JPH11314007A - Liquid collecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring a liquid and steam into sufficient contact with each other. SOLUTION: This liquid collecting apparatus comprises an outer box, an inner partition dividing the inside of the outer box to form a plurality of chambers neighboring one another, a collector box 72 forming a liquid collecting channel 91 along the inner circumferences of the outer box and the inner partition, and a plurality of collector laminas 93, 94 installed on the collector box 72 at prescribed pitches in parallel to one another. Each lamina is provided with an inclination part 74 and a groove part 75. One end of each groove part 75 is set face to face to the outer box side of the liquid collecting channel 91 and the other end is set face to face to the inner partition side of the liquid collecting channel 91. Since the flow of the liquid and the flow of steam do not get uneven, the liquid and steam can sufficiently be brought into contact with each other in the upper and the lower chambers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a liquid collecting device.

[0002]

2. Description of the Related Art Conventionally, when a plurality of distillation columns are combined and a product is obtained by separating each component from a stock solution containing a plurality of components by distillation to obtain a product, if a plurality of distillation columns are separately constructed, an occupied area becomes large. Would. Further, in the side column type distillation apparatus, since it is necessary to control the distribution of steam between the respective distillation columns in order to adjust the pressure in each of the distillation columns, the respective distillation columns cannot be operated stably. .

[0003] Therefore, there has been provided a distillation apparatus which uses a Petriuk-type distillation column in which an inner cylinder is provided in an outer cylinder, and a stock solution is supplied into the inner cylinder to perform distillation. However, in this case, not only is it difficult to support the inner cylinder with respect to the outer cylinder, arrange a line by penetrating the outer cylinder, and attach a feed nozzle to the inner cylinder, but also a distillation apparatus. Cost is high. In addition, since the space between the line and the outer cylinder and the space between the feed nozzle and the inner cylinder cannot be sufficiently sealed, the efficiency of distillation in the distillation column is reduced.

[0004] Since the inner cylinder and the outer cylinder are arranged concentrically and the collecting section and the concentrating section have an annular structure, it is difficult to manufacture trays arranged in the collecting section and the concentrating section. become. Therefore, a distillation apparatus in which the inside is partitioned by a flat partition is provided (US Pat. No. 42305).
No. 33).

[0005] In this case, the distillation apparatus is supplied with a stock solution through an inlet pipe, and has a first concentrating section formed above the inlet pipe and a first collecting section formed below the inlet pipe. And a distillation unit connected to the upper end of the first distillation unit,
A second distillation unit formed above the upper end, a second distillation unit formed below the upper end, and provided with a recovery unit adjacent to the concentration unit of the first distillation unit; A third section connected to the lower end of the distillation section, formed above the lower end, and provided with a concentration section adjacent to the recovery section of the first distillation section, and a recovery section formed below the lower end; A distillation section. In addition, the enrichment 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 enrichment section of the third distillation section each include the intermediate partition. Adjacent to each other.

Therefore, the cost of the distillation apparatus can be reduced, the efficiency of distillation can be increased, and the tray can be easily manufactured.

[0007]

However, in the conventional distillation apparatus, a liquid collecting apparatus is provided between the concentration section of the first distillation section and the recovery section of the first distillation section. In the liquid collecting device, the liquid descending from the concentrating unit of the first distillation unit is collected and distributed to the collecting unit of the first distillation unit. Is supplied, the flow of the liquid is biased, and the liquid cannot be uniformly distributed to the recovery section of the first distillation section. Therefore, the lower chamber of the liquid collecting device, that is,
The liquid and the vapor cannot be brought into sufficient contact in the recovery section of the first distillation section.

In the liquid collecting apparatus, the vapor that has risen from the recovery section of the first distillation section flows opposite to the liquid, and is sent to the concentration section of the first distillation section. If the flow of the liquid is biased, the vapor cannot be sent uniformly to the concentrating section of the first distillation section. Therefore, the chamber above the liquid collecting device, that is, the first
Liquid and vapor cannot be brought into sufficient contact in the concentration section of the distillation section.

Also, a liquid collecting device is provided between the collecting portion of the second distillation portion and the concentration portion of the third distillation portion, and in the liquid collecting device, the collecting portion of the second distillation portion is provided. Is collected and distributed to the concentrating section of the third distillation section. In the liquid collecting apparatus, a part of the liquid is taken out as a product. Cannot be distributed uniformly to the concentrating section of the third distillation section.
Therefore, the liquid and the vapor cannot be sufficiently brought into contact with each other in the lower chamber of the liquid collecting device, that is, in the concentration section of the third distillation section.

[0010] In the liquid collecting apparatus, the vapor that has risen from the enrichment section of the third distillation section flows opposite to the liquid and is sent to the recovery section of the second distillation section. If the flow of the liquid is biased, the vapor cannot be uniformly sent to the recovery section of the second distillation section. Therefore, the chamber above the liquid collecting device, that is, the second chamber
In the recovery section of the distillation section, the liquid and the vapor cannot be brought into sufficient contact.

The present invention solves the problems of the above-mentioned conventional distillation apparatus, and provides a liquid collecting apparatus capable of bringing a liquid and a vapor into sufficient contact in a chamber above or below the liquid collecting apparatus. The purpose is to do.

[0012]

For this purpose, in the liquid collecting apparatus of the present invention, an outer casing (today) and a partition for dividing the inside of the outer casing and forming a plurality of chambers adjacent to each other are provided;
A collector box for forming a liquid collecting groove along the inner periphery of the outer casing and the inner partition; and a plurality of collector laminas arranged on the collector box in parallel with each other at a predetermined pitch.

Each of the collector laminas has an inclined portion and a groove. One end of each groove faces the outer casing side portion of the liquid collecting groove, and the other end faces the middle partition side of the liquid collecting groove. In another liquid collecting apparatus of the present invention, each of the collector laminas is disposed in a direction perpendicular to the partition. In still another liquid collecting apparatus of the present invention, each of the collector laminas is inclined toward a side away from the center of the chamber.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a conceptual diagram of the combined distillation column according to the embodiment of the present invention. In the figure, reference numeral 10 denotes a combined distillation column, and the combined distillation column 1
0 is the first section 11, the second section 12, the third section
Section 13, fourth section 14, fifth section 15, sixth section 16, seventh section 17, eighth
It comprises a section 18 and a ninth section 19.

The fourth section 14, the fifth section 15 and the sixth section 16 are divided into first chambers 14A to 16A by flat partitions 22 to 24, respectively.
And the first chambers 14A to 16A.
And the second chambers 14B to 16B are adjacent to each other. Further, the first chambers 14A, 15A, and 16A allow the first distillation section 25 to perform the first section 11 and the second section 11A.
Section 12, third section 13, and second chamber 14B
As a result, the second distillation section 26 is connected to the second chambers 15B and 16B.
B, seventh section 17, eighth section 18 and ninth section
The third distillation sections 27 are respectively formed by the sections 19. The partitions 22 to 24 may be formed of a heat insulating material, or the insides of the partitions 22 to 24 may be evacuated so that the partitions 22 to 24 have a heat insulating structure.

In this case, heat transfer between the first chamber 14A and the second chamber 14B, between the first chamber 15A and the second chamber 15B, and between the first chamber 16A and the second chamber 16B, respectively. Since it can be reduced, the efficiency of distillation can be increased. The fifth column is located substantially at the center of the combined distillation column 10.
The section 15 is provided, and a feed nozzle 41 is provided in the first chamber 15A, and a side cut nozzle 42 is provided in the second chamber 15B. Further, the first section 11 is disposed at the top of the combined distillation column 10, and the first section 11 has a steam outlet 43 connected to a condenser (not shown).
And a reflux liquid inlet 44 are respectively provided. Further, a ninth section 19 is provided at the bottom of the combined distillation column 10, and a bottoms outlet 45 and a steam inlet 46 are provided in the ninth section 19 so as to be connected to an evaporator (not shown). .

In the combined distillation column 10 having the above structure, a mixture containing a plurality of components A to C is supplied as a stock solution M through the feed nozzle 41. Component A has a lower boiling point than component B, and component B has a lower boiling point than component C. Further, a distillation apparatus is constituted by the combined distillation column 10, the condenser, the evaporator and the like. In the first distillation section 25, the enrichment section AR1 is provided by the first chamber 14A provided above the feed nozzle 41, and the collection section is provided by the first chamber 16A provided below the feed nozzle 41. AR2 is formed respectively. In the second distillation section 26, the enrichment section AR3 is formed by the second section 12, and the recovery section AR4 is formed by the second chamber 14B arranged adjacent to the enrichment section AR1. Further, in the third distillation section 27, the enrichment section AR5 is formed by the second chamber 16B disposed adjacent to the recovery section AR2, and the recovery section AR6 is formed by the eighth section 18.

As shown in the drawing, the upper end of the first distillation section 25 is located at the center of the second distillation section 26, and the lower end of the first distillation section 25 is located at the center of the third distillation section 27. Connected to each other. Then, in the recovery section AR2, the stock solution M supplied from the feed nozzle 41 descends, and generates vapors rich in components A and B upward, and liquids rich in components B and C downward, respectively. The liquid rich in the components B and C is supplied to the third distillation section 27 from the lower end of the first distillation section 25.

Further, the liquid enriched in the components B and C is heated in the third distillation section 27 to become a vapor enriched in the components B and C, and the undiluted liquid M rises in the recovery section AR2 while rising. To generate a vapor rich in components A and B from the stock solution M. Subsequently, the vapors rich in the components A and B rise in the enrichment section AR1, and the first distillation section 2
5 is supplied to the second distillation section 26 from the upper end. further,
The vapors rich in the components A and B are cooled and condensed in the second distillation section 26 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 refluxed to the concentrating section AR1, and is brought into contact with the vapor rich in the components A and B rising in the concentrating section AR1. In this way, vapors rich in components A and B can be supplied from the upper end of the first distillation section 25 to the second distillation section 26. By the way, a vapor outlet 43 is formed at the top of the combined distillation column 10, and a bottoms outlet 45 is formed at the bottom of the column. In the recovery section AR6, the liquid rich in the components B and C descends, and generates vapor rich in the component B at the upper part and liquid rich in the component C at the lower part. Therefore, the liquid rich in the component C is discharged from the bottom outlet 45 as bottoms.

A part of the liquid rich in component C discharged from the bottom outlet 45 is sent to the evaporator and heated by the evaporator to become a vapor rich in component C. The vapor rich in component C is supplied from the vapor inlet 46 to the ninth section 19, and comes into contact with the liquid rich in components B and C while ascending in the ninth section 19 and the recovery section AR6. A vapor rich in component B is generated from the liquid rich in components B and C.

Subsequently, a part of the vapor rich in the component B is
Ascending in the enrichment section AR5, the upper end of the third distillation section 27 comes into contact with the component B-rich liquid from the second distillation section 26, and becomes the component B-rich liquid. The liquid rich in component B obtained at the upper end of the third distillation section 27 in this way is discharged from the side cut nozzle 42 as a side cut liquid, that is, a product.

On the other hand, the recovery section AR of the second distillation section 26
At 4, the liquids rich in components A and B descend, producing vapors rich in component A above and liquids rich in component B downward. In this way, a liquid rich in component B is obtained at the lower end of the second distillation section 26. Also, the vapor rich in the component A is
It rises in the concentrating section AR3, is discharged from the vapor outlet 43, is sent to the condenser, and is condensed by the condenser to become a liquid rich in the component A.

As described above, the liquid rich in the components A and B is separated into the vapor rich in the component A and the liquid rich in the component B by the second distillation section 26, and the vapor rich in the component A is separated. Is discharged from the top and is condensed by a condenser to become a liquid rich in component A, and the liquid rich in component B is discharged from the side cut nozzle 42 as a product. Also,
The liquid enriched in components B and C is separated into a liquid enriched in component B and a liquid enriched in component C by the third distillation section 27, and the liquid enriched in component B is converted into a side cut nozzle 42 as a product. And the liquid rich in component C is discharged from the bottom outlet 45.

Then, in order to increase the efficiency of distillation of the component A, the liquid rich in the component A is refluxed from the reflux liquid inlet 44 to the concentrating unit AR3, and the components A and B rising in the concentrating unit AR3. In contact with rich steam. Each of the enrichment sections AR1, AR3, AR5 and each of the recovery sections AR2, AR4, AR6 are formed by a filling material consisting of one node.
Depending on the specific volatility between each of the components A to C to be distilled, in order to secure the number of theoretical plates required for the distillation, it is formed by a packing composed of a plurality of nodes corresponding to the characteristics of the packing used. You can also. In addition, a distributor can be provided between nodes. Further, the feed nozzle 41 and the side cut nozzle 42 do not always need to be arranged at the same height.

In this way, the stock solution M can be separated into the components A to C without using a plurality of distillation columns. Further, since it is not necessary to repeat heating and cooling in each of the plurality of distillation columns, it is not necessary to provide instrumentation equipment such as a condenser, an evaporator, and a pump (not shown). Therefore, not only the area occupied by the distillation apparatus can be reduced, but also the usage amount and energy consumption of the utility can be reduced, and the cost of the distillation apparatus can be reduced.

The combined distillation column 10 has a total of about 30 to
It is preferable that the fourth section 14 and the sixth section 16 each have about 5 to 30 steps, each having 100 theoretical steps. By the way, the third section 13
A collector 54 and a channel-type distributor 61 are disposed in the first section 14, and the liquid collected by the collector 54 is distributed by the distributor 61 at a predetermined distribution ratio to the first chamber 14 </ b> A and the second chamber 1 of the fourth section 14.
4B and different amounts.

The first chamber 15A of the fifth section 15
A lamina-type collector 62 is disposed immediately above the feed nozzle 41, and a tubular-type distributor 63 is disposed directly below the feed nozzle 41. The liquid collected by the collector 62 is mixed with the undiluted solution M supplied through the feed nozzle 41. Is distributed to the first chamber 16A of the sixth section 16 by the distributor 63.

On the other hand, the second chamber 15B of the fifth section 15
A lamina-type collector 65 is disposed immediately above the side-cut nozzle 42, and a tubular-type distributor 66 is disposed directly below the side-cut nozzle 42. The liquid collected by the collector 65 is discharged from the side-cut nozzle 42 as a product. , By the distributor 66 to the second chamber 16 </ b> B of the sixth section 16.

Further, a collector 67 and a tubular distributor 68 are provided in the seventh section 17, and the liquid descending from the sixth section 16 is:
After being collected by the collector 67, it is distributed to the eighth section 18 by a distributor 68. By the way, it is necessary to make the liquid descending from the enrichment section AR1 of the first distillation section 25 and the vapor rising in the recovery section AR2 come into contact with each other. Unevenness occurs in the flow of the liquid, so that the liquid and the vapor cannot be brought into sufficient contact in the concentration section AR1 and the recovery section AR2.

The recovery section AR of the second distillation section 26
And the concentrating unit A of the third distillation unit 27
R5 is brought into contact with the ascending vapor and a part of the liquid is taken out as a product. To take out the product, a liquid receiver (not shown) protrudes greatly into the second chamber 15B. The flow of the vapor is biased by the liquid receiver, and the liquid and the vapor cannot be sufficiently brought into contact with each other in the recovery section AR4 and the concentration section AR5.

Therefore, as described above, lamina-type collectors 62 and 65 are used. FIG. 1 is a sectional view of a main part of a collector according to an embodiment of the present invention, FIG. 3 is a plan view of the collector according to the embodiment of the present invention, FIG. 4 is a plan view of a collector box according to the embodiment of the present invention, and FIG. FIG. 2 is a sectional view of a collector box according to the embodiment of the present invention. In this case, FIGS. 1 and 3
4 is shown only for the collector 62, and FIGS. 4 and 5 are shown for the collectors 62 and 65 (FIG. 2).

In the figure, 15 is the fifth section, 15
A is a first chamber, 15B is a second chamber, and 62 is a collector.
The collector 62 includes a tower main body 70 as an outer casing, and a middle partition 2 that divides the fifth section 15 in the tower main body 70 to form a semi-cylindrical first chamber 15A and a second chamber 15B.
3, a collector box 72 forming a liquid collecting groove 91 along the inner periphery of the tower main body 70 and the partition 23, a lamina support 92 erected on the collector box 72, and a predetermined along the lamina support 92. A plurality of collector laminas 93 and 94 are arranged in parallel with each other at a pitch. As shown in FIG. 3, each of the collector laminas 93 and 94 has an inner peripheral wall 72 a of the collector box 72.
Above, it is installed between the tower body 70 side portion and the partition 23 side portion, and extends in a direction perpendicular to the partition 23.

The collector laminas 93 and 94 are:
A bent portion 73 is provided at the upper end, an inclined portion 74 is provided at the center, and a groove 75 is provided at the lower end. The bent portion 73 and the groove 75 both extend horizontally (in the depth direction in FIG. 1). The collector lamina 94 at the center of each of the collector laminas 93 and 94
Are inclined portions 74 and bent portions 73 with respect to one groove portion 75.
And the two inclined portions 74 are inclined toward the side away from the center of the first chamber 15A. For example, four collector laminas 93 are provided on both sides of the collector lamina 94, for example, four each.
It is inclined toward the side away from the center of 5A. In addition, the tip of each bent portion 73 is overlapped with the inclined portion 74 of the adjacent collector lamina 93, so that the descending liquid always hits the collector lamina 93, 94.

One end of each of the grooves 75 is connected to a liquid collecting groove 91.
Of the liquid collecting groove 91, the other end thereof faces the partition 23 side of the liquid collecting groove 91, so that the liquid collected in the groove portion 75 flows from the tower body 70 side or the partition 23.
The liquid is sent to the liquid collecting groove 91 from the side. In the portion of the liquid collecting groove 91 farthest from the partition 23, the tower body 7 is provided.
0 is connected to the feed nozzle 41, and the collector box 72 is connected to the liquid discharge nozzle 95. Further, the collector 65 has the same structure as the collector 62, and a side cut nozzle 42 is connected to the tower main body 70 at a portion of the liquid collecting groove 91 farthest from the partition 23,
The liquid extraction nozzle 95 is connected to the collector box 72.

In this case, the column main body 70, the partition 23, and the collectors 62 and 65 constitute a liquid collecting device. Therefore, the liquid descending from the first chamber 14 </ b> A of the fourth section 14 is supplied to each collector laminator 9 of the collector 62.
After hitting 3, 94, it flows along the inclined part 74, is received by the groove part 75, is moved in the horizontal direction, is sent to the liquid collecting groove 91, and is supplied from the feed nozzle 41 in the liquid collecting groove 91. The undiluted solution M is mixed. continue,
The liquid in the liquid collecting groove 91 is withdrawn from the liquid extracting nozzle 95 and sent to the distributor 63, where the first chamber 16A of the sixth section 16 is sent.
Supplied to In this case, in the liquid collecting groove 91, the stock solution M supplied through the feed nozzle 41 is mixed with the liquid collected by the collector 62 and supplied to the first chamber 16A by the distributor 63, so that the liquid M There is no bias in the flow.

The steam rising from the first chamber 16A is supplied to the collector laminas 93 and 94 of the collector 62.
The first chamber 1 passes through the gap (gap) along the inclined portion 74.
5A is tilted away from the center and rises. At this time, since the vapor is smoothly raised along the inclined portion 74, the pressure loss due to the collector 62 is so small that it can be almost ignored. Therefore, the flow of the steam is not biased.

As described above, since the flow of the liquid and the vapor does not become uneven, the liquid and the vapor can be sufficiently brought into contact with each other in the enrichment section AR1 and the recovery section AR2. Then, the liquid that has descended from the second chamber 14B of the fourth section 14 is similarly discharged from each of the collector laminas 9 of the collector 65.
After hitting 3, 94, it flows along the inclined portion 74, is received by the groove 75, is moved in the horizontal direction, and is sent to the liquid collecting groove 91. In the liquid collecting groove 91, a part of the liquid is taken out from the side cut nozzle 42 as a product. Subsequently, the liquid in the liquid collecting groove 91 is discharged to the liquid discharging nozzle 95.
And is sent to the distributor 66, and supplied to the second chamber 16B of the sixth section 16 by the distributor 66. In this case, the collector box 72 does not need to protrude greatly into the second chamber 15B in order to take out the product, so that the flow of the steam is not biased by the collector box 72.

The steam rising from the second chamber 16B is supplied to the collector laminas 93 and 94 of the collector 65.
After passing through the gap between the second chamber 15B and the second chamber 15B, the second chamber 15B is inclined upward along the inclined portion 74. At this time, since the steam is smoothly raised along the inclined portion 74,
The pressure loss due to the collector 65 is so small that it can be almost ignored. Therefore, the flow of the steam is not biased.

As described above, since the flow of the vapor is not biased, the liquid and the vapor can be sufficiently brought into contact with each other in the recovery section AR4 and the concentration section AR5. It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0041]

As described above in detail, according to the present invention, in the liquid collecting apparatus, the outer casing and the partition which divides the inside of the outer casing and forms a plurality of chambers adjacent to each other are formed. ,
A collector box for forming a liquid collecting groove along the inner periphery of the outer casing and the inner partition; and a plurality of collector laminas arranged on the collector box in parallel with each other at a predetermined pitch.

Each of the collector laminas has an inclined portion and a groove. One end of each groove faces the outer casing side portion of the liquid collecting groove, and the other end faces the middle partition side of the liquid collecting groove. In this case, the liquid descending from the upper chamber hits each collector lamina, flows along the inclined portion, is received by the groove portion, is moved in the horizontal direction, and is sent to the liquid collecting groove.

Therefore, since the stock solution can be mixed with the liquid in the liquid collecting groove, the flow of the liquid is not biased. Therefore, the liquid and the vapor can be sufficiently brought into contact with each other in the upper and lower chambers. In addition, since it is not necessary to protrude the collector box into the outer casing in order to take out the product, there is no bias in the flow of steam, so that the liquid and the steam are sufficiently contacted in the upper and lower chambers. Can be.

The steam rising from the lower chamber is
It passes through the gaps between the collector laminas and rises while being inclined to the side away from the center along the inclined portion. At this time, since the steam is smoothly raised along the inclined portion, the pressure loss becomes so small as to be almost negligible. Therefore, since the flow of the vapor is not biased, the liquid and the vapor can be sufficiently contacted in the upper and lower chambers.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a collector according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a combined distillation column according to an embodiment of the present invention.

FIG. 3 is a plan view of a collector according to the embodiment of the present invention.

FIG. 4 is a plan view of the collector box according to the embodiment of the present invention.

FIG. 5 is a sectional view of a collector box according to the embodiment of the present invention.

[Explanation of symbols]

 23 Middle partition 62, 65 Collector 70 Tower body 72 Collector box 74 Inclined part 75 Groove part 91 Liquid collecting groove 93, 94 Collector lamina

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Noboru Okamoto 2-1-1 Tanidocho, Tanashi-shi, Tokyo Sumitomo Tokyo Engineering Co., Ltd. (72) Inventor Minoru Nagashima 2-1-1 Yatocho, Tanashi-shi, Tokyo Sumitomo Tokyo Engineering Co., Ltd.

Claims (3)

[Claims] (A) an outer casing; and (b) a partition that divides the inside of the outer casing and forms a plurality of chambers adjacent to each other.
(C) a collector box forming a liquid collecting groove along the inner periphery of the outer casing and the inner partition; and (d) a plurality of collector laminas arranged in parallel on the collector box at a predetermined pitch. (E) each of the collector laminas has an inclined portion and a groove portion, and one end of each groove portion faces the outer casing side portion of the liquid collecting groove, and the other end faces the middle partition side portion of the liquid collecting groove. A liquid collecting device. 2. The liquid collecting apparatus according to claim 1, wherein each of the collector laminas is disposed in a direction perpendicular to the partition. 3. The liquid collecting apparatus according to claim 2, wherein each of the collector laminas is inclined toward a side away from a center of the chamber.