JPH11179102A - Internal heat exchange type distillation column and packing used for it - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To efficiently wet an inner wall of a recovery section while preventing the amount of descending liquid flowing down along the inner wall of the recovery section from becoming too large, and efficiently performing internal heat exchange distillation. Provided are a possible internal heat exchange distillation column and a packing used therefor. SOLUTION: The operation temperature is varied by making a difference in operation pressure by setting the inside of the pipe 4 as a low pressure side and the outside of the pipe 5 as a high pressure side. An internal heat exchange type distillation column in which one distillation column is constituted by transferring heat to the inside of the pipe (recovery section) 4 side, and the recovery section on the inside of the pipe 4 is a packed tower in which packing material is filled. At the same time, a filling material P, which is a combination of a plate filling 22 formed by laminating plate sheets obtained by forming a plate material into a predetermined shape and a mesh filling 32 obtained by forming a highly deformable net material into a predetermined shape, is filled. The mesh filler 32 is filled in at least a part of the space 26 formed between the pipe inner wall 25a and the plate filler 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an internal device comprising a low-pressure column and a high-pressure column, in which heat is transferred from a high-pressure column (concentrating section) to a low-pressure column (recovery section) to exchange heat between the two. The present invention relates to a heat exchange type distillation column.

[0002]

2. Description of the Related Art As a distillation column excellent in energy saving, a low-pressure column and a high-pressure column are provided, and heat exchange is performed between the two columns. There is known an internal heat exchange type distillation column which does not require a heat exchanger. From the standpoint of promoting the energy saving of the distillation operation, this internal heat exchange type distillation column is naturally the ultimate device in principle, and it has been recognized from academia.

[0003] Further, as an internal heat exchange type distillation column, a plurality of tubes are connected to a main body by a tube plate at both ends, so that the inside and outside of the plurality of tubes are isolated inside the main body, and the inside and outside of the tubes are separated. Gas / liquid inlets and outlets are provided outside each pipe, and the operating temperature is made different by making the operating pressure different between the inside and outside of the pipe, and the heat is transferred from the high pressure side to the low pressure side using the pipe walls of multiple pipes as heat transfer surfaces. A structure has been proposed in which one distillation column is constituted by moving the high pressure side as a concentration section and the low pressure side as a recovery section (Japanese Patent No. 2694425).
issue).

When the type of distillation column is a packed column type, it is a recent trend of packed column type distillation columns to employ a structured packing as the packing. In this packed column type distillation column, a portion (distillation section) of the column (tube) filled with the packing material
Is the part where the descending liquid descending from top to bottom and the ascending vapor rising from bottom to top come into contact and the distillation operation is performed.In the distillation section, the descending liquid amount per unit area of the horizontal cross section is uniform. Is desirable, in which case the highest distillation separation efficiency is obtained. Therefore, in the conventional distillation column, it is ideal that the descending liquid flowing down the inner wall of the tube around the packing is the minimum amount.

However, when the column (tube) is filled with the structured packing, when the descending liquid descending on the surface of the packing hits the inner wall of the tube (usually a vertical metal surface) in the distillation section, it continues along the inner wall of the tube. And it is difficult to disperse it again on the packing material side, so that the distillation separation operation cannot be performed efficiently.

Therefore, conventionally, as a filler, for example,
As shown in FIG. 7, the fold 21a is formed by special processing on the plate material.
As shown in FIG. 8, an upper portion 23a is placed on the outer side of a plate-like filler (for example, a column-like filler block) 22 formed by laminating a plurality of plate-like sheets 21 formed into a predetermined shape with Regular packing (hereinafter also simply referred to as “filler”) P (P)
3) is used. The upper part 23a of the collar 23
As an example of a method of making the outside bendable, there is a method of making a plurality of vertical cuts (not shown) in the upper portion 23a of the collar 23 at predetermined intervals in the circumferential direction.

As described above, the upper portion 23a of the collar 23 is bent outward, the filling material P3 is inserted into the tube 25, and the upper portion 23a of the collar 23 is brought into contact with the inner wall 25a of the collar 23, thereby descending down the inner wall 25a of the tube. The liquid can be taken up again on the filling side along the upper part 23a of the collar 23.

However, when the internal heat exchange type distillation column is a packed column type, and the packed column is filled with the structured packing (particularly, the inside of the tube is a low pressure side as a collecting section, and the collecting section is a packed column type. If the conventional structured packing is used as it is, a sufficient distillation separation effect cannot be obtained for the reasons described below.

That is, in the recovery section of the internal heat exchange type distillation column, heat is supplied from the enrichment section via a tube wall (usually a metal wall), and the amount of heat evaporates the descending liquid to generate ascending steam. However, the overall heat transfer coefficient U representing the efficiency of heat transfer at this time is determined by whether the entire heat transfer surface of the recovery unit is wet with the liquid (whether covered with the liquid) or not (ie, not wet). Depends on whether there is a dry portion that is not wet with the liquid), and in order to increase the overall heat transfer coefficient U, it is an essential requirement that the entire heat transfer surface of the recovery unit be surely wet. .

On the other hand, in the recovery section of the internal heat exchange type distillation column, it is desirable that the amount of descending liquid and the amount of rising vapor per unit area of the horizontal cross section are uniform in terms of distillation efficiency. By the way, there is no particular problem because the steam generated in the recovery section due to the heat received from the enrichment section is easily and uniformly dispersed due to the structural characteristics of the structured packing.

However, the descending liquid flows down the inner wall of the pipe in a state where the inner wall of the pipe is completely wet with the minimum liquid thickness, and the descending liquid other than the part flowing down the inner wall of the pipe flows on the surface of the packing material. Is required to be distributed uniformly and lowered, but it has not been easy to achieve this.

That is, the upper part 23 of the collar 23 shown in FIG.
A conventional structured packing P3 in which a is bent outward.
Then, the descending liquid flowing down the inner wall of the pipe is moved to the upper portion 23 of the collar 23.
Since it is taken into the ordered packing P3 again along a,
It becomes difficult to make the inner wall of the pipe completely wet.
It is theoretically possible to adjust the amount of liquid on the inner wall of the tube by devising the structure of the collar (for example, a method in which the lower part of the collar is partially bent outward instead of the entire circumference can be considered). , Actually difficult. Also, when the collar is not bent or when a regular packing without a collar is used, a large amount of descending liquid flows down along the inner wall of the pipe, and the amount of liquid descending on the filling is small. There is a problem that it becomes.

The present invention solves the above-mentioned problem, and it is possible to surely wet the inner wall of the pipe of the recovery unit while preventing the amount of descending liquid flowing down along the inner wall of the pipe from becoming too large. Another object of the present invention is to provide an internal heat exchange type distillation column capable of efficiently performing internal heat exchange type distillation, and a packing used therein.

[0014]

Means for Solving the Problems To achieve the above object, the internal heat exchange type distillation column of the present invention (claim 1) comprises a single tube or a plurality of tubes connected to a main body by a tube plate at both ends. Inside the main body, the inside and outside of a single tube or a plurality of tubes are separated from each other, gas and liquid ports are provided inside and outside the tube, and the inside of the tube is on the low pressure (recovery part) side and the outside of the tube is On the high pressure (concentrating unit) side, the operating temperature is made different by making a difference in the operating pressure, and the wall of a single tube or multiple tubes is used as a heat transfer surface. An internal heat exchange type distillation column that constitutes one distillation column by transferring heat to the inside of the pipe (recovery section), and the recovery section inside the pipe is a packed tower filled with packing material. , A plate-shaped filler obtained by laminating plate-shaped sheets obtained by molding a plate material into a predetermined shape, Using a filler formed by combining a net-shaped filler formed into a predetermined shape with a large shape net material as the filler, at least a part of the void formed between the pipe inner wall and the plate-shaped filler. It is characterized in that it is filled with a net filling.

The collection portion is filled with a filler made by combining a plate-like filler and a mesh-like filler excellent in deformability, and at least a part of the gap between the inner wall of the pipe and the plate-like filler is filled with the mesh-like filler. By filling the filling material, it is possible to prevent a large gap from being formed between the inner wall of the tube and the filling material, and to wet the descending liquid while completely wetting the inner wall of the tube with a liquid amount close to the minimum liquid amount. In addition to allowing the mixture to flow down, the other parts can be evenly dispersed and lowered on the surface of the packing material, and the internal heat exchange distillation can be performed efficiently.

That is, in the internal heat exchange type distillation column of the present invention, since the regularly packed material without using the collar is surely in contact with the inner wall of the pipe over substantially the entire circumference, it flows down on the packed material to flow down the inner wall of the pipe. After the descending liquid that has reached the inner wall of the pipe for a while, it is guided by the packing in contact with the inner wall of the pipe, returns to the top of the packing again, flows down the packing for a while, and reaches the inner wall of the pipe again. It flows down on the inner wall of the pipe. By repeating this, the descending liquid flows down while the entire inner wall of the pipe is wetted with a liquid amount close to the minimum liquid amount, and the liquid on the inner wall of the pipe boils and evaporates by the amount of heat received from the concentrating unit, and the descending liquid And the ascending steam are surely in contact with each other, so that internal heat exchange distillation can be performed efficiently.

Since the mesh filling is excellent in deformability (cushioning property) in a molded state, it is formed slightly larger than the cross-sectional shape of the inside of the pipe, so that when the filler is inserted into the pipe, It is possible to ensure sufficient adhesion with the wall.

Further, the net packing has a limit in the throughput per unit cross-sectional area, and it is necessary to use a plate packing in an industrial-scale internal heat exchange type distillation column. Since the mesh filler and the plate filler are used in combination, the plate filler secures the processing amount per unit cross-sectional area, and the mesh filler secures the adhesion to the pipe inner wall. It can be used for an internal heat exchange type distillation column on an industrial scale.

The internal heat exchange type distillation column according to claim 2 is characterized in that:
The filler is formed by laminating a mesh filler on both the upper and lower surfaces of a plate filler obtained by laminating plate sheets, and a plate filler constituting the filler and The mesh filler is stacked in a direction perpendicular to the axial direction of the pipe to be filled.

For example, as shown in FIG. 6, a sheet 21 made of a pipe (tower) 25 having a circular horizontal cross-sectional shape is formed into a predetermined shape by forming a fold 21a on the plate material by special processing.
Is filled with a plate-like filler 22 formed by stacking two sets of two pieces each having the same length and stacking nine sets each having a different length. Is a point contact at the end of the sheet 21. Therefore, the delivery of the descending liquid between the plate filling 22 and the pipe inner wall 25a is not sufficient, and the pipe inner wall 2 which is a heat receiving surface is not provided.
It cannot be expected that an appropriate amount of liquid is present in 5a.

Further, as shown in FIG.
Is formed between the inner wall 25a of the tube, which is the heat receiving surface, and the plate-shaped filler 22 without any filler. In the gap 26, the descending liquid and the rising vapor pass through without contact, and the distillation separation action is not exerted. Therefore, the distillation efficiency is reduced by that much. In particular, at the end of the plate-like sheet 21 constituting the plate-like filling 22 near the upper surface and the lower surface, the gap 26 between the plate-like sheet 21 and the pipe inner wall 25a is large.

On the other hand, in the internal heat exchange type distillation column according to the second aspect of the present invention, as shown in FIG.
A filler (P1) formed by laminating a mesh filler 32 formed by laminating a mesh sheet 31 is used. In addition, the filling P1 is such that the plate sheet 21 constituting the plate filling 22 and the mesh sheet 31 constituting the mesh filling 32 are vertical (that is, parallel to the axial direction of the pipe 25). As shown), the mesh filler 32 inserted in the tube 25 and laminated on both the upper and lower surfaces of the plate filler 22 is
Since it is excellent in deformability (cushioning property), as shown in FIG.
Since the mesh filling 32 is deformed and closely adheres to the tube inner wall 25a, only a small gap 26 is formed only between the end of the plate-like packing 22 at the center and the tube inner wall 25a. Therefore, the descending liquid and the ascending vapor can be uniformly and surely brought into contact with each other, and the inner wall of the tube can be wetted with an appropriate amount of liquid, so that the distillation separation operation can be performed efficiently.

Further, the internal heat exchange type distillation column according to claim 3 comprises:
The filling material is formed into a mesh having a large deformability in a predetermined shape so as to cover the periphery of the plate-like filler formed by laminating the sheet-like sheets in a direction orthogonal to the axial direction of the pipe in which the filler is to be filled. It is characterized by being formed by arranging a net-like filler formed in the above.

When the filler is formed by arranging the mesh filler so as to cover the periphery of the plate filler, the mesh filler disposed around the plate filler becomes deformable ( It is excellent in cushioning property) and deforms when it is inserted into the pipe and closely adheres to the pipe inner wall, so that a large void is prevented from being formed between the end of the plate-shaped filler and the pipe inner wall, It is possible to wet the inner wall of the tube with an appropriate amount of liquid and to make the descending liquid and the ascending vapor uniformly and surely contact with each other, so that the distillation separation operation can be performed efficiently.

Further, the internal heat exchange type distillation column according to claim 4 comprises:
Along with disposing a net-shaped filler formed by molding a highly deformable net material into a predetermined shape so as to cover the periphery of the plate-shaped filler,
A void formed between the plate-like filler and the mesh-like filler is filled with a deformable filler.

When the gap between the plate-shaped filler and the mesh filler disposed so as to cover the periphery thereof is filled with a deformable filler, the end of the plate-shaped filler and the inside of the pipe are filled. While it is possible to prevent a large void from being formed between the walls, it is possible to prevent a small void from being formed between the plate-filled material and the mesh-filled material,
It is possible to wet the inner wall of the pipe with an appropriate amount of liquid, and to make the descending liquid and the rising vapor more efficiently contact each other.

Further, the internal heat exchange type distillation column according to claim 5 is characterized in that:
A plurality of the packings are stacked and filled in the axial direction of the tube, and the packings adjacent to each other are stacked in a state of being rotated by 90 ° with respect to each other as viewed from the axial direction of the tube. Features.

By stacking adjacent packings in a state where they are rotated by 90 ° with respect to each other when viewed from the axial direction of the pipe, when the gap between each packing and the inner wall of the pipe has a certain directionality, By eliminating the directionality, it is possible to prevent the generation of a continuous gap in the axial direction of the pipe, and it is possible to wet the inner wall of the pipe with an appropriate amount of liquid, and to uniformly and uniformly lower the descending liquid and the rising steam. It is possible to contact securely,
The distillation separation operation can be performed efficiently.

The packing material according to claim 6 of the present invention is a packing material used for the above-mentioned internal heat exchange type distillation column of the present invention, and is formed by laminating plate-like sheets obtained by forming plate materials into a predetermined shape. It is formed by laminating a mesh filler formed by molding a highly deformable mesh material into a predetermined shape on both upper and lower surfaces of the plate filler, and the plate filler and the mesh filler are formed by laminating the mesh filler. Are stacked in a direction orthogonal to the axial direction of the tube to be filled.

The filling material according to claim 7 of the present invention is provided around a plate-like filler formed by laminating plate-like sheets obtained by molding plate materials into a predetermined shape in a direction orthogonal to the axial direction of the pipe to be filled. Is formed by arranging a mesh filler formed by shaping a highly deformable mesh material into a predetermined shape so as to cover the mesh material.

By using the packing of claim 6 and claim 7, it is possible to reliably form an internal heat exchange type distillation column without a large gap between the inner wall of the tube and the packing.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described, and features thereof will be described in more detail.

[Embodiment 1] FIG. 3A is a front sectional view showing an internal heat exchange type distillation column according to one embodiment of the present invention, and FIG. 3B is a sectional view taken along the line IIIb-IIIb.

The internal heat exchange type distillation column (structure constituting it) comprises a main body 1 and a plurality of tubes 2 inserted into the main body 1.
5 is formed by connecting the main body 1 with both end tube sheets (upper tube sheet 3a and lower tube sheet 3b), and the inside (collection unit) 4 and the outside tube (concentration unit) 5 of the plurality of tubes 25 are formed. It has an isolated structure. The inside of the pipe (recovery section) 4 is filled with the ordered packing, and the outside of the pipe (concentration section) is also filled with the ordered packing.

In the upper part of the main body 1, a liquid inlet 6 for supplying a liquid to the outside of the tube (concentration unit) 5, and a vapor outlet 7 for the condensation unit for extracting vapor from the outside of the tube (concentration unit) 5. Is disposed inside the pipe (recovery section) above the upper pipe sheet 3a.
A recovery section liquid inlet 8 for supplying liquid to the inside of the pipe (recovery section) 4 is provided in the end chamber 14 a communicating with the pipe 4, and a recovery section steam outlet for extracting vapor from the inside of the pipe (collection section) 4. 9 are provided.

On the other hand, in the lower part of the main body 1, a vapor inlet 10 for supplying the vapor to the outside (concentrating unit) 5 of the tube, and a liquid outlet 11 for the condensing unit for extracting the liquid from the outside (concentrating unit) 5. A recovery section steam inlet 12 for supplying steam to the inside of the pipe (recovery section) 4 is provided in an end chamber 14b below the lower tube sheet 3b and communicating with the inside of the pipe (recovery section) 4. Is arranged,
In addition, a recovery section liquid outlet 13 for extracting the liquid from the inside of the pipe (recovery section) 4 is provided.

In the internal heat exchange type distillation column of this embodiment, the inside of the tube 4 is placed in a plurality of tubes 25 serving as a recovery section.
As shown in FIG. 1, a fold 21a is formed on the plate material by special processing.
The plate sheet 21 formed into a predetermined shape by attaching to the upper and lower surfaces of a plate-like filler 22 formed by stacking two sheets of the same length into two sets and stacking five sets of different lengths. A mesh filler 32 formed by stacking two specially processed mesh sheets 31 each having the same length and having the same length, and stacking five sets each having a different length.
Is filled with the filler P (P1) formed by laminating. Note that the filler P1 is inserted into the pipe 25 in such a manner that each of the plate sheets 21 and the mesh sheet 31 constituting the plate filler 22 and the mesh filler 32 are vertical.

The filler P1 is a plate-like filler 2
2 is excellent in deformability (cushioning property) and is slightly larger than the inner cross-sectional shape of the pipe as shown in FIG. When inserted into the inside 25, the mesh filling 32 is deformed and closely adheres to the pipe inner wall 25a, and the filling P1 and the pipe inner wall 25a
And there is almost no gap between them, and the plate filling 2 in the center
The gap 26 is slightly present only between the end portion 2 and the pipe inner wall 25a.

Therefore, the inner wall 25a of the pipe can be wetted with an appropriate amount of liquid, and the descending liquid and the ascending vapor can be uniformly and surely brought into contact with each other in the recovery section, so that the distillation separation operation can be performed efficiently. It becomes possible.

In the case where the filling material P1 is filled in the pipe 25, as shown in FIG.
Are stacked and filled in the axial direction of the tube 25, and the adjacent packings P1 are separated from each other by 90
場合 If you stack them in a rotated state,
As schematically shown in (b), it is possible to prevent the generation of a continuous gap in the axial direction of the pipe 25, and to wet the inner wall 25a of the pipe with an appropriate amount of liquid, and to make the descending liquid and the ascending vapor uniform. In addition, it is possible to efficiently perform the distillation separation operation by making sure of the contact. FIG. 4B shows a state in which the gap 26a of one packing P1 and the gap 26b of the other packing P1 adjacent to each other are not continuous (not overlapped) in the axial direction of the tube 25. .

As described above, the adjacent fillers are stacked while being rotated by 90 ° with respect to each other when viewed from the axial direction of the pipe, so that the gap between each filler and the inner wall of the pipe has a certain direction. In this case, the directionality can be eliminated, and the generation of a continuous gap in the axial direction of the tube can be prevented.

[Embodiment 2] FIG. 5 is a sectional plan view showing the structure of a main part (recovery part) of an internal heat exchange type distillation column according to another embodiment of the present invention. In this embodiment, as the filling material of the collecting section, special processing is performed, and the fold 21
The plate sheet 21 provided with a is made of a pair of two sheets having the same length, and a sheet filler 22 formed by stacking eight sets of sheets having different lengths is specially processed and creased. 31a (mesh filling 3)
The filler P (P2) formed by covering in 2) is used. Note that the mesh sheet 31 is divided in half and vertically.
The two mesh sheets 31, 31 are appropriately spot-welded at the ends where they come into contact with each other.

In the packing P2, the gap 26 between the both ends of the central ten sheet sheets 21 and the mesh sheet 31 is not so large and is left as it is without any particular treatment.

Then, the plate sheet 2 to be the upper and lower outermost layers
The substantially fan-shaped space 26 (26c) between the mesh sheet 1 (21b) and the mesh sheet 31 (mesh filling 32) is filled by filling a plurality of mesh sheets 33 having deformability.

The gaps 26 (26d) between both ends of the remaining sheet 21 and the mesh sheet 31 are filled by filling a separately prepared mesh-like deformable cylindrical filler 34. Have been. FIG. 5 shows a state in which the cylindrical filler 34 is deformed when covering the periphery of the plate filler 22 with the mesh sheet 31 (the mesh filler 32) to close the gap 26d. .

In the packing P2 used in this embodiment, the plate-like packing 22 is arranged so that the positions of the joints of the vertically-divided net-like packing 32 are rotated by 90 °, for example. It is also possible to change the positional relationship between the net filling 32 and the mesh filling 32.

As in the second embodiment, the plate-like filler 22
A mesh sheet (mesh filler 32) is disposed so as to cover the periphery of the sheet, and a mesh sheet 33 or a cylindrical filler 34 having deformability between the plate filler 22 and the mesh sheet 31.
By inserting and arranging, between the filler and the pipe inner wall,
It is possible to reliably prevent a void from being formed inside the filling or the like.

The filler P2 is a plate-like filler having a large processing capacity in a portion that occupies most of the area of the horizontal cross section. Therefore, there is no problem in the processing capacity. The transfer of the descending liquid to and from P2 is carried out smoothly, and it is possible to prevent the inner wall 25a of the pipe from being depleted to produce a dry portion or to make the liquid film thickness too large, thereby performing the distillation separation operation efficiently. be able to.

The present invention is not limited to the above-described embodiment in other respects as well, and the number of laminated sheet sheets constituting the plate-like filler, and the specific examples of the plate-like filler and the net-like filler are not limited. With respect to the configuration and the like, various applications and modifications can be made within the scope of the invention.

[0050]

As described above, in the internal heat exchange type distillation column of the present invention, the recovery part is filled with a packing made of a combination of a plate packing and a mesh packing excellent in deformability. By ensuring that at least a part of the gap between the wall and the plate filler is filled with the mesh filler, it is possible to prevent a large void from being formed between the inner wall of the pipe and the filler, and to minimize the gap. The descent liquid flows down while wetting the inner wall of the pipe with a liquid volume close to the liquid volume, and the other parts can be evenly dispersed and lowered on the surface of the packing, allowing efficient internal heat exchange Distillation can be performed.

Further, the mesh filler is excellent in deformability (cushioning property) in a molded state, and is formed slightly larger than the cross-sectional shape of the inside of the pipe, so that when this is inserted into the pipe, the inner wall of the pipe is formed. And the adhesiveness with the adhesive can be improved.

Also, the net packing has a limit in the throughput per unit cross-sectional area, and it is necessary to use a plate packing in an industrial-scale internal heat exchange type distillation column. Since the mesh filler and the plate filler are used in combination, the plate filler secures the processing amount per unit cross-sectional area, and the mesh filler secures the adhesion to the pipe inner wall. It can be used for an internal heat exchange type distillation column on an industrial scale.

Further, as in the internal heat exchange type distillation column according to the second aspect, a packing formed by laminating a net-like packing on both upper and lower sides of a plate-like packing obtained by laminating a sheet-like sheet. When a material is used, it is possible to efficiently utilize the deformability of the mesh filler, and to prevent a large void from being formed between the end of the central plate filler and the pipe inner wall. Thus, the descending liquid and the ascending vapor can be brought into uniform and reliable contact, and the distillation separation operation can be performed efficiently.

Further, in the case where the packing is formed by disposing the mesh packing so as to cover the periphery of the plate packing as in the internal heat exchange type distillation column of the third aspect. ,
The mesh filler disposed around the plate-filled material has excellent deformability (cushioning properties), and is deformed and adheres to the inner wall of the pipe. Therefore, a large gap is formed between the plate-filled material and the inner wall of the pipe. Is formed, the inner wall of the tube is wetted with an appropriate amount of liquid, and the descending liquid and the ascending vapor can be uniformly and surely brought into contact with each other, so that the distillation separation operation can be performed efficiently. .

Further, as in the internal heat exchange type distillation column according to claim 4, the space between the plate-like packing and the mesh packing disposed so as to cover the periphery thereof is filled with a deformable packing. When it is made to fill by, while preventing that a large space | gap is formed between the edge part of a plate-shaped filler and a pipe inner wall, a small space | gap is formed between a plate-shaped filler and a mesh-shaped filler. This makes it possible to wet the inner wall of the pipe with an appropriate amount of liquid and to make the descending liquid and the ascending vapor more efficiently contact each other.

Further, like the internal heat exchange type distillation column according to claim 5, adjacent packings are separated from each other when viewed from the axial direction of the tube.
When stacking in a state of 0 ° rotation, if the gap between each filling material and the inner wall of the pipe has a certain directionality, the directionality is canceled and the gap continuous in the axial direction of the pipe. Can be prevented, and the inner wall of the pipe can be wetted with an appropriate amount of liquid, and the descending liquid and the rising vapor can be uniformly and reliably contacted,
The distillation separation operation can be performed efficiently.

The filler according to claim 6 of the present application is formed by laminating a net-like filler formed by shaping a highly deformable net into a predetermined shape on both upper and lower sides of the plate-like filler. Further, the filler according to claim 7 is arranged such that a net-like filler formed by molding a highly deformable net material into a predetermined shape is disposed around a laminate formed by laminating plate-like fillers. Because
By using such a packing, there is no large gap between the inner wall of the tube and the packing, and it is possible to reliably constitute the internal heat exchange type distillation column of the present invention having desired distillation separation characteristics.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view showing a configuration of a main part (a recovery part) of an internal heat exchange type distillation column according to an embodiment of the present invention.

FIG. 2 is a diagram showing a main part of a packing used in an internal heat exchange type distillation column according to an embodiment of the present invention.

FIG. 3 is a view showing an internal heat exchange type distillation column according to one embodiment of the present invention, wherein (a) is a front sectional view and (b) is II of (a).
It is an Ib-IIIb line sectional view.

FIG. 4 is a view showing a configuration of a recovery section of an internal heat exchange type distillation column according to one embodiment of the present invention, wherein (a) is a front sectional view,
(b) is a sectional plan view showing a main part.

FIG. 5 is a plan sectional view showing a configuration of a main part (recovery part) of an internal heat exchange type distillation column according to another embodiment of the present invention.

FIG. 6 is a sectional plan view showing a conventional distillation column packed with a structured packing.

FIG. 7 is a view schematically showing a conventional structured packing.

FIG. 8 is a cross-sectional view showing a state where a tube is filled with a conventional structured packing (filling block).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body body 3a Upper tube sheet 3b Lower tube sheet 4 Inside of pipe (recovery part) 5 Outside of pipe (concentration part) 6 Concentration part liquid inlet 7 Concentration part vapor outlet 8 Recovery part liquid inlet 9 Recovery part vapor outlet 10 Concentration part vapor inlet DESCRIPTION OF SYMBOLS 11 Concentration part liquid outlet 12 Recovery part vapor inlet 13 Recovery part liquid outlet 14a, 14b End chamber 21 Sheet 21a Sheet fold 21b Sheets on both upper and lower sides 22 Sheet filler 25 Tubes (multiple tubes) 25a Tube inner wall 26, 26a, 26b Gap 26c Approximately fan-shaped gap 26d Gap between both ends of plate sheet and net sheet 31 Net sheet 31a Crease of net sheet 32 Net filling 33 Net sheet 34 Cylindrical Filling material P, P1, P2 Filling material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshinari Nakanishi 2-1-2, Kuse-Terashima, Amagasaki City, Hyogo Prefecture Inside Kimura Kakoki Co., Ltd. 7 Kansai Kagaku Kikai Seisakusho Co., Ltd. (72) Inventor ▲ Yasu ▼ 2-25-10 Hatchobori, Chuo-ku, Tokyo Maruzen Petrochemical Co., Ltd.

Claims (7)

[Claims] 1. A structure in which a single pipe or a plurality of pipes is connected to a main body by means of a tube plate at both ends, so that the inside of the main body is separated from the inside of the single pipe or the plurality of pipes. A gas / liquid inlet / outlet is provided for each of the pipes, the inside of the pipe is set to the low pressure (recovery section) side, and the outside of the pipe is set to the high pressure (concentration section) side. An internal heat exchange type distillation column that constitutes one distillation column by transferring heat from the outside (concentration section) side of the high pressure side pipe to the inside (recovery section) side of the low pressure side pipe with the pipe wall as a heat transfer surface. The collection section inside the pipe is a packed tower filled with packing material, and a plate-shaped packing material obtained by laminating plate-shaped sheets obtained by forming plate materials into a predetermined shape; The filler obtained by combining a mesh filler molded into a predetermined shape is Used as Hamabutsu, heat integrated distillation column nets made packings, characterized in that it has to be filled in at least part of the gap formed between the inner wall and the plate made packing. 2. The filler is formed by laminating a net-like filler on both upper and lower sides of a plate-like filler obtained by laminating plate-like sheets, and constitutes the filler. 2. The internal heat exchange type distillation column according to claim 1, wherein the plate packing and the mesh packing are stacked in a direction orthogonal to an axial direction of a tube to be filled with the packing. 3. A highly deformable mesh so that the filler covers a perimeter of a plate-like filler formed by laminating plate-like sheets in a direction orthogonal to an axial direction of a pipe into which the filler is to be filled. 2. The internal heat exchange type distillation column according to claim 1, wherein the internal heat exchange type distillation column is formed by arranging a net-like packing formed by molding a material into a predetermined shape. 4. The internal heat exchange type distillation column according to claim 3, wherein a void formed between said plate-shaped packing and said mesh-shaped packing is filled with a deformable packing. . 5. A plurality of the packings are stacked and filled in the axial direction of the pipe, and the packings adjacent to each other are stacked while being rotated by 90 ° with respect to each other as viewed from the axial direction of the pipe. The internal heat exchange type distillation column according to claim 2, wherein: 6. A packing material for use in an internal heat exchange type distillation column according to claim 1, 2 or 5, wherein the plate material is formed by laminating plate sheets obtained by forming plate materials into a predetermined shape. It is formed by laminating a mesh filler obtained by molding a highly deformable mesh material into a predetermined shape on the upper and lower surfaces, and the plate filler and the mesh filler are to be filled. A packing characterized by being laminated in a direction perpendicular to the axial direction of a tube. 7. A packing for use in an internal heat exchange type distillation column according to claim 1, wherein the plate material has a predetermined shape in a direction orthogonal to an axial direction of a pipe to be packed. Formed by arranging a net-like filler formed by molding a highly deformable net material into a predetermined shape so as to cover the periphery of the plate-like filler formed by laminating the sheet-like sheets molded into A packing characterized by the following.