JPH06238101A - Gas-liquid contacting device - Google Patents

Abstract

PURPOSE:To lower the manufacturing cost of trays by arranging the 1st frame where the height of a liquid receiver is the same as that of a perforated plate on the underside of the perforated plate, joining the perforated plate and the 1st frame and further installing the 2nd frame below crossing the 1st frame. CONSTITUTION:Pans, such as a perforated plate 2, an overflow pipe 5, a liquid receiver 6, the 1st and 2nd frames 7, 8 and a support ring 9 constituting a tray 10 are manufactured separately. At this time, the 1st frame 7 is jointed to the perforated plate 2 so that the height h1 of it including the perforated plate 2 may be the same as that h3 of the liquid receiver 6. And after the perforated plate 2 and the 1st frame 7 are jointed by spot welding, the overflow pipe 5, the liquid receiver 6 and the support ring 9 are arranged in prescribed places and all the parts, such as the perforated plate 2 are assembled and jointed with the 2nd frame 8 being abutted on undersides 6a, 7a of the liquid receiver 6 and the 1st frame 7 respectively. The 2nd frame 8 is jointed to the side 9a of the support ring 9 at its end 8a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION A gas-liquid contactor equipped with an overflow pipe and a liquid receiver is widely used as a gas-liquid contactor in the chemical industry such as distillation, rectification and adsorption. The invention is particularly
The present invention relates to the structure and manufacturing method of an apparatus for liquefying air and separating nitrogen, oxygen, argon, etc. from the air by a rectification operation.

[0002]

2. Description of the Related Art A gas-liquid contact device is described, for example, in the document "Distil.
Relation Engineering ”(HEYDEN 1979) 301-308
As described in the page, a tray is formed by arranging a perforated plate in which a large number of small holes are arranged on a flat plate, and the tray is arranged in a plurality of stages in the longitudinal direction of the tower. here,
When the diameter of the tower increases, the tray in each stage is generally formed by combining a plurality of perforated plates with a large number of small holes. The adjoining perforated plates are formed by bending one end of one perforated plate to form a recess and a flange portion corresponding to the plate thickness, and overlapping the end of the other perforated plate in the recess to form an overlap method. This is carried out by a flange joint method in which an end portion of a perforated plate is bent to form a flange portion and the flange portions are brought into close contact with each other, and a frame joint method in which a skeleton is arranged at a connecting portion of both perforated plates.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
In order to keep the overall deflection of the tray within the target value, at the connecting part of the perforated plate, bend the end part of the perforated plate to increase the height to form a skeleton, or as a reinforcing member, have a high bending rigidity. It was necessary to arrange the skeleton. Therefore, a lot of time was spent on making the tray. Also,
In a large-capacity gas-liquid contactor, the tower diameter becomes large, and accordingly, it is necessary to further increase the out-of-plane bending rigidity of the tray. The optimum location for the installation was also selected to join the perforated plate. Further, if the overflow pipe and the liquid receiver are present in the tray in the form of a non-continuous surface with the perforated plate, the rigidity in the direction of the non-continuous surface decreases, so it is necessary to further add the above-mentioned reinforcement. A lot of time was spent on manufacturing and assembling. Further, in the tray, as the height of the skeleton increases, the step interval between the upper and lower positions expands, and the size of the entire apparatus is further increased.

An object of the present invention is to reduce the total manufacturing man-hours, mainly for assembly, in the case where the tray has an overflow pipe and a liquid receiver, and to structure and manufacture the tray which can cope with an increase in size. To provide a method.

[0005]

In order to achieve the above object, the first means is that the height of the liquid receiver is provided on the lower surface of the perforated plate,
A first frame having the same height including the plate thickness of the perforated plate is arranged in a direction parallel to the liquid receiver, the perforated plate and the first frame are joined, and a second frame is provided under the first frame. It is arranged so as to intersect with the first skeleton, and the first skeleton and the second skeleton are joined to form a tray.

In the second means, when the tray has a plurality of liquid receivers having different heights, the first frame having the same height including the plate thickness of the perforated plate is used as the liquid receiver having the lowest height. The height of the second frame is the same as the height of the second frame, and the second frame is locally recessed on the side of the first frame at a portion of the liquid container having a height larger than that of the liquid container. Is to be located.

In the third means, when the tray has a plurality of liquid receivers having different heights, the first frame having the same height including the plate thickness of the perforated plate is used as the liquid receiver having the highest height. The liquid receiver and the second skeleton are joined to each other by using the third member at the intersection with the second skeleton at the position of the liquid sickness that is the same as the height and is lower than the liquid sickle. Is.

According to a fourth means, the perforated plate between the overflow pipe and the liquid receiver is divided into a plurality of parts in the direction of the overflow pipe and the liquid receiver, and the end of the divided perforated plate in the direction is the lower one. It is bent in the direction of the tray so that the height of the bent portion is equal to or less than the height of the liquid receiver, and the bent portion and the second skeleton are joined.

A fifth means is the same as the first to fourth means, wherein the second skeleton is arranged in the average flow direction of the liquid and is brought into contact with the lower tray.

[0010]

In the first means, the local out-of-plane rigidity of the perforated plate is increased when the height of the liquid receiver is one.
And the lower surface of the liquid receiver and the lower surface of the liquid receiver are the same surface, and a second frame having a bending rigidity higher than that of the first frame is brought into contact with the liquid receiver and the first frame on the lower surface of the liquid receiver and the first frame, It can be easily arranged between the support rings arranged on the outer periphery with the same cross section in the liquid flow direction, and the overall manufacturing cost centering on the tray assembly can be reduced.

In the second and third means, when the diameter of the tray is increased and two or more heights of liquid receivers are provided, the tray is joined to the perforated plate to increase the local out-of-plane rigidity of the perforated plate. The lower surface of the first frame is made to coincide with the lower surface of the liquid receiver having the lowest height or the lower surface of the liquid receiver having the highest height, and the second frame is joined to the lower surface of the first frame. ,
The second skeleton has the same cross section and can be easily arranged between the support rings arranged on the outer periphery, and the overall manufacturing cost centering on the tray assembly can be reduced.

In the fourth means, the perforated plate between the overflow pipe and the liquid receiver is divided, and the end of the divided perforated plate in the above direction is bent toward the lower tray. The bending rigidity can be increased, the perforated plate can be easily handled when the tray is assembled, and the overall manufacturing cost can be reduced.

In the fifth means, in the first to fourth means, the lower surface of the second skeleton is brought into contact with and supported by the lower tray, so that the overall deflection of the tray is reduced. As a result, the tray can suppress the vertical deflection to a small extent even if the bending rigidity of the second frame is reduced as compared with the case without support. Therefore, the tray can be made small and lightweight. Also,
Even if the tray has a large diameter, it can be manufactured with a small number of skeletons arranged, and the overall manufacturing cost centering on assembly can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
Will be explained. FIG. 1 is a cross-sectional view showing a case where the first and second frames of the present invention are joined to a perforated plate and a tray having a combination of an overflow pipe and a liquid receiver is arranged in a rectification column, and FIG. II-
FIG. 2 is a horizontal cross-sectional view of the tray according to the first embodiment of the present invention as seen from the lower surface side in a II view. In the figure, 1 is a rectification tower,
2 is a perforated plate, 3 is a liquid, 4 is a gas, 5 is an overflow pipe, 6 is a liquid receiver, 7 is the first frame of the present invention for suppressing out-of-plane deformation of the perforated plate 2, and 8 is a first frame. The second frame according to the present invention, which is disposed on the lower surface side of the first frame 7 and suppresses the vertical deflection of the whole frame, 9
Is a support ring, 10 is a perforated plate 2, an overflow pipe 5, a liquid receiver 6,
It is a tray manufactured by combining the first and second frames 7 and 8 and the support ring 9. In this embodiment, first, the perforated plate 2, the overflow pipe 5, the liquid receiver 6, the first and the second, which constitute the tray 10, are formed.
Parts such as the skeletons 7 and 8 and the support ring 9 are individually manufactured. Here, when the first frame 7 is joined to the perforated plate 2, the height h ₁ including the perforated plate 2 is the height of the liquid receiver 6.
Consider it to be the same as h ₃ . Assembling the tray 10
After joining the perforated plate 2 and the first frame 7 by spot welding,
The overflow pipe 5, the liquid receiver 6 and the support ring 9 are provided at predetermined positions, and the perforated plate 2 and other parts are combined together,
The second frame 8 is brought into contact with the lower surfaces 6a and 7a of the liquid receiver 6 and the first frame 7, respectively, and joined. The second skeleton joins the end 8a with the side 9a of the support ring 9. FIG. 2 shows the tray 1 of FIG.
Although 0 is shown from the bottom side, the first frame 7 also has both ends 7a and 7b joined to the side surface 9a of the support ring 9. In addition, the first frame 7 has the porous plate 2 in the loaded state.
The number and positions of the arrangement are determined so that the out-of-plane deformation of is less than or equal to the design value. Although the number of the second skeleton 8 is one in FIG. 2, the rigidity, the number and positions of the second skeletons 8 are selected so that the vertical deflection of the entire tray 10 is equal to or less than the design value in the loaded state. The overflow pipe 5 intersects the second frame 8 because the height h ₂ needs to be close to the liquid receiver 6b of the lower tray 10b, and is divided at the second frame 8 as a boundary. It arranges. As a result, the tray 10 is provided between the overflow pipe 5, the liquid receiver 6 and the support ring 9 such that the reinforcement 10 that reinforces the local out-of-plane deformation of the perforated plate 2 and the members that suppress the entire vertical deflection are arranged and joined. Assembling becomes easy, and the total number of manufacturing steps can be reduced. In such a rectification tower 1,
The liquid 3 flows down from the overflow pipe 5a of the upper tray to the liquid receiver 6, then flows on the perforated plate 2 in the direction of the overflow pipe 5, and then flows down from the overflow pipe 5 to the liquid receiver 6b of the lower tray 10b. On the other hand, the gas 4 flows upward from the lower part of the tray 10 through the small holes of the porous plate 2. The contact between the liquid 3 and the gas 4 occurs at this time, and by repeating this, the rectification operation of the gas 4 and the liquid 3 is performed.

Next, a second embodiment will be described with reference to FIGS. 3 to 8. In FIG. 3, the diameter of the tray 10 'is increased, and the overflow pipes 5 and 5'and the liquid receivers 6 and 6'are provided in one tray 10'.
Section of the rectification column 1 in which there are two locations and the heights h ₃ and h ₃ ′ of the liquid receivers 6 and 6 ′ are different, and FIG. 4 is a IV-IV view of FIG. The diameter of
The cross-sectional view when the perforated plates 2 and 2 ′ are joined at the center, and FIGS. 5 and 6 are the application examples when the perforated plates 2 and 2 ′ shown in FIG. 4 are joined at the center, respectively. Is VII-V in FIG.
II is a cross-sectional view showing a method of joining the liquid receiver 6'and the second frame 8 ', and FIG. 8 is an application example relating to the view VIII-VIII of FIG. 3, in which the porous plate 2 and the first frame 7 are connected. It is sectional drawing of the joining method of. In the figure, 11 is a member arranged as a reinforcing material at the joint between the porous plates 2 and 2 ', 12 is an L-shaped member for joining the liquid receiver 6'and the second frame 8', and 13 is the liquid receiver. A member arranged as a reinforcing member when joining 6'and the second frame 8 ',
Reference numeral 14 is spot welding, and 15 is an L-shaped member provided as a reinforcing material when the perforated plate 2 and the first frame 7 are joined together.
The same reference numerals as those in the above-mentioned embodiments indicate the same members. In the present embodiment, the perforated plate 2, the overflow pipe 5, which constitute the tray 10 ',
5 ', liquid receiver 6, 6', first frame 7 and support ring 9
Etc. are manufactured independently as in the first embodiment. The second skeleton 8 ′ is such that when the first skeleton 7 is joined to the perforated plate 2 and the second skeleton 8 ′ is arranged on the lower surface of the first skeleton 7, a large liquid receiver 6 ′ having a height h ₃ ′ can be attached. Then, the corresponding portion 8'a is processed. The tray 10 'is assembled by the overflow pipe 5,
5'and the liquid receivers 6 and 6'are respectively arranged at the locations shown in FIG. 3, and the same method as in the first embodiment is used. here,
If the perforated plate 2 cannot be composed of one sheet between the overflow pipe 5 and the liquid receiver 6, it is composed of a plurality of sheets. For example, regarding the space between the overflow pipe 5 and the liquid receiver 6, as shown in FIG. 4, the end portion 2'a of one porous plate 2'is cut back and the other porous plate 2 is cut.
It is superposed on the end portion 2a of and is joined by spot welding 14. When the joining direction of the plurality of perforated plates 2 and 2'is substantially the same as the flow direction of the liquid, as shown in FIG. 5, the end 2'b of one of the perforated plates 2'is bent in the out-of-plane direction. Alternatively, a method of joining at the back cut portion 2'c may be used. Further, as shown in FIG. 6, another member 11 may be provided at the joint and joined together.
As a result, the out-of-plane bending rigidity of the joint between the perforated plates 2 and 2'is increased, and the perforated plate is easily handled during assembly. In addition, strength reliability during use is improved at the joint portion of the perforated plates. The joint between the liquid receiver 6'and the second frame 8'is, as shown in FIG. 7, one of the L-shaped members 12 at the processing point 8'a so that the liquid receiver 6'having a large height can be attached. The surface is the back surface of the liquid receiver 6 ', and the other surface is the second frame 8'.
Each of them is applied to the processing points 8'a and joined by spot welding 14. Here, as shown in FIG. 7, when the member 13 is disposed in the liquid receiver 6 ′ and joined together with the L-shaped member 12 and the liquid receiver 6 ′, spot welding 1 of the liquid receiver 6 ′ is performed.
In the vicinity of 4, the out-of-plane deformation is suppressed and the strength reliability of the main joint is improved. As for the joint between the perforated plate 2 and the first skeleton 7, as shown in FIG. 8, the first skeleton 7 and the perforated plate 2 are sandwiched, for example, with the convex portion of the L-shaped member 15 in the flow direction of the liquid. By arranging in this way and joining by spot welding 14, the same effect as the joining portion of the liquid receiver 6 ′ and the second frame 8 ′ shown in FIG. 7 can be obtained. As a result, even if the tray has a large diameter, it has the same structure as that of the first embodiment shown in FIGS. 1 and 2, and the whole assembly is easy and the manufacturing man-hour can be reduced. In the rectification tower 1 as described above, the liquid 3 flows down from the overflow pipes 5a, 5'a of the upper trays into the liquid receivers 6, 6 ', and then the overflow pipe 5, over the perforated plate 2,
5 ', and the tray 1 below the overflow pipes 5, 5'
It flows down to the liquid receivers 6b and 6'b of 0b. On the other hand, gas 4
Flows through the small holes of the perforated plate 2 from below the tray 10 to above. The contact between the liquid 3 and the gas 4 occurs at this time, and by repeating this, the rectification operation of the gas 4 and the liquid 3 is performed.

Next, a third embodiment will be described with reference to FIG.
FIG. 9 is a sectional view of a rectification column 1 to which another application example of the second embodiment is applied. In the figure, 16 is an auxiliary member for joining the liquid receiver 6 having a small height and the second frame 8, and 17
Is the tray of this embodiment. The same reference numerals as those in the above-mentioned embodiments indicate the same members. In this embodiment, the perforated plate 2, the overflow pipes 5 and 5 ', the liquid receivers 6 and 6', the support ring 9 and the like which form the tray 17 are individually manufactured in the same manner as in the second embodiment. The first framework 7 ', when bonded to the porous plate 2, the height including the perforated plate h _1' is to consider to be the same as the height h ₃ of the receiving liquid 6 '. It is considered that the second frame 8 can be joined by contacting the lower surfaces 6'a and 7'a of the liquid receiver 6'and the first frame 7 ', respectively. In assembling the tray 17, as shown in FIG. 9, the auxiliary member 16 is provided to join the liquid receiver 6 having a small height and the second frame 8. Joining and assembling of other parts are performed in the same manner as in the first and second embodiments. As a result, the same effect as the second embodiment can be obtained.

Next, a fourth embodiment will be described with reference to FIG. FIG. 10 is a cross-sectional view of a rectification column in which a tray obtained by dividing a perforated plate into a plurality of overflow pipes and a liquid receiving direction is arranged.
In the figure, 18 is a perforated plate divided into a plurality of pieces in the direction of the overflow pipe and the liquid receiver, and 19 is a reinforcing member arranged at the joint between the perforated plates 18. The same reference numerals as those in the above-mentioned embodiments indicate the same members. In this embodiment, the end of the perforated plate 18 in the direction of the overflow pipe and the liquid receiver is bent toward the lower tray as shown in FIG. The height of the bent portion of the perforated plate 18 is set so that the height of the liquid receiver is the same. Next, the bent portions 18 a of the perforated plate 18 are brought into contact with each other and joined by spot welding 14. Here, at the joint portion of the perforated plate 18, care is taken so that the local deformation of the perforated plate between the overflow pipe 5 and the liquid receiver 6 is equal to or less than the design value. That is, when the rigidity of this portion is insufficient, the reinforcing members 19 are joined together by spot welding. In this case, the height h ₁ of the joint between the porous plates 18 including the reinforcing member 19 is set to be the same as the height h ₃ of the liquid receiver. The reinforcing member 19 joins with the second frame 8. Assembly and joining of other parts are performed in the same manner as in the first to third embodiments. Thereby, the perforated plate 18 is
Since the rigidity of a single item is improved, it becomes easier to handle during assembly. The manufacturing man-hour is reduced for the entire tray.

Next, a fifth embodiment will be described with reference to FIGS. 11 and 12. 11 is a cross-sectional view relating to the positional relationship between the stacked trays, and FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. In the figure, 20 is a pipe arranged on the lower surface of the second frame 8. The same reference numerals as those in the above-mentioned embodiments indicate the same members. In this embodiment, the pipe 18 is arranged on the lower surface of the second frame 8c in the liquid flow direction. Here, the height of the second skeleton 8 and the diameter of the pipe 20 are taken into consideration so that the upper and lower trays 10 and 10 a contact each other through the pipe 18. As a result, the tray 10 located at the upper position
Will be supported at the place where the pipe 18 is arranged, and the vertical deflection of the whole can be suppressed small. Therefore, it is possible to reduce the size and weight of the second frame 8c, which greatly affects the vertical deflection of the entire tray. Further, since the pipe 20 is brought into contact with the second frame 8 and the perforated plate 2, it is possible to minimize the obstruction of gas passage through the perforated plate.

[0019]

EFFECT OF THE INVENTION The tray can be manufactured at a low cost and can be effectively restrained from being deformed out-of-plane. The effect that can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a rectification column incorporating a tray according to a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of a rectification column incorporating the tray of the first embodiment of the present invention, which is a view taken along line II-II of FIG.

FIG. 3 is a vertical cross-sectional view of a rectification column incorporating the tray of the second embodiment of the present invention.

4 is a cross-sectional view of a porous plate joined at the center in a second embodiment of the present invention, which is a view taken along line IV-IV of FIG. 3. FIG.

FIG. 5 is a cross-sectional view of an application example in which a perforated plate is joined at the center in the second embodiment of the present invention.

FIG. 6 is a cross-sectional view of an application example in which a perforated plate is joined at the center in the second embodiment of the present invention.

7 is a cross-sectional view showing a method of joining the liquid receiver and the second frame in the second embodiment of the present invention, and is a view taken along line VII-VII of FIG. 3. FIG.

8 is a cross-sectional view showing a method of joining the perforated plate and the first frame in the second embodiment of the present invention, which is a view taken along the line VIII-VIII in FIG. 3. FIG.

FIG. 9 is a cross-sectional view of a rectification column incorporating the tray of the third embodiment of the present invention.

FIG. 10 is a sectional view of a rectification column incorporating the tray of the fourth embodiment of the present invention.

FIG. 11 is a partial cross-sectional view of a rectification column incorporating the tray of the fifth embodiment of the present invention.

FIG. 12 is a partial cross-sectional view of a rectification column incorporating the tray of the fifth embodiment of the present invention, which is a view taken along line XII-XII of FIG. 11.

[Explanation of symbols]

1 ... rectification tower, 2 ... perforated plate, 3 ... liquid, 4 ... gas, 5 ... overflow pipe, 6 ... liquid receiver, 7 ... first skeleton, 8 ... second skeleton,
9 ... Support ring, 10, 17 ... Tray, 11 ... Member, 1
2 ... L-shaped member, 13 ... Member, 14 ... Spot welding, 15
... L-shaped member, 16 ... Auxiliary member, 18 ... Perforated plate divided into a plurality, 19 ... Reinforcing member, 20 ... Pipe.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Komatsu Yoshimatsu 502 Jinritsucho, Tsuchiura-shi, Ibaraki Machinery Research Institute, Hiritsu Manufacturing Co., Ltd. (72) Kazuo Someya, 794 Higashitoyo, Higashitoyo, Yamaguchi Prefecture Stock Company Inside the Kasado Plant, Hitachi, Ltd. (72) Nobuyoshi Toyonaga, 794, Higashitoyo, Higamatsu, Shimomatsu, Yamaguchi Prefecture Hitachi Techno Engineering Co., Ltd., within the Kasado Plant, Hiroshi Tsushima, 794, Toyoi, Higamatsu, Yamaguchi Prefecture, Hitachi Techno Engineering Co., Ltd. Kasado Office

Claims (7)

[Claims] 1. A tray, which is formed by combining a perforated plate having a large number of small holes, an overflow pipe and a liquid receiver, is stacked in a plurality of stages inside a column so that the liquid flows from the overflow pipe of the upper tray to the liquid of the lower tray. It descends to the receiver, flows from the liquid receiver onto the perforated plate and reaches the overflow pipe, and then sequentially flows from the overflow pipe to the lower trays, and the gas rises from many holes of the perforated plate from below. In the gas-liquid contactor that performs rectification operation by bringing liquid and gas into gas-liquid contact with each other in the rectification operation, the height of the liquid receiver on the lower surface of the perforated plate and the height including the plate thickness of the perforated plate. The first skeletons having the same structure are arranged in a direction parallel to the liquid receiver, the perforated plate and the first skeleton are joined, and the second skeleton is formed on the lower surface of the first skeleton and the lower surface of the liquid receiver. The gas-liquid contactor is characterized in that the tray is formed by intersecting the skeleton and joining the first skeleton and the second skeleton. 2. The gas-liquid contactor according to claim 1, wherein when the tray has a plurality of liquid receivers having different heights, the height of the first frame including the plate thickness of the perforated plate is the height. Of the liquid receiver having the same height as that of the lowest liquid receiver, and the second skeleton is locally at the position of the liquid receiver having a height higher than that of the first liquid receiver.
The gas-liquid contactor is characterized in that the skeleton side is recessed, and the lower surface of the liquid receiver having the large height is located in the recess. 3. The gas-liquid contact device according to claim 1, wherein when the tray has a plurality of liquid receivers having different heights, the height of the first frame including the plate thickness of the perforated plate is the height. The liquid-vapor contacting device is configured to have the same height as that of the highest liquid receiver. 4. The gas-liquid contactor according to claim 3, wherein the position of the liquid receiver having a height lower than that of the liquid receiver having the highest height is
A gas-liquid contact device characterized in that the second frame is joined via a third member at the intersection with the second frame. 5. The gas-liquid contactor according to claim 1, wherein the perforated plate between the overflow pipe and the liquid receiver is divided into a plurality of parts in the direction of the overflow pipe and the liquid receiver, and the direction of the divided perforated plate is increased. The end of
A gas-liquid contact device, which is bent in the direction of a lower tray, and the height of the bent portion is equal to or less than the height of the liquid receiver. 6. The gas-liquid contactor according to any one of claims 1 to 5, wherein the second frame has an average flow direction of the liquid. 7. The gas-liquid contactor according to any one of claims 1 to 6, wherein the second frame is in contact with the lower tray.