Device and process for purifying dementholized peppermint oil

Abstract

The invention provides a dementholized peppermint oil purification device and purification process, and relates to the field of dementholized peppermint oil preparation. The dementholized peppermint oil purification device comprises a first shell, the bottom of the first shell is in bolted connection with a second shell, a first treatment barrel is fixedly installed in the first shell, a second treatment barrel is movably installed in the second shell, and a collecting mechanism is installed between the first shell and the first treatment barrel. A centrifugal mechanism is installed between the second shell and the second treatment barrel, a plurality of electric heating wires are fixedly installed in the first treatment barrel, and a discharging and filtering mechanism is installed at the bottom of the second treatment barrel. Through cooperative operation of the collecting mechanism, the centrifugal mechanism, the discharging and filtering mechanism and the like, traditional complicated purification steps are simplified, automatic liquid discharging, rapid centrifugal layering, precise oil-liquid separation and secondary filtering after steam condensation are achieved, and the problems that in the prior art, efficiency is low, the extraction rate is low and purity is insufficient are effectively solved; the dementholized peppermint oil purification quality and the production benefit are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of peppermint oil preparation, and specifically to a purification device and a purification process for peppermint oil. Background Art

[0002] With the development of society, peppermint oil, as an important natural fragrance and medicinal ingredient, is widely used in the fields of food, daily chemicals, medicine, etc. It has the effects of refreshing and anti-inflammatory, and can be used to prepare cold medicines and anti-inflammatory drugs in the pharmaceutical industry, and endow food with a unique refreshing flavor in the food industry.

[0003] The existing purification of peppermint oil requires multiple complicated steps such as raw material steaming, steam condensation, natural sedimentation and stratification, and filtration. These cumbersome steps lead to low purification efficiency. Natural sedimentation and stratification take several hours or even longer, extending the production cycle. For example, in the traditional process, the oil-water mixture after steam condensation needs to be naturally sedimented and stratified in a static state, which takes a long time; when the precipitated liquid is discharged, there is a lack of precise control, which easily leads to the mixed discharge of oil and water. Simple filtration cannot meet the production requirements of high-purity peppermint oil, and multiple repeated operations are required, increasing energy consumption and costs, and may introduce pollution due to improper operation, affecting product quality. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a purification device and a purification process for peppermint oil, which solve the problems of cumbersome purification steps, time-consuming sedimentation and stratification, inconvenient drainage control and incomplete filtration of the existing peppermint oil purification, resulting in low efficiency and poor purity.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A purification device for peppermint oil, including an outer shell one, the bottom of the outer shell one is bolted to an outer shell two, a treatment barrel one is fixedly installed inside the outer shell one, a treatment barrel two is movably installed inside the outer shell two, a collection mechanism is installed between the outer shell one and the treatment barrel one, a centrifugal mechanism is installed between the outer shell two and the treatment barrel two, a plurality of electric heating wires are fixedly installed inside the treatment barrel one, and a discharge and filtration mechanism is installed at the bottom of the treatment barrel two;

[0006] An exhaust port is opened at the top of the treatment barrel one. The collection mechanism includes a condensation pipe and a drain pipe. A plurality of the condensation pipes are fixedly connected in a ring on the outer wall of the treatment barrel one. The intake ends of the plurality of condensation pipes are fixedly connected to the exhaust port, and the exhaust ends of the plurality of condensation pipes are fixedly connected to the drain pipe;

[0007] A liquid inlet is fixedly connected to the top of the second processing barrel. The position of the liquid inlet corresponds to that of the drain pipe. The centrifugal mechanism includes a driving motor, a gear, and a toothed ring. The driving motor is fixedly installed on the inner wall of the second housing. The gear is fixedly installed at the output end of the driving motor. The toothed ring is fixedly connected to the outer wall of the second processing barrel. The toothed ring meshes with the gear.

[0008] A liquid outlet is provided at the bottom of the second processing barrel. The discharging and filtering mechanism includes a discharge pipe, a baffle, a liquid inlet hole, and a connecting pipe. The discharge pipe is slidably installed inside the liquid outlet. The baffle is fixedly connected to the top of the discharge pipe. The liquid inlet hole is provided on the outer wall of the discharge pipe. The connecting pipe is fixedly connected to the bottom of the discharge pipe.

[0009] The discharging and filtering mechanism further includes a sealing cover, an activated carbon filtering layer, and an anhydrous sodium sulfate layer. The sealing cover is threadedly installed at the bottom of the connecting pipe. The activated carbon filtering layer and the anhydrous sodium sulfate layer are movably installed inside the sealing cover. The activated carbon filtering layer is located on top of the anhydrous sodium sulfate layer.

[0010] Preferably, the collection mechanism further includes a water inlet pipe, a cooling pipe, and a water outlet pipe. The water inlet pipe is fixedly installed inside the first housing. The cooling pipe is fixedly connected to the water outlet end of the water inlet pipe. The water outlet pipe is fixedly connected to the water outlet end of the cooling pipe. The water inlet pipe and the water outlet pipe both penetrate through the first housing. The water inlet pipe, the cooling pipe, and the water outlet pipe are all located on top of the condensing pipe and are in contact with the top of the condensing pipe.

[0011] Preferably, the centrifugal mechanism further includes a mounting ring, a roller, and a support ring. The mounting ring is fixedly connected to the inner wall of the second housing. There are multiple rollers movably installed in a ring inside the mounting ring. A support ring is fixedly connected to the outer wall of the second processing barrel. The bottom of the support ring is in contact with the outer wall of the roller.

[0012] Preferably, the discharging and filtering mechanism further includes a round cover, a spring, and a guide shaft. The round cover is fixedly connected to the outer wall of the discharge pipe. A spring is fixedly installed between the round cover and the second processing barrel. There are multiple guide shafts fixedly connected to the bottom of the second processing barrel. The guide shafts penetrate through the inside of the round cover.

[0013] Preferably, an annular glass two is provided at the bottom of the outer wall of the second processing barrel. An annular glass one is provided at the bottom of the outer wall of the second housing.

[0014] Preferably, a feed pipe one is fixedly connected to the top of the first housing. Multiple feed pipes two are fixedly connected to the bottom of the feed pipe one and are distributed in a ring. The bottom of the feed pipes two is fixedly connected to the top of the first processing barrel. The multiple feed pipes two and the multiple condensing pipes are staggered.

[0015] Preferably, a slag discharge pipe is fixedly connected to the bottom of the first treatment barrel, and a solenoid valve is fixedly installed inside the slag discharge pipe.

[0016] Preferably, support legs are fixedly connected to the bottom of the second housing.

[0017] A purification process of peppermint oil, using the purification device of peppermint oil described in any one of the above, includes the following steps.

[0018] S1. Raw material pretreatment

[0019] Crushed peppermint stems and leaves and water are added into the first treatment barrel through the first feed pipe and the second feed pipe. The volume ratio of water to the raw material is 3:1. The first treatment barrel is heated to 100 °C by the electric heating wire to make it boil, and the steam carries the peppermint oil molecules and rises.

[0020] S2. Steam condensation

[0021] The steam enters the condenser through the exhaust port. Cooling water is introduced into the cooling pipe to liquefy the steam to form an oil-water mixture, and the oil-water mixture flows into the second treatment barrel through the drain pipe.

[0022] S3. Centrifugal separation

[0023] Then, the driving motor drives the gear to engage with the toothed ring, making the second treatment barrel rotate at a high speed, and using centrifugal force to separate the oil and water.

[0024] S4. Stratification observation

[0025] Push the round cover upward to expose the liquid inlet hole. The oil-water mixture is discharged through the discharge pipe, and the position of the oil layer is observed through the first annular glass and the second annular glass.

[0026] S5. Refining treatment

[0027] After the liquid is drained, a sealing cover is installed at the bottom of the connecting pipe. The oil is adsorbed by impurities through the activated carbon filter layer and dehydrated by the anhydrous sodium sulfate layer in sequence to obtain refined peppermint oil.

[0028] The present invention provides a purification device and a purification process of peppermint oil. It has the following beneficial effects:

[0029] 1. By setting up the collection mechanism, during the distillation process, the steam carries the peppermint oil molecules and enters the condenser through the exhaust port. At this time, the water inlet pipe introduces cooling water into the cooling pipe. The cooling pipe fits with the top of the condenser, and the cooling water takes away the heat, making the steam quickly liquefy to form an oil-water mixture. The mixture automatically drains into the second treatment barrel through the drain pipe under the action of gravity. This process does not require manual transfer of the liquid, reducing the labor input, and at the same time avoiding problems such as liquid spilling and pollution caused by manual operation, improving the safety and stability of the production process.

[0030] 2. By setting up a centrifugal mechanism, during use, the driving motor drives the gear to rotate. The gear meshes with the toothed ring, causing the second processing barrel to rotate at high speed. Under the action of centrifugal force, the oil and water in the oil-water mixture are quickly separated due to different densities. Compared with the traditional sedimentation and stratification method, the centrifugal stratification speed is faster, which can achieve efficient separation in a short time, greatly shortening the stratification time. Moreover, the centrifugal separation is more thorough, which can effectively improve the extraction rate of peppermint oil, reduce raw material waste, and improve economic benefits.

[0031] 3. By setting up a discharge and filtration mechanism, during use, push the round cover upward. Under the cooperation of the spring and the guide shaft, the liquid inlet hole is exposed, and the oil-water mixture is discharged through the discharge pipe. When it is observed that the position of the oil layer is appropriate, stop discharging the liquid. Install a sealing cover at the bottom of the connecting pipe. The oil passes through the activated carbon filter layer in sequence. The activated carbon adsorbs impurities such as pigments and odors in the oil by its adsorption property, and then passes through the anhydrous sodium sulfate layer. The anhydrous sodium sulfate absorbs the water in the oil, realizing the function of secondary filtration of the oil. It can accurately control the separate discharge of the oil liquid, avoid the water phase from mixing into the oil phase, and the secondary filtration effectively improves the purity of the peppermint oil, making its quality better. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of a peppermint oil purification device and purification process proposed by the present invention;

[0033] Figure 2 is the cross-sectional structural schematic diagram of a peppermint oil purification device and purification process proposed by the present invention;

[0034] Figure 3 is Figure 2 the enlarged structural schematic diagram at position A in

[0035] Figure 4 is Figure 2 the enlarged structural schematic diagram at position B in

[0036] Figure 5 is the enlarged structural schematic diagram of the centrifugal mechanism and the discharge and filtration mechanism in a peppermint oil purification device and purification process proposed by the present invention;

[0037] Figure 6 is the enlarged structural schematic diagram of the collection mechanism in a peppermint oil purification device and purification process proposed by the present invention;

[0038] Figure 7 is the bottom structural schematic diagram of the first processing barrel in a peppermint oil purification device and purification process proposed by the present invention.

[0039] Among them, 1. Outer shell one; 2. Outer shell two; 201. Ring-shaped glass one; 3. Treatment barrel one; 301. Exhaust port; 302. Slag discharge pipe; 4. Treatment barrel two; 401. Ring-shaped glass two; 402. Liquid outlet; 403. Liquid inlet; 5. Collection mechanism; 501. Condenser pipe; 502. Drain pipe; 503. Water inlet pipe; 504. Cooling pipe; 505. Water outlet pipe; 6. Centrifugal mechanism; 601. Driving motor; 602. Gear; 603. Tooth ring; 604. Mounting ring; 605. Roller; 606. Support ring; 7. Discharge and filtration mechanism; 701. Discharge pipe; 702. Baffle; 703. Liquid inlet hole; 704. Round cover; 705. Spring; 706. Guide shaft; 707. Connecting pipe; 708. Sealing cover; 709. Activated carbon filter layer; 710. Anhydrous sodium sulfate layer; 8. Feed pipe one; 9. Feed pipe two; 10. Electric heating wire; 11. Support leg. Detailed implementation manners

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] Embodiment 1:

[0042] As Figures 1-7As shown in the figure, an embodiment of the present invention provides a purification device for peppermint oil, which includes a first outer shell 1. The bottom of the first outer shell 1 is bolted to a second outer shell 2. The bolted connection method facilitates the disassembly and installation of the device, which is convenient for later maintenance and repair. A first treatment barrel 3 is fixedly installed inside the first outer shell 1. The first treatment barrel is a place for preliminary treatments such as distillation. A second treatment barrel 4 is movably installed inside the second outer shell 2. The second treatment barrel is used for further treating the distilled mixed liquid. A collection mechanism 5 is installed between the first outer shell 1 and the first treatment barrel 3. The collection mechanism is responsible for condensing the steam generated by distillation and collecting the liquid. A centrifugal mechanism 6 is installed between the second outer shell 2 and the second treatment barrel 4. The centrifugal mechanism 6 realizes the rapid centrifugal stratification of the oil-water mixture. A plurality of heating wires 10 are fixedly installed inside the first treatment barrel 3. The heating wires 10 are used to heat the raw materials in the first treatment barrel 3 to make them boil and generate steam. A discharge and filtration mechanism 7 is installed at the bottom of the second treatment barrel 4. The discharge and filtration mechanism 7 is used for filtering and refining the separated oil. An exhaust port 301 is opened at the top of the first treatment barrel 3. The exhaust port facilitates the discharge of the steam generated by distillation. The collection mechanism 5 includes a condensing pipe 501 and a liquid discharge pipe 502. A plurality of condensing pipes 501 are fixedly connected in a ring on the outer wall of the first treatment barrel 3. The inlet ends of the plurality of condensing pipes 501 are fixedly connected to the exhaust port 301. The exhaust ends of the plurality of condensing pipes 501 are fixedly connected to a liquid discharge pipe 502. Such a structural design can make full use of space, enable the steam to fully contact with the condensing pipe 501, and improve the condensation efficiency. A liquid inlet 403 is fixedly connected to the top of the second treatment barrel 4. The position of the liquid inlet 403 corresponds to that of the liquid discharge pipe 502, which is convenient for the condensed liquid to flow smoothly into the second treatment barrel 4. The centrifugal mechanism 6 includes a driving motor 601, a gear 602, and a gear ring 603. The driving motor 601 is fixedly installed on the inner wall of the second outer shell 2. The gear 602 is fixedly installed at the output end of the driving motor 601. The gear ring 603 is fixedly connected to the outer wall of the second treatment barrel 4. The gear ring 603 meshes with the gear 602. By driving the gear 602 to rotate through the driving motor 601, the second treatment barrel 4 is driven to rotate to achieve centrifugal separation. A liquid outlet 402 is opened at the bottom of the second treatment barrel 4. The discharge and filtration mechanism 7 includes a discharge pipe 701, a baffle 702, a liquid inlet hole 703, and a connecting pipe 707. The discharge pipe 701 is slidably installed inside the liquid outlet 402. The baffle 702 is fixedly connected to the top of the discharge pipe 701. The liquid inlet hole 703 is opened on the outer wall of the discharge pipe 701. The connecting pipe 707 is fixedly connected to the bottom of the discharge pipe 701. The discharge pipe 701 is used to control the discharge of the liquid. The baffle 702 plays a role of blocking and sealing. The liquid inlet hole 703 controls the channel for the liquid to flow out. The connecting pipe 707 is used to connect the subsequent filtering components. The discharge and filtration mechanism 7 further includes a sealing cover 708, an activated carbon filtration layer 709, and an anhydrous sodium sulfate layer 710. The sealing cover 708 is threadedly installed at the bottom of the connecting pipe 707. The activated carbon filtration layer 709 and the anhydrous sodium sulfate layer 710 are movably installed inside the sealing cover 708.The activated carbon filter layer 709 is located on top of the anhydrous sodium sulfate layer 710. Seal 708 ensures the tightness of the filtration process. The activated carbon filter layer 709 and the anhydrous sodium sulfate layer 710 respectively adsorb impurities and dehydrate the oil.

[0043] The collection mechanism 5 further includes a water inlet pipe 503, a cooling pipe 504, and a water outlet pipe 505. The water inlet pipe 503 is fixedly installed inside the first housing 1. The cooling pipe 504 is fixedly connected to the water outlet end of the water inlet pipe 503. The water outlet pipe 505 is fixedly connected to the water outlet end of the cooling pipe 504. Both the water inlet pipe 503 and the water outlet pipe 505 penetrate through the first housing 1. The water inlet pipe 503, the cooling pipe 504, and the water outlet pipe 505 are all located on top of the condenser pipe 501 and are in contact with the top of the condenser pipe 501. The water inlet pipe 503 introduces cooling water, the cooling pipe 504 cools the steam, and the water outlet pipe 505 discharges the cooled water. This circulating cooling method ensures the condensation effect.

[0044] The centrifugal mechanism 6 further includes a mounting ring 604, a roller 605, and a support ring 606. The mounting ring 604 is fixedly connected to the inner wall of the second housing 2. There are multiple rollers 605 annularly and movably installed inside the mounting ring 604. The outer wall of the second processing barrel 4 is fixedly connected to the support ring 606. The bottom of the support ring 606 is in contact with the outer wall of the roller 605. The cooperation of the mounting ring 604, the roller 605, and the support ring 606 makes the second processing barrel 4 more stable during rotation, reducing shaking and friction.

[0045] The discharge filtering mechanism 7 further includes a round cover 704, a spring 705, and a guide shaft 706. The round cover 704 is fixedly connected to the outer wall of the discharge pipe 701. A spring 705 is fixedly installed between the round cover 704 and the second processing barrel 4. There are multiple guide shafts 706 fixedly connected to the bottom of the second processing barrel 4. The guide shafts 706 penetrate through the inside of the round cover 704. The spring 705 provides elastic force to facilitate controlling the up and down movement of the discharge pipe 701. The guide shafts 706 ensure the stability and accuracy of the movement of the discharge pipe 701.

[0046] An annular glass two 401 is provided at the bottom of the outer wall of the second processing barrel 4, and an annular glass one 201 is provided at the bottom of the outer wall of the second housing 2. The two annular glasses facilitate the operator to observe the liquid stratification situation inside the second processing barrel 4.

[0047] A feed pipe one 8 is fixedly connected to the top of the first housing 1. The bottom of the feed pipe one 8 is fixedly connected to multiple feed pipes two 9 distributed annularly. The bottom of the feed pipes two 9 is fixedly connected to the top of the first processing barrel 3. The multiple feed pipes two 9 and the multiple condenser pipes 501 are staggered. This design enables the raw materials to enter the first processing barrel 3 evenly while not affecting the operation of the condenser pipe 501.

[0048] A slag discharge pipe 302 is fixedly connected to the bottom of the first treatment barrel 3. An electromagnetic valve is fixedly installed inside the slag discharge pipe 302. After the distillation is completed, the slag discharge pipe 302 is controlled by the electromagnetic valve to open, and the waste residue in the first treatment barrel 3 is discharged.

[0049] Support legs 11 are fixedly connected to the bottom of the second housing 2, and the support legs 11 ensure the overall stability of the device.

[0050] A purification process for peppermint oil uses a peppermint oil purification device according to any one of the above, and includes the following steps.

[0051] S1. Raw material pretreatment

[0052] The crushed peppermint stems and leaves and water are added to the first treatment barrel 3 through the first feed pipe 8 and the second feed pipe 9. The volume ratio of water to the raw material is 3:1. Crushing the raw material can increase the contact area with water and steam, improve the extraction efficiency, and heat the first treatment barrel 3 to 100 °C through the heating wire 10 to make it boil, which can generate enough steam to carry the peppermint oil molecules to volatilize, and the steam carries the peppermint oil molecules to rise.

[0053] S2. Steam condensation

[0054] The steam enters the condensing pipe 501 through the exhaust port 301. The cooling pipe 504 is supplied with cooling water. After the steam enters the condensing pipe 501, it exchanges heat with the cooling pipe 504. The steam is liquefied when it meets the cold, and the oil-water mixture flows into the second treatment barrel 4 along the drain pipe 502 under the action of gravity.

[0055] S3. Centrifugal separation

[0056] Then, the driving motor 601 drives the gear 602 to engage with the toothed ring 603, so that the second treatment barrel 4 rotates at a high speed. The water phase with a large density is thrown to the barrel wall, and the oil phase with a small density is located in the middle, realizing rapid stratification.

[0057] S4. Stratification observation

[0058] Push the round cover 704 upward to expose the liquid inlet hole 703. The oil-water mixture is discharged through the discharge pipe 701. Observe the position of the oil layer through the first annular glass 201 and the second annular glass 401. When the water phase is basically discharged, stop pushing the round cover 704 to prevent excessive water from mixing into the oil phase.

[0059] S5. Refining treatment

[0060] After the liquid is drained, a sealing cover 708 is installed at the bottom of the connecting pipe 707. The oil is sequentially adsorbed by impurities through the activated carbon filter layer 709 and dehydrated by the anhydrous sodium sulfate layer 710 to obtain refined peppermint oil. Installing the sealing cover ensures the sealing of the filtration process. The activated carbon adsorbs impurities in the oil, and the anhydrous sodium sulfate absorbs moisture, thereby improving the purity of the peppermint oil.

[0061] Working principle: First, the crushed mint stems and leaves and water are added to the first processing barrel 3 through the first feed pipe 8 and the second feed pipe 9 at a volume ratio of 3:1. The electric heating wire 10 is heated to 100 °C to boil the raw materials. The generated steam carries menthol oil molecules and enters the condenser tube 501 through the exhaust port 301. At the same time, cooling water is introduced through the water inlet pipe 503, and the condenser tube 501 is cooled by the cooling tube 504. The steam is cooled and liquefied to form an oil-water mixture, which automatically flows into the liquid inlet 403 of the second processing barrel 4 along the drain pipe 502, completing the distillation and condensation process.

[0062] Then, the drive motor 601 is started, and the second processing barrel 4 is driven to rotate at a high speed through the meshing of the gear 602 and the gear ring 603. Under the action of centrifugal force, the menthol oil with a smaller density floats up, and the water with a larger density sinks, realizing rapid stratification. The stratification interface can be clearly observed through the first annular glass 201 and the second annular glass 401.

[0063] Next, the round cover 704 is pushed upward, the spring 705 is compressed, and the liquid inlet hole 703 on the drain pipe 701 is exposed. First, the lower-layer water is discharged. When it is observed that the oil layer reaches the position of the liquid inlet hole 703, the round cover 704 is released, and the spring 705 returns to its original position to seal the liquid outlet 402 with the baffle 702, stopping the liquid discharge. Subsequently, a sealing cover 708 is installed at the bottom of the connecting pipe 707. The upper-layer oil liquid is adsorbed with pigments and impurities through the activated carbon filter layer 709, and the residual water is removed through the anhydrous sodium sulfate layer 710, finally obtaining high-purity menthol oil. The impurities and waste water are discharged through the slag discharge pipe 302 and the drain pipe 701 respectively.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification device for peppermint oil, comprising an outer shell one (1), the bottom of the outer shell one (1) is bolted with an outer shell two (2), a treatment barrel one (3) is fixedly installed inside the outer shell one (1), and a treatment barrel two (4) is movably installed inside the outer shell two (2), characterized in that: A collection mechanism (5) is installed between the outer shell one (1) and the processing barrel one (3), a centrifugal mechanism (6) is installed between the outer shell two (2) and the processing barrel two (4), a plurality of heating wires (10) are fixedly installed inside the processing barrel one (3), and a discharge and filtering mechanism (7) is installed at the bottom of the processing barrel two (4); An exhaust port (301) is opened at the top of the processing barrel one (3). The collection mechanism (5) includes a condensation pipe (501) and a liquid discharge pipe (502). A plurality of the condensation pipes (501) are fixedly connected in a ring shape to the outer wall of the processing barrel one (3). The intake ends of the plurality of condensation pipes (501) are fixedly connected to the exhaust port (301), and the exhaust ends of the plurality of condensation pipes (501) are fixedly connected to a liquid discharge pipe (502); A liquid inlet (403) is fixedly connected to the top of the processing barrel two (4), and the position of the liquid inlet (403) corresponds to that of the liquid discharge pipe (502). The centrifugal mechanism (6) includes a driving motor (601), a gear (602), and a toothed ring (603). The driving motor (601) is fixedly installed on the inner wall of the outer shell two (2), the gear (602) is fixedly installed on the output end of the driving motor (601), the toothed ring (603) is fixedly connected to the outer wall of the processing barrel two (4), and the toothed ring (603) meshes with the gear (602); A liquid outlet (402) is opened at the bottom of the processing barrel two (4). The discharge and filtering mechanism (7) includes a discharge pipe (701), a baffle (702), a liquid inlet hole (703), and a connecting pipe (707). The discharge pipe (701) is slidably installed inside the liquid outlet (402), the baffle (702) is fixedly connected to the top of the discharge pipe (701), the liquid inlet hole (703) is opened on the outer wall of the discharge pipe (701), and the connecting pipe (707) is fixedly connected to the bottom of the discharge pipe (701); The discharge and filtering mechanism (7) further includes a sealing cover (708), an activated carbon filtering layer (709), and an anhydrous sodium sulfate layer (710). The sealing cover (708) is threadedly installed at the bottom of the connecting pipe (707). An activated carbon filtering layer (709) and an anhydrous sodium sulfate layer (710) are movably installed inside the sealing cover (708), and the activated carbon filtering layer (709) is located on top of the anhydrous sodium sulfate layer (710).

2. The purification device for peppermint oil according to claim 1, wherein: The collection mechanism (5) further includes a water inlet pipe (503), a cooling pipe (504), and a water outlet pipe (505). The water inlet pipe (503) is fixedly installed inside the outer shell one (1), the cooling pipe (504) is fixedly connected to the water outlet end of the water inlet pipe (503), the water outlet pipe (505) is fixedly connected to the water outlet end of the cooling pipe (504). Both the water inlet pipe (503) and the water outlet pipe (505) penetrate through the outer shell one (1). The water inlet pipe (503), the cooling pipe (504), and the water outlet pipe (505) are all located on top of the condensation pipe (501) and are in contact with the top of the condensation pipe (501).

3. The purification device for peppermint oil according to claim 1, characterized in that: The centrifugal mechanism (6) further comprises a mounting ring (604), a roller (605) and a support ring (606); the mounting ring (604) is fixedly connected to the inner wall of the second outer shell (2); the roller (605) has a plurality of annular movably mounted inside the mounting ring (604); the outer wall of the second processing barrel (4) is fixedly connected to the support ring (606); the bottom of the support ring (606) is in contact with the outer wall of the roller (605).

4. The purification device for peppermint oil according to claim 1, wherein: The discharge filtering mechanism (7) further comprises a circular cover (704), a spring (705) and a guide shaft (706); the circular cover (704) is fixedly connected to the outer wall of the discharge pipe (701); a spring (705) is fixedly installed between the circular cover (704) and the second processing barrel (4); the guide shaft (706) has a plurality of portions fixedly connected to the bottom of the second processing barrel (4); and the guide shaft (706) passes through the interior of the circular cover (704).

5. The purification device for peppermint oil according to claim 1, wherein: The bottom of the outer wall of the second processing barrel (4) is provided with an annular glass (401), and the bottom of the outer wall of the second shell (2) is provided with an annular glass (201).

6. The purification device for peppermint oil according to claim 1, characterized in that: The top of the shell one (1) is fixedly connected to a feed pipe one (8), the bottom of the feed pipe one (8) is fixedly connected to a plurality of feed pipes two (9) distributed in a ring shape, the bottom of the feed pipe two (9) is fixedly connected to the top of the treatment barrel one (3), and the plurality of feed pipes two (9) are staggeredly distributed with a plurality of condensation pipes (501).

7. The purification device for peppermint oil according to claim 1, characterized in that: The bottom of the processing barrel (3) is fixedly connected with a slag discharge pipe (302), and a solenoid valve is fixedly installed inside the slag discharge pipe (302).

8. The purification device for peppermint oil according to claim 1, wherein: The bottom of the second housing (2) is fixedly connected with a supporting leg (11).

9. A purification process of peppermint oil, characterized in that: The device for purifying peppermint oil according to any one of claims 1 to 8 comprises the following steps: S1. Raw material pretreatment Adding mint stem and leaf shreds and water into treatment barrel one (3) through feed pipe one (8) and feed pipe two (9), wherein the volume ratio of water to raw material is 3:1, and heating treatment barrel one (3) to 100°C through electric heating wire (10) to make it boil, and steam carries mint oil molecules upward; S2, Steam condensation The steam enters the condenser (501) through the exhaust port (301), and cooling water is introduced into the cooling pipe (504) to liquefy the steam to form an oil-water mixture, which then flows into the second treatment barrel (4) through the drain pipe (502); S3. Centrifugal separation Next, the driving motor (601) drives the gear (602) to mesh with the gear ring (603), causing the second processing barrel (4) to rotate at a high speed, and utilizes centrifugal force to separate the oil and water; S4. Stratified observation Push the round cover (704) upward to expose the liquid inlet (703), and the oil-water mixture is discharged through the discharge pipe (701), and the position of the oil layer is observed through the annular glass 1 (201) and the annular glass 2 (401); S5. Refining treatment After the liquid is drained, a sealing cover (708) is installed at the bottom of the connecting pipe (707), and the oil passes through the activated carbon filter layer (709) to adsorb impurities and the anhydrous sodium sulfate layer (710) to dehydrate, thereby obtaining refined peppermint oil.

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