JP3435377B2 - Distillation equipment - Google Patents

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.

For example, in a stock solution containing three components A to C, when the boiling point of the component A is lower than that of the component B and the boiling point of the component B is lower than the component C, the stock solution is distilled by the following distillation apparatus, and each component is distilled. A to C are separated.

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

In the figure, 101 is a distillation column, and the distillation column 101 includes a charging pot portion 102 and the charging pot portion 102.
A reboiler 1 formed by projecting from the charging pot portion 102 and a concentrating portion 103 formed by a filling material element (not shown).
04.

Then, for example, when diluting the stock solution M containing the three components A to C, the stock solution M is fed to the distillation column 101.
When the liquid in the charging pot portion 102 is heated by the reboiler 104, the vapor moves upward in the concentrating portion 103, whereby fractionation is performed, and vapor rich in component A is generated via the vapor outlet 105. The liquid is discharged and sent to the condenser 106, and is condensed in the condenser 106 to become a liquid rich in component A, and the liquid rich in component A is discharged as a distillate (first fraction).

Next, when the liquid is further heated by the reboiler 104, the vapor rich in the components A and B is discharged via the vapor outlet 105 and sent to the condenser 106, where it is condensed. The liquid is rich in components A and B, and the liquid rich in components A and B is discharged as a distillate (second fraction).

Subsequently, when the liquid is further heated by the reboiler 104, the vapor rich in the component B is discharged through the vapor outlet 105 and sent to the condenser 106, where it is condensed in the condenser 106 and the component B is condensed. The liquid rich in component B is discharged as a distillate (third fraction).

When the liquid is further heated by the reboiler 104, the components B and C are passed through the vapor outlet 105.
Rich vapor is discharged to the condenser 106 and condensed in the condenser 106 to become a liquid rich in components B and C. The liquid rich in components B and C is a distillate (first Four
It is discharged as a distillate). At this time, the charging pot 102
The liquid rich in component C remains inside, and the liquid rich in component C is discharged as a residue (sa).

The first distillation apparatus (batch type distillation apparatus)
In the above, since the stock solution M can be distilled in one distillation column 101, the first distillation apparatus can be downsized and the cost can be reduced. Also,
Even when the stock solution M contains a large number of components, the distillation process is not complicated, and the distillation process is not restricted by the types of the stock solution M and the components A to C.

FIG. 3 is a conceptual diagram of a second conventional distillation apparatus.

In the figure, 201 is a first distillation column, 20
2 is a second distillation column, 203 and 205 are evaporators, 204,
206 is a condenser. The first distillation column 201 is composed of a first section 211 to a fifth section 215 from the top to the bottom of the second section 212.
The fourth section 214 is formed by a packing element (not shown), and constitutes a concentrating section and a collecting section, respectively. In addition, the second distillation column 202 includes a first section 216 to a fifth section 22 from the top to the bottom.
0, of which the second section 217 and the fourth section
Section 219 is formed by the packing element and constitutes a concentrating section and a collecting section, respectively.

Then, for example, the stock solution M containing the three components A to C is the third section 21 of the first distillation column 201.
3, the component-A-rich vapor is discharged from the top of the first distillation column 201 and sent to the condenser 204, where it is condensed into the component-A-rich liquid. The liquid rich in the component A is discharged as a distillate. Further, a part of the distillate is refluxed as a reflux liquid into the first distillation column 201, and the rest of the distillate is discharged to the outside.

On the other hand, the liquid rich in components B and C is discharged from the bottom of the first distillation column 201 as a bottom liquid. Then, a part of the bottom liquid is sent to the evaporator 203 and heated in the evaporator 203 to become vapor rich in components B and C, and the vapor rich in components B and C is the first vapor. Distillation tower 201
And the remainder of the bottoms is circulated in the second distillation column 20.
2 to the third section 218.

When the bottoms liquid is supplied to the third section 218, the vapor enriched in the component B is discharged from the top of the second distillation column 202 and sent to the condenser 206, and the condenser 2
At 06, it is condensed to a liquid rich in component B, which is discharged as a distillate. Then, a part of the distillate is used as a reflux liquid in the second distillation column 202.
While being refluxed in, the rest of the distillate is discharged to the outside.

On the other hand, the liquid rich in component C is discharged from the bottom of the second distillation column 202 as bottoms. Then, a part of the bottom liquid is sent to the evaporator 205, and the evaporator 20
At 5 the vapor is enriched in component C, the vapor enriched in component C is circulated in the second distillation column 202 and the remainder of the bottoms is discharged to the outside.

Since the second distillation apparatus (continuous distillation apparatus) is provided with the recovery unit, the energy consumption can be reduced, the product recovery rate can be increased, and each component can be recovered. The separation performance of A to C and the purity of the product can be increased. Then, since the stock solution M can be continuously supplied to the third section 213 and distilled, the operation rate and the processing capacity of the second distillation apparatus can be increased.

FIG. 4 is a conceptual diagram of a third conventional distillation apparatus. In addition, about the thing which has the same structure as the conventional 2nd distillation apparatus, the description is abbreviate | omitted by giving the same code | symbol.

In the figure, 301 to 303 are stock solution tanks, and L1 to L6 are lines.

In the first distillation process, when a stock solution M1 containing, for example, five components A to E is supplied from the stock solution tank 301 to the third section 213 in the first step, a liquid rich in the component A is supplied to the line. The liquid rich in the components B to E is discharged to the line L2, the liquid rich in the component B to the line L3, and the liquid rich in the components C to E is discharged to the line L4. At this time, the liquid rich in components C to E is collected in the stock solution tank 303 as the intermediate stock solution M2.

Subsequently, in the second step, when the intermediate stock solution M2 is supplied from the stock solution tank 303 to the third section 213, the liquid rich in the component C is fed into the line L1 and the liquid rich in the components D and E is fed into the line L1. The liquid rich in component D is discharged to line L3 in L2, and the liquid rich in component E is discharged to line L4.

In the second distillation process, when a stock solution M1 containing, for example, five components A to E is supplied from the stock solution tank 301 to the third section 213 in the first step, a liquid rich in the components A to C is obtained. Is on line L1 and the component D,
The liquid rich in E is discharged to the line L2, the liquid rich in component D is discharged to the line L3, and the liquid rich in component E is discharged to the line L4. At this time, the liquid rich in components A to C is collected in the stock solution tank 302 as the intermediate stock solution M3.

Subsequently, in the second step, when the intermediate stock solution M3 is supplied from the stock solution tank 302 to the third section 213, the liquid rich in the component A is in the line L1 and the liquid rich in the components B and C is in the line L1. The liquid rich in component B is discharged to line L3 in L2, and the liquid rich in component C is discharged to line L4.

Since the third distillation apparatus (multipurpose continuous distillation apparatus) is provided with the recovery section, it is possible to reduce energy consumption and increase the product recovery rate. The separation performance of the components A to E and the purity of the product can be increased.

Then, since the stock solution M1 can be continuously supplied to the third section 213 to be distilled,
It is possible to increase the operation rate and processing capacity of the distillation apparatus.

Even when the stock solution M1 contains a large number of components, the distillation process does not become complicated, and the stock solution M1 is used.
1. The distillation process is not restricted by the types of the components A to E, etc.

[0027]

However, in the above-mentioned first to third conventional distillation apparatuses, the first distillation apparatus does not have a recovery section, so that the energy consumption increases and the recovery of the product. Not only will the rate be lowered, but the separation performance of each of the components A to C and the purity of the product will also be low.
Moreover, since the stock solution M cannot be continuously supplied to the concentration section 103 for distillation, and only the part supplied to the charging pot section 102 is distilled, the operation of the first distillation apparatus is started. The rate and the processing capacity are low.

In the case of the second distillation apparatus, the first and second
Since the distillation columns 201 and 202 are required, the second distillation apparatus becomes large. Then, the evaporators 203 and 20
5 and the condensers 204 and 206, pumps (not shown), instrumentation parts, etc. are required for each of two series, which not only increases the area occupied by the distillation apparatus but also increases the cost.

If the stock solution M contains a large number of components, the distillation process becomes complicated, and the distillation process may be restricted by the types of the stock solution M, the components, etc., and distillation may not be possible. Furthermore, since the structure of the second distillation apparatus is complicated, the cost of the second distillation apparatus becomes high.

Further, in the case of the third distillation apparatus, the first and second distillation columns 201 and 202 are required as in the case of the second distillation apparatus, so that the third distillation apparatus becomes large. Then, the evaporators 203 and 205 and the condensers 204 and 20
6. Not only two unillustrated pumps, instrumentation parts, etc. are required for each series, but undiluted solution tanks 301 to 303 are required. Therefore, not only the area occupied by the third distillation apparatus becomes large, but also the cost is increased. It gets expensive.

The present invention solves the problems of the above-mentioned first to third distillation apparatuses, simplifies the distillation process when the stock solution contains a large number of components, and removes the stock solution, the components, etc. It is possible to prevent the distillation process from being restricted by the type, and when the stock solution does not contain a large number of components, the stock solution can be continuously distilled, thereby increasing the operation rate and the processing capacity, and reducing the consumption. Energy can be reduced, product recovery rate can be increased, separation performance of each component and product purity can be increased, and size can be reduced, and cost can be reduced. It is an object of the present invention to provide a distillation apparatus capable of

[0032]

To this end, in the distillation apparatus of the present invention, a charging pot for storing a liquid, a heating unit for heating the liquid to generate vapor, and a distillate discharge unit at the top of the column. A reflux liquid receiving part, a bottom liquid discharging part and a steam receiving part at the bottom of the tower, and a feed nozzle and a feed / discharge nozzle at the tower side, and the inside of the tower main body is partitioned by a partition to provide a first Communication means for allowing one chamber to selectively communicate between a combined distillation section in which a second chamber is formed on the supply / discharge nozzle side and a line connected to the feed nozzle and a line connected to the supply / discharge nozzle Have and.

In another distillation apparatus of the present invention, the stock solution is further supplied to the charging pot section.

In still another distillation apparatus of the present invention, the stock solution is further supplied to the combined distillation section via the feed nozzle.

In still another distillation apparatus of the present invention, the stock solution is further supplied to the combined distillation section through the feed nozzle and the supply / discharge nozzle.

In still another distillation apparatus of the present invention, the stock solution is further supplied to the charging pot section in the first stage,
In the second stage, it is supplied to the combined distillation section through the feed nozzle.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a conceptual diagram of a distillation apparatus according to the embodiment of the present invention, and FIG. 5 is a conceptual diagram of a combined distillation column according to the embodiment of the present invention. In this case, as the undiluted solution M, a mixture containing the components A to C or the components A to E in descending order of boiling point is used.

In the figure, 10 is a combined distillation column as a combined distillation section, 31 is a charging pot / reboiler unit, 3
2 is a gas cooler and 33 is a vacuum generator.

The combined distillation column 10 comprises a first section 11, a second section 12, a third section 13 and a fourth section.
It comprises a section 14, a fifth section 15, a sixth section 16, a seventh section 17, an eighth section 18 and a ninth section 19.

The column body of the combined distillation column 10 is constructed such that the fourth chamber 14, the fifth chamber 15, and the sixth chamber 16 are divided into the first chambers 14A to 16A and the second chamber by the flat partition 22. 14B to 16B, which are divided into first chambers 14A to 16A and second chambers 14B to 1B.
6B are adjacent to each other. In the present embodiment, the partition 22 is arranged in the center of the tower body,
It can also be eccentrically arranged. Also, the first chamber 1
4A to 16A, the first distillation section 25 causes the first section 11, the second section 12, the third section 1
3 and the second chamber 14B, 15B by the second distillation section 26
However, the second chamber 15B, 16B, the seventh section 17,
A third distillation section 27 is formed by the eighth section 18 and the ninth section 19, respectively.

The partition 22 is formed of a heat insulating material, or the interior of the partition 22 is evacuated,
The partition 22 may have a heat insulating structure. In this case, between the first chamber 14A and the second chamber 14B, the first chamber 15A
And the second chamber 15B, and the first chamber 16A and the second chamber 16
Since the heat transfer with B can be reduced respectively, the efficiency of distillation can be improved.

A feed nozzle 41 as a stock solution receiving portion facing the first chamber 15A and a feed / discharge nozzle 42 facing the second chamber 15B are formed on the tower side of the combined distillation column 10 respectively. . In the present embodiment, the feed nozzle 41 is formed so as to face the first chamber 15A and the supply / discharge nozzle 42 is formed so as to face the second chamber 15B, but the feed nozzle 41 may be formed at any position on the first chamber 14A to 16A side. , Supply / discharge nozzle 4
2 can also be formed at an arbitrary location on the second chamber 14B to 16B side.

At the top of the combined distillation column 10,
A condenser 81 is provided in the first section 11, and a distillate outlet 43 serving as a distillate discharge portion and a reflux liquid inlet 44 serving as a reflux liquid receiving portion are provided so as to face the first section 11. Formed respectively. In the present embodiment, the condenser 81 is arranged in the first section 11, but the condenser may be arranged outside the tower body. In that case, a steam outlet is formed in place of the distillate outlet 43, and the steam is discharged from the top of the column and condensed by the condenser to become the distillate.

Then, at the bottom of the combined distillation column 10, facing the ninth section 19 and connected to the charging pot / reboiler unit 31, a bottoms outlet 45 as a bottoms discharging part is provided. , And a steam inlet 46 as a steam receiving portion are respectively formed.

In the first distillation section 25, an area AR1 is formed above the feed nozzle 41 by the first chamber 14A, and an area AR2 is formed below the feed nozzle 41 by the first chamber 16A. To be done. In the second distillation section 26, the area AR is formed by the second section 12 above the upper end of the first distillation section 25.
3 is located below the upper end of the first distillation section 25 and adjacent to the area AR1 by the second chamber 14B.
4 are formed respectively. Further, the third distillation section 2
In the area 7 above the lower end of the first distillation section 25, adjacent to the area AR2, the area AR5 is provided below the lower end of the first distillation section 25 by the second chamber 16B. Areas AR6 are respectively formed by the sections 18. In this way, the upper end of the first distillation section 25 becomes the second
The lower end of the first distillation section 25 is connected to substantially the center of the distillation section 26 in the height direction, and the lower end of the first distillation section 25 is connected to the substantially center of the third distillation section 27 in the height direction. In the present embodiment, two regions AR1 and AR2 are provided in the first distillation section 25,
In the second distillation section 26, two areas AR3 and AR4 are
Although two areas AR5 and AR6 are formed in the distillation section 27 of the above, the first to third distillation sections 25 to 27 are formed.
It is also possible to form an arbitrary number of regions.

A collector 51 and a tubular type distributor 52 are arranged in the first section 11, and the liquid collected by the collector 51 is discharged as a distillate through a distillate outlet 43. The reflux liquid supplied to the distributor 52 via the reflux liquid inlet 44 is distributed to the second section 12 by the distributor 52. Further, a collector 53 and tubular distributors 54, 55 are arranged in the third section 13, and the liquid collected by the collector 53 is distributed by the distributors 54, 55.
According to the predetermined distribution ratio, the first chamber 14A and the second chamber 14
B and B.

In the first chamber 15A, a collector 61 is provided directly above the feed nozzle 41, and a tubular distributor 63 is provided immediately below the feed nozzle 41, and the liquid collected by the collector 61 flows through the feed nozzle 41. The undiluted solution M supplied via the distributor 63 is supplied to the first chamber 16A by the distributor 63.

On the other hand, in the second chamber 15B, a collector 62 is provided directly above the supply / discharge nozzle 42, and a tubular distributor 64 is provided directly below it, and the liquid collected by the collector 62 is a side cut liquid. It is discharged through the supply / discharge nozzle 42 and is supplied to the second chamber 16B by the distributor 64.

Further, when the stock solution M is supplied to the second chamber 15B via the supply / discharge nozzle 42, the liquid collected by the collector 62 is, together with the stock solution M supplied via the supply / discharge nozzle 42, It is supplied to the second chamber 16B by the distributor 64.

Further, the collector 65 and the tubular type distributor 66 are arranged in the seventh section 17, and the liquid moving downward from the sixth section 16 is collected by the collector 65 and then the distributor 66 described above. It is supplied to the eighth section 18.

Incidentally, the cooling water inlet 4 for facing the first section 11 and supplying the cooling water to the condenser 81.
7, a cooling water outlet 48 for discharging the cooling water from the condenser 81, and a gas outlet 49 for discharging the gas in the first section 11 are formed.

Further, the charging pot / reboiler unit 3
1 is equipped with a charging pot portion 34 for storing a liquid, and a reboiler 35 as a heating portion for projecting upward from the charging pot portion 34 and heating the liquid to generate steam. At the upper end of the charging pot portion 34, a tapping liquid inlet 36 for receiving the tapping liquid discharged via the tapping liquid outlet 45 and a steam outlet 37 for discharging the steam generated in the charging pot portion 34 are provided. A circulating liquid outlet 38 for discharging the circulating liquid in the charging pot portion 34 is formed at the lower end of the recycle boiler, and a circulating liquid inlet 39 for receiving the circulating liquid is formed at the upper end of the reboiler 35. The reboiler 35 is provided with a steam inlet 71 for receiving the heat source steam S as a heating medium generated for heating the circulating liquid in a heating source (not shown) and a drain outlet 72 for discharging the drain.

In the present embodiment, the combined distillation column 1
0 and the charging pot / reboiler unit 31 are formed separately, but the combined distillation column 10 and the charging pot / reboiler unit 31 may be integrally formed. Further, in the charging pot / reboiler unit 31, the charging pot part 3
4 and the reboiler 35 are integrally formed, but the charging pot portion 34 and the reboiler 35 may be separately formed. In that case, the combined distillation column 10 and the charging pot portion 34 can be integrally formed.

L11 is a line connecting a stock solution tank (not shown) and the feed nozzle 41, and a flow rate sensor f for detecting the flow rate of the stock solution M is connected to the line L11.
1, a flow rate control valve V1 and a switching valve K1 are provided, and the flow rate control valve V1 controls the flow rate of the stock solution M based on the sensor output of the flow rate sensor f1. L12 is a line connecting the distillate outlet 43 and a distillate supply destination (not shown),
A reflux pump P serving as a first pump is connected to the line L12.
1. A flow rate sensor f2 for detecting the flow rate of the distillate and a flow rate control valve V2 are provided, and the flow rate control valve V2 includes the flow rate sensor f2 and a level sensor h1 provided in the collector 51.
The flow rate of the distillate is controlled based on the sensor output of.

L13 is a line connecting the supply / discharge nozzle 42 and a side cut liquid supply destination (not shown),
A switching valve K2, a side cut liquid pump P2 as a second pump, a flow rate sensor f3 for detecting the flow rate of the side cut liquid, and a flow rate control valve V3 are arranged in the line L13.
The flow rate control valve V3 includes a flow rate sensor f3 and a collector 6
The flow rate of the side cut liquid is controlled based on the sensor output of the level sensor h2 arranged in No. 2. L14 is a line that branches between the reflux pump P1 and the flow rate sensor f2 in the line L12 and is connected to the reflux liquid inlet 44,
A flow rate sensor f4 for detecting the flow rate of the reflux liquid and a flow rate control valve V4 are arranged in the line L14, and the flow rate control valve V4 is provided.
Controls the flow rate of the reflux liquid based on the sensor output of the flow rate sensor f4.

L15 is a line connecting the bottoms outlet 45 and the bottoms inlet 36, L16 is a line connecting the steam outlet 37 and the steam inlet 46, and L17 is a circulating liquid outlet 3.
8 is a line connecting the circulating liquid inlet 39, and a circulating pump P3 as a third pump and a flow rate sensor f5 are arranged in the line L17. L18 is line L17
The line L18 is a line that branches between the circulation pump P3 and the flow rate sensor f5 and is connected to a not-shown bottoms liquid supply destination. The line L18 includes a flow rate sensor f6 for detecting the flow rate of bottoms liquid and a flow rate control valve. V6 is provided, and the flow rate control valve V6 controls the flow rate of the bottom liquid based on the sensor output of the flow rate sensor f6.

Further, L21 branches off between the flow control valve V1 and the switching valve K1 in the line L11, and the line L1
3 is a line connected between the supply / discharge nozzle 42 and the switching valve K2 in FIG. 3, and the switching valve K3 is arranged in the line L21. The line L21 and the switching valve K3 form a communication unit that selectively connects the lines L11 and L13. L22 is a line for connecting the gas outlet 49 and a gas exhaust unit (not shown) to exhaust gas, and a gas cooler 32 and a vacuum generator 33 are arranged in the line L22. L23 is a line that bypasses the vacuum generator 33, and an opening / closing valve V7 is connected to the line L23.
The opening / closing valve V7 is opened / closed based on the sensor output of the pressure sensor g1 arranged to detect the pressure in the first section 11.

A line L24 is branched between the flow control valve V1 and the switching valve K1 in the line L11 and further upstream of the branch point where the line L21 branches, and is connected to the charging pot portion 34. The opening / closing valve V8 is arranged in the line L24, and the opening / closing valve V8 is opened / closed based on the time counted by the timer τ. L25 is a line connecting the heating source and the steam inlet 71, and a flow rate sensor f9 and a flow rate control valve V9 are arranged in the line L25. The flow rate control valve V9 is based on the sensor output of the flow rate sensor f9. The flow rate of the heat source steam S is controlled.

Then, t1 is a temperature sensor for detecting the temperature in the first section 11, t2 is a temperature sensor for detecting the temperature of the liquid in the collector 53, and t3 is a temperature sensor for detecting the temperature of the liquid in the collector 61. t4 is a collector 62
, A temperature sensor for detecting the temperature of the liquid inside, t5 is a temperature sensor for detecting the temperature of the liquid inside the collector 65, and t6 is the ninth temperature sensor.
A temperature sensor for detecting the temperature in the section 19, t7 is a temperature sensor for detecting the temperature of the circulating liquid discharged from the charging pot portion 34, and h3 is a level sensor for the liquid in the charging pot portion 34.

A control device (not shown) is provided to control the entire distillation apparatus.

In the distillation apparatus having the above structure, the operator can switch the operation mode manually or automatically. When manually switching the operation mode, the operator must select the switching valve K1.
.About.K3 is switched, the opening / closing valve V8 is opened / closed, and the reflux pump P1, the side cut liquid pump P2, and the circulation pump P3 are manually driven. Further, when the operation mode is automatically switched, when the operator operates an operation unit (not shown), the mode switching processing means of the control device causes the switching valves K1 to K3 to be switched, the opening / closing valve V8 to be opened / closed, and the reflux pump P1 and the side pump. The cut liquid pump P2 and the circulation pump P3 are automatically driven.

Next, the first operation mode will be described.

FIG. 6 is a diagram showing a distillation process in the first operation mode according to the embodiment of the present invention.

In the first mode of operation, the distillation apparatus is used as a batch distillation apparatus. Therefore, the switching valves K1 to K3 are all closed, and the feed nozzle 4
Neither 1 nor the supply / discharge nozzle 42 is used. Then, the vapor of the stock solution M is supplied to the combined distillation column 10 through the steam inlet 46, the distillate is discharged through the distillate outlet 43, and the reflux liquid is combined distillation through the reflux liquid inlet 44. Tower 1
Refluxed to zero.

For example, when diluting the stock solution M containing the three components A to C, the stock solution M is supplied to the charging pot portion 34 through lines L11 and L24, and the liquid in the charging pot portion 34 is used as a circulating liquid. It is circulated through the circulating liquid outlet 38 and the line L17, and is heated by the heat source steam S in the reboiler 35. When the steam generated at this time is supplied to the combined distillation column 10 via the steam outlet 37 and the line L16,
Fractional distillation is performed by moving the vapor upward in the combined distillation column 10 and condensed in the condenser 81 by cooling water to become a liquid rich in component A.
The rich liquid is discharged to the line L12 as a distillate through the distillate outlet 43.

Next, when the liquid is further heated in the reboiler 35, the vapor is condensed in the condenser 81 to become a liquid rich in component B, and the liquid rich in component B is distillate as distillate. It is discharged to the line L12 via the outlet 43. At this time, the liquid and the residue rich in the component C remain in the charging pot portion 34, and the liquid and the residue rich in the component C are discharged as a bottom liquid through the circulating liquid outlet 38 to the line L17,
It is discharged to L18.

Further, for example, in the case of distilling the stock solution M containing the five components A to E, in the first distillation process, the stock solution M is supplied to the charging pot section 34 through the lines L11 and L24 to charge the stock solution. The liquid in the pot portion 34 is circulated as a circulating liquid through the circulating liquid outlet 38 and the line L17, and is heated in the reboiler 35. When the vapor generated at this time is supplied to the combined distillation column 10 through the vapor outlet 37, the line L16 and the vapor inlet 46, the vapor is condensed in the condenser 81 to become a liquid rich in component A, The liquid rich in component A is the distillate outlet 4
3 is discharged to the line L12.

Next, when the liquid is further heated in the reboiler 35, the liquid enriched in the component B, the liquid enriched in the component C, and the liquid enriched in the component D are sequentially discharged as distillate from the distillate outlet 43. It is discharged to the line L12 via. At this time, the liquid and the residue rich in the component E remain in the charging pot portion 34, and the liquid and the residue rich in the component E are discharged to the lines L17 and L18 as the bottom liquid via the circulating liquid outlet 38.

Then, for example, in the case of distilling the stock solution M containing the five components A to E, in the second distillation process, the stock solution M is supplied to the charging pot section 34 through the lines L11 and L24 to charge the stock solution. The liquid in the pot portion 34 is circulated as a circulating liquid through the circulating liquid outlet 38 and the line L17,
Heat in the reboiler 35. When the steam generated at this time is supplied to the combined distillation column 10 through the steam outlet 37, the line L16 and the steam inlet 46, the steam moves upward in the combined distillation column 10 to perform fractional distillation. The liquid rich in the components A and B is condensed in the condenser 81, and the liquid rich in the components A and B is discharged to the line L12 as the first intermediate stock solution through the distillate outlet 43. .

Next, when the liquid is further heated in the reboiler 35, the vapor is condensed in the condenser 81 to become a liquid rich in the components C and D, and the liquid rich in the components C and D becomes the second liquid. The intermediate stock solution is discharged to the line L12 via the distillate outlet 43. At this time, the charging pot portion 34
The liquid and the residue rich in the component E remain inside, and the liquid and the residue rich in the component E are discharged to the lines L17 and L18 as a bottom product via the circulating liquid outlet 38.

Subsequently, the first intermediate stock solution is added to the line L1.
1, L24 is supplied to the charging pot portion 34, the liquid in the charging pot portion 34 is circulated as a circulating liquid through the circulating liquid outlet 38 and the line L17, and is heated in the reboiler 35. When the vapor generated at this time is supplied to the combined distillation column 10 through the vapor outlet 37, the line L16 and the vapor inlet 46, the vapor is condensed in the condenser 81 to become a liquid rich in component A, The liquid rich in component A is discharged to the line L12 as a distillate via the distillate outlet 43.

Next, when the liquid is further heated in the reboiler 35, the vapor is condensed in the condenser 81 to become a liquid rich in component B, and the liquid rich in component B is distillate as distillate. It is discharged to the line L12 via the outlet 43.

The second intermediate stock solution is added to the lines L11 and L.
It is supplied to the charging hook portion 34 via 24, and the charging hook portion 34
Circulating liquid outlet 38 and line L1 using the liquid inside as a circulating liquid
It is circulated through 7 and heated in the reboiler 35.
The steam generated at this time is passed through the steam outlet 37 and the line L16.
And supplied to the combined distillation column 10 through the vapor inlet 46, the vapor is condensed in the condenser 81 to become a liquid rich in component C, and the liquid rich in component C is distilled as a distillate. It is discharged to the line L12 via the liquid outlet 43.

Next, when the liquid is further heated in the reboiler 35, the vapor is condensed in the condenser 81 to become a liquid rich in component D, and the liquid rich in component D is distillate as distillate. It is discharged to the line L12 via the outlet 43.

As described above, in the first operation mode, the first to third distillation sections 25 (FIG. 5) to 27 of the combined distillation column 10 are used as one distillation section, and the conventional distillation column 101 is used. Since the stock solution M can be distilled by performing the same function as in (FIG. 2), the distillation process can be simplified even when the stock solution M contains a large number of components, and the stock solution M, the components A to The distillation process is not restricted by the type such as E.

Next, the second operation mode will be described.

FIG. 7 is a diagram showing a distillation process in the second operation mode according to the embodiment of the present invention.

In the second operating mode, the distillation apparatus is used as a continuous distillation apparatus. Therefore, the switching valves K1 and K2 are opened, the switching valve K3 is closed, and both the feed nozzle 41 and the supply / discharge nozzle 42 are used. Then, the undiluted solution M is supplied to the combined distillation column 10 through the feed nozzle 41, the distillate is discharged through the distillate outlet 43, and a part of the distillate serves as the reflux liquid through the reflux liquid inlet 44. To the combined distillation column 10 through which the side cut liquid is discharged through the feed / discharge nozzle 42, the bottom liquid is discharged through the bottom liquid outlet 45, and the vapor of the bottom liquid is discharged through the vapor inlet 46. It is supplied to the combined distillation column 10 through.

Further, the areas AR1 (FIG. 5), AR3,
The enrichment part is formed by AR5, and the areas AR2, AR4, AR6
The recovery part is formed by.

Then, for example, when distilling the stock solution M containing the three components A to C, in the area AR2, the stock solution M supplied through the line L11 and the feed nozzle 41 moves downward and moves upward. In ingredients A, B
The liquid rich in components B and C is generated as it goes downward, and the 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 liquid rich in the components B and C is heated in the third distillation section 27 to become vapor rich in the components B and C, and the vapor rich in the components B and C is While being moved upward in the area AR2, it contacts the undiluted solution M to generate a vapor rich in components A and B.

Subsequently, the vapor rich in the components A and B moves upward in the area AR1 and is supplied from the upper end of the first distillation section 25 to the second distillation section 26. Further, the vapor rich in the components A and B is 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 region AR1 and brought into contact with the vapor rich in the components A and B which is moved upward in the region AR1.

In this way, the vapor rich in the 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 area AR6, the liquids rich in the components B and C move downward, and vapors rich in the component B are generated in the upper part and liquids rich in the component C are generated in the lower part. Therefore, the liquid rich in the component C is discharged to the line L15 as the bottom liquid via the bottom liquid outlet 45.

The bottom liquid is sent to the charging pot portion 34 through a line L15 and a bottom liquid inlet 36, and further to a bottom liquid supply destination (not shown) through a circulating liquid outlet 38 and lines L17 and L18. Supplied. Further, a part of the bottom liquid is circulated through the circulating liquid outlet 38 and the line L17, and is heated by the heat source steam S in the reboiler 35 to become a vapor rich in the component C and rich in the component C. The steam is supplied to the charging pot portion 34. Then, the steam rich in the component C is supplied to the ninth section 19 through the steam outlet 37, the line L16 and the steam inlet 46, and is moved upward in the ninth section 19 and the area AR6. , And contact with a liquid rich in components B and C to generate a vapor rich in component B from the liquid rich in components B and C.

Subsequently, a part of the vapor rich in the component B is
It moves upward in the area AR5 and comes into contact with the component B-rich liquid from the second distillation section 26 at the upper end of the third distillation section 27 to become a component B-rich liquid. In this way
The liquid rich in component B obtained at the upper end of the third distillation section 27 is discharged to the line L13 as the side cut liquid through the supply / discharge nozzle 42. In this case, the supply / discharge nozzle 42 functions as a side cut nozzle.

On the other hand, in the area AR4, the liquids rich in the components A and B move downward, and vapors rich in the component A are generated in the upper part and liquids rich in the component B are generated in the lower part. In this way, the second
The liquid rich in component B obtained at the lower end of the distillation section 26 is discharged as a side cut liquid to the line L13 via the supply / discharge nozzle 42.

Then, the vapor rich in the component A moves upward in the area AR3, is supplied to the first section 11, and is condensed by the cooling water in the condenser 81 in the first section 11 to be the component. Becomes a liquid rich in A,
The liquid rich in the component A is discharged as a distillate to the line L12 via the distillate outlet 43.

In this way, the vapor rich in components A and B is separated into the vapor rich in component A and the liquid rich in component B by the second distillation section 26, and rich in component A. The vapor becomes a liquid rich in the component A, and the liquid rich in the component A is discharged as a distillate through the distillate outlet 43 to the line L1.
The liquid discharged to No. 2 and rich in component B is discharged to the line L13 through the supply / discharge nozzle 42 as the side cut liquid. Further, the liquid rich in components B and C is separated into the liquid rich in component B and the liquid rich in component C by the third distillation section 27, and the liquid rich in component B is a side cut liquid. The liquid that is discharged to the line L13 through the supply / discharge nozzle 42 and is rich in the component C is used as the bottom liquid and the bottom liquid outlet 4
It is discharged to the line L15 via No. 5.

Then, in order to increase the efficiency of distillation of the component A, a part of the distillate is used as a reflux liquid in the line L14.
And, it is brought into contact with the vapor rich in the components A and B which is refluxed to the region AR3 through the reflux liquid inlet 44 and is moved upward in the region AR3.

Each of the regions AR1 to AR6 is formed by a packing consisting of one node. However, depending on the relative volatility of each component to be distilled, the number of theoretical plates required for the distillation may be changed. In order to ensure, it can also be formed by a packing consisting of several nodes, depending on the characteristics of the packing used. Also, a distributor can be arranged between the nodes. Further, the feed nozzle 41
It is not always necessary to arrange the supply / discharge nozzle 42 at the same height.

As described above, in the second operation mode, the stock solution M can be separated into each of the components A to C without using a plurality of distillation columns.

Further, since it is not necessary to repeat heating and cooling in a plurality of distillation columns, a condenser, an evaporator,
It is not necessary to dispose many instrument parts such as pumps. Therefore, the distillation apparatus can be downsized, the occupied area can be reduced, the usage amount and energy consumption of the utility can be reduced, and the cost of the distillation apparatus can be reduced. According to a trial calculation, the occupied area, the usage amount of the utility, and the energy consumption can all be reduced by about 30%.

Further, since the recovery unit is provided, the energy consumption can be reduced, the product recovery rate can be increased, and the separation performance of each of the components A to C and the product purity can be increased. be able to. Moreover, undiluted solution M
Can be continuously supplied to the combined distillation column 10 to be distilled, so that the operation rate and processing capacity of the distillation apparatus can be increased.

Next, the third operation mode will be described.

FIG. 8 is a diagram showing a distillation process in the third operation mode according to the embodiment of the present invention.

In the third operating mode, the distillation apparatus is used as a multipurpose continuous distillation apparatus. Therefore, the switching valves K1 and K3 are opened, the switching valve K2 is closed, and both the feed nozzle 41 and the supply / discharge nozzle 42 are used. Then, the stock solution M is supplied to the combined distillation column 10 via the feed nozzle 41 and the supply / discharge nozzle 42,
The distillate is discharged via the distillate outlet 43, the reflux liquid is refluxed to the combined distillation column 10 via the reflux liquid inlet 44, and the bottom liquid is discharged via the bottom liquid outlet 45. The effluent vapor is supplied to the combined distillation column 10 via the vapor inlet 46. In this case, the supply / discharge nozzle 42 functions as a feed nozzle.

Further, the areas AR1 (FIG. 5), AR3,
By AR4, the enrichment part becomes regions AR2, AR5, AR6.
The recovery part is formed by.

In the first distillation process, for example,
When diluting the stock solution M containing the three components A to C, the stock solution M is supplied to the combined distillation column 10 via the line L11 and the feed nozzle 41, and is also combined via the line L21 and the feed / discharge nozzle 42. When supplied to the type distillation column 10, the vapor moves upward in the regions AR1, AR3, and AR4 to perform fractional distillation, and the vapor rich in the component A is condensed by the cooling water in the condenser 81 to generate the component A. Liquid rich in component A, the liquid rich in component A is discharged as a distillate through the distillate outlet 43 to the line L12, and the liquid rich in components B and C is discharged as a bottom liquid. It is discharged to the line L15 via 45. In addition, a part of the distillate is refluxed through the line L14.

Then, the bottom liquid is the bottom liquid outlet 45,
The charging pot 3 via the line L15 and the bottom outlet 36
4, and is further supplied as an intermediate stock solution to a stock solution tank (not shown) via a circulating solution outlet 38 and lines L17 and L18. Further, a part of the bottom liquid is circulated through the circulating liquid outlet 38 and the line L17, and is heated by the heat source steam S in the reboiler 35 to be the component B,
The vapor becomes rich in C, and the vapors rich in the components B and C are supplied to the charging pot portion 34. The steam rich in the components B and C is the steam outlet 37, the line L16, and the steam inlet 4.
It is supplied to the combined distillation column 10 via 6.

Subsequently, the intermediate stock solution is supplied to the combined distillation column 10 through the line L11 and the feed nozzle 41, and is supplied to the combined distillation column 10 through the line L21 and the feed / discharge nozzle 42. The liquid rich in B is discharged to the line L12 as a distillate through the distillate outlet 43, and the liquid rich in the component C is discharged as a bottoms to the line L15 via the bottoms outlet 45.

Then, the bottom liquid is the bottom liquid outlet 45,
The charging pot 3 via the line L15 and the bottom outlet 36
4 to the circulating fluid outlet 38 and the line L1.
It is supplied to the bottoms liquid supply destination (not shown) via No. 7 and L18.

In the second distillation process, for example, when distilling the stock solution M containing the three components A to C, the stock solution M is fed to the combined distillation column 10 via the line L11 and the feed nozzle 41. Supply line L
When it is supplied to the combined distillation column 10 via 21 and the supply / discharge nozzle 42, the liquid rich in components A and B is discharged as a distillate into the line L12 via the distillate outlet 43 and rich in the component C. The liquid is discharged as a bottom liquid to the line L15 through the bottom liquid outlet 45.

Then, the bottom liquid is the bottom liquid outlet 45,
The charging pot 3 via the line L15 and the bottom outlet 36
4, and is further supplied as an intermediate stock solution to a stock solution tank (not shown) via a circulating solution outlet 38 and lines L17 and L18. Further, a part of the bottom liquid is circulated through the circulating liquid outlet 38 and the line L17 and heated in the reboiler 35 to become vapor rich in component C. The vapor rich in component C is charged. It is supplied to the hook portion 34. Then, the vapor rich in the component C passes through the vapor outlet 37, the line L16 and the vapor inlet 46, and the combined distillation column 10
Is supplied to.

Subsequently, the intermediate stock solution is supplied to the combined distillation column 10 via the line L11 and the feed nozzle 41, and is also supplied to the combined distillation column 10 via the line L21 and the feed / discharge nozzle 42. The liquid rich in A is discharged as a distillate to the line L12 through the distillate outlet 43, and the liquid rich in component B is discharged as a bottoms liquid to the line L15 through the bottom liquid outlet 45.

Then, the bottom liquid is the bottom liquid outlet 45,
The charging pot 3 via the line L15 and the bottom outlet 36
4 to the circulating fluid outlet 38 and the line L1.
It is supplied to the bottoms liquid supply destination (not shown) via No. 7 and L18.

As described above, in the third operation mode, the stock solution M can be separated into the respective components A to C without using a plurality of distillation columns.

Further, since it is not necessary to repeat heating and cooling respectively in a plurality of distillation columns, a condenser, an evaporator,
It is not necessary to dispose many instrument parts such as pumps. Therefore, the distillation apparatus can be downsized, the occupied area can be reduced, the usage amount and energy consumption of the utility can be reduced, and the cost of the distillation apparatus can be reduced.

Further, since the recovery unit is provided, the energy consumption can be reduced, the product recovery rate can be increased, and the separation performance of each of the components A to C and the product purity can be increased. be able to. Moreover, undiluted solution M
Can be continuously supplied to the combined distillation column 10 to be distilled, so that the operation rate and processing capacity of the distillation apparatus can be increased.

Next, the fourth operation mode, which is extremely effective when a small amount of the stock solution M is used to obtain a large number of kinds of products little by little, will be described.

FIG. 9 is a diagram showing a distillation process in the fourth operation mode according to the embodiment of the present invention.

In the fourth operation mode, the distillation apparatus is used as a semi-batch type distillation apparatus in which a batch type distillation apparatus and a continuous distillation apparatus are combined. Therefore, in the first stage, the open / close valve V8 is opened, the switching valves K1 to K3 are closed, the bottom outlet 45 and the steam inlet 46 are used, and neither the feed nozzle 41 nor the supply / discharge nozzle 42 is used. . Further, the flow rate control valve V2 is closed and the reflux pump P1 is operated. Next, in the second stage, the on-off valve V8 and the switching valve K3 are closed, the switching valves K1 and K2 are opened, and the feed nozzle 41, the supply / discharge nozzle 42, the bottom outlet 45 and the steam inlet 46 are all used. To be done. Further, the flow control valve V2 is opened, and the reflux pump P
1, the side cut liquid pump P2 and the circulation pump P3 are operated.

Then, for example, in the case of distilling the stock solution M containing the three components A to C, in the first step, the distillation apparatus is used as a batch-type distillation apparatus, and the stock solution M is fed to the line L1.
1, L24 is supplied to the charging pot portion 34, the liquid in the charging pot portion 34 is circulated as a circulating liquid through the circulating liquid outlet 38 and the line L17, and is heated by the heat source steam S in the reboiler 35. When the steam generated at this time is supplied to the combined distillation column 10 through the steam outlet 37, the line L16 and the steam inlet 46, the steam moves upward in the combined distillation column 10 to perform fractional distillation. , Component A after being condensed by cooling water in the condenser 81
The liquid rich in component A is discharged as a distillate to the line L12 via the distillate outlet 43.

By the way, in the first stage, the flow control valve V2 is closed and the reflux pump P1 is operated to perform the total reflux operation. Therefore, since the distillate is discharged to the line L12 via the distillate outlet 43, it is refluxed as the reflux liquid to the combined distillation column 10 via the line L14 and the reflux liquid inlet 44, so that the combined distillation column is Liquid and vapor rich in component A accumulate in the top portion of the column 10, liquid and vapor rich in component B in the central portion, and liquid and vapor rich in component C accumulate in the bottom portion of the column, and A liquid rich in component C is stored in the charging pot portion 34. It should be noted that the stock solution M is supplied in the minimum amount that allows the total reflux operation.

During that time, the timer τ is used to measure the time, and when the preset time elapses, the second stage is entered. In the second stage, when the on-off valve V8 is closed and the changeover valves K1 and K2 are opened, the distillation apparatus is used as a continuous distillation apparatus, and the stock solution M is combined with the combined distillation through the line L11 and the feed nozzle 41. Component A supplied to tower 10
Rich liquid is discharged to the line L12 as distillate,
Liquid rich in component B is line L1 as side cut liquid
The liquid rich in component C is discharged to the line L15.

In the second stage, the flow rate control valve V6
Since it is closed, the liquid rich in the component C is stored in the charging pot portion 34 and is not supplied to the canned liquid supply destination (not shown).

When the distillation process consisting of the first stage and the second stage is repeated in this way, the liquid rich in the component A is discharged as the distillate through the distillate outlet 43 to the line L12 and the component B is discharged. The liquid rich in C is discharged to the line L13 via the supply / discharge nozzle 42 as a side cut liquid and is supplied to the distillate supply destinations not shown respectively, and the liquid rich in the component C is stored in the charging pot portion 34.

Then, when the stock solution M in the stock solution tank (not shown) is exhausted or the level of the liquid rich in the component C in the charging pot portion 34 is detected to reach the upper limit, the supply of the stock solution M is stopped. Then, the total reflux operation is performed again, a small amount of the active ingredient remaining in the liquid rich in the ingredient C in the charging pot portion 34, that is, the ingredients A and B, is distilled off, and then the ingredient A is discharged from the distillate outlet 43. To component L via line L12
Is discharged to the line L13 through the supply / discharge nozzle 42.

When the liquid rich in component C in the charging pot portion 34 contains a high-boiling substance other than the component C, the liquid rich in component C in the charging pot portion 34 is continuously added. Component C generated by heating in reboiler 35 at this time
Rich vapor is fed to the combined distillation column 10 via the vapor outlet 37, line L16 and vapor inlet 46. As a result, the vapor rich in component C moves upward in the combined distillation column 10 and is condensed in the condenser 81 to become a liquid rich in component C. The liquid rich in component C is distilled out. The liquid is discharged to the line L12 via the distillate outlet 43 and supplied to the distillate supply destination. The distillation of the liquid enriched in the component C is stopped when the level of the liquid enriched in the component C in the charging pot portion 34 reaches the lower limit or the purity of the component C in the distillate becomes lower than the allowable value. . Then, the charging pot portion 34
The high-boiling substances other than the component C in the inside are circulating liquid outlet 3 as a residue.
8 and the lines L17 and L18 to a residue supply destination (not shown).

When the liquid rich in the component C does not contain any high-boiling substance other than the component C, the liquid rich in the component C in the charging pot portion 34 is the circulating liquid outlet 38 and the line L.
It is supplied to the bottoms supply destination via 17 and L18.

As described above, in the fourth operation mode, the distillation apparatus is used as a batch type distillation apparatus to perform total reflux operation, and then used as a continuous distillation apparatus. The separation performance of A to C and the purity of the product can be made higher than those of the batch distillation apparatus. Moreover, since the distillation apparatus is provided with the recovery unit when it is used as a continuous distillation apparatus, it is possible to reduce energy consumption and increase the product recovery rate.

Further, since a liquid rich in component C having the highest boiling point can be obtained as a distillate, when the distillate is taken out as a product, a hue, a fragrance, etc. remain in the product, metal, sludge and the like. It is possible to prevent the inclusion of the like.

Moreover, the throughput per unit time can be made higher than that of the batch type distillation apparatus, and the throughput can be improved.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention, and they are not excluded from the scope of the present invention.

[0127]

As described in detail above, according to the present invention, in the distillation apparatus, a charging pot portion for storing a liquid, a heating portion for heating the liquid to generate vapor, and a distillation unit at the top of the column. A liquid discharge part and a reflux liquid reception part, a can discharge liquid discharge part and a steam reception part at the bottom of the tower, and a feed nozzle and a supply / discharge nozzle are formed at the tower side. A first distillation chamber is formed on the nozzle side, and a second distillation chamber is formed on the supply / discharge nozzle side, and selectively between a line connected to the feed nozzle and a line connected to the supply / discharge nozzle. And a communicating means for communicating.

In this case, the distillation apparatus is used as a batch-type distillation apparatus by supplying the stock solution to the charging pot section, and the stock solution is supplied to the combined distillation section via the feed nozzle to thereby install the distillation apparatus. It is used as a continuous distillation apparatus, and by supplying the stock solution to the combined distillation section through the feed nozzle and the feed / discharge nozzle, the distillation apparatus is used as a multipurpose continuous distillation apparatus, and the stock solution is
The distillation apparatus can be used as a semi-batch type distillation apparatus by supplying to the charging pot section in the stage and supplying to the combined distillation section via the feed nozzle in the second step.

Therefore, when the distillation apparatus is used as a batch type distillation apparatus, the distillation process can be simplified even when the stock solution contains a large number of components.
The distillation process is not constrained by the type of stock solution, ingredients, etc.

When the distillation apparatus is used as a continuous distillation apparatus, the stock solution can be separated into each component without using a plurality of distillation columns.

Since it is not necessary to repeat heating and cooling in each of a plurality of distillation columns, it is not necessary to provide a large number of instrument parts such as a condenser, an evaporator and a pump.
Therefore, the distillation apparatus can be downsized, the occupied area can be reduced, the usage amount and energy consumption of the utility can be reduced, and the cost of the distillation apparatus can be reduced. In addition,
According to a trial calculation, the occupied area, the usage amount of the utility, and the energy consumption can be reduced by about 30%.

Further, since the recovery section is provided, the energy consumption can be reduced, the product recovery rate can be increased, and the separation performance of each component and the product purity can be increased. . Moreover, since the stock solution can be continuously supplied to the combined distillation section for distillation, the operation rate and the processing capacity of the distillation apparatus can be increased.

When the distillation apparatus is used as a multipurpose continuous distillation apparatus, it is possible to use a plurality of distillation columns without using a plurality of distillation columns.
The stock solution can be separated into each component.

Since it is not necessary to repeat heating and cooling in each of a plurality of distillation columns, it is not necessary to provide a large number of instrument parts such as condensers, evaporators, pumps and the like.
Therefore, the distillation apparatus can be downsized, the occupied area can be reduced, the usage amount and energy consumption of the utility can be reduced, and the cost of the distillation apparatus can be reduced.

Further, since the recovery unit is provided, the energy consumption can be reduced, the product recovery rate can be increased, and the separation performance of each component and the product purity can be increased. . Moreover, since the stock solution can be continuously supplied to the combined distillation section for distillation, the operation rate and the processing capacity of the distillation apparatus can be increased.

When the distillation apparatus is used as a semi-batch type distillation apparatus, the separation performance of each component and the product purity can be made higher than those of the batch type distillation apparatus. Moreover,
Since the distillation apparatus is provided with the recovery unit, energy consumption can be reduced and product recovery rate can be increased.

Further, since a liquid rich in the component having the highest boiling point can be obtained as a distillate, when the distillate is taken out as a product, hue, fragrance, etc. remain in the product,
It is possible to prevent mixing of metal, sludge, and the like.

In addition, the throughput per unit time can be made higher than that of the batch type distillation apparatus, and the throughput can be improved.

[Brief description of 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 first distillation apparatus.

FIG. 3 is a conceptual diagram of a second conventional distillation apparatus.

FIG. 4 is a conceptual diagram of a third conventional distillation apparatus.

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

FIG. 6 is a diagram showing a distillation process in the first operation mode according to the embodiment of the present invention.

FIG. 7 is a diagram showing a distillation process in the second operation mode according to the embodiment of the present invention.

FIG. 8 is a diagram showing a distillation process in a third operation mode according to an embodiment of the present invention.

FIG. 9 is a diagram showing a distillation process in a fourth operation mode according to an embodiment of the present invention.

[Explanation of symbols]

10 Combined distillation column 22 Partition 34 Charge pot 35 Reboiler 41 Feed nozzle 42 supply / discharge nozzle 43 Distillate outlet 44 Reflux liquid inlet 45 cans outlet 46 Steam inlet 14A-16A First room 14B-16B 2nd room K3 switching valve L11, L13, L21 lines M stock solution

Front page continuation (72) Inventor Yoichi Harada 2-1-1 Yadocho, Tanashi-shi, Tokyo Sumitomo Heavy Industries, Ltd. Tanashi Factory (56) Reference JP-A-6-170103 (JP, A) Sho 59-142801 (JP, A) JP-A-7-136403 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 3/00-3/42

Claims (5)

(57) [Claims] 1. A charging pot portion for storing (a) a liquid,
(B) a heating unit that heats the liquid to generate steam,
(C) A distillate discharge part and a reflux liquid reception part are formed on the top of the tower, a bottoms discharge part and a steam reception part are formed on the bottom of the tower, and a feed nozzle and a supply / discharge nozzle are formed on the tower side, and the inside of the tower main body is formed. A combined distillation section partitioned by a partition to form a first chamber on the feed nozzle side and a second chamber on the supply / discharge nozzle side;
(D) A distillation apparatus comprising: a communication means for selectively communicating a line connected to the feed nozzle and a line connected to the supply / discharge nozzle. 2. The distillation apparatus according to claim 1, wherein the stock solution is supplied to the charging pot section. 3. The distillation apparatus according to claim 1, wherein the stock solution is supplied to the combined distillation section via the feed nozzle. 4. The distillation apparatus according to claim 1, wherein the undiluted solution is supplied to the combined distillation section via the feed nozzle and the supply / discharge nozzle. 5. The distillation apparatus according to claim 1, wherein the undiluted solution is supplied to the charging pot section in the first step, and is supplied to the combined distillation section via the feed nozzle in the second step.