Three-stage fractionating tower for eucalyptus oil

Abstract

The invention discloses a three-stage eucalyptus oil fractionating tower and belongs to the technical field of cineole extraction equipment.The three-stage eucalyptus oil fractionating tower comprises a fractionating tower body, a feeding pipe is installed at the top end of the fractionating tower body in a communicating mode, a discharging pipe is installed at the bottom of the fractionating tower body in a communicating mode, and a filtering assembly capable of filtering entering eucalyptus oil is assembled in the fractionating tower body; the dehydration assembly can be used for carrying out oil-water separation on the filtered eucalyptus oil, and a dealdehyding assembly capable of carrying out dealdehyding treatment on the eucalyptus oil subjected to oil-water separation and a deodorization assembly capable of carrying out deodorization treatment on the eucalyptus oil subjected to dealdehyding treatment are also assembled in the fractionating tower; through integrated filtration, dehydration, dealdehyding and deodorization assemblies, a medicinal product with more than or equal to 85% of cineole, less than or equal to 30 ppm of total aldehyde and less than or equal to 200 ppm of water can be directly obtained through discharging.

Description

Technical Field

[0001] This invention relates to the field of eucalyptus oil extraction equipment technology, and in particular to a three-stage fractionation tower for eucalyptus oil. Background Technology

[0002] In the extraction of eucalyptol, a key active ingredient in eucalyptus oil, there is significant medicinal value and market demand. However, existing eucalyptus oil extraction and processing technologies, such as simple distillation or fractionation, while capable of initially extracting eucalyptus oil, are clearly insufficient in the targeted separation and purification of eucalyptol.

[0003] In existing technologies, although filtration devices are added or simple deodorization treatments are used, these methods can mostly only solve a single problem and cannot achieve comprehensive purification of eucalyptol in eucalyptus oil. For example, some filtration devices can remove some impurities but cannot effectively separate oil and water, while some deodorization methods can remove some odors but have limited effect on removing aldehydes, thereby reducing the activity of eucalyptol in eucalyptus oil. Summary of the Invention

[0004] The purpose of this invention is to address the problem that most existing extraction devices can only solve a single problem and cannot achieve comprehensive purification of eucalyptol in eucalyptus oil, and to propose a three-stage fractionation tower for eucalyptus oil.

[0005] To achieve the above objectives, the present invention employs the following technology: a three-stage fractionation tower for eucalyptus oil, comprising a fractionation tower, wherein a feed pipe is connected to the top of the fractionation tower and a discharge pipe is connected to the bottom of the fractionation tower; the interior of the fractionation tower is equipped with a filter assembly capable of filtering the incoming eucalyptus oil, and a dehydration assembly capable of separating the filtered eucalyptus oil from water; the interior of the fractionation tower is also equipped with a formaldehyde removal assembly capable of removing formaldehyde from the oil-water separated eucalyptus oil, and a deodorization assembly capable of removing odors from the formaldehyde-removed eucalyptus oil.

[0006] As a further description of the above technical solution: the filter assembly includes a hopper and a sleeve fixedly installed on the fractionation tower, a threaded conveying rod rotatably installed inside the sleeve, one end of the threaded conveying rod extending to the outside of the sleeve being fixedly connected to the output end of the motor, and a discharge pipe and a through hole respectively connected to the sleeve.

[0007] As a further description of the above technical solution: the dehydration assembly includes a base fixedly installed inside the fractionation tower, a protective cover and a centrifugal drum respectively set on the base, a feed pipe connected to the middle of the centrifugal drum, a ratchet wheel fixedly installed on the feed pipe, a motor fixedly installed on the protective cover, and a gear fixedly installed on the output end of the motor.

[0008] As a further description of the above technical solution: the centrifugal drum is also equipped with an opening and closing component; The opening and closing components include a baffle frame fixedly installed on the distillation tower, a rotating plate and a vertical plate respectively set on the centrifugal drum, and an extension block set on the rotating plate by a spring.

[0009] As a further description of the above technical solution: a channel is provided in the middle of the centrifugal drum, a rotating plate is rotatably mounted on the centrifugal drum, and a torsion spring is provided at the connection with the centrifugal drum. The outer gear ring of the ratchet meshes with the gear, and the drain pipe is connected to and installed on the fractionation tower and located on one side of the centrifugal drum.

[0010] As a further description of the above technical solution: the formaldehyde removal component includes a support plate fixedly installed in the fractionation tower, a sealing plate set in the fractionation tower by a rotating rod, one end of the rotating rod extending to the outside of the fractionation tower being fixedly connected to the output end of the motor, and a sealing ring provided on the outside of the sealing plate.

[0011] As a further description of the above technical solution: the support plate is also equipped with a stirring component; The stirring component includes a stirring blade and a vertical rod rotatably mounted on a support plate. A ratchet is fixedly mounted on the vertical rod. The stirring blade and the vertical rod are respectively engaged with a synchronous belt by a pulley connected coaxially, and are protected by a protective frame.

[0012] As a further description of the above technical solution: the sealing plate is located below the stirring blade, the outer gear ring of the ratchet II meshes with the gear, the air inlet pipe is connected and installed on the fractionation tower, and the annular pipe is fixedly installed inside the fractionation tower.

[0013] As a further description of the above technical solution: the deodorization component includes an inner cylinder fixedly installed inside the fractionation tower, a heating element wrapped around the outside of the inner cylinder, an exhaust pipe provided between the vacuum pump and the fractionation tower, and a connecting pipe connected to and installed on the fractionation tower, located below the sealing plate.

[0014] As a further description of the above technical solution: there are two exhaust pipes, one of which is connected to the inlet of the fractionation tower and the vacuum pump, and the other is connected to the outlet of the vacuum pump. The end of the discharge pipe extending into the interior of the fractionation tower is connected to the inner cylinder.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By incorporating a filtration system, including a hopper and a threaded conveyor, solid impurities in eucalyptus oil can be effectively separated and collected via a discharge pipe, ensuring the purity of eucalyptol in the oil and improving the effectiveness and efficiency of subsequent processing. The dehydration system utilizes a centrifugal drum and opening / closing mechanism to achieve oil-water separation using centrifugal force. The opening and closing of the rotating plate controls the flow of eucalyptus oil, while the drain pipe discharges the separated water, ensuring effective separation and removing moisture that affects eucalyptol quality. The formaldehyde removal system, through a stirring component and sealing plate, combined with the use of oxidants and alkali solutions, can quickly complete oxidation and neutralization reactions, removing aldehyde compounds that affect eucalyptol quality and improving the quality and activity of eucalyptol in the oil. The deodorization system uses a combination of heating elements and a vacuum pump. Through the synergistic effect of heating and vacuum, odorous components in the eucalyptus oil are volatilized and adsorbed, removing odorous components that affect eucalyptol quality. Through this integrated filtration, dehydration, formaldehyde removal, and deodorization system, the output directly yields eucalyptol ≥85% and total aldehydes ≤30%. Pharmaceutical grade products with a concentration of ppm and a water concentration of 200 ppm or less. Attached Figure Description

[0016] Figure 1 An overall schematic diagram provided according to an embodiment of the present invention is shown; Figure 2 The present invention provides an embodiment of the invention. Figure 1 Another perspective view; Figure 3 A cross-sectional view of a fractionation column provided according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of a filtering component provided according to an embodiment of the present invention is shown; Figure 5 The present invention provides an embodiment of the invention. Figure 4 The bottom view; Figure 6 A schematic diagram of a dehydration assembly provided according to an embodiment of the present invention is shown; Figure 7 The present invention provides an embodiment of the invention. Figure 6 Another perspective view; Figure 8 This diagram illustrates the effect of opening and closing the internal channels of a centrifugal drum according to an embodiment of the present invention. Figure 9 A cross-sectional view of a protective cover provided according to an embodiment of the present invention is shown; Figure 10 A cross-sectional view of a rotating plate provided according to an embodiment of the present invention is shown; Figure 11 A schematic diagram of a stirring component provided according to an embodiment of the present invention is shown; Figure 12A schematic diagram of a deodorization component provided according to an embodiment of the present invention is shown.

[0017] Legend: 10. Fractionating tower; 11. Feed pipe; 12. Discharge pipe; 13. Filter assembly; 131. Hopper; 132. Sleeve; 133. Threaded conveyor rod; 134. Motor 1; 135. Discharge pipe; 136. Through hole; 14. Dewatering assembly; 141. Base; 142. Protective cover; 143. Centrifugal drum; 144. Feed pipe; 145. Ratchet 1; 146. Motor 2; 147. Gear; 148. Opening and closing parts; 1481. Blocking frame; 1482. Rotating plate; 1483. Vertical plate; 1484. Extension block; 1485. Spring; 149. Drain pipe; 15. Formaldehyde removal component; 151. Support plate; 152. Sealing plate; 153. Rotating rod; 154. Motor III; 155. Sealing ring; 156. Stirring component; 1561. Stirring blade; 1562. Vertical rod; 1563. Ratchet II; 1564. Synchronous belt; 1565. Protective frame; 157. Air inlet pipe; 158. Annular pipe; 16. Deodorization component; 161. Inner cylinder; 162. Heating element; 163. Vacuum pump; 164. Exhaust pipe; 165. Connecting pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figure 1 - Figure 12 This embodiment provides a three-stage fractionation tower for eucalyptus oil, including a fractionation tower 10. A feed pipe 11 is connected to the top of the fractionation tower 10, through which eucalyptus oil can be transported into the fractionation tower 10. An outlet pipe 12 is connected to the bottom of the fractionation tower 10. The fractionation tower 10 is equipped with a filter assembly 13 for filtering the incoming eucalyptus oil, and a dehydration assembly 14 for separating oil and water in the filtered eucalyptus oil. The fractionation tower 10 is also equipped with a formaldehyde removal assembly 15 for removing formaldehyde from the oil and water separated eucalyptus oil, and a deodorization assembly 16 for removing odor from the formaldehyde-removed eucalyptus oil.

[0020] Reference Figure 3 - Figure 5Specifically, in order to filter eucalyptus oil, a filter assembly 13 is provided. The filter assembly 13 includes a hopper 131 and a sleeve 132 fixedly installed on the fractionation tower 10. The hopper 131 is conical and has sieve holes on its surface. The hopper 131 can separate solid impurities inside the eucalyptus oil while protecting the eucalyptol from damage. A threaded conveying rod 133 is rotatably installed inside the sleeve 132. One end of the threaded conveying rod 133 extending to the outside of the sleeve 132 is fixedly connected to the output end of a motor 134. The motor 134 can drive the threaded conveying rod 133 to rotate. A discharge pipe 135 and a through hole 136 are respectively connected to the sleeve 132. The discharge pipe 135 can discharge and collect solid impurities, while the through hole 136 can prevent eucalyptus oil from accumulating inside the sleeve 132. The hopper 131 is connected to the sleeve 132. In use, eucalyptus oil is fed into the fractionation tower 10 through the feed pipe 11. After entering the fractionation tower 10, the eucalyptus oil first comes into contact with the hopper 131. The sieve holes on the hopper 131 filter the eucalyptus oil, removing solid impurities that interfere with the separation of eucalyptol while protecting the eucalyptol from damage. The filtered solid impurities fall into the sleeve 132, while the eucalyptus oil inside the sleeve 132 is discharged through the through hole 136. Since the size of the through hole 136 is adapted to the sieve holes, the solid impurities will not fall through the through hole 136. Then, the motor 134 is started, which drives the threaded conveyor rod 133 to rotate. The rotating threaded conveyor rod 133 transports the solid impurities to the discharge pipe 135, where they are then discharged and collected.

[0021] Reference Figure 6 - Figure 10 Specifically, in order to remove moisture that affects the quality of eucalyptol, a dehydration assembly 14 is provided. The dehydration assembly 14 includes a base 141 fixedly installed inside the fractionation tower 10, a protective cover 142 and a centrifugal drum 143 respectively installed on the base 141, and the centrifugal drum 143 is rotatably connected to the base 141. The feed pipe 144 is connected to the middle of the centrifugal drum 143, and the middle of the centrifugal drum 143 is an oil phase channel. The centrifugal force generated by the rotation of the centrifugal drum 143 can separate the eucalyptus oil into oil and water. A ratchet 145 is fixedly installed on the feed pipe 144, a motor 146 is fixedly installed on the protective cover 142, and a gear 147 is fixedly installed on the output end of the motor 146. The motor 146 can drive the gear 147 to rotate.

[0022] In more detail, the centrifugal drum 143 is also equipped with an opening and closing component 148; The opening and closing component 148 includes a baffle 1481 fixedly installed on the fractionation tower 10, a rotating plate 1482 and a vertical plate 1483 respectively disposed on the centrifugal drum 143. When the centrifugal drum 143 rotates, it will also drive the rotating plate 1482 and the vertical plate 1483 to rotate. In the initial state, the rotating plate 1482 blocks the channel in the middle of the centrifugal drum 143, so that the filtered eucalyptus oil will not enter the channel. The extension block 1484 is disposed on the rotating plate 1482 by a spring 1485. The reaction force of the spring 1485 enables the extension block 1484 to be reset. At the same time, the two sides of the extension block 1484 are set as arc surfaces.

[0023] In more detail, a channel is provided in the middle of the centrifugal drum 143, the rotating plate 1482 is rotatably mounted on the centrifugal drum 143, and a torsion spring is provided at the connection with the centrifugal drum 143. The reaction force of the torsion spring enables the rotating plate 1482 to rotate and return to its original position. The outer gear ring of the ratchet 145 meshes with the gear 147. The drain pipe 149 is connected and installed on the fractionation tower 10 and is located on one side of the centrifugal drum 143. An electrically controlled valve is provided on the drain pipe 149. The filtered eucalyptus oil falls into the centrifugal drum 143. At this time, the motor 146 is started, which drives the gear 147 to rotate clockwise. Since the ratchet 145 and ratchet 2 1563 are existing technologies, and the ratchet 145 and ratchet 2 1563 are composed of an external gear ring and an internal gear ring respectively, when the gear 147 rotates clockwise, the external gear ring and the internal gear ring on the ratchet 145 rotate as a whole, while only the external gear ring of the ratchet 2 1563 rotates, so the ratchet 2 1563 rotates idling and does not drive the vertical rod 1562 to rotate. When the ratchet 145 rotates as a whole, it will also drive the feed pipe 144 and the centrifugal drum 143 to rotate. The centrifugal force field is formed by the rotating centrifugal drum 143. Due to the different densities of eucalyptus oil and water, water will be thrown to the outside, while eucalyptus oil will accumulate in the central area. By opening the electrically controlled valve on the drain pipe 149, and then by driving equipment (such as a water pump), the drain pipe 149 can suck out and collect the water from the outside. When the centrifugal drum 143 rotates, the extension block 1484 will also extend outward through centrifugal force, such as... Figure 8As shown, the extended block 1484 contacts the blocking frame 1481 as the centrifugal drum 143 rotates. The blocking frame 1481 prevents the rotating plate 1482 from rotating with the centrifugal drum 143, thus opening the central channel of the rotating centrifugal drum 143. This allows the eucalyptus oil in the middle to fall through the channel and accumulate on the top of the sealing plate 152. After the centrifugal drum 143 rotates to a certain angle, the rotating plate 1482 contacts the vertical plate 1483. The vertical plate 1483 blocks the rotation, causing the rotating plate 1482 to rotate with the centrifugal drum 143 again. The extended block 1484 retracts due to the pressure of the blocking frame 1481 on its curved surface, thus detaching from the blocking frame 1481. The rotating plate 1482 then resets due to the reaction force of the torsion spring. This process repeats, causing the rotating plate 1482 to continuously open and close. The dehydration assembly 14 removes moisture that affects the quality of eucalyptol while maintaining its stability.

[0024] Reference Figure 7 - Figure 11 Specifically, in order to remove aldehyde compounds that affect the quality of eucalyptol, a formaldehyde removal component 15 is provided. The formaldehyde removal component 15 includes a support plate 151 fixedly installed in the fractionation tower 10, and a sealing plate 152 set in the fractionation tower 10 by a rotating rod 153. The sealing plate 152 can form a platform to accumulate the dehydrated eucalyptus oil. One end of the rotating rod 153 extending to the outside of the fractionation tower 10 is fixedly connected to the output end of the motor 154. The motor 154 can drive the rotating rod 153 to rotate the sealing plate 152. A sealing ring 155 is provided on the outside of the sealing plate 152. The sealing ring 155 can increase the sealing between the sealing plate 152 and the fractionation tower 10, thereby preventing eucalyptus oil leakage.

[0025] In more detail, the support plate 151 is also equipped with a stirring component 156; The stirring component 156 includes a stirring blade 1561 and a vertical rod 1562 rotatably mounted on a support plate 151. The rotating stirring blade 1561 can stir the eucalyptus oil. A ratchet 1563 is fixedly mounted on the vertical rod 1562. The stirring blade 1561 and the vertical rod 1562 are respectively engaged with a synchronous belt 1564 through a pulley connected coaxially and protected by a protective frame 1565. When the vertical rod 1562 rotates, the stirring blade 1561 can rotate synchronously with the vertical rod 1562 through the meshing transmission of the pulley and the synchronous belt 1564. The protective frame 1565 can reduce the contact between the pulley and the synchronous belt 1564 and the eucalyptus oil.

[0026] In more detail, the sealing plate 152 is located below the stirring blade 1561, the outer gear ring of the ratchet 1563 meshes with the gear 147, the air inlet pipe 157 is connected and installed on the fractionation tower 10, the oxidant can be delivered into the fractionation tower 10 through the air inlet pipe 157, the annular pipe 158 is fixedly installed in the fractionation tower 10, the annular pipe 158 is connected to the liquid inlet pipe, the alkali solution can be delivered into the annular pipe 158 through the liquid inlet pipe, and then evenly sprayed out through the nozzle on the annular pipe 158; After the oil-water separation of eucalyptus oil is completed, the motor 146 is restarted to drive the gear 147 to rotate counterclockwise. At this time, the outer gear ring on the ratchet 145 will only rotate idly, while the outer and inner gear rings on the ratchet 1563 will rotate as a whole, thereby driving the vertical rod 1562 to rotate. Through the meshing transmission of the pulley and the synchronous belt 1564, the stirring blade 1561 will also rotate. Then, the alkali solution can be transported into the annular pipe 158 through the liquid inlet pipe, and then evenly sprayed out through the nozzle on the annular pipe 158. The air inlet pipe 157 delivers the oxidant into the fractionation tower 10, so that the dehydrated eucalyptus oil comes into contact with the alkali solution and the oxidant. Through the rotating stirring blade 1561, the eucalyptus oil, alkali solution and oxidant can be fully contacted, oxidizing the aldehydes in the eucalyptus oil into acids. Through stirring, the oxidation and neutralization reactions can be completed quickly, thereby effectively removing aldehyde compounds that affect the quality of eucalyptol in eucalyptol, while maintaining the activity of eucalyptol. Then, the motor 154 is started, which drives the rotating rod 153 to rotate the sealing plate 152, so that the sealing plate 152 no longer forms a seal with the fractionation tower 10, and the reacted eucalyptus oil falls into the inner cylinder 161 for collection. Then the sealing plate 152 is rotated back to its original position.

[0027] Reference Figure 12 Specifically, in order to remove odor components that affect the quality of eucalyptol, a deodorization component 16 is provided. The deodorization component 16 includes an inner cylinder 161 fixedly installed inside the fractionation tower 10, a heating element 162 wound around the outside of the inner cylinder 161, and the temperature inside the inner cylinder 161 can be controlled by the heating element 162 (the heating element 162 is a heating wire in the prior art). An exhaust pipe 164 is provided between the vacuum pump 163 and the fractionation tower 10. The vacuum pump 163 enables a vacuum environment to be formed between the inner cylinder 161 and the sealing plate 152. A connecting pipe 165 (with an electrically controlled valve installed on the connecting pipe 165) is connected to the fractionation tower 10 and located below the sealing plate 152. The vapor of eucalyptus oil after heating can be drawn out through the connecting pipe 165.

[0028] In more detail, there are two exhaust pipes 164. One of them is connected to the inlet of the fractionation tower 10 and the vacuum pump 163, and the other is connected to the outlet of the vacuum pump 163. The discharge pipe 12 extends into the interior of the fractionation tower 10 and is connected to the inner cylinder 161. Downstream of the deodorization component 16, the fractionation tower 10 is also provided with a vacuum precision fractionation section 17, which is used to side-stream the product stream with a eucalyptol content ≥85% (GC). The deodorized eucalyptol enters the vacuum precision fractionation section 17 before entering the discharge pipe 12. The eucalyptol oil obtained by side-stream sampling has a temperature of 60–63 ℃ and a pressure of 3 kPaA. The GC sample shows that its internal eucalyptol content is 86.2% and the limonene content is 4.1%, thus meeting the pharmaceutical grade requirements. After the eucalyptus oil falls into the inner cylinder 161, the vacuum pump 163 is activated to remove excess gas between the inner cylinder 161 and the sealing plate 152, creating a vacuum environment. Then, the heating element 162 is powered to increase the temperature inside the inner cylinder 161, thus heating the eucalyptus oil. The vacuum environment lowers the boiling point, causing the odor components in the eucalyptus oil to volatilize. These odor components are then drawn out by the connecting pipe 165 along with the vapor, effectively removing odor components that affect the quality of eucalyptol while maintaining its stability. The processed eucalyptol is then discharged and collected through the discharge pipe 12.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A three-stage fractionation column for eucalyptus oil, comprising a fractionation column (10), characterized in that, The top of the fractionation tower (10) is connected to a feed pipe (11), and the bottom of the fractionation tower (10) is connected to a discharge pipe (12). The fractionation tower (10) is equipped with a filter assembly (13) that can filter the incoming eucalyptus oil, and a dehydration assembly (14) that can separate the filtered eucalyptus oil from water. The fractionation tower (10) is also equipped with a formaldehyde removal assembly (15) that can remove formaldehyde from the eucalyptus oil after oil-water separation, and a deodorization assembly (16) that can remove odor from the eucalyptus oil after formaldehyde removal.

2. The three-stage fractionation tower for eucalyptus oil according to claim 1, characterized in that, The filter assembly (13) includes a hopper (131) and a sleeve (132) fixedly installed on the fractionation tower (10). A threaded conveying rod (133) is rotatably installed inside the sleeve (132). One end of the threaded conveying rod (133) extending to the outside of the sleeve (132) is fixedly connected to the output end of the motor (134). The discharge pipe (135) and the through hole (136) are respectively connected to the sleeve (132).

3. The three-stage fractionation tower for eucalyptus oil according to claim 1, characterized in that, The dehydration assembly (14) includes a base (141) fixedly installed inside the fractionation tower (10), a protective cover (142) and a centrifugal drum (143) respectively installed on the base (141), a feed pipe (144) connected to the middle of the centrifugal drum (143), a ratchet (145) fixedly installed on the feed pipe (144), a motor (146) fixedly installed on the protective cover (142), and a gear (147) fixedly installed on the output end of the motor (146).

4. The three-stage fractionation tower for eucalyptus oil according to claim 3, characterized in that, The centrifugal drum (143) is also equipped with an opening and closing component (148). The opening and closing component (148) includes a baffle (1481) fixedly installed on the fractionation tower (10), a rotating plate (1482) and a vertical plate (1483) respectively set on the centrifugal drum (143), and an extension block (1484) set on the rotating plate (1482) by a spring (1485).

5. A three-stage fractionation tower for eucalyptus oil according to claim 4, characterized in that, The centrifugal drum (143) has a channel in the middle, the rotating plate (1482) is rotatably mounted on the centrifugal drum (143), and a torsion spring is provided at the connection with the centrifugal drum (143). The outer gear ring of the ratchet (145) meshes with the gear (147). The drain pipe (149) is connected and installed on the fractionation tower (10) and is located on one side of the centrifugal drum (143).

6. A three-stage fractionation tower for eucalyptus oil according to claim 3, characterized in that, The formaldehyde removal assembly (15) includes a support plate (151) fixedly installed inside the fractionation tower (10), a sealing plate (152) set inside the fractionation tower (10) by a rotating rod (153), one end of the rotating rod (153) extending to the outside of the fractionation tower (10) and fixedly connected to the output end of the motor (154), and a sealing ring (155) is provided on the outside of the sealing plate (152).

7. A three-stage fractionation tower for eucalyptus oil according to claim 6, characterized in that, The support plate (151) is also equipped with a stirring component (156). The stirring component (156) includes a stirring blade (1561) and a vertical rod (1562) rotatably mounted on a support plate (151). A ratchet (1563) is fixedly mounted on the vertical rod (1562). The stirring blade (1561) and the vertical rod (1562) are respectively engaged with a synchronous belt (1564) by a pulley connected coaxially, and are protected by a protective frame (1565).

8. A three-stage fractionation tower for eucalyptus oil according to claim 7, characterized in that, The sealing plate (152) is located below the stirring blade (1561), the outer gear ring of the ratchet (1563) meshes with the gear (147), the air inlet pipe (157) is connected and installed on the fractionation tower (10), and the annular pipe (158) is fixedly installed inside the fractionation tower (10).

9. A three-stage fractionation tower for eucalyptus oil according to claim 6, characterized in that, The deodorization assembly (16) includes an inner cylinder (161) fixedly installed inside the fractionation tower (10), a heating element (162) wrapped around the outside of the inner cylinder (161), an exhaust pipe (164) provided between the vacuum pump (163) and the fractionation tower (10), and a connecting pipe (165) connected to the fractionation tower (10) and located below the sealing plate (152).

10. A three-stage fractionation tower for eucalyptus oil according to claim 9, characterized in that, There are two exhaust pipes (164), one of which is connected to the inlet of the fractionation tower (10) and the vacuum pump (163), and the other is connected to the outlet of the vacuum pump (163). The discharge pipe (12) extends into the interior of the fractionation tower (10) and is connected to the inner cylinder (161).

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