JP2001137604A - Joint type distillation column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint type distillation column capable of controlling the quantity of liquid fed respectively to a concentration part of a 1st distillation column and a recovering part of a 2nd distillation column without disassembling the joint type distillation column. SOLUTION: In the joint type distillation column 1 provided with a concentration part 5A, in which raw liquid is fed through a nozzle 20A and which is formed above the 20A, a concentration part 2 connected to the upper end of a 1st distilling part 15 and formed above the upper end and a recovering part 9 connected to the lower end of the 1st distilling part 15 and formed below the lower end so as to adjoin the concentration part 5A of the 1st distilling part 15 to a recovering part 5B of a 2nd distilling part 16 and a recovering part 7A of the 1st distilling part 15 to a concentration part 7B of a 3rd distilling part 16 respectively through a partition 12 and a partition 14, a distributor 4 for distributing the liquid respectively fed in a specific ratio is provided and is constituted so as to change the total area of distribution holes 32 in the 1st distilling part 15 by rotating around an axis contained in the partition 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a combined distillation column.

[0002]

2. Description of the Related Art Conventionally, in the case of separating and extracting each component from a stock solution containing multiple components, a dispersive distillation column constituted by dispersing a plurality of distillation columns has been generally used.
In recent years, a combined distillation column in which a plurality of these dispersed distillation columns are combined into one has been used (JP-A-9-29970).
No. 1). As shown in FIG. 8, the combined distillation column 1
Section 2, second section 3, third section 4,
It is composed of a fourth section 5, a fifth section 6, a sixth section 7, a seventh section 8, an eighth section 9 and a ninth section 10.

The third section 4, the fourth section 5, the fifth section 6 and the sixth section 7 are respectively divided into first chambers 4A, 5A by flat partitions 11 to 14.
A, 6A, and 7A and the second chambers 4B, 5B, 6B, and 7B are configured to be adjacent to each other. Further, the first chambers 4A, 5A, 6A, and 7A form a first distillation section 15, and the first section 2 and the second section 3 are formed.
A second distillation section 16 is formed by the second chambers 4B and 5B, and a third distillation section 17 is formed by the second chambers 6B and 7B, the seventh section 8, the eighth section 9 and the ninth section 10, respectively. ing.

The fifth section 6 is provided substantially at the center of the combined distillation column 1, a feed nozzle 20A is provided in the first chamber 6A, and a side cut nozzle 20B is provided in the second chamber 6B. I have. A stock solution containing three components A to C is supplied to the feed nozzle 20. In addition,
Component A has a lower boiling point than component B, and component B has a lower boiling point than component C.

In the first distillation section 15, a concentration section is formed by a first chamber 5A provided above the feed nozzle 20A, and a collection section is formed by a first chamber 7A provided below the feed nozzle 20A. Is formed. In the second distillation section 16, the enrichment section is formed by the first section 2 provided above the upper end of the first distillation section 15, and provided below the upper end of the first distillation section. A collection unit is formed by the second chamber 4B. Further, in the third distillation section 17, a concentration section is formed by the second chamber 7B provided above the lower end of the first distillation section 15, and provided below the lower end of the first distillation section 15. The collected section is formed by the eighth section 9. And the concentrating unit 2 of the second distillation unit 16
Through the second section 3 and the first chamber 4A, it is connected to the upper end of the enrichment section 5A of the first distillation section 15, and the recovery section 5B
The second distillation section 16 is connected to the lower end of the concentration section 2 via the second chamber 4B and the second section 3. Also, the third
The recovery unit 9 of the distillation unit 17 is connected to the lower end of the first recovery unit 7A via the eighth section, and the enrichment unit 7B
It is connected to the upper end of the recovery section 9 of the third distillation section 17 via the eighth section.

At the top of the combined distillation column 1, a steam outlet 51 is provided.
Is formed at the bottom of the column, a reflux liquid inlet 53 is formed at the upper part of the first section 2, and a vapor inlet 54 is formed at the ninth section 10.

Next, the distillation process in the combined distillation column will be described. First, the stock solution containing the components A to C supplied from the feed nozzle 20A is guided to the recovery unit of the first distillation unit 15, and in the recovery unit, the vapor rich in the components A and B is provided in the upper stage. Vapors rich in components B and C are generated in the lower stage, and a liquid rich in components B and C is discharged from the lower end of the first distillation unit 15 to the third distillation unit 17. Further, the liquid rich in the components B and C is
Is heated in the distillation section 17 to generate steam rich in the components B and C. The vapors rich in components B and C are
During the ascent in the recovery section of the distillation section 15, it comes into contact with the stock solution containing the components A to C, and generates vapors rich in the components A and B from the stock solution.

Subsequently, the vapor rich in the components A and B is
It rises in the enrichment section of the first distillation section 15 and is discharged from the upper end of the first distillation section 15 to the second distillation section 16. Further, the vapors rich in the components A and B are cooled and condensed in the second distillation section 16 to become a liquid rich in the components A and B. Then, a part of the liquid rich in the components A and B is returned to the enrichment section of the first distillation section 15 and comes into contact with the vapor enriched in the components A and B rising in the enrichment section.

In this manner, a vapor rich in components A and B can be supplied from the upper end of the first distillation section 15 to the second distillation section 16. On the other hand, a liquid rich in components B and C can be supplied from the lower end of the first distillation section 15 to the third distillation section 17. Then, in the recovery section of the third distillation section 17, the liquid rich in components B and C moves downward, and generates vapor rich in component B in the upper stage and vapor rich in component C in the lower stage. Let it. Therefore, the liquid rich in component C is discharged to the bottom outlet 52 as bottoms. Then, a part of the bottom liquid rich in component C discharged to the bottom liquid outlet 52 is sent to an evaporator (not shown), and is heated by the evaporator to be a vapor rich in component C. The steam rich in component C is supplied from the steam inlet 54 to the ninth section 10, and rises in the ninth section 10 and the recovery section of the third distillation section 17 while being rich in components B and C. It comes into contact with a liquid, from which a vapor rich in component B is generated.

Subsequently, a part of the vapor rich in the component B rises in the enrichment section of the third distillation section 17 and comes into contact with the liquid rich in the component B at the upper end of the third distillation section 17. Become liquid. Thus, the liquid rich in component B obtained at the upper end of the third distillation section 17 is discharged to the side cut nozzle 20B as a side cut liquid. on the other hand,
In the recovery section of the second distillation section 16, the components A and B
The liquid enriched in the liquid moves downward to generate a vapor enriched in component A in the upper stage and a liquid enriched in component B in the lower stage. Therefore, a liquid rich in the component B is obtained at the lower end of the second distillation section 16.

Subsequently, the vapor rich in the component A is converted to the second
, And is discharged to the vapor outlet 51, sent to a condenser (not shown), and condensed by the condenser to become a liquid rich in component A. Then, the liquid rich in the component A is supplied from the reflux liquid inlet 53, and is returned to the concentrating unit of the second distillation unit 16 and is brought into contact with the vapor rising in the concentrating unit, thereby improving the efficiency of the distillation and separation of the component A. Have improved.

In this manner, the liquid enriched in components A and B is separated into a liquid enriched in component A and a liquid enriched in component B by the second distillation section 16. The liquid is condensed by the condenser and discharged as a distillate.
B is discharged as a side cut liquid. Also,
The third distillation section 17 separates the liquid rich in components B and C into a liquid rich in component B and a liquid rich in component C.
At 0B, a liquid rich in component C is discharged to the bottoms outlet 52 as bottoms, respectively.

In the above-described combined distillation column, the second type
Section 3 functions as a distributor. That is, the second section 3 adjusts the flow rate of the liquid flowing down from the first section 2 as shown by the arrow A as shown in FIG. 9 and distributes the liquid to the third section 4 to supply the liquid. The steam rising from the third section 4 as shown by the arrow B is supplied to the first section 2. The second section 3 has a cylindrical tower main body 61, a bottom plate 62 for storing liquid, a steam cylinder 63 that rises upward at the center of the bottom plate 62 and forms a communication port that communicates with the third section 4, It comprises a cap 64 for covering the upper end of the cylinder 63 and a pair of arc-shaped regulating plates 65 arranged on the upper surface of the cap 64 for regulating the flow of the liquid. The bottom plate 62 is provided with a distribution hole 66 for distributing and supplying the liquid to the lower third section 4. As described above, the third section 4 is divided into the first chamber 4A and the second chamber 4B.
By changing the number of distribution holes 66 corresponding to the first chamber 4A and the number of distribution holes 66 corresponding to the second chamber 4B,
The amount of liquid supplied to each of the first chamber 4A and the second chamber 4B can be controlled.

[0014]

However, the distributor of the conventional combined distillation column is fixed to the combined distillation column, so that the first chamber 4A and the second chamber 4B, that is, the first distillation column are not used. When adjusting the amount of liquid to be supplied to each of the concentration section and the recovery section of the second distillation column, the combined distillation column must be once decomposed, and the operation is extremely complicated.

Accordingly, the present invention is directed to a combined type distillation column capable of adjusting the amount of liquid supplied to each of the enrichment section of the first distillation column and the recovery section of the second distillation column without decomposing the combined type distillation column. It is an object to provide a distillation column.

[0016]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. (A) A stock solution is supplied via a feed nozzle, and a concentrating section formed above the feed nozzle. And a first distillation unit having a recovery unit formed below the feed nozzle, and (b) a concentrating unit connected to the upper end of the first distillation unit and formed above the upper end, and Connected to the lower end of the enrichment section,
A second distillation section having a recovery section formed below the upper end of the first distillation section, and (c) a recovery section connected to the lower end of the first distillation section and formed below the lower end, And a third distillation unit connected to the upper end of the recovery unit and provided with a concentrating unit formed above the lower end of the first distillation unit,
(D) The concentrating section of the first distillation section and the recovery section of the second distillation section, and the recovery section of the first distillation section and the concentrating section of the third distillation section are adjacent to each other via a partition. In the combined distillation column, a distributor is provided above the concentrating section in the first distillation section and the recovery section in the second distillation section to distribute the liquid supplied to each of the columns at a specific ratio. The distributor is mounted on the concentrating unit in the first distillation unit and the recovery unit in the second distillation unit, and rotates around an axis included in the partition, so as to rotate the first partition. It is characterized in that it is configured to change the total area of the distribution holes communicating with each of the concentration section in the distillation section and the recovery section in the second distillation section.

As described above, in the present invention, the distributor rotates while being mounted on the enrichment section in the first distillation section and the recovery section in the second distillation section, and rotates the first section.
It is configured to change the total area of the distribution holes communicating with the enrichment section in the distillation section and the recovery section in the second distillation section, so that the distributor is connected to the enrichment section and the second distillation section in the first distillation section. By rotating without removing from the recovery part in the distillation part, the ratio of the liquid to be supplied to each part can be changed.

Further, in the present invention, the distributor has a total area of holes by changing the number of distribution holes communicating with the enrichment section in the first distillation section and the recovery section in the second distillation section. Is preferably changed.

[0019]

Next, an embodiment of a combined distillation column according to the present invention will be described with reference to the drawings. FIG.
It is a schematic diagram of a combined distillation column according to the present example. The combined distillation column 1 according to the present embodiment includes a first section 2, a second section 3, a third section 4, a fourth section 5, and a fifth section.
Section 6, sixth section 7, seventh section 8,
It is composed of an eighth section 9 and a ninth section 10.

The fourth section 5, the fifth section 6 and the sixth section 7 are each composed of a flat partition 12 to 12
14, the first chambers 5A, 6A and 7A and the second chambers 5B and 6
B and 7B, and are configured to be adjacent to each other. In addition, the first chambers 5A, 6A, and 7A provide a first
Of the first section 2, the second section 3, the third section and the second chamber 5B
Of the second chambers 6B and 7B, the seventh section 8, the eighth section 9 and the ninth section 10 form a third distillation section 17, respectively.

At the approximate center of the combined distillation column 1, the fifth
The section 6 is provided, a feed nozzle 20A is provided in the first chamber 6A, and a side cut nozzle 20B is provided in the second chamber 6B. This feed nozzle 2
A stock solution containing three components A to C is supplied to OA.
Component A has a lower boiling point than component B, and component B has a lower boiling point than component C.

In the first distillation section 15, a concentration section is formed by a first chamber 5A provided above the feed nozzle 20A, and a recovery section is formed by a first chamber 7A provided below the feed nozzle 20A. It is formed. In the second distillation section 16, the first distillation section 15
A concentration section is formed by the first section 2 provided above the upper end of the first distillation section, and a recovery section is formed by the second chamber 5B provided below the upper end of the first distillation section. Further, in the third distillation section 17, a concentration section is formed by the second chamber 7B provided above the lower end of the first distillation section 15, and provided below the lower end of the first distillation section 15. The collected section is formed by the eighth section 9. The enrichment section 2 of the second distillation section 16 is connected to the upper end of the enrichment section 5A of the first distillation section 15 via the second section 3 and the third section 4, and the recovery section 5B
Through the third section 4 and the second section 3, the second
Is connected to the lower end of the concentrating unit 2 of the distillation unit 16. The recovery section 9 of the third distillation section 17 is connected to the lower end of the first recovery section 7A via an eighth section, and the concentrating section 7B is connected to the third distillation section 17 via an eighth section. Is connected to the upper end of the collection unit 9 of the first embodiment.

The third section 4 functions as a distributor for distributing the liquid supplied to each of the concentration section 5A in the first distillation section and the recovery section 5B in the second distillation section at a specific ratio. As shown in FIG. 2, the third section 4 includes an outer cylinder 21, an inner cylinder 22 housed in the outer cylinder 21,
A donut-shaped top plate 23 and bottom plate 24 are provided on the outer peripheral surface of the inner cylinder 22.

As shown in FIG. 3, circular grooves 21A and 21B are formed on the upper surface and the bottom surface of the outer cylinder 21. Inside the grooves 21A and 21B, the outer cylinder 21 is formed.
Steps 21D and 21E are formed continuously on the inner peripheral surface 21C. The steps 21D and 21E are configured such that the donut-shaped top plate 23 and the bottom plate 24 are mounted thereon, and the top plate 23 and the bottom plate 24 are fixed to the steps 21D and 21E by screws 25. In addition, the outer cylinder 2
The upper end 21F and the lower end 21G of the outer peripheral surface of the outer cylindrical body 1 are formed so as to have a smaller diameter, and a hole 26 facing the center is formed in the outer periphery of the outer cylindrical body 21.

The outer diameter of the inner cylindrical body 22 is the donut-shaped upper plate 2.
3 and the inner diameter of the bottom plate 24 and smaller than the inner diameter of the outer cylinder 21. Therefore, a space 27 is formed between the outer peripheral surface 22A of the inner cylinder 22 and the inner peripheral surface 21C of the outer cylinder 21. Above the outer peripheral surface 22A of the inner cylindrical body 22, a plurality of holes 2 communicating from the outer peripheral surface of the inner cylindrical body 22 to the inner surface are provided.
8 are formed.

The upper plate 23 is provided with the step 2 of the outer cylinder 21.
A screw hole 29 into which the screw 25 fixed to 1D is inserted is formed along the outer periphery, and a plurality of dispersion holes 30 are formed inside the screw hole 29 at equal intervals in the circumferential direction. In the bottom plate 24, a screw hole 31 into which a screw 25 for fixing the same to the step 21E of the outer cylindrical body 21 is formed is formed along the outer periphery. Inside the screw hole 31, a plurality of distribution holes 32 are formed in the circumferential direction. They are formed at uneven intervals. That is, four distribution holes 32 formed in the bottom plate 24 are formed between the screw holes 31A formed on the rear side and the screw holes 31B formed on the right side, and the screw holes 31B are formed on the front side as shown in FIG. Two, one slightly to the left of the screw hole 31C and one in front of the left screw hole 31D, and one between the screw hole 31D and the screw hole 31A. Neither is formed.

The third section 4 is connected to the second section 3 via an upper support flange 33 attached to the upper end thereof.
Support flange 3 connected to the lower end and attached to the lower end
4 to be connected to the fourth section 5. An O-ring 35 is interposed between the groove 21 </ b> A formed on the upper surface of the outer cylinder 21 and the upper support flange 33, and the groove 21 </ b> B formed on the bottom surface of the outer cylinder 21 and the lower support flange 34. An O-ring 36 is interposed therebetween, whereby the upper support flange 33 and the upper surface of the outer cylinder 21 and the lower support flange 34 and the lower surface of the outer cylinder 21 are kept airtight.

At the center of the bottom surface of the upper support flange 33,
As shown in FIG. 3, a circular one-stage depression 33A is formed, and the inside diameter of the depression 33A is the upper end 2 of the outer cylinder 21.
The outer cylindrical body 21 is formed slightly larger than the outer diameter of 1F.
The upper end 21F is fitted into the depression 33A. In the center of the upper surface of the lower support flange 34, as shown in FIGS.
A, 34B are formed, and the depressions 34A, 34B are formed.
In B, a partition plate 39 which is connected to the middle partition 12 when connected to the fourth section 5 is provided. The inner diameter of the upper recess 34A of the lower support flange 34 is formed to be slightly larger than the outer diameter of the lower end 21G of the outer tubular body 21, and the lower end 21G of the outer tubular body 21 is fitted into the recess 34A. Further, the lower support flange 34
A plurality of supply holes 40 communicating with the fourth section 5 are formed on the bottom surface of the lower recess 34B.

The upper support flange 33 is provided with a plurality of screw holes 42 along which the bolts 41 meet, and the lower support flange 34 is provided with a plurality of holes 43 through which the bolts 41 pass. Is formed. Accordingly, by tightening the bolt 41, the upper support flange 33 and the lower support flange 34 can hold the third section 4 while maintaining airtightness. In addition, the upper end 21F and the lower end 21G of the outer cylindrical body 21 are recessed 33A of the upper support flange 33 and lower support flange 34A.
Since the bolts 41 are slightly loosened from the tightened state, the third section 4 can be brought into a state in which the third section 4 can be rotated with respect to the upper support flange 33 and the lower support flange 34. The third section 4 is divided into an upper support flange 33 and a lower support flange 34.
When rotating the third section 4 by inserting a rod-shaped object such as a screwdriver into the hole 26 formed in the outer peripheral surface of the outer cylindrical body 21 and holding it, the third section 4 can be easily rotated. Can be. In addition, as shown in FIG.
A scale 21H indicating the amount of rotation of the third section 4 is provided on the outer peripheral surface of the outer cylinder 21. By providing the scale, the amount of rotation of the third section 4 can be easily recognized. Note that the form of the scale for displaying the rotation amount is not limited to this, and may be displayed in another form.

Further, PTFE 44 is interposed between the upper support flange 33 and the lower end of the second section 3 and between the lower support flange 34 and the upper end of the fourth section 5. The upper support flange 33, the third section 4, the lower support flange 34, and the fourth section 5 can be air-tightly communicated. Further, an approximately cylindrical umbrella body 45 having the same outer diameter as the inner cylindrical body 22 is installed inside the second section 3, and the umbrella body 45 is located directly above the inner cylindrical body 22. It is installed as follows.

Next, the operation of the third section (distributor) 4 of the combined distillation column 1 according to the present embodiment will be described. First, the stock solution containing the components A to C supplied from the feed nozzle 20A is guided to the recovery unit of the first distillation unit 15, and in the recovery unit, the vapor rich in the components A and B is provided in the upper stage. A vapor rich in components B and C is generated in the lower stage. The vapor rich in the components A and B rises in the enrichment section of the first distillation section 15 and, as shown by the dashed line A in FIG. 3, from the upper end of the first distillation section 15 to the second distillation section 16. And is guided to the second section 3 after passing through the inner cylinder 22 of the third section 4, and then to the first section 2, that is, the enrichment section of the second distillation section 16. Then, the vapors rich in the components A and B are cooled and condensed in the enrichment section of the second distillation section 16 to become a liquid rich in the components A and B.

The liquid rich in the components A and B flows out of the first section 2 into the second section 3 and flows down in the second section 3.
Due to the presence of 5, the liquid rich in components A and B does not flow directly below the umbrella body 45, that is, into the inner cylinder 22. Therefore, the liquid that has flowed into the third section 4 from the second section 3 first strikes the upper plate 21 existing outside the inner cylindrical body 22 and is uniformly dispersed in the circumferential direction by the dispersion holes 30 formed in the upper plate 21. As a result, it flows down into the space 27 formed between the inner cylinder 22 and the outer cylinder 21. Next, the liquid rich in the components A and B hits the bottom plate 24 and flows out into the first chamber 5A or the second chamber 5B of the fourth section 5 through the distribution holes 32 formed in the bottom plate 24. At this time, since the distribution holes 32 are formed at unequal intervals in the circumferential direction, the liquids rich in the components A and B are supplied to the fourth plate in accordance with the number of the distribution holes 32 with the partition plate 39 as a boundary. First chamber 5A or second section 5
It is distributed to the chamber 5B.

That is, as shown in Table 1, when the third section 4 is rotated by minus 10 degrees in FIG. 4, the number of distribution holes 32 communicating with the first chamber 5A is one, while the number of distribution holes 32 communicating with the first chamber 5A is one. Since there are seven distribution holes 32 communicating with the chamber 5B, the amount of liquid supplied to the first chamber 5A and the second chamber 5B is distributed 1: 7. When the distributor is rotated plus 20 degrees, the amount of liquid supplied is distributed 2: 6. Note that the number (number) of the distribution holes 32 is not limited to this, and may be changed depending on the size of the distillation column, and the method of combining the distribution ratios may be appropriately changed.

[0034]

[Table 1] In this embodiment, when changing the ratio of the liquid distributed to the first chamber 5A or the second chamber 5B, the bolt 41 is loosened,
This can be performed by inserting a screwdriver or the like (not shown) into a hole 26 formed in the outer peripheral surface of the outer cylinder body 21 and rotating the third section 4 with respect to the fourth section 5,
There is no need to disassemble the combined distillation column.

Next, a second embodiment of the combined distillation column according to the present invention will be described. The combined distillation column according to the second embodiment differs from the first embodiment in the shapes of the inner cylinder 22 and the bottom plate 24 of the third section 4. As shown in FIG. 6, a plurality of distribution holes 2 are provided at an intermediate position in the axial direction of the outer peripheral surface 22A of the inner cylindrical body 22 in the second embodiment at unequal intervals in the circumferential direction.
2B is formed. On the other hand, no distribution holes are formed in the bottom plate 24. Therefore, in the second embodiment, the liquids rich in the components A and B flowing out from the second section 3 into the third section 4 are supplied from the bottom plate 24 to the fourth section 5.
Without flowing down, the liquid is temporarily stored in a space 27 formed between the inner cylindrical body 22 and the outer cylindrical body 21, and the water surface of the liquid stored in the space 27 is distributed on the outer peripheral surface 22 </ b> A of the inner cylindrical body 22. Hole 2
When the liquid exceeds the position 2B, the liquid flows down from the distribution hole 22B into the inside of the inner cylindrical body 22, and flows down into the fourth section 5. At this time, since the distribution holes 22B formed in the outer peripheral surface 22A of the inner cylindrical body 22 are formed at unequal intervals in the circumferential direction, the distribution holes 22B of the fourth section 5 are formed in accordance with the number of the distribution holes 22B. The first chamber 5A and the second chamber 5B are respectively distributed at an appropriate ratio.

As described above, in the first and second embodiments, the total area of the distribution holes is changed by changing the number of the distribution holes. However, the present invention is not limited to this. As shown in FIG. Two bottom plates 24A and 22B are overlapped, a triangular distribution hole 32A is formed in the upper bottom plate, and a circular distribution hole 32B is formed in the lower bottom plate. Thus, the total area of the distribution holes may be changed.

[0037]

As described above, according to the present invention, the amount of liquid supplied to each of the enrichment section of the first distillation column and the recovery section of the second distillation column without disassembling the combined distillation column is reduced. An adjustable combined distillation column can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment of a combined distillation column according to the present invention.

FIG. 2 is an exploded view of a distributor used in the combined distillation column according to the present embodiment.

FIG. 3 is a front sectional view of a distributor used in the combined distillation column according to the present embodiment.

FIG. 4 is a plan view of a bottom plate of a distributor used in the combined distillation column according to the present embodiment.

FIG. 5 is a perspective view of a lower support flange used in the combined distillation column according to the present embodiment.

FIG. 6 is a perspective view showing an inner cylinder and a bottom plate of a distributor used in a combined distillation column according to a second embodiment of the present invention.

FIG. 7 is a perspective view of another example of the inner cylinder and the bottom plate of the distributor used in the combined distillation column according to the present invention.

FIG. 8 is a schematic view of a conventional combined distillation column.

FIG. 9 is a front sectional view of a distribution diagram used in a conventional combined distillation column.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combined distillation tower 2, 5A, 7B Concentration part 4 Distributor (3rd section) 5B, 7A, 9 Recovery part 15 1st distillation section 16 2nd distillation section 17 3rd distillation section 32 Distribution hole

Continuing from the front page (72) Inventor Masakatsu Yaegashi 3-1-2-5 Ikenohata, Taito-ku, Tokyo Inside Shibata Science Co., Ltd. (72) Inventor Yoichi Harada 5-9-1-11 Kita-Shinagawa, Shinagawa-ku, Tokyo Sumitomo Heavy Industries F term in reference (reference) 4D076 BB03 BB23 BB27 CA01 CA12 CD03 EA08Y EA16Y JA03 JA05

Claims (2)

[Claims] 1. (a) a first distillation section which is supplied with a stock solution via a feed nozzle and has a concentration section formed above the feed nozzle, and a recovery section formed below the feed nozzle; And (b) a concentrating unit connected to the upper end of the first distillation unit and formed above the upper end, and connected to the lower end of the concentrating unit and formed below the upper end of the first distillation unit. A second distillation unit with a recovered recovery unit;
(C) a recovery section connected to the lower end of the first distillation section and formed below the lower end; and a recovery section connected to the upper end of the recovery section and formed above the lower end of the first distillation section. A third distillation unit provided with a concentrating unit, and (d) a concentrating unit of the first distillation unit, a collecting unit of the second distillation unit, and the first distillation unit.
In the combined distillation column, the recovery section of the distillation section and the concentration section of the third distillation section are adjacent to each other via a partition, wherein the concentration section and the second collection section in the first distillation section are provided.
A distributor is provided above the recovery unit in the distillation unit for distributing the liquid supplied to each of the distillation units at a specific ratio. The distributor includes a concentrating unit and a second distillation unit in the first distillation unit. In the state attached to the collecting section, the rotation of the axis included in the partition as a center, and the total of the distribution holes communicating with the enriching section in the first distillation section and the collecting section in the second distillation section, respectively. A combined distillation column configured to change the area. 2. The distributor according to claim 1, wherein a total area of the distribution holes is changed by changing a number of holes communicating with each of the concentration unit in the first distillation unit and the recovery unit in the second distillation unit. The combined distillation column according to claim 1, wherein the combined distillation column is constituted.