JPH06198103A - Gas-liquid contacting device - Google Patents

Abstract

PURPOSE:To restrain the increase in manufacturing man-hour and the increase in a column scale associated with the expansion of equipment capacity and to secure the rigidity of trays in a fractionating column. CONSTITUTION:In a gas-liquid contacting device equipped with a column 1 where plural stages of trays 20 each consisting of perforated plates 21, 22 in which a lot of small holes are formed, a liquid receiver 25 and an overflow pipe 23 fitted to the tray 20 are internally installed and where liquid is caused to flow down from above along the trays while gas is caused to rise from below to bring the liquid into contact with the gas, causing fractionation to be performed, allowing the components of the gas to be separated, perforated plates 21, 21 are made of shapes which plate parts 21a, 22a and reinforcing rib parts 21c, 22c forming a frame are integrally extruded into and a lot of small holes are made in the plate parts of the shapes. Consequently the perforated plates 21, 22 of high rigidity are easily obtained and the assembling of the perforated plates 21, 22 causes the tray 20 of high rigidity to be constituted with a little man-hour.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid contactor used for distillation, rectification or adsorption in fields such as chemical industry. The present invention relates to a configuration of a tray for allowing a liquid to flow down while contacting with a gas in an apparatus for separating nitrogen, oxygen, argon, and the like.

[0002]

2. Description of the Related Art A gas-liquid contact device is, for example, a Distillation
As described on pages 301 to 308 of Engineering (HEYDEN 1979), trays composed of a combination of a plurality of perforated plates with a large number of small holes formed in a flat plate are installed in multiple stages in the longitudinal direction of the tower. ing. In a large gas-liquid contactor with a large tower diameter, each tray is composed of a combination of multiple perforated plates, and adjacent perforated plates are joined by a flange formed by bending one end of one perforated plate. Overlap method that overlaps the end of the other perforated plate with the recess of the other part, flange joint method that tightly joins the flange parts formed by bending the end parts of both perforated plates, and skeleton at the joint part of both perforated plates It is carried out by a frame joint method or the like performed by interposing.

This gas-liquid contacting device raises a gas from below while flowing a liquid from above the tower along the tray, and brings the liquid and gas into contact with each other to obtain a rectification action to obtain a component of the gas. Function to separate.

In such a conventional gas-liquid contact device, when the tray is bent, the liquid flowing down along the tray gathers in the low region and the liquid flow layer is partially thickened, so that the gas-liquid contact state is maintained. It becomes uneven and gets worse. Therefore, in order to reduce the amount of bending of the tray, it is necessary to form a flange portion or interpose a skeleton at the connecting portion of the perforated plate, which is a drawback that a large number of man-hours are required for manufacturing the tray. . Moreover, in a large-capacity gas-liquid contactor, since the diameter of the tower becomes large, it is necessary to further increase the out-of-plane bending rigidity of the tray, resulting in a large flange portion or skeleton. In order to avoid the liquid flow obstruction and air flow obstruction due to the skeleton and the frame, there is a drawback that the step interval of each tray is increased and the device shape is further enlarged.

[0005]

SUMMARY OF THE INVENTION As described above, the present invention suppresses an increase in man-hours for manufacturing trays in order to reduce the deflection of the trays in the towers, and the towers are accompanied by the capacity increase of the apparatus. The purpose is to suppress the increase in size.

[0006]

According to the present invention, a plurality of trays made of a perforated plate having a large number of small holes, a liquid receiver attached to the trays, and an overflow pipe are installed, and the trays are installed from above. In a gas-liquid contactor that raises a gas from below while flowing a liquid along a tray and separates the components of the gas by contacting the liquid and the gas, the porous plate is a flat plate part. It is characterized in that a large number of small holes are formed in the flat plate portion of a frame extruded integrally with a skeleton, or the perforated plate forms a large number of small holes in a flat plate member and It is characterized in that the frame member is brazed to the back surface, or the inside of the gas-liquid contactor is divided into a plurality of regions by partition plates arranged in the vertical direction, and the perforated plate and the frame part are combined with the frame. When and are composed of integrally molded profiles And a tray having an overflow pipe attached to the perforated plate and a liquid receiver is disposed in each of the divided areas, or the trays of a plurality of stages have an overflow pipe and a liquid receiver for each stage. Are alternately arranged, and a supporting frame member acting as a tray gap maintaining member is interposed between the liquid receivers of the upper and lower trays penetrating the overflow pipe, or the perforated plate is A pseudo honeycomb structure is characterized in that a large number of small holes are formed in a flat plate member, a frame member is brazed to its back surface, and a back plate having openings is brazed to the outer edge of the frame member.

[0007]

A perforated plate in which a large number of small holes are formed in the flat plate portion of a shape member in which a flat plate portion and a frame are integrally extruded and formed, or a large number of small holes are formed in a flat plate member and a frame member is formed on the back surface thereof. A pseudo-honeycomb formed by brazing a perforated plate or a flat plate member on which a large number of small holes are formed, a frame member is brazed to the back surface thereof, and a back plate having openings is brazed to the outer edge of the frame member. Since the perforated plate thus constructed has a high rigidity itself, a high-rigidity tray can be easily constructed by combining these.

Further, since the partition plate or the supporting frame member vertically arranged in the gas-liquid contacting device supports the tray and reduces the flexure thereof, it is necessary to reduce the rigidity reinforcement of the members constituting the tray of each stage. You can

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment,
FIG. 1 is a perspective view of a rectification tower of an air separation device, FIG. 2 is a vertical sectional side view of a tray, an overflow pipe, and a liquid receiver configured by using a perforated plate, and FIG. 3 is a partially enlarged view thereof.

In the figure, in the rectification column 1, a perforated plate 21 serving as a base material for constituting a plurality of trays 20, 30, 40, ...
22 ..., 31, 32 ..., 41, 42 ...
a, 22a ..., 31a, 32a ..., 41a, 42a ... As bases, small holes 21b, 22b for ventilation and reinforcing ribs 21c, 22c ... Which function as a framework for obtaining rigidity to suppress out-of-plane deformation. 31c, 32c ..., 41c, 4
2c ... are formed, and the perforated plates 21, 22, ..., 31, 32 are formed.
, 41, 42, and trays 20 in each stage
-40 ... overflow pipes 23, 24, 33, 43, which communicate between the
44 and liquid receivers 25, 34, 35, 45. Flat plate portions 21a, 22a ... and reinforcing rib portions 21c, 22
Each of the perforated plates 21, 22 ... composed of c ... Is composed of a large extruded shape member formed by using an aluminum alloy as a material.
The widthwise dimension of the extruded shape member is set in consideration of the moldability, the assembly dimension as a tray, and the like. For example, as shown in FIG. 2, when two large-sized extruded shape members are used to obtain a certain size of the perforated plates 21, 22 ... Dimension, the extruded shape members are exactly aligned with the dimension. Set the value to Perforated plate 2
The plate thicknesses of the flat plate portions 21a, 22a ...
It is set in consideration of strength, small hole workability, extrusion workability, etc., and the cross-sectional shape, thickness and arrangement pitch of the reinforcing rib portions 21c, 22c ... In cooperation with the plate thickness of the flat plate portions 21a, 22a. It is set so that the required out-of-plane rigidity can be obtained when the perforated plates 21, 22 ... Are assembled as the tray 20 and the extrudability is taken into consideration.

A small hole 21b is formed in the flat plate portion 21a, while avoiding the area where the reinforcing rib portion 21c is arranged, with respect to the shape member in which the flat plate portion 21a and the reinforcing rib portion 21c serving as a frame are integrally extruded and molded. Are perforated to form the perforated plate 21. The small hole 21
For punching b ..., a punching method capable of simultaneously forming a plurality of holes between the reinforcing rib portions is preferable.

A plurality of perforated plates 2 thus formed
2, 22 ... to 41, 42 ... are combined and overflow pipes 23, 24, 33, 43, 4 are combined as shown in FIGS.
4 and the liquid receivers 25, 34, 35, 45 are attached to form a plurality of trays 20 to 40 in the rectification tower 1. When the liquid receiver 25 is arranged at the center of the upper tray 20 and the overflow pipes 23 and 24 are arranged at both edges with the liquid receiver 25 sandwiched between the upper and lower trays 20, the overflow pipe is arranged in the lower tray 30. 23, 2
The liquid receivers 34 and 35 are arranged at both edge portions facing 4 and the overflow pipe 33 is arranged at the central portion. Hereinafter, similarly, the overflow pipe and the liquid receiver are arranged in a zigzag manner to form a vertically opposed multi-stage tray in the rectification column 1.

In the case of a large-capacity air separation device with a large tray, the strength of the tray 30 is reduced due to a decrease in the connecting strength between the side plates 33a and 33b of the overflow pipe 33 in the central portion, and the rigidity of the tray 30 is reduced. It is advisable to reinforce the overflow pipe 33 by connecting the both side plates 33a and 33b with a connecting rib 33c at a position close to the joint position with. Also, the overflow pipes 23, 2 at both edges
By providing similar connecting ribs to 4, 43, 44, ..., It is possible to further reduce the decrease in rigidity.

In the rectification column 1 in which the multistage trays 20 to 40 are installed as described above, a liquid is supplied from above to form a liquid stream 51 flowing down along the trays 20 to 40, and from below. The gas is supplied to form the ascending air current 52, so that the gas-liquid contact is realized and the rectification action is performed.

Such an air separation device has small holes 21b,
22b ... Reinforcing rib portions 21c, 2 functioning as a skeleton
Since the trays 20, 30, 40, ... Can be configured by combining a plurality of perforated plates 21, 22 ..., 41, 42, ... It is possible to manufacture the highly rigid trays 20 to 40 with a small number of assembling steps. In particular, each perforated plate 2
1, 22 ... to 41, 42 ... are formed by setting the shape and dimensions in advance at the stage of extrusion molding in consideration of the size of the rectification column (the tray to be assembled) and the tray shape determined by the liquid flow method. Therefore, even if the size of the apparatus is increased, an increase in manufacturing cost centering on assembly can be suppressed to a minimum.

Next, a second embodiment will be described with reference to FIGS. In this embodiment, the trays at each stage are constructed by combining a pseudo-honeycomb-shaped perforated plate as a base material, and a liquid receiver and an overflow pipe are attached. FIG. 4 is a vertical cross-sectional side view of a multi-stage tray configured in a rectification tower by combining pseudo-honeycomb-shaped perforated plates, FIG. 5 is a partially enlarged view thereof, and FIG. 6 is a partial bottom view of the perforated plate. Each of the pseudo honeycomb-shaped perforated plates 61 and 62, which are combined to form the tray 60, includes the small holes 6 in the plate material.
1a ... Opened flat plates 61b, 62b are combined with rib members 61c, 62c, which serve as a framework for giving rigidity, and back plates 61e, 62e having openings 61d. For this purpose, each member is formed separately, and the joint points 61f and 61g are formed.
A brazing sheet (not shown) is placed on the inside of the machine, and it is brazed in a vacuum furnace to be integrated so as not to fall over.

The pseudo honeycomb perforated plates 61 and 62 thus constructed are combined to form a tray 60 in the rectification column 1, and an overflow pipe 63 and a liquid receiver 64 for communicating the upper and lower trays are provided. A plurality of trays similar to those described above are installed in the rectification column 1.

In the tray 60 constructed by combining a plurality of perforated plates 61 and 62 as described above, since each of the perforated plates 61 and 62 has a highly rigid pseudo-honeycomb shape, the out-of-plane bending rigidity required for the tray is obtained. The rigidity of the whole can be easily obtained. The perforated plates 61, 62 are formed by the rib material 6
The required rigidity can be obtained by the heights of 1c and 62c and the set values of the arrangement pitch. In addition, the perforated plate 6
Numerals 1 and 62 impose dimensional restrictions due to the size of the vacuum furnace for brazing the components, and the size of each perforated plate can be reduced by increasing the number of combined perforated plates that compose each tray. Can be overcome.

Since the tray 60 can be constructed by combining a plurality of perforated plates 61 and 62 in the pseudo-honeycomb shape, which are constructed by integrally brazing the constituent members as described above, the highly rigid tray 60 can be obtained. It can be manufactured with a small number of assembly steps. In particular, each of the perforated plates 61, 62 has its shape at the stage of each member in consideration of the size of the rectification column (the tray to be assembled) and the shape of the tray determined by the liquid flow method, or the size of the vacuum furnace used for brazing. Since it can be configured by setting the dimensions, even if the size of the device is increased, an increase in manufacturing cost centering on assembly can be suppressed to a minimum.

Next, a third embodiment will be described with reference to FIGS. This example is a rectification column in which the inside of the column is divided into two regions on the left and right by a partition plate for reinforcement. FIG. 7 is a vertical sectional side view of a multi-stage tray configured in the rectification column, FIG. 8 is a horizontal cross-sectional plan view of VIII-VIII of FIG. 7, FIG. 9 is a vertical sectional side view of IX-IX of FIG. 7, and FIG. It is a longitudinal cross-sectional enlarged view of a liquid receiving joint.

The reinforcing partition plate 91 for suppressing the vertical deflection of the trays 70, 80 made of plate material in the large-sized rectification tower 1 is provided with communication holes 91a for communicating both sides thereof, and the rectification tower is provided. Perforated plates 71, 72, 81, which are vertically installed in the central portion so as to divide the inside of the container 1 into two, and are installed on both sides of the partition plate 91 so as to form the trays 70, 80 ...
82 ... Plates 71a, 72a, 81a having small holes,
Rib members 71b, 72b, 81b, 82b ... Which function as a frame and reinforce the plate member with high rigidity are joined to the 82a. Both side edges of the partition plate 91 absorb the expansion and contraction due to heat and pressure deformation, and the rectification tower 1 and the partition plate 91.
In order to prevent distortion due to local deformation, the expansion and contraction absorption portions 91a and 91b are formed between the inner wall of the rectification column 1 and the expansion absorption portions 91a and 91b. A liquid receiver 73 is attached to the partition plate 91 at the center of the upper tray 70, and overflow pipes 74 and 75 are attached to both edges of the liquid receiver 73. The component parts of the liquid receiver 73 and the partition plate 91 are joined to the partition plate 91 and L-shaped members 71c and 72c functioning as a skeleton. 73a, 73b are put on and abutted, and welded portions 92a, 92b
It is configured to prevent liquid leakage by welding with.
The tray 80 of the lower stage is provided with liquid receivers 83 and 84 on both edges thereof so as to face the overflow pipes 74 and 75, and an overflow pipe 85 is attached to the center thereof. When the overflow pipe 85 attached to the central portion of the lower tray 80 disconnects the left and right perforated plates 81 and 82 from each other, the rigidity of the lower tray 80 decreases and the amount of bending increases. Therefore, in this embodiment, both side plates 85a and 85b of the overflow pipe 85 and the partition plate 91 are connected by connecting ribs 85c and 85d for reinforcement.

Such an air separation device is provided with the tray 70,
Since 80 are supported by the partition plate 91 in the central portion of the rectification tower 1, the amount of vertical deflection of the trays 70, 80 is greatly reduced, and a large-capacity large-scale apparatus can be accommodated. . In this way, the perforated plates 71, 7 are prevented by performing the flexure prevention measure in which the center part of the tray is supported by the partition plate 91.
2. The number of reinforcing rib members for reinforcing the single body can be reduced, and the perforated plate can be easily manufactured.

Further, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, by supporting the trays of each stage with a supporting frame member arranged between the upper and lower stages of a plurality of trays arranged in the rectification column and maintaining the interval at a predetermined value, The bending is suppressed to be small. Each tray 110, 120, 130, 140 ...
Is the perforated plate 111, 112, 1 similar to the above-mentioned embodiment.
21, 122, 131, 132, 141, 142 ... Overflow pipes 113, 123, 124, 133, 143, 144
... and liquid receivers 114, 115, 125, 134, 135,
145 ... are attached so as to face each other and are configured in the rectification column 1. A plurality of ribs 126, 146 ... Standing from the bottom are provided inside the liquid receivers 125, 145 ... Attached to the central portions of the trays 120, 140, and the tray receivers 127, 147. To be done. The supporting frame member 151 penetrates the overflow pipe 113 of the tray 110 and overlaps with the liquid receiver of the upper tray (not shown) and the rib 1 provided in the liquid receiver 125 of the lower tray 120.
26, the supporting bone member 152 penetrates the overflow pipe 133 of the tray 130 and overlaps with the liquid receiver 125 of the upper tray 120 and the lower tray holder 127 and the lower tray. It is interposed between the ribs 146 provided in the liquid receiver 145 of the tray 140 so as to act as a space holding member. Each supporting bone member 151, 1
52 is composed of a plurality of plate materials arranged side by side at a predetermined interval so as not to obstruct the liquid flow in the overflow pipes 113 and 133, and the side end of each plate material is the inner wall surface of the overflow pipes 113 and 133. To prevent the overflow pipes 113 and 133 from being lowered (deflection of the trays 110 and 130).

The skeleton of the uppermost tray and the lowermost tray is made rigid to increase the rigidity of the tray, and the uppermost tray supports the upward force acting on each tray by the gas pressure, By supporting the downward force exerted by the weight of each tray and the liquid weight in the lowermost tray, the skeleton for ensuring the rigidity of each intermediate tray can be reduced. Also, if the trays of the lowest stage are assembled so that the trays are sequentially stacked, the trays of the respective stages can be assembled while supporting the central portion of the tray by the supporting frame member, so that the assembling work becomes easy.

[0026]

As described above, according to the present invention, a perforated plate in which a large number of small holes are formed in the flat plate portion of a shape member obtained by integrally extruding a flat plate portion and a skeleton, or a large number of flat plate members. A perforated plate formed by forming small holes and brazing a frame member on its back surface, or a back plate having a large number of small holes formed on a flat plate member and brazing a frame member on its back surface and having an opening Since the perforated plate having a pseudo honeycomb structure brazed to the outer edge of the frame member itself has high rigidity, it is possible to easily form a high rigidity tray by combining the perforated plate and the inside of the tower. Since the partition plate or the supporting frame member vertically arranged on the tray supports the tray to reduce the flexure, it is possible to reduce the rigidity reinforcement of the members constituting the trays in each stage and to prevent the flexure of the tray in the tower. To reduce Number of manufacturing steps of b can be suppressed upsizing tower with a large capacity of the apparatus is suppressed from increasing.

[Brief description of drawings]

FIG. 1 is a perspective view of a part of a rectification column of an air separation device according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a part of a tray, an overflow pipe and a liquid receiver of the rectification tower shown in FIG.

FIG. 3 is a partially enlarged view of the tray shown in FIG.

FIG. 4 is a vertical cross-sectional side view of a part of a multi-stage tray that is included in a rectification column of an air separation device according to a second embodiment of the present invention.

5 is a partially enlarged view of the tray shown in FIG.

6 is a partial bottom view of a perforated plate that constitutes the tray shown in FIG. 4. FIG.

FIG. 7 is a vertical cross-sectional side view of a part of the rectification column in the air separation device according to the third embodiment of the present invention.

8 is a sectional view taken along line VIII-VIII of FIG.

9 is a sectional view taken along line IX-IX in FIG. 7.

FIG. 10 is an enlarged vertical sectional view of a partition plate and a liquid receiving joint in the third embodiment.

FIG. 11 is a vertical cross-sectional side view of a part of the rectification column in the air separation device according to the fourth embodiment of the present invention.

[Explanation of symbols]

1 Fractionation tower 20,30,40 Tray 21,22 ..., 31,32 ..., 41, 42 ... Perforated plate 21a, 22a ..., 31a, 32a ..., 41a, 42a
... Flat plate portions 21b, 22b ..., 31b, 32b ..., 41b, 42b
... Small holes 21c, 22c ..., 31c, 32c ..., 41c, 42c
... Reinforcing rib portion 23, 24, 33, 43, 44 ... Overflow pipe 25, 34, 35, 45 ... Liquid receiver

Front page continuation (72) Sumio Okuno 502 Jinritsucho, Tsuchiura-shi, Ibaraki, Institute of Mechanical Research, Hiritsu Seisakusho Co., Ltd. Inside the To Factory (72) Inventor Nobuyoshi Toyonaga 794 Azuma Higashitoyo, Kudamatsu City, Yamaguchi Prefecture Stock Company Hitachi Ltd. Inside the Kasado Factory

Claims (9)

[Claims] 1. A plurality of trays composed of a perforated plate having a large number of small holes, a liquid receiver attached to the trays, and an overflow pipe are internally provided, and liquid is made to flow down along the trays from above. While the gas is raised from below, the gas-liquid contactor for rectifying and separating the components of the gas by bringing the liquid and the gas into contact with each other, the perforated plate integrally extruding the flat plate portion and the skeleton. A gas-liquid contact device, characterized in that a large number of small holes are formed in the flat plate portion of the shaped member. 2. The gas-liquid contact device according to claim 1, wherein the tray is formed by combining a plurality of the perforated plates. 3. A plurality of trays composed of a perforated plate having a large number of small holes, a liquid receiver attached to the trays and an overflow pipe are internally provided, and liquid is made to flow down along the trays from above. In a gas-liquid contactor that raises a gas from below and rectifies the gas by contacting the liquid with the gas to separate the components of the gas, the perforated plate forms a large number of small holes in a flat plate member and A gas-liquid contact device comprising a frame member brazed to the back surface. 4. The gas-liquid contact device according to claim 3, wherein the tray is formed by combining a plurality of the perforated plates. 5. A plurality of trays made of a perforated plate having a large number of small holes, a liquid receiver attached to the trays and an overflow pipe are internally provided, and liquid is flowed down from above along the trays. A gas-liquid contactor that raises a gas from below and rectifies the gas by contacting the liquid with the gas to separate the components of the gas, and a plurality of partition plates are arranged vertically in the gas-liquid contactor. And the tray is provided in each of the divided areas, the tray having the overflow pipe and the liquid receiver attached to the perforated plate is formed by a shape member in which the flat plate portion and the frame are integrally formed. A gas-liquid contact device characterized by being installed. 6. The gas-liquid contact device according to claim 5, wherein the partition plate is provided with a communication hole, and each partition region partitioned by the partition plate communicates with each other. 7. A plurality of trays made of a perforated plate having a large number of small holes, a liquid receiver attached to the trays, and an overflow pipe are provided inside, and liquid is made to flow down along the trays from above. In a gas-liquid contactor in which a gas is raised from below and the liquid and gas are brought into contact with each other to rectify and separate the components of the gas, the plurality of trays include an overflow pipe and a liquid receiver for each tray. The gas-liquid contactor is characterized in that the supporting rib members which are arranged so as to alternate with each other and which penetrate the overflow pipe and act as a tray spacing member between the liquid receivers of the upper and lower trays. 8. The support bone member according to claim 7,
A gas-liquid contact device comprising a plurality of plate members arranged at intervals so as not to obstruct the flow of liquid flowing down the overflow pipe. 9. A multi-tiered tray composed of a perforated plate having a large number of small holes, a liquid receiver attached to the tray, and an overflow pipe are provided internally, and liquid is made to flow down from above along the tray. In a gas-liquid contactor that raises a gas from below and rectifies the gas by contacting the liquid with the gas to separate the components of the gas, the perforated plate forms a large number of small holes in a flat plate member and A gas-liquid contactor characterized in that a skeleton member is brazed to the back surface and a back plate having openings is brazed to the outer edge of the skeleton member to form a pseudo honeycomb structure.