JP4234692B2 - Method for extracting essential oil from citrus fruits and vacuum distilled essential oil extraction device - Google Patents

Description

  The present invention relates to a method for extracting essential oil from citrus fruits and a vacuum distilled essential oil extraction device for extracting citrus essential oil from a residue remaining after squeezing fruit juice from citrus fruits.

  Conventionally, fruit juice of citrus fruits such as persimmons has been widely used for soft drinks, ponzu and the like.

  Here, the citrus peel has oil vesicles containing essential oil in the outer flavedo, and the essential oil contains aromatic components such as limonene. The aroma component is contained a lot in the skin, and only about 1% of the fruit juice is obtained, but it has a strong aroma. Thus, the essential oil containing the aromatic component which can be extracted only slightly from the whole is very valuable.

  Therefore, as a method for extracting essential oil from the citrus peel, a so-called pressing method is known, for example, as in Patent Document 1. In this method, pressure is applied to the fruit to squeeze out the fruit juice, remove residues such as seeds and skins, perform centrifugation on the squeezed fruit juice, and extract essential oil.

  As another method, a so-called solvent extraction method is known as in Patent Document 2. This is a method of immersing the peel in a certain organic solvent to obtain an aqueous extract containing essential oil, and then removing the solvent from the aqueous extract to separate the essential oil.

Furthermore, as in Patent Document 3, sifted juices such as fruit juices and fibers extracted from citrus fruits, and after separating the fruit juice, what remains on the sieve is used as a vibration sieve residue, and this is used as a vacuum distillation method. It is known how to obtain essential oils.
JP 2003-183690 A JP-A-5-276881 JP 2004-18737 A

  However, the pressing method as in Patent Document 1 has a problem that the residue after squeezing the fruit juice must be treated as industrial waste. In addition, in the solvent extraction method such as Patent Document 2 described above, it is difficult to completely separate the organic solvent from the essential oil, and even a small amount of this organic solvent causes a decrease in human immune function or allergy, There was a problem with safety. Furthermore, in the method as described in Patent Document 3, since essential oil is extracted using a vibrating sieve residue as a raw material, the skin containing a large amount of essential oil is not used, and only a small amount of essential oil can be extracted. The residue had to be treated as industrial waste.

  The present invention has been made in view of the above points, and the object of the present invention is to efficiently extract safer essential oil from the residue remaining after squeezing fruit juice from citrus fruits and treat it as industrial waste. It is to effectively use the remaining residue as a resource.

  In order to achieve the above object, in the present invention, a residue remaining after squeezing fruit juice from citrus fruits is heated under reduced pressure while pulverizing, and water and essential oil are distilled to obtain essential oils from citrus fruits.

  Specifically, the first invention is directed to a method for extracting essential oils from citrus fruits, pressing the citrus fruits to squeeze the juice, and separating the juice and the residue, It is stirred while being pulverized by a stirring blade and heated under reduced pressure to vaporize moisture and essential oil from the residue, a condensation step for cooling the vaporized moisture and essential oil to obtain a condensed liquid, and an essential oil from the condensed liquid. And a separation step for separating the components.

  According to the above configuration, the residue containing the fruit peel separated from the fruit juice in the pressing process is crushed by the blade-shaped stirring blade in the vacuum distillation process, so that the oil vesicles of the fruit peel are crushed and the essential oil pops out and is stirred. While being heated, moisture and essential oil are vaporized from the entire residue. Further, the residue is heated under reduced pressure to lower the boiling points of moisture and essential oil, and moisture and essential oil are vaporized at a temperature lower than usual. The vaporized moisture and essential oil are cooled to become a condensed liquid of moisture and essential oil in the condensation step. Finally, in the separation step, the condensed liquid is separated into water and essential oil, whereby essential oil is extracted from citrus fruits.

  In 2nd invention, it is set as the structure provided with the fermentation process which ferments the to-be-dried body which remains after vaporizing a water | moisture content and essential oil from a residue in a vacuum distillation process, and uses it as an organic fertilizer.

  According to said structure, residues, such as the peel which had to be processed as industrial waste, become a raw material which extracts essential oil, and are utilized as organic fertilizer by fermenting the to-be-dried body.

  The third invention is directed to a vacuum distilled essential oil extraction device that extracts citrus essential oil from a residue remaining after squeezing fruit juice from citrus.

  And the said vacuum distillation essential oil extraction apparatus is a sealed state provided between the inlet port which introduce | transduces a residue, the extraction port which takes out the residue after a process, and the 1st suction port, and the outer periphery of a casing A jacket portion, heating means for circulating oil heated in the jacket portion, raising the temperature in the casing, and vaporizing moisture and essential oil from the residue, and vaporized moisture and essential oil sucked from the first suction port of the casing A condenser that cools and condenses and discharges the condensate, and is provided below the condenser to store the condensate from the condenser, and a sealed reservoir having a second suction port, and a reservoir Pressure reducing means for sucking air from the second suction port to decompress the inside of the casing, the condenser and the reservoir, and rotating means for rotating the drive shaft inserted in a sealed manner through a shaft insertion hole provided in the casing; Be equipped , The drive shaft, and be provided with a blade-shaped agitating blades for stirring the residue was triturated in the casing.

  According to said structure, the residue comprised after the fruit skin, a seed, etc. which remain | survives after squeezing fruit juice from citrus fruits is first thrown into a casing from an inlet. And the inside of the casing, the condenser, and the reservoir that are in a sealed state is in a depressurized state when air is sucked by the depressurizing means from the second suction port of the reservoir. Furthermore, by circulating the heated oil in the jacket portion, the casing is heated from the entire outer periphery, and the internal temperature rises.

  By rotating the drive shaft by the rotating means in the above state, the blade-shaped stirring blade provided on the drive shaft rotates, and the residue is stirred while being crushed in the casing. At this time, since the inside of the casing is in a reduced pressure state, the boiling points of moisture and essential oil are lowered, and moisture and essential oil are vaporized from the residue at a temperature lower than usual. Here, the essential oil is abundant in the oil vesicles of the peel that make up the residue. It will vaporize in the state. Then, the residue is heated while being stirred by the stirring blade, whereby moisture and essential oil are vaporized from the residue in the deep portion, the vaporization is promoted, and the residue is pulverized finely by the blade-shaped stirring blade. By crushing and increasing the individual surface area, vaporization of moisture and essential oil is further promoted.

  The vaporized moisture and essential oil are sucked from the first suction port of the casing together with the air in the casing, and pass through the condenser. In the process of passing through this condenser, moisture and essential oil are condensed by cooling to become a condensate, and this condensate falls from the condenser to the reservoir by gravity. In this way, the condensed moisture and essential oil are stored in the reservoir. And this essential liquid is obtained by taking out this condensed liquid and isolate | separating a water | moisture content and essential oil with a well-known centrifuge etc. Finally, after moisture and essential oil are vaporized from the residue, the material to be dried remaining in the casing is taken out from the outlet of the casing.

  As described above, according to the present invention, since essential oil is distilled together with moisture from a residue containing a fruit skin that is rich in essential oil, a condensate rich in essential oil is obtained, and the essential oil is efficiently extracted. Can do. In addition, since the stirring blade is shaped like a blade and stirred while pulverizing the residue, the oil can be crushed by the stirring blade and the essential oil can be taken out from the oil sac and the residue is finely crushed to increase its surface area. Thus, vaporization of moisture and essential oil is promoted, and the essential oil can be extracted efficiently. In addition, since the residue is heated while being stirred, moisture and essential oil can be vaporized from the residue in the deep portion, the vaporization thereof is promoted, and the essential oil can be extracted efficiently. Furthermore, since essential oil is extracted without using additives, such as an organic solvent, safe essential oil can be extracted.

  According to the said 2nd invention, the to-be-dried body which remains after vaporizing a water | moisture content and essential oil from a residue is fermented, and it utilizes as an organic fertilizer. For this reason, the residue comprised with the peel etc. which were conventionally processed as industrial waste can be effectively utilized not only as a raw material which extracts essential oil but as an organic fertilizer.

  According to the third aspect of the present invention, the heated oil is circulated through the jacket portion by the heating means, so that the temperature in the casing is increased uniformly. For this reason, the residue which is a solid substance in the casing can be heated from the entire outer periphery of the casing, the vaporization of moisture and essential oil can be promoted, and the essential oil with stable quality can be extracted efficiently. .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a vacuum distillation essential oil extraction apparatus 1 according to an embodiment of the present invention. In this vacuum distillation essential oil extraction apparatus 1, a residue remaining after squeezing fruit juice from citrus fruits such as strawberries, lemons, grapefruits, etc. A drying apparatus 3 to be dried, a condenser 85 that cools and condenses moisture and essential oil evaporated from the residue, and a reservoir 90 that stores the condensed condensate are provided on the base 2 respectively. ing.

  In the following description, the right side in FIG. 2 is the front side of the vacuum distilled essential oil extraction apparatus 1, the left side is the rear side, the upper side is the left side, and the lower side is the right side.

  As shown by a broken line in FIG. 1, the drying device 3 includes a substantially cylindrical and sealed casing 6. In the rear portion of the upper wall 7 of the casing 6, a charging port 8 into which a residue is charged is opened. A charging pipe 9 that curves backward from the charging port 8 extends upward, and a hopper portion 10 that extends toward the opening is provided at the tip of the charging pipe 9. The hopper portion 10 is provided with a closing lid 11 that closes its opening in a sealed manner.

  A first suction port 15 is provided in the front portion of the upper wall 7 of the casing 6. A first suction pipe 16 extends upward from the first suction port 15.

  As shown in FIG. 2, the upper wall 7 of the casing 6 is provided with two viewing windows 17 for observing the state of the residue in the casing.

  As shown in FIG. 3, an outlet 20 for taking out the residue after processing is opened at the rear end of the lower portion of the side wall 12 of the casing 6. The outlet 20 is provided with a sealing lid 21 that opens in a single manner around a left hinge (not shown), and two handle portions 22 are provided at the right end of the sealing lid 21. When the vacuum distillation essential oil extraction apparatus 1 is operated, the sealing lid 21 is tightened with respect to the outlet 20 by the rotation of the handle portion 22, and the outlet 20 is closed in a sealed state.

  As shown in FIG. 6, a shaft insertion hole 30 is provided in the center of the upper wall 7 of the casing 6. An upper drive shaft 31 is hermetically inserted into the shaft insertion hole 30, and a storage tower 32 for storing the upper drive shaft 31 is disposed above the shaft insertion hole 30. On the upper side of the storage tower 32, an electric motor 33 is disposed as a rotating means for rotating the upper drive shaft 31. A bearing 34 is accommodated in the upper portion of the storage tower 32, and the upper drive shaft 31 is rotatably supported by the bearing 34.

  FIG. 7 is an exploded view of the insertion portion of the upper drive shaft 31 into the shaft insertion hole 30. A disc-shaped upper insertion portion 36 is fixed to the upper drive shaft 31 around the upper drive shaft 31. A plurality of bolt insertion holes 37 are formed in the upper insertion portion 36, and a protrusion 38 protruding downward along the upper drive shaft 31 is provided on the radially inner side.

  A cylindrical lower insertion portion 40 is fixed to the shaft insertion hole 30, and a seal accommodation portion 40 a is recessed at the upper center of the lower insertion portion 40. A female screw portion 40b is provided at a position corresponding to the bolt insertion hole 37 of the upper insertion portion 36 on the wall portion constituting the seal housing portion 40a. Further, an insertion port 41 into which the upper drive shaft 31 is rotatably inserted is opened at the lower center of the seal housing portion 40a.

  And the upper side drive shaft 31 is inserted in the insertion port 41 of the said lower side insertion part 40, and the internal thread part 40b and the bolt insertion hole 37 are aligned. Then, the upper insertion portion 36 is fastened to the lower insertion portion 40 by inserting the bolt 43 from above the bolt insertion hole 37 and screwing it into the female screw portion 40 b. A seal member 42 made of four layers of silicon is fitted into the seal accommodating portion 40a of the lower insertion portion 40, and the upper insertion portion 36 is pressed while the protruding portion 38 of the upper insertion portion 36 holds the seal member 42 from above. Is fastened to the lower insertion portion 40. As a result, the space between the lower insertion portion 40 and the upper drive shaft 31 is hermetically closed by the seal member 42 to the extent that the upper drive shaft 31 is allowed to rotate, and the upper drive shaft 31 is inserted through the shaft. The hole 30 is inserted in a sealed manner.

  As shown in FIG. 6, a lower drive shaft 51 is integrally connected to the lower end of the upper drive shaft 31 inside the casing 6 by a connecting member 50. Below the lower drive shaft 51, a two-stage stirring blade 54 having a circular blade 52 and a stirring plate 53 is integrally provided for rotation. The stirring blade 54 is rotated clockwise in FIG.

  Two boss parts 60 are fixed to the lower part of the lower drive shaft 51 so as to rotate together with the lower drive shaft 51. Each of these boss portions 60 is provided integrally with a rotation at a position where a pair of plate-like stirring plates 53 face each other. The stirring plate 53 provided on the upper boss portion 60 is inclined downward so as to go in the rotation direction of the stirring blade 54. The stirring plate 53 provided in the lower boss portion 60 is inclined downward so that the upper part is vertical and the lower part is directed in the direction of rotation of the stirring blade 54. The lower part further includes two slide plates 61 that slide along this inclination, and the lower ends thereof are in contact with the bottom wall of the casing 6. Each boss portion 60 is provided with two rotating shafts 62 so as to be rotatable with respect to the boss portion 60 via a bearing (not shown) so as to be orthogonal to the pair of stirring plates 53. The center of a plurality of disk-shaped circular blades 52 is integrally attached to the rotary shaft 62 at regular intervals over the entire axial direction. The outer periphery of the circular blade 52 has a sharp blade shape, and the upper circular blade 52 and the lower circular blade 52 are attached so as to alternate. A pinion 63 is provided at the tip of each rotating shaft 62. On the other hand, inside the casing 6, two racks 64 are provided at positions corresponding to the pinion 63 on the entire circumference except for a portion where the outlet 20 of the casing 6 is opened. The rack 64 is mounted so that the pinion 63 of the rotating shaft 62 is engaged, and the rotating shaft 62 is rotated around the lower driving shaft 51 by the lower driving shaft 51 rotated by the electric motor 33, and the pinion The circular blade 52 rotates around the rotation shaft 62 by moving the rack 64 by the rack 63.

  A sealed jacket portion 70 is provided on the outer periphery of the casing 6. The jacket portion 70 is configured between the casing 6 and an outer wall 71 that covers the side wall 12 and the bottom wall of the casing 6 with a predetermined interval. The jacket portion 70 is filled with oil. A heat insulating material 72 for keeping heat in the casing 6 is wound around the entire periphery of the outer wall 71.

  As shown in FIGS. 2 and 3, heating means 75 is disposed on the left side of the drying device 3. The heating means 75 is provided with a hydraulic pump 76 for causing the oil to flow in the lower part thereof. A fluid pipe 77 extending upward is connected to the hydraulic pump 76. A heater 78 that heats oil is provided inside the flow pipe 77, and the heater 78 heats the oil that flows in the flow pipe 77. An oil discharge pipe 79 extends from the lower part of the flow pipe 77, is connected to the lower left end of the outer wall 71 of the drying device 3, and communicates with the inside of the jacket part 70. An oil inflow pipe 80 extends from the upper part of the flow pipe 77, and a tank portion 81 for storing oil whose volume has been increased by heating is provided at the upper end of the oil inflow pipe 80. Further, the oil inflow pipe 80 is connected to the upper left end of the outer wall 71 of the drying device 3 and communicates with the inside of the jacket portion 70.

  As shown in FIG. 1, the rear end of the box-shaped condenser 85 is connected to the upper end of the first suction pipe 16 extending from the first suction port 15 of the casing 6. The condenser 85 is disposed so as to be inclined downward toward the front, and the center of both side walls is fixed to the upper end of the support 86 extending from the pedestal 2 so that the condenser 85 is supported by the pedestal 2. Has been. As shown also in FIG. 4, cooling water supply pipes 87 for supplying cold water to a plurality of cooling tubes (not shown) in the condenser 85 are connected to the front ends of both side walls of the condenser 85. These cooling water supply pipes 87 are integrated into one below the condenser 85 and extend to the left rear end of the vacuum distilled essential oil extraction apparatus 1 as shown in FIG. Further, a cooling water drain pipe 88 through which water supplied from the cooling water supply pipe 87 to the cooling tube is drained is connected to the upper rear end of the condenser 85. This cooling water drain pipe 88 extends to the left rear end of the vacuum distilled essential oil extraction device 1, similarly to the cooling water supply pipe 87.

  A plurality of air passages (not shown) passing between the cooling tubes are provided inside the condenser 85 and connected to the first suction pipe 16 extending from the casing 6.

  As shown in FIG. 1, a reservoir 90 is disposed on the base 2 below the condenser 85. The upper front end of the reservoir 90 and the lower front end of the condenser 85 are connected by a connecting pipe 91. The upper end of the connecting pipe 91 is connected to the front end of the air passage in the condenser 85.

  The front and rear ends of the reservoir 90 are hermetically closed by a storage lid 92. As shown in FIG. 4, a drain pipe 93 for taking out the stored condensate is connected to the lower center of the reservoir 90, and this drain pipe 93 is normally closed. A second suction port 94 is provided at the upper center of the reservoir 90. A second suction pipe 95 extends from the second suction port 94 and continues in a sealed manner with a vacuum pump 96 (shown in FIG. 2) which is a decompression unit disposed on the left side of the reservoir 90. .

  Thus, in a state where the closing lid 11 of the charging port 8 and the sealing lid 21 of the outlet 20 provided in the casing 6 of the drying device 3 are closed, the casing 6, the first suction pipe 16, the air passage of the condenser 85, The connecting pipe 91 and the reservoir 90 are continuous and kept sealed. When the vacuum pump 96 sucks air from the second suction port 94 of the reservoir 90, the air is sequentially sucked from the reservoir 90, the air passage of the condenser 85 and the inside of the casing 6. As shown in FIG. 2, a substantially cylindrical exhaust tower 100 is disposed on the left side of the vacuum pump 96. The exhaust tower 100 and the vacuum pump 96 are hermetically connected by a connecting pipe 101. From the upper part of the exhaust tower 100, an exhaust pipe 102 that exhausts air sucked by the vacuum pump 96 extends upward.

  A control panel 103 is disposed at the front left end of the vacuum distillation essential oil extraction apparatus 1. The control panel 103 controls the operation of the vacuum pump 96 so that the inside of the casing 6 of the drying device 3 is at a constant pressure, and the heater 78 and the hydraulic pump so that the inside of the casing 6 is at a constant temperature. The operation of 76 is controlled.

-Driving action-
Next, the method of extracting the citrus essential oil from the residue remaining after operating the said vacuum distillation essential oil extraction apparatus 1 and squeezing fruit juice from citrus will be demonstrated in detail.

  First, a citrus fruit is squeezed to squeeze out the fruit juice to obtain a residue composed of the remaining skin, seeds, and the like.

  Then, this residue is charged from the charging port 8 of the casing 6 of the drying apparatus 3 until the stirring blade 54 is hidden, and the charging lid 11 of the charging port 8 is closed. At this time, the outlet 20 of the casing 6 is closed by the sealing lid 21, and the inside of the casing 6 is in a sealed state.

  Next, the vacuum pump 96 is operated to suck air from the second suction port 94 of the reservoir 90. The sucked air passes through the second suction pipe 95 and further passes through the communication pipe 101 and is discharged from the exhaust pipe 102 of the exhaust tower 100. Then, when air is sucked in by the vacuum pump 96, the reservoir 90, the condenser 85, and the casing 6 are sequentially depressurized. In this case, the operation of the vacuum pump 96 is controlled by the control panel 103 so that the inside of the casing 6 is maintained at about 0.09 atmospheric pressure (about 9117 Pa).

  Then, the oil in the flow pipe 77 is heated by the heater 78, the hydraulic pump 76 is operated, and the heated oil flows into the jacket portion 70 of the drying device 3 from the oil inflow pipe 80. The oil flowing in from the oil inflow pipe 80 heats the casing 6 from the entire outer periphery thereof. Then, the oil whose temperature has been reduced by transferring heat to the casing 6 moves to the lower part of the jacket part 70, is discharged from the oil discharge pipe 79 to the flow pipe 77, is heated again by the heater 78, and is heated inside the jacket part 70. Circulate. Since the outer wall 71 which comprises the jacket part 70 is covered with the heat insulating material 72 at this time, discharge | release of the heat of the oil from the outer wall 71 to the exterior is suppressed. The control panel 103 adjusts the heating of the heater 78 and the flow rate of the oil sent out by the hydraulic pump 76 so that the temperature in the casing 6 becomes about 80 degrees due to the heat of the oil. In the casing 6 which has been decompressed by the vacuum pump 96, the boiling point of the water and essential oil of the residue is lower than usual. Therefore, if the temperature in the casing 6 is about 80 degrees, water and essential oil are removed from the residue. Vaporize. Therefore, the energy required for heating can be suppressed.

  Further, the electric motor 33 is operated to rotate the upper drive shaft 31. When the upper drive shaft 31 is rotated, the lower drive shaft 51 that is integrally connected to the upper drive shaft 31 via the connecting member 50 is also rotated, and together with the boss portion 60 fixed to the lower drive shaft 51, the stirring plate 53. And the rotating shaft 62 rotate. At this time, the rotating shaft 62 rotates together with the pinion 63 and the rack 64 while rotating together with the boss portion 60. Thus, the upper and lower stirring plates 53 are rotated by the rotation of the lower drive shaft 51, and the deep portion and the central portion are stirred so as to scoop up the residue. At the same time, the circular blade 52 rotates around the rotation shaft 62, crushes the oil vesicles of the pericarp contained in the residue, and pulverizes the residue while allowing the essential oil to jump out of it. At this time, by attaching a large number of circular blades 52, the residue is cut smaller than the size of the interval, and the upper and lower circular blades 52 are alternately arranged so that they pass through this portion. The residue is cut into finer pieces and pulverized.

  Moisture and essential oil evaporated from the residue are sucked together with the air sucked by the vacuum pump 96 from the first suction port 15 of the casing 6 and reach the air passage of the condenser 85 through the first suction pipe 16.

  At this time, the cooling water supplied from the cooling water supply pipe 87 connected to the condenser 85 passes through the cooling tube in the condenser 85 and cools the inside of the air passage. As a result, the vaporized water and essential oil are condensed in the process of passing through the air passage and become a condensate. The cooling water supplied from the cooling water supply pipe 87 is cooled in the air passage, the temperature rises, the cooling tube rises rearward, and is discharged from the cooling water drain pipe 88.

  The condensate flows forward in the air passage along the inclination of the condenser 85, falls into the reservoir 90 through the connecting pipe 91, and is stored. The condensate of moisture and essential oil stored in the reservoir 90 is taken out from the drain tube 93 of the reservoir 90 and separated into moisture and essential oil by a known centrifuge or the like. Thus, citrus essential oil is extracted from the residue which remains after squeezing fruit juice from citrus.

  Further, when the condensate is stored in the reservoir 90 and the operation of each device is stopped, the object to be dried in which moisture and essential oil are evaporated from the residue remains in the casing 6. The object to be dried is taken out of the casing 6 by opening the sealing lid 21 of the outlet 20 of the casing 6. And an organic fertilizer is produced | generated by adding an enzyme etc. to this to-be-dried body, and making it ferment.

-Effect of the embodiment-
Therefore, in this embodiment, since the essential oil is extracted together with moisture from the residue containing the skin that is rich in essential oil, a condensate rich in essential oil can be obtained, and the essential oil can be efficiently extracted. Can do.

  Further, since the stirring blade 54 has a circular blade 52 and is stirred while the residue is pulverized by the circular blade 52, the oil can be crushed and the essential oil can be taken out of the oil and the residue can be finely divided. By crushing and increasing the surface area, vaporization of moisture and essential oil is promoted, and the essential oil can be extracted efficiently.

  Further, since the residue is heated while being stirred by the stirring plate 53 of the stirring blade 54, moisture and essential oil can be vaporized from the residue in the deep part, and these vaporizations are promoted and the essential oil is efficiently extracted. can do.

  Moreover, since essential oil is extracted without using additives, such as an organic solvent, safe essential oil can be extracted.

  Furthermore, the to-be-dried body which remains after vaporizing a water | moisture content and essential oil from a residue is fermented, and it utilizes as an organic fertilizer. For this reason, the residue conventionally treated as industrial waste can be used not only as a raw material for extracting essential oil, but also as an organic fertilizer.

  Further, the heated oil is circulated through the jacket portion 70 by the heater 78, so that the temperature in the casing 6 is increased uniformly. For this reason, the residue which is a solid substance in the casing 6 can be heated from the entire outer periphery of the casing 6, the vaporization of moisture and essential oil is promoted, and the essential oil with stable quality is efficiently extracted. Can do.

<< Other Embodiments >>
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although the stirring blade 54 shall have the stirring board 53 and the disk shaped circular blade 52, the shape of the circular blade 52 is not restricted to this, A residue is grind | pulverized, rotating. Any blade-like tool can be used. For example, it may be a wheel-shaped blade.

  As described above, the present invention is useful for a method for extracting essential oil from a residue remaining after squeezing fruit juice from citrus fruits such as persimmons and a vacuum distillation essential oil extracting device used therefor.

It is the side view which looked at the vacuum distillation essential oil extraction device concerning the embodiment of the present invention from the right side. It is a top view of a vacuum distillation essential oil extraction apparatus. It is the rear view which looked at the vacuum distillation essential oil extraction apparatus from back. It is the front view which looked at the vacuum distillation essential oil extraction apparatus from the front. It is the VV sectional view taken on the line of FIG. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is sectional drawing which decomposes | disassembles and shows the insertion part of the upper side drive shaft to a shaft insertion hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum distillation essential oil extraction apparatus 6 Casing 8 Input port 15 1st suction port 20 Outlet 30 Shaft insertion hole 31 Upper side drive shaft (drive shaft)
33 Motor (rotating means)
51 Lower drive shaft (drive shaft)
52 Circular blade (stirring blade)
70 Jacket portion 85 Condenser 90 Reservoir 94 Second suction port 96 Vacuum pump (pressure reduction means)

Claims (3)

A method for extracting essential oil from citrus fruits,
Pressing the citrus fruit to squeeze out the juice, separating the juice from the residue,
A vacuum distillation step in which the residue is stirred while being pulverized with a blade-like stirring blade and heated under reduced pressure to vaporize moisture and essential oil from the residue;
A condensation step of cooling the vaporized water and essential oil to obtain a condensate;
A method for extracting essential oil from citrus fruits, comprising a separation step of separating the essential oil from the condensed liquid. In the method of extracting essential oil from the citrus fruit of Claim 1,
A method for extracting essential oil from citrus fruits, comprising a fermentation step of fermenting a dried material remaining after vaporizing water and essential oil from the residue in the vacuum distillation step to obtain an organic fertilizer. A vacuum distillation essential oil extraction device that extracts citrus essential oil from the residue remaining after squeezing fruit juice from citrus,
A sealed casing provided with an inlet for charging the residue, an outlet for removing the treated residue, and a first suction port;
A sealed jacket portion provided between the casing and the outer periphery;
Circulating heating oil to the jacket part, raising the temperature in the casing, heating means for vaporizing moisture and essential oil from the residue;
A condenser that cools and condenses vaporized water and essential oil sucked from the first suction port of the casing, and discharges the condensate;
A hermetic reservoir provided below the condenser for storing condensate from the condenser and having a second suction port;
A pressure reducing means for sucking air from the second suction port of the reservoir and depressurizing the casing, the condenser, and the reservoir;
Rotating means for rotating a drive shaft inserted in a sealed manner in a shaft insertion hole provided in the casing,
A vacuum distillation essential oil extraction device, wherein the drive shaft is provided with a blade-like stirring blade for stirring the residue while pulverizing the residue in the casing.

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