of the bag-like material used in Comparative Example 4 was 1200 mL, the mesh opening was 0.32 mm, the yarn diameter was 0.18 mm (440 dtex), the yarn type was monofilament, the mesh structure was 50 pieces / inch, and the tensile strength was 0. The tensile elongation at 002 N / mm ² is 1.1 mm.

  Until the conductivity of the treated water discharged from the water treatment apparatuses of Comparative Examples 2 to 4 reaches 50 μS / cm (until the hydrochloric acid concentration in the treated water reaches 5% of the hydrochloric acid concentration in the treated water), The amount of treated water that could be passed through the treatment apparatus was measured.

  FIG. 12 is a diagram illustrating the results of the amount of water to be treated in the water treatment apparatuses of Comparative Examples 1 to 4. As shown in FIG. 12, the water flow rate of the water treatment apparatuses of Comparative Examples 1 to 4 was 1.5 (L / LR) or less, which was a very low value.

(Examples 3 to 5)
In Example 3, it tested on the conditions similar to Example 1 except having used the water-permeable bag-like thing comprised from the textile fabric (plain weave) (product number: PET-300) using a polyester fiber. The volume of the bag-like material used in Example 3 was 1200 mL, the mesh opening was 0.30 mm, the thread diameter was 0.14 mm, the thread type was monofilament, the mesh structure was 57 pieces / inch, and the tensile strength was 0.002 N / mm ^2. The tensile elongation at this time is 0.2 mm.

In Example 4, it tested on the conditions similar to Example 1 except having used the water-permeable bag-like thing comprised from the textile fabric (plain weave) (product number: PE-80) using a polyethylene fiber. The volume of the bag-like material used in Example 4 was 1200 mL, the mesh opening was 0.27 mm, the yarn diameter was 0.12 mm (120 dtex), the yarn type was monofilament, the mesh structure was 64 pieces / inch, and the tensile strength was 0. The tensile elongation at 002 N / mm ² is 0.7 mm.

In Example 5, a water-permeable bag-like material composed of a woven fabric (plain weave) (product number: N-50, trade name: Saran (registered trademark) screen, manufacturer: Asahi Kasei Corporation) using polyvinylidene chloride fibers was used. The test was performed under the same conditions as in Example 1 except that they were used. The volume of the bag-like material used in Example 5 was 1200 mL, the opening was 0.32 mm, the yarn diameter was 0.18 mm (440 dtex), the yarn type was monofilament, the mesh structure was 50 pieces / inch, and the tensile strength was 0. The tensile elongation at 002 N / mm ² is 1.1 mm.

  Until the conductivity of the treated water discharged from the water treatment apparatuses of Examples 3 to 5 reaches 50 μS / cm (until the hydrochloric acid concentration in the treated water reaches 5% of the hydrochloric acid concentration in the treated water), The amount of treated water that could be passed through the treatment apparatus was measured.

  FIG. 13 is a diagram illustrating the results of the amount of water to be treated in the water treatment apparatuses of Examples 1 and 3 to 5. As shown in FIG. 13, the water flow rate of the water treatment device of Example 1 using a water-permeable bag-like material composed of polyester fiber knitted fabric (warp knitting) is 9.2 (L / LR). It was a value higher than the water flow rate of the water treatment devices of other examples.

  Further, the flow-through capacity (BT cap (eq / LR) and total exchange capacity (eq / L-R) from the water flow rate of the water treatment apparatuses of Examples 1 and 3 to 5 and the chloride ion concentration passed through. R) was calculated, and the utilization rate (BT cap / total exchange capacity) of the ion exchange resin was calculated, and the results are summarized in Table 2.

  As can be seen from Table 2, the utilization rate of the ion exchange resin is the highest in the water treatment apparatus of Example 1 using a water-permeable bag-like material composed of a knitted fabric (warp knitting) using polyester fibers. there were. That is, it can be said that the ion exchange ability of the ion exchange resin could be utilized more effectively by using a water-permeable bag-like material composed of a knitted fabric.

(Reference example)
A water-permeable bag A composed of a knitted fabric (warp knitting) using polyester fibers, a water-permeable bag B composed of a woven fabric (plain weave) using polyvinylidene chloride fibers, and polyethylene fibers were used. Water-permeable bag-like product C composed of woven fabric (plain weave), water-permeable bag-like product composed of knitted fabric (polyester 84% + polyurethane 16% blend (warp knitting)) using polyester fiber and polyurethane fiber D, the tensile elongation of each of the water-permeable bag-like materials E composed of a woven fabric (plain weave) using polyester fibers is measured in accordance with JIS L 1096 (2010 woven fabric and knitted fabric testing method) as follows. Measured under conditions.
Test piece: A bag-like material is cut into a 10 mm × 15 mm strip. Tensile tester: NMB (Minbia, TCN-1 km)
Pulling speed: 10mm / min
Between chucks: 90 mm
Maximum load: 1kgf (converted to N at × 9.8)

FIG. 14 is a diagram showing the results of the tensile elongation of the bag-like objects A to E. The vertical axis represents the tensile strength of the test piece, and the horizontal axis represents the tensile elongation of the test piece. As shown in FIG. 14, when the tensile strength is 0.002 N / mm ² , the bag-like product having a tensile elongation of 20 mm or more is a water-permeable bag composed of a knitted fabric (warp knitting) using polyester fibers. It was a water-permeable bag-like product D composed of a knitted product (warp knitting) using a product A, polyester fiber and polyurethane fiber. In particular, when the tensile strength was 0.002 N / mm ² , the largest value of the tensile elongation was the water-permeable bag-like material composed of a knitted fabric (warp knitting) using polyester fibers and polyurethane fibers. D.

DESCRIPTION OF SYMBOLS 1 Fuel cell system, 10 Fuel cell, 12, 13 Water treatment apparatus, 14 Heat exchanger, 18 Discharge pump, 22 Air supply line, 24 Fuel supply line, 26a, 26b Water supply line, 28 Condensate supply line, 29 Treatment Water discharge line, 30 Atmospheric discharge line, 32 Warm water supply line, 34, 60 To-be-treated water inlet, 36, 62 Treated water outlet, 36a Treated water first outlet, 36b Treated water second outlet, 38, 64 water tank, 38a main body, 38b lid, 40, 66 water treatment chamber, 40a water treatment first chamber, 40b water treatment second chamber, 42, 68 water reservoir, 42a first reservoir, 42b second reservoir, 43 Flow wall, 44, 70 partition wall (first partition wall), 46, 54, 76 communication path, 48, 72 ion exchange resin, 50, 74 bag-like material, 51 porous sheet, 52 second partition wall.

Claims (11)

A tank,
A partition partitioning the inside of the water tank into a water treatment chamber in which treated water is treated and a water storage chamber in which treated water treated in the water treatment chamber is stored,
Containing ion-exchange resin and having water permeability, and
The partition wall is a bottomed cylindrical body, the inside of the bottomed cylindrical body is the water treatment chamber, the outside of the bottomed cylindrical body is the water storage chamber,
The bottom surface of the bottomed cylindrical body is provided with a communication path that communicates the water treatment chamber and the water storage chamber,
The said bag-shaped object is arrange | positioned in the said water treatment chamber so that the water treatment chamber side opening part of the said communicating path may be covered, The water treatment apparatus characterized by the above-mentioned. A tank,
A first partition that divides the water tank into a water treatment chamber in which water to be treated is treated and a water storage chamber in which treated water treated in the water treatment chamber is stored;
A second partition partitioning the water treatment chamber into at least a first chamber and a second chamber;
Containing ion-exchange resin and having water permeability, and
The first partition wall and the second partition wall are provided with communication passages that allow communication between adjacent chambers,
The water treatment apparatus, wherein the bag-like object is disposed in the first chamber and the second chamber so as to cover an opening portion of the communication path of the second partition wall. The water storage chamber is divided into a first storage part and a second storage part, and an overflow wall is provided for overflowing the treated water in the first storage part to the second storage part,
In the second reservoir, a treated water first outlet and a treated water second outlet are arranged,
The height position of the lower end of the treated water first outlet is set to be higher than the height position of the upper end of the overflow wall, and the height position of the treated water second outlet is the height of the treated water first outlet. Set to a position lower than the height position,
3. The water according to claim 1, wherein a height position of an upper end of the overflow wall is set to a position higher than an upper end of the ion exchange resin accommodated in the bag-like object. Processing equipment.   The water treatment apparatus according to claim 2, wherein the water treatment chamber is formed with a meandering flow path in which the water to be treated is meandering. The bag-like object has a tensile strength of 0.002 N / mm water treatment apparatus according to any one of claims 1 to 4, characterized in that it has a 20mm or more tensile elongation at ^2. The water treatment apparatus according to any one of claims 1 to 5 , wherein the bag-like object is constituted by a knitted fabric using fibers. The ion-exchange resin, water treatment apparatus according to any one of claims 1 to 6, characterized in that it comprises an anion exchange resin of carbonate type. The water treatment apparatus according to any one of claims 1 to 7 , wherein the treated water is condensed water discharged from a fuel cell. The water treatment method characterized by processing to-be-processed water using the water treatment apparatus of any one of the said Claims 1-8 . A water tank, and a partition wall that divides the water tank into a water treatment chamber in which treated water is treated and a water storage chamber in which treated water treated in the water treatment chamber is stored, wherein the partition wall has a bottom. A cylindrical body, the inside of the bottomed cylindrical body is the water treatment chamber, the outside of the bottomed cylindrical body is the water storage chamber, and the bottom surface of the bottomed cylindrical body has the A bag-like material having water permeability used in a water tank unit provided with a communication path for communicating a water treatment chamber and the water storage chamber,
The bag-like material is disposed in the water treatment chamber so as to contain an ion exchange resin and cover the water treatment chamber-side opening of the communication path. A water tank, a water treatment chamber in which the treated water is treated in the water tank, a first partition partitioning into a water storage chamber in which treated water treated in the water treatment chamber is stored, and at least the water treatment chamber A second partition partitioning into one chamber and a second chamber, wherein the first partition wall and the second partition wall have water permeability used in a water tank unit provided with a communication passage that communicates between adjacent chambers. Having a bag-like material,
The bag-like article is characterized in that the bag-like article is disposed in the first chamber and the second chamber so as to accommodate an ion exchange resin and cover the opening of the communication path of the second partition wall.