Device for extracting green cardamom essential oil

Abstract

The utility model discloses an extraction device for green cardamom essential oil, relates to the technical field of essential oil extraction, and solves the problems that an oil-water separator used during essential oil extraction in the prior art cannot accurately discharge oil liquid, and the yield is low or the purity is low. The device comprises a distiller, the distiller is connected with a condenser, the condenser is connected with a separator, the separator comprises a first-stage separation cylinder connected with a condensation outlet of the condenser, the lower end of the first-stage separation cylinder is connected with a second-stage separation cylinder, and the side wall of the first-stage separation cylinder and the side wall of the second-stage separation cylinder are each provided with an oil discharge assembly and an oil discharge pipe. The diameter of the primary separation cylinder is greater than that of the secondary separation cylinder. By arranging the first-stage separation barrel, first-stage oil-water separation can be carried out, a small amount of remaining oil liquid is discharged into the second-stage separation barrel with a small diameter for separation, so that the separation difficulty is reduced, the separation precision is improved, and the influence of hydrolat on the purity and yield of the oil liquid in the separation process is reduced in a manner of reducing the contact area of the oil liquid and hydrolat.

Description

Technical Field

[0001] This utility model relates to the field of essential oil extraction technology, and in particular to an extraction device for cardamom essential oil. Background Technology

[0002] Cardamom, also known as small cardamom, triangular cardamom, and Indian cardamom, has seeds with a strong aroma and spicy flavor. Common extraction methods for cardamom essential oil include steam distillation and organic solvent extraction. Steam distillation is widely used due to its low equipment cost and simple operation.

[0003] In the process of extracting cardamom essential oil by distillation, the extraction of conventional plant essential oils requires the crude essential oil to be left to stand and separate into higher purity essential oil and hydrosol, a byproduct of essential oil. During the standing separation, an oil-water separator is needed. A traditional oil-water separator is like using a "bucket" to collect the essential oil. Since the density of oil is less than that of hydrosol, the essential oil floats on top of the hydrosol, forming a distinct upper and lower layer of essential oil and hydrosol. The extraction of essential oil is completed by removing the upper layer of essential oil. However, water is easily mixed into the essential oil during the extraction process, which affects the water content of the essential oil.

[0004] For example, Chinese utility model patent CN220846010U discloses an oil-water separator for essential oil extraction, including a cylindrical body, which is vertically arranged; a cover plate, which is disposed at the upper and lower ends of the cylindrical body for sealing the cylindrical body; a fixing member, which is a screw, connected to the cover plate, forming a container between the cover plate and the cylindrical body; and a low-temperature extraction device, which includes an upper electrode plate and a lower electrode plate disposed on the outside of the cover plate, which are correspondingly arranged and parallel to each other. The upper electrode plate is disposed on the upper end face of the cover plate and is fixedly connected to the cover plate, and the lower electrode plate is disposed on the lower end face of the cover plate below and is fixedly connected to the cover plate. Both the upper and lower electrode plates are connected to an electric field generator through circuits. The advantages are that it can not only realize oil-water separation during the extraction process of essential oil, but also accelerate oil-water separation, improve working efficiency, and improve separation quality.

[0005] However, the diameter of the oil-water separator in the existing solution is fixed. When the upper layer of essential oil is discharged to a small amount, the oil layer is thin. The existing oil-water separator is difficult to accurately separate and discharge the remaining essential oil from the hydrosol. It is easy for hydrosol to be mixed in during discharge, resulting in low purity, or a small amount of remaining oil cannot be completely discharged. For the essential oil extraction process, which has a low yield, this can easily lead to waste and low productivity. Utility Model Content

[0006] To address the shortcomings in the aforementioned background technology, this utility model proposes an extraction device for cardamom essential oil, which solves the problem that the oil-water separator used in the prior art cannot accurately discharge the oil, easily resulting in low yield or low purity.

[0007] The technical solution of this utility model is implemented as follows: A device for extracting cardamom essential oil includes a distiller connected to a condenser, and the condenser connected to a separator. The separator includes a primary separator connected to the condensation outlet of the condenser, and a secondary separator connected to the lower end of the primary separator. Both the primary separator and the secondary separator are provided with oil discharge components and oil discharge pipes on their side walls. The diameter of the primary separator is larger than the diameter of the secondary separator.

[0008] Preferably, both the primary and secondary separation cylinders include a cylinder body. A three-way connector I is connected to the bottom of the primary separation cylinder body. One port of the three-way connector I is connected to a drain pipe I, and the other port is connected to the inlet of the secondary separation cylinder via a pipe. An inlet is provided at the top of the cylinder body, and a drain pipe II is connected to the bottom of the secondary separation cylinder. Valves are provided on the oil drain pipe, drain pipe I, drain pipe II, and the pipe.

[0009] Preferably, the oil discharge assembly includes a guide groove disposed on the side wall of the cylinder, the guide groove communicating with the interior of the cylinder, an oil discharge pipe connected to the bottom of the guide groove, a piston slidably disposed within the guide groove, the piston cooperating with a guide post passing through the guide groove, the guide post driving the piston to slide along the guide groove, thereby closing or opening the inlet of the oil discharge pipe. A handle is provided at the outer end of the guide post.

[0010] Preferably, the guide groove is provided with a threaded hole, the guide post is provided with an external thread, and the external thread rotatably engages with the threaded hole. A rotating block is fixedly provided at the end of the guide post, and the rotating block engages with the piston.

[0011] Preferably, the lower part of the cylinder is provided with a conical guide section, and the upper part of the cylinder is provided with a top cover, which is bolted to the cylinder, and a sealing ring is provided between the top cover and the cylinder. Liquid level observation windows are provided on the side walls of the cylinder.

[0012] Preferably, the condenser includes a condenser tank, a spiral tube is fixedly installed inside the condenser tank, the bottom of the spiral tube extends out of the condenser tank and the lower end is provided with a three-way connector II, one port of the three-way connector II is connected to the first-stage separation cylinder and the other port is connected to the distiller; the top of the spiral tube is connected to the distiller through a connecting pipe; the condenser tank is filled with cold water and is provided with a water inlet pipe and a water outlet pipe.

[0013] The distiller includes an evaporator, a grid plate in the middle of the evaporator, a heating wire in the evaporator below the grid plate, a feed cover on the side wall of the evaporator above the grid plate, an outlet pipe at the top of the evaporator connected to a three-way connector II, a return port on the side wall of the evaporator connected to a connecting pipe, and an exhaust valve at the top of the evaporator.

[0014] The beneficial effects of this invention are as follows: First-stage oil-water separation is achieved by setting up a primary separation cylinder. The remaining small amount of oil is then discharged into a smaller-diameter secondary separation cylinder for further separation. This reduces the contact area between the oil and the hydrosol, lowering the separation difficulty, improving separation accuracy, and minimizing the impact of the hydrosol on the oil purity and yield during the separation process. The distiller enables the extraction of cardamom essential oil via distillation, and the condenser provides a mixture of essential oil and hydrosol, which is then refluxed back into the primary separation cylinder for further separation. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the separator structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the oil draining assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the condenser of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the distillation apparatus of this utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the secondary separation cylinder of this utility model;

[0022] In the diagram: 1: Distiller, 2: Condenser, 3: Separator, 4: Primary separation cylinder, 5: Secondary separation cylinder, 6: Oil drain assembly, 7: Oil drain pipe, 8: Cylinder body, 9: T-connector I, 10: Liquid inlet, 11: Pipe, 12: Valve, 13: Guide channel, 14: Piston, 15: Guide column, 16: Handle, 17: Rotating block, 18: Conical guide section, 19: Top cover, 20: Liquid level observation window, 21: Condenser, 22: Spiral tube, 23: T-connector II, 24: Water inlet pipe, 25: Water outlet pipe, 26: Evaporator, 27: Grid plate, 28: Heating wire, 29: Feed cover, 30: Gas outlet pipe, 31: Gas return port, 32: Exhaust valve, 33: Liquid drain pipe I, 34: Liquid drain pipe II, 66: Connecting pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , 2 As shown in Example 1, an extraction device for cardamom essential oil includes a distiller 1 connected to a condenser 2, which in turn is connected to a separator 3. The distiller allows for the extraction of cardamom essential oil via distillation, and the condenser, in conjunction with the distiller, yields a mixture of essential oil and hydrosol, which is then refluxed into the separator for further separation. The separator 3 includes a primary separator 4 connected to the condenser outlet of the condenser 2, and a secondary separator 5 connected to its lower end. Both the primary and secondary separators have oil discharge components 6 and oil discharge pipes 7 on their side walls. The diameter of the primary separator 4 is larger than that of the secondary separator 5. By using the primary separator, first-stage oil-water separation is achieved. The remaining small amount of oil is discharged into the smaller-diameter secondary separator for further separation, reducing the contact area between the oil and the hydrosol, thus lowering the separation difficulty, improving separation accuracy, and minimizing the impact of the hydrosol on the purity and yield of the oil during the separation process.

[0025] Specifically in this embodiment, such as Figure 2 , 6As shown, both the primary separation cylinder 4 and the secondary separation cylinder 5 include a cylinder body 8. A three-way connector I9 is ​​connected to the bottom of the cylinder body 8 of the primary separation cylinder 4. One port of the three-way connector I9 is ​​connected to the drain pipe I33, and the other port is connected to the inlet 10 of the secondary separation cylinder 5 via a pipe 11. An inlet 10 is located at the top of the cylinder body 8, and a drain pipe II34 is connected to the bottom of the secondary separation cylinder 5. Drain pipes I33 and II34 are used to discharge the lower layer of hydrosol. Valves 12 are installed on the oil drain pipe 7, drain pipes I33, drain pipe II34, and pipe 11. In this embodiment, the valves can be conventional manual valves or solenoid valves to achieve on / off control. In this embodiment, the condenser is positioned higher than the primary separation cylinder, and the primary separation cylinder is positioned higher than the secondary separation cylinder, thereby facilitating liquid flow.

[0026] In this embodiment, the cardamom raw material is first added to a still for steam distillation. The product is condensed in a condenser and then flows into the primary separator. When the liquid level in the primary separator is high, the valve on drain pipe II 34 is opened to drain the lower layer of hydrosol until the top of the hydrosol is slightly below the oil drain assembly 6. Then, the upper layer of essential oil is drained through drain pipe 7 using the oil drain assembly. After most of the essential oil layer has been drained, the oil drain assembly is closed, and the valve on pipe 11 is opened to drain the remaining liquid into the secondary separator. After the oil and hydrosol have separated, the valve on drain pipe II 34 of the secondary separator is used to drain the lower layer of hydrosol until the top of the hydrosol is slightly below the oil drain assembly 6. Then, the upper layer of essential oil is drained through drain pipe 7 using the oil drain assembly. Finally, the lower layer of hydrosol is completely drained through drain pipe II 34, reducing the impact of inaccurate separation process on the purity and yield of the oil.

[0027] Specifically, in this embodiment, the diameter of the secondary separation cylinder is five times that of the primary separation cylinder. Since the diameter of the secondary separation cylinder is much smaller than that of the primary separation cylinder, the liquid surface area becomes smaller and the liquid level becomes higher after the residual liquid from the primary separation cylinder flows into the secondary separation cylinder. This reduces the area at the junction of the hydrous layer and the oil layer, thereby reducing the overall volume of liquid in the junction area, reducing the amount of separation, and reducing waste and incomplete separation.

[0028] Example 2, based on Example 1, such as Figure 3As shown, the oil discharge assembly 6 includes a guide groove 13 disposed on the side wall of the cylinder 8. The guide groove 13 communicates with the interior of the cylinder 8. The oil discharge pipe 7 is connected to the bottom of the guide groove 13. A piston 14 is slidably disposed inside the guide groove 13. The piston 14 cooperates with a guide post 15 passing through the guide groove 13. The guide post 15 drives the piston 14 to slide along the guide groove 13, which can close or open the inlet of the oil discharge pipe 7. Specifically, in this embodiment, the guide groove is a rectangular groove, the piston is a rectangular piston, and the piston sidewall is provided with a rubber ring, which can fit against the inner wall of the guide groove to achieve a seal. The guide post is horizontally arranged, and the bottom surface of the guide groove is a horizontal plane, which is conducive to stable oil flow.

[0029] As a further specific embodiment, a handle 16 is fixedly provided at the outer end of the guide post 15. A threaded hole is provided on the guide groove 13, and an external thread is provided on the guide post 15, which engages with the threaded hole through the external thread. A rotating block 17 is fixedly provided at the end of the guide post 15, and it rotatably engages with the piston 14 through the rotating block 17. The rotating block is a stepped cylindrical block, and a stepped circular hole is provided on the piston to allow the rotating block to rotate, thereby achieving the rotatable engagement between the rotating block and the piston. When it is necessary to discharge oil, the handle is turned, causing the handle to rotate, thereby achieving axial movement under the threaded engagement. When the guide post moves, it pulls the piston to move to the outer end of the guide groove or pushes the piston inward. The inlet of the oil discharge pipe is opened on the bottom wall of the guide groove, and the lateral movement of the piston opens or closes the oil discharge pipe inlet.

[0030] In addition, as a further specific embodiment, the lower part of the cylinder 8 is provided with a conical guide section 18 to facilitate the drainage of liquid. The upper part of the cylinder 8 is provided with a top cover 19, which is bolted to the cylinder 8, and a sealing ring is provided between the top cover 19 and the cylinder 8. The top cover facilitates cleaning of the inside of the cylinder after long-term use. Each side wall of the cylinder 8 is provided with a liquid level observation window 20. The liquid level observation window can be an elongated orifice opened on the side wall of the cylinder, and the orifice is sealed with a transparent plate to facilitate observation of the liquid level inside the cylinder.

[0031] Example 3, based on Example 2, such as Figure 4As shown, the condenser 2 includes a condenser tank 21, inside which a spiral tube 22 is fixedly installed. The bottom of the spiral tube 22 extends out of the condenser tank 21 and has a three-way connector II 23 at its lower end. One port of the three-way connector II 23 is connected to the primary separation cylinder 4, and the other port is connected to the distiller 1. The top of the spiral tube 22 is connected to the distiller 1 through a connecting pipe 66. The condenser tank 21 is filled with cold water, and has an inlet pipe 24 and an outlet pipe 25. In actual use, the inlet pipe and outlet pipe are connected to a water pump and a water storage tank, respectively. The suction port of the water pump is connected to the water tank, so that during operation, the water pump can draw cold water from the water storage tank and pump it into the condenser tank to cool the spiral tube of the condenser tank. This causes the mixed vapor of oil and hydrosol inside the spiral tube to condense and flow downwards into the primary separation cylinder. The cold water in the condenser tank absorbs heat and is then sent back to the water storage tank through the outlet pipe. Further, heat dissipation fins are installed on the water storage tank to dissipate heat from the water in the tank.

[0032] Example 4, based on Example 3, such as Figure 5 As shown, the distiller 1 includes an evaporator 26. A grid plate 27 is provided in the middle of the evaporator 26. A heating wire 28 is provided inside the evaporator 26 below the grid plate 27. A feed cover 29 is provided on the side wall of the evaporator 26 above the grid plate 27. In this embodiment, the side wall of the evaporator has an opening, and the feed cover is bolted to the opening. An exhaust pipe 30 is provided at the top of the evaporator 26, and the exhaust pipe 30 is connected to one port of a three-way connector II 23. A return air port 31 is provided on the side wall of the evaporator 26, and the return air port 31 is connected to a connecting pipe 66. An exhaust valve 32 is provided at the top of the evaporator 26, and a water inlet pipe is provided on the side wall of the evaporator. The water inlet pipe is connected to a clean water pipe on site, thereby allowing water to enter the evaporator.

[0033] In practical use, the feed cover is opened, and the cardamom raw material is placed on the grid plate inside the evaporator. Water is then supplied to the evaporator, and the water is heated to boiling using a heating wire to generate steam. The steam passes through the cardamom raw material on the grid plate, extracting the essential oil and forming a steam mixture. This mixture is then discharged through the top vent pipe, condensed in the condenser, and falls into the primary separation cylinder. The partially condensed steam mixture flows back into the steam tank through the connecting pipe and return port, participating in subsequent distillation. When the internal pressure of the device exceeds the threshold of the exhaust valve, the exhaust valve automatically opens to release pressure and exhaust gas.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An extraction apparatus for cardamom essential oil, comprising a distiller (1), the distiller (1) being connected to a condenser (2), the condenser (2) being connected to a separator (3), characterized in that: The separator (3) includes a primary separator (4) connected to the condenser outlet of the condenser (2), and a secondary separator (5) connected to the lower end of the primary separator (4). Both the primary separator (4) and the secondary separator (5) are provided with an oil drain assembly (6) and an oil drain pipe (7) on their side walls. The diameter of the primary separator (4) is larger than that of the secondary separator (5).

2. The apparatus for extracting cardamom essential oil according to claim 1, characterized in that: Both the primary separation cylinder (4) and the secondary separation cylinder (5) include a cylinder body (8). The bottom of the cylinder body (8) of the primary separation cylinder (4) is connected to a three-way connector I (9). One port of the three-way connector I (9) is connected to the drain pipe I (33), and the other port is connected to the inlet (10) of the secondary separation cylinder (5) through the pipe (11). The top of the cylinder body (8) is provided with an inlet (10), and the bottom of the secondary separation cylinder (5) is connected to a drain pipe II (34).

3. The apparatus for extracting cardamom essential oil according to claim 2, characterized in that: Valves (12) are provided on the oil drain pipe (7), the liquid drain pipe I (33), the liquid drain pipe II (34) and the pipeline (11).

4. The apparatus for extracting cardamom essential oil according to claim 3, characterized in that: The oil discharge assembly (6) includes a guide groove (13) provided on the side wall of the cylinder (8). The guide groove (13) is connected to the inside of the cylinder (8). The oil discharge pipe (7) is connected to the bottom of the guide groove (13). A piston (14) is slidably provided in the guide groove (13). The piston (14) cooperates with the guide post (15) passing through the guide groove (13). The guide post (15) drives the piston (14) to slide along the guide groove (13), which can close or open the inlet of the oil discharge pipe (7).

5. The apparatus for extracting cardamom essential oil according to claim 4, characterized in that: The guide post (15) is provided with a handle (16) at its outer end.

6. The apparatus for extracting cardamom essential oil according to claim 5, characterized in that: The guide groove (13) is provided with a threaded hole, the guide post (15) is provided with an external thread, and the external thread cooperates with the threaded hole. The end of the guide post (15) is fixedly provided with a rotating block (17), and the rotating block (17) cooperates with the piston (14) in rotation.

7. The apparatus for extracting cardamom essential oil according to claim 6, characterized in that: The lower part of the cylinder (8) is provided with a conical guide section (18), and the upper part of the cylinder (8) is provided with an upper cover (19). The upper cover (19) is bolted to the cylinder (8), and a sealing ring is provided between the upper cover (19) and the cylinder (8).

8. The apparatus for extracting cardamom essential oil according to claim 7, characterized in that: The side walls of the cylinder (8) are all provided with liquid level observation windows (20).

9. The apparatus for extracting cardamom essential oil according to any one of claims 1 to 8, characterized in that: The condenser (2) includes a condenser tank (21), a spiral tube (22) is fixedly installed inside the condenser tank (21), the bottom of the spiral tube (22) extends out of the condenser tank (21) and the lower end is provided with a three-way connector II (23), one port of the three-way connector II (23) is connected to the first-stage separation cylinder (4) and the other port is connected to the distiller (1); the top of the spiral tube (22) is connected to the distiller (1) through a connecting pipe (66); the condenser tank (21) is filled with cold water, and the condenser tank (21) is provided with a water inlet pipe (24) and a water outlet pipe (25).

10. The apparatus for extracting cardamom essential oil according to claim 9, characterized in that: The distiller (1) includes an evaporator (26), a grid plate (27) is provided in the middle of the evaporator (26), a heating wire (28) is provided in the evaporator (26) below the grid plate (27), a feed cover (29) is provided on the side wall of the evaporator (26) above the grid plate (27), an exhaust pipe (30) is provided at the top of the evaporator (26), the exhaust pipe (30) is connected to a three-way connector II (23), a return air port (31) is provided on the side wall of the evaporator (26), the return air port (31) is connected to a connecting pipe (66); an exhaust valve (32) is provided at the top of the evaporator (26).

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