JP2018176055A - Distillation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress modification of a low-boiling point component.SOLUTION: A distillation apparatus 100 comprises: a distillation part 120 which has a body 210 having a distillate fluid discharge port 212a, a bottom product discharge port 212b and a raw material liquid supply port 212c, a recover part 124, and a concentration part 126; a bottom product storage container 132 which is connected to the bottom product discharge port 212b and has a vent port; a distillate fluid storage container 140 which is connected to the distillate fluid discharge port 212a and has a vent port; and a vacuum container 150 which accommodates at least the distillation part 120, the bottom product storage container 132, and the distillate fluid storage container 140.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a distillation apparatus that separates a raw material liquid including low boiling point components and high boiling point components into a distillate and a bottoms.

  Distillation apparatuses are used for distillation of alcoholic beverages, edible oils, petrochemicals, etc., removal of ammonia, recovery of carbon dioxide, and manufacture of pharmaceuticals. The distillation apparatus is an apparatus for separating a raw material liquid including low-boiling components and high-boiling components into a distillate and a bottoms.

  As such a distillation apparatus, an apparatus provided with a plate column having a plurality of shelves provided therein, a reboiler (collection unit), and a condenser (concentration unit) is known (for example, Patent Document 1) . In the distillation apparatus described in Patent Document 1, the raw material liquid is supplied to the center of the plate column. The reboiler heats the liquid discharged from the bottom of the plate column to generate steam. The steam generated by the reboiler is returned to the bottom of the tray column. The condenser cools the vapor discharged from the top of the tray column to produce distillate. A portion of the distillate produced by the condenser is refluxed to the top of the tray column.

Japanese Patent Application Laid-Open No. 2003-089674

  In the distillation apparatus of Patent Document 1, the tray tower, the reboiler, and the condenser are at atmospheric pressure or higher. Therefore, when the boiling point of the low boiling point component is relatively high, if the liquid is heated by the reboiler to evaporate the low boiling point component, the low boiling point component may be denatured.

  This indication aims at providing a distillation device which can control modification of a low boiling point ingredient in view of such a subject.

  In order to solve the above-mentioned subject, the distillation device of the present invention is a raw material provided between a distillate fluid outlet, a bottoms outlet, the distillate fluid outlet and the bottoms outlet. A main body having a liquid supply port, a recovery unit for heating between the raw material liquid supply port and the bottoms discharge port in the main body, the raw material liquid supply port and the distillate fluid discharge port in the main body And one or more distillation sections having a concentration section for cooling between the two or more, and a bottoms storage container connected to the bottoms outlet and having a vent port, and connected to the distillate fluid outlet, A distillation fluid storage container having a vent port, and a pressure reduction container for accommodating at least the distillation unit, the bottoms storage container, and the distillation fluid storage container are provided.

  Moreover, you may provide the raw material liquid supply pump which supplies a raw material liquid to the said main body of the said distillation part.

  The raw material liquid storage container having a vent port provided in the decompression container is provided, and the raw material liquid supply pump supplies the raw material liquid stored in the raw material liquid storage container to the raw material liquid supply port. It is also good.

  Further, the distillation section is erected from the bottom surface of the main body, and stands from the bottom surface of the main body with one or a plurality of first ribs extending from the raw material liquid supply port side to the can liquid discharge port side. It may have, and it may have one or a plurality of 2nd ribs extended from the distillate fluid outlet side to the above-mentioned raw material liquid supply port side.

  According to the present disclosure, it is possible to suppress denaturation of low boiling point components.

It is a figure explaining a schematic structure of a distillation device. It is an exploded perspective view of a separation unit.

  Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values and the like shown in the embodiments are merely examples for facilitating understanding and do not limit the present disclosure unless otherwise specified. In the present specification and the drawings, elements having substantially the same functions and configurations will be denoted by the same reference numerals and redundant description will be omitted. Also, elements not directly related to the present disclosure are not shown.

(Distillation apparatus 100)
FIG. 1 is a view for explaining the schematic configuration of the distillation apparatus 100. As shown in FIG. In FIG. 1, the flow of liquid is indicated by a solid arrow, the flow of gas is indicated by a broken arrow, and the flow of the gas-liquid mixture is indicated by a dashed dotted arrow. The distillation apparatus 100 includes a raw material liquid including a low boiling point component (for example, having a boiling point of 100 ° C. or higher) and a high boiling point component having a boiling point higher than that of the low boiling point component. It is an apparatus for separating a distillate and a bottoms liquid having a high boiling point component from the raw material liquid at a high concentration. The raw material liquid is, for example, an edible oil, a physiologically active substance or the like.

  As shown in FIG. 1, the distillation apparatus 100 includes a raw material liquid storage tank 110, a first raw material liquid supply pump 112 (raw material liquid supply pump), a raw material liquid storage container 114, and a second raw material liquid supply pump 116 (raw material Liquid supply pump), distillation unit 120, bottomed liquid discharge pump 130, bottomed liquid storage container 132, first cooling portion 134, bottomed liquid delivery pump 136, distilled fluid storage container 140, A second cooling unit 142, a distillate delivery pump 144, a pressure reducing container 150, a pressure reducing pump 152, and a mist filter 154 are included.

The raw material liquid storage tank 110 is a container for storing the raw material liquid. The raw material liquid storage tank 110 is purged (purged) of the internal space with nitrogen (N ₂ ). Thereby, the oxidation of the raw material solution can be prevented. The suction side of the first raw material liquid supply pump 112 is connected to the raw material liquid storage tank 110, and the discharge side is connected to the raw material liquid storage container 114. The first raw material liquid supply pump 112 delivers the raw material liquid stored in the raw material liquid storage tank 110 to the raw material liquid storage container 114.

  The raw material liquid storage container 114 stores the raw material liquid delivered from the raw material liquid storage tank 110 by the first raw material liquid supply pump 112. The raw material liquid storage container 114 is configured of a container (hereinafter, referred to as a “vented container”) having a vent opening (opening) formed on the upper surface. The suction side of the second raw material liquid supply pump 116 is connected to the raw material liquid storage container 114 via a pipe. The discharge side of the second raw material liquid supply pump 116 is connected to the distillation unit 120 (raw material liquid supply port 212 c) via a pipe. The second raw material liquid supply pump 116 supplies the raw material liquid stored in the raw material liquid storage container 114 to the distillation unit 120.

  The distillation unit 120 distills the raw material liquid. The distillation unit 120 includes a separation unit 122, a recovery unit 124, and a concentration unit 126. The separation unit 122 is made of a metal material such as stainless steel and accommodates the raw material liquid therein.

  FIG. 2 is an exploded perspective view of the separation unit 122. As shown in FIG. In FIG. 2 of this embodiment, an X axis (horizontal direction), a Y axis (horizontal direction), and a Z axis (vertical direction) which vertically intersect are defined as illustrated. As shown in FIG. 2, the separation unit 122 includes a main body 210 and ribs 220A and 220B.

  The main body 210 is a prismatic hollow member formed of a metal material. The main body 210 is configured to include a bottom surface 212, a top surface 214, and a side surface 216. A distillate fluid discharge port 212 a is formed on one end side of the bottom surface 212. At the other end side of the bottom surface 212, a bottoms discharge port 212b is formed. A raw material liquid supply port 212c is formed between the distillate fluid discharge port 212a and the bottoms liquid discharge port 212b on the bottom surface 212.

  The rib 220A (first rib) is a member which is erected from the bottom surface 212 and extends from the side of the raw material liquid supply port 212c to the side of the can liquid outlet 212b. The rib 220B (second rib) is a member which is erected from the bottom surface 212 and extends from the side of the distillate fluid discharge port 212a to the side of the raw material liquid supply port 212c. A plurality of (here, six) ribs 220A and 220B are provided. In the present embodiment, the width of the proximal end 222 (the width in the X-axis direction in FIG. 2) of the ribs 220A and 220B is larger than the width of the distal end 224. Also, the tips 224 of the ribs 220A, 220B are separated from the top surface 214.

  The dimensional relationship of the separation unit 122 will be described. The distance between the proximal ends 222 of the adjacent ribs 220A is, for example, about 1 mm. The distance between the tips 224 of the adjacent ribs 220A is, for example, about 2 mm. The distance between adjacent ribs 220B is substantially equal to the distance between adjacent ribs 220A. The heights of the ribs 220A and 220B (the height from the proximal end 222 to the distal end 224, the height in the Z-axis direction in FIG. 2) are, for example, about 3 mm. Further, the distance between the tip end 224 of the rib 220A, 220B and the upper surface 214 is, for example, about 100 μm to 10 mm (here, 1 mm). Furthermore, the length L from the center of the distillate fluid outlet 212a to the center of the bottoms outlet 212b is, for example, 300 mm.

  Further, in the present embodiment, the separation unit 122 (bottom surface 212, top surface 214) is inclined vertically downward (Z-axis direction in FIG. 2) from the distillate fluid discharge port 212a toward the can liquid discharge port 212b. . The inclination angle of the separation unit 122 is, for example, about 2.5 degrees.

  Referring back to FIG. 1, the recovery unit 124 includes, for example, an electric heater, an oil heater, and the like. The recovery unit 124 heats between the raw material liquid supply port 212 c and the bottoms discharge port 212 b in the main body 210 of the separation unit 122. The recovery unit 124 heats the space between the raw material liquid supply port 212 c and the bottoms discharge port 212 b in the main body 210 above the boiling point of the low boiling point component.

  The concentration unit 126 includes, for example, a water cooler, an oil cooler, and the like. The concentration unit 126 cools the space between the raw material liquid supply port 212 c and the distillate fluid discharge port 212 a in the main body 210 of the separation unit 122. The concentration unit 126 cools the space between the raw material liquid supply port 212 c and the distillate fluid discharge port 212 a in the main body 210 to less than the boiling point of the low boiling point component.

  The suction side of the bottomed liquid discharge pump 130 is connected to the bottomed liquid discharge port 212 b through a pipe. The discharge side of the can liquid discharge pump 130 is connected to the can liquid storage container 132 via a pipe. The bottoms discharge pump 130 drains the bottoms from the separation unit 122 through the bottoms discharge port 212b. The can solution storage container 132 is configured of a container with a vent. The bottomed liquid storage container 132 stores the bottomed liquid drawn by the bottomed liquid discharge pump 130. The first cooling unit 134 cools the bottoms storage container 132 to a temperature lower than the boiling point of the low boiling point component. A suction side of the bottoms delivery pump 136 is connected to the bottoms storage container 132 through a pipe. The bottoms delivery pump 136 sends the bottoms stored in the bottoms storage container 132 to the outside. A check valve 136 a is provided in the pipe connecting the can liquid storage container 132 and the can liquid delivery pump 136.

  The distillate fluid storage container 140 is configured of a vented container. The distillate fluid storage container 140 stores the distillate fluid (gas-liquid mixture) discharged from the separation unit 122 through the distillate fluid outlet 212a. The second cooling unit 142 cools the distillate fluid storage container 140 below the boiling point of the low boiling point component. Therefore, the distillate fluid introduced into the distillate fluid storage container 140 condenses and becomes a liquid (distillate). The suction side of the distillate delivery pump 144 is connected to the distillate fluid reservoir 140 via a pipe. The distillate delivery pump 144 delivers the distillate stored in the distillate fluid storage container 140 to the outside. A check valve 144 a is provided in the pipe connecting the distillate fluid storage container 140 and the distillate liquid delivery pump 144.

  The decompression container 150 is a sealed container. The decompression container 150 accommodates the raw material liquid storage container 114, the second raw material liquid supply pump 116, the distillation unit 120, the bottoms discharge pump 130, the bottoms storage container 132, and the distillate fluid storage container 140 inside.

  The suction side of the decompression pump 152 is connected to the decompression container 150 via a pipe. The decompression pump 152 decompresses the decompression container 150. The decompression pump 152 decompresses the inside of the decompression container 150 to, for example, 1 Pa or more and less than 100 Pa. A mist filter 154 is provided in the pipe connecting the pressure reducing pump 152 and the pressure reducing container 150.

  Subsequently, distillation of the raw material liquid by the distillation apparatus 100 will be described. First, the raw material liquid is delivered from the raw material liquid storage tank 110 to the raw material liquid storage container 114 by the first raw material liquid supply pump 112. The raw material liquid storage container 114 is configured of a vented container, and is accommodated in the decompression container 150. Therefore, nitrogen can be degassed from the raw material liquid through the vent port of the raw material liquid storage container 114. The inside of the pressure reducing container 150 is filled with nitrogen degassed from the raw material liquid storage container 114.

  The second raw material liquid supply pump 116 supplies the raw material liquid from the raw material liquid storage container 114 to the raw material liquid supply port 212 c of the separation unit 122. As described above, the separation unit 122 is inclined vertically downward from the distillate fluid discharge port 212a toward the bottoms discharge port 212b. For this reason, the raw material liquid flows in the separation unit 122 (between the ribs 220A and between the ribs 220B) toward the bottoms discharge port 212b.

  The space between the raw material liquid supply port 212 c and the bottoms liquid discharge port 212 b in the separation unit 122 is heated by the recovery unit 124 above the boiling point of the low boiling point component. For this reason, the raw material liquid is heated in the process of flowing in the separation unit 122 from the raw material liquid supply port 212 c toward the bottoms discharge port 212 b. Thus, in the separation unit 122, a vapor (gas) containing a large amount of low boiling point components is generated from the raw material liquid.

  In addition, the production amount of the steam (hereinafter, simply referred to as "steam") containing a large amount of low boiling point components increases as going from the raw material liquid supply port 212c to the bottoms discharge port 212b. For this reason, a pressure difference occurs between the raw material liquid supply port 212 c side and the bottoms discharge port 212 b side in the separation unit 122. That is, the pressure on the side of the bottoms liquid discharge port 212b is higher than that on the side of the raw material liquid supply port 212c. Therefore, the vapor generated in the separation unit 122 flows in the direction opposite to the flow of the liquid, that is, the raw material liquid supply port 212c (distillation fluid discharge port 212a).

  The portion between the raw material liquid supply port 212 c and the distillate fluid discharge port 212 a in the separation unit 122 is cooled to less than the boiling point of the low boiling point component by the concentration unit 126. For this reason, the vapor is cooled in the process of flowing in the separation unit 122 from the raw material liquid supply port 212 c toward the distillate fluid discharge port 212 a. Thereby, in the separation unit 122, the low boiling point component and the high boiling point component contained in the vapor are condensed to become a liquid (condensed liquid). Then, the condensate flows under its own weight toward the bottom outlet 212b. Thereby, refluxing is achieved, and the distillation efficiency of the low boiling point component and the high boiling point component can be improved.

  Then, the liquid and gas condensed in the region above the distillate fluid outlet 212a in the separation unit 122 are stored as a distillate fluid in the distillate fluid storage container 140 through the distillate fluid outlet 212a. The distillate fluid storage container 140 is configured of a vented container, but is cooled by the second cooling unit 142 to less than the low boiling point component. Therefore, almost no gas is released from the vent port of the distillate fluid storage container 140. The distillate delivery pump 144 delivers the distillate from the distillate fluid storage container 140 to the outside. As described above, the check valve 144 a is provided in the pipe connecting the distillate fluid storage container 140 and the distillate liquid delivery pump 144. As a result, it is possible to prevent the situation in which the distillate or air flows back from the distillate delivery pump 144 to the distillate fluid storage container 140.

  On the other hand, the liquid from which the vapor has been removed in the separation unit 122 (liquid that has not evaporated) is extracted out of the separation unit 122 by the bottoms discharge pump 130 through the bottoms outlet 212b as bottoms. The bottoms drawn by the bottoms discharge pump 130 is stored in the bottoms storage container 132. The bottoms liquid storage container 132 is configured of a vented container, but is cooled to less than the low boiling point component by the first cooling unit 134. Therefore, almost no gas is released from the vent port of the bottoms storage container 132. Then, the canned liquid delivery pump 136 delivers the canned liquid from the canned liquid storage container 132 to the outside. As described above, a check valve 136 a is provided in the pipe connecting the can liquid storage container 132 and the can liquid delivery pump 136. Thus, it is possible to prevent a situation in which the can solution or air flows back from the can solution discharging pump 136 to the can solution storage container 132.

  As described above, in the distillation apparatus 100 of the present embodiment, the raw material liquid storage container 114, the second raw material liquid supply pump 116, the distillation unit 120, the bottoms discharge pump 130, the bottoms storage container 132, and the distillate fluid The storage container 140 is accommodated in the decompression container 150. Thereby, the inside of the separation unit 122 which comprises the distillation part 120 can be pressure-reduced to less than atmospheric pressure. Therefore, it becomes possible to lower the boiling point of the low boiling point component contained in the raw material liquid. For this reason, compared with the case where the inside of separation unit 122 is atmospheric pressure or more, the heating temperature by recovery part 124 can be lowered. Therefore, it becomes possible to suppress denaturation of the low boiling point component. Further, compared with the case where the inside of the separation unit 122 is at the atmospheric pressure or higher, the energy consumption of the recovery unit 124 can be reduced.

  In addition, the structure which pressure-reduces the inside of the separation unit 122 with a pressure reduction pump is also considered. However, in this configuration, the amount of vapor in the separation unit 122 is reduced by the amount of suction by the pressure reducing pump, so there is a problem that the distillate is reduced.

  On the other hand, in the distillation apparatus 100 of the present embodiment, only the low boiling point components are released only from the raw material liquid storage container 114, the bottoms liquid storage container 132, and the vent port of the distillate fluid storage container 140. In addition, since the raw material liquid storage container 114 is at normal temperature (for example, 25 ° C.), the low boiling point component is hardly released. Further, although liquid having a temperature higher than normal temperature is supplied to the bottoms storage container 132 and the distillate fluid storage container 140, the liquid is cooled by the first cooling unit 134 and the second cooling unit 142. Therefore, the low boiling point component is hardly released from the bottoms storage container 132 and the distillate fluid storage container 140 as well. Therefore, compared with the structure which pressure-reduces the inside of the separation unit 122 with a pressure reduction pump, a distillate can be made to increase.

  A very small amount of low boiling point components released from the raw material liquid storage container 114, the bottoms liquid storage container 132, and the vent port of the distillate fluid storage container 140 is collected by the mist filter 154. For this reason, the situation where the low boiling point component mixes in the decompression pump 152 can be avoided.

  Further, in the distillation apparatus 100 of the present embodiment, the separation unit 122 is configured such that the raw material liquid and the condensate flow between the ribs 220A or between the ribs 220B. When the flow channel width through which the liquid flows is large, the surface tension of the liquid causes a large difference between the flow velocity of the liquid flowing on the end side of the flow channel and the flow velocity of the liquid flowing on the central side of the flow channel. Therefore, by setting the width between the ribs 220A and the ribs 220B to 2 mm or less, the difference between the flow velocity of the liquid flowing on the end side of the flow passage and the flow velocity of the liquid flowing on the center side of the flow passage is reduced. It is possible to achieve uniform flow velocity in the flow path.

  Although the embodiments have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to the above embodiments. It is apparent that those skilled in the art can conceive of various modifications and alterations within the scope of the claims, and it is understood that they are naturally within the technical scope of the present disclosure. Be done.

  For example, in the above embodiment, the configuration in which one distillation unit 120 is accommodated in the decompression container 150 has been described as an example. However, the plurality of distillation units 120 may be accommodated in the decompression container 150.

  Moreover, in the said embodiment, the case where the container with a vent was a container by which the vent port was formed in the upper surface was mentioned as the example, and was demonstrated. However, the vented container may have a vent port formed on the side.

  Moreover, in the said embodiment, the distillation apparatus 100 mentioned and demonstrated the example provided with the raw material liquid storage container 114 and the 2nd raw material liquid supply pump 116 which were accommodated in the pressure reduction container 150 as an example. However, the raw material liquid storage container 114 and the second raw material liquid supply pump 116 are not essential components. For example, the first raw material liquid supply pump 112 disposed outside the decompression container 150 may directly supply the raw material liquid to the raw material liquid supply port 212 c. Further, in this case, instead of the first raw material liquid supply pump 112, a pipe that connects the raw material liquid storage tank 110 and the raw material liquid supply port 212c may be provided with a flow control valve. By controlling the opening degree of the flow rate adjustment valve, it is possible to control the supply amount of the raw material liquid.

  Further, in the above embodiment, the configuration has been described in which the bottom surface 212 of the separation unit 122 is inclined vertically downward from the distillate fluid discharge port 212a toward the can liquid discharge port 212b. However, the bottom surface 212 may extend in the horizontal direction.

  Further, in the above embodiment, the dimensional relationship and the inclination angle of the separation unit 122 have been described. However, the separation unit 122 is appropriately set based on the ratio of the low boiling point component and the high boiling point component in the raw material liquid, the target distillation efficiency, and the supply flow rate (processing speed) of the raw material liquid by the second raw material liquid supply pump 116. It should be done.

  Further, in the above embodiment, the configuration in which the separation unit 122 includes the ribs 220A and 220B has been described as an example. However, the porous body may be placed on the main body 210 instead of the ribs 220A and 220B. By placing the porous body, the difference between the flow velocity of the liquid flowing on the end side of the flow channel and the flow velocity of the liquid flowing on the central side of the flow channel is reduced as in the configuration provided with the ribs 220A and 220B. be able to.

  Further, in the above embodiment, the configuration in which the distillate fluid discharge port 212a, the bottoms liquid discharge port 212b, and the raw material liquid supply port 212c are formed on the bottom surface 212 has been described as an example. However, one or more selected from the group of the distillate fluid outlet 212 a, the bottoms outlet 212 b, and the raw material liquid inlet 212 c may be formed on the side surface 216.

  INDUSTRIAL APPLICABILITY The present invention can be used in a distillation apparatus that separates a raw material liquid including low boiling point components and high boiling point components into a distillate and a bottoms.

100 Distillation device 112 1st raw material liquid supply pump (raw material liquid supply pump)
114 Raw material liquid storage container 116 Second raw material liquid supply pump (raw material liquid supply pump)
120 Distillation part 124 Collection part 126 Condensation part 132 Cum output storage container 140 Distilled fluid storage container 150 Decompression container 210 Main body 212 Bottom surface 212a Distilled fluid discharge port 212b Canned liquid discharge port 212c Raw material liquid supply port 220A Rib Rib of)
220B rib (second rib)

Claims (4)

A main body having a distillate fluid outlet, a bottom outlet, and a raw material liquid supply port provided between the distillate fluid outlet and the bottom outlet; and the raw material liquid in the main body One or more recovery units for heating between the supply port and the bottom outlet, and a concentration unit for cooling between the raw material liquid supply port and the distillate fluid outlet in the main body The distillation section,
A bottomed liquid storage container connected to the bottomed liquid discharge port and having a vent port;
A distillate fluid storage container connected to the distillate fluid outlet and having a vent port;
At least the distillation unit, the bottom fluid storage container, and the decompression container that accommodates the distillate fluid storage container;
A distillation apparatus comprising:   The distillation apparatus according to claim 1, further comprising: a raw material liquid supply pump that supplies the raw material liquid to the main body of the distillation unit. A raw material liquid storage container having a vent port provided in the decompression container;
The distillation apparatus according to claim 2, wherein the raw material liquid supply pump supplies the raw material liquid stored in the raw material liquid storage container to the raw material liquid supply port. The distillation section is
One or more first ribs which are erected from the bottom surface of the main body and extend from the raw material liquid supply port side to the can liquid discharge port side;
One or more second ribs which are erected from the bottom surface of the main body and extend from the distillate fluid outlet side to the raw material liquid inlet side;
The distillation apparatus according to any one of claims 1 to 3, comprising

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