JP3963612B2 - Distillation method and distillation apparatus used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distillation method and a distillation apparatus used therefor.
[0002]
[Prior art]
Conventionally, single-type distillers such as pot stills have been used for producing distilled liquors such as shochu, whiskey and brandy. However, the conventional pot still has a problem that the alcohol content of the obtained distilled liquor is low, and a problem that a large amount of steam, cooling water, etc. is used.
[0003]
Therefore, in order to solve such a problem, the present inventor has obtained a post-distilled solution (distillate obtained at the end of one distillation, furfural, diacetyl, Utilizing high-boiling components such as fatty acid esters) and initial distillate (the distillate obtained at the beginning of one distillation, including the soot from the last distillate) A simple shochu distillation apparatus is proposed (Japanese Patent Application No. 4-242765).
[0004]
As shown in FIG. 13, this shochu distillation apparatus is provided with a temperature rising tank (pre-distilled can) 52 in front of the distillation can 51. First, the temperature rising tank 52 has a rising temperature obtained by the previous distillation operation. The heated soot 54 is put, and then steam is blown into the temperature rising tank 52, and the distillate gas is taken out from the temperature rising tank 52 and sent to the distillation can 51. At this time, the alcohol content of the fed distillate gas is observed by the calibrator 53. Then, the temperature of the soot 55 in the distillation can 51 is raised with the distillate gas. When the calibrator 53 observes that the alcohol content of the distillate gas has reached 0 degrees, the distillate gas is stopped from being fed into the distillation can 51 and steam is sent. In the figure, 56 is a condenser, 57 is a product tank, and 58 is a first after distillate tank.
[0005]
[Problems to be solved by the invention]
In this case, the distillate gas sent from the distillation can 51 (from the temperature raising tank 52) can increase the alcohol concentration of the soot 55 in the distillation can 51, and the obtained distilled liquor can be obtained as compared with the conventional pot still. Increased alcohol content. In addition, the distillation time can be shortened, and the amount of steam, cooling water, etc. used can be reduced. However, recently, there has been a strong demand for the development of a distillation method and a distillation apparatus that can produce a product having a higher alcohol content at a low cost while using a single shochu distillation apparatus.
[0006]
The present invention has been made in view of such circumstances, and an object thereof is to provide a distillation method capable of producing a product having a high alcohol content at low cost and a distillation apparatus used therefor.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention introduces the after-distilled portion of the distilled gas obtained by distilling the koji in the distillation can into the awaiting tank that contains the koji (moromi) after fermentation, The temperature of the soot in the awaiting tank is raised at the rear distillation part, and after this temperature rise, the distillation waste liquid in the distillation can is discharged, and a part of the soot that is newly heated in the later distillation part is taken up as the soot. Removed from the waiting tank and supplied to the distillation can, and a part of the soot heated at the rear distillation portion was removed from the waiting tank and supplied to the pre-distilled can, and supplied to the pre-distilled can The soot is heated by a heating means, the distillate gas evaporated and vaporized by this heating is taken out from the pre-distilled can and introduced into the distiller, and the soot in the distiller is heated with the introduced distillate gas. The distillate gas evaporated and vaporized by this temperature rise is taken out of the distillation can and then introduced into the condenser to condense, liquid The distillation method made in this way is the first gist, and a distillation can, a waiting tank for storing the fermented rice cake, a pre-distilling can, and a first with an open / close valve connecting the waiting tank and the distillation can. A supply path, a second supply path with an on-off valve for connecting the waiting tank and the pre-distilled can, a heating means for heating the soot in the pre-distilled can, and the above-mentioned generated by heating of the heating means The above-mentioned distillation can generated by raising the temperature of the distillate gas introduced from the 1st introduction way with an on-off valve which introduces the distillate gas in a pre-distillation can into a distillation can, a condenser, and the above-mentioned 1st introduction way A distillation apparatus comprising a second introduction path with an on-off valve for introducing the distillate gas in the condenser into the condenser, and a branch path with an on-off valve that branches from the second introduction path and connects to the waiting tank. The gist of 2.
[0008]
That is, in the distillation method of the present invention, first, after-distilled portion taken out from the distiller at the end of distillation in the distiller is introduced into the awaiting tank, and the fermented residue in the awaiting tank is introduced into the awaited tank at the above-mentioned distillate portion. Raise the temperature. Then, after this temperature rise, the distillation waste liquid in the distillation can is discharged, and a part of the soot heated at the above-mentioned distillation portion is taken out from the waiting tank and supplied to the distillation can and the front distillation can. Next, the soot supplied to the pre-distilling can is heated by a heating means, and the distillate gas is taken out from the pre-distilling can and introduced into the distilling can. Then, the soot in the distillation can is heated with the introduced distillate gas, and the distillate gas is taken out from the distiller and then introduced into the condenser.
[0009]
Thus, in the distillation method of the present invention, after the distillation portion taken out from the distillation can is introduced into the waiting tank, the temperature after the fermentation of the fermentation in the waiting tank is increased at the following distillation portion, A part of the soot heated at the distilling portion is taken out from the waiting tank and supplied to the distillation can and the pre-stillation can. Therefore, it is possible to shorten the distillation time (temperature rise time) of the soot in the distillation can and the pre-distilled can, and increase the alcohol content of the soot and increase the alcohol content of the product obtained. In addition, since the trailing portion is introduced directly into the waiting tank, the facility cost of the waiting tank is lower than that of other heating means. Moreover, since the distillation time of soot is shortened, the amount of steam used is reduced accordingly. In addition, since the second distillation part is not re-distilled, the cooling water for cooling the second distillation part becomes unnecessary, and the total amount of cooling water used is greatly reduced. Therefore, the amount of groundwater used and the amount of electricity in the cooling tower can be reduced, and energy saving and labor saving can be realized. On the other hand, according to the distillation apparatus of the present invention, the distillation method of the present invention can be performed efficiently.
[0010]
In the present invention, when the distillate gas in the distillation can is introduced into the condenser, if the alcohol content of the soot in the pre-distillation can falls below a predetermined value, the soot in the pre-distillation can When the soot in the waiting tank is newly introduced, the alcohol content of the soot in the distillation can can be prevented from lowering, thereby increasing the alcohol content of the product obtained. Can be maintained.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 shows an embodiment of a distillation apparatus of the present invention. The distillation apparatus of this embodiment is a single distillation apparatus. In the figure, 1 is a cylindrical distillation can, and a part of the fermented rice cake A accommodated in the waiting tank 2 is provided with an outlet pipe 11 extending from the lower end of the waiting tank 2 and an opening / closing valve 12a. 1 is supplied via a supply pipe 12. 3 is a temperature raising tank (pre-distilled can), and a part of the fermented rice cake accommodated in the waiting tank 2 is supplied through the outlet pipe 11 and the second supply pipe 13 with the on-off valve 13a. . The distillation can 1 and the temperature raising tank 3 are connected via a first introduction pipe 14 with an on-off valve 14a, and the sample tester 5 detects the alcohol content in the distillate gas passing through the first introduction pipe 14. I am trying to do it.
[0013]
A condenser 4 has a distillate gas inlet (not shown) connected to a swan neck (second introduction path) 15 with an on-off valve 15 a extending from the top of the distillation can 1. Reference numeral 16 denotes a branch pipe with an on-off valve 16 a that branches from a portion of the swan neck 15 upstream of the on-off valve 15 a, and is connected to the waiting tank 2. In the figure, 4a is a cooling coil provided in the condenser 4, 6 is a product tank, 7 is a first rear distillation tank, 8 is a tank, 17a is a cooling water inlet pipe, 17b is a cooling water discharge valve, and 18 is a condenser. A distillate discharge pipe 19 for taking out the distillate condensed and liquefied in 4, and 19 a calibrator for detecting the alcohol content of the distillate passing through the distillate discharge pipe 18. Reference numerals 1a, 3a, 6a, and 7a are take-out valves, and 8a, 8b, 18a, and 18b are on-off valves.
[0014]
The distillation can 1 and the temperature raising tank 3 are provided with heat exchangers 9 and 10 having the same structure, respectively. Of these heat exchangers 9 and 10, the heat exchanger 9 provided in the distillation can 1 will be described. As shown in FIGS. 2 and 3, the heat exchanger 9 includes six cylindrical main bodies 21 disposed concentrically with the distillation can 1 near the bottom in the distillation can 1, and the distillation One annular steam supply pipe 22 disposed on the outer periphery of the can 1, and one annular steam discharge disposed on the lower side of the steam supply pipe 22 on the outer periphery of the distillation can 1. The main body 21 includes a pipe 23 and a boiler (not shown). The main bodies 21 are arranged vertically and at regular intervals so that the axial direction of the main body 21 is along the axial direction of the distillation can 1. It is arranged. Both the heat exchangers 9 and 10 can increase the heating area and shorten the distillation time (the heating method may be direct steam heating).
[0015]
Each of the main bodies 21 has a double wall structure (an annular space is formed in the inner wall), and the steam introduction pipe 25 faces the can wall 1a of the distillation can 1 from the top. And a steam discharge pipe 26 extends from the bottom of the distillation can 1 toward the can wall 1a. Each of the steam introduction pipes 25 protrudes out of the can wall 1a through a through-round hole 1b formed in the can wall 1a, and a threaded portion 25a is formed on the outer peripheral surface of the protruding portion. (See FIG. 4). On the other hand, a nut plate 27 is bolted to the outer peripheral surface portion of the can wall 1a corresponding to each steam introduction pipe 25, and the axial direction of each steam introduction pipe 25 is located at the center of each nut plate 27. A through hole 27a is formed so as to extend along the line. And the thread part 27b which meshes with the thread part 25a of each said steam introduction pipe | tube 25 is formed in the internal peripheral surface of each of these through-holes 27a. Further, a steam outlet 22 a is formed in the portion of the steam supply pipe 22 corresponding to the through hole 27 a of each nut plate 27, and the branch pipe 28 fixed to the nut plate 27 with a bolt 33 is used to The through hole 27a communicates with the steam outlet 22a.
[0016]
Each steam discharge pipe 26 communicates with the steam discharge pipe 23 in the same manner as the steam introduction pipe 25. That is, the steam discharge pipe 26 protrudes out of the can wall 1a through the through-round hole 1c formed in the can wall 1a, and a threaded portion 26a is formed on the outer peripheral surface of the protruding portion. (See FIG. 4). On the other hand, a nut plate 29 is fixed to the outer peripheral surface portion of the can wall 1a corresponding to each steam discharge pipe 26 with a bolt 32, and the axial direction of each steam discharge pipe 26 is located at the center of each nut plate 29. A through-hole 29a is formed so as to extend along the line. And the thread part 29b which meshes with the thread part 26a of each said steam exhaust pipe 26 is formed in the internal peripheral surface of each of these through-holes 29a. Further, a steam inlet 23 a is formed in a portion of the steam discharge pipe 23 corresponding to the through hole 29 a of each nut plate 29, and the branch pipe 30 secured to the nut plate 29 with a bolt 33 is used to The through hole 29a communicates with the steam inlet 23a. In FIG. 4, 34 is a packing, and 35 is a washer fixed to the can wall 1a.
[0017]
When the heat exchanger 9 is assembled, the steam introduction pipe 25 and the steam discharge pipe 26 of each main body 21 are pulled out of the can wall 1a through the through-round holes 1b and 1c of the can wall 1a, respectively, and then the packing 34 With nuts 27 and 29 fitted to the ends of the steam introduction pipe 25 and the steam discharge pipe 26, and then the nut plates 27 and 29 are rotated so that the threaded portions of the nut plates 27 and 29 are engaged. 27a and 29a, the steam introduction pipe 25, and the screw portions 25a and 26a of the steam discharge pipe 26 are joined together, and then the nut plates 27 and 29 are fixed to the washer 35 of the can wall 1a with the bolt 32. After that, the branch pipes 28 and 30 are fixed to the outside of the nut plates 27 and 29 by bolts 33.
[0018]
When the steam is introduced from the boiler into the steam supply pipe 22, the steam flows through the branch pipes 28 and the steam introduction pipes 25 into an annular space formed on the outer peripheral wall of each main body 21, After heating B (see FIG. 1), it is introduced into the steam discharge pipe 23 via each steam discharge pipe 26 and each branch pipe 30, and returns to the boiler. And by the heat exchange by this heat exchanger 9, the soot B in the distillation can 1 rises in the internal space 21a of each main body 21 and convects, and is quickly heated to the boiling point temperature of alcohol.
[0019]
On the other hand, the heat exchanger 10 provided in the temperature raising tank 3 has the same structure as the heat exchanger 9 as described above, and the assembly procedure for the temperature raising tank 3 and the operation in the temperature raising tank 3 are as follows. Is the same. Therefore, the description is omitted.
[0020]
In the above configuration, product alcohol such as shochu and whiskey can be produced as follows. That is, first, a predetermined bag A is stored in the waiting tank 2. Then, at the end of distillation in the distillation can 1, the supply of the distilled alcohol vapor from the temperature raising tank 3 is stopped (this stop is performed by closing the on-off valve 14a of the first introduction pipe 14). ) And steam is passed through the heat exchanger 9 to heat the distillation can 1. At the same time, the open / close valve 15a of the swan neck 15 is closed and the open / close valve 16a of the branch pipe 16 is opened. As a result, the post-alcohol vapor (distillate portion) from the distillation can 1 is introduced into the waiting tank 2 through the swan neck 15 and the branch pipe 16, and the soot in the waiting tank 2 is introduced by the introduced post-alcohol vapor. A is heated.
[0021]
Next, when the alcohol content of the bowl B (see FIG. 1) in the distillation can 1 falls to a predetermined value (for example, 0% alcohol content), this is detected by a sample tester (not shown) and the on-off valve 15a is opened. Then, the on-off valve 16a is closed. Next, the soot B in the distillation can 1 is discharged, and a part of the soot A is supplied from the waiting tank 3 to the distilling can 1 and the temperature raising tank 3. Next, steam is passed through the heat exchanger 10 of the temperature rising tank 3 to heat the basket C (see FIG. 1) in the temperature rising tank 3. As a result, distilled alcohol vapor is generated in the temperature raising tank 3 and introduced into the distillation can 1 through the first introduction pipe 14 (the on-off valve 14a is opened). As a result, the temperature of the soot B in the distillation can 1 rises, and the distilled alcohol vapor is introduced into the condenser 4 to obtain product alcohol.
[0022]
Next, when the alcohol content of the basket C in the temperature raising tank 3 decreases to the predetermined value, this is discharged and a part of the basket A is supplied from the waiting tank 2 to the temperature raising tank 3. Then, again, the heat exchanger 10 raises the temperature of the soot C in the temperature raising tank 3, and the distilled alcohol vapor generated in the temperature raising tank 3 is introduced into the distillation can 1. As a result, the temperature of the soot B in the distillation can 1 rises, and the distilled alcohol vapor is introduced into the condenser 4 to obtain product alcohol.
[0023]
Further, when the alcohol content of the basket C in the temperature raising tank 3 decreases to the predetermined value again, this is discharged, and a part of the basket A is supplied from the waiting tank 2 to the temperature raising tank 3, and the same as above. Then, the distilled alcohol vapor produced in the distillation can 1 is introduced into the condenser 4 to obtain product alcohol. On the other hand, since the inside of the waiting tank 2 is emptied by the supply, the waiting tank A is accommodated in the waiting tank 2.
[0024]
When the alcohol content of the basket C in the temperature raising tank 3 again reaches the predetermined value, this is discharged and the supply of the distilled alcohol vapor to the distillation can 1 is stopped. This stop is performed by closing the on-off valve 14a of the first introduction pipe 14. After this stop, the same operation as described above is repeated. The product alcohol may be obtained by one distillation.
[0025]
As described above, in this embodiment, since the distilled alcohol vapor is supplied directly to the waiting tank 2 to raise the temperature of the straw A in the waiting tank 2, the distillation time (temperature raising time of the straw) is increased. ) Is shortened, and the alcohol content of 醪 B of the distillation can 1 is increased, and the alcohol content of the distilled alcohol vapor is also increased. Moreover, the equipment cost of the waiting tank 2 may be small. Furthermore, since the residual alcohol vapor is not rerun, the amount of cooling water used is greatly reduced, and the amount of electricity in the groundwater or cooling tower is reduced, resulting in energy saving and labor saving. Further, since the alcohol content of the distilled alcohol vapor is increased, the amount of the distilled alcohol vapor from the distillation can 1 can be reduced, energy saving can be achieved, and the storage tank for shochu can be made smaller. Furthermore, since no steam is used for distillation in the temperature raising tank 3, the amount of steam used is also greatly reduced.
[0026]
【Example】
Next, examples will be described. In this embodiment, first, a waiting tank 2 is stored with 10.5% alcohol content (hereinafter abbreviated as “ALC”), a volume of 21900 l (liter), and a temperature of 20 ° C. Moreover, when the supply of the distilled alcohol vapor from the heating tank 3 is stopped, the soot B in the distillation can 1 is ALC 7.5%, volume 11000 l, temperature 94 ° C. (see FIG. 5). On the other hand, after the stop, the temperature raising tank 3 is in an empty state.
[0027]
Then, after a predetermined time has elapsed due to the supply of steam to the heat exchanger 9 and the introduction of the post-alcohol vapor to the waiting tank 2, the waiting tank A has an ALC of 12.5%, a volume of 25000 l, and a temperature of 80 ° C. Thus, cocoon B of distillation can 1 is ALC 0%, volume 7900 l, temperature 100 ° C. (see FIG. 6). At that time, the soot B in the distillation can 1 is discharged, and 10,000 l of soot A is supplied to the distillation can 1 from the waiting tank 2 and 5000 l of soot A is supplied to the heating tank 3 (see FIG. 7). .
[0028]
Next, steam is passed through the heat exchanger 10 of the temperature raising tank 3 to raise the temperature of the soot C in the temperature raising tank 3. As a result, distilled alcohol vapor is generated in the temperature raising tank 3, and ALC 37.8%, 1650 l, 100 ° C. distilled alcohol vapor is introduced into the distillation can 1 while a predetermined time elapses. The soot C in the temperature raising tank 3 becomes ALC 0%, 3350 l, 100 ° C. Moreover, the distillation B in the distillation can 1 is heated by the distilled alcohol vapor, and the distilled alcohol vapor is introduced into the condenser 4 to obtain a distilled alcohol liquid of ALC 63.3% and 1020 l. At this time, the soot B in the distillation can 1 becomes ALC 11.5%, 10630 l, 92 ° C. (see FIG. 8).
[0029]
Next, when the soot C in the temperature raising tank 3 becomes ALC 0%, this is discharged, and 5000 l of soot A is supplied from the waiting tank 2 to the temperature raising tank 3 (see FIG. 9). And again, the soot C in the temperature raising tank 3 is heated by the steam passing through the heat exchanger 10. As a result, distilled alcohol vapor is generated in the temperature raising tank 3, and ALC 37.8%, 1650 l, 100 ° C. is introduced into the distillation can 1. And by the said distillation alcohol vapor, the soot C in the temperature rising tank 3 will be ALC0%, 3350l, and 100 degreeC. Further, the temperature of the soot B in the distillation can 1 is raised, and a distilled alcohol vapor is introduced into the condenser 4 to obtain a distilled alcohol liquid of ALC 59.5% and 1450 l. At this time, the soot B in the distillation can 1 becomes ALC 9.1%, 10830 l, 94 ° C. (see FIG. 10).
[0030]
Further, when the soot C in the temperature raising tank 3 becomes ALC 0%, this is discharged and 5000 l of soot A is supplied from the waiting tank 2 to the temperature raising tank 3 (see FIG. 11). Thereby, the inside of the waiting tank 2 becomes empty. Further, the temperature of the soot C in the temperature raising tank 3 is raised again by the steam passing through the heat exchanger 10. As a result, distilled alcohol vapor is generated in the temperature raising tank 3, and ALC 37.8%, 1650 l, 100 ° C. is introduced into the distillation can 1. And by the said distillation alcohol vapor, the soot C in the temperature rising tank 3 will be ALC0%, 3350l, and 100 degreeC. In addition, the temperature of the soot B in the distillation can 1 is raised, and distilled alcohol vapor is introduced into the condenser 4 to obtain a distilled alcohol liquid of ALC 55.5% and 1350 l. At this time, the soot B in the distillation can 1 becomes ALC 7.7%, 11130 l, 94 ° C. (see FIG. 12).
[0031]
And when the inside of the waiting tank 2 becomes empty, ALC10.5%, 21900l, and the normal temperature soot are accommodated again (refer FIG. 1). By performing such distillation once or a plurality of times, a desired product alcohol can be obtained.
[0032]
In the above embodiment, the soot A is supplied from the waiting tank 2 to the temperature raising tank 3 three times. However, the present invention is not limited to this, and may be once or twice, or may be four times or more. Good. Further, the pressure of the distillation can 1 may be normal pressure or reduced pressure. The heating method may be either a direct steam method or an indirect heating method.
[0033]
【The invention's effect】
As described above, according to the distillation method of the present invention, the after-distilled portion taken out from the distillation can is introduced into the waiting tank, and the temperature of the fermented koji in the waiting tank is increased at this after-running portion. A part of the soot that has been heated at the above-mentioned fraction is taken out from the waiting tank and supplied to the distillation can and the pre-distillation can. Therefore, it is possible to shorten the distillation time (temperature raising time) of the soot in the distillation can and the pre-distilled can, and increase the alcohol content of the soot and increase the alcohol content of the resulting product. In addition, since the trailing portion is introduced directly into the waiting tank, the facility cost of the waiting tank is lower than that of other heating means. Moreover, since the distillation time of soot is shortened, the amount of steam used is reduced accordingly. In addition, since the rear distillation portion is not re-distilled, the cooling water for cooling the rear distillation portion becomes unnecessary, and the total amount of cooling water used is greatly reduced. Therefore, the amount of groundwater used and the amount of electricity in the cooling tower can be reduced, and energy saving and labor saving can be realized. On the other hand, according to the distillation apparatus of the present invention, the distillation method of the present invention can be performed efficiently.
[0034]
In the present invention, when the distillate gas in the distillation can is introduced into the condenser, if the alcohol content of the soot in the pre-distillation can falls below a predetermined value, the soot in the pre-distillation can When the soot in the above-mentioned tank is newly introduced, it is possible to prevent the alcohol content of the soot in the distillation can from being lowered, thereby increasing the alcohol content of the resulting product. Can be maintained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an embodiment of a distillation apparatus of the present invention.
FIG. 2 is an explanatory diagram of a heat exchanger.
FIG. 3 is a cross-sectional view of a main part of the heat exchanger.
FIG. 4 is a cross-sectional view of a main part of the heat exchanger.
FIG. 5 is an explanatory diagram showing the operation of the distillation apparatus.
FIG. 6 is an explanatory diagram showing the operation of the distillation apparatus.
FIG. 7 is an explanatory diagram showing the operation of the distillation apparatus.
FIG. 8 is an explanatory diagram showing the operation of the distillation apparatus.
FIG. 9 is an explanatory diagram showing the operation of the distillation apparatus.
FIG. 10 is an explanatory diagram showing the operation of the distillation apparatus.
FIG. 11 is an explanatory view showing the operation of the distillation apparatus.
FIG. 12 is an explanatory diagram showing the operation of the distillation apparatus.
FIG. 13 is an explanatory diagram of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Distillation can 2 Waiting tank 3 Temperature rising tank 4 Condenser 9 Heat exchanger 12 1st supply pipe 12a, 13a, 14a, 15a, 16a On-off valve 13 2nd supply pipe 14 1st introduction pipe 15 Swan neck 16 Branch pipe

Claims (3)

  The after-distilled portion of the distillate gas obtained by distilling the soot in the distillation can is introduced into the awaiting tank that contains the fermented soot (moromi). And after this temperature rise, the distillation waste liquid in the distillation can is discharged, a part of the soot that has been heated at the rear distillation part is removed from the waiting tank and supplied to the distillation can, and Then, a part of the soot heated at the above-mentioned distillation part is taken out from the above-mentioned waiting tank and supplied to the pre-distilled can, and the soot supplied to the pre-distilled can is heated by heating means, and evaporated by this heating. The vaporized distillate gas is taken out from the above-mentioned pre-distilled can and introduced into the distiller, the soot in the distiller is heated with the introduced distillate gas, and the distillate evaporated and vaporized by this temperature rise. Distillation characterized in that gas is taken out of the distillation can and then introduced into a condenser to condense and liquefy. Law. When the distillate gas in the distillation can is introduced into the condenser, if the alcohol content of the soot in the pre-distillation can falls below a predetermined value, the soot in the pre-distillation can is discharged, 2. The distillation method according to claim 1, wherein the straw in the waiting tank is newly introduced.   A distillation tank, a waiting tank for storing the fermented koji, a pre-distilled can, a first supply path with an on-off valve connecting the waiting tank and the distilling can, the waiting tank and the pre-distilling can A distilling gas in the pre-distilled can produced by heating the heating means in the pre-distilling can, heating means for heating the soot in the pre-distilled can in the distilling can A first introduction path with an opening / closing valve to be introduced, a condenser, and an opening / closing valve for introducing the distillate gas in the distillation can generated by raising the temperature of the distillate gas introduced from the first introduction path to the condenser A distillation apparatus, comprising: a second introduction path with an opening and a branch path with an on-off valve that branches from the second introduction path and connects to the waiting tank.

Images