Transfer piping construction

Abstract

Remove any contaminated ion exchange resin. [Solution] The transfer piping structure 1A includes a first transfer piping 11 for discharging the anion exchange resin 9a housed in the separation tower 51. The first transfer piping 11 is connected to the separation tower 51 and includes a first discharge piping section 111, a first connecting piping section 112 connected to the end of the first discharge piping section 111 and extending from the end of the first discharge piping section 111 toward a first transfer direction, a first connecting piping section 113 connected to the end of the first connecting piping section 112 and extending along a first discharge axis A111 and discharging the anion exchange resin 9a, and a first capture piping section 115 connected to the end of the first discharge piping section 111 and extending from the end of the first discharge piping section 111 toward a first capture direction that includes a directional component opposite to the first transfer direction along the first piping axis A112 and captures the cation exchange resin 9c.

Description

Technical Field

[0001] The present invention relates to a transfer pipe structure.

Background Art

[0002] Patent Document 1 discloses a condensate desalination device installed in a power plant. The condensate desalination device performs desalination treatment using a mixed ion exchange resin in which a strongly acidic cation exchange resin and a strongly basic anion exchange resin are mixed. The mixed ion exchange resin is periodically withdrawn from the desalination tower and subjected to regeneration treatment.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There may be a need to separate anion exchange resin and cation exchange resin having different specific gravities from each other. In an anion exchange resin and a cation exchange resin mixed in a stationary liquid, the anion exchange resin having a relatively small specific gravity gathers above in the liquid, and the cation exchange resin having a relatively large specific gravity gathers below in the liquid. Separation methods utilizing such a principle are widely known. For example, the condensate desalination device disclosed in Patent Document 1 takes the mixed ion exchange resin withdrawn from the desalination tower into the regeneration tower and separates it into a strongly acidic cation exchange resin and a strongly basic anion exchange resin using the density difference.

[0005] However, even in a collection of relatively low-density anion exchange resins that appears to have separated macroscopically, a small amount of relatively high-density cation exchange resin may be present when viewed microscopically. Similarly, even in a collection of relatively high-density cation exchange resins that appears to have separated macroscopically, a small amount of relatively low-density anion exchange resin may be present when viewed microscopically.

[0006] The present invention provides a transfer piping structure capable of removing contaminated ion exchange resin. [Means for solving the problem]

[0007] One embodiment of the present invention is a transfer piping structure connected to a mixture storage section containing a mixture of a first ion exchange resin and a second ion exchange resin, for discharging the first ion exchange resin and / or the second ion exchange resin, comprising a first transfer piping for discharging the first ion exchange resin from the mixture storage section, the first transfer piping comprising a first discharge piping section connected to the mixture storage section and extending along a first discharge axis intersecting the wall surface of the mixture storage section, and a second transfer piping section connected to the end of the first discharge piping section and intersecting the first discharge axis The system includes: a first connecting piping section extending from the end of a first outlet piping section in a first transport direction along the first piping axis; a first connecting piping section connected to the end of the first connecting piping section, extending along the first outlet axis and discharging a first ion exchange resin; and a first capturing piping section connected to the end of the first outlet piping section, extending from the end of the first outlet piping section in a first capturing direction that includes a directional component opposite to the first transport direction along the first piping axis and capturing a second ion exchange resin.

[0008] According to this transfer piping structure, when the aggregate of the first ion exchange resin and the second ion exchange resin mixed in with the aggregate move through the first discharge piping section, the second ion exchange resin is separated from the aggregate of the first ion exchange resin based on the difference in specific gravity. The aggregate of the first ion exchange resin is then discharged through the first connecting piping section and the first linking piping section, and the second ion exchange resin captured in the first capture piping is not discharged together with the aggregate of the first ion exchange resin. Therefore, the second ion exchange resin can be reliably removed from the aggregate of the first ion exchange resin.

[0009] In the above-described transfer piping structure, the end of the first capture piping section opposite to the end connected to the first discharge piping section may be closed. This configuration ensures that the second ion exchange resin is reliably removed from the collection of the first ion exchange resin.

[0010] In the above-described transfer piping structure, the first piping axis may be perpendicular to the first outlet axis. This configuration also ensures that the second ion exchange resin is reliably removed from the aggregate of the first ion exchange resin.

[0011] In the above-described transfer piping structure, the angle between the first output axis and the first piping axis may be obtuse. This configuration increases the area for separating the second ion exchange resin from the aggregate of the first ion exchange resin. As a result, the second ion exchange resin can be reliably removed from the aggregate of the first ion exchange resin.

[0012] In the above-described transfer piping structure, the angle between the first output axis and the first piping axis may be acute. This configuration also ensures that the second ion exchange resin is reliably removed from the aggregate of the first ion exchange resin.

[0013] The above transfer piping structure may further include a first additional transfer piping connected to the first transfer piping and receiving the first ion exchange resin discharged from the first transfer piping, wherein the first additional transfer piping includes a first additional connecting piping section connected to the end of the first connecting piping section and extending from the end of the first connecting piping section toward the first transfer direction, a first additional connecting piping section connected to the end of the first additional connecting piping section and extending from the first additional connecting piping section along a first additional output axis parallel to the first output axis and discharging the first ion exchange resin, and a first additional capturing piping section connected to the end of the first connecting piping section and extending from the end of the first additional connecting piping section toward the first capturing direction and capturing the second ion exchange resin. With this configuration, the second ion exchange resin can be removed even more reliably from the collection of the first ion exchange resin.

[0014] In the above-described transfer piping structure, the end of the first capture piping section opposite to the end connected to the first discharge piping section may be connected to the first connecting piping section. This configuration also allows for the removal of the second ion exchange resin from the collection of the first ion exchange resin.

[0015] The above transfer piping structure further comprises a second transfer piping for discharging the second ion exchange resin from the mixture containment section, the second transfer piping may include: a second discharge piping section connected to the mixture containment section and extending along a second discharge axis intersecting the wall surface of the mixture containment section; a second connecting piping section connected to the end of the second discharge piping section and extending from the end of the second discharge piping section in a second transfer direction opposite to the first transfer direction, along a second piping axis intersecting the second discharge axis; a second connecting piping section connected to the end of the second connecting piping section and extending along the second discharge axis and discharging the second ion exchange resin; and a second capturing piping section connected to the end of the second discharge piping section and extending from the end of the second discharge piping section in a second capturing direction opposite to the first capturing direction, along the second piping axis and capturing the first ion exchange resin. This configuration allows for the removal of the second ion exchange resin from the aggregate of the first ion exchange resin, and the removal of the first ion exchange resin from the aggregate of the second ion exchange resin.

[0016] In the above-described transfer piping structure, the end of the first capture piping section opposite to the end connected to the first discharge piping section may be connected to the second connecting piping section, and the end of the second capture piping section opposite to the end connected to the second discharge piping section may be connected to the first connecting piping section. With this configuration, the second ion exchange resin removed from the first ion exchange resin assembly can be supplied to the second ion exchange resin assembly. Furthermore, the first ion exchange resin removed from the second ion exchange resin assembly can be supplied to the first ion exchange resin assembly.

[0017] In the above-described transfer piping structure, the mixture is formed from a first ion exchange resin, a second ion exchange resin, and a liquid, and the specific gravity of the liquid may be greater than that of the first ion exchange resin and less than that of the second ion exchange resin. With this configuration, the first ion exchange resin and the second ion exchange resin can be separated based on the difference in their specific gravities.

[0018] In the above-described transfer piping structure, the first ion exchange resin may be an anion exchange resin, and the second ion exchange resin may be a cation exchange resin. [Effects of the Invention]

[0019] According to the transfer piping structure of the present invention, it is possible to remove the ion exchange resin that has been mixed in. [Brief explanation of the drawing]

[0020] [Figure 1] Figure 1 is a perspective view of a separation facility equipped with a transfer piping structure according to the first embodiment. [Figure 2] Figure 2 is a cross-sectional view showing the first state of the separation equipment in Figure 1. [Figure 3] Figure 3 is a cross-sectional view showing the second state of the separation equipment in Figure 1. [Figure 4] Figure 4 is a cross-sectional view showing the third state in the separation equipment of Figure 1. [Figure 5]FIG. 5 is a cross-sectional view of a separation facility having a transfer pipe structure of a first modification. [Figure 6] FIG. 6 is a cross-sectional view of a separation facility having a transfer pipe structure of a second modification. [Figure 7] FIG. 7 is a cross-sectional view of a separation facility having a transfer pipe structure of a third modification. [Figure 8] FIG. 8 is a cross-sectional view of a separation facility having a transfer pipe structure of a fourth modification. [Figure 9] FIG. 9 is a cross-sectional view of a separation facility having a transfer pipe structure of a fifth modification. [Figure 10] FIG. 10 is a cross-sectional view of a separation facility having a transfer pipe structure of a sixth modification. [Figure 11] FIG. 11 is a cross-sectional view of a separation facility having a transfer pipe structure of a seventh modification.

MODE FOR CARRYING OUT THE INVENTION

[0021] Hereinafter, modes for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted.

[0022] <First Embodiment> Figure 1 shows a separation facility 100A to which the transfer piping structure 1A of the embodiment is applied. The separation facility 100A receives a mixed ion exchange resin containing anion exchange resin 9a (see Figure 2, etc., first ion exchange resin) and cation exchange resin 9c (see Figure 2, etc., second ion exchange resin) and separates it into anion exchange resin 9a and cation exchange resin 9c. The separation of anion exchange resin 9a and cation exchange resin 9c occurs due to the difference in their specific gravities. The specific gravity of anion exchange resin 9a is lower than that of cation exchange resin 9c. For example, the specific gravity of anion exchange resin 9a is between 1.00 and 1.12. As an example, the specific gravity of Cl-type anion exchange resin is between 1.06 and 1.10. Also, the specific gravity of cation exchange resin 9c is between 1.15 and 1.40. As an example, the specific gravity of Na-type cation exchange resin is between 1.22 and 1.30. Furthermore, the anion exchange resin 9a and the cation exchange resin 9c are present in a liquid. The specific gravity of this liquid is greater than that of the anion exchange resin 9a, but less than that of the cation exchange resin 9c. For example, the liquid is saturated saline solution, which has a specific gravity of 1.20. As a result, the anion exchange resin 9a floats in the liquid, while the cation exchange resin 9c settles. The function performed by the separation equipment 100A is achieved through the separation action performed by the separation column 51 and the separation action performed by the transfer piping structure 1A.

[0023] The separation equipment 100A comprises, as its main components, a separation column 51 (mixture containment section), an anion column 52, a cation column 53, and a transfer piping structure 1A. The separation column 51 is connected to the anion column 52 by a portion of the transfer piping structure 1A. As a result, the anion exchange resin 9a present in the separation column 51 can be guided to the anion column 52. Similarly, the separation column 51 is connected to the cation column 53 by another portion of the transfer piping structure 1A. As a result, the cation exchange resin 9c present in the separation column 51 can be guided to the cation column 53.

[0024] The separation tower 51 is cylindrical in shape, with its upper and lower ends closed. More specifically, the separation tower 51 has a bottom surface portion 511 and a peripheral wall portion 512. The peripheral wall portion 512 is provided with an upper opening 51a and a lower opening 51c. In the example shown in Figure 1, the anion tower 52 and the cation tower 53 are arranged on either side of the separation tower 51. Specifically, the anion tower 52 and the cation tower 53 are arranged so as to sandwich the separation tower 51. Note that the arrangement of the anion tower 52 and the cation tower 53 is not limited to the example shown in Figure 1.

[0025] The separation equipment 100A may have ancillary equipment as needed. For example, the separation equipment 100A may have an air source 54 that supplies compressed air to the separation column 51. The compressed air supplied from the air source 54 to the separation column 51 becomes the driving force that moves the anion exchange resin 9a from the separation column 51 to the anion column 52. Similarly, the compressed air supplied from the air source 54 to the separation column 51 becomes the driving force that moves the cation exchange resin 9c from the separation column 51 to the cation column 53.

[0026] The transfer piping structure 1A includes a first transfer pipe 11 and a second transfer pipe 12. The first transfer pipe 11 connects the separation tower 51 to the anion tower 52. The second transfer pipe 12 connects the separation tower 51 to the cation tower 53.

[0027] <First transfer piping> The first transfer pipe 11 is connected to the upper opening 51a of the separation tower 51. In other words, the first transfer pipe 11 is positioned above the second transfer pipe 12 in terms of its vertical axis. The first transfer pipe 11 includes a first outlet pipe section 111, a first connecting pipe section 112, a first linking pipe section 113, a first discharge pipe section 114, and a first capture pipe section 115.

[0028] Here, we define two axes that define the first transfer piping 11. These two axes are the first derivation axis A111 and the first piping axis A112. The first derivation axis A111 intersects the periphery wall portion 512 of the separation tower 51. More specifically, the first derivation axis A111 is perpendicular to the periphery wall portion 512 of the separation tower. Furthermore, the first derivation axis A111 intersects the separation tower axis A51 of the separation tower 51. Therefore, the first derivation axis A111 can also be said to be the diameter axis or radius axis of the separation tower 51. The first piping axis A112 intersects the first derivation axis A111. More specifically, the first piping axis A112 is perpendicular to the first derivation axis A111. Since the first piping axis A112 is perpendicular to the separation tower axis A51, the first piping axis A112 is parallel to the separation tower axis A51. Furthermore, if the separation tower axis A51 is parallel to the vertical direction, then the first derivation axis A111 coincides with the horizontal axis, and the first piping axis A112 coincides with the vertical axis. Furthermore, two directions are defined with respect to the first piping axis A112. These two directions are the first transport direction and the first capture direction. If the first piping axis A112 coincides with the vertical axis, then the first transport direction is vertically upward, and the first capture direction is vertically downward.

[0029] The base end of the first outlet piping section 111 is connected to the upper opening 51a of the separation column 51. The first outlet piping section 111 extends radially outward from the circumferential wall surface 512 of the separation column. The direction in which the first outlet piping section 111 extends is defined by the first outlet axis A111 that intersects the circumferential wall surface 512 of the separation column. The tip end of the first outlet piping section 111 is connected to the first connecting piping section 112 and the first capture piping section 115. The tip end of the first outlet piping section 111 can be described as having a T-shape, for example, or a branched shape. For the purposes of the following explanation, the upstream side (closer to the separation column 51) will be referred to as the "base end side" and the downstream side (closer to the anion column 52) as the "tip end side," based on the direction in which the anion exchange resin 9a moves.

[0030] The base end of the first connecting piping section 112 is connected to the tip end of the first outlet piping section 111. The direction in which the first connecting piping section 112 extends can be defined by the first piping axis A112. More specifically, the first connecting piping section 112 extends in the first transport direction (vertically upward) along the first piping axis A112. The base end of the first connecting piping section 113 is connected to the tip end of the first connecting piping section 112. The direction in which the first connecting piping section 113 extends can be defined by the first additional outlet axis A113. The first additional outlet axis A113 is parallel to the first outlet axis A111 and is spaced a predetermined distance apart in the first transport direction. The base end of the first discharge piping section 114 is connected to the tip end of the first connecting piping section 113. The direction in which the first connecting piping section 113 extends can be defined by the first piping axis A112. More specifically, the first discharge piping section 114 extends in the second transfer direction (vertically downward) along the first piping axis A112. The tip end of the first connecting piping section 113 is located in the anion tower 52.

[0031] Therefore, the anion exchange resin 9a passes through the first outlet piping section 111, the first connecting piping section 112, the first linking piping section 113, and the first discharge piping section 114 in this order, from the separation tower 51 to the anion tower 52.

[0032] The base end of the first capture piping section 115 is connected to the tip end of the first outlet piping section 111. The direction in which the first connecting piping section 112 extends may be defined by the first piping axis A112. More specifically, the first capture piping section 115 extends in a first capture direction (vertically downward direction) along the first piping axis A112. This first capture direction is opposite to the first transport direction. In this embodiment, this "opposite direction" includes, but is not limited to, an angle of 180 degrees between the first capture direction and the first transport direction, as shown in Figure 1, etc. "Opposite direction" includes cases where the components of the first capture direction and the first transport direction projected onto the vertical axis (an axis parallel to the separation tower axis A51) are opposite in direction. Examples of such a relationship between the first capture direction and the first transport direction are illustrated in the fifth and sixth modified examples described later. A removable first cap 116 is fitted to the tip of the first capture piping section 115. In other words, the tip of the first capture piping section 115 is closed and not connected to the anion tower 52.

[0033] The first capture piping section 115 captures several cation exchange resins 9c that have been separated from the aggregate of anion exchange resins 9a. Here, "capture" means preventing the cation exchange resins 9c from flowing into the anion tower 52.

[0034] Referring to Figures 2 and 3, the reason why cation exchange resin 9c is mixed with the anion exchange resin 9a will be explained. As shown in Figure 2, when a liquid containing anion exchange resin 9a and cation exchange resin 9c is introduced into the separation column 51, the anion exchange resin 9a and cation exchange resin 9c can be considered to be uniformly distributed macroscopically. When the liquid is kept still without creating any flow, the anion exchange resin 9a floats upward and the cation exchange resin 9c sinks downward according to their respective specific gravities.

[0035] Figure 3 schematically shows the state after the separation of the anion exchange resin 9a and the cation exchange resin 9c is complete. For example, the anion exchange resin 9a, which has a lower specific gravity, gathers at the top and forms an aggregate. Here, the cation exchange resin 9c may be caught in the flow of the anion exchange resin 9a moving upward. Then, in the state after the separation is complete as shown in Figure 3, when each of the anion exchange resins 9a becomes stationary, the cation exchange resin 9c that has mixed into the aggregate of anion exchange resins 9a is prevented from settling by the densely packed anion exchange resins 9a. As a result, a state is formed where the cation exchange resin 9c is mixed into the aggregate of anion exchange resins 9a.

[0036] Next, referring to Figure 4, we will explain the phenomena that occur when the anion exchange resin 9a and the mixed cation exchange resin 9c flow from the separation column 51 to the anion column 52. First, the anion exchange resin 9a and the mixed cation exchange resin 9c flow through the first outlet piping section 111. At this time, the anion exchange resin 9a, which has a lower specific gravity, accumulates on the upper side of the first outlet piping section 111 and moves toward the front end of the first outlet piping section 111 together with the liquid. On the other hand, the cation exchange resin 9c, which has a higher specific gravity, settles on the lower side of the first outlet piping section 111 and moves toward the front end of the first outlet piping section 111 together with the liquid. In other words, when the anion exchange resin 9a and the mixed cation exchange resin 9c flow through the first outlet piping section 111, the condition in which the sedimentation of the cation exchange resin 9c is hindered by the concentration of the anion exchange resin 9a is resolved, so that the cation exchange resin 9c can settle. As a result, the anion exchange resin 9a and the cation exchange resin 9c are separated due to the difference in specific gravity.

[0037] Then, when the liquid reaches the point where the first outlet piping section 111, the first connecting piping section 112, and the first capture piping section 115 are connected, the liquid, which had been flowing along the direction of the first outlet axis A111 (horizontal direction), collides with the pipe walls of the first connecting piping section 112 and the first capture piping section 115, and its velocity in the direction of the first outlet axis A111 temporarily becomes zero.

[0038] Here, the anion exchange resin 9a that has accumulated on the upper side of the first outlet piping section 111 floats towards the first connecting piping section 112, which extends vertically upward due to its specific gravity. Furthermore, the liquid, whose velocity in the direction of the first outlet axis A111 has become zero, generates a flow vertically upward as it is pushed out by the liquid flowing in from behind. As a result, the anion exchange resin 9a that is floating towards the first connecting piping section 112 moves further vertically upward by riding on the liquid flow.

[0039] In contrast, the cation exchange resin 9c that has accumulated at the bottom of the first outlet piping section 111 settles toward the first capture piping section 115, which extends vertically downward due to its specific gravity. Since the lower end of the first capture piping section 115 is closed, no liquid flow occurs in the first capture piping section 115. In other words, the liquid in the first capture piping section 115 can be considered to be at rest. As a result, the cation exchange resin 9c, which has a high specific gravity, settles vertically downward toward the bottom of the first capture piping section 115 due to its specific gravity. Therefore, the cation exchange resin 9c, which has a high specific gravity, is captured in the first capture piping section 115 and does not move to the anion tower 52.

[0040] <Second transfer piping> Refer to Figure 1 again. The second transfer pipe 12 is connected to the lower opening 51c of the separation tower 51. In other words, the second transfer pipe 12 is positioned below the first transfer pipe 11 in terms of its vertical axis. The second transfer pipe 12 includes a second outlet pipe section 121, a second connecting pipe section 122, a second linking pipe section 123, and a second capture pipe section 124.

[0041] Here, we define two axes that define the second transfer piping 12. These two axes are the second derivation axis A121 and the second piping axis A122. The second derivation axis A121 intersects the periphery wall portion 512 of the separation tower 51. More specifically, the second derivation axis A121 is perpendicular to the periphery wall portion 512 of the separation tower. Furthermore, the second derivation axis A121 intersects the separation tower axis A51 of the separation tower 51. Therefore, the second derivation axis A121 can also be said to be the diameter axis or radius axis of the separation tower 51. The second piping axis A122 intersects the second derivation axis A121. More specifically, the second piping axis A122 is perpendicular to the second derivation axis A121. Since the second piping axis A122 is perpendicular to the separation tower axis A51, the second piping axis A122 is parallel to the separation tower axis A51. Furthermore, if the separation tower axis A51 is parallel to the vertical direction, then the second derivation axis A121 coincides with the horizontal axis, and the second piping axis A122 coincides with the vertical axis. Furthermore, two directions are defined with respect to the second piping axis A122. These two directions are the second transport direction and the second capture direction. If the second piping axis A122 coincides with the vertical axis, then the second transport direction is vertically upward, and the second capture direction is vertically downward.

[0042] The base end of the second outlet piping section 121 is connected to the lower opening 51c of the separation tower 51. The second outlet piping section 121 extends radially outward from the circumferential wall surface 512 of the separation tower. The direction in which the second outlet piping section 121 extends is defined by the second piping axis A122 intersecting the circumferential wall surface 512 of the separation tower. The tip end of the second outlet piping section 121 is connected to the second connecting piping section 122 and the second capture piping section 124. The tip end of the second outlet piping section 121 can be said to have a T-shape, for example.

[0043] The base end of the second connecting piping section 122 is connected to the tip end of the second outlet piping section 121. The direction in which the second connecting piping section 122 extends can be defined by the second piping axis A122. More specifically, the second connecting piping section 122 extends along the second piping axis A122 in the second transfer direction (vertically downward). The base end of the second connecting piping section 123 is connected to the tip end of the second connecting piping section 122. The direction in which the second connecting piping section 123 extends can be defined by the second outlet axis A121. The tip end of the second connecting piping section 123 is located in the cation tower 53.

[0044] Therefore, the cation exchange resin 9c passes through the second outlet piping section 121, the second connecting piping section 122, and the second connecting piping section 123 in that order, from the separation tower 51 to the cation tower 53.

[0045] The base end of the second capture piping section 124 is connected to the tip end of the second outlet piping section 121. The direction in which the second capture piping section 124 extends may be defined by the second piping axis A122. More specifically, the second capture piping section 124 extends in the second capture direction (vertically upward) along the second piping axis A122. A removable second cap 126 is fitted to the tip end of the second capture piping section 124. In other words, the tip end of the second capture piping section 124 is closed and not connected to the cation tower 53.

[0046] The second capture piping section 124 captures some anion exchange resins 9a that have been separated from the aggregate of cation exchange resins 9c. Here, "capture" means preventing the anion exchange resins 9a from flowing into the cation tower 53.

[0047] Referring to Figures 2 and 3, the reason why anion exchange resin 9a is mixed into the aggregate of cation exchange resin 9c will be explained. The same phenomenon that occurs on the upper side of the separation column 51, where the sedimentation of cation exchange resin 9c is hindered by the densely packed anion exchange resin 9a, also occurs on the lower side of the separation column 51. In other words, anion exchange resin 9a is drawn into the flow of sedimenting cation exchange resin 9c. When each of the cation exchange resins 9c becomes stationary, the anion exchange resin 9a mixed into the aggregate of cation exchange resins 9c is prevented from rising by the densely packed cation exchange resins 9c. As a result, a state is formed where anion exchange resin 9a is mixed into the aggregate of cation exchange resins 9c.

[0048] Next, referring to Figure 4, we will explain the phenomena that occur when the cation exchange resin 9c and the mixed anion exchange resin 9a flow from the separation column 51 to the cation column 53. First, the cation exchange resin 9c and the mixed anion exchange resin 9a flow through the second outlet piping section 121. At this time, the anion exchange resin 9a, which has a lower specific gravity, accumulates on the upper side of the second outlet piping section 121 and moves toward the tip of the second outlet piping section 121 together with the liquid. On the other hand, the cation exchange resin 9c, which has a higher specific gravity, settles on the lower side of the second outlet piping section 121 and moves toward the tip of the second outlet piping section 121 together with the liquid. In other words, when the cation exchange resin 9c and the mixed anion exchange resin 9a flow through the second outlet piping section 121, the condition in which the buoyancy of the anion exchange resin 9a is hindered by the concentration of the cation exchange resin 9c is resolved, and the anion exchange resin 9a becomes able to float. As a result, the cation exchange resin 9c and the anion exchange resin 9a are separated due to the difference in specific gravity.

[0049] Then, when the liquid reaches the point where the second outlet piping section 121, the second connecting piping section 122, and the second capture piping section 124 are connected, the liquid, which had been flowing along the direction of the second outlet axis A121 (horizontal direction), collides with the pipe walls of the second connecting piping section 122 and the second capture piping section 124, and its velocity in the direction of the second outlet axis A121 temporarily becomes zero.

[0050] Here, the cation exchange resin 9c that has accumulated on the lower side of the second outlet piping section 121 settles toward the second connecting piping section 122, which extends vertically downward due to its specific gravity. Furthermore, the liquid, whose velocity toward the direction of the second outlet axis A121 has become zero, generates a flow toward vertically downward as it is pushed out by the liquid flowing in from behind. As a result, the cation exchange resin 9c settling toward the second connecting piping section 122 moves further vertically downward along with the liquid flow.

[0051] In contrast, the anion exchange resin 9a that has accumulated on the upper side of the second outlet piping section 121 floats upward towards the second capture piping section 124, which extends vertically upward due to its specific gravity. Since the upper end of the second capture piping section 124 is closed, no liquid flow occurs in the second capture piping section 124. In other words, the liquid in the second capture piping section 124 can be considered to be at rest. As a result, the anion exchange resin 9a, which has a low specific gravity, floats vertically upward towards the ceiling of the second capture piping section 124 due to its specific gravity. Therefore, the anion exchange resin 9a, which has a low specific gravity, is captured in the second capture piping section 124 and does not move to the cation tower 53.

[0052] <Effects and Effects> The transfer piping structure 1A is connected to a separation tower 51 that houses a mixture of anion exchange resin 9a and cation exchange resin 9c, and discharges the anion exchange resin 9a and cation exchange resin 9c. The transfer piping structure 1A includes a first transfer pipe 11 that discharges the anion exchange resin 9a housed in the separation tower 51. The first transfer piping 11 includes a first discharge piping section 111 connected to the separation tower 51 and extending along a first discharge axis A111 intersecting the wall of the separation tower 51; a first connecting piping section 112 connected to the end of the first discharge piping section 111 and extending from the end of the first discharge piping section 111 in a first transfer direction along a first piping axis A112 intersecting the first discharge axis A111; a first connecting piping section 113 connected to the end of the first connecting piping section 112 and extending along the first discharge axis A111 while discharging anion exchange resin 9a; and a first capture piping section 115 connected to the end of the first discharge piping section 111 and extending from the end of the first discharge piping section 111 in a first capture direction including a directional component opposite to the first transfer direction along the first piping axis A112 while capturing cation exchange resin 9c.

[0053] According to this transfer piping structure 1A, when the aggregate of anion exchange resin 9a and the cation exchange resin 9c mixed in with the aggregate move through the first discharge piping section 111, the cation exchange resin 9c is separated from the aggregate of anion exchange resin 9a based on the difference in specific gravity. The aggregate of anion exchange resin 9a is then discharged through the first connecting piping section 112 and the first linking piping section 113, and the cation exchange resin 9c captured in the first capturing piping section 115 is not discharged together with the aggregate of anion exchange resin 9a. Therefore, the cation exchange resin 9c can be reliably removed from the aggregate of anion exchange resin 9a.

[0054] In the first capture piping section 115, the end opposite to the end connected to the first discharge piping section 111 is closed. This configuration ensures that the cation exchange resin 9c can be reliably removed from the collection of anion exchange resin 9a.

[0055] The first piping axis A112 is perpendicular to the first derivation axis A111. This configuration also ensures that the cation exchange resin 9c is reliably removed from the aggregate of anion exchange resin 9a.

[0056] The transfer piping structure 1A further comprises a second transfer piping 12 for discharging the cation exchange resin 9c inside the separation tower 51. The second transfer piping 12 includes a second outlet piping section 121 connected to the separation tower 51 and extending along a second outlet axis A121 intersecting the wall surface of the separation tower 51, and a second connecting piping section 122 connected to the end of the second outlet piping section 121 and extending from the end of the second outlet piping section 121 along a second piping axis A122 intersecting the second outlet axis A121 and in a second transfer direction opposite to the first transfer direction, and a second connecting The system includes a second connecting pipe section 123 connected to the end of the piping section 122, extending along the second outlet axis A121 and discharging the cation exchange resin 9c, and a second capturing pipe section 124 connected to the end of the second outlet pipe section 121, extending from the end of the second outlet pipe section 121 along the second piping axis A122 and in a second capturing direction opposite to the first capturing direction, and capturing the anion exchange resin 9a. With this configuration, it is possible to remove the cation exchange resin 9c from the collection of anion exchange resin 9a and to remove the anion exchange resin 9a from the collection of cation exchange resin 9c.

[0057] The mixture is formed from an anion exchange resin 9a, a cation exchange resin 9c, and a liquid. The specific gravity of the liquid is greater than that of the anion exchange resin 9a and less than that of the cation exchange resin 9c. With this configuration, the anion exchange resin 9a and the cation exchange resin 9c can be separated based on the difference in their specific gravities.

[0058] <Variation> The present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0059] <First variation> Figure 5 shows a separation facility 100B to which the first modified transfer piping structure 1B is applied. In the transfer piping structure 1A of the first embodiment, the end of the first capture piping section 115 was closed by the first cap 116. In contrast, in the first modified transfer piping structure 1B, the end of the first capture piping section 115B is connected to the first connecting piping section 113.

[0060] More specifically, the first capture piping section 115B in the first transfer piping 11B includes a portion 115a extending in the first capture direction, a portion 115b extending along the first piping axis A112 which is parallel to the first derivation axis A111, and a portion 115c extending along the first transfer direction. The portion 115c extending along the first transfer direction is connected to the first connecting piping section 113.

[0061] With this piping structure, the cation exchange resin 9c, which has a high specific gravity, remains in the portion 115b that extends along the first additional capture axis A115. In order to ensure that the cation exchange resin 9c remains in the portion 115b, a filter may be provided in the portion 115b. On the other hand, the liquid that flows into the first capture piping section 115B can merge with the liquid flowing through the first connecting piping section 113 via the respective portions 115a, 115b, and 115c.

[0062] The second transfer piping 12B has a similar piping structure. That is, the second capture piping section 124B includes a portion 124a extending in the second capture direction, a portion 124b extending along the second additional capture axis A124b which is parallel to the second derivation axis A121, and a portion 124c extending along the second transfer direction. The portion 124c extending along the second transfer direction is connected to the second connecting piping section 123.

[0063] With this piping structure, the anion exchange resin 9a, which has a low specific gravity, remains in the portion 124b that extends along the second capture axis A124 in the second capture piping section 124B. A filter may be provided in this portion 124b. On the other hand, the liquid that flows into the second capture piping section 124B can merge with the liquid flowing through the second connecting piping section 123 via the respective portions 124a, 124b, and 124c.

[0064] The transfer piping structure 1B of the first modified example also allows for the removal of the cation exchange resin 9c from the aggregate of anion exchange resin 9a. Furthermore, the anion exchange resin 9a can be removed from the aggregate of cation exchange resin 9c.

[0065] <Second variation> Figure 6 shows a separation facility 100C to which the second modified transfer piping structure 1C is applied. In the transfer piping structure 1A of the first embodiment, the first output axis A111 was perpendicular to the first piping axis A112. In contrast, in the transfer piping structure 1C of the second modified example, the first output axis A111 in the first transfer piping 11 is inclined with respect to the first piping axis A112C. Specifically, the angle R11a of the first piping axis A112C with respect to the first output axis A111 is obtuse. Specifically, the angle R11a of the first piping axis A112C in the first connecting piping section 112C with respect to the first output axis A111 is obtuse. On the other hand, the angle R11b of the first piping axis A11C in the first capturing piping section 115C with respect to the first output axis A111 is acute.

[0066] According to this axial relationship, the first transport direction is directed diagonally upward. That is, the first connecting piping section 112C extends diagonally upward. On the other hand, the first capture direction is directed diagonally downward. That is, the first capture piping section 115C extends diagonally downward. This makes it possible to set the length of the first connecting piping section 112C to be relatively long. Furthermore, in the first connecting piping section 112C, the anion exchange resin 9a with a lower specific gravity can float upward, and the cation exchange resin 9c with a higher specific gravity can settle downward. The settled cation exchange resin 9c then settles along the first piping axis A112C to the first capture piping section 115C.

[0067] Similarly, the second output axis A121 in the second transfer piping 12C is inclined with respect to the second piping axis A122C. Specifically, the angle R22a of the second piping axis A122C in the second connecting piping section 122C with respect to the second output axis A121 is obtuse. On the other hand, the angle R22b of the second piping axis A122C in the second capturing piping section 124C with respect to the second output axis A121 is acute.

[0068] Due to this axial relationship, the second transport direction is directed diagonally downward. In other words, the second connecting piping section 122C extends diagonally downward. On the other hand, the second capture direction is directed diagonally upward. In other words, the second capture piping section 124C extends diagonally upward. This makes it possible to set the length of the second connecting piping section 122C to be relatively long. Furthermore, in the second connecting piping section 122C, it is possible to cause the anion exchange resin 9a, which has a lower specific gravity, to float upward, and the cation exchange resin 9c, which has a higher specific gravity, to sink downward. The floating anion exchange resin 9a floats along the second piping axis A122C to the second capture piping section 124C.

[0069] This configuration allows for an increased area for separating the cation exchange resin 9c from the aggregate of anion exchange resin 9a. As a result, the cation exchange resin 9c can be reliably removed from the aggregate of anion exchange resin 9a.

[0070] <Third variation> The separation equipment 100D shown in Figure 7 is equipped with a third modified transfer piping structure 1D. In the third modified transfer piping structure 1D, a first additional transfer pipe 15 is connected to the first transfer pipe 11. The first additional transfer pipe 15 receives the aggregate of anion exchange resin 9a discharged from the first transfer pipe 11 and discharges the aggregate of anion exchange resin 9a to the anion tower 52.

[0071] More specifically, the first additional transfer piping 15 includes a first additional connecting piping section 151, a first additional linking piping section 152, a first additional discharge piping section 153, and a first additional capture piping section 154. The first additional connecting piping section 151 is connected to the end of the first linking piping section 113 and extends from the end of the first linking piping section 113 in the first transfer direction. The first additional linking piping section 152 is connected to the end of the first additional connecting piping section 151 and extends from the first additional connecting piping section 151 along the first additional derivation axis A152 which is parallel to the first derivation axis. The first additional discharge piping section 153 is connected to the end of the first additional linking piping section 152 and extends to the anion tower 52. The first additional capture piping section 154 is connected to the tip of the first connecting piping section 113 and extends from the tip of the first connecting piping section 113 toward the first capture direction, while capturing the cation exchange resin 9c. The first additional capture piping section 154 is fitted with a first additional cap 156.

[0072] In other words, the first transfer pipe 11D of the third modified example has two structures for capturing the cation exchange resin 9c. Therefore, any cation exchange resin 9c that was not captured by the first capture structure can be captured by the second capture structure.

[0073] Similarly, in the third modified transfer piping structure 1D, a second additional transfer piping 17 is connected to the second transfer piping 12D. The second additional transfer piping 17 includes a second additional connecting piping section 171, a second additional connecting piping section 172, and a second additional capture piping section 173. The second additional connecting piping section 171 is connected to the end of the second connecting piping section 123 and extends from the tip of the second connecting piping section 123 toward the second transfer direction. The second additional connecting piping section 172 is connected to the tip of the second additional connecting piping section 171 and extends from the second additional connecting piping section 171 along an axis A172 parallel to the second derivation axis A121, and discharges the cation exchange resin 9c to the cation tower 53. The second additional capture piping section 173 is connected to the tip of the second connecting piping section 123 and extends from the tip of the second connecting piping section 123 toward the second capture direction, capturing the anion exchange resin 9a. The second additional cap 176 is attached to the second additional capture piping section 173.

[0074] In other words, the second transfer pipe 12D of the third modified example also has two structures for capturing the anion exchange resin 9a. Therefore, it becomes possible to capture any anion exchange resin 9a that was not captured by the first-stage capture structure with the second-stage capture structure.

[0075] In short, the third modified transfer piping structure 1D further comprises a first additional transfer piping 15 connected to the first transfer piping 11 and receiving the anion exchange resin 9a discharged from the first transfer piping 11. The first additional transfer piping 15 includes a first additional connecting piping section 151 connected to the end of the first connecting piping section 113 and extending from the end of the first connecting piping section 113 in the direction of a first transfer; a first additional connecting piping section 152 connected to the end of the first additional connecting piping section 151 and extending from the first additional connecting piping section 151 along a first additional output axis A152 parallel to the first output axis A111 and discharging the anion exchange resin 9a; and a first additional capturing piping section 154 connected to the end of the first connecting piping section 113 and extending from the end of the first connecting piping section 113 in the direction of a first capture and capturing the cation exchange resin 9c. This configuration allows for even more reliable removal of the cation exchange resin 9c from the aggregate of anion exchange resin 9a.

[0076] <Fourth variation> Figure 8 shows a separation facility 100E to which the fourth modified transfer piping structure 1E is applied. In the transfer piping structure 1A of the first embodiment, the end of the first capture piping section 115 was closed by a first cap 116. In contrast, in the first modified transfer piping structure 1E, the end of the first capture piping section 115E in the first transfer piping 11E is connected to the second connecting piping section 123 in the second transfer piping 12E. More specifically, the first capture piping section 115E in the first transfer piping 11E includes a portion 115a extending in the first capture direction and a portion 115b connected to the second connecting piping section 123.

[0077] With this piping structure, the cation exchange resin 9c, which has a high specific gravity, settles in the first capture piping section 115E. Since the first capture piping section 115E is connected to the second connecting piping section 123 of the second transfer piping 12, the cation exchange resin 9c flows into the second connecting piping section 123 along with the liquid flow. In other words, the cation exchange resin 9c, which was initially mixed in with the aggregate of anion exchange resin 9a, can be collected in the aggregate of cation exchange resin 9c that was formed below the separation column 51.

[0078] Similarly, in the fourth modified transfer piping structure 1E, the end of the second capture piping section 124E in the second transfer piping 12E is connected to the first connecting piping section 113 in the first transfer piping 11E. More specifically, the second capture piping section 124E in the second transfer piping 12E includes a portion 124a extending in the second capture direction and a portion 124b connected to the first connecting piping section 113.

[0079] With this piping structure, the anion exchange resin 9a, which has a low specific gravity, floats in the second capture piping section 124E. Since the second capture piping section 124E is connected to the first connecting piping section 113 of the first transfer piping 11E, the anion exchange resin 9a flows into the first connecting piping section 113 along with the liquid flow. In other words, the anion exchange resin 9a, which was initially mixed in with the aggregate of cation exchange resin 9c, can be collected in the aggregate of anion exchange resin 9a that was formed above the separation column 51.

[0080] In short, in the first capture piping section 115E, the end opposite to the end connected to the first outlet piping section 111 is connected to the second connecting piping section 123. In the second capture piping section 124E, the end opposite to the end connected to the second outlet piping section 121 is connected to the first connecting piping section 113. With this configuration, the cation exchange resin 9c removed from the collection of anion exchange resin 9a can be given to the collection of cation exchange resin 9c. Furthermore, the anion exchange resin 9a removed from the collection of cation exchange resin 9c can be given to the collection of anion exchange resin 9a.

[0081] <Fifth variation> Figure 9 shows a separation facility 100F to which the fifth modified transfer piping structure 1F is applied. In the transfer piping structure 1A of the first embodiment, the first connecting piping section 112 and the first capturing piping section 115 each extend along the first piping axis A112, and their respective directions of extension are opposite. As shown in the enlarged section Z9 of the fifth modified example, when the direction D112F in which the first connecting piping section 112F extends is projected onto the vertical axis AV, the first connecting direction component H112F can be defined. Furthermore, when the direction D115F in which the first capturing piping section 115F extends is projected onto the vertical axis AV, the first capturing direction component H115F can be defined. The direction of the first capturing direction component H115F is opposite to the direction of the first connecting direction component H112F. In other words, the first capture direction component H115F is the "direction component opposite to the first transport direction along the first piping axis" in this case.

[0082] As shown in Figure 9, the first transfer pipe 11F of the fifth modified transfer piping structure 1F has a first connecting pipe section 112F and a first capture pipe section 115F. The first connecting pipe section 112F extends along the first pipe axis A112F. The first capture pipe section 115F extends along the first capture axis A115F. The first pipe axis A112F intersects the first derivation axis A111 at a predetermined angle R11a. The first capture axis A115F intersects the first derivation axis A111 at a predetermined angle R11b. The absolute value of this angle R11a may be the same as or different from the absolute value of angle R11b. Both angles R11a and R11b are less than 90 degrees. In other words, both angles R11a and R11b are acute angles. On the other hand, the angle R11a of the first piping axis A112F is defined to rotate clockwise (CW) with respect to the first derivation axis A111, while the angle R11b of the first capture axis A115F is defined to rotate counterclockwise (CCW) with respect to the first derivation axis A111.

[0083] The first transfer pipe 12F of the transfer piping structure 1F, which is the fifth modified example, has a second connecting pipe section 122F and a second capture pipe section 124F. The second connecting pipe section 122F extends along the second pipe axis A122F. The second capture pipe section 124F extends along the second capture axis A124F. The second pipe axis A122F intersects the second discharge axis A123 at a predetermined angle R12a. The second capture axis A124F intersects the second discharge axis A123 at a predetermined angle R12b. The angle R12a of the second pipe axis A122 is defined to rotate counterclockwise (CCW) with respect to the second discharge axis A123. The angle R12b of the second capture axis A124F is defined to rotate clockwise (CW) with respect to the second discharge axis A123.

[0084] <Sixth variation> Figure 10 shows a separation facility 100G to which the sixth modified transfer piping structure 1G is applied. As shown in Figure 10, the first transfer piping 11G of the sixth modified transfer piping structure 1G has a first connecting piping section 112G and a first capture piping section 115G. The first connecting piping section 112G extends along the first piping axis A112G. The first capture piping section 115G extends along the first capture axis A115G. The first piping axis A112G intersects the first derivation axis A111 at a predetermined angle R11a. The first capture axis A115G intersects the first derivation axis A111 at a predetermined angle R11b. The absolute value of this angle R11a may be the same as or different from the absolute value of angle R11b. Both angles R11a and R11b are greater than 90 degrees. In other words, both angles R11a and R11b are obtuse angles. On the other hand, angle R11a of the first piping axis A112G is defined to rotate clockwise (CW) with respect to the first derivation axis A111, while angle R11b of the first capture axis A115G is defined to rotate counterclockwise (CCW) with respect to the first derivation axis A111.

[0085] The second transfer pipe 12G of the sixth modified transfer piping structure 1G has a second connecting pipe section 122G and a second capture pipe section 124G. The second connecting pipe section 122G extends along the second pipe axis A122G. The second capture pipe section 124G extends along the second capture axis A124G. The second pipe axis A122G intersects the second discharge axis A123 at a predetermined angle R12a. The second capture axis A124G intersects the second discharge axis A123 at a predetermined angle R12b. Both angles R12a and R12b are greater than 90 degrees. In other words, both angles R12a and R12b are obtuse angles. The angle R12a of the second pipe axis A122G is defined to rotate counterclockwise (CCW) with respect to the second discharge axis A123. The angle R12b of the second capture axis A124G is defined to rotate clockwise (CW) with respect to the second discharge axis A123.

[0086] <7th variation> Figure 11 shows a separation facility 100H to which the seventh modified transfer piping structure 1H is applied. In the transfer piping structure 1A of the first embodiment, the first derivation axis A111 was perpendicular to the first piping axis A112. In contrast, in the transfer piping structure 1H of the seventh modified example, the first piping axis A112H is inclined with respect to the first derivation axis A111 in the first transfer piping 11H. Specifically, the angle R11a between the portion of the first piping axis A112H that defines the first connecting piping section 112H and the first derivation axis A111 is acute. On the other hand, the angle R11b between the portion of the first piping axis A112H that defines the first capture piping section 115H and the first derivation axis A111 is obtuse.

[0087] Similarly, the second piping axis A122H is inclined with respect to the second discharge axis A123 in the second transfer piping 12H. Specifically, the angle R12a between the portion of the second piping axis A122H that defines the second connecting piping section 122H and the second discharge axis A123 is acute. On the other hand, the angle R11b between the portion of the second piping axis A122H that defines the second capture piping section 124H and the second discharge axis A123 is obtuse.

[0088] <Other variations> In the first embodiment, the transfer piping structure 1A connected the separation column 51 to the anion column 52 and the cation column 53. For example, the leading end of the transfer piping structure 1A does not have to be connected to the anion column 52 and the cation column 53. [Explanation of Symbols]

[0089] 1A, 1B, 1C, 1D, 1E...Transfer piping structure, 100A, 100B, 100C, 100D, 100E...Separation equipment, 9a...Anion exchange resin (first ion exchange resin), 9c...Cation exchange resin (second ion exchange resin), 11...First transfer piping, 12...Second transfer piping, 15...First additional transfer piping, 51...Separation tower (mixture containment section), 111...First discharge piping section, 112...First connection piping section, 113 ...First connecting piping section, 115...First capture piping section, 121...Second outlet piping section, 122...Second connecting piping section, 123...Second connecting piping section, 124...Second capture piping section, 151...First additional connecting piping section, 152...First additional connecting piping section, 153...First additional discharge piping section, A111...First outlet axis, A112...First piping axis, A113...First additional outlet axis, A121...Second outlet axis, A122...Second piping axis.

Claims

1. A transfer piping structure connected to a mixture storage section containing a mixture of a first ion exchange resin and a second ion exchange resin, for discharging the first ion exchange resin and / or the second ion exchange resin, The mixture containment section is equipped with a first transfer pipe for discharging the first ion exchange resin, The first transfer piping is, A first outlet piping section is connected to the mixture storage section and extends along a first outlet axis that intersects the wall surface of the mixture storage section, A first connecting pipe section is connected to the end of the first outlet pipe section and extends from the end of the first outlet pipe section toward a first transport direction along a first pipe axis that intersects the first outlet axis, A first connecting piping section is connected to the end of the first connecting piping section, extends along the first discharge axis, and discharges the first ion exchange resin, A transfer piping structure comprising: a first capture piping section connected to the end of the first outlet piping section, extending from the end of the first outlet piping section toward a first capture direction, and capturing the second ion exchange resin.

2. The transfer piping structure according to claim 1, wherein the end of the first capture piping section opposite to the end connected to the first discharge piping section is closed.

3. The transfer piping structure according to claim 2, wherein the first piping axis is perpendicular to the first derivation axis.

4. The transfer piping structure according to claim 2, wherein the angle between the first derivation axis and the first piping axis is an obtuse angle.

5. The transfer piping structure according to claim 2, wherein the angle between the first derivation axis and the first piping axis is acute.

6. The system further comprises a first additional transfer pipe connected to the first transfer pipe and receiving the first ion exchange resin discharged from the first transfer pipe, The first additional transfer piping is, A first additional connecting pipe section is connected to the end of the first connecting pipe section and extends from the end of the first connecting pipe section toward the first transport direction, A first additional connecting pipe section is connected to the end of the first additional connecting pipe section, extends from the first additional connecting pipe section along a first additional outlet axis parallel to the first outlet axis, and discharges the first ion exchange resin, The transfer piping structure according to claim 2, comprising: a first additional capture piping section connected to the end of the first connecting piping section, extending from the end of the first additional connecting piping section toward the first capture direction, and capturing the second ion exchange resin.

7. The transfer piping structure according to claim 1, wherein the end of the first capture piping section opposite to the end connected to the first discharge piping section is connected to the first connecting piping section.

8. The mixture storage section is further provided with a second transfer pipe for discharging the second ion exchange resin, The aforementioned second transfer pipe is A second outlet piping section is connected to the mixture storage section and extends along a second outlet axis that intersects the wall surface of the mixture storage section, A second connecting pipe section is connected to the end of the second outlet pipe section and extends from the end of the second outlet pipe section along a second pipe axis that intersects the second outlet axis and in a second transport direction opposite to the first transport direction, A second connecting piping section is connected to the end of the second connecting piping section, extends along the second discharge axis, and discharges the second ion exchange resin, The transfer piping structure according to claim 1, comprising: a second capture piping section connected to the end of the second outlet piping section, extending from the end of the second outlet piping section along the axis of the second piping and in a second capture direction opposite to the first capture direction, and capturing the first ion exchange resin.

9. In the first capture piping section, the end opposite to the end connected to the first outlet piping section is connected to the second connecting piping section. The transfer piping structure according to claim 8, wherein the end of the second capture piping section opposite to the end connected to the second outlet piping section is connected to the first connecting piping section.

10. The mixture is formed by the first ion exchange resin, the second ion exchange resin, and the liquid. The transfer piping structure according to any one of claims 1 to 9, wherein the specific gravity of the liquid is greater than the specific gravity of the first ion exchange resin and less than the specific gravity of the second ion exchange resin.

11. The first ion exchange resin is an anion exchange resin, The transfer piping structure according to any one of claims 1 to 9, wherein the second ion exchange resin is a cation exchange resin.

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