Fluid contact apparatus and liquid treatment apparatus

Abstract

To efficiently bring two fluids having different specific gravities into contact.SOLUTION: The fluid contact apparatus comprises: a contact tube having an inlet through which liquid is introduced and an outlet which is located below the inlet and through which the liquid is discharged; and a supply mechanism that supplies a contact fluid having a lower specific gravity than the liquid into the interior of the contact tube from a position below an upper liquid level, which is the upper limit of the liquid level in the contact tube.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a fluid contact device and a liquid treatment device.

Background Art

[0002] Patent Document 1 describes a configuration in which ozone generated by an ozone generator is injected and mixed into a fluid to be treated by a hydro ejector, and the mixture is introduced into a static mixer and an ozone dissolution reactor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique described in Patent Document 1, a fluid and a gas are mixed by a hydro ejector and further mixed by an ozone dissolution reactor or the like.

[0005] However, even when using the technique described in Patent Document 1, there is room for improvement in efficiently bringing two types of fluids into contact.

[0006] An object of the present disclosure is to efficiently bring two types of fluids having different specific gravities into contact.

Means for Solving the Problems

[0007] The fluid contact device of the present disclosure includes a contact pipe having an inlet through which a liquid is introduced and an outlet located below the inlet for discharging the liquid, and a supply mechanism for supplying a contact fluid having a specific gravity smaller than that of the liquid into the contact pipe from a position below the upper limit liquid level which is the upper limit of the liquid level in the contact pipe.

Effects of the Invention

[0008] In the technology of the present disclosure, two fluids with different specific gravities can be efficiently brought into contact with each other.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0010] Hereinafter, a first embodiment will be described with reference to the drawings.

[0011] FIG. 1 shows a fluid contact device 12 according to the technology of the present disclosure and a liquid treatment device 10 having this fluid contact device 12. FIG. 2 shows the fluid contact device 12 and the liquid treatment device 10 together with pre-treatment water TW1, in-process water TW2, and treated water TW3.

[0012] In the present embodiment, the fluid contact device 12 is a device that brings a contact fluid into contact with pre-treatment water TW1, which is an example of the object to be treated. In the liquid treatment device 10, the contact fluid is brought into contact with the pre-treatment water TW1. The water being treated by the liquid treatment device 10 is the in-process water TW2. And as a result of being treated by the liquid treatment device 10, treated water TW3 is obtained.

[0013] The contact fluid may be a fluid of a type different from the liquid to be treated and having a specific gravity smaller than that of the liquid to be treated, and may be either a liquid or a gas. The fluid contact device 12 of the present embodiment is applied to, for example, a water purification system (not shown), and is a device for bringing ozone, which is an example of the contact fluid, into contact with raw water TW1 to be treated.

[0014] The liquid treatment device 10 has a tank body 14. The tank body 14 is, for example, a container with an openable upper surface. Inside the tank body 14, it is possible to store treated water TW3 that has undergone a predetermined treatment by the fluid contact device 12. The upper surface of the tank body 14 is configured to be closed by a lid member 56.

[0015] The tank body 14 is provided with a liquid level maintaining device (not shown). The liquid level maintaining device is configured to appropriately discharge the treated water TW3 to the outside so that the liquid level of the treated water TW3 inside the tank body 14 does not exceed a predetermined set liquid level LL. In the present embodiment, the set liquid level LL of the tank body 14 is located below the opening portion 30 of the discharge pipe 20 described later.

[0016] The fluid contact device 12 of the first embodiment has a contact pipe 18, a discharge pipe 20, and a supply mechanism 22. The raw liquid is supplied as raw water TW1 to the contact pipe 18 from a liquid storage portion 42 to be described later. The raw water TW1 is water before being brought into contact with ozone bubbles GB in the fluid contact device 12 and undergoing a predetermined treatment. Then, inside the contact pipe 18 and the discharge pipe 20, it moves as intermediate treated water TW2 and reaches the opening portion 30.

[0017] The contact pipe 18 is a pipe having a substantially cylindrical shape in the illustrated example, and functions as a container capable of accommodating the intermediate treated water TW2 inside. The volume of the contact pipe 18 is smaller compared to the volume of the tank body 14.

[0018] The contact pipe 18 is fixed to the tank body 14 or the lid member 56. In this state, the lower end 18B of the contact pipe 18 contacts the bottom plate 26 of the tank body 14 or is separated therefrom with a predetermined interval.

[0019] The upper surface of the contact pipe 18 is an open inlet 18H. The inlet 18H is located above the opening 30 described later.

[0020] A discharge port 28 is provided at the lower part of the contact pipe 18. In the present embodiment, the discharge port 28 is formed on the side surface of the contact pipe 18 and at a position close to the lower end 18B. In the first embodiment, the "lower part" of the contact pipe 18 is, for example, a position below the opening 30, preferably a position below half of the height H inside the contact pipe 18.

[0021] A discharge pipe 20 communicating with the discharge port 28 is provided at the lower part of the contact pipe 18. The discharge pipe 20 extends outward from the outer peripheral surface of the contact pipe 18. The discharge pipe 20 extends upward. The tip (upper end) of the discharge pipe 20 is the opening 30. At the opening 30, the discharge pipe 20 is open inside the tank body 14. At the opening 30, the processing intermediate water TW2 in the contact pipe 18 is discharged through the discharge pipe 20.

[0022] A holding plate 32 extending outward from the contact pipe 18 is attached to the upper part of the contact pipe 18. The tip portion of the discharge pipe 20 is held by the holding plate 32 inside the tank body 14. In the illustrated example, the opening 30 is located lower than the inlet 40 of the inflow pipe 38 described later and higher than the set liquid level LL of the tank body 14.

[0023] In the first embodiment, the contact pipe 18 and the discharge pipe 20 communicate with each other at the discharge port 28 at their respective lower parts, forming a U-shaped pipe 16 as a whole. Since the contact pipe 18 and the discharge pipe 20 communicate with each other at the lower part and the upper ends of the respective pipes are open, the liquid levels of the contact pipe 18 and the discharge pipe 20 are maintained in a consistent state. Since the treated water TW2 during the rising process of the discharge pipe 20 flows out from the open part 30 (see arrow F4 in Fig. 2), the liquid level of the contact pipe 18 does not become higher than the height position of the open part 30. That is, an upper limit liquid level SL, which is the same height position as the open part 30, is set as the upper limit of the liquid level of the treated water TW2 in the contact pipe 18. Note that the open part 30 may be located at a position lower than the set liquid level LL of the tank body 14, but it is more preferable that the open part 30 is located at a position higher than the set liquid level LL because the liquid level can be made higher than the set liquid level LL. That is, by holding the treated water TW2 inside the contact pipe 18 to a position higher than the set liquid level LL, a longer contact time with ozone can be ensured. When the open part 30 is located at a position lower than the set liquid level LL of the tank body 14, the upper limit liquid level SL becomes the same height position as the set liquid level LL.

[0024] The average cross-sectional area of the flow path of the discharge port 28 and the discharge pipe 20 (hereinafter, the average cross-sectional area of the flow path is simply referred to as the "average cross-sectional area") may be larger than the average cross-sectional area of the contact pipe 18, but in this embodiment, the average cross-sectional area of the discharge port 28 and the discharge pipe 20 is equal to or less than the average cross-sectional area of the contact pipe 18. This "average cross-sectional area" is a numerical value obtained by dividing the integral value of the cross-sectional area of the flow path in the direction orthogonal to the longitudinal direction by the length in the pipe under consideration. For example, in this embodiment, as will be described later, the contact pipe 18 has a bellows 46 and the discharge pipe 20 has a bellows 48, respectively. In this case, the average cross-sectional area can be approximated by the intermediate value between the maximum value and the minimum value of the cross-sectional area of the flow path.

[0025] The supply mechanism 22 has a supply pipe 54 and a bubble generating member 36. The supply pipe 54 is disposed inside the contact pipe 18. The upper end of the supply pipe 54 extends outside the tank body 14 through the inlet 18H and is connected to the gas generator 34. The gas generator 34 is a device that generates ozone in this embodiment. That is, by bringing ozone into contact with the water TW2 during treatment, a predetermined treatment can be performed on the water TW2 during treatment.

[0026] A bubble generating member 36 is attached to the lower end of the supply pipe 54. The bubble generating member 36 discharges the inflowing gas to the outside as fine gas. The bubble generating member 36 may be referred to as an air stone. In the illustrated example, the bubble generating member 36 is located below the discharge port 28 inside the contact pipe 18, but may be at the same height as the discharge port 28 or higher than the discharge port 28. However, the bubble generating member 36 is installed so as to be at a height position lower than the opening 30 of the discharge pipe 28. The ozone generated by the gas generator 34 is discharged from the bubble generating member 36 into the contact pipe 18.

[0027] The supply pipe 54 is held with respect to the contact pipe 18 by a holder (not shown) so that the bubble generating member 36 is at a predetermined height position. Since the discharge port 28 is located below the opening 30 of the discharge pipe 20, the bubble generating member 36 is also located below the opening 30. As a result, a structure is realized in which the bubble generating member 36 supplies ozone, which is a contact fluid, into the contact pipe 18 from a position below the upper limit liquid level SL.

[0028] The tip portion of the inflow pipe 38 is disposed inside the contact pipe 18. The inflow pipe 38 extends outside the tank body 14 through the inlet 18H of the contact pipe 18 and is connected to the liquid storage unit 42 in the water purification system. The liquid storage unit 42 performs a predetermined treatment such as purification on the pre-treatment water TW1 in the previous stage, which is treated by the liquid treatment device 10, for example, a treatment different from the treatment performed by the liquid treatment device 10.

[0029] The lower end of the inflow pipe 38 is the inlet 40. The inlet 40 is located inside the contact pipe 18, lower than the upper end of the contact pipe 18 and higher than the opening 30 of the discharge pipe 20. The inflow pipe 38 is held by a fixture (not shown) such that the inlet 40 is at such a height position. Alternatively, a through-hole may be formed in the peripheral wall of the contact pipe 18, and the inflow pipe 38 may be inserted through this through-hole so that the inflow pipe 38 is held.

[0030] Since the inflow pipe 38 passes through the inlet 18H of the contact pipe 18, the inlet 18H acts as an inlet when the untreated water TW1 is introduced into the contact pipe 18. For example, even if the inlet 40 is above the inlet 18H, the untreated water TW1 flowing out from the inlet 40 passes through the inlet 18H.

[0031] In the contact pipe 18, the middle portion in the height direction (longitudinal direction) has a bellows 46. The contact pipe 18 is bendable at the bellows 46. Also, in the discharge pipe 20, the middle portion in the height direction (longitudinal direction) has a bellows 48. The discharge pipe 20 is bendable and deformable at the bellows 48. Both the bellows 46 and the bellows 48 are examples of the bent portion 44.

[0032] In the supply pipe 54, at least a part located inside the contact pipe 18 is a flexible part 50. The flexible part 50 is an example of a bending part 44 capable of bending and deforming the supply pipe 54. When the contact pipe 18 is bent and deformed by the bellows 46, the supply pipe 54 can also be bent and deformed following the contact pipe 18 by the flexible part 50. The bending part 44 of the supply pipe 54 may be constituted by a bellows like the contact pipe 18 and the discharge pipe 20, or the supply pipe 54 itself may be formed of a flexible material, for example, a flexible resin material or rubber, etc., so that the flexible part 50 as the bending part 44 may be constituted. Further, the bending parts 44 of the contact pipe 18 and the discharge pipe 20 may be formed of a flexible material, that is, the above-mentioned flexible resin material, rubber, etc. instead of the bellows 46, 48. In short, when providing the bending part 44 in the contact pipe 18, the discharge pipe 20, and the supply pipe 54, it may be a configuration forming a bellows as a shape, or a configuration using a flexible material as a material, or these may be used in combination.

[0033] A weight member 52 is provided below the contact pipe 18. The contact pipe 18 is located inside the tank body 14 with the weight member 52 downward, and the posture of the contact pipe 18 is stabilized.

[0034] Next, the operation of this embodiment will be described.

[0035] In the fluid contact device 12 and the liquid treatment device 10 of this embodiment, the pre-treatment water TW1 flows into the inside of the contact pipe 18 from the liquid storage part 42 to be treated outside the tank body 14 through the inflow pipe 38. The pre-treatment water TW1 flowing out from the inlet 40 of the inflow pipe 38 flows through the inside of the contact pipe 18 as the in-process water TW2 as shown by the arrow F1 in FIG. 2, and accumulates inside the contact pipe 18 from the lower side.

[0036] The contact pipe 18 is provided with a discharge port 28. A discharge pipe 20 extends from the discharge port 28, and the tip of the discharge pipe 20 is an open portion 30. Therefore, the water TW2 in the process inside the contact pipe 18 also flows into the discharge pipe 20 (see arrow F3). The liquid level inside the discharge pipe 20 rises while maintaining the same height position as the liquid level inside the contact pipe 18. After the liquid level inside the discharge pipe 20 reaches the open portion 30, even if the water TW2 in the process flows into the inside of the contact pipe 18 from the inflow pipe 38, the liquid level does not rise, and the treated water TW3 flows out into the inside of the tank body 14 from the open portion 30 of the discharge pipe 20 (see arrow F4).

[0037] In this way, in the state where the water TW2 in the process accumulates inside the contact pipe 18 and the liquid level of the water TW2 in the process reaches the same height as the open portion 30, it is possible to supply the ozone generated by the gas generator 34 outside the tank body 14 into the inside of the contact pipe 18 through the supply pipe 54.

[0038] In the present embodiment, the bubble generating member 36 forms an example of the supply mechanism 22. And the bubble generating member 36 is located at a position below the upper limit liquid level SL inside the contact pipe 18. Therefore, a state is realized in which the ozone supplied into the contact pipe 18 becomes bubbles GB and rises inside the water TW2 in the process while contacting the water TW2 in the process. In particular, inside the contact pipe 18, a downward flow of the water TW2 in the process (see arrow F1) and a flow of the ozone bubbles GB rising in the opposite direction (upward) are generated. In this way, since the water TW2 in the process and the ozone bubbles GB flow in different directions from each other, the contact state of the ozone bubbles GB with respect to the water TW2 in the process can be maintained well, and the water TW2 in the process and the ozone bubbles GB can be efficiently contacted.

[0039] Also, in the present embodiment, in order to ensure a long contact time between the water being treated TW2 and the ozone bubbles GB inside the contact pipe 18, members such as a partition plate (sometimes referred to as a baffle plate or a flow-blocking plate) that suppresses the upward movement of the ozone bubbles GB in the contact pipe 18 and temporarily holds them are unnecessary. Therefore, it is possible to simplify the structure of both the inside of the contact pipe 18 and the entire fluid contact device 12.

[0040] Moreover, in the present embodiment, the volume of the contact pipe 18 is smaller compared to the volume of the tank body 14. Here, assume a case where ozone bubbles GB are introduced and brought into contact with the treated water stored inside the tank body 14 as the water being treated TW2. In this case, since the ozone bubbles GB diffuse inside the tank body 14, the contact area of the ozone bubbles GB with respect to the water being treated TW2 per unit volume becomes narrow, and the contact opportunity decreases. In contrast, in the present embodiment, since the ozone bubbles GB are brought into contact with the water being treated TW2 inside the contact pipe 18 having a smaller volume than the tank body 14, the contact area of the ozone bubbles GB with respect to the water being treated TW2 per unit volume becomes wide. Also by this, it is possible to maintain a good contact state of ozone with respect to the water being treated TW2 and efficiently bring the water being treated TW2 into contact with ozone.

[0041] In the present embodiment, the discharge port 28 is located at a position below the upper limit liquid level SL. Therefore, inside the contact pipe 18, it is possible to generate a flow of the water being treated TW2 that flows downward from the position of the upper limit liquid level SL to the discharge port 28.

[0042] In the present embodiment, it has a discharge pipe 20. An opening 30 that is opened at a position below the inlet 18H is formed in the discharge pipe 20. The position of this opening 30 is also the position of the upper limit liquid level SL. That is, the position of the upper limit liquid level SL can be arbitrarily set by the position of the opening 30.

[0043] In this embodiment, the average cross-sectional areas of the discharge port 28 and the discharge pipe 20 are equal to or less than the average cross-sectional area of the contact pipe 18. As a result, compared with the case where the average cross-sectional areas of the discharge port 28 and the discharge pipe 20 are larger than the average cross-sectional area of the contact pipe 18, the discharge port 28 and the discharge pipe 20 are narrower, and it is difficult for the ozone bubbles GB to enter the inside of the contact pipe 20. Thereby, a state in which the ozone bubbles GB are present in the water TW2 being treated in the contact pipe 18 is realized, and the ozone bubbles GB can be effectively brought into contact with the water TW2 being treated.

[0044] In this embodiment, as the liquid treatment apparatus 10, the contact pipe 18 is disposed inside the tank main body 14. The ozone bubbles GB that have risen to the liquid level of the water TW2 being treated inside the contact pipe 18 can be discharged inside the tank main body 14.

[0045] Furthermore, in this embodiment, the opening portion 30 of the discharge pipe 20 is also disposed inside the tank main body 14. Therefore, the treated water TW3 flowing out from the opening portion 30 of the discharge pipe 20 is stored inside the tank main body 14. The treated water TW3 stored in the tank main body 14 is sent outside the tank main body 14 as necessary.

[0046] In this embodiment, a weight member 52 is provided at the lower portion of the contact pipe 18. Therefore, in the water TW2 being treated inside the tank main body 14, the contact pipe 18 is likely to maintain a posture in which the weight member 52 is downward and the longitudinal direction of the contact pipe 18 coincides with the vertical direction. By having a posture in which the longitudinal direction of the contact pipe 18 coincides with the vertical direction, a configuration can be realized in which the flow of the water TW2 being treated (see arrow F1) from the inlet 40 to the discharge port 28 and the movement of the ozone bubbles GB in the opposite direction (see arrow F2) are likely to occur along the longitudinal direction of the contact pipe 18.

[0047] In the present embodiment, in the illustrated example, the inlet 40 of the inflow pipe 38 is located above the opening 30 of the discharge pipe 20. The opening 30 of the discharge pipe 20 is the upper limit liquid level SL which is the upper limit of the liquid level in the contact pipe 18. That is, even when the liquid level is highest inside the contact pipe 18, the inlet 40 of the inflow pipe 38 will not be blocked by the water being treated TW2, and the untreated water TW1 can smoothly flow into the inside of the contact pipe 18.

[0048] In the present embodiment, the bubble generating member 36 of the supply pipe 54 is located below the discharge port 28 of the discharge pipe 20. Compared with a configuration where the bubble generating member 36 of the supply pipe 54 is located above the discharge port 28 of the discharge pipe 20, the ozone bubbles GB can be brought into contact with the water being treated TW2 located below the discharge port 28. Also, a longer length (spatial length) for the ozone bubbles GB to rise inside the water being treated TW2 can be ensured.

[0049] In the present embodiment, the contact pipe 18, the discharge pipe 20, and the supply pipe 54 have bending portions 44. By bending the contact pipe 18, the discharge pipe 20, and the supply pipe 54 using the bending portions 44, the work of assembling them at a predetermined position of the tank body 14 can be facilitated. For example, when the space above the tank body 14 is narrow due to other members being arranged on the tank body 14, etc., by bending the contact pipe 18, the discharge pipe 20, and the supply pipe 54, it becomes possible to insert them into such a narrow space.

[0050] In particular, in the contact pipe 18 and the discharge pipe 20, the bending portions 44 are bellows 46, 48. That is, with a simple structure of providing the bellows 46, 48, the contact pipe 18 and the discharge pipe 20 can be made into a structure that can be bent and deformed. Note that bellows similar to the bellows 46, 48 may be applied as the bending portion 44 of the supply pipe 54. In this case, the supply pipe 54 can also be made into a structure that can be bent and deformed with a simple structure of providing bellows.

[0051] In this embodiment, the supply pipe 54 is disposed inside the contact pipe 18. In a configuration where the supply pipe 54 is disposed outside the contact pipe 18, it is necessary to penetrate the supply pipe 54 from the outside to the inside of the contact pipe 18 so that the bubble generating member 36 is located inside the contact pipe 18. However, in this embodiment, such necessity does not exist, and it is possible to simplify the structure.

[0052] Next, a second embodiment will be described. In each of the following embodiments, the same elements, members, etc. as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof are omitted.

[0053] As shown in FIG. 3, in the fluid contact device 62 and the liquid treatment device 60 of the second embodiment, a curved portion 64 is formed in the discharge pipe 20. The discharge pipe 20 in the second embodiment has a larger resistance when the water TW2 during treatment flows compared to the discharge pipe 20 in the first embodiment due to the formation of the curved portion 64.

[0054] Therefore, in the fluid contact device 62 and the liquid treatment device 60 of the second embodiment, compared to the fluid contact device 12 of the first embodiment, when the water TW2 during treatment flows from the contact pipe 18 into the discharge pipe 20, the structure is such that the ozone bubbles GB (see FIG. 2) are less likely to flow in together with the water TW2 during treatment. That is, the ozone bubbles GB can be surely brought into contact with the water TW2 during treatment inside the contact pipe 18.

[0055] Next, a third embodiment will be described.

[0056] As shown in FIG. 4, in the fluid contact device 72 and the liquid treatment device 70 of the third embodiment, the discharge pipe 20 (see FIG. 1) of the first embodiment is not provided. And a discharge port 28 is formed at the lower end 18B of the contact pipe 18. In the illustrated example, the position 18B of the discharge port 28 is at the center of the lower end of the contact pipe 18. The weight member 52 is formed in an annular shape so as to surround the discharge port 28. The cross-sectional area of the discharge port 28 is smaller than the cross-sectional area of the contact pipe 18. The cross-sectional area of the contact pipe 18 in this case is, for example, the average cross-sectional area described above.

[0057] In the fluid contact device 72 and the liquid treatment device 70 of the third embodiment, since the lower end of the contact pipe 18 is thus opened as the discharge port 28, the liquid level inside the contact pipe 18 coincides with the liquid level of the tank body 14. That is, the upper limit liquid level SL in the contact pipe 18 is at the same height position as the set liquid level LL of the tank body 14. The set liquid level LL of the tank body 14 is set at a predetermined position, and the fluid contact device 72 is held at a predetermined height position inside the tank body 14. Thereby, the upper limit liquid level SL inside the contact pipe 18 is determined at a fixed height position.

[0058] And also in the fluid contact device 72 and the liquid treatment device 70 of the third embodiment, the bubble generation member 36 is located at a position below the upper limit liquid level SL. That is, the supply mechanism 22 is structured to supply the ozone bubbles GB into the contact pipe 18 from a position below the upper limit liquid level SL.

[0059] In the fluid contact device 72 of the third embodiment, since the discharge pipe 20 is not provided, the structure can be simplified.

[0060] On the other hand, the fluid contact device 12 of the first embodiment and the fluid contact device 62 of the second embodiment have the discharge pipe 20, and the tip of the discharge pipe 20 is opened as the opening portion 30 inside the tank body 14. Thereby, the upper limit liquid level SL of the contact pipe 18 can be set as the height position of the opening portion 30. By determining the shape of the discharge pipe 20 so that the opening portion 30 is at a desired height position, the height position of the upper limit liquid level SL can be set at a desired position.

[0061] Note that in the third embodiment, the "lower part" of the contact pipe 18 is, for example, a position below half of the height H of the inner dimension of the contact pipe 18.

[0062] Next, the fourth embodiment will be described.

[0063] As shown in FIG. 5, in the fluid contact device 82 and the liquid treatment device 80 of the fourth embodiment, the weight member 52 (see FIG. 1 etc.) is not provided. Further, the discharge port 28 is provided at a position close to the lower end 18B of the contact pipe 18 (substantially at the same height position as the lower end 18B of the contact pipe 18).

[0064] It can also be said that the fluid contact device 82 and the liquid treatment device 80 of the fourth embodiment are examples in which the weight member 52 is omitted from the fluid contact device 12 of the first embodiment and the position of the lower end 18B of the contact pipe 18 is raised to the position of the discharge port 28. And the height position of the bubble generating member 36 is the same height position as the discharge port 28.

[0065] In the fluid contact device 82 and the liquid treatment device 80 of the fourth embodiment, since the weight member 52 is not provided in this way, the structure of the contact pipe 18 can be simplified, and the weight of the fluid contact device 80 can be reduced.

[0066] Furthermore, the following appendices are disclosed. (Appendix 1) A contact pipe including an inlet through which a liquid is introduced and a discharge port located below the inlet for discharging the liquid, a supply mechanism for supplying a contact fluid having a specific gravity smaller than that of the liquid into the contact pipe from a position below the upper limit liquid level which is the upper limit of the liquid level in the contact pipe, and a fluid contact device having the same. (Appendix 2) The fluid contact device according to Appendix 1, wherein the discharge port is located below the upper limit liquid level. (Appendix 3) The fluid contact device according to Appendix 1 or Appendix 2, further comprising a discharge pipe that communicates with the discharge port and extends outside the contact pipe, and has an opening portion that is opened at a position below the inlet. (Appendix 4) The fluid contact device according to Appendix 3, wherein at least the contact pipe has a bendable bent portion. (Appendix 5) The fluid contact device according to appended note 4, wherein the supply mechanism is arranged to supply the contact fluid inside the contact pipe and includes a supply pipe having a bendable bent portion. (Appended note 6) The fluid contact device according to any one of appended notes 3 to 5, wherein the average cross-sectional area of the flow path of the discharge port is less than or equal to the average cross-sectional area of the flow path of the discharge port. (Appended note 7) A fluid contact device according to any one of appended notes 1 to 6, a tank body in which the fluid contact device is disposed inside, and a liquid treatment device having the same.

Explanation of reference numerals

[0067] 10 Liquid treatment device 12 Fluid contact device 14 Tank body 16 U-shaped pipe 18 Contact pipe 18B Lower end of the contact pipe 18H Inlet 20 Discharge pipe 22 Supply mechanism 28 Discharge port 30 Open portion 32 Holding plate 34 Gas generator 36 Bubble generating member 38 Inflow pipe 40 Inlet 42 Treated liquid storage section 44 Bent portion 46 Bellows 48 Bellows 50 Flexible portion 52 Weight member 54 Supply pipe 56 Cover member 60 Liquid treatment device 62 Fluid contact device 64 Curved portion 70 Liquid treatment device 72 Fluid contact device LL Upper limit liquid level SL Upper limit liquid level 80 Liquid treatment device 82 Fluid contact device TW1 Water before treatment TW2 Water during treatment TW3 Treated water

Claims

1. A contact tube including an inlet through which a liquid is introduced and an outlet located below the inlet and through which the liquid is discharged; a supply mechanism for supplying a contact gas having a smaller specific gravity than the liquid into the contact tube from a position below the discharge port or at the same height as the discharge port; A fluid contact device comprising:

2. 2. The fluid contactor according to claim 1, wherein the outlet is located below an upper limit liquid level that is an upper limit of the liquid level in the contact tube.

3. 2. The fluid contactor according to claim 1, further comprising a discharge pipe which is in communication with the discharge port, extends to the outside of the contact tube, and has an opening which opens at a position lower than the inlet port.

4. 4. The fluid contactor according to claim 3, wherein at least the contact tube has a bent portion capable of being bent and deformed.

5. 5. The fluid contactor according to claim 4, wherein the supply mechanism comprises a supply pipe having a bent portion that is bendable and arranged so that the contact gas is supplied to the inside of the contact tube.

6. 4. The fluid contact device of claim 3, wherein an average cross-sectional area of ​​the flow passages of the outlet is equal to or less than an average cross-sectional area of ​​the flow passages of the outlet.

7. A contact tube including an inlet through which a liquid is introduced and an outlet located below the inlet and through which the liquid is discharged; a supply mechanism for supplying a contact gas having a smaller specific gravity than the liquid into the contact tube from a position below an upper liquid level, which is an upper limit of the liquid level in the contact tube; an open portion that is in communication with the discharge port, extends to the outside of the contact tube, and is open at a position lower than the inlet; A fluid contact device comprising:

8. A fluid contact device according to any one of claims 1 to 7, A tank body in which the fluid contact device is disposed; A liquid treatment device comprising:

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