JP2004305975A - Distillation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase distillation efficiency and to take out liquid while stabilizing components in the liquid. <P>SOLUTION: This distillation apparatus is equipped with: a column body 12; a collector 32 provided with a liquid groove 34 and a discharge passage, collecting flowing-down liquid and discharging it from a discharge port 77 of the discharge passage; a drawing out passage receiving a part of the discharged liquid and drawing it out to the outside of the column body 12; and a distributor 33 receiving the rest of the liquid and distributing it downward. Since the liquid sufficiently mixed in the groove 34 is drawn out through the drawing out passage, the liquid can be taken out with stabilized components. All of the rest of the liquid is sent to the distributor 33 to increase the distillation efficiency. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a distillation apparatus.
[0002]
[Prior art]
Conventionally, in a process apparatus, for example, a distillation apparatus, a distillation column is used to separate each component from a stock solution containing multiple components. A collector (a liquid collecting device) and a distributor (a dispersing device) are provided as internals in the column main body of the distillation column, and the liquid that descends in the column main body is collected by the collector, and the collected liquid is collected by the collector. It is distributed by distributors.
[0003]
By the way, the collector has a laminar type collector in which a plurality of collector laminas are formed in parallel, a plurality of dispersion holes formed in a bottom plate, and a chimney hat type in which a chimney rises upward from each dispersion hole. There is a collector etc. Further, the laminator-type collector includes an integrated collector in which a collector lamina, a collector box, and the like are unitized and sandwiched by a flange of a tower body (for example, see Patent Document 1).
[0004]
Next, the lamina type integral collector will be described.
[0005]
FIG. 2 is a sectional view showing a main part of a conventional distillation column having a lamina-type integral collector.
[0006]
In the figure, reference numeral 12 denotes a tower main body, which is not shown in the figure for supplying a stock solution M containing three components, for example, components A to C, into the tower main body 12 substantially at the center in the height direction of the tower main body 12. A supply port is formed. Component A has a lower boiling point than component B, and component B has a lower boiling point than component C. And the 1st, 2nd enrichment area | region AR11, AR12 is formed above the said supply port in the said tower main body 12, and each 1st, 2nd enrichment area | region AR11, AR12 consists of a regular packing (balance) thing. It is formed by filling the fillers pk1 and pk2 while being supported by the support grids gr1 and gr2, respectively.
[0007]
A liquid collecting and dispersing device 31 is provided between the first and second concentration regions AR11 and AR12. The liquid collecting and dispersing device 31 is a lamina-type integrated collector 32 for collecting the liquid that has descended from the first concentration region AR11, and disperses the liquid collected by the collector 32 to the second concentration region AR12 below. A tubular type distributor 33 is provided.
[0008]
The collector 32 includes a collector box 35 forming a liquid groove 34 along the inner peripheral wall of the tower body 12, a lamina support 37 provided between the inner peripheral walls 36 of the collector box 35, and a plurality of collectors 35 arranged along the lamina support 37. It is provided with the collector laminas 41 and 42 provided, the discharge pipe 38, etc., and is unitized and formed integrally. In addition, a flange portion 40 is formed at the upper end of the outer peripheral wall 39 of the collector box 35 toward the outside in the radial direction. Therefore, when assembling the tower main body 12, the collector 32 is connected to the tower main body 12 by sandwiching the flange portion 40 between the flanges fr1 and fr2 of the tower main body 12 and connecting the flanges fr1 and fr2 with fixing members such as bolts (not shown). Assembled. In this case, since the collector 32 is formed integrally and is detachably provided to the tower main body 12, maintenance and management of the liquid collecting and dispersing device 31 are facilitated.
[0009]
Each collector lamina 41 has a bent portion 44 at the upper end, an inclined portion 45 at the center, and a groove portion 46 at the lower end, and the central collector lamina 42 has two bent portions 44 and inclined portions 45 for one groove portion 46. The two inclined portions 45 are inclined toward a side away from the center of the tower main body 12. A plurality of the collector laminas 41 are disposed on both sides of the collector lamina 42, and the inclined portions 45 of the respective collector laminas 41 are inclined toward the side away from the center of the tower body 12. In addition, the tip of each bent portion 44 is overlapped with the groove 46 of the adjacent collector lamina 41, so that most of the descending liquid hits the inclined portion 45. The discharge pipe 38 sends the liquid collected and accumulated in the collector box 35 to the distributor 33.
[0010]
On the other hand, the distributor 33 has an open static pressure type stand pipe 52, a main header 53 which is horizontally extended at a lower end of the stand pipe 52, and radially distributes the liquid in the stand pipe 52, and a horizontally extending stand pipe 52. And a plurality of arm tubes 54 for distributing the liquid in the main header 53 in a direction perpendicular to the main header 53.
[0011]
Therefore, the liquid that has descended from the first enrichment region AR11 is received by the groove portion 46 or hits the inclined portion 45, flows along the inclined portion 45, and is received by the groove portion 46. Is moved in the horizontal direction, is sent to the liquid groove 34, is sufficiently mixed in the liquid groove 34, is stored in the stand pipe 52 through the discharge pipe 38, and is then moved to the main header 53 and the arm tube. It is dispersed toward the second enrichment area AR12 via 54.
[0012]
By the way, in general, in a distillation column, when each component is easily separated, when the purity required for each component after separation is relatively low, etc., the liquid is supplied from a predetermined position in the middle of the column body 12. Each component is separated by a side cut method of extracting a part of the components.
[0013]
Therefore, when the side cut method is applied to the distillation column shown in FIG. 2, for example, a side cut liquid discharge port 18 is formed between the first and second concentration regions AR11 and AR12 in the column main body 12, A part of the liquid (liquid rich in component B) collected by the collector 32 is discharged as a side cut liquid through the side cut liquid discharge port 18. Then, in order to send the liquid in the liquid groove 34 to the side cut liquid discharge port 18, a discharge port 56 is formed in the bottom wall 55 of the collector box 35, and one end of an “L” -shaped pipe (elbow) 57 is connected. By contacting the bottom wall 55, the liquid groove 34 communicates with the inside of the pipe 57, the other end of the pipe 57 is welded to the tower main body 12, and the side cut liquid discharge port 18 communicates with the pipe 57. ing.
[0014]
[Patent Document 1]
JP-A-11-314008
[0015]
[Problems to be solved by the invention]
However, in the conventional distillation column, since only one end of the tube 57 is brought into contact with the bottom wall 55, a gap is formed between the tube 57 and the bottom wall 55, and a liquid groove is formed. A part of the liquid that is going to enter the pipe 57 from inside the container 34 falls down inside the tower body 12 through the gap. As a result, the liquid cannot be uniformly dispersed in the second concentration area AR12, and the distillation efficiency is reduced.
[0016]
On the other hand, it is conceivable to weld one end of the pipe 57 to the bottom wall 55. However, if the one end of the pipe 57 is welded to the bottom wall 55, the maintenance and inspection of the liquid collecting and dispersing apparatus 31 are performed. Then, the collector 32 cannot be removed from the tower body 12.
[0017]
That is, in a distillation column having a lamina-type integral collector, it becomes difficult to separate each component by the side cut method.
[0018]
Therefore, it is conceivable to separate each component by a side cut method in a distillation column having a chimney hat type collector. Next, a distillation column having a chimney hat type collector will be described. In addition, about the thing which has the same structure as the distillation column provided with the lamina type integral collector, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
[0019]
FIG. 3 is a sectional view showing a main part of a distillation column having a conventional chimney hat type collector.
[0020]
In the figure, reference numeral 61 denotes a liquid collecting and dispersing device, which is a chimney hat type collector 62 for collecting liquid descending from the first concentration area AR11, and a liquid collected by the collector 62. A tubular distributor 33 for dispersing in the lower second concentration area AR12 is provided. Then, a side cut liquid discharge port 18 is formed between the first and second concentration regions AR11 and AR12 in the tower main body 12, and the liquid (component) collected by the collector 62 through the side cut liquid discharge port 18 is formed. B-rich liquid) is discharged as a side cut liquid.
[0021]
The collector 62 is disposed over the entire tower main body 12, collects liquid, and has a bottom plate 65 having a plurality of dispersion ports 64 formed at predetermined locations, and is raised upward from each of the dispersion ports 64. A chimney 67 having a vapor discharge port 66 formed at an upper end thereof, a cap 68 disposed above the chimney 67 at a predetermined gap from the upper end of the chimney 67, and passing through a center of the bottom plate 65. A cylindrical discharge pipe 71 having a liquid inlet 69 at an upper end and a liquid outlet 70 at a lower end, and the side cut liquid outlet at a predetermined position in a circumferential direction of the bottom plate 65. And a liquid groove 72 formed in communication with the liquid groove 18. In addition, fr3 and fr4 are flanges formed above the collector 62 in the tower body 12, and fr5 and fr6 are flanges formed below the collector 62 in the tower body 12.
[0022]
Therefore, the liquid that has descended from the first concentration area AR11 hits the cap 68 or is directly received by the bottom plate 65 and is stored on the bottom plate 65, and a part of the liquid is sent to the liquid groove 72. The remaining liquid discharged from the side cut liquid discharge port 18 flows into the discharge pipe 71 via the inlet 69 at the upper end of the discharge pipe 71, is discharged from the outlet 70 toward the distributor 33, and is stored in the stand pipe 52. After that, it is dispersed toward the second concentration area AR12 via the main header 53 and the arm tube 54.
[0023]
In addition, a line L-9 for discharging the side cut liquid is provided in communication with the side cut liquid discharge port 18, and a flow meter (FIC) 74 and a flow control valve 75 are provided in the line L-9. The flow control valve 75 can be adjusted based on the flow rate measured by the flow meter 74 to discharge a predetermined amount of side cut liquid.
[0024]
However, in a distillation column provided with a chimney hat type collector 62, the liquid collected by the collector 62 is discharged from the liquid groove 72 to the line L-9 without being sufficiently mixed. The components fluctuate and the side cut liquid cannot be taken out while stabilizing the components.
[0025]
An object of the present invention is to provide a distillation apparatus which can solve the problems of the conventional distillation apparatus, improve the distillation efficiency, and stabilize the components to take out a liquid. .
[0026]
[Means for Solving the Problems]
Therefore, in the distillation apparatus of the present invention, the column main body, the liquid groove formed along the inner peripheral wall of the column main body, and the discharge passage formed by projecting radially inward from the liquid groove. Comprising a collector that collects the liquid that has descended, and discharges the liquid from the discharge port of the discharge path, a discharge path that receives a part of the liquid discharged from the discharge port, and withdraws the liquid to the outside of the tower main body. And a distributor for receiving and dispersing it downward.
[0027]
Another distillation apparatus of the present invention further includes a scattering prevention member for preventing the liquid discharged from the discharge port from scattering.
[0028]
In still another distillation apparatus according to the present invention, the distributor further includes a receiving member arranged to face the discharge port and to receive the remaining liquid.
[0029]
In still another distillation apparatus of the present invention, the collector is a lamina-type integrated collector.
[0030]
In still another distillation apparatus of the present invention, the collector is a chimney hat type collector.
[0031]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0032]
FIG. 1 is a sectional view showing a main part of a distillation column according to a first embodiment of the present invention, FIG. 4 is a conceptual diagram of a distillation apparatus according to the first embodiment of the present invention, and FIG. It is a figure showing the attachment state of the guide member in an embodiment.
[0033]
In the drawing, reference numeral 11 denotes a distillation column used in a process apparatus, for example, a distillation apparatus, and, for example, three components, for example, in the center of a column body 12 as an outer casing of the distillation column 11 in the height direction. A supply port 13 to which the stock solution M containing A to C is supplied is formed. Component A has a lower boiling point than component B, and component B has a lower boiling point than component C. The distillation column 11 includes a first section SC1, a second section SC2, a third section SC3, a fourth section SC4, a fifth section SC5, a sixth section SC6, and a seventh section SC7, and the second section SC2, The enrichment section AR1 is formed in the third section SC3 and the fourth section SC4, and the recovery section AR2 is formed in the sixth section SC6, and the enrichment section AR1 and the recovery section AR2 form a plurality of theoretical stages.
[0034]
In the recovery section AR2, the undiluted solution M supplied via the line L-1 and the supply port 13 descends, and generates vapor rich in component A upward and liquid rich in component C downward, The liquid rich in component C falls. Then, the liquid rich in the component C is discharged as bottoms from the bottoms outlet 15 at the bottom of the tower body 12 to the line L-2. A part of the bottom liquid is sent to the evaporator 21 via the line L-3, turned into vapor by the evaporator 21, and the seventh section SC7 below the recovery section AR2 via the line L-4. Is supplied into the tower body 12 from a steam inlet 17 formed in the column. Subsequently, the vapor is supplied to the recovery part AR2 and, while rising inside the recovery part AR2, comes into contact with the stock solution M to generate a vapor rich in the component A from the stock solution M. The remainder of the bottoms is stored in a bottoms storage section (not shown) via the line L-5.
[0035]
Then, the vapor rich in the component A is supplied to the enrichment section AR1, rises in the enrichment section AR1, and is discharged from the vapor outlet 14 to the line L-6 at the top of the tower body 12. Subsequently, the vapor enriched in component A is sent to the condenser 22, where it is condensed into a liquid enriched in component A and discharged as a distillate to the line L-7, not shown. It is stored in the distillate storage part.
[0036]
In order to enhance the separation performance representing the process performance of the distillation column 11, a part of the distillate is concentrated through the reflux liquid inlet 16 formed above the concentration part AR1 and the line L-8. The liquid is returned to the part AR1 as a reflux liquid. Accordingly, the vapor enriched in the component A and the liquid enriched in the component A that rise in the enrichment section AR1 are brought into contact with each other, and the concentration of the component A is increased.
[0037]
Then, the liquid rich in the component B is discharged as a side cut liquid from the side cut liquid discharge port 18 as a liquid discharge port to the line L-9 in the concentration section AR1, as described later. The distillation column 11, the evaporator 21, the condenser 22, and the like constitute a distillation apparatus.
[0038]
Meanwhile, in the distillation column 11 having the above-described configuration, the packings pk1 to pk3 made of the structured packing are respectively provided in the second section SC2, the fourth section SC4, and the sixth section SC6 with the support grid (in FIG. 1, among them). Only the supporting grids gr1 and gr2 are shown), and the first and second enrichment regions AR11 and AR12 are filled in the second section SC2 and the fourth section SC4 by the respective packings pk1 to pk3. However, a recovery section AR2 is formed in the sixth section SC6.
[0039]
In this embodiment, two packings pk1 and pk2 are packed in the enrichment section AR1 and one packing pk3 is packed in the collection section AR2. However, the concentration section AR1 and the collection section AR2 are packed. Suffices to have at least one filling material, and the number of filling materials can be changed as needed.
[0040]
By the way, in the third section SC3, in order to efficiently collect the liquid descending in the first concentration area AR11 and uniformly disperse the liquid toward the second concentration area AR12, the first and second concentration areas AR11 are used. , AR12. The liquid collecting and dispersing device 31 is a lamina-type integrated collector 32 for collecting the liquid that has descended from the first concentration region AR11, and disperses the liquid collected by the collector 32 to the second concentration region AR12 below. A tubular type distributor 33 is provided.
[0041]
The collector 32 includes a collector box 35 forming a liquid groove 34 along the inner peripheral wall of the tower body 12, a lamina support 37 erected between the inner peripheral walls 36 of the collector box 35, and a predetermined along the lamina support 37. A plurality of collector laminas 41 and 42 arranged in parallel with each other at a pitch, a discharge pipe 38 as a discharge passage formed by projecting radially inward from a predetermined location in the circumferential direction of the liquid groove 34, and the like. And are unitized and integrally formed. Further, an annular flange portion 40 is formed at the upper end of the outer peripheral wall 39 of the collector box 35 toward the outside in the radial direction. Therefore, when assembling the tower main body 12, the collector 32 is connected to the tower main body 12 by sandwiching the flange portion 40 between the flanges fr1 and fr2 of the tower main body 12 and connecting the flanges fr1 and fr2 with fixing members such as bolts (not shown). Assembled. In this case, since the collector 32 is formed integrally and is removably disposed with respect to the tower body 12, not only the maintenance and management of the liquid collecting and dispersing device 31 is facilitated, but also the required height is reduced. Can be smaller. Therefore, the size of the distillation column 11 can be reduced. In addition, operations such as production and installation of the tower body 12 can be simplified.
[0042]
Furthermore, since the collector 32 is detachably mounted on the tower main body 12, it is only necessary to form the flanges fr1 and fr2 at one place around the liquid collecting and dispersing device 31 in the tower main body 12. Therefore, it is possible to prevent the liquid, vapor, and the like in the tower main body 12 from leaking out of the tower main body 12, stabilize the operation pressure inside the tower main body 12, and improve the distillation efficiency. Further, the cost of the distillation column 11 can be reduced.
[0043]
The collector laminas 41 and 42 are disposed so as to extend in the horizontal direction, collect and store the liquid that has descended from above, and send the collected liquid to the collector box 35. To this end, each collector lamina 41 has a bent portion 44 at the upper end, an inclined portion 45 at the center, and a groove 46 having a cross section having a U-shape at the lower end, and the central collector lamina 42 has one The groove portion 46 is provided with two bent portions 44 and two inclined portions 45, and the two inclined portions 45 are inclined toward a side away from the center of the tower body 12. A plurality of the collector laminas 41 are disposed on both sides of the collector lamina 42, and the inclined portions 45 of the respective collector laminas 41 are inclined toward the side away from the center of the tower body 12. In addition, the tip of each bent portion 44 is overlapped with the groove 46 of the adjacent collector lamina 41, so that most of the descending liquid hits the inclined portion 45.
[0044]
Further, the discharge pipe 38 sends the liquid stored in the collector box 35 to the distributor 33. To this end, the discharge pipe 38 extends from a predetermined location in the circumferential direction of the inner peripheral wall 36 toward the center of the tower body 12, is bent downward at the center, and a discharge port 77 is formed at the lower end. You.
[0045]
On the other hand, the distributor 33 is disposed opposite to the discharge port 77, and is an open static pressure type stand pipe 52 that accumulates liquid discharged from the discharge pipe 38 and generates a predetermined head pressure. A main header 53 extending horizontally at a lower end and radially distributing the liquid in the stand pipe 52; and a main header 53 connected to the main header 53 and extending horizontally. And a plurality of arm tubes 54 for distributing the liquid in a direction perpendicular to the main header 53. The stand pipe 52 has a larger diameter at the upper end and is disposed to face the discharge port 77 at the upper end so as to be able to reliably receive the liquid discharged from the discharge pipe 38. A funnel (and) -shaped expanded portion 60 is formed as a receiving member for receiving.
[0046]
Therefore, the liquid that has descended from the first enrichment region AR11 is received by the groove portion 46 or hits the inclined portion 45, flows along the inclined portion 45, and is received by the groove portion 46. Is moved in the horizontal direction, is sent to the liquid groove 34, is sufficiently mixed while flowing in the liquid groove 34 in the circumferential direction, and is then discharged from the discharge port 77 of the discharge pipe 38 to be expanded. After being received by 60 and stored in the stand pipe 52, it is dispersed toward the second concentration area AR 12 via the main header 53 and the arm tube 54.
[0047]
Then, the liquid dispersed by the arm tube 54 is further dispersed by the filler pk2 in the second concentration area AR12.
[0048]
By the way, in the present embodiment, since each of the components A to C is easily separated, each of the components A to C is separated by a side cut method in which a part of the liquid is taken out from a predetermined place in the middle of the distillation column 11. I try to separate them. In addition, even when the purity required for the components A to C after separation is relatively low, the components A to C can be separated by the side cut method.
[0049]
For this purpose, a side cut liquid outlet 18 is formed between the first and second enrichment areas AR11 and AR12 in the tower main body 12, and the liquid collected by the collector 32 via the side cut liquid outlet 18 is formed. A part of (liquid rich in component B) is discharged to line L-9 and stored in a side cut liquid storage unit (not shown).
[0050]
An extraction nozzle 79 as an extraction path is provided between the lower end of the discharge pipe 38 and the upper end of the stand pipe 52 with the extraction port 78 facing upward and facing the discharge port 77 at the lower end of the discharge pipe 38. Is arranged. The discharge nozzle 79 has an “L” shape, and extends vertically downward from a discharge port 78 formed in the center of the tower body 12 so as to face the discharge port 77, It bends and extends horizontally, and communicates with the side cut liquid discharge port 18. Therefore, a part of the liquid that has descended from above can be received and extracted outside the tower main body 12 by the extraction nozzle 79.
[0051]
A scattering prevention member 81 made of a plate having a half-moon shape is attached to a vertically extending pipe portion p1 of the extraction nozzle 79 via a predetermined arm 82, and the pipe portion p1 and the scattering prevention member 81 are attached. And a fan-shaped liquid flow path 83 is formed. The scattering prevention member 81 has an upper end higher than a lower end of the discharge pipe 38 and a position radially outward of the discharge pipe 38, a lower end lower than a lower end of the extraction nozzle 79, and It has such a size as to be located radially inward from the upper end of the nozzle 60 and prevents the liquid discharged from the discharge port 77 and hitting the extraction nozzle 79 from scattering around and guiding the liquid to the distributor 33. I do. Therefore, since the liquid discharged from the discharge port 77 is prevented from being scattered, the liquid can be uniformly dispersed downward and the distillation efficiency can be improved.
[0052]
Further, at a portion of the upper end of the pipe portion p1 facing the scattering prevention member 81, at least one notch 84 having a predetermined depth as an overflow portion is provided (two notches 84 in the present embodiment). It is formed. It should be noted that a slit can be formed instead of the notch 84 as the overflow portion. Further, the shape, number, and the like of the notches 84 can be changed in accordance with the flow rate of the liquid descending in the tower main body 12.
[0053]
Therefore, a part of the liquid discharged from the discharge port 77 enters the discharge nozzle 79 through the discharge port 78 and is sent to the side cut liquid discharge port 18, and the remaining liquid passes through the outer periphery of the pipe portion p 1. Is mainly supplied to the distributor 33 through the liquid flow path 83.
[0054]
The line L-9 is provided to discharge the side cut liquid by communicating with the side cut liquid discharge port 18, and a flow meter (FIC) 74 and a flow control valve 75 are provided in the line L-9. Is established. Therefore, the flow rate adjusting valve 75 can be adjusted based on the flow rate measured by the flow meter 74 to control the flow rate of the side cut liquid. The side cut liquid discharge port 18, the flow meter 74, the flow control valve 75, the discharge nozzle 79, the scattering prevention member 81 and the like constitute a liquid discharge device 80. In the present embodiment, the liquid that has descended from the first concentration area AR1 is sent to the liquid groove 34 of the collector 32, and is sufficiently mixed while flowing through the liquid groove 34, and then is discharged from the discharge pipe 38. It is discharged and enters the extraction nozzle 79.
[0055]
Therefore, since the sufficiently mixed liquid is extracted by the extraction nozzle 79, there is no variation in the components of the extracted liquid, and the side cut liquid can be extracted with the components stabilized.
[0056]
By the way, if the flow rate of the side cut liquid discharged from the side cut liquid discharge port 18 is reduced in accordance with the control of the flow rate of the side cut liquid, the sufficiently mixed liquid is once (once) once discharged to the outlet 78. After entering the extraction nozzle 79 through the notch 84, it overflows through the notch 84 and is supplied to the distributor 33. For example, in the case of performing a full reflux operation without extracting the descending liquid, such as when starting the operation of the distillation column 11, the descending liquid is not sent into the extraction nozzle 79, and the distributor 33 Supplied to
[0057]
Therefore, the sufficiently mixed liquid is uniformly dispersed toward the second concentration area AR12 by the distributor 33, so that the distillation efficiency can be improved.
[0058]
Next, a second embodiment of the present invention in which a plurality of liquid extracting devices are provided in the distillation column 11 will be described.
[0059]
FIG. 6 is a schematic diagram of a distillation column according to the second embodiment of the present invention.
[0060]
In this case, a supply port 13 to which a stock solution M containing, for example, three components A to C is supplied is formed substantially at the center in the height direction of the tower body 12 as an outer casing. Is connected. A flow meter (FIC) 91 and a flow control valve 92 are provided on the line L-1. Accordingly, the flow rate of the stock solution M can be controlled by adjusting the flow rate adjusting valve 92 based on the flow rate measured by the flow meter 91.
[0061]
The distillation column 11 includes a first section SC11, a second section SC12, a third section SC13, a fourth section SC14, a fifth section SC15, a sixth section SC16, a seventh section SC17, and an eighth section SC18. A condenser 122 is formed in one section SC11, a concentrating section AR1 is formed in a third section SC13, and a collecting section AR2 is formed in a fifth section SC15 and a seventh section SC17. A plurality of theoretical stages are formed by the concentrating section AR1 and the collecting section AR2. Be composed. The collection section AR2 includes first and second collection areas AR21 and AR22.
[0062]
In the recovery section AR2, the undiluted solution M supplied via the line L-1 and the supply port 13 descends, and generates vapor rich in component A upward and liquid rich in component C downward, The liquid rich in component C falls. Then, the liquid rich in the component C is discharged as bottoms from a bottoms outlet (not shown) at the bottom of the tower body 12.
[0063]
On the other hand, the vapor enriched in the component A is supplied to the enrichment section AR1, rises in the enrichment section AR1, and is condensed by the condenser 122 at the top of the tower body 12 to become a liquid enriched in the component A. The tower body 12 can be lowered. In the second section SC12, a liquid collecting and dispersing device 31 is provided between the condenser 122 and the concentrating unit AR1 in order to efficiently collect the descending liquid and uniformly disperse the liquid toward the concentrating unit AR1. Is done.
[0064]
The liquid collecting and dispersing device 31 includes a lamina-type integrated collector 32 for collecting the liquid descending from the condenser 122 and a tubular distributor 33 for dispersing the liquid collected by the collector 32 to a lower concentration part AR1. Is provided. Then, an extraction nozzle 79 as an extraction path is disposed between the lower end of the discharge pipe 38 as the discharge path and the upper end of the stand pipe 52, and the scattering prevention member 81 is attached to the extraction nozzle 79.
[0065]
Therefore, the liquid discharged from the discharge port 77 (FIG. 1) of the discharge pipe 38 becomes a distillate, enters the discharge nozzle 79 via the discharge port 78, and is sent to the distillate liquid outlet 89. Further, a line L-11 for discharging the distillate in communication with the distillate outlet 89 is provided, and a flow meter (FIC) 74 and a flow control valve 75 are provided in the line L-11. You. Therefore, the flow rate control valve 75 can be adjusted based on the flow rate measured by the flow meter 74 to control the flow rate of the distillate.
[0066]
Then, a part of the distillate is refluxed as a reflux liquid and supplied to the distributor 33 in order to enhance the separation performance representing the process performance of the distillation column 11. Along with this, the vapor enriched in the component A rising in the enrichment section AR1 is brought into contact with the reflux liquid, and the concentration of the component A is increased. The flow meter 74, the flow control valve 75, the extraction nozzle 79, the scattering prevention member 81, the distillate outlet 89, etc. constitute a liquid extraction device 95.
[0067]
Further, in the fourth section SC14, in order to efficiently collect the liquid descending from the concentrating unit AR1 and to uniformly disperse the liquid together with the stock solution M toward the first collecting area AR21, the concentrating unit AR1 and the first collecting unit A liquid collecting and dispersing device 31 is provided between the region AR21. The liquid collecting and dispersing device 31 is a lamina-type integrated collector 32 for collecting the liquid descending from the concentrating unit AR1, and a tubular type for dispersing the liquid collected by the collector 32 to a first recovery area AR21 below. Is provided.
[0068]
A supply nozzle 96 is provided between a lower end of the discharge pipe 38 and an upper end of the stand pipe 52, and the supply nozzle 96 is connected to the supply port 13. Therefore, the stock solution M supplied to the supply port 13 can be supplied to the distributor 33 via the supply nozzle 96, and can be dispersed in the first recovery area AR21 together with the liquid collected by the collector 32.
[0069]
Further, in the sixth section SC16, in order to efficiently collect the liquid descending in the first recovery area AR21 and uniformly disperse the liquid toward the second recovery area AR22, the first and second recovery areas AR21 are used. , AR22. The liquid collecting and dispersing device 31 is a lamina-type integrated collector 32 for collecting the liquid that has descended from the first recovery area AR21, and disperses the liquid collected by the collector 32 to a lower second recovery area AR22. A tubular type distributor 33 is provided.
[0070]
An extraction nozzle 79 is provided between the lower end of the discharge pipe 38 and the upper end of the stand pipe 52, and the scattering prevention member 81 is attached to the extraction nozzle 79. Therefore, part of the liquid (liquid rich in component B) discharged from the discharge port 77 of the discharge pipe 38 enters the extraction nozzle 79 and is sent to the side cut liquid discharge port 18, and the rest of the liquid is Are supplied to the distributor 33 and are uniformly dispersed toward the second collection area AR22.
[0071]
Further, a line L-9 for discharging the side cut liquid in communication with the side cut liquid discharge port 18 is provided, and a flow meter (FIC) 74 and a flow control valve 75 are provided in the line L-9. Is done. Therefore, the flow rate adjusting valve 75 can be adjusted based on the flow rate measured by the flow meter 74 to control the flow rate of the side cut liquid. The side cut liquid discharge port 18, the flow meter 74, the flow control valve 75, the discharge nozzle 79, the scattering prevention member 81 and the like constitute a liquid discharge device 80.
[0072]
As described above, since the liquid sufficiently mixed in the liquid groove 34 is extracted by the extraction nozzle 79, there is no variation in the components of the extracted liquid, and the distillate or side liquid is stabilized by stabilizing the components. The cutting liquid can be taken out.
[0073]
In addition, any remaining liquid that does not enter the extraction nozzle 79 via the extraction outlet 78 is sent to the distributor 33. Therefore, the liquid can be uniformly dispersed toward the concentration section AR1 or the second recovery area AR22, and the distillation efficiency can be improved.
[0074]
Next, a third embodiment of the present invention having a chimney hat type collector will be described.
[0075]
FIG. 7 is a sectional view showing a main part of a distillation column having a chimney hat type collector according to the third embodiment of the present invention.
[0076]
In the figure, reference numeral 61 denotes a liquid collecting and dispersing device, which is a chimney hat type collector 62 for collecting liquid descending from the first concentration area AR11, and a liquid collected by the collector 62. A tubular distributor 33 for dispersing in the lower second concentration area AR12 is provided. Then, a side cut liquid discharge port 18 is formed between the first and second concentration regions AR11 and AR12 in the tower main body 12, and the liquid (component) collected by the collector 62 through the side cut liquid discharge port 18 is formed. B-rich liquid) is discharged as a side cut liquid.
[0077]
The collector 62 is disposed over the entire tower main body 12, collects liquid, and has a bottom plate 65 having a plurality of dispersion ports 64 formed at predetermined locations, and is raised upward from each of the dispersion ports 64. A chimney 67 having a vapor discharge port 66 formed at the upper end, a cap 68 disposed above the chimney 67 at a predetermined gap from the upper end of the chimney 67, and a circumferential direction of the bottom plate 65, A collector box 135 formed along the inner peripheral wall of the tower main body 12 and forming the liquid groove 134, and protrudes radially inward from a predetermined location in the circumferential direction of the inner peripheral wall 136 of the collector box 135. A discharge pipe 38 and the like as a formed discharge path are provided. In addition, fr3 and fr4 are flanges formed above the collector 62 in the tower body 12, and fr5 and fr6 are flanges formed below the collector 62 in the tower body 12.
[0078]
Therefore, the liquid that has descended from the first concentration area AR11 hits the cap 68 or is received directly by the bottom plate 65 and is stored on the bottom plate 65, and then is sent to the liquid groove 134 and After being sufficiently mixed while flowing in the groove 134 in the circumferential direction, the liquid is discharged from the discharge port 77, and a part of the liquid enters the discharge nozzle 79 as a discharge path via the discharge port 78, and the side cut liquid is removed. It is sent to the outlet 18 and the rest is supplied to the distributor 33. Then, the liquid is received by the expanding portion 60 as a receiving member, is stored in the stand pipe 52, and is dispersed toward the second concentration area AR12 via the main header 53 and the arm tube 54.
[0079]
Further, a line L-9 for discharging the side cut liquid by communicating with the side cut liquid discharge port 18 is provided, and a flow meter (FIC) 74 and a flow control valve 75 are provided on the line L-9. Is done. Therefore, the flow rate adjusting valve 75 can be adjusted based on the flow rate measured by the flow meter 74 to control the flow rate of the side cut liquid. The side cut liquid discharge port 18, the flow meter 74, the flow control valve 75, the discharge nozzle 79, the scattering prevention member 81 and the like constitute a liquid discharge device 80.
[0080]
As described above, since the liquid sufficiently mixed in the liquid groove 134 is extracted by the extraction nozzle 79, the components of the extracted liquid do not vary, and the side cut liquid is extracted while the components are stabilized. be able to.
[0081]
In addition, any remaining liquid that does not enter the extraction nozzle 79 via the extraction outlet 78 is sent to the distributor 33. Therefore, the liquid can be uniformly dispersed toward the second concentration region AR12, and the distillation efficiency can be improved.
[0082]
In each of the above embodiments, the liquid extracting devices 80 and 95 for extracting the side cut liquid, the distillate, and the like are described. However, in order to extract the liquid in the distillation column 11 (FIG. 6) as the sampling liquid. A liquid extraction device having the same structure as that of the liquid extraction devices 80 and 95 can be provided.
[0083]
Further, in each of the above embodiments, the distillation column 11 separates the stock solution M containing the three components A to C into the components A to C. However, the stock solution containing the two components A and B is used. M can be separated into components A and B, or a stock solution containing four or more components, for example, components AD can be separated into components AD.
[0084]
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.
[0085]
【The invention's effect】
As described above in detail, according to the present invention, in the distillation apparatus, the column main body, the liquid groove formed along the inner peripheral wall of the column main body, and radially inward from the liquid groove. A collector formed to protrude and collect the liquid which has descended, and a collector for discharging the liquid discharged from the discharge port of the discharge path; An outlet and a distributor for receiving and dispersing the remainder of the liquid downward.
[0086]
In this case, since the liquid that has been sufficiently mixed in the liquid groove is extracted by the extraction path, the components of the extracted liquid do not vary, and the liquid can be extracted stably.
[0087]
In addition, the remainder of the liquid that does not enter the extraction path is sent to the distributor. Therefore, the liquid can be uniformly dispersed downward, and the distillation efficiency can be improved.
[0088]
Another distillation apparatus of the present invention further includes a scattering prevention member for preventing the liquid discharged from the discharge port from scattering.
[0089]
In this case, since the liquid discharged from the discharge port is prevented from being scattered, the liquid can be uniformly dispersed downward and the distillation efficiency can be improved.
[0090]
In still another distillation apparatus of the present invention, the collector is a lamina-type integrated collector.
[0091]
In this case, the collector can be freely attached to and detached from the column main body, which not only facilitates the maintenance and management of the liquid collecting and dispersing apparatus, but also reduces the required height. Can be In addition, operations such as production and installation of the tower body can be simplified.
[0092]
Further, since the collector is detachably mounted on the tower main body, it is only necessary to form a flange at one location around the collector in the tower main body. Therefore, it is possible to suppress leakage of liquid, vapor, and the like in the tower main body to the outside of the tower main body, to stabilize operation pressure in the tower main body, and to improve distillation efficiency. Further, the cost of the distillation column can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a main part of a distillation column according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a main part of a conventional distillation column having a lamina-type integral collector.
FIG. 3 is a cross-sectional view showing a main part of a distillation column having a conventional chimney hat type collector.
FIG. 4 is a conceptual diagram of a distillation apparatus according to the first embodiment of the present invention.
FIG. 5 is a diagram illustrating a mounting state of a guide member according to the first embodiment of the present invention.
FIG. 6 is a schematic diagram of a distillation column according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a main part of a distillation column having a chimney hat type collector according to a third embodiment of the present invention.
[Explanation of symbols]
11 Distillation tower
12 Tower body
21 Evaporator
22 Condenser
32, 62 Collector
33 Distributor
34, 134 liquid groove
38 Discharge pipe
60 Expansion part
77 outlet
79 Extraction nozzle
81 Shatterproof material

Claims (5)

(A) a tower body;
(B) a liquid groove formed along the inner peripheral wall of the tower main body, and a discharge path formed so as to protrude radially inward from the liquid groove, to collect the liquid which has descended and discharge the liquid. A collector discharging from the outlet of the road,
(C) an extraction path for receiving a part of the liquid discharged from the discharge port and extracting the liquid outside the tower main body;
(D) a distributor for receiving the remaining liquid and dispersing it downward. The distillation apparatus according to claim 1, further comprising a scattering prevention member configured to prevent the liquid discharged from the discharge port from scattering. 2. The distillation apparatus according to claim 1, wherein the distributor is provided to face the discharge port, and has a receiving member that receives the remaining liquid. 3. The distillation apparatus according to claim 1, wherein the collector is a lamina-type integral collector. The distillation apparatus according to claim 1, wherein the collector is a chimney hat type collector.

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