Abstract:
A gas-liquid contactor includes: a plurality of packing material sections through which exhaust gas passes; and a plurality of liquid distributors provided upon each of the plurality of packing material sections, dispersing a CO 2  absorption liquid caused to come in contact with the exhaust gas, and supplying the CO 2  absorption liquid to tile plurality of packing material sections. The plurality of packing material sections include a first packing material layer and a second packing material layer that have provided therein flow paths ( 111   a,    112   a ) for the CO 2  absorption fluid that each extend in prescribed directions (D 2 , D 3 ). The first packing material layer and the second packing material layer are characterized by being laminated such that the directions (D 2 , D 3 ) of extension of the flow paths ( 111   a,    112   a ) in the flow direction (D 1 ) for the exhaust gas are different from each other.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a gas-liquid contactor, and a CO 2  recovery device that perform absorption and distillation by gas-liquid contact using a treatment liquid, and particularly to a gas-liquid contactor and a CO 2  recovery device, using a packing material. 
       BACKGROUND ART 
       [0002]    In the related art, gas-liquid contactors, which bring a CO 2  absorption liquid into contact with CO 2  contained in an exhaust gas exhausted from a boiler of a thermoelectric power plant, thereby reducing CO 2  contained in the exhaust gas, are suggested (for example, refer to PTL 1). In the gas-liquid contactors, the recovery rate of CO 2  contained in the exhaust gas is improved by spraying the CO 2  absorption liquid from above the packing material that fills the inside of the device, thereby improving the contact area between the CO 2  absorption liquid flowing down along the surface of the packing material and the exhaust gas flowing through the packing material. 
       CITATION LIST 
     Patent Literature 
       [0003]    [PTL 1] Japanese Unexamined Patent Application Publication No. 6-269629 
       SUMMARY OF INVENTION 
     Technical Problem 
       [0004]    Meanwhile, in the related-art gas-liquid contactors, gas-liquid maldistribution within the gas-liquid contactors may become large with an increase in size of the devices, the absorption performance of CO 2  may degrade, and sufficient absorption performance of CO 2  may not be obtained merely by filling the insides of the gas-liquid contactors with the packing material. 
         [0005]    The invention has been made in view of such actual circumstances, and an object thereof is to provide a gas-liquid contactor and a CO 2  recovery device capable of reducing gas-liquid maldistribution inside a device to prevent reduction in gas absorption performance even if the overall device has increased in size. 
       Solution to Problem 
       [0006]    A gas-liquid contactor of the invention includes a plurality of packing material sections through which a gas to be treated passes; and a plurality of liquid distributors that are respectively provided on the plurality of packing material sections, disperse a liquid brought into contact with the gas to be treated, and supply the liquid to the plurality of packing material sections. The plurality of packing material sections include a first packing material layer and a second packing material layer that have flowpaths for the fluid provided to extend in predetermined directions, respectively, and the first packing material layer and the second packing material layer are laminated such that the extending directions of the flowpaths in a flow direction of the gas to be treated are different from each other. 
         [0007]    According to this gas-liquid contactor, the liquid dispersed by the liquid distributors that are respectively provided in the plurality of packing material sections is supplied. Thus, liquid maldistribution in the liquid distributors can foe prevented even in a case where the overall device has increased in size. Additionally, in the gas-liquid contactor, the first packing material layer and the second packing material layer are laminated such that the extending directions, of the flowpaths for the liquid dispersed by the liquid distributors are different from each other. Thus, gas-liquid, maldistribution within the plurality of packing material sections can be prevented. Moreover, since the plurality of packing material sections are provided within the gas-liquid contactor, an increase in gas-liquid maldistribution to the packing material sections adjacent to each other can be prevented. Therefore, in the gas-liquid contactor, it is possible to realize the gas-liquid contactor that can reduce gas-liquid maldistribution within the device to prevent degradation in gas absorption performance, in a case where the overall device has increased in size. 
         [0008]    In the gas-liquid contactor according of the invention, it is preferable that the first packing material layer and the second packing material layer are laminated such that the extending directions of the flowpaths are substantially orthogonal to each other. By virtue of this configuration, in the gas-liquid contactor, the dispersibility of the liquid within the first packing material layer and the second packing material layer is improved. Thus, gas-liquid maldistribution within the plurality of packing material sections can be prevented. 
         [0009]    In the gas-liquid contactor according of the invention, it is preferable that the first packing material layer and the second packing material layer are provided such that the flowpaths are oblique with respect to the flow direction of the gas to be treated. By virtue of this configuration, in the gas-liquid contactor, the residence time of the liquid within the first packing material layer and the second packing material layer becomes long, and the dispersibility of the liquid is improved. Thus, gas-liquid maldistribution within the plurality of packing material layers can be prevented further. 
         [0010]    In the gas-liquid contactor of the invention, it is preferable that the first packing material layer and the second packing material layer are plate-like packing materials. By virtue of this configuration, in the gas-liquid contactor, the dispersibility of the liquid within the first packing material layer and the second packing material layer is improved. Thus, gas-liquid maldistribution within the plurality of packing material sections can be prevented. 
         [0011]    In the gas-liquid contactor of the invention, it is preferable that the shape of the plate-like packing materials is a corrugated plate-like shape or a flat plate-like shape. By virtue of this configuration, in the gas-liquid contactor, the dispersibility of the liquid within the first packing material layer and the second packing material layer is improved. Thus, gas-liquid maldistribution within the plurality of packing material layers can be prevented. 
         [0012]    In the gas-liquid contactor of the invention, it is preferable to further include a partitioning member that is provided between the plurality of packing material sections and partitions off the plurality of packing material sections from each other. By virtue of this configuration, in the gas-liquid contactor, the plurality of packing material sections are divided by the partitioning members. Thus, an increase in gas-liquid maldistribution to the packing material layers adjacent to each other can be prevented further. 
         [0013]    A CO 2  recovery device of the invention includes the above gas-liquid contactor; a CO 2  absorption tower that brings an exhaust gas including CO 2  into contact with a CO 2  absorption liquid absorbing CO 2 , and removes CO 2  from the exhaust gas; and a regeneration tower that releases CO 2  from the CO 2  absorption liquid that has absorbed CO 2 , and regenerates the CO 2  absorption liquid. 
         [0014]    According to this CO 2  recovery device, the CO 2  absorption liquid, which is dispersed by the liquid distributors that are respectively provided in the plurality of packing material sections, is supplied. Thus, liquid maldistribution of the CO 2  absorption liquid in the liquid distributors can be prevented even in a case where the overall device has increased in size. Additionally, in the CO 2  recovery device, the first packing material layer and the second packing material layer are laminated such that the extending directions of the flowpaths for the CO 2  absorption liquid dispersed by the liquid distributors are different from each other. Thus, gas-liquid maldistribution within the plurality of packing material sections can be prevented. Moreover, since the plurality of packing material sections are provided within the CO 2  recovery device, an increase in gas-liquid maldistribution to the packing material sections adjacent to each other can be prevented. Therefore, in the CO 2  recovery device, it is possible to realize the CO 2  recovery device that can reduce gas-liquid maldistribution within the device and can prevent degradation in gas absorption performance, in a case where the overall device has increased in size. 
       Advantageous Effects of Invention 
       [0015]    According to the invention, it is possible to realize the gas-liquid contactor and the CO 2  recovery device capable of reducing gas-liquid maldistribution inside the device to prevent reduction in gas absorption performance even if the overall device has increased in size. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0016]      FIG. 1  is a schematic view of a CO 2  recovery device including a gas-liquid contactor related to a first embodiment. 
           [0017]      FIG. 2  is a schematic perspective view of the internal structure of the gas-liquid contactor related to the first embodiment. 
           [0018]      FIG. 3  is a schematic perspective view of units in the gas-liquid contactor related to the first embodiment. 
           [0019]      FIG. 4  is a schematic perspective view of units in a gas-liquid contactor related to a second embodiment. 
           [0020]      FIG. 5  is a schematic perspective view of units in a gas-liquid contactor related to a third embodiment. 
           [0021]      FIG. 6  is a schematic perspective view of a gas-liquid contactor related to a fourth embodiment. 
           [0022]      FIG. 7  is a view illustrating results of Example and Comparative Example. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0023]    Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings. In addition, although an example in which the invention is applied to a CO 2  recovery device will be described below, the invention is applicable to various gas-liquid contactors other than the CO 2  recovery device. Additionally, in the invention, the configurations of CO 2  recovery devices related to the following respective embodiments can be appropriately combined and implemented. In addition, the invention is not limited to the following embodiments, can be appropriately changed and implemented. 
       First Embodiment 
       [0024]      FIG. 1  is a schematic view of a CO 2  recovery device including a gas-liquid contactor related to a first embodiment of the invention. As illustrated in  FIG. 1 , the CO 2  recovery device  10  is a device that recovers CO 2  in an exhaust gas  11  containing CO 2  exhausted from industrial facilities, such as a boiler and a gas turbine and exhausts a high-concentration CO 2  gas  55 . The CO 2  recovery device  10  includes a cooling tower  13  into which the exhaust gas  11  containing CO 2  is introduced, a CO 2  absorption tower  15  that is provided in a subsequent stage of the cooling tower  13 , and a regeneration tower  17  that is provided in a subsequent stage of the CO 2  absorption tower  15 . 
         [0025]    The cooling tower  13  cools the exhaust gas  11  containing CO 2  with water  12 . The CO 2  absorption tower  15  brings the exhaust gas  11  cooled in the cooling tower  13  into contact with a CO 2  absorption liquid  14  that absorbs CO 2 , and removes CO 2  from the exhaust gas  11 . The regeneration tower  17  heats the CO 2  absorption liquid (rich solution)  16  that has absorbed CO 2  in the CO 2  absorption tower  15 , releases CO 2  from the CO 2  absorption liquid  16 , and regenerates the CO 2  absorption liquid  14 . 
         [0026]    In the CO 2  recovery device  10 , the CO 2  absorption liquid  14  circulates between the CO 2  absorption tower  15  and the regeneration towers  17 . The CO 2  absorption liquid  14  (lean solution) is supplied to the regeneration tower  17  as the CO 2  absorption liquid (rich solution)  16  that has absorbed CO 2  in the CO 2  absorption tower  15 . Additionally, the CO 2  absorption liquid (rich solution)  16  is supplied to the CO 2  absorption tower  15  as the CO 2  absorption liquid (lean solution)  14  from which almost all CO 2  has been removed, and regenerated in the regeneration tower  17 . 
         [0027]    The exhaust gas  11  containing CO 2  is sent to the cooling tower  13  after the pressure thereof is raised by an exhaust-gas blower or the like, and is cooled by coming into countercurrent contact with the water  12  within the cooling tower  13 . The water  12  that performs heat exchange with the exhaust gas  11  and has a high temperature is cooled by cooling water  18  and is circulated and used as cooling water for the exhaust gas  11 , after being extracted from a bottom part of the cooling tower  13 . The cooled exhaust gas  11  is exhausted to a flue  19  that is provided between the cooling tower  13  and the CO 2  absorption tower  15 . The exhaust gas  11  exhausted from the cooling tower  13  is sent from a supply port  20  provided in a side wall of a tower bottom part of the CO 2  absorption tower  15  via the flue  19  to the CO 2  absorption tower  15 . 
         [0028]    The CO 2  absorption tower  15  has a gas-liquid contactor  100 , which brings the CO 2  absorption liquid  14  (for example, a basic amine compound) and the exhaust gas  11  into countercurrent contact with each other, provided on a lower side thereof. The interior of the gas-liquid contactor  100  is filled with a packing material section  110  (not illustrated in  FIG. 1 , refer to  FIG. 2 ), and an upper part of the packing material section  110  is provided with a liquid distributor  120  (not illustrated in  FIG. 1 , refer to  FIG. 2  and the like) to which the CO 2  absorption liquid  14  is supplied. In the CO 2  absorption tower  15 , when the exhaust gas  11  passes to rises from the lower side of the CO 2  absorption tower  15 , the CO 2  absorption liquid  14  is supplied from an upper part, and the rising exhaust gas  11  and the CO 2  absorption liquid  14  are brought into contact with each other. This enables the CO 2  absorption liquid  14  to absorb to CO 2  in the exhaust gas  11 . 
         [0029]    Additionally, the CO 2  absorption tower  15  has a washing section  42  and a demister  43  on an upper side of the gas-liquid contactor  100 . A CO 2 -removed exhaust gas  41  from which CO 2  has been removed is released out of the system from a tower top part after the CO 2  absorption liquid  14  entrained in the CO 2 -removed exhaust gas  41  is removed in the washing section  42  and the demister  43 . In the gas-liquid contactor  100 , a rich solution  16  that has absorbed CO 2  in the exhaust gas  11  is stored in a bottom part of the CO 2  absorption tower  15 . The rich solution  16  stored in the bottom part of the CO 2  absorption tower  15  is pumped by a rich solution discharge pump  44  provided outside from the tower bottom part of the CO 2  absorption tower  15 . The rich solution  16  is supplied into, the regeneration tower  17  from its tower top part after heat exchange is performed with the CO 2  absorption liquid  14 , which has been regenerated in the regeneration tower  17 , in a rich/lean solution heat exchanger  45 . 
         [0030]    The regeneration tower  17  releases CO 2  from the rich solution  16  to regenerate the rich solution as a lean solution  14 . The rich solution  16  released into the regeneration tower  17  from the tower top part has most of CO 2  released therefrom by absorption of heat, and becomes a CO 2  absorption liquid (lean solution)  14  from which most of CO 2  has been removed in a tower bottom part of the regeneration tower  17 . The lean solution  14  stored in the bottom part of the regeneration tower  17  is supplied to the CO 2  absorption tower  15  as a CO 2  absorption liquid after being supplied by a lean solvent pump  46  and being heat-exchanged with and cooled by the cooling water  48  by a lean solvent cooler  47 . Meanwhile, a CO 2  gas  51  that has entrained steam is released from the tower top part of the regeneration tower  17 . The CO 2  gas  51  that has entrained steam is delivered from the tower top part of the regeneration tower  17 , the steam contained in the CO 2  gas  51  is condensed with. cooling water  53  by a condenser  52 , water.  56  is separated by a separation drum  54 , and then, a CO 2  gas  55  is released out of the system and is recovered. Additionally, the water  56  separated by the separation drum  54  is supplied to the upper part, of the regeneration tower  17  by a condensed water circulation pump  57 . 
         [0031]    Next, the internal structure of the gas-liquid contactor  100  related to the present embodiment will be described in detail.  FIG. 2  is a schematic perspective view of the internal structure of the gas-liquid contactor  100  related to the present embodiment. 
         [0032]    As illustrated in  FIG. 2 , a plurality of (eight in the present embodiment) units  101  each having the packing material section  110  through which the exhaust gas  11  passes, and the liquid distributor  120  provided on the packing material section  110  are arranged side by side inside the gas-liquid contactor  100  related to the present embodiment. The packing material section  110  has a substantially rectangular parallelepiped shape, and has a first packing material layer  111 , a second packing material layer  112 , and a third packing material layer  113  laminated in this order, respectively, such that these packing material layers come into contact, with each other in a flow direction of the exhaust gas  11 . 
         [0033]    The liquid distributor  120  is arranged above the third packing material layer  113  so as to be located on the subsequent stage side of the exhaust gas  11  in a flow direction D 1  with respect to the packing material section  110 . The liquid distributor  120  has a substantially rectangular parallelepiped shape, and includes a liquid distributor body  121  that has a flowpath  121   a  (not illustrated in  FIG. 2 , refer to  FIG. 3 ) for the CO 2  absorption liquid  14  provided in the surface thereof, and a liquid supply section  122  for the CO 2  absorption liquid  14  provided in an upper surface of the liquid distributor body  121 . In this way, in the present embodiment, a single packing material section  110  and a single liquid distributor  120  do not constitute a gas-liquid contactor, but a plurality of the units  101  each having a plurality of the packing material sections  110  and a plurality of the liquid distributors  120  are provided side by side. Accordingly, the gas-liquid contactor  100  can prevent the liquid maldistribution of the CO 2  absorption liquid  14  in the liquid distributor  120  and can prevent an increase in gas-liquid maldistribution to the packing material sections  110  of the units  101  adjacent to each other, even in a case where the overall device has increased in size. 
         [0034]      FIG. 3  is a schematic perspective view of a unit  101  in the gas-liquid contactor  100  related to the present embodiment. In addition, for convenience of description,  FIG. 3  illustrates that the first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  are spaced apart from each other. As illustrated in  FIG. 3 , the liquid supply section  122  of the liquid distributor  120  has a substantially rectangular parallelepiped shape, and is provided at a central part of the liquid distributor  120 . The liquid supply section  122  is open at its upper end, and is configured so as to be capable of supplying the CO 2  absorption liquid  14  thereinto from above. A bottom surface of the liquid supply section  122  is provided with a plurality of liquid supply ports  122   a.    
         [0035]    The liquid distributor body  121  has a substantially rectangular parallelepiped shape, and a plurality of the flowpaths  121   a  for the CO 2  absorption liquid  14  are provided substantially parallel to a direction substantially orthogonal to the flow direction D 1  of the exhaust gas  11 . By adopting such a configuration, the CO 2  absorption liquid  14  supplied into the liquid supply section  122  is dispersed via the flowpaths  121   a  of the liquid distributor body  121  from the liquid supply ports  122   a , and is dispersed and supplied from a lower surface side of the liquid distributor  120  to the packing material section  110  arranged below the liquid distributor  120 . 
         [0036]    The first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  of the packing material section  110  are respectively constituted as substantially rectangular parallelepiped plate-like members. The first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  are respectively configured such that a plurality of flat plate-like members are laminated, and flowpaths  111   a ,  112   a,  and  113   a  for the CO 2  absorption liquid  14  are provided in gaps between the respective plate-like members. The first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  are respectively provided with the flowpaths  111   a  to  113   a  through which the CO 2  absorption liquid  14  flows. By virtue of such a configuration, in the gas-liquid contactor  100 , the dispersibility of the CO 2  absorption liquid  14  within the first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  improves. Thus, gas-liquid maldistribution within the plurality of packing material sections  110  can be prevented. 
         [0037]    The first packing material layer  111  and the second packing material layer  112  are laminated such that an extending direction D 2  of the flowpaths  111   a  of the first packing material layer  111  and an extending direction D 3  of the flowpaths  112   a  of the second packing material layer  112  become mutually different directions. Additionally, the second packing material layer  112  and the third packing material layer  113  are arranged such that the extending direction D 3  of the flowpaths  112   a  of the second packing material layer  112  and the extending direction D 2  of the flowpaths  113   a  of the third packing material layer  113  become different directions, respectively. In the present embodiment, the first packing material layer  111  and the second packing material layer  112  are laminated such that the extending direction D 2  of the flowpaths  111   a  of the first packing material layer  111  and the extending direction D 3  of the flowpaths  112   a  of the second packing material layer  112  are substantially orthogonal to each other. Additionally, the second packing material layer  112  and the third packing material layer  113  are arranged such that the extending direction D 3  of the flowpaths  112   a  of the second packing material layer  112  and the extending direction D 2  of the flowpaths  113   a  of the third packing material layer  113  are Substantially orthogonal to each other. That is, the first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  are arranged such that the extending directions D 2  of the flowpaths  111   a  and  113   a  of the first packing material layer  111  and the third packing material layer  113  substantially coincide with each other. The extending direction D 3  of the flowpaths of the second packing material layer  112  arranged between the first packing material layer  111  and the third packing material layer  113  is arranged so as to be substantially orthogonal to the extending directions D 2  of the flowpaths  111   a  and  113   a  of the first packing material layer  111  and the third packing material layer  113 . 
         [0038]    By configuring the packing material sections  110  in this way, the CO 2  absorption liquid  14  that has been dispersed by the liquid distributor  120  and has flowed down to the third packing material layer  113  is dispersed in the extending direction D 2  by the flowpaths  113   a  of the third packing material layer  113  and flows down to the second packing material layer  112 . The CO 2  absorption liquid  14  that has flowed down to the second packing material layer  112  is dispersed in the extending direction D 3  of the flowpaths  112   a  of the second packing material layer  112 , and flows down to the first packing material layer  111 . Then, the CO 2  absorption liquid  14  that has flowed down to the first packing material layer  111  is dispersed in the extending direction D 2  of the flowpaths  111   a  of the first packing material layer  111 , becomes the rich solution  16 , and is stored in the lower part of the CO 2  absorption tower  15 . Accordingly, since the CO 2  absorption liquid  14  flows down through the packing material sections  110  while being dispersed in mutually different directions, liquid maldistribution in the liquid distributor can be prevented even in a case where the overall device has increased in size. 
         [0039]    As described above, according to the present embodiment, the CO 2  absorption liquid  14  dispersed by the liquid distributors  120  that are respectively provided in the plurality of packing material sections  110  is supplied. Thus, liquid maldistribution in the liquid distributors  120  can be prevented even in a case where the overall device has increased in size. Additionally, since the first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  are laminated such that the extending directions D 2  and D 3  of the flowpaths  111   a  to  113   a  for the CO 2  absorption liquid  14  dispersed by the liquid distributors  120  are different from each other, gas-liquid maldistribution within the plurality of packing material sections  110  can be prevented. Moreover, since the plurality of packing material sections  110  are provided within the device, an increase in gas-liquid maldistribution to the packing material sections  110  adjacent to each other can be prevented. Therefore, in the gas-liquid contactor  100 , it is possible to realize the gas-liquid contactor  100  that can reduce gas-liquid maldistribution within the device to prevent degradation in gas absorption performance, in a case where the overall device has increased in size. 
         [0040]    Additionally, according to the above embodiment, the extending directions D 2  and D 3  of the flowpaths  111   a  to  113   a  are laminated so as to be substantially orthogonal to each other. Thus, the dispersibility of a liquid within the first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  can be improved, and gas-liquid maldistribution within the plurality of packing material sections  110  can be prevented further. 
         [0041]    In addition, an example in which three layers including the first packing material layer  111 , the second packing material layer  112 , and the third packing material layer  113  are laminated to constitute the packing material section  110  has been described in the above embodiment. However, the invention is not limited to this configuration. It is sufficient if the packing material section  110  is configured such that at least two layers are laminated. 
         [0042]    Additionally, an example in which the CO 2  absorption liquid  14  is dispersed using a so-called trough type liquid distributor  120  has been described in the above embodiment. However, the invention is not limited to this configuration. If the liquid distributor  120  can disperse the CO 2  absorption liquid  14  to supply the CO 2  absorption liquid  14  to the packing material section  110 , the liquid distributor is not limited particularly. 
         [0043]    Additionally, although a case where the gas-liquid contactor  100  related to the present embodiment is used for the CO 2  absorption tower  15  of the CO 2  recovery device  10  has been described, the present embodiment is not limited to this, and may be used for the cooling tower  13  or the like. 
       Second Embodiment 
       [0044]    Next, a second embodiment of the invention will be described. In addition, constituent elements common to those of the gas-liquid contactor  100  related to the above-described first embodiment will be designated by the same reference signs, and duplicate description thereof will be avoided. 
         [0045]      FIG. 4  is a schematic perspective view of a unit  201  in the gas-liquid contactor  100  related to the present embodiment. In addition, for convenience of description,  FIG. 4  illustrates that a first packing material layer  211 , a second packing material layer  212 , and a third packing material layer  213  are spaced apart from each other. As illustrated in  FIG. 4 , in the present embodiment, a packing material section  210  is arranged below the liquid distributor  120 . The packing material section  210  is configured such that the first packing material layer  211 , the second packing material layer  212 , and the third packing material layer  213  are laminated. The first packing material layer  211 , the second packing material layer  212 , and the third packing material layer  213  of the packing material section  210  are respectively constituted as substantially rectangular parallelepiped plate-like members. The first packing material layer  211 , the second packing material layer  212 , and the third packing material layer  213  are respectively configured such that a plurality of plate-like members are laminated obliquely, and flowpaths  211   a,    212   a,  and  213   a  for the CO 2  absorption liquid  14  are provided between the respective plate-like members. That is, in the present embodiment, the flowpaths  211   a,    212   a,  and  213   a  for the CO 2  absorption liquid  14  are obliquely provided with respect to the flow direction D 1  of the exhaust gas  11 . Since the other configuration is the same configuration as the gas-liquid contactor  100  related to the above-described first embodiment, the description thereof will be omitted. 
         [0046]    According to the present embodiment, the residence time of the CO 2  absorption liquid  14  within the packing material section  210  becomes long. Thus, the dispersibility of the CO 2  absorption liquid  14  can be improved, and gas-liquid maldistribution within the packing material section  210  can be prevented further. 
       Third Embodiment 
       [0047]      FIG. 5  is a schematic perspective view of a unit  301  in the gas-liquid contactor  100  related to a third embodiment of the invention. In addition, for convenience of description.  FIG. 5  illustrates that a first packing material layer  311 , a second packing material layer  312 , and a third packing material layer  313  are spaced apart, from each other. As illustrated in  FIG. 5 , in the present embodiment, a packing material section  310  is arranged below the liquid distributor  120 . The packing material section  310  is configured such that the first packing material layer  311 , the second packing material layer  312 , and the third packing material layer  313  are laminated. The first packing material layer  311 , the second packing material layer  312 , and the third packing material layer  313  of the packing material section  310  are respectively constituted as substantially rectangular parallelepiped plate-like members. The first packing material layer  311 , the second packing material layer  312 , and the third packing material layer  313  are respectively configured such that a plurality of corrugated plate-like members are laminated obliquely, and flowpaths  311   a,    312   a,  and  313   a  for the CO 2  absorption liquid  14  are provided between the respective plate-like members. That is, in the present embodiment, the flowpaths  311   a,    312   a,  and  313   a  for the CO 2  absorption liquid  14  are provided in a wave fashion with respect to the extending directions D 2  and D 3  of the flowpaths  311   a,    312   a,  and  313   a  of the exhaust gas  11 . Since the other configuration is the same configuration as the gas-liquid contactor  100  related to the above-described first embodiment, the description thereof will be omitted. 
         [0048]    According to the present embodiment, the residence time of the CO 2  absorption liquid  14  within the packing material section  310  becomes long. Thus, the dispersibility of the CO 2  absorption liquid  14  can be improved, and gas-liquid maldistribution within the packing material section  310  can be prevented further. 
       Fourth Embodiment 
       [0049]      FIG. 6  is a schematic perspective view of a gas-liquid contactor  400  related to a fourth embodiment of the invention. As illustrated in  FIG. 6 , a plurality of (eight in the present embodiment) units  101  each having the packing material section  110  through which the exhaust gas  11  passes, and the liquid distributor  120  provided on the packing material section  110  are arranged side by side inside the gas-liquid contactor  400  related to the present embodiment. Partitioning members  401  that partition off the respective units  101  from each other are provided between the respective units  101 . Since the other configuration is the same configuration as the gas-liquid contactor  100  related to the above-described first embodiment, the description thereof will be omitted. 
         [0050]    According to the present embodiment, the plurality of packing material sections  110  are divided by the partitioning members  401 . Thus, an increase in gas-liquid maldistribution to the packing material layers adjacent to each other can be prevented further. In addition, in the example illustrated in  FIG. 6 , an example in which flat plate-like partitioning members  401  are arranged has been described. However, the shape of the partitioning members  401  are not necessarily a flat plate shape if the partitioning members can partition off the respective units  101  from each other. 
       Examples 
       [0051]    Next, examples that are implemented in order to clarify the effects of the invention will, be described. The present inventors evaluated CO 2  absorption rate ratios on the basis of a related-art gas-liquid contactor (Comparative Example) about the gas-liquid contactor  100  (Example 1) related to the above-described first embodiment and the gas-liquid contactor  400  (Example 2) related to the fourth embodiment. The results are shown in  FIG. 7 . As illustrated in  FIG. 7 , the gas-liquid contactor  100  related to the above first embodiment in which the plurality of units  101  each including the packing material, section  110  and the liquid distributor  120  are provided shows a CO 2  absorption rate ratio of about 1.04 times greater than that of the related-art gas-liquid contactor. It is considered that this result is obtained because increases in liquid maldistribution in the liquid distributor  120 , gas-liquid maldistribution within the plurality of packing material sections  110 , and gas-liquid maldistribution to the packing material sections  110  adjacent to each other can be prevented. Additionally, the gas-liquid contactor  400  related to the above fourth embodiment in which the partitioning members  401  are arranged between the plurality of units  101  show a CO 2  absorption rate ratio of about 1.05 times greater than that of the related-art gas-liquid contactor. It is considered that this result is obtained because the plurality of packing material sections  110  are divided by the partitioning members  401 , and thus, an increase in gas-liquid maldistribution to the packing material sections  110  adjacent to each other can be prevented further. 
       REFERENCE SIGNS LIST 
       [0052]      10 : CO 2  RECOVERY DEVICE 
         [0053]      11 : EXHAUST GAS 
         [0054]      12 ,  56 : WATER 
         [0055]      13 : COOLING TOWER 
         [0056]      14 : CO 2  ABSORPTION LIQUID 
         [0057]      15 : CO 2  ABSORPTION TOWER 
         [0058]      16 : RICH SOLUTION 
         [0059]      17 : REGENERATION TOWER 
         [0060]      18 ,  48 ,  53 : COOLING WATER 
         [0061]      19 : FLUE 
         [0062]      20 : SUPPLY PORT 
         [0063]      41 : CO 2 -REMOVED EXHAUST GAS 
         [0064]      42 : WASHING SECTION 
         [0065]      43 : DEMISTER 
         [0066]      44 : RICH SOLUTION DISCHARGE PUMP 
         [0067]      45 : RICH/LEAN SOLUTION HEAT EXCHANGER 
         [0068]      46 : LEAN SOLVENT POMP 
         [0069]      47 : LEAN SOLVENT COOLER 
         [0070]      51 ,  55 : CO 2  GAS 
         [0071]      52 : CONDENSER 
         [0072]      54 : SEPARATION DRUM 
         [0073]      57 : CONDENSED WATER CIRCULATION POMP 
         [0074]      100 ,  400 : GAS-LIQUID CONTACTOR 
         [0075]      101 ,  201 ,  301 : UNIT 
         [0076]      110 ,  210 ,  310 : PACKING MATERIAL SECTION 
         [0077]      111 ,  211 ,  311 : FIRST PACKING MATERIAL LAYER 
         [0078]      111   a ,  211   a ,  311   a : FLOWPATH 
         [0079]      112 ,  212 ,  312 : SECOND PACKING MATERIAL LAYER 
         [0080]      112   a ,  212   a ,  312   a : FLOWPATH 
         [0081]      113 ,  213 ,  313 : THIRD PACKING MATERIAL LAYER 
         [0082]      113   a ,  213   a ,  313   a : FLOWPATH 
         [0083]      120 : LIQUID DISTRIBUTOR 
         [0084]      121 : LIQUID DISTRIBUTOR BODY 
         [0085]      121   a : FLOWPATH 
         [0086]      122 : LIQUID SUPPLY SECTION 
         [0087]      122   a : LIQUID SUPPLY PORT 
         [0088]      401 : PARTITION