JPH11179101A - Internal heat exchange type distillation column and packing used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internal heat exchange type distillation column in which packings are filled so that a large void is not formed in a concentration part and liquid amount flowing down along the outer wall of a tube is made proper amount and distillation by internal heat exchange is efficiently performed, and provide packings therefor which are filled so as to be surely stuck to the outer walls of a plurality of tubes. SOLUTION: In the packed tower, a plurality of tubes 25 are triangularly arranged and the outsides 5 of the tubes are formed to be a concentration part. Packings (partitioned packings) 31 having a plane shape corresponding to each partitioned region S1 are filled respectively in the outer peripheral part of three mutually adjacent tubes (25a, 25b and 25c) (three pieces of tube unit U1), in which an equilateral triangle is formed with lines A, B and C formed by connecting the centers in a planar view and filled in a plurality of regions (partitioned regions) S1 partitioned by the lines A, B and C forming the equilateral triangle 27.

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).

As the type of the internal heat exchange type distillation column, a packed column type packed with structured packing is adopted, and the inside of the tube is on the low pressure (recovery section) side, and the outside of the tube is on the high pressure (concentration section) side. Is often advantageous. In this packed column distillation column, the portion (distillation section) of the column (tube) filled with the packing is contacted with a descending liquid descending from top to bottom and a rising vapor rising from bottom to top, so that the distillation operation is performed. In the distillation section, it is desirable that the descending liquid amount per unit area of the horizontal section is uniform, and in this case, the highest distillation separation efficiency can be obtained.

[0005] By the way, when the outside of the tube, which is the enrichment section, is used as a packed tower, there is no void in which the packing is not filled in the planar sectional shape of the tower, or even if it is present, the ratio to the planar sectional area is small. Negligible, or have been treated to prevent short-circuiting (channeling) of rising steam, and have the function of reliably returning the descending liquid on the outer wall surface of the pipe to the packing side (ie, At the outside of the tube (concentration part), the rising vapor condenses on the outer wall of the tube to form a descending liquid, so the descending liquid quickly moves to the packing side and the outer surface of the tube is dry, or the outer surface of the tube descends. It is important that the amount of the liquid to be removed is as small as possible).

As a method for satisfying the above two requirements, for example, a sheet material obtained by laminating a plurality of sheet sheets formed by folding a sheet material into a predetermined shape by performing a special process, There is a method of inserting a regular packing (hereinafter, also simply referred to as “filler”) around which a collar (band) whose upper part is bendable outward is wound. In addition, as a method to be able to bend the upper part of the collar outward,
For example, a method is conceivable in which a plurality of vertical cuts are formed at predetermined intervals in the circumferential direction at the top of the collar. If the filler can be filled in such a manner that the upper part of the collar is pressed against the outer wall (outer pipe wall) of the pipe (plural pipes), the descending liquid flowing down on the outer wall of the pipe is guided by the collar to the filler side. Thus, it can be dispersed again on the packing.

However, in order to wind the collar around the filler, there is a problem that the collar cannot be actually manufactured unless the portion is the outer peripheral surface of one filler. That is, when this is applied to the outer shape of the pipe, the problem that the packing surface in contact with the outer wall of the pipe cannot become the outer circumference of one packing unless the outer circumference of the plurality of pipes is divided at any position. There is a point.

[0008] As another method for satisfying the above two requirements, a filler is disposed on the outside of the pipe so as to be in close contact with the outer wall of the pipe, and the descending liquid flowing down the outer wall of the pipe is efficiently discharged to the side of the filler. However, the plan sectional shape of the tower in which multiple pipes are arranged inside the main body is extremely complicated, and packing with accurate dimensions and shape is required to adhere to the outer wall of the multiple pipes. The fact is that it is practically difficult to manufacture and to arrange it in such a manner that it is in close contact with the outer wall of a plurality of tubes.

[0009] The present invention solves the above-mentioned problems, and the filling portion is filled so as not to generate a large void in the concentrating portion, and the amount of liquid flowing down the outer wall of the tube can be made an appropriate amount. To provide an internal heat exchange distillation column capable of efficiently performing internal heat exchange distillation, and a packing material used for the internal heat exchange distillation column, which can be packed so as to be surely adhered to the outer wall of a plurality of tubes. With the goal.

[0010]

In order to achieve the above object, the internal heat exchange type distillation column of the present invention (claim 1) has a structure in which a plurality of tubes are connected to the main body by means of a tube plate at both ends, whereby the main body is connected to the main body. Inside, the inside and outside of the pipes are separated from each other. Gas and liquid ports are provided inside and outside the pipe. The inside of the pipe is on the low pressure (recovery section) side, and the outside of the pipe is on the high pressure (concentration section) side. The operating temperature is varied by making the operating pressure different, and the heat is transferred from the outside of the high-pressure side pipe (concentration section) to the inside of the low-pressure side pipe (recovery section) using the pipe walls of multiple pipes as heat transfer surfaces. It is an internal heat exchange type distillation column which constitutes one distillation column by moving, the arrangement of the plurality of tubes is a triangular array, the enrichment section on the outside of the tube is a packed column, and viewed in plan. In this case, three tubes adjacent to each other (3) whose center connecting lines form a substantially equilateral triangle The outer periphery of the tube unit) and the plurality of regions (partitioned regions) defined by the lines forming the substantially equilateral triangle are each filled with a filler (split filler) having a planar shape corresponding to each of the divided regions. It is characterized by being.

[0011] An outer peripheral portion of the three-tube unit and a plurality of regions (partitioned regions) defined by lines forming a substantially equilateral triangle are each filled with a filler having a planar shape corresponding to each of the divided regions. In this case, since the shape of each partitioned area becomes the same, only one kind of packing (divided packing) of the same shape is prepared, and the pipe is easily and surely brought into close contact with the outer wall of the pipe. It becomes possible to fill the outside with a filler.

Further, the internal heat exchange type distillation column according to claim 2 is characterized in that:
By connecting the plurality of pipes to the main body by means of the pipe plates at both ends, the inside of the main body has a structure in which the inside and outside of the plurality of pipes are separated, and a gas-liquid inlet and outlet are provided inside and outside the pipe, respectively. The inside is on the low pressure (recovery section) side, and the outside of the pipe is on the high pressure (concentration section) side. The operating temperature is made different by differentiating the operating pressure. From the (concentration unit) side to the low pressure side tube (recovery unit)
An internal heat exchange type distillation column configured as one distillation column by heat transfer to the side, wherein the arrangement of the plurality of tubes is a square array, the enrichment section outside the tubes is a packed column, planar When viewed from above, the outer peripheral portions of four pipes (four-tube unit) facing and adjacent to each other, the lines connecting the centers forming a substantially square, and a plurality of regions ( Each of the divided regions is filled with a filler (split filler) having a planar shape corresponding to each of the divided regions.

An outer peripheral portion of the four-tube unit and a plurality of regions (partitioned regions) defined by lines forming a substantially square.
Is filled with a filler having a planar shape corresponding to each of the divided regions, the shape of each of the divided regions is the same as in the case of the above-mentioned claim 1, so that the same shape By simply preparing one type of packing (divided packing), it is possible to easily and reliably fill the outside of the tube with the packing so as to be in close contact with the outer wall of the tube.

Further, the internal heat exchange type distillation column according to claim 3 comprises:
The divided region is filled with a filling material by filling a plurality of filling blocks in which a plurality of the divided filling materials are integrally formed.

When a packing block in which a plurality of divided packings are integrally formed is used, the number of packings to be filled is reduced, so that packing can be performed efficiently.
In addition, if a large number of divided packings are integrated, the manufacture of the packing block becomes complicated on the contrary, it is necessary to prepare a plurality of packings having different shapes, or the filling work is rather difficult Therefore, it is preferable that the degree of integration of the divided packing materials is determined in consideration of various conditions such as the diameters and intervals of the plurality of pipes.

The internal heat exchange type distillation column according to claim 4 is characterized in that:
A gap formed between the inner wall of the main body and the portion of the plurality of tubes facing the main body is filled with a filler other than the filler (divided filler).

The space formed between the inner wall of the main body and the portion of the plurality of pipes facing the main body is filled with a filling material other than the divided filling material, which is suitable for the shape of the space. , It is possible to efficiently fill the entire outside of the tube with the filler, and the present invention can be made more effective.

The packing of the present invention (claim 5) has a structure in which a plurality of tubes in a triangular arrangement are connected to the main body by means of a tube plate at both ends so that the inside and outside of the plurality of tubes are isolated. A filling material used when filling the filling material outside the plurality of tubes in the main body, three lines adjacent to each other, the lines connecting the centers form a substantially equilateral triangle when viewed in a plan view A planar shape corresponding to the outer peripheral portion of the pipe (three-tube unit) and a plurality of regions (partitioned regions) defined by lines forming the substantially equilateral triangle, or a planar shape in which a plurality of the divided regions are connected Is formed so as to have the following.

The packing has the outer peripheral portions of three adjacent pipes (three-tube unit) whose lines connecting the centers form a substantially equilateral triangle when viewed in a plan view, and the above-described substantially equilateral triangle. Is divided and formed so as to have a planar shape corresponding to a plurality of regions (partitioned regions) partitioned by a line.
By simply preparing a predetermined number of the same type of packing, it is possible to easily and reliably configure an internal heat exchange distillation column in which the packing is filled outside the tube in such a manner as to be in close contact with the outer wall of the tube. . Further, when the filler has a planar shape in which a plurality of partitioned areas are connected, the number of fillers to be filled can be reduced, and efficient filling can be performed. In addition, if too many divided packings are integrated, the manufacture of the packing block becomes rather complicated, or it becomes necessary to prepare a plurality of packings having different shapes, or the filling work becomes rather difficult. In some cases, the degree of integration of the divided packing materials is preferably determined in consideration of the diameters, intervals, and the like of the plurality of pipes, as in the case of claim 3 described above.

The packing of the present invention (Claim 6) has a structure in which the inside and outside of the plurality of tubes are isolated by connecting a plurality of tubes in a square array to the main body by means of a tube plate at both ends. A filling material used to fill the outside of a plurality of pipes in the main body), wherein lines connecting the centers form a substantially square shape when viewed in a plan view, and are opposed to and adjacent to each other. A plurality of regions (partitioned regions) divided by the outer peripheral portion of a main tube (four-tube unit) and the line forming the substantially square
Or a divided shape having a planar shape corresponding to a plurality of the divided regions.

This packing forms a substantially square shape with the outer peripheral portions of four tubes (four-tube unit) opposed to each other and adjacent to each other, the lines connecting the centers when viewed in a plan view form a substantially square shape. Since it is divided and formed so as to have a planar shape corresponding to a plurality of regions (partitioned regions) partitioned by lines, it is easy and sure to adhere to the outer wall of the pipe simply by preparing a predetermined number of the same type of filler. In this manner, it is possible to configure an internal heat exchange type distillation column in which the packing is filled outside the tube. Further, when the filler has a planar shape in which a plurality of partitioned areas are connected, the number of fillers to be filled can be reduced, and efficient filling can be performed.

[0022]

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. 2 is a front sectional view showing a schematic configuration of an internal heat exchange type distillation column according to one embodiment of the present invention.

The internal heat exchange type distillation column (structure constituting it) includes 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 outside of the tube (concentrating unit) is filled with the ordered packing, and the inside of the tube (recovering unit) 4 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 the first embodiment, the plurality of tubes 25 are arranged in a triangular arrangement as shown in FIG. Lines X, Y, and Z connecting the centers A, B, and C of the tubes 25 (25a, 25b, 25c) (three-tube unit U1) are arranged to form an equilateral triangle 27.

Then, in this internal heat exchange type distillation column, each of the tubes 25a, 25 constituting the three-tube unit U1.
b, 25c and a plurality of regions (partitioned regions) S defined by lines X, Y, Z forming the equilateral triangle 27
1 are filled with fillers (divided fillers) 31, 31,... Having a planar shape corresponding to each of the divided areas S1 (that is, the divided areas within the range surrounded by the thick line L1 in FIG. 1). S1 (hatched portion) is filled with the divided filler 31). In addition, as the divided filling material 31, a plate-like filling material (ordered filling material) obtained by laminating a plurality of plate-like sheets formed by folding a plate material into a predetermined shape by special processing was used. However, the divided filling material 31 is not limited to this, and it is possible to use a filling material made of a net obtained by shaping a net material into a predetermined shape and other various types of filling materials.

Also, the inner wall 1a of the main body 1 and a plurality of tubes 25
The space 29 formed between the portions facing the main body 1 is filled with a filler 32 different from the divided filler 31 and corresponding to the shape of the space 29. In addition, this filling 3
It is desirable to provide a collar on the portion of the body 2 facing the inner wall 1a of the main body 1 and the outer wall 26 of the plurality of tubes 25. However, by forming the filler 32 separately, the portion where the collar is to be provided is filled with the filler. Since the outer peripheral surface is provided, the collar can be easily attached. In the first embodiment, as the filler 32, a plate-like filler (ordered filler) obtained by laminating a plurality of plate-like sheets formed by folding a plate material into a predetermined shape by special processing is used. However, the filler 32 is not limited to this, and a mesh filler formed by shaping a net material into a predetermined shape and other various types of fillers can be used.

In the internal heat exchange type distillation column according to the first embodiment, as described above, each divided area S1 having the same planar shape is used.
Since the divided filling material 31 is filled with a single filling material of the same shape (divided filling material), it is possible to easily and surely adhere to the outer wall 26 of the plurality of tubes 25 simply by preparing the same kind of filling material (divided filling material). In this manner, the outer tube 5 can be filled with the filler. A gap 29 formed between the inner wall 1a of the main body 1 and a portion of the plurality of tubes 25 facing the main body 1 has a filling 32 corresponding to the shape of the gap 29, which is different from the divided filling 31. Since the filler 32 can be provided with a collar, it is formed between the inner wall 1a of the main body 1 and the portion of the plurality of tubes 25 facing the main body 1. The gap 29 can be reliably filled.

In the first embodiment, the divided area S1
Although the case where the divided filling material 31 having the planar shape corresponding to the above is used has been described, it is also possible to use a filling block having a planar shape in which a plurality of the divided areas S1 are connected. It is possible to reduce the number of fillers to be filled and to perform efficient filling.

[Embodiment 2] FIG. 3 is a cross-sectional plan view showing the configuration of a main part (such as a concentrator) of an internal heat exchange type distillation column according to another embodiment of the present invention. In the internal heat exchange type distillation column according to the second embodiment, the plurality of tubes 25 are arranged in a square as shown in FIG. 3, and four tubes 25 ( 25a, 25b, 2
5c, 25d) The centers A, B,
Lines W, X, Y, and Z connecting C and D are arranged to form a square 28.

In this internal heat exchange type distillation column, each of the tubes 25a, 25 constituting the four-tube unit U2
b, 25c, and 25d, and a plurality of regions (partitioned regions) S2 defined by the lines W, X, Y, and Z that form the square 28, each having a planar shape corresponding to each of the divided regions S2. Filling (split filling) 41, 41 ...
(That is, the divided area 41 is filled in the partitioned area S2 (hatched portion) in the area surrounded by the thick line L2 in FIG. 3). In addition, as the divided charge 41, a plate-like filler (ordered filler) formed by laminating a plurality of plate-like sheets formed by folding a plate material into a predetermined shape by special processing was used. However, the divided filler 41 is not limited to this, and various types of filler such as a net filler obtained by molding a net material into a predetermined shape can be used.

The inner wall 1a of the main body 1 and a plurality of tubes 25
The gap 30 formed between the portions facing the main body 1 is filled with a filling material 42 that is different from the divided filling material 41 and corresponds to the shape of the gap 30. In the second embodiment, as the filler 42, a plate-like filler (ordered filler) formed by laminating a plurality of plate-like sheets formed by folding a plate material into a predetermined shape by special processing is used. . However,
The filler 42 is not limited to this, and various types of fillers, such as a net-like filler formed by shaping a net material into a predetermined shape, can be used. The filler 42 can also be easily attached with a collar by being formed separately.

In the internal heat exchange type distillation column according to the second embodiment, as in the case of the above-described first embodiment, the divided packing 41 is used. Only by preparing the filling material 41, it is possible to easily and surely fill the outer tube 5 with the filling material in such a manner as to be in close contact with the outer tube wall 26 of the plurality of tubes 25. Also,
In the gap 30 formed between the inner wall 1a of the main body 1 and the portion of the plurality of pipes 25 facing the main body 1, divided fillings 41 are provided.
The filling material 42 corresponding to the shape of the cavity 30 is filled with the filling material 42. Since the filling material 42 can be easily provided with a collar by being divided and formed, the filling material 42 of the main body 1 is formed. The space 30 formed between the inner wall 1a and the portion of the plurality of tubes 25 facing the main body 1 can be reliably filled.

In the second embodiment, the case where the divided filling material 41 having the planar shape corresponding to the partitioned area S2 is used is described. However, the filler block having the planar shape in which a plurality of the partitioned areas S2 are connected is described. Can be used, and in that case, the number of fillers to be filled can be reduced and the filling can be performed efficiently.

The present invention is not limited to the first and second embodiments, but relates to the specific arrangement position and the number of the plural pipes, the specific shape of the divided area, and the like. Various applications and modifications can be made within the scope. In the present application, the case where the arrangement of the plurality of tubes is a triangular arrangement and a square arrangement has been mainly described. However, the present invention is also applicable to the case where the plurality of tubes are arranged with a certain regularity by another method. The invention can be applied.

[0038]

As described above, the internal heat exchange type distillation column of the present invention (claim 1) has an outer peripheral portion of a three-tube unit and a plurality of regions (parts) defined by lines forming a substantially equilateral triangle. Each of the divided areas is filled with a filler having a planar shape corresponding to each of the divided areas. Since each of the divided areas has the same shape, one type of the same shaped filler (divided filling) is used. Object), easily and reliably,
The packing can be filled outside the tube in such a manner as to be in close contact with the outer wall of the tube, and the internal heat exchange distillation can be performed efficiently.

Further, the internal heat exchange type distillation column according to claim 2 is:
Since the outer periphery of the four-tube unit and a plurality of regions (partitioned regions) defined by lines forming a substantially square are filled with a filler having a planar shape corresponding to each of the divided regions. As in the case of the internal heat exchange type distillation column according to the first aspect, the shape of each partitioned area becomes the same, and it is easy and easy to prepare one type of packing (divided packing) having the same shape. It is possible to reliably fill the outside of the tube with the packing so as to be in close contact with the outside wall of the tube, and it is possible to efficiently perform the internal heat exchange distillation.

Further, when a packing block in which a plurality of divided packings are integrally formed is used as in the internal heat exchange type distillation column according to claim 3, the number of packings to be packed is reduced. It is possible to perform the filling efficiently.

Further, as in the internal heat exchange type distillation column according to the fourth aspect, the space formed between the inner wall of the main body and the portion of the plurality of tubes facing the main body is formed by a space other than the divided packing. When the filling material suitable for the shape is filled, it is possible to efficiently fill the entire outside of the tube inside the main body with the filling material, so that the present invention can be made more effective.

The packing according to the present invention (claim 5) has an outer peripheral portion of three adjacent pipes (three-tube unit) whose lines connecting the centers form a substantially equilateral triangle when viewed in a plan view. When,
Since it is divided and formed so as to have a planar shape corresponding to a plurality of regions (partitioned regions) defined by lines forming the substantially equilateral triangle, it is easy and simple to prepare a predetermined number of the same type of filler. It is possible to form the internal heat exchange type distillation column in which the packing is filled outside the tube in such a manner as to be in close contact with the outer wall of the tube. Further, when the filler has a planar shape in which a plurality of partitioned areas are connected, the number of fillers to be filled can be reduced, and efficient filling can be performed.

The packing according to the present invention (claim 6) has an outer periphery of four pipes (four pipe units) facing and adjacent to each other, the lines connecting the centers forming a substantially square shape when viewed in a plan view. It is divided and formed so as to have a planar shape corresponding to a portion and a plurality of regions (partitioned regions) defined by lines forming a substantially square, so that it is easy to prepare only a predetermined number of the same type of filler. In addition, it is possible to form the internal heat exchange type distillation column in which the packing is filled outside the tube in such a manner as to be in close contact with the outer wall of the tube. Further, when the filler has a planar shape in which a plurality of partitioned areas are connected, the number of fillers to be filled can be reduced, and efficient filling can be performed.

[Brief description of the drawings]

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

FIG. 2 is a front sectional view showing an internal heat exchange type distillation column according to one embodiment of the present invention.

FIG. 3 is a cross-sectional plan view showing a configuration of a main part (such as a concentration part) of an internal heat exchange type distillation column according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body 1a Inner wall of main body 3a Upper tube sheet 3b Lower tube sheet 4 Inside pipe (recovery section) 5 Outside pipe (concentration section) 6 Concentration section liquid inlet 7 Concentration section vapor outlet 8 Recovery section liquid inlet 9 Recovery section vapor outlet DESCRIPTION OF SYMBOLS 10 Concentration part vapor inlet 11 Concentration part liquid outlet 12 Recovery part vapor inlet 13 Collection part liquid outlet 14a, 14b End chamber 25, 25a, 25b, 25c, 25d Tube (multiple tubes) 26 Tube outer wall 27 Regular triangle 28 Square 29, 30 Voids 31, 41 Divided packing 32, 42 Filling S1, S2 Partitioned area U1 Three pipe unit U2 Four pipe unit A, B, C, D Center of pipe W, X, Y, Z line

Continuing from the front page (72) Inventor Toshinari Nakanishi 2-1-2-2, Kuise-Terashima, Amagasaki City, Hyogo Prefecture Inside Kimura Kakoki Co., Ltd. (72) Inventor Hideo Noda 2-97-7 Minami-Nanamatsucho, Amagasaki City, Hyogo Prefecture Seki In-house of Nishi Chemical Machinery Co., Ltd. (72) Inventor ▲ Yasu ▼ 2-25-10 Hatchobori, Chuo-ku, Tokyo

Claims (6)

[Claims] 1. A structure in which a plurality of pipes are connected to a main body by means of a tube plate at both ends, so that the inside and the outside of the plurality of pipes are separated from each other inside the main body. An inlet / outlet is provided, 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 in which one distillation column is constituted by transferring heat from the outside of the high pressure side tube (concentration section) to the inside of the low pressure side pipe (recovery section) side. A triangular arrangement, wherein the enrichment section on the outer side of the tubes is a packed tower, and a line connecting the centers in a plan view forms three substantially adjacent triangles (three-tube unit). An outer peripheral portion and a plurality of regions ( In each of the image areas), the internal heat exchanging type distillation column packing (split packing) is characterized in that it is filled with a planar shape corresponding to the partitioned regions. 2. A structure in which a plurality of pipes are connected to a main body by means of a tube plate at both ends, so that the inside and outside of the plurality of pipes are separated from each other inside the main body. An inlet / outlet is provided, 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 in which one distillation column is constituted by transferring heat from the outside of the high pressure side tube (concentration section) to the inside of the low pressure side pipe (recovery section) side. A quadrangular arrangement, wherein the enrichment section on the outer side of the tubes is a packed tower, and four pipes facing each other and adjacent to each other (a four-tube unit) whose lines connecting the centers form a substantially square shape when viewed in plan And a plurality of regions partitioned by lines forming the substantially square In each of the divided area), heat integrated distillation column packing (split packing) is characterized in that it is filled with a planar shape corresponding to the partitioned regions. 3. The packing material according to claim 1, wherein the plurality of divided packings are filled with a plurality of packing blocks formed integrally with each other, so that the packing area is filled with the packing material. Internal heat exchange distillation column. 4. A space formed between the inner wall of the main body and a portion of the plurality of pipes facing the main body is filled with a filler other than the filler (divided filler). The internal heat exchange type distillation column according to claim 1. 5. A plurality of tubes having a triangular arrangement connected to the body by means of a tube plate at both ends, so that the inside of the plurality of tubes is separated from the outside of the tube. Used to fill the filling material in the outer periphery of three adjacent pipes (three-tube unit) whose center connecting line forms a substantially equilateral triangle when viewed in a plan view. And that it is divided so as to have a planar shape corresponding to a plurality of regions (partitioned regions) defined by lines forming the substantially equilateral triangle, or a planar shape in which a plurality of the divided regions are connected. Characteristic filling. 6. A plurality of tubes in a tower (body shell) having a structure in which the inside of the plurality of tubes is separated from the outside of the tube by connecting the plurality of tubes in a square array to the main body by a tube plate at both ends. Which is used when the filling is performed on the outer periphery of four pipes (four pipe units) opposed to each other and adjacent to each other, the lines connecting the centers form a substantially square shape when viewed in a plan view. Part and a planar shape corresponding to a plurality of regions (partitioned regions) defined by the lines forming the substantially squares, or being divided and formed to have a planar shape in which a plurality of the divided regions are connected. Characteristic filling.