JPH10118484A - Liquid collecting device for material and/or heat exchanging tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress generation of a turbulence in a trough part and to drain liquid smoothly by constructing a liquid collecting device for collecting the liquid flowing down from above in a contact tower, of liquid collecting troughs arranged in parallel, and arranging a barrier member which extends laterally on the surface of a lateral plate on the side where the height of each of the liquid collecting troughs is larger. SOLUTION: In a liquid collecting device constructed of plural liquid collecting troughs held in an exchange tower 50, a shelf member which extends in the internal circumferential direction is provided on the inner wall of the exchange tower 50 and the end part of each of the liquid collecting troughs is deposited on the shelf member. Each of the liquid collecting troughs 2 is formed in such a way the liquid collecting trough 21 positioned in the center is symmetrical with a right and a left lateral plate 24 of almost the same height and the other liquid collecting troughs 22 are asymmetrical at the right and the left with a lateral plate 24, to the center, of small height an a lateral plate 23, of large height. Further, a barrier member 25 extending crosswise is disposed on the surface of a lateral plate 2. A liquid flowing down on the lateral plate 24 is once collected by the barrier member 25 and part of the liquid flows down from the open part of the lateral plate 24 and the other part drains down to the trough part. Thus the turbulence of the liquid in the trough part is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a liquid collecting apparatus used in a substance and / or heat exchange tower. Such a liquid collecting device is generally installed in the middle of a structure filled in the inside of a contact tower, a so-called filler, and once collects a liquid flowing down from above, and further includes a filler positioned thereunder. Is used to supply the liquid again.

[0002]

2. Description of the Related Art In a material and / or heat exchange column, a packing material is packed in the column,
The liquid to be treated is allowed to uniformly flow down from the top of the column onto the packing material, while the gas is raised from the bottom of the column, thereby achieving uniform and efficient contact between the liquid and the gas. However, as the liquid to be treated flows down the column through the packing material, the distribution of the liquid flow is biased due to the influence of the gas flow from below, so that the liquid is uniformly distributed at the bottom of the column. However, a phenomenon occurs in which the gas-liquid contact efficiency is deteriorated. Therefore, in order to avoid such a phenomenon, in the material and / or heat exchange tower,
A device for temporarily collecting the liquid flowing down from the upper packing material at the interruption portion of the column filled with the packing material and distributing it once again uniformly throughout the lower packing material, a so-called liquid It is common to arrange a redistributor. Such a liquid redistributor generally includes a liquid collecting device and a liquid redistribution device.

FIG. 1 shows an example of a liquid collecting apparatus used in this technology. FIG. 1a is a perspective view of an example of a liquid collecting device used in the art, and FIG. 1b is a cross-sectional view as viewed from the direction of the arrow in FIG. 1a. The liquid collecting device shown in FIG. 1 includes a trough-shaped liquid storage member 1 extending substantially horizontally along the diameter of the exchange tower 50, and a trough-shaped liquid storage member 1 disposed above the trough and substantially horizontally extending in a direction intersecting the trough. And a plurality of elongating liquid collecting gutters 2. Each collecting trough has a shorter length as it is located on the outer side. When the collecting device is viewed from above, the overall shape and size of the collecting device are the cross-sectional shape of the tower (usually circular) and the tower. And the entire cross section of the tower is covered by the surface of the collecting trough. Further, in the general liquid collecting apparatus of the embodiment shown in FIG. 1, in each liquid collecting gutter, the liquid collecting gutter located at the center is a symmetrical shape in which the left and right side plates are almost the same height,
The other collecting troughs are asymmetrical with the height of the left and right side plates being different, so that the height of the side plate on the side close to the symmetrical collecting trough is small and the height of the side plate on the separating side is large. Are arranged. A liquid stopping member 4 is arranged at an end of each collecting gutter so that liquid collected in the collecting gutter does not flow down from the end of the gutter. The central part of each collecting trough, that is, the liquid storage member 1
The hole 3 is provided in a portion located just above the hole 3. When such a liquid collecting device is disposed in the middle part of the tower, the liquid falling from the upper filler is collected by the side plate of each liquid collecting gutter 2 and is temporarily stored in the liquid collecting gutter. It falls from the hole 3 formed in the central part of the gutter, and is stored in the trough-shaped liquid storage member 1 disposed immediately below. The liquid accommodating member 1 usually has a vertical pipe 101 extending in a vertical direction, a main pipe 102 connected to the vertical pipe and extending in a horizontal direction, and a main pipe 102 connected to the main pipe and intersecting with the main pipe, as shown in FIG. 3, for example. The liquid to be treated collected in the liquid storage member 1 is connected to a vertical pipe 10 of the liquid distributor which is connected to a vertical pipe of a liquid distributor constituted by a plurality of distribution pipes 103 extending in the direction.
1. Via the main pipe 102 and the distribution pipe 103, the liquid is uniformly redistributed and flows down from the hole 104 formed in the distribution pipe of the liquid distributor onto the lower filler. This makes it possible to redistribute the liquid stream which has been deflected in the packing material evenly again over the entire cross section of the column, thereby improving the gas-liquid contact efficiency.

[0004] In such a liquid collecting apparatus of the type in which left and right asymmetric liquid collecting gutters are arranged and arranged, a side plate having a small height inside the center of the central liquid collecting gutter and having a height outside the center. Instead of the mode in which the collecting gutters are arranged facing each other so that the side plate on the larger side is arranged, as shown in FIG. Are also arranged on one side in the tower, and side plates on the larger side are arranged on the other side in the tower so as to be aligned and arranged. Further, as shown in FIG. 2b, the collection troughs which are left and right asymmetrical are symmetrically arranged so that the side plate having a smaller height is disposed on the center side in the column and the side plate having a larger height is disposed on the outside. In a mode in which the liquid collecting gutters are arranged, a symmetrical liquid collecting gutter may not be arranged at the center. In this case, as shown in FIG. 2b, the liquid does not fall through the gap between the collecting troughs facing each other at the center.
Although it is preferable to dispose the eaves member 7 between these collecting troughs, even if such an eaves member is not arranged, the liquid flow falling between the gaps is a very small amount as viewed from the whole. So you can ignore it.

[0005] As another example of the liquid collecting device, one having a configuration as shown in FIG. 4 is also used in the art. FIG. 4A is a perspective view of the liquid collecting device, and FIG. 4B is a cross-sectional view as viewed from the direction of the arrow in FIG. 4A. The liquid collecting device shown in FIG. 4 has the same shape as that shown in FIG. 1, but has a structure in which a liquid stopping member is not disposed at both ends and is opened, and a hole is not formed in a gutter portion. Are provided in parallel with each other, and a shelf member 15 extending in the inner circumferential direction is provided on the inner wall of the tower 50 that accommodates the liquid collection gutter. The open end of each liquid collecting gutter 12 is placed on the liquid crystal gutter 12. When such a liquid collecting device is arranged in the middle part of the tower, the liquid falling from the upper filler is collected by the side plate of each liquid collecting gutter 12 and once stored in the liquid collecting gutter. It flows down from the end of the liquid collecting gutter and flows into the shelf member 15. One or a plurality of guide tubes 16 are connected to the shelf member, through which the liquid is guided to a vertical tube of a liquid distributor as shown in FIG. Redistribution is achieved. In addition, also in this type of liquid collecting apparatus, as shown in FIG. 1c, each liquid collecting gutter has an arrangement mode in which each liquid collecting gutter has a small height side plate on one side. It is needless to say that it is also possible to adopt a mode in which the side plates on the larger side are arranged on the other side so as to be arranged respectively.

[0006] As described above, the liquid collecting device collects the liquid flow deflected in the gas-liquid contact tower once and distributes the liquid flow uniformly again on the cross section of the column by the liquid distributor. In a gas-liquid contact column, it is necessary to achieve a uniform distribution of the liquid stream over the height of the column.

[0007] However, the conventional liquid collecting apparatus as described above has the following problems. The liquid collected by the side plate of each collecting trough flows on the surface of the side plate and flows into the trough portion. In the case of a collecting trough having a structure as shown in FIG. 1, a hole 3 formed in the center portion is formed. Flow down from However, the liquid flowing on the outer side plate of the liquid collecting gutter, that is, the side plate 6 on the side with the larger height, is accelerated due to the large height of the side plate, and flows into the gutter portion vigorously. Therefore, a turbulent flow of the liquid is generated particularly in the vicinity of both ends of the gutter, and a phenomenon occurs that the liquid does not flow smoothly toward the central hole. In order to make full use of the function of the liquid collecting device that collects the liquid flowing down from above, guides it to the liquid redistributor, and quickly and uniformly redistributes it, the collected liquid should be as smooth and as possible as possible. It is necessary to promptly guide the liquid redistributor,
As described above, if a turbulent flow is generated in the gutter, and the smooth flow of the liquid is hindered, the liquid will remain in the gutter and the liquid cannot be rapidly redistributed. In addition, the turbulent flow in the gutter causes turbulence in the liquid level of the liquid contained in the gutter, and the liquid flows downward beyond the side plate 5 on the lower side and the liquid stopping members 4 at the left and right ends. As a result, a situation occurs in which the liquid cannot be guided to the liquid redistributor (see FIGS. 1B and 1C).
A similar problem occurs in the case of a collecting trough having a structure as shown in FIG. That is, since a turbulent flow occurs in the flow of the liquid in the gutter, the liquid may not flow smoothly to the end of the gutter, or the liquid may flow down over the side plate.

The inventor of the present invention has made intensive studies to solve such a problem, and as a result, arranged a barrier member extending in the lateral direction on the surface of the side plate on the side where the height of the collecting trough is larger. By doing so, it has been found that the generation of turbulence in the gutter portion can be suppressed, and the liquid can flow smoothly toward the discharge portion, and the present invention has been completed. That is, the present invention supplies liquid from above and gas from below,
A liquid collecting device installed inside a tower for exchanging substances and / or heat between two substances by contacting gas and liquid inside, comprising a plurality of liquid collecting troughs arranged in parallel with each other. The liquid collecting gutter located at the center has a symmetrical shape with the left and right side plates having almost the same height, and the other liquid collecting gutters have a small height of the central side plate and a large height of the outer side plate. The present invention relates to a liquid collecting apparatus having a laterally asymmetric shape, wherein a barrier member extending in a lateral direction is disposed on a surface of a side plate having a larger height in each liquid collecting trough.

Hereinafter, various embodiments of the liquid collecting apparatus according to the present invention will be described in detail with reference to the drawings.

First, referring to FIGS. 4 and 5, an embodiment in which the present invention is applied to a liquid collecting apparatus having a configuration as shown in FIG. 4, that is, a liquid flowing down from both ends of each liquid collecting trough. I will explain while. FIG. 5a is a perspective view showing one of the liquid collecting gutters according to the present invention, and FIG. 5b is a cross-sectional view of a state where a plurality of liquid collecting gutters according to the present invention are arranged in parallel as viewed from the lateral direction. is there. As described above, such a liquid collecting apparatus is constituted by a plurality of liquid collecting troughs 12 extending substantially horizontally in parallel with the diameter of the exchange tower 50. Each collection gutter is
The outer one has a shorter length, and when viewed from above, the shape and size of the entire liquid collecting device almost match the sectional shape (usually circular) and size of the tower. ing. In each of the liquid collecting gutters, the liquid collecting gutter 21 located at the central portion has a symmetrical shape in which the left and right side plates have substantially the same height. The left and right side plates 23 have a large left-right asymmetric shape (see FIG. 5B). The end of each collecting trough is open.
Further, a shelf member 15 extending in the inner circumferential direction is provided on the inner wall of the tower accommodating the liquid collection gutter, and the end of each liquid collection gutter is placed on the shelf member. (See FIG. 4b). In the liquid collecting apparatus according to one embodiment of the present invention, in each of the liquid collecting gutters having such a configuration, the barrier member 25 extending in the lateral direction is provided on the surface of the side plate 22 having the larger height located outside. It is characterized by being arranged (see FIG. 5).

As described above, when the barrier member 25 is disposed on the side plate 24 of the liquid collecting gutter, when the liquid captured by the upper portion of the side plate 24 flows down on the surface of the side plate, the barrier member 25 causes the liquid to flow. Once dammed, a part of the liquid flow flows downward from the openings at both ends of the barrier member, and a part of the liquid flows over the barrier member and further down into the gutter part. As described above, since the flow velocity of the liquid flowing down on the side plate is reduced by the presence of the barrier member, the flow velocity of the liquid flowing down from the side plate is too fast, and the liquid flow in the gutter becomes turbulent. A situation in which the liquid does not flow smoothly to both ends, or the turbulent flow causes the liquid surface of the liquid flow in the gutter to be disturbed, and a part of the liquid flows downward beyond the side plate 25 of the V-shaped collecting trough. Can be suppressed. The liquid flowing down from the open portions at both ends of the barrier member flows down into the shelf member disposed immediately below the barrier member, and is guided to, for example, the liquid redistributor by the guide tube.

In the embodiment of the present invention, the barrier member 25
May be a linear member extending over the entire width of the side wall 24 of the collecting trough, as shown in FIG. In order to further promote the flow of the liquid from the end of the barrier member, FIG.
As shown in (1), the barrier member 26 can also be configured by arranging a V-shaped member such that the center is high and the ends are low. In this case, a gap is formed by dividing the central portion, and a part of the liquid flow flowing down on the side plate 24 of the collecting trough (the liquid flow flowing down the central portion of the side plate 24) is formed by a barrier member. It may be made to flow directly to the gutter part without being blocked. In this case, the turbulent flow of the liquid in the gutter portion is suppressed by reducing the amount of the liquid flow reaching the gutter portion.

FIGS. 1 and 7 show an embodiment in which the present invention is applied to a liquid collecting apparatus having a structure as shown in FIG.
This will be described with reference to FIG. FIG. 7 is a perspective view of a liquid collecting gutter according to the embodiment of the present invention. A liquid collecting device having a configuration as shown in FIG. 1 includes a trough-shaped liquid storage member 1 extending substantially horizontally along the diameter of the exchange tower 50, and a trough-shaped liquid storage member 1 disposed above the trough and extending in a direction intersecting the trough. And a plurality of collecting troughs 2 extending substantially horizontally. Each collection gutter is
The outer one has a shorter length, and when viewed from above, the shape and size of the entire liquid collecting device almost match the sectional shape (usually circular) and size of the tower. ing. In each of the liquid collecting gutters, the liquid collecting gutter located at the center has left and right side plates that are almost symmetrical in height, and the other liquid collecting gutters have smaller central side plate heights and outer side plate heights. It has a large left-right asymmetric shape. A liquid stop plate 4 is disposed at an end of each liquid collecting gutter, and a hole 3 is provided at a central portion of each liquid collecting gutter, that is, a portion located directly above the liquid storage member 1.
Is provided. The liquid stop plate 4 can be attached to the liquid collecting gutter by a method known in the art such as seal welding. The idea of the present invention can be applied to a liquid collecting device having such a configuration. That is, according to this aspect of the present invention, in each liquid collecting trough having a configuration as shown in FIG. 1, the barrier member extending in the lateral direction is provided on the surface of the side plate 34 located on the outer side where the height is large. 35 are arranged (see FIG. 7).

In the embodiment of the present invention, the barrier member 35
As shown in FIG. 7, it is preferable that the center part is composed of two members divided at the center part, and a gap is formed at the center part. Further, it is preferable to arrange the two members at an angle so that the divided central portion is low and the end portions are high. Further, it is more preferable to arrange a liquid stopping plate 36 at the outer end of the barrier member 35. However, even if the barrier member is formed of one linear member, or an arc-shaped or V-shaped member is arranged so that the center is lowered, and a hole for liquid outflow is formed in the center thereof. Good.

The barrier member 35 is connected to the side plate 3 of the collecting trough.
4, the same effect as in the above-described first embodiment can be obtained. That is, when the liquid trapped by the upper portion of the side plate 34 flows down on the surface of the side plate, the liquid is blocked by the barrier member 35, and the liquid flow is formed by a gap or hole formed in the center of the barrier member. , And is accommodated in the lowermost gutter portion and flows down from a hole 37 formed in the center of the gutter portion. By disposing such a barrier member, when the barrier member does not exist, the side plate 34 of the liquid collection gutter is provided.
The speed of the liquid flowing down is too high, and the liquid flow flowing through the gutter in the vicinity of both ends of the gutter becomes turbulent. As a result, the liquid flows smoothly toward the hole 37 at the center of the gutter. The phenomenon of no presence is suppressed. In particular, the liquid flow once dammed by the barrier member 35 causes a gap (or hole) in the central portion.
Therefore, the liquid flows directly toward the central hole 37 of the gutter, and the situation where the liquid stays near both ends of the gutter can be suppressed.
Further, even when the amount of liquid flowing down from above the side plate 34 is large and the liquid flow flows downward beyond the barrier member 35, the speed of the liquid flow is reduced by the presence of the barrier member. The generation of the turbulent flow of the liquid in the gutter portion is considerably suppressed.

As described above, in the liquid collecting apparatus according to the present invention,
It has been described that by attaching the barrier member to the side plate of the liquid collecting gutter, the adverse effects caused by the liquid flowing down the side plate of the liquid collecting gutter are suppressed. In the present invention, the presence of the barrier member can further suppress the adverse effect of droplets falling from above the tower. This will be described with reference to FIG. In the liquid collecting apparatus according to the present invention, a plurality of liquid collecting gutters are arranged in parallel, and a side plate of each liquid collecting gutter is arranged so as to cover a part of an adjacent liquid collecting gutter. For example, the right side plate 42 of the liquid collecting gutter 41 at the left end in FIG.
Are arranged so as to cover the lower side plate 45 of the adjacent collecting trough 43 (see FIG. 8). That is, a vertical line (the dotted line X in FIG. 8) from the upper end of the side plate 42 of the liquid collecting trough 41.
Are located on the side plate 45 of the adjacent collecting trough 43. Therefore, the droplets falling from the upper part of the tower are shown in FIG.
It can be seen that the liquid droplets that are collected by the liquid collecting gutter 41 at the left end and fall from the dotted line to the right region are collected by the liquid collecting gutter 43 in the center of FIG. Therefore,
Drops fall directly from above into the liquid flow 47 flowing through the gutter,
Will be mixed. This not only causes a situation in which the droplets of the liquid drops fall below the side plate 45 on the lower side of the collecting gutter, but also causes the liquid flow in the gutter portion to be greatly disturbed by the falling liquid droplets, thereby causing the liquid in the gutter portion to drop. In some cases, the liquid 47 in the gutter portion may fall below the side plate 45 due to the impact of the droplet. This problem is particularly serious when the height of the tower is large, and has been a serious problem in the conventional liquid collecting apparatus.

The liquid collecting device according to the present invention solves this problem to some extent. As shown in FIG. 8, the liquid collecting apparatus according to the present invention includes a barrier member 46 on the side plate 44 of the liquid collecting gutter.
The arrangement position and the height of the barrier member 46 are appropriately selected, and the barrier member 46 is provided.
However, by covering a part of the gutter portion, it functions as an eave for the liquid flow 47 flowing through the gutter portion (see FIG. 8). This allows at least a portion of the liquid stream 47 to
Will be protected against droplets falling from above,
Problems such as turbulence of the liquid flow due to the drop of the droplet are alleviated.

In the liquid collecting apparatus according to the present invention, the position, height and shape of the barrier member, the rising direction (installation angle) of the barrier member, and the like are appropriately determined by those skilled in the art in consideration of various operation parameters of the contact tower. Can be determined. In this case, as described above, it is preferable that the barrier member covers the liquid flow in the gutter portion and provides protection against droplets falling from above. However, if the height of the barrier member is too high, it is not desirable because it becomes an obstacle to the gas flow flowing upward through the space between the collecting troughs.

The sectional shape of the liquid collecting trough in the liquid collecting apparatus according to the present invention may be any shape as long as both side plates are formed so as to open upward.
For example, the shape may be V-shaped as shown in the accompanying drawings, or may be U-shaped or inverted trapezoidal.

The above description has been made in such a manner that the collection trough is symmetrical with respect to the center so that the side plate having a smaller height is disposed inside and the side plate having a larger height is disposed outside. Although an example in which the present invention is applied to a liquid collecting device in an aspect in which the liquid collecting troughs are arranged is described, for example, as shown in FIG. 1c or FIG. 5c, each liquid collecting trough has a small height. The side plate on one side is on one side, the side plate on the larger side is on the other side,
The present invention can also be applied to a liquid collecting device in a mode in which the liquid collecting devices are arranged so as to be arranged, and in this case, the same effect can be obtained.

That is, another aspect of the present invention is to supply a liquid from above and a gas from below, and to contact the gas and liquid inside to exchange a substance and / or heat between the two substances. A liquid collecting device used for once collecting a liquid flow flowing down the tower, and is composed of a plurality of liquid collecting gutters arranged in parallel with each other, and each of the liquid collecting gutters has one side. The height of the side plate is smaller and the height of the other side plate is larger than that of the left and right asymmetric plates, and the respective side plates having the larger height and the side plate having the smaller height are arranged on the same side. The present invention relates to a liquid collecting apparatus in which liquid troughs are arranged, and in each liquid collecting trough, a barrier member extending in a lateral direction is disposed on a surface of a side plate having a larger height.

Although the above description has been made only with respect to some arrangement states of the collecting troughs, the present invention relates to a liquid collecting apparatus in which a plurality of asymmetrical collecting troughs are combined to constitute an apparatus. It will be apparent to those skilled in the art that the present invention can be applied to any arrangement of the liquid collecting gutters, if any.

[0023]

In the liquid collecting apparatus according to the present invention, the barrier member is disposed on the side plate of the liquid collecting gutter so that the liquid flow in the gutter portion is turbulent due to the liquid flowing down on the side plate of the liquid collecting gutter. As a result, it is possible to suppress a situation in which the liquid flow does not smoothly flow toward the discharge portion, or flows downward over the side plate. Therefore, the function of the liquid redistributor, which effectively collects the liquid by the liquid collecting device and uniformly redistributes the liquid by the liquid distributor, can be effectively exhibited.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of a liquid collecting device. FIG. 1a is a perspective view of the liquid collecting device, and FIG. 1b is a cross-sectional view as viewed from the direction of the arrow in FIG. 1a. FIG. 1C is a cross-sectional view showing the arrangement of the liquid collecting gutters in the liquid collecting apparatus of another embodiment.

FIG. 2 is a diagram illustrating an example of a liquid collecting apparatus according to another embodiment. FIG.
FIG. 7A is a cross-sectional view showing an arrangement state of a liquid collecting gutter in a liquid collecting apparatus of another embodiment. FIG. 2B is a cross-sectional view showing an arrangement state of a liquid collecting trough in a liquid collecting apparatus of still another embodiment.

FIG. 3 is a perspective view showing an example of a liquid distributor used in the technology.

FIG. 4 is a diagram showing another example of the liquid collecting device. FIG. 4a is a perspective view of the liquid collecting device, and FIG. 4b is a cross-sectional view as viewed from the direction of the arrow in FIG. 4a.

FIG. 5 is a view showing a liquid collecting gutter constituting the liquid collecting apparatus according to the present invention. FIG. 5A is a perspective view of the liquid collecting gutter, and FIG. 5B is a cross-sectional view showing the arrangement of the liquid collecting gutter. FIG. 5C is a cross-sectional view showing the arrangement of the liquid collecting gutters in the liquid collecting apparatus according to another embodiment of the present invention.

FIG. 6 is a view showing a liquid collecting gutter included in a liquid collecting apparatus according to another embodiment of the present invention.

FIG. 7 is a view showing a liquid collecting gutter constituting a liquid collecting apparatus according to another embodiment of the present invention.

FIG. 8 is a conceptual diagram showing a further effect of the liquid collecting gutter according to the present invention.

Claims (5)

[Claims] 1. A liquid is supplied from above and a gas is supplied from below,
Installed inside a tower that exchanges substances and / or heat between both substances by contacting gas and liquid inside,
A liquid collecting device used to temporarily collect a liquid flow flowing down a column, the liquid collecting device includes a plurality of liquid collecting gutters arranged in parallel with each other, and at least a part of the liquid collecting gutter is provided on one side plate. Barrier member extending laterally on the surface of the side plate having the higher height in each of the asymmetric liquid collecting troughs, the height being smaller than the height of the other side plate. A liquid collecting device, wherein 2. At least one of the liquid collecting gutters has a left and right side plate having a symmetrical shape with substantially the same height, and a left and right asymmetrical liquid collecting gutter is provided on both sides of the left and right symmetrical liquid collecting gutter. The side plate on the smaller side is located on the side close to the left-right symmetrical liquid collection gutter, and the side plate on the higher side is arranged on the side separated from the left-right symmetrical liquid collection gutter, respectively. The liquid collecting device according to claim 1, wherein each liquid collecting trough is arranged. 3. The collecting troughs are arranged such that the side plate with the larger height and the side plate with the smaller height of each collecting trough are arranged on the same side in the tower. The liquid collecting device according to claim 1. 4. An end portion of each collecting trough is open, and a shelf member extending in an inner circumferential direction is provided on an inner wall of a tower in which the collecting trough is housed. The liquid collecting apparatus according to any one of claims 1 to 3, wherein an open end of each liquid collecting gutter is placed on the liquid collecting gutter. 5. A trough-shaped liquid storage member extending substantially horizontally along the diameter of the tower in a direction intersecting with each of the liquid collection gutters, and a trough-shaped liquid at the center of each of the liquid collection gutters. A hole is provided in a portion located directly above the storage member, and a liquid stopping member is disposed at an end of each liquid collecting trough. Liquid collecting device.