JP2002066204A - Distillation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distillation device capable of removing impurities from a product and preventing the product from being affected by hue and smell. SOLUTION: This distillation device is composed of a tower body, an inner partition dividing the inside of the tower body, a first distillation part equipped with a concentration part and a recovering part, to which a stock solution M containing a low boiling point ingredient, a medium boiling point ingredient and a high boiling point ingredient is supplied via feed nozzle 41, a second distillation part equipped with a concentration part and a revering part, which is connected with the upper end of the first distillation part, a third distillation part equipped with a concentration part and a recovering part, a condenser 81 arranged at the tower top, which condenses a vapor enriched in the low coiling point ingredient, a side cut nozzle 42 arranged at the side of the tower, which withdraws a liquid enriched in the medium boiling point ingredient as a product, an evaporator 82 arranged at the tower bottom, which generates a vapor by heating a liquid enriched in the high boiling point ingredient, and a cooler 92 which cools the product and is connected to the side cut nozzle 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a distillation apparatus.

[0002]

2. Description of the Related Art Conventionally, various distillation apparatuses have been provided for distilling a stock solution containing a plurality of components to separate each component and recovering a predetermined component as a product.

[0003] For example, in a stock solution containing three components A to C, the boiling point of component A is lower than the boiling point of component B, the boiling point of component B is lower than the boiling point of component C, and When the medium-boiling component is constituted by B and the high-boiling component is constituted by component C, the undiluted solution is distilled by the following distillation apparatus, and the components A to C are separated.

FIG. 2 is a conceptual diagram of a conventional distillation apparatus.

[0005] In the figure, reference numeral 201 denotes a first distillation column;
2 is a second distillation column, 203 and 205 are evaporators, 204,
206 is a condenser. The first distillation column 201 has a first section 21 formed in order from the top to the bottom.
The first section 215 includes a first section 215 and a fifth section 215. The second section 212 and the fourth section 214 are provided with unillustrated filler elements, and form a concentration section and a recovery section, respectively. The second distillation column 202 has a first distillation column formed in order from the top to the bottom.
The second section 217 and the fourth section 21 of the section 216 to the fifth section 220 are included.
In 9, the packing element is disposed, and a concentrating section and a collecting section are respectively formed.

[0006] For example, the stock solution M containing three components A to C is supplied to the third section 21 of the first distillation column 201.
3, the vapor rich in components A and B is discharged at the top of the first distillation column 201 and sent to the condenser 204, where it is condensed in the condenser 204 and concentrated in components A and B. The liquid rich in the components A and B is discharged from the condenser 204 as a distillate. Further, a part of the distillate is refluxed into the first distillation column 201 as a reflux, and the remainder of the distillate is supplied to the third section 218 of the second distillation column 202.

On the other hand, the liquid rich in the component C is discharged as bottom product at the bottom of the first distillation column 201. Then, a part of the bottom liquid is sent to the evaporator 203 and is heated in the evaporator 203 to become a vapor rich in the component C. The vapor rich in the component C is sent to the first distillation column 201. It is circulated and the remainder of the bottoms is discharged outside.

When the distillate is supplied to the third section 218, the vapor rich in the component A is discharged at the top of the second distillation column 202 and sent to the condenser 206 where the vapor is enriched. The liquid is condensed into a liquid rich in the component A, and the liquid rich in the component A is converted into a distillate by the condenser 206.
Is discharged from Then, a part of the distillate is refluxed into the second distillation column 202 as a reflux liquid, and the remainder of the distillate is discharged to the outside.

On the other hand, the liquid rich in the component B is discharged as bottom liquid at the bottom of the second distillation column 202. Then, a part of the bottom liquid is sent to the evaporator 205 and is heated in the evaporator 205 to be a vapor rich in the component B. The vapor rich in the component B is sent to the second distillation column 202. It is circulated and the remainder of the bottoms is discharged outside.

When the component C cannot be sufficiently separated in the first distillation column 201,
In the distillation column 202, the component C collects as an impurity in the vicinity of the bottom of the column in the column body. Components B and C are:
When heated by the evaporators 203, 205, etc., it is decomposed into high-boiling components B ', C', which are also high in boiling point. It collects as impurities near the bottom. Therefore, when component B is recovered as a product, component C, altered component B ′,
The product is recovered while containing impurities such as C '. As a result, since the component C and the altered components B 'and C' have a large carbon molecular weight, the product is affected by hue, fragrance, and the like.

Further, since the product is collected at the bottom of the second distillation column 202, the product is exposed (exposed) to a high temperature by the evaporator 205 provided at the bottom of the second distillation column 202. As a result, the component B, which is a product, is decomposed, and an altered component B ′ having a high boiling point is formed, thereby deteriorating the quality of the product.

Therefore, there is provided a distillation apparatus that recovers a product in a vapor state, instead of recovering the product in a liquid state.

FIG. 3 is a conceptual view of a conventional distillation apparatus for recovering a product in a vapor state. In addition, about what has the same structure as FIG. 2, the description is abbreviate | omitted by attaching the same code | symbol.

In this case, the second distillation column 202 includes first sections 216 to 216 formed sequentially from the top to the bottom.
It comprises a fourth section 219, a fifth section 231 to a seventh section 233, of which the second section 2
A packing element is provided in the 17th and 4th sections 219, a concentration section and a recovery section are respectively formed, and a demister is provided in the 6th section 232.

The vapor enriched in the component B is recovered as a product from the fifth section 231 in a vapor state, and supplied to a condenser 236 via a control valve 235.
In 6, the liquid is condensed into a liquid rich in component B, and the liquid rich in component B is discharged from the condenser 236 as bottom liquid. Then, the bottom liquid is supplied to the receiver 237 and accumulated therein, and then discharged from the receiver 237.

The distillation is performed in a low temperature range to prevent the quality of the product from deteriorating.
In order to reduce the energy consumed when a part of the bottom liquid is heated in 3, 205, the condenser 20 is used.
4 and 206, the vacuum generator 238 is provided with the condenser 236.
Is provided with a vacuum generator 239, and the vacuum generator 23
8, 239, the first and second distillation columns 201, 202
A negative pressure is generated within. Therefore, the bottom liquid can be easily turned into vapor, and the vent gas generated in the first and second distillation columns 201 and 202 can be sucked and released into the atmosphere.

In this case, even if impurities collect in the second distillation column 202 near the bottom of the column in the column main body,
Since the component B-rich vapor is recovered as a product from the fifth section 231, the product is not recovered while containing impurities. As a result, it is possible to prevent the product from being affected by hue, fragrance, and the like. Further, since the product is not recovered at the bottom of the second distillation column 202 and is discharged from the fifth section 231, the product is not exposed to a high temperature by the evaporator 205 disposed at the bottom. As a result, the quality of the product can be improved. Note that impurities collected near the bottom of the tower in the tower body are discharged via a line L240.

Further, there is provided a distillation apparatus which recovers a product in a liquid state and removes impurities contained in the product.

FIG. 4 is a conceptual view of a conventional distillation apparatus for removing impurities contained in a product. Note that FIG.
Components having the same structures as those of the first and third embodiments are denoted by the same reference numerals, and description thereof is omitted.

In this case, the liquid rich in the component B is recovered as a bottom liquid and a product from the fifth section 220 and supplied to the receiver 242 via the control valve 241. The receiver 242 and the heater 244 are connected to each other, and the product in the receiver 242 is supplied to the heater 244, and is evaporated in the heater 244 into a component B-rich vapor. And the impurities such as component C and altered components B 'and C' are separated. Then, the vapor enriched in the component B is supplied to the receiver 2 with the impurities removed.
Return to 42.

Subsequently, the component B-rich vapor is supplied to a product condenser 243, where it is condensed into a component B-rich liquid. 243. Then, the liquid rich in the component B is supplied to the reservoir 245 and stored, and then discharged from the reservoir 245 via the control valve 246. When such an operation is performed for a predetermined time, impurities remain in the receiver 242, and the impurities are removed via the line L248. 247 is a vacuum generator.

[0022]

However, in the above-mentioned conventional distillation apparatus, in the case of a distillation apparatus in which the product is recovered in a vapor state, the control valve 235 and the condenser 23 are used.
6. In the case of a distillation apparatus that requires auxiliary equipment such as a receiver 237 and recovers the product in a liquid state and removes impurities contained in the product, control valves 241 and 246, a receiver 242, Auxiliary equipment such as the H.245, the condenser 243, and the heater 244 are required, which not only increases the size of the distillation apparatus but also increases the cost.

In addition, complicated equipment is required to control the operation of the distillation apparatus and to perform maintenance. In particular, in the case of a distillation apparatus in which the product is recovered in a vapor state, it is necessary to operate the control valve 235 to control the flow rate of the vapor when discharging the vapor from the fifth section 231. Is extremely complicated, which increases the cost of the distillation apparatus.

The present invention solves the problems of the conventional distillation apparatus, removes impurities from the product, prevents the product from being affected by hue, scent, and the like. It is an object of the present invention to provide a distillation apparatus that can be reduced in size and cost.

[0025]

For this purpose, in the distillation apparatus of the present invention, there is provided a column main body, and a partition partitioning the column main body and forming a first chamber and a second chamber adjacent to each other, An undiluted solution containing a low-boiling component, a medium-boiling component and a high-boiling component is supplied via a feed nozzle, and includes a concentration unit formed above the feed nozzle, and a recovery unit formed below the feed nozzle. A first distillation section connected to an upper end of the first distillation section, an enrichment section formed above the upper end, and a first distillation section formed below the upper end, and via a partition. A second distillation section having a recovery section adjacent to the enrichment section of the distillation section, and a lower end of the first distillation section connected to and formed above the lower end;
And a concentration section adjacent to the recovery section of the first distillation section via a middle partition, and a third distillation section including a recovery section formed below the lower end, and disposed at the top of the column, A condenser that condenses vapor rich in low-boiling components discharged at the top of the tower, and a side cut nozzle that is disposed on the tower side and discharges a liquid rich in medium-boiling components discharged on the tower side as a product, An evaporator is provided at the bottom of the tower to heat the liquid rich in high boiling point components discharged at the bottom of the tower to generate steam, and a cooler connected to the side cut nozzle to cool the product.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a conceptual diagram of a distillation apparatus according to an embodiment of the present invention, and FIG. 5 is a conceptual diagram of a combined distillation column according to an embodiment of the present invention.

In the figure, 10 is a combined distillation column,
The combined distillation column 10 is a first distillation column from the top to the bottom.
Section 11, second section 12, third section 13, fourth section 14, fifth section 15, sixth section
It comprises a section 16, a seventh section 17, an eighth section 18, and a ninth section 19.

In the fourth section 14, the fifth section 15 and the sixth section 16, the column main body of the combined distillation column 10 has a first chamber on the stock solution supply side by plate-shaped partitions 22 to 24, respectively. 14A-16
A and the second chambers 14B to 16B on the side of the side cut liquid discharge side, the first chambers 14A to 16A and the second chambers 14B to 16B.
B are adjacent to each other. Also, the first chamber 14A
16A, the first distillation section 25 is formed by the first section 11, the second section 12, the third section 13, and the second chamber 14B.
The third distillation section 2 is formed by the chambers 15B, 16B, the seventh section 17, the eighth section 18, and the ninth section 19.
7 are formed respectively.

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 to form a heat insulating structure. In this case, 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 15A and the second chamber 14B.
Since the heat transfer between 6A and the second chamber 16B can be respectively reduced, the efficiency of distillation can be increased.

The fifth section 15 is disposed substantially at the center of the combined distillation column 10 in the height direction, and the feed nozzle 41 is provided in the first chamber 15A on the side of the column, and the second chamber 15B is similarly provided on the side of the column. Side cut nozzles 42 are formed respectively. Further, the first section 11 is disposed at the top of the combined distillation column 10,
1, a vapor outlet 43 and a reflux liquid inlet 44 are respectively formed by being connected to a condenser 81. Further, a ninth section 19 is provided at the bottom of the combined distillation column 10, and the ninth section 19 is connected to the evaporator 82 and connected to the bottoms outlet 4.
5 and a steam inlet 46 are respectively formed.

In the combined distillation column 10 having the above-described structure, a stock solution M containing three components A to C is supplied to the feed nozzle 41 via a line L51. In addition, the boiling point of the component A is lower than the boiling point of the component B, the boiling point of the component B is lower than the boiling point of the component C.
Component B constitutes a medium boiling component and component C constitutes a high boiling component. Components B and C are made of a material having a high melting point.

In the first distillation section 25, the enrichment section AR1 is recovered by the first chamber 14A disposed above the feed nozzle 41, and recovered by the first chamber 16A disposed below the feed nozzle 41. The portions AR2 are respectively formed. The second distillation section 26 is connected to the upper end of the first distillation section 25, and the enrichment section AR3 is formed by the second section 12 disposed above the upper end.
Below the upper end of the first distillation section 25, the recovery sections AR4 are respectively formed by the second chambers 14B disposed adjacent to the enrichment section AR1. Further, the third distillation section 27 is connected to the lower end of the first distillation section 25, and the enrichment section AR5 is provided above the lower end by the second chamber 16B disposed adjacent to the recovery section AR2.
However, the recovery sections AR6 are respectively formed by the eighth sections 18 disposed below the lower end of the first distillation section 25.

As described above, the upper end of the first distillation unit 25 is located substantially at the center of the second distillation unit 26 in the height direction, and the lower end of the first distillation unit 25 is located in the height direction of the third distillation unit 27. Are connected approximately at the center.

The collector 5 is added to the third section 13.
4 and a channel-type distributor 61 are provided, and the liquid collected by the collector 54 is supplied to the distributor 61 by the distributor 61 at a predetermined distribution ratio.
Different amounts are distributed to the chamber 14A and the second chamber 14B.

A collector 62 is disposed immediately above the feed nozzle 41 in the first chamber 15A, and a tubular distributor 63 is disposed immediately below the feed nozzle 41.
The liquid collected by the distributor 6 together with the stock solution M supplied through the feed nozzle 41
3 to the first chamber 16A.

On the other hand, a chimney hat type collector 65 is provided immediately above the side cut nozzle 42 in the second chamber 15B.
However, a tubular type distributor 66 is disposed immediately below, and the liquid collected by the collector 65 is:
The liquid is discharged from the side cut nozzle 42 as a side cut liquid and is supplied to the second chamber 16B by the distributor 66.

Further, the collector 6 is added to the seventh section 17.
7 and a tubular type distributor 68 are disposed, and the liquid that has moved downward from the first chamber 16A and the second chamber 16B is collected by the collector 67,
The eighth section 1 by the distributor 68
8 is supplied.

In the distillation apparatus having the above-described configuration, in the recovery section AR2, the stock solution M supplied from the feed nozzle 41 moves downward, and the vapor rich in the components A and B is moved upward, and the component B is discharged downward. And a liquid rich in components B and C is supplied from the lower end of the first distillation section 25 to the third distillation section 27.

Further, the liquids rich in the components B and C are:
The mixture is heated in the third distillation section 27 to become a vapor rich in the components B and C, and the vapor rich in the components B and C is transferred to the undiluted solution M while moving upward in the recovery section AR2.
To generate a vapor rich in components A and B from the stock solution M.

Subsequently, the vapors rich in components A and B are:
The first distillation section 25 moves upward in the concentration section AR1.
Is supplied to the second distillation section 26 from the upper end of the second distillation section 26. 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 unit AR1, and is brought into contact with the vapor rich in the components A and B that can be moved upward in the concentrating unit 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.

In the recovery section AR6, the liquids rich in the components B and C move downward, and generate 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 component C is discharged from the bottom discharge outlet 45 to the line L52 as bottom liquid.

A part of the bottom liquid is sent to an evaporator 82 via a line L53, and is heated by the evaporator 82 to become a component-rich vapor. The steam rich in the component C is sent to the steam inlet 46 via the line L54, is supplied from the steam inlet 46 to the ninth section 19, and moves upward in the ninth section 19 and the recovery part AR6. During this time, it comes into contact with the liquids rich in components B and C and generates a vapor rich in component B from the liquids rich in components B and C. Also, the remainder of the bottoms is in line L
It is supplied to a bottoms storage section (not shown) via 55.

Subsequently, a part of the vapor enriched in the component B moves upward in the enrichment section AR5, and flows into the third distillation section 27.
At the upper end thereof, comes into contact with the liquid rich in component B from the second distillation section 26 to become a liquid rich in component B. Thus, the liquid rich in the component B obtained at the upper end of the third distillation section 27 is discharged from the side cut nozzle 42 to the line L56 as a side cut liquid. And
The side cut liquid discharged to the line L56 is supplied to the cooler 9
After being cooled by the cooler 92, it is discharged to the line L63 and is supplied to a side cut liquid storage unit (not shown) via the line L63.

On the other hand, the recovery section AR of the second distillation section 26
In 4, the liquids rich in components A and B move downward, producing vapors rich in component A above and liquids rich in component B downward. In this way, the liquid rich in component B obtained at the lower end of the second distillation section 26 is discharged from the side cut nozzle 42 to the line L56 as the side cut liquid.

Then, the vapor rich in the component A moves upward in the enrichment section AR3, is discharged from the vapor outlet 43 to the line L57, is sent to the condenser 81, and is condensed by the condenser 81. To become a liquid rich in component A,
The liquid rich in the component A is discharged to a line L58 as a distillate. Further, in order to increase the efficiency of distillation of the component A, a part of the distillate is sent to the reflux liquid inlet 44 via the line L59, and from the reflux liquid inlet 44, the condensing section AR3
And is brought into contact with vapors rich in components A and B which are moved upward in the enrichment section AR3. And
The remainder of the distillate is supplied to a distillate storage unit (not shown) via a line L60.

It is preferable to lower the temperature of the evaporator 82 in order to reduce the energy consumed when heating a part of the bottom liquid in the evaporator 82. Then, it becomes difficult to convert the bottoms into steam. Then, the line L61 is connected to the condenser 81.
A vacuum generator 91 as a negative pressure generating means is connected via the. And the vacuum generator 91 generates a negative pressure in the combined distillation column 10. Therefore, the bottom liquid can be easily turned into steam, and the vent gas generated in the combined distillation column 10 can be sucked and released into the atmosphere.

Thus, the vapor rich in components A and B is separated into the vapor rich in component A and the liquid rich in component B in the second distillation section 26, and The vapor is discharged at the top of the tower and condensed by the condenser 81 to become a liquid rich in the component A, and the liquid rich in the component B is converted into a side cut liquid by the side cut nozzle 4.
Exhausted from 2. The liquid rich in components B and C is separated into a liquid rich in component B and a liquid rich in component C in the third distillation section 27, and the liquid rich in component B is used as a side cut liquid. Side cut nozzle 42
And the liquid enriched in component C is discharged at the bottom of the column.

In this way, the stock solution M can be separated into the components A to C without using a plurality of distillation columns.

Therefore, since it is not necessary to repeat heating and cooling in a plurality of distillation columns, there is no need to provide a large number of instrumentation equipment such as a condenser, an evaporator, and a pump. 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.

By the way, in the present embodiment, the component B
The liquid rich in component C is concentrated in the second chamber 15B and discharged as a product from the side of the tower via the side cut nozzle 42, while the liquid rich in component C is concentrated in the first chamber 16B.
A, and after being further concentrated in the second section 16B and further concentrated in the eighth section 18, the bottoms outlet 4
5 is discharged. The degenerated components B 'and C' formed by decomposing the components B and C are collected near the bottom of the column in the column body, and then discharged from the column bottom through the bottom outlet 45.

Therefore, the component C and the altered components B 'and C'
And the component B do not come into contact in a liquid state, so that the product is not recovered while the component C, the altered components B 'and C' are contained as impurities. as a result,
It is possible to prevent the product from being affected by hue, fragrance and the like.

Also, a control valve, a product condenser, a receiver,
Since an auxiliary device such as a heater is not required, the size of the distillation apparatus can be reduced, and the cost of the distillation apparatus can be reduced. In addition, equipment for managing the operation of the distillation apparatus and performing maintenance can be simplified. Further, since the product can be recovered in a liquid state, control of the flow rate of the product can be extremely simplified, and the cost of the distillation apparatus can be reduced.

Further, since the product is collected on the side of the tower, the evaporator 82 provided at the bottom of the tower is used.
No exposure to high temperatures. Moreover, there is no need to further heat the product with a heater. Therefore, formation of the altered component B 'in the product can be prevented, and the quality of the product can be improved.

The product recovered on the side of the tower is immediately cooled by the cooler 92, so that the component B is not decomposed by the heat of the product itself. Therefore, the formation of the altered component B 'in the product can be further prevented. The combined distillation column 10 preferably has about 30 to 100 theoretical plates as a whole, and the fourth section 14 and the sixth section 16 each preferably have about 5 to 30 plates.

In this embodiment, each of the enrichment sections AR
1, AR3, AR5 and each collection unit AR2, AR4, AR
6 is formed by a packing consisting of one section, but depending on the relative volatility between the components to be distilled, in order to secure the number of theoretical plates required for distillation,
It can also be formed by a multi-node filling depending on the properties of the filling used. In addition, a distributor can be provided between nodes. further,
It is not always necessary to arrange the feed nozzle 41 and the side cut nozzle 42 at the same height.

In the distillation apparatus having the above structure, organic compounds such as hydrocarbons, alcohols, ketones, esters, fatty acids, phenols, nitrogen compounds, and fragrances can be separated by distillation. And, as hydrocarbons, benzene, toluene, xylene, biphenyl, naphthalene, etc. are separated, as alcohols, methanol, ethanol, butanol, heptanol, octanol, etc. are separated, and as ketones, acetone, methyl ethyl ketone, Separation of methyl isobutyl ketone, etc., as esters, ethyl acetate, butyl acetate, methyl acetate, butyl acrylate, etc., as fatty acids, acetic acid, butyric acid, fatty acids, higher alcohols, etc., As phenols,
Phenol, cresol, xylenol, etc.
As nitrogen oxides, dimethylamine, triethylamine, aniline, pyridine, picoline, quinoline, etc. are separated, and as fragrance, methyl anthranilate, methyl benzoate, isoeugenol, ethyl caproate, eugenol, graniol, etc. Can be.

In particular, in the present embodiment, a small amount of many kinds of fragrances, fats and oils, fatty acids, etc., having a carbon number of C8 to
It is suitable when a high boiling point material of about C22 is separated under reduced pressure.

The present invention is not limited to the above 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.

[0062]

As described above in detail, according to the present invention, in the distillation apparatus, the column main body and the inside of the column main body are partitioned, and the first chamber and the second chamber are formed adjacent to each other. An intermediate partition and a stock solution containing a low-boiling component, a medium-boiling component and a high-boiling component were supplied via a feed nozzle, and a concentrating section formed above the feed nozzle and formed below the feed nozzle. A first distillation unit having a recovery unit, a concentrating unit connected to the upper end of the first distillation unit, formed above the upper end, and formed below the upper end, and via a partition A second distillation section provided with a recovery section adjacent to the enrichment section of the first distillation section, and connected to a lower end of the first distillation section, formed above the lower end, and provided with a middle partition. Enrichment section adjacent to the recovery section of the first distillation section via A third distillation section having a recovery section formed below the lower end; a condenser disposed at the top of the column, for condensing vapor rich in low boiling components discharged at the top of the column; And a side-cut nozzle that discharges liquid rich in medium-boiling components discharged at the tower side as a product, and a liquid that is disposed at the bottom of the tower and heats liquid rich in high-boiling components discharged at the bottom of the tower And a cooler connected to the side cut nozzle and cooling the product.

In this case, the liquid rich in the middle-boiling component is concentrated in the recovery section of the second distillation section and discharged as a product on the column side, whereas the liquid rich in the high-boiling component is removed from the second distillation section. It is concentrated in the recovery section of the first distillation section and the concentration section of the third distillation section, further concentrated in the recovery section of the third distillation section, and discharged at the bottom of the column. The altered components formed by decomposing the middle boiling components are collected near the bottom of the column and then discharged at the bottom of the column.

Therefore, since the high-boiling components, altered components, etc. and the middle-boiling components do not come into contact with each other in a liquid state, the product is recovered while the high-boiling components, altered components, etc. are contained as impurities. Nothing. As a result, it is possible to prevent the product from being affected by hue, fragrance, and the like.

Also, a control valve, a product condenser, a receiver,
Since an auxiliary device such as a heater is not required, the size of the distillation apparatus can be reduced, and the cost of the distillation apparatus can be reduced. In addition, equipment for managing the operation of the distillation apparatus and performing maintenance can be simplified. Further, since the product can be recovered in a liquid state, control of the flow rate of the product can be extremely simplified, and the cost of the distillation apparatus can be reduced.

Further, since the product is collected on the side of the tower, it is not exposed to a high temperature by the evaporator disposed at the bottom of the tower. Moreover, there is no need to further heat the product with a heater. Therefore, the formation of altered components in the product can be prevented, and the quality of the product can be improved.

Since the product recovered on the side of the tower is immediately cooled by the cooler, the medium boiling component is not decomposed by the heat of the product itself. Therefore, the formation of altered components in the product can be further prevented.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a distillation apparatus according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a conventional distillation apparatus.

FIG. 3 is a conceptual diagram of a conventional distillation apparatus that recovers a product in a vapor state.

FIG. 4 is a conceptual diagram of a conventional distillation apparatus for removing impurities contained in a product.

FIG. 5 is a conceptual diagram of a combined distillation column according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Combined distillation tower 14A-16A 1st chamber 14B-16B 2nd chamber 22-24 Partition 25-27 1st-3rd distillation part 41 Feed nozzle 42 Side cut nozzle 81 Condenser 82 Evaporator 92 Cooler AR1, AR3, AR5 Concentration unit AR2, AR4, AR6 Collection unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D076 AA13 AA22 AA23 AA24 BB04 BB27 CA11 CA13 CB02 CB06 CC24 CD22 DA02 DA25 FA31 FA34 FA37 JA02 JA03 JA05

Claims (1)

[Claims] 1. A (a) tower main body, (b) a partition for partitioning the inside of the tower main body and forming a first chamber and a second chamber adjacent to each other, and (c) a low boiling point component and a medium boiling point A stock solution containing the components and the high-boiling components is supplied through a feed nozzle,
A first distillation section including a concentrating section formed above the feed nozzle and a collecting section formed below the feed nozzle; and (d) connected to an upper end of the first distillation section, An enrichment section formed above an upper end, and a first section formed below an upper end and through a partition;
(E) connected to the lower end of the first distillation unit, formed above the lower end of the first distillation unit, and provided with a middle partition. A concentration section adjacent to the recovery section of the first distillation section, and a third distillation section including a recovery section formed below the lower end;
(F) a condenser disposed at the top of the column to condense vapor rich in low-boiling components discharged at the top, and (g) a medium-boiling component disposed at the column side and discharged at the column side. (H) a side-cut nozzle for discharging the rich liquid as a product, (h) an evaporator disposed at the bottom of the tower to heat the liquid rich in the high-boiling component discharged at the bottom of the tower and generate steam. A) a cooler connected to the side cut nozzle for cooling the product.