Gas-liquid contact device

Abstract

To provide a gas-liquid contact device which is advantageous for improving gas-liquid contact efficiency.SOLUTION: A gas-liquid contact device 1 comprises a gas liquid contact unit 2 which has a plurality of areas which are in communication with each other in a horizontal direction and each of which has a filler 22 installed therein. The filler 22 includes first filling members 50 and second filling members 51 which are shaped in plates parallel to a direction of supply of liquid L to the fillers 22 and a direction of supply of a gas G, and which are laid on top of each other. The first filling members 50 and the second filling members 51 are at least partially waved plates, where a waviness direction of the wave plates of the first filling member 50 and a waviness direction of the wave plates of the second filling member 51 are inclined in opposite directions to each other with respect to a vertical direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a gas liquid contactor. [Background technology]

[0002] Conventionally, gas separation and capture systems that utilize gas-liquid contact to separate, remove, or capture a specific gas from a gas to be treated, such as exhaust gas containing various types of gases, have been used in chemical plants, thermal power plants, etc. For example, a carbon dioxide separation and capture system absorbs and separates carbon dioxide by contacting a gas containing carbon dioxide with an absorbing liquid such as an aqueous monoethanolamine solution, and releases the carbon dioxide into the gas phase by heating the absorbing liquid after absorption and bringing it into gas-liquid contact, thereby capturing the carbon dioxide.

[0003] Generally, a gas-liquid contactor used in a gas separation and recovery system includes a gas-liquid contact section having a packing material for increasing the contact area between the liquid and the gas. When the liquid and the gas come into gas-liquid contact on the surface of the packing material, the specific gas components and heat in the gas are absorbed by the liquid. In addition, the gas-liquid contactor has such gas-liquid contact sections arranged vertically to increase the contact area between the gas and the liquid, thereby improving the contact efficiency. In particular, in a gas-liquid contact section using a plurality of parallel vertical flat plates as packing material, the pressure loss due to the flow resistance of the gas is small, so that even if a plurality of gas-liquid contact sections are stacked in multiple stages, the energy consumption in the gas-liquid contact process can be kept low. However, in a multi-stage structure in which a plurality of gas-liquid contact sections are stacked in the vertical direction, there is a limit to increasing the number of stages to increase the contact efficiency. In addition, in a gas-liquid contactor such as an absorption tower, there is a limit to increasing the volume ratio of the gas-liquid contact section.

[0004] In response to this, Patent Document 1 discloses a gas-liquid contactor having a multi-stage structure in which a plurality of gas-liquid contact sections, each of which is provided with a plate-shaped packing, are arranged in the horizontal direction. With such a gas-liquid contactor, when an attempt is made to add more gas-liquid contact sections, the expansion is in the horizontal direction, making it easier to add more sections than a gas-liquid contactor in which the number of stages is increased in the vertical direction.

[0005] In addition, in a gas-liquid contactor in which a plurality of gas-liquid contact parts are stacked vertically, liquid and gas flow in countercurrent in the gas-liquid contact parts. In contrast, in the gas-liquid contactor disclosed in Patent Document 1, liquid flows vertically and gas flows horizontally in the gas-liquid contact parts, so that the so-called flooding phenomenon, in which the operation becomes impossible due to a decrease in pressure, is unlikely to occur. Therefore, in the gas-liquid contactor disclosed in Patent Document 1, the flow rate of the liquid can be increased more easily than in a gas-liquid contactor in which a plurality of gas-liquid contact parts are stacked vertically. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2018-86635 A Summary of the Invention [Problem to be solved by the invention]

[0007] The gas-liquid contactor disclosed in Patent Document 1 is advantageous in the above respects over a gas-liquid contactor in which multiple gas-liquid contact sections are stacked in the vertical direction. However, there is room for further improvement, for example, in terms of further improving the gas-liquid contact efficiency.

[0008] Therefore, an object of the present disclosure is to provide a gas-liquid contactor which is advantageous in improving gas-liquid contact efficiency or reducing manufacturing costs. [Means for solving the problem]

[0009] A gas-liquid contactor according to one embodiment of the present disclosure includes a gas-liquid contact section having a plurality of regions that are connected to each other in a horizontal direction and each of which contains a packing material; a liquid supply system that supplies liquid to the packing material from above in the vertical direction for each region while sequentially circulating liquid through the plurality of regions along the arrangement of the plurality of regions; and a gas supply system that sequentially circulates gas through the plurality of regions along the arrangement of the plurality of regions to bring the gas into contact with the liquid for each region. The packing material includes first and second packing members that are plate-shaped and parallel to the liquid supply direction and the gas supply direction to the packing material and are alternately stacked, and at least a portion of the first and second packing members are corrugated plates, and the corrugation direction of the corrugated plate of the first packing member and the corrugation direction of the corrugated plate of the second packing member are inclined in opposite directions to each other with respect to the vertical direction. In adjacent regions, the pitch of the corrugations in the corrugated plate constituting the packing material in the region closer to the gas introduction position is smaller than the pitch of the corrugations in the corrugated plate constituting the packing material in the region farther from the gas introduction position.

[0010] In the above gas-liquid contact device, the first packing member and the second packing member may be entirely corrugated. The first packing member and the second packing member may each have a corrugated portion on the vertical upper side and a flat portion on the vertical lower side. The liquid supply system may include a pump for each of the multiple regions that supplies liquid temporarily stored below the packing material in the vertical direction to the packing material in the vertical direction, and the capacity of the pump may be different for each of the multiple regions in accordance with the difference in the pitch of the corrugated plate. Effect of the Invention

[0011] According to the present disclosure, it is possible to provide a gas-liquid contactor that is advantageous in improving gas-liquid contact efficiency or reducing manufacturing costs. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of a gas-liquid contactor according to a first embodiment. [Diagram 2] 1 is a cross-sectional view of the gas-liquid contactor according to the first embodiment, taken along the YZ plane. [Diagram 3] FIG. 2 is a perspective view of a third filling material including a partially exploded view in the first embodiment. [Figure 4] 4 is a plan view of a third filling material in the first embodiment as viewed from above in the Z direction. FIG. [Diagram 5] 4A to 4C are schematic side views illustrating alternatives to the filler in the first embodiment. [Figure 6] FIG. 5 is a schematic diagram showing the configuration of a gas-liquid contactor according to a second embodiment. [Figure 7] FIG. 5 is a cross-sectional view of the gas-liquid contactor according to the second embodiment, taken along the YZ plane. [Figure 8] FIG. 11 is a perspective view of a third filler including a partially exploded view in the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, some exemplary embodiments will be described with reference to the drawings. Here, the dimensions, materials, and other specific numerical values ​​shown in the embodiments are merely examples, and do not limit the present disclosure unless otherwise specified. In the drawings, the piping system through which the liquid flows is simply shown by solid lines. Furthermore, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present disclosure are not shown.

[0014] (First embodiment) 1 is a schematic diagram showing the configuration of a gas-liquid contactor 1 according to a first embodiment. The gas-liquid contactor 1 brings a liquid L into contact with a gas G, thereby causing a specific gas component contained in the gas G to be absorbed into the liquid L as an absorbing liquid.

[0015] Examples of the gas G include exhaust gas and reaction gas generated in facilities such as chemical plants and thermal power plants. In this case, in the gas-liquid contactor 1, carbon dioxide and acidic gases such as nitrogen oxides and sulfur oxides are treated as specific components.

[0016] The liquid L is selected according to the specific components to be removed from the gas G. When carbon dioxide is captured and removed, an aqueous solution of an alkaline agent such as a cyclic amine compound, an alkanol amine, a phenol amine, or an alkali metal salt may be used as the liquid L. When sulfur oxides are removed, an aqueous solution of an alkaline agent such as a calcium compound or a magnesium compound may be used as the liquid L. For example, if an aqueous solution of monoethanolamine (MEA) is used as the liquid L when carbon dioxide is captured and removed, carbamates, amine salts (carbamates), carbonates, bicarbonates, etc. are generated by reaction with carbon dioxide.

[0017] The gas-liquid contactor 1 includes a gas-liquid contact section 2, a liquid supply system 3, a gas supply system 4, and a container 21 that configures the gas-liquid contact section 2 therein. In each of the figures from Fig. 1 onwards, the Z direction is defined as the vertical direction as an example, and in the following description, the upper side in the Z direction may be simply referred to as "upper", and the lower side in the Z direction may be simply referred to as "lower".

[0018] The container 21 has a horizontally elongated shape. In Fig. 1 and subsequent figures, the X direction is defined as the longitudinal direction of the container 21, for example. The container 21 has, for example, a top plate 21t, a bottom plate 21b, and a pair of side walls 21s along the X direction, and a first end wall 21a and a second end wall 21d at both ends in the X direction. That is, more specifically, the shape of the container 21 is a substantially quadrangular prism whose cross section parallel to the YZ plane perpendicular to the X direction is substantially rectangular.

[0019] The gas-liquid contact section 2 has four regions, a first region 2a, a second region 2b, a third region 2c, and a fourth region 2d, which are allocated to be arranged in a horizontal direction along the X direction. Each region of the gas-liquid contact section 2 corresponds to one stage of a conventional gas-liquid contact section or gas-liquid contact phase.

[0020] Further, the gas-liquid contact section 2 has fillers 22 disposed in each region. Hereinafter, the filler 22 disposed in the first region 2a will be referred to as the first filler 22a. Similarly, the filler 22 disposed in the second region 2b will be referred to as the second filler 22b, the filler 22 disposed in the third region 2c as the third filler 22c, and the filler 22 disposed in the fourth region 2d as the fourth filler 22d. The specific shape of the filler 22 will be described in detail below.

[0021] Furthermore, the vessel 21 has, at the boundary between two adjacent regions in the gas-liquid contact section 2, an upper partition wall 23 and a lower partition wall 24 facing the upper partition wall 23 in the Z direction.

[0022] The upper partition walls 23 each protrude from the top plate 21t toward the bottom plate 21b. Of the upper partition walls 23, the one provided at the boundary between the first region 2a and the second region 2b is the first upper partition wall 23a. Similarly, the one provided at the boundary between the second region 2b and the third region 2c is the second upper partition wall 23b. The one provided at the boundary between the third region 2c and the fourth region 2d is the third upper partition wall 23c.

[0023] The lower partition walls 24 each protrude from the bottom plate 21b toward the top plate 21t. Of the lower partition walls 24, the one provided at the boundary between the first region 2a and the second region 2b is the first lower partition wall 24a. Similarly, the one provided at the boundary between the second region 2b and the third region 2c is the second lower partition wall 24b. The one provided at the boundary between the third region 2c and the fourth region 2d is the third lower partition wall 24c.

[0024] Between the upper partition wall 23 and the lower partition wall 24 facing the upper partition wall 23 in the Z direction is an opening 25. The first region 2a and the second region 2b communicate in the X direction through a first opening 25a sandwiched between the first upper partition wall 23a and the first lower partition wall 24a. Similarly, the second region 2b and the third region 2c communicate in the X direction through a second opening 25b sandwiched between the second upper partition wall 23b and the second lower partition wall 24b. The third region 2c and the fourth region 2d communicate in the X direction through a third opening 25c sandwiched between the third upper partition wall 23c and the third lower partition wall 24c.

[0025] In this embodiment, four regions are allocated to the gas-liquid contact section 2, but the number of regions allocated may be any number equal to or greater than two. In this embodiment, four regions are allocated evenly to the gas-liquid contact section 2, but for example, the lengths of the regions in the X direction may be different from each other.

[0026] The liquid supply system 3 supplies the liquid L to each of the packing materials 22 arranged in the multiple regions of the gas-liquid contact section 2. The liquid supply system 3 has a liquid inlet 31a for introducing the liquid L into the container 21, a liquid outlet 31b for discharging the liquid L from the container 21, and a circulation system 33 provided for each of the multiple regions.

[0027] In this embodiment, as will be mentioned in the description of the gas supply system 4, the container 21 has spatial regions between the gas inlet 41 and the fourth region 2d and between the gas outlet 42 and the first region 2a. In this case, the liquid inlet 31a may be provided on the bottom plate 21b of the container 21 so as to communicate with the spatial region between the gas outlet 42 and the first region 2a. The liquid outlet 31b may be provided on the bottom plate 21b of the container 21 so as to communicate with the spatial region between the gas inlet 41 and the fourth region 2d.

[0028] Furthermore, in the container 21, as one of the plurality of lower partition walls 24, a fourth lower partition wall 24d is installed at the boundary between the fourth region 2d and the spatial region between the gas inlet part 41 and the fourth region 2d.

[0029] The circulation system 33 has a liquid recovery port 34 provided on the lower side, a liquid distributor 35 provided on the upper side, and a reflux pipe 36 connecting the liquid recovery port 34 and the liquid distributor 35 with respect to one region in the gas-liquid contact section 2. Hereinafter, the circulation system 33 for the first region 2a will be referred to as the first circulation system 33a. Similarly, the circulation system 33 for the second region 2b will be referred to as the second circulation system 33b, the circulation system 33 for the third region 2c will be referred to as the third circulation system 33c, and the circulation system 33 for the fourth region 2d will be referred to as the fourth circulation system 33d. In accordance with these notations, the liquid recovery port 34, the liquid distributor 35, and the reflux pipe 36 included in the first circulation system 33a will be referred to as the first liquid recovery port 34a, the first liquid distributor 35a, and the first reflux pipe 36a, respectively. Similarly, the liquid recovery port 34, liquid distributor 35, and return pipe 36 included in the second circulation system 33b are respectively referred to as second liquid recovery port 34b, second liquid distributor 35b, and second return pipe 36b. The liquid recovery port 34, liquid distributor 35, and return pipe 36 included in the third circulation system 33c are respectively referred to as third liquid recovery port 34c, third liquid distributor 35c, and third return pipe 36c. The liquid recovery port 34, liquid distributor 35, and return pipe 36 included in the fourth circulation system 33d are respectively referred to as fourth liquid recovery port 34d, fourth liquid distributor 35d, and fourth return pipe 36d.

[0030] Here, the bottom plate 21b of the container 21 is formed in a concave shape, a so-called funnel shape, inclined so that the center is lowest, for each region of the gas-liquid contact section 2. The multiple liquid recovery ports 34 are each connected to the bottom of the concave shape of the corresponding bottom plate 21b.

[0031] The liquid distributor 35 disperses the liquid L supplied through the reflux pipe 36 downward. The liquid distributor 35 is, for example, a liquid distributor having a drip point density (the number of liquid supply points per area) of 100 to 3000 points / m. 2 Approximately 500 to 3000 points / m is more preferable. 2A so-called shower head type liquid distributor, which has a capacity of about 1000 sq. m, can be used. The shower head type liquid distributor is mainly composed of a distribution pipe for guiding and distributing the liquid L to each drip point, for example.

[0032] A pump 37 is provided in the return pipe 36 between the liquid recovery port 34 and the liquid distributor 35 as a power source for supplying liquid transport energy. The liquid L collected in the liquid recovery port 34 is supplied to the liquid distributor 35 by driving the pump 37. The flow rate of the liquid L flowing through the return pipe 36 can be adjusted by an operator adjusting the driving speed of the pump 37. Hereinafter, the pump 37 for the first region 2a will be referred to as a first pump 37a. Similarly, the pump 37 for the second region 2b will be referred to as a second pump 37b, the pump 37 for the third region 2c as a third pump 37c, and the pump 37 for the fourth region 2d as a fourth pump 37d.

[0033] In addition, the reflux pipe 36 may be provided with a heat exchanger 38 for adjusting the temperature of the liquid L. As will be described in detail below, in this embodiment, the liquid L introduced into the gas-liquid contact section 2 from the liquid inlet 31a moves from the first region 2a to the adjacent regions in sequence. Here, if a temperature change occurs in the liquid L due to gas-liquid contact while moving sequentially between the regions, the temperature change of the liquid L can be suppressed by using the heat exchanger 38. Hereinafter, the heat exchanger 38 for the first region 2a will be referred to as the first heat exchanger 38a. Similarly, the heat exchanger 38 for the second region 2b will be referred to as the second heat exchanger 38b, the heat exchanger 38 for the third region 2c will be referred to as the third heat exchanger 38c, and the heat exchanger 38 for the fourth region 2d will be referred to as the fourth heat exchanger 38d.

[0034] In the liquid supply system 3, first, the liquid L is introduced from the liquid inlet 31a into the first region 2a in the gas-liquid contact section 2. Since the liquid inlet 31a is connected to the bottom plate 21b of the container 21, the introduced liquid L is directed toward the first liquid recovery port 34a in the first region 2a. Next, when the first pump 37a is driven, the liquid L recovered at the first liquid recovery port 34a is supplied to the first liquid distributor 35a through the first return pipe 36a. Then, the first liquid distributor 35a sprays the supplied liquid L downward. Since the first filling material 22a is disposed below the first liquid distributor 35a, the first filling material 22a is wetted with the liquid L by the spraying of the liquid L by the first liquid distributor 35a. The liquid L attached to the first filling material 22a eventually flows down toward the bottom plate 21b in the first region 2a. Since the first liquid recovery port 34a is connected to the bottom plate 21b, the liquid L circulates within the first region 2a.

[0035] On the other hand, a first lower partition wall 24a is provided at the boundary between the first region 2a and the second region 2b on the bottom plate 21b of the container 21. Therefore, even if the liquid L is introduced from the liquid inlet 31a and the liquid L flows down from the first filler 22a, a certain amount of the liquid L is temporarily stored on the bottom plate 21b in the first region 2a. However, as the introduction of the liquid L from the liquid inlet 31a progresses, the amount of the liquid L stored in the first region 2a gradually increases. Then, when the liquid level of the stored liquid L exceeds the height of the first lower partition wall 24a, the amount of the liquid L corresponding to the newly introduced amount flows over the first lower partition wall 24a and into the adjacent second region 2b.

[0036] The liquid L that has flowed into the second region 2b flows toward the second liquid recovery port 34b in the second region 2b. When the second pump 37b is driven, the liquid L recovered at the second liquid recovery port 34b is supplied to the second liquid distributor 35b through the second return pipe 36b, and is sprayed downward from the second liquid distributor 35b. The second filler 22b disposed below the second liquid distributor 35b is wetted with the liquid L by the spraying of the liquid L by the second liquid distributor 35b. The liquid L that has adhered to the second filler 22b eventually flows down toward the bottom plate 21b in the second region 2b, and is again recovered at the second liquid recovery port 34b. That is, the liquid L circulates in the second region 2b as well. Meanwhile, a second lower partition wall 24b is provided at the boundary between the second region 2b and the third region 2c in the bottom plate 21b. Therefore, similar to the first region 2a, a certain amount of liquid L is temporarily stored on the bottom plate 21b in the second region 2b. However, when the liquid level of the stored liquid L exceeds the height of the second lower partition wall 24b, the liquid L corresponding to the new inflow amount from the first region 2a jumps over the second lower partition wall 24b and flows into the adjacent third region 2c.

[0037] The liquid L that has flowed into the third region 2c flows toward the third liquid recovery port 34c in the third region 2c. When the third pump 37c is driven, the liquid L recovered at the third liquid recovery port 34c is supplied to the third liquid distributor 35c through the third return pipe 36c, and is sprayed downward from the third liquid distributor 35c. The third filler 22c disposed below the third liquid distributor 35c is wetted with the liquid L by the spraying of the liquid L by the third liquid distributor 35c. The liquid L that has adhered to the third filler 22c eventually flows down toward the bottom plate 21b in the third region 2c, and is again collected at the third liquid recovery port 34c. That is, the liquid L circulates in the third region 2c. Meanwhile, a third lower partition wall 24c is provided at the boundary between the third region 2c and the fourth region 2d in the bottom plate 21b. Therefore, similar to the first region 2a, a certain amount of liquid L is temporarily stored on the bottom plate 21b in the third region 2c. However, when the liquid level of the stored liquid L exceeds the height of the third lower partition wall 24c, the liquid L corresponding to the new inflow amount from the second region 2b jumps over the third lower partition wall 24c and flows into the adjacent fourth region 2d.

[0038] The liquid L that has flowed into the fourth region 2d heads toward the fourth liquid recovery port 34d in the fourth region 2d. When the fourth pump 37d is driven, the liquid L recovered at the fourth liquid recovery port 34d is supplied to the fourth liquid distributor 35d through the fourth return pipe 36d and is sprayed downward from the fourth liquid distributor 35d. The liquid L is sprayed by the fourth liquid distributor 35d, so that the fourth filler 22d disposed below the fourth liquid distributor 35d is wetted with the liquid L. The liquid L that has adhered to the fourth filler 22d eventually flows down toward the bottom plate 21b in the fourth region 2d and is again recovered at the fourth liquid recovery port 34d. That is, the liquid L circulates in the fourth region 2d. A fourth lower partition wall 24d is provided at the boundary between the fourth region 2d on the bottom plate 21b of the container 21 and the spatial region between the gas introduction section 41 and the fourth region 2d. Therefore, similarly to the first region 2a, a certain amount of liquid L is temporarily stored on the bottom plate 21b in the fourth region 2d. However, when the liquid level of the stored liquid L exceeds the height of the fourth lower partition wall 24d, the liquid L corresponding to the new inflow amount from the third region 2c jumps over the fourth lower partition wall 24d and flows into the spatial region between the gas inlet 41 and the fourth region 2d.

[0039] Then, the liquid L that has flowed into the spatial region between the gas inlet 41 and the fourth region 2d flows toward the liquid outlet 31b and is discharged from the container 21 to the outside.

[0040] The gas supply system 4 distributes the gas G through the gas-liquid contact section 2. The gas supply system 4 has a tubular gas inlet section 41 and a tubular gas outlet section 42. In this embodiment, the gas G is distributed through the fourth region 2d, the third region 2c, the second region 2b, and the first region 2a in this order. That is, in each region, the direction in which the liquid L is sprayed by the liquid supply system 3 and the direction in which the gas G is supplied by the gas supply system 4 intersect with each other.

[0041] The gas inlet 41 is provided at approximately the center of the second end wall 21d of the container 21 so as to communicate with the fourth region 2d which flows first. The gas outlet 42 is provided at approximately the center of the first end wall 21a of the container 21 so as to communicate with the first region 2a which flows last. In the container 21, spatial regions are provided between the gas inlet 41 and the fourth region 2d, and between the gas outlet 42 and the first region 2a.

[0042] Furthermore, in the gas supply system 4, a demister 43 may be installed in the spatial region between the gas exhaust part 42 and the first region 2a in order to suppress entrainment and discharge of fine droplets in the gas G discharged from the gas exhaust part 42. As the demister 43, a mesh-like or porous member such as a wire mesh or a perforated plate can be used.

[0043] In this embodiment, the gas G is supplied in the gas supply system 4 by utilizing the flow pressure of the gas G supplied from the outside, and no power source for the gas supply is shown in the drawing. However, if necessary, an air supply means such as a pump or a fan may be used.

[0044] In the gas supply system 4, first, the gas G is introduced from the gas introduction section 41 into the fourth region 2d in the gas-liquid contact section 2. Since the fourth packing material 22d is arranged in the fourth region 2d, the gas G passes through the internal space of the fourth packing material 22d and heads toward the third opening 25c. Next, the gas G is introduced from the fourth region 2d to the third region 2c through the third opening 25c. Since the third packing material 22c is arranged in the third region 2c, the gas G passes through the internal space of the third packing material 22c and heads toward the second opening 25b. Next, the gas G is introduced from the third region 2c to the second region 2b through the second opening 25b. Since the second packing material 22b is arranged in the second region 2b, the gas G passes through the internal space of the second packing material 22b and heads toward the first opening 25a. Next, the gas G is introduced from the second region 2b to the first region 2a through the first opening 25a. Since the first filler 22a is disposed in the first region 2a, the gas G passes through the internal space of the first filler 22a and heads toward the gas exhaust section 42. Then, the gas G is discharged from inside the container 21 to the outside through the gas exhaust section 42.

[0045] Here, the heights of the multiple upper partition walls 23 on the top plate 21t side are set so that their lower ends come into contact with the packing material 22. As a result, the upper partition walls 23 can prevent the gas G from avoiding the internal space of the packing material 22 and flowing above it. On the other hand, the heights of the multiple lower partition walls 24 on the bottom plate 21b side are set so that they are higher than the lower end of the packing material 22 and can maintain the liquid L at a constant level. In other words, the liquid level of the liquid L stored in each region in the gas-liquid contact section 2 is set to reach the lower end of the packing material 22, that is, the lower end of the packing material 22 is set to come into contact with the stored liquid L. As a result, the lower partition walls 24 can prevent the gas G from avoiding the internal space of the packing material 22 and flowing below it.

[0046] Next, the filler 22 employed in this embodiment will be described in detail. There are four fillers in the gas-liquid contact section 2, namely, a first filler 22a, a second filler 22b, a third filler 22c, and a fourth filler 22d. In this embodiment, the shapes of these fillers are the same. Therefore, in the following description of the filler 22, the third filler 22c will be taken up as a representative.

[0047] Fig. 2 corresponds to a cross section II-II set in the third region 2c of the gas-liquid contact section 2 shown in Fig. 1, and is a cross-sectional view of the gas-liquid contactor 1 cut along the YZ plane. Fig. 3 is a perspective view of the third packing material 22c, including a partially exploded view.

[0048] The third filler 22c is formed by combining a plurality of filling members. Each of the plurality of filling members is a corrugated plate. In this embodiment, each filling member is classified into two types of filling members having different corrugation directions, that is, the first filling member 50 or the second filling member 51. In this embodiment, the corrugation pitch and plate thickness of the first filling member 50 and the second filling member 51 are the same. The pitch of the first filling member 50 and the second filling member 51 may be different from each other. The plate thickness of the first filling member 50 and the second filling member 51 may be different from each other.

[0049] Moreover, when the first filling member 50 and the second filling member 51 are regarded as a single flat plate as a whole, the main plane of these flat plates is parallel to the XZ plane. That is, the first filling member 50 and the second filling member 51 are maintained in a posture along the XZ plane in the third filling material 22c. Here, the X direction corresponds to the introduction direction of the gas G into the third filling material 22c. The Z direction corresponds to the spray direction of the liquid L from the third liquid distributor 35c to the third filling material 22c. Moreover, in this embodiment, the dimensions of the first filling member 50 and the second filling member 51 in the X direction, Y direction, and Z direction are approximately the same as each other.

[0050] The first filling member 50 has a plurality of first peaks 50a protruding along the Y direction and a plurality of first valleys 50b protruding on the opposite side to the first peaks 50a. That is, the waveform of the first filling member 50 is formed by an alternating combination of the first peaks 50a and the first valleys 50b. As shown in FIG. 3, the extension direction of the first peaks 50a and the first valleys 50b is inclined by a first angle θ1 toward the negative side of the X direction with respect to the Z direction. The wavy direction of the first filling member 50 is a direction that intersects at a right angle on the XZ plane with the extension direction of the first peaks 50a and the first valleys 50b.

[0051] The second filling member 51 has a plurality of second peaks 51a protruding along the Y direction and a plurality of second valleys 51b protruding on the opposite side to the second peaks 51a. That is, the corrugations of the second filling member 51 are formed by an alternating combination of the second peaks 51a and the second valleys 51b. As shown in FIG. 3, the extension direction of the second peaks 51a and the second valleys 51b is inclined by a second angle θ2 toward the positive side of the X direction with respect to the Z direction. The corrugation direction of the second filling member 51 is a direction that intersects at a right angle on the XZ plane with the extension direction of the second peaks 51a and the second valleys 51b.

[0052] In this way, the directions in which the first angle θ1 and the second angle θ2 are inclined with respect to the Z direction are opposite to each other in the X direction. That is, the corrugation direction of the corrugated sheet of the first filling member 50 and the corrugation direction of the corrugated sheet of the second filling member 51 are inclined in opposite directions with respect to the Z direction. In this embodiment, the first angle θ1 and the second angle θ2 are each 45°. In this case, the corrugation direction of the first filling member 50 and the corrugation direction of the second filling member 51 are perpendicular to each other on the XZ plane. The first angle θ1 and the second angle θ2 may be values ​​other than 45°, but are at least within the range of 1° to 89°. The values ​​of the first angle θ1 and the second angle θ2 may be different from each other.

[0053] In the third filling material 22c, the first filling members 50 and the second filling members 51 are alternately stacked along the Y direction. In the present embodiment, the third filling material 22c includes, as an example, four first filling members 50 and four second filling members 51. That is, the third filling material 22c is configured by combining eight filling members. Since the eight filling members can be regarded as flat plates having the same general shape, the general shape of the third filling material 22c is a rectangular parallelepiped.

[0054] Each part constituting the gas-liquid contactor 1 is manufactured from a material that is resistant to the components of the gas G and the chemicals contained in the liquid L. Examples of such materials include metals such as stainless steel, aluminum, nickel, titanium, carbon steel, brass, copper, Monel, silver, tin, and niobium, and resins such as polyethylene, polypropylene, and PTFE. In addition, the filling members such as the first filling member 50 and the second filling member 51 constituting the filling material 22 are also made of a corrosion-resistant material that does not react (corrode) with the gas G or the liquid L, at least on the surface. The material of the filling member may be one that has been given surface roughness by forming minute irregularities on the surface through surface processing such as filing, sandblasting, ultraviolet ozone treatment, and plasma treatment. Alternatively, the material of the filling member may be one that has been prepared to suit the conditions of use by modifying the surface through coating or the like.

[0055] Next, the operation of the gas-liquid contactor 1 will be described.

[0056] First, the gas-liquid contactor 1 operates the liquid supply system 3 to supply the liquid L to the gas-liquid contact section 2. As a result, in the first region 2a, the second region 2b, the third region 2c, and the fourth region 2d in the gas-liquid contact section 2, the liquid L is sequentially sprayed onto each of the packing materials 22 arranged in each region.

[0057] 4 is a plan view of the third filler 22c as a representative of the plurality of fillers 22, seen from above in the Z direction. In each of the fillers 22 including the third filler 22c, the first filler 50 and the second filler 51 are combined alternately and in contact with each other. Here, the first filler 50 and the second filler 51 are each a corrugated plate. Therefore, in a state in which the first filler 50 and the second filler 51 are combined, a part of the first valley portion 50b and a part of the second peak portion 51a, and a part of the second valley portion 51b and a part of the first peak portion 50a are in contact with each other.

[0058] In the first filling member 50 and the second filling member 51, the spaces between the walls forming the corrugations are formed. Meanwhile, the extension direction of the first peaks 50a and the first valleys 50b in the first filling member 50 is inclined by a first angle θ1 with respect to the Z direction. Similarly, the extension direction of the second peaks 51a and the second valleys 51b in the second filling member 51 is inclined by a second angle θ2 with respect to the Z direction. Therefore, when the third filling material 22c is viewed from above in the Z direction as shown in FIG. 4, a part of the wall of either the first filling material 50 or the second filling material 51 is visible through the spaces present in the first filling member 50 and the second filling member 51. In other words, when the third filling material 22c is viewed from above in the Z direction, the back side of the third filling material 22c cannot be viewed through the spaces present in the first filling member 50 and the second filling member 51.

[0059] 2, the liquid L sprayed from the third liquid distributor 35c toward the third filler 22c in the third region 2c comes into contact with any part of the third filler 22c before reaching the storage portion on the bottom plate 21b below the third filler 22c. The liquid L that reaches the third filler 22c flows along the wall surface inclined at the first angle θ1 of the first filler member 50 or the wall surface inclined at the second angle θ2 of the second filler member 51, forming a liquid film on each wall surface. Finally, the liquid L flows down toward the bottom plate 21b.

[0060] Meanwhile, the liquid L is initially sprayed from the third liquid distributor 35c toward the third filler 22c along the Z direction. However, after the liquid L reaches the third filler 22c, the direction of movement of the liquid L changes according to the inclination of the waveform of each filler member. If the waveforms of the multiple filler members constituting the filler 22 are biased to be inclined toward either the positive side of the X direction or the negative side of the X direction, the direction in which the liquid L flows down within the filler 22 will be biased. Therefore, in this case, the filler 22 may be largely divided into an area that is easily wetted by the liquid L and an area that is not easily wetted by the liquid L.

[0061] In contrast, in this embodiment, the third filling material 22c is formed by alternately overlapping first filling members 50 whose waveforms are inclined toward the negative side of the X-direction and second filling members 51 whose waveforms are inclined toward the positive side of the X-direction. Therefore, the third filling material 22c is not easily divided into regions that are easily wetted by the liquid L and regions that are not easily wetted by the liquid L. As a result, a liquid film of the liquid L can be formed over as wide an area as possible of each wall surface of the first filling member 50 and the second filling member 51.

[0062] 4, attention has been focused on the third filler 22c as a representative of the plurality of fillers 22, but the other fillers, the first filler 22a, the second filler 22b and the fourth filler 22d, are also wetted by the liquid L in the same manner. The movement of the liquid L in the gas-liquid contact section 2 is as described above for the liquid supply system 3.

[0063] Next, the gas-liquid contact device 1 operates the gas supply system 4 to supply the gas G to the gas-liquid contact section 2. First, the gas G introduced from the gas inlet 41 into the gas-liquid contact section 2 heads toward the fourth packing material 22d in the fourth region 2d. The fourth packing material 22d is formed by alternately stacking the first packing members 50 and the second packing members 51, similar to the third packing material 22c described above. Therefore, even if the gas G enters either the space between the first packing member 50 or the second packing member 51, it is influenced by the waveforms of both the first packing member 50 and the second packing member 51 facing each other, and is discharged from the fourth packing material 22d generally along the X direction. Subsequently, the gas G discharged from the fourth packing material 22d similarly flows through the third region 2c, the second region 2b, and the first region 2a in that order. As a result, in each region, the liquid film of the liquid L formed on each filler 22 comes into contact with the gas G supplied from the gas supply system 4, and the specific gas components and the like in the gas G are absorbed by the liquid L. Then, the liquid L having absorbed the specific gas components and the like is eventually discharged to the outside of the container 21 from the liquid outlet 31b.

[0064] In this embodiment, the order in which the liquid L supplied by the liquid supply system 3 flows through each region is opposite to the order in which the gas G supplied by the gas supply system 4 flows through each region, so that countercurrent contact is performed throughout the gas-liquid contact section 2. In contrast, the gas-liquid contactor 1 can perform parallel flow contact by reversing the installation positions of the gas inlet section 41 and the gas outlet section 42 and supplying the liquid L and gas G to each region in the same order.

[0065] Here, the flow resistance of the gas G when the gas G contacts the liquid L affects the energy consumption during the operation of the gas-liquid contactor 1. Therefore, the size and number of packing members in one packing material 22, the plate thickness of each packing member, or the pitch dimension defining the waveform of each packing member are set in consideration of the wetted area (gas-liquid contact area) per unit volume in the packing material 22, etc.

[0066] In the above description, the shapes of the fillers 22 provided in the respective regions of the gas-liquid contact section 2 are the same, but the shapes of the fillers 22 may differ from region to region.

[0067] FIG. 5 is a schematic side view illustrating a first filler 122a, a second filler 122b, a third filler 122c and a fourth filler 122d, which can replace the first filler 22a, the second filler 22b, the third filler 22c and the fourth filler 22d in the gas-liquid contact section 2.

[0068] The first filler 122a is a filler placed in the first region 2a, replacing the above-mentioned first filler 22a. In FIG. 5, a first filler member 60 made of a corrugated plate having first peaks 60a is depicted as part of the first filler 122a. The pitch of the corrugation of the first filler member 60, which is expressed as the distance between the first peaks 60a, is a first pitch P1. Although not shown, the first filler 122a includes a second filler member, similar to the second filler member 51 in the first filler 22a.

[0069] The second filler 122b is a filler placed in the second region 2b in place of the second filler 22b. In FIG. 5, a corrugated first filler 62 having first peaks 62a is depicted as part of the second filler 122b. The pitch of the corrugation of the first filler 62, which is expressed as the distance between the first peaks 62a, is a second pitch P2. Although not shown, the second filler 122b includes a second filler, similar to the second filler 51 in the second filler 22b.

[0070] The third filler 122c is a filler placed in the third region 2c, replacing the third filler 22c. In FIG. 5, a first filler member 64 made of a corrugated plate having first peaks 64a is depicted as part of the third filler 122c. The pitch of the corrugation of the first filler member 64, which is expressed as the distance between the first peaks 64a, is a third pitch P3. Although not shown, the third filler 122c includes a second filler member, similar to the second filler member 51 in the third filler 22c.

[0071] The fourth filler 122d is a filler placed in the fourth region 2d, replacing the fourth filler 22d. In FIG. 5, a first filler member 66 made of a corrugated plate having first peaks 66a is depicted as part of the fourth filler 122d. The pitch of the corrugation of the first filler member 66, which is expressed as the distance between the first peaks 66a, is a fourth pitch P4. Although not shown, the fourth filler 122d includes a second filler member, similar to the second filler member 51 in the fourth filler 22d.

[0072] When comparing multiple packing materials, the packing material with a smaller pitch of the corrugation of the packing material and a larger number of sheets has a larger gas-liquid contact area, but the flow resistance of the gas G increases. Therefore, as shown in FIG. 5, the shapes of the multiple packing materials may be set so that the pitch of the corrugation gradually decreases from the fourth packing material 122d closest to the introduction position of the gas G to the first packing material 122a farthest from the introduction position of the gas G. That is, in the example shown in FIG. 5, the relationship of fourth pitch P4>third pitch P3>second pitch P2>first pitch P1 is established. By setting the shapes of the multiple packing materials in each packing material 122 in this way, the size of the gas-liquid contact area and the flow resistance of the gas G can be balanced in the entire gas-liquid contact section 2, and the most appropriate gas-liquid contact efficiency can be obtained.

[0073] 5, when the shape of the filling member constituting the packing material is changed for each region of the gas-liquid contact section 2, the allowable flow rate of the liquid L or gas G also differs for each region. Therefore, the capacity required for each pump 37 present in each region as part of the liquid supply system 3 also differs. Therefore, for example, if the capacity of the pump 37 can be reduced by changing the shape of the filling member in a certain region of the gas-liquid contact section 2, it is not necessary to adopt a pump 37 with a high capacity.

[0074] Next, the effects of the gas-liquid contactor 1 will be described.

[0075] The gas-liquid contactor 1 according to the present embodiment includes a gas-liquid contact section 2 having a plurality of regions, for example, a first region 2a, a second region 2b, a third region 2c, and a fourth region 2d, which are horizontally connected to each other and in which a packing material 22 is installed. The gas-liquid contactor 1 includes a liquid supply system 3 that supplies the liquid L to the packing material 22 from above in the vertical direction for each region while sequentially circulating the liquid L through the plurality of regions along the arrangement of the plurality of regions. The gas-liquid contactor 1 also includes a gas supply system 4 that sequentially circulates the gas G through the plurality of regions along the arrangement of the plurality of regions to contact the gas G with the liquid L for each region. The packing material 22 includes a first packing member 50 and a second packing member 51, each of which is plate-shaped and parallel to the supply direction of the liquid L and the supply direction of the gas to the packing material 22, and which are alternately stacked. At least a portion of the first packing member 50 and the second packing member 51 is a corrugated plate. The corrugation direction of the corrugated sheet of the first filling member 50 and the corrugation direction of the corrugated sheet of the second filling member 51 are inclined in opposite directions to each other with respect to the vertical direction.

[0076] First, in the gas-liquid contactor 1, a plurality of regions in which the packing material 22 is installed are arranged in the horizontal direction in the gas-liquid contact section 2. Therefore, when an attempt is made to add more gas-liquid contact sections, the expansion is in the horizontal direction, so that it is easier to add more than in a gas-liquid contactor in which the number of stages is increased in the vertical direction. Also, in the gas-liquid contactor 1, the liquid L flows approximately in the vertical direction and the gas G flows approximately in the horizontal direction in the gas-liquid contact section 2, so that the flooding phenomenon is unlikely to occur. Therefore, in the gas-liquid contactor 1, it is easier to increase the flow rate of the liquid L than in a gas-liquid contactor in which a plurality of gas-liquid contact sections are stacked in the vertical direction. However, it is desirable to set the flow velocity of the gas G to 1.0 m / s or less, taking into consideration the need to prevent the liquid L from being blown off the surface of the packing material 22 by the flow of the gas G.

[0077] In the gas-liquid contactor 1, at least a part of each of the first packing member 50 and the second packing member 51 constituting the packing material 22 is a corrugated plate. The corrugation direction of the first packing member 50 and the corrugation direction of the second packing member 51 are inclined in opposite directions to each other with respect to the vertical direction. The first packing member 50 and the second packing member 51 are alternately stacked. In consideration of such conditions, as described with reference to FIG. 4, the shape of the packing material 22 is such that in each region, the liquid L sprayed from the liquid distributor 35 toward the packing material 22 contacts any part of the packing material 22 while flowing down the packing material 22. Therefore, according to the gas-liquid contactor 1, the gas-liquid contact area of ​​the packing material 22 can be made wider and the liquid film of the liquid L can be more efficiently formed on the wall surface of the packing material 22, resulting in improved gas-liquid contact efficiency.

[0078] As a comparative example, consider a case where the packing members constituting the packing are all flat plates spaced apart from each other at a fixed interval. In this case, some of the liquid L sprayed from the liquid distributor 35 adheres directly to the flat plates to form a liquid film on the wall surface, while some falls vertically downward without adhering to the flat plates. In other words, less liquid L is used for gas-liquid contact compared to this embodiment.

[0079] 1 and the following drawings, it is preferable that the first filling member 50 and the second filling member 51 are entirely corrugated plates in terms of forming a liquid film of the liquid L over a wider range in the filling material 22. However, this is not limited to the present embodiment, and if only a certain range of the first filling member 50 and the second filling member 51 is corrugated rather than only a portion of the first filling member 50 and the second filling member 51 is corrugated, the above-mentioned effect can be achieved compared to when the entirety is flat.

[0080] As described above, according to the present embodiment, it is possible to provide a gas-liquid contactor 1 that is advantageous in improving the gas-liquid contacting efficiency.

[0081] Note that the alternate stacking of the first filling members 50 and the second filling members 51 is not necessarily limited to the case where the first filling members 50 and the second filling members 51 are alternately stacked one by one. For example, a unit in which two first filling members 50 are stacked and a unit in which two second filling members 51 are stacked may be alternately stacked.

[0082] In the gas-liquid contactor 1, the corrugation pitch of the corrugated plate may be different for each of the packing materials 22 installed in each of the multiple regions.

[0083] As explained using Figure 5, such a gas-liquid contactor 1 makes it possible to achieve a balance between the size of the gas-liquid contact area and the flow resistance of the gas G throughout the entire gas-liquid contact section 2, thereby obtaining the most appropriate gas-liquid contact efficiency.

[0084] Furthermore, in the gas-liquid contactor 1, the liquid supply system 3 may include a pump 37 for each of the multiple regions that supplies the liquid L temporarily stored below the packing material 22 in the vertical direction to above the packing material 22 in the vertical direction. In this case, the capacity of the pump 37 may be different for each of the multiple regions in accordance with the difference in the pitch of the corrugated sheet.

[0085] According to such a gas-liquid contactor 1, as described with reference to Fig. 5, it is not necessary to uniformly match the capacity of each of the pumps 37 installed in each region to the pump 37 that requires the most capacity in a certain region. Therefore, depending on the pump 37 installed in a certain region, a pump with a low capacity can be used, and as a result, the manufacturing cost of the gas-liquid contactor 1 can be reduced.

[0086] Second embodiment FIG. 6 is a schematic diagram showing the configuration of the gas-liquid contactor 10 according to the second embodiment. In the first embodiment, the packing material 22 arranged in each region of the gas-liquid contact section 2 includes a plurality of packing members whose overall shape is corrugated. In contrast, in this embodiment, the packing material 222, which replaces the packing material 22 in the first embodiment, includes a plurality of packing members whose partial shape is corrugated. As in the first embodiment, the gas-liquid contact section 2 includes four packing materials, that is, the first packing material 222a, the second packing material 222b, the third packing material 222c, and the fourth packing material 222d. In this embodiment, the shapes of these packing materials are the same as each other. Therefore, in the following description of the packing material 222, the third packing material 222c is taken up as a representative. In the gas-liquid contactor 10, the same components as those of the gas-liquid contactor 1 according to the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0087] Fig. 7 corresponds to a cross section VII-VII set in the third region 2c of the gas-liquid contact section 2 shown in Fig. 6, and is a cross-sectional view of the gas-liquid contactor 10 cut along the YZ plane. Fig. 8 is a perspective view of the third filler 222c including a partially exploded view.

[0088] The third filler 222c is configured by combining a plurality of filler members, similar to the third filler 22c in the first embodiment. Specifically, the third filler 222c has a plurality of first filler members 70 corresponding to the first filler members 50 in the first embodiment, and a plurality of second filler members 71 corresponding to the second filler members 51 in the first embodiment.

[0089] The first filling member 70 includes a first corrugated plate portion 70a on the upper side in the Z direction and a first flat plate portion 70b on the lower side in the Z direction. The first corrugated plate portion 70a and the first flat plate portion 70b are connected at their ends facing each other in the Z direction by welding, adhesive, or the like. Therefore, the first filling member 70 as a whole is regarded as one flat plate body.

[0090] The shape of the first corrugated plate portion 70a is defined in the same manner as the shape of the first filling member 50 in the first embodiment. The first corrugated plate portion 70a has a plurality of first peaks 70c protruding along the Y direction and a plurality of first valleys 70d protruding on the opposite side to the first peaks 70c. The extension direction of the first peaks 70c and the first valleys 70d is inclined by a first angle θ1 toward the negative side of the X direction with respect to the Z direction, as shown in FIG. 8. On the other hand, the first flat plate portion 70b is a flat plate whose main plane is parallel to the XZ plane. Since the first filling member 70 is also maintained in a position along the XZ plane in the third filling material 222c, the plate thickness of the first flat plate portion 70b is set to a degree that has sufficient strength to maintain the position.

[0091] The second filling member 71 includes a second corrugated plate portion 71a on the upper side in the Z direction and a second flat plate portion 71b on the lower side in the Z direction. The second corrugated plate portion 71a and the second flat plate portion 71b are connected at their ends facing each other in the Z direction by welding, adhesive, or the like. Therefore, the second filling member 71, like the first filling member 70, is regarded as a single flat plate body as a whole.

[0092] The shape of the second corrugated plate portion 71a is defined similarly to the shape of the second filling member 51 in the first embodiment. The second corrugated plate portion 71a has a plurality of second peaks 71c protruding along the Y direction and a plurality of second valleys 71d protruding on the opposite side to the second peaks 71c. The extension direction of the second peaks 71c and the second valleys 71d is inclined by a second angle θ2 toward the positive side of the X direction with respect to the Z direction, as shown in FIG. 8. On the other hand, the second flat plate portion 71b is a flat plate whose main plane is parallel to the XZ plane. The second filling member 71 is also maintained in a position along the XZ plane in the third filling material 222c, so the plate thickness of the second flat plate portion 71b is set to a degree that has sufficient strength to maintain the position.

[0093] In this embodiment, the overall dimensions of the first corrugated plate portion 70a and the second corrugated plate portion 71a are the same. In FIG. 7, the dimension in the Z direction of the first corrugated plate portion 70a and the second corrugated plate portion 71a is indicated as a first height H1. Also, the overall dimensions of the first flat plate portion 70b and the second flat plate portion 71b are the same. In FIG. 7, the dimension in the Z direction of the first flat plate portion 70b and the second flat plate portion 71b is indicated as a second height H2. In this case, the sum of the first height H2 and the second height H2 is the dimension in the Z direction of each of the first filling member 70 and the second filling member 71.

[0094] In the third filling material 222c, the first filling members 70 and the second filling members 71 are alternately stacked along the Y direction. However, in this embodiment, the first corrugated plate portion 70a of the first filling member 70 and the second corrugated plate portion 71a of the second filling member 71 are directly stacked. At this time, the first flat plate portion 70b and the second flat plate portion 71b are maintained parallel to each other at a constant interval, as shown in FIG. 7. In this embodiment, the third filling material 222c includes, for example, four first filling members 70 and four second filling members 71, and the general shape of the third filling material 22c is a rectangular parallelepiped.

[0095] Here, in the first embodiment, a liquid distributor 35 that sprays liquid L toward the filler 22 is provided for each liquid supply system 3. In contrast, the liquid supply system 3 in the present embodiment does not employ the liquid distributor 35. In the present embodiment, the combination of the first corrugated plate portion 70a and the second corrugated plate portion 71a included in each filler 222 serves as a substitute for the liquid distributor 35.

[0096] In this case, the liquid supply system 3 in this embodiment has a discharge pipe 135 that drips the liquid L toward the filler 222 above the filler 222 in the Z direction. Hereinafter, the discharge pipe 135 for the first region 2a will be referred to as the first discharge pipe 135a. Similarly, the discharge pipe 135 for the second region 2b will be referred to as the second discharge pipe 135b, the discharge pipe 135 for the third region 2c will be referred to as the third discharge pipe 135c, and the discharge pipe 135 for the fourth region 2d will be referred to as the fourth discharge pipe 135d. The discharge pipe 135 is connected to one end of the return pipe 36 in each liquid supply system 3. Although not shown, the discharge pipe 135 has a plurality of discharge holes formed therein that enable the liquid L to be discharged.

[0097] Next, the operation of the gas-liquid contactor 10 will be described.

[0098] In the gas-liquid contactor 10, the basic operations of the liquid supply system 3 and the gas supply system 4 are similar to those of the gas-liquid contactor 1 according to the first embodiment, but the action of each filler 222 differs from that of each filler 22 in the gas-liquid contactor 1.

[0099] First, in each region of the gas-liquid contact section 2, the liquid L is dripped from the discharge pipe 135 toward each filler 222. Since the discharge pipe 135 is, for example, a simple single pipe with a plurality of discharge holes formed therein, the dripped liquid L is not evenly distributed to each filler 222. However, the combination of the first corrugated plate portion 70a and the second corrugated plate portion 71a, which are located above each filler 222 in the Z direction and to which the liquid L dripped from the discharge pipe 135 directly reaches, has the same shape as the first filling member 50 and the second filling member 51 described in detail in the first embodiment. Therefore, the liquid L dripped from the discharge pipe 135 contacts either the first corrugated plate portion 70a or the second corrugated plate portion 71a before reaching the storage portion on the bottom plate 21b below the filler 222. Therefore, the liquid L that passes through the combined portion of the first corrugated plate portion 70a and the second corrugated plate portion 71a is widely dispersed toward the first flat plate portion 70b and the second flat plate portion 71b below, in the same manner as dispersion by the liquid distributor 35 in the first embodiment. Then, the liquid L dispersed toward the first flat plate portion 70b or the second flat plate portion 71b flows along the wall surface of the first flat plate portion 70b or the second flat plate portion 71b, forming a liquid film on each wall surface. Finally, the liquid L flows down toward the bottom plate 21b.

[0100] In this case, gas-liquid contact between the gas G and the liquid L occurs mainly in the first flat plate portion 70b or the second flat plate portion 71b in the packing material 222. Meanwhile, in the packing material 222, the combined portion of the first corrugated plate portion 70a and the second corrugated plate portion 71a acts as a substitute for the liquid distributor 35 in the first embodiment. Therefore, the first height H1 of the first corrugated plate portion 70a and the second corrugated plate portion 71a may be shorter than the second height H2 of the first flat plate portion 70b and the second flat plate portion 71b.

[0101] The combined portion of the first corrugated plate portion 70a and the second corrugated plate portion 71a in the packing material 222 may not only act as a substitute for the liquid distributor 35, but may also act as a portion that performs gas-liquid contact between the gas G and the liquid L, as in the first embodiment. In addition, in this embodiment, since the liquid distributor 35 is not used, more space can be secured in the gas-liquid contact portion 2. Therefore, the Z-direction dimensions of each of the first packing member 70 and the second packing member 71, which are expressed by the sum of the first height H2 and the second height H2, may be longer than the Z-direction dimensions of each of the first packing member 50 and the second packing member 51 in the first embodiment.

[0102] Thus, in the gas-liquid contactor 10, the first filling member 70 and the second filling member 71 may each have a first corrugated plate portion 70a, which is a corrugated plate, on the upper side in the Z direction, and a first flat plate portion 70b, etc., on the lower side in the Z direction.

[0103] According to such a gas-liquid contactor 10, the combined portion of the first corrugated plate portion 70a and the second corrugated plate portion 71a acts as a substitute for the liquid distributor 35 employed in the first embodiment, so there may be cases where the liquid distributor 35 is not required. Therefore, the manufacturing cost of the gas-liquid contactor 10 can be reduced compared to the case where the liquid distributor 35 is used.

[0104] The specific shapes of the container 21 shown in the gas-liquid contactor 1 according to each of the above embodiments and the circulation structure of the liquid L in the liquid supply system 3 are merely examples, and various modifications can be made provided that the basic structure of the gas-liquid contact section 2 is maintained.

[0105] Furthermore, the gas-liquid contact device 1 and the like according to each of the above-mentioned embodiments are not limited to devices for absorbing, separating, and removing specific components, but can also be applied to devices used in cooling, heating, stripping, and the like included in the processes of various chemical plants (cooling towers, heating towers, stripping towers (regeneration towers), etc.).

[0106] Although several embodiments have been described, the embodiments can be modified or modified based on the above disclosure. All components of the above embodiments and all features described in the claims may be individually extracted and combined as long as they are not mutually inconsistent. [Explanation of symbols]

[0107] 1 Gas-liquid contactor 2. Gas-liquid contact area 2a 1st area 2b 2nd area 2c 3rd area 2d 4th area 3 Liquid Supply System 4. Gas supply system 22a 1st filler 22b Second filler 22c 3rd filler 22d Fourth filling material 37a First pump 37b Second pump 37c 3rd pump 37d 4th pump 50 First filling member 51 Second filling member 70 First filling member 70a 1st corrugated plate section 70b 1st flat plate part 71 Second filling member 71a 2nd corrugated plate section 71b 2nd flat plate part 122a 1st filler 122b 2nd filler 122c 3rd filler 122d 4th filler 222a 1st filler 222b 2nd filler 222c 3rd filler 222d 4th filler G Gas L liquid

Claims

1. a gas-liquid contact section having a plurality of regions which are horizontally connected to each other and each of which is provided with a packing material; a liquid supply system that supplies the liquid to the filler from above in a vertical direction for each of the regions while sequentially circulating the liquid through the plurality of regions along an arrangement of the plurality of regions; a gas supply system that sequentially circulates gas through the plurality of regions along the arrangement of the plurality of regions to bring the gas into contact with the liquid for each of the regions; the filler includes first and second filler members each having a plate shape parallel to a supply direction of the liquid and a supply direction of the gas to the filler, the first and second filler members being alternately stacked on top of each other, At least a portion of the first filling member and the second filling member is a corrugated plate, The corrugation direction of the corrugated sheet of the first filling member and the corrugation direction of the corrugated sheet of the second filling member are inclined in opposite directions to each other with respect to the vertical direction, a gas-liquid contactor, wherein in adjacent regions, the corrugated plate constituting the packing in the region closer to the gas introduction position has a smaller corrugation pitch than the corrugated plate constituting the packing in the region farther from the gas introduction position.

2. The gas-liquid contactor according to claim 1 , wherein the first packing member and the second packing member are entirely made of the corrugated plate.

3. 2. The gas-liquid contactor according to claim 1, wherein each of the first packing member and the second packing member has a corrugated plate portion that is the corrugated plate on an upper side in the vertical direction and a flat plate portion on a lower side in the vertical direction.

4. the liquid supply system includes a pump for supplying the liquid temporarily stored below the filler in a vertical direction to an upper portion of the filler in each of the plurality of regions; The gas-liquid contactor according to claim 1 , wherein the pump has a different capacity for each of the plurality of regions in accordance with the difference in the pitch of the corrugated plate.

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