A supercritical carbon dioxide extraction apparatus

Abstract

The present application relates to carbon dioxide extraction equipment technical field, specifically to a kind of supercritical carbon dioxide extraction equipment, including shell, filler port, extraction zone, separation zone, material taking port, support leg, extraction mechanism and separation mechanism;Shell is cylindrical cylinder and is placed on ground by support leg, filler port is arranged in the lateral wall of shell and is communicated with extraction zone, the upper half of shell is extraction zone, the lower half of shell is separation zone and lateral wall is provided with material taking port;Extraction mechanism is installed in extraction zone;Separation mechanism is installed in separation zone;The present application integrates the crushing step and the dissolving step in the extraction process, and then dissolves while crushing the herbal plant, compared with the traditional supercritical extraction method, greatly improves the extraction efficiency of herbal essential oil, and after dissolving herbal essential oil, it can directly enter the separation zone under the sliding of sliding roller, so as to realize process extraction, improve the extraction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon dioxide extraction equipment, and particularly relates to a supercritical carbon dioxide extraction equipment. BACKGROUND

[0002] The supercritical carbon dioxide extraction equipment is a high-efficiency technology for extracting compounds from plant materials. In this process, carbon dioxide is adjusted to a supercritical state, i.e., a high-pressure high-temperature state, so that it has the characteristics of both liquid and gas; the supercritical fluid extraction technology uses CO2 as a solvent, the main reason is that the extraction temperature is low, and the product will not be volatile. And by precisely controlling the temperature and pressure, selective extraction is carried out, and there is no residual solvent in the product after extraction.

[0003] In the current stage, before supercritical extraction of plants, the substance to be extracted needs to be mixed with supercritical carbon dioxide, and then the supercritical carbon dioxide is kept in a liquid state by temperature control until it is moved to a separated position, and then the temperature is increased to make the carbon dioxide change into a gaseous state, at this time the extracted substance will stay in the separated area; in the extraction process of herbal plants such as rhizoma atractylodis, honeysuckle, aconite, wormwood and su leaf, the herbal plants need to be crushed first, because the cell structure is destroyed, the essential oil is released in the crushing stage, but the supercritical carbon dioxide is a relatively closed space, after crushing, the crushed plants need to be transported into the supercritical carbon dioxide extraction equipment, and in the transportation process, volatile components will be lost, resulting in reduced yield.

[0004] In order to solve these problems and improve the extraction efficiency of herbal essential oil, the present application provides a supercritical carbon dioxide extraction equipment to solve the problems. SUMMARY

[0005] The technical problem to be solved by the present application is that in the supercritical carbon dioxide extraction of some herbal plants, in order to ensure the extraction efficiency, the plants need to be crushed in advance to release essential oil, but the supercritical carbon dioxide environment is relatively closed, the crushed plants need to be transported to the extraction equipment, so that the components volatilize in the transportation process, affecting the yield.

[0006] To solve the technical problem, the present application adopts the technical scheme: providing a supercritical carbon dioxide extraction equipment, comprising a shell, a filler port, an extraction zone, a separation zone, a material taking port, a supporting leg, an extraction mechanism and a separation mechanism; the shell is a cylindrical barrel and is placed on the ground through the supporting leg, the filler port is arranged on the side wall of the shell and communicates with the extraction zone, the upper half of the shell is the extraction zone, the lower half of the shell is the separation zone and the side wall is provided with the material taking port; the extraction mechanism is installed in the extraction zone, the extraction mechanism drives the rotating shaft to rotate around the transmission rod through the rotating force provided by the rotating motor, the sliding of the transmission rod drives the rotating disc to rotate and is limited by the limiting groove, and the herbal essential oil flows out of the extraction zone through the flow guide groove under the cooperation of the sliding roller crushing groove and the annular groove gap; the separation mechanism is installed in the separation zone, and the supercritical carbon dioxide slides into the flow guide groove from the inner wall of the annular groove under the action of gravity, and then the supercritical carbon dioxide is dispersed in the low-temperature state and slides into the gas collection bottle.

[0007] The extraction mechanism comprises a rotating motor, a partition plate, a transmission rod, a cross ring, a crushing assembly and a guide disc; the inside of the shell is provided with the partition plate, the upper end of the partition plate is provided with the rotating motor, the center shaft of the partition plate is connected with the transmission rod, and the transmission rod is connected with the output shaft of the rotating motor; the other end of the transmission rod is connected with the center shaft of the cross ring; the surface of the cross ring is provided with a through hole, the lower end of the cross ring is connected with the crushing assembly through the through hole, the inner diameter of the guide disc is the same as that of the partition plate, and the guide disc is connected to the lower end of the crushing assembly; the movement track of the center of the crushing assembly is a circle with the outer diameter of the cross ring.

[0008] The inside of the shell is provided with the partition plate, the inside of the shell is divided into the extraction zone and the outside through the partition plate, then the extraction zone in the inside of the shell is isolated alone in combination with the guide disc, and then the controllable air pressure is ensured to stabilize the supercritical state, the lower end of the guide disc is arranged as the separation zone, the herbal essential oil is dissolved through the supercritical carbon dioxide in the extraction zone, the supercritical carbon dioxide containing the herbal essential oil is guided to the integrated groove through the flow guide groove, the supercritical carbon dioxide containing the herbal essential oil can flow to the separation zone through the flow guide pipe due to the large solubility and low viscosity of the supercritical carbon dioxide, then enters the gas collection bottle under the action of the flow guide table, and then the carbon dioxide is converted into a gaseous state by adjusting the temperature, and the herbal essential oil stays in the gas collection bottle.

[0009] The rotating motor can drive the transmission rod to rotate by providing unidirectional rotating force, and the transmission rod is fixedly connected with the output shaft of the rotating motor, and then the rotating motor can drive the transmission rod to rotate, and then drive the cross ring to rotate, and the rotating shaft is rotatably connected to the side wall of the cross ring, so that the cross ring can provide tangential force for the rotating disc, in order to prevent jamming, the rotating shaft and the cross ring are rotatably connected through the through hole, and the crushing assembly can grind and crush herbal plants such as atractylodes rhizome, honeysuckle, yuzhu, eijiao and su leaf through the repeatedly moving sliding rollers.

[0010] The crushing assembly comprises a stop block, a rotating shaft, a rotating disc and a sliding roller; the rotating shaft is coaxially connected with the through hole, the stop block is connected to the upper end of the through hole, the other end of the rotating shaft is connected with the rotating disc, the rotating disc is provided in a five-edge shape and a hinge hole is arranged at each vertex of the five-edge shape; the side wall of the sliding roller is provided with a hinge shaft, and the hinge shaft is coaxially connected in the hinge hole; the sliding roller is provided as five, and the distance from the hinge shaft of the sliding roller to the two ends is equal, and the rotation angle of the sliding roller is 0°-360°.

[0011] The main purpose of the crushing assembly is to crush plants in combination with the guide disc, each sliding roller is limited to move in a fixed diameter direction through the limiting groove on the surface of the guide disc, and since five sliding rollers are arranged, the center of the circle where the hinge shaft of the sliding roller is located can move along a virtual circle path, and the virtual circle is coaxial with the guide disc. Since the paths of different sliding rollers are different when the sliding rollers slide, the hinge shaft of the sliding roller is rotatably connected with the hinge hole, and the rotation angle is set to 0°-360°, so that the rotating disc can continuously rotate.

[0012] The side wall of the sliding roller is provided with a rolling groove, the rolling groove is linearly arranged on the side wall of the sliding roller, and the two ends of the sliding roller are provided in a tapered shape; the rolling groove is truncated near the hinge shaft; the surface of the guide disc is annularly arranged with 10 limiting grooves, the limiting grooves extend outward along the radial direction of the guide disc to the side wall of the guide disc, the inner wall of the limiting groove is provided with an annular groove, the annular groove is linearly arranged along the radial direction of the guide disc, and the width of the recessed part of the annular groove is twice the width of the recessed part of the rolling groove; the bottom end inside the limiting groove is provided with a flow guide groove, and the flow guide groove communicates the innermost annular groove and the outermost annular groove.

[0013] The surface of the sliding roller is provided with a crushing groove, and the limiting groove is provided with an annular groove. The annular groove fits into the crushing groove, and the crushing groove fits into the sliding roller. Since the width of the recessed part of the annular groove is twice the width of the recessed part of the crushing groove, a tooth-like structure is formed. The sliding roller slides back and forth, repeatedly fitting into the annular groove, continuously crushing the herbal plants, causing the herbal essential oil to flow out and flow into the guide groove under the action of gravity. The structure with tapered ends is mainly intended to allow the plants to be inserted, so that the tapered structure can both hold the plants in place and reduce interference between adjacent sliding rollers during the sliding process. The limiting groove extends to the side wall of the guide plate, allowing the oil to flow into the guide tube through the guide groove.

[0014] The ratio of the maximum outer diameter of the arc-shaped recessed structure formed at the center of the ring array of limiting grooves to the length of the sliding roller is 5:6. Since the trajectory of the center of the rotating disk is a circle when it rotates, the sliding roller will not be too short during the sliding process by setting the length ratio of 5:6. Furthermore, due to the tapered structure at both ends of the sliding roller, this setting can stabilize the sliding roller within the guide disk.

[0015] The separation mechanism includes an integrated ring, a guide tube, a connecting tube, a collection bottle, and a lifting frame. The side wall of the housing is provided with an integrated ring, which has a hollow interior and its lower end is connected to the guide tube. Ten guide tubes are arranged in a ring array around the housing. The other end of each guide tube is connected to the separation zone. The collection bottle is installed at the lower end of the separation zone and is connected to the interior of the separation zone via a connecting tube. A lifting frame is installed at the lower end of the collection bottle. The number of guide tubes is 10, the same as the number of limiting grooves. Therefore, when the sliding roller slides, the herbal essential oil added through the filling port can be concentrated in the integrated ring and then enter the separation zone.

[0016] The sidewall of the shell extends into a cylindrical block, which communicates with the inner wall of the integrated ring. The cylindrical block is a hollow structure and contains a solenoid valve. A flow guide platform is connected inside the separation zone. A connection hole is provided at the central axis of the flow guide platform. The flow guide platform has a centrally recessed structure, and a connecting pipe is connected inside the connection hole. To prevent gas leakage or pressure changes in the supercritical state, a solenoid valve is provided. The opening and closing of the solenoid valve can be manually controlled during pressurization and heating, thereby ensuring the stability of the gas pressure in the extraction zone and the separation zone.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The present application integrates the crushing step and the dissolving step in the extraction process by designing a device with synchronous extraction mechanism and separation mechanism, thereby realizing the dissolution while crushing the herbal plants, greatly improving the extraction efficiency of the herbal essential oil compared with the traditional supercritical extraction method, and after dissolving the herbal essential oil, the herbal essential oil can directly enter the separation zone under the sliding of the sliding roller, thereby realizing the flow extraction and improving the extraction efficiency.

[0019] 2. The present application designs the connection mode of the cross ring and the sliding roller, controls the movement track of the center of the cross ring through the pentagonal cross ring, makes the circular movement track circular, and thereby makes the moving distance of the sliding roller in each direction the same, so that the herbal plants can be maximally crushed after being put in, thereby ensuring the precipitation of the essential oil.

[0020] 3. The present application designs the annular groove matched with the rolling groove, so that the plant essential oil can be precipitated when the herbal plants are put into the extraction zone through the relative movement of the sliding roller and the limiting groove in the repeated sliding process of the sliding roller, and the crushing process can continue with the rotation of the rotating motor, thereby improving the extraction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] The above and other aspects of the present application will now be described in greater detail by way of example only with reference to the accompanying drawings in which:

[0023] Figure 1 is the overall schematic diagram of the present application;

[0024] Figure 2 is the overall cross-sectional view of the present application;

[0025] Figure 3 is the internal installation schematic diagram of the present application;

[0026] Figure 4 is the extraction mechanism schematic diagram of the present application;

[0027] Figure 5 is the crushing assembly schematic diagram of the present application;

[0028] Figure 6 is the installation schematic diagram of the sliding roller of the present application;

[0029] Figure 7The schematic diagram of the rotating disc structure of the present application;

[0030] Figure 8 The schematic diagram of the sliding roller structure of the present application;

[0031] Figure 9 The schematic diagram of the sliding roller and the limiting groove installation of the present application;

[0032] Figure 10 The schematic diagram of the limiting groove profile of the present application.

[0033] In the figure: 1, the shell; 11, the cylindrical block; 12, the electromagnetic valve; 2, the filler port; 3, the extraction zone; 4, the separation zone; 41, the flow guide table; 411, the connecting hole; 5, the material taking port; 6, the supporting leg; 7, the extraction mechanism; 71, the rotating motor; 72, the partition; 73, the transmission rod; 74, the cross ring; 741, the through hole; 75, the crushing assembly; 751, the stop block; 752, the rotating shaft; 753, the rotating disc; 7531, the hinged hole; 754, the sliding roller; 7541, the hinged shaft; 7542, the rolling groove; 76, the guide disc; 761, the limiting groove; 762, the annular groove; 763, the flow guide groove; 8, the separation mechanism; 81, the integrated ring; 82, the flow guide pipe; 83, the connecting pipe; 84, the collection bottle; 85, the elevated frame. DETAILED DESCRIPTION

[0034] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0035] As shown in Figures 1 to 10 , a supercritical carbon dioxide extraction equipment, comprising a shell 1, a filler port 2, an extraction zone 3, a separation zone 4, a material taking port 5, a supporting leg 6, an extraction mechanism 7 and a separation mechanism 8; the shell 1 is a cylindrical cylinder and is placed on the ground through the supporting leg 6, the filler port 2 is arranged on the side wall of the shell 1 and communicates with the extraction zone 3, the upper half of the shell 1 is the extraction zone 3, the lower half of the shell 1 is the separation zone 4 and the side wall is provided with the material taking port 5; the extraction mechanism 7 is installed in the extraction zone 3, the extraction mechanism 7 drives the rotating shaft 752 to rotate around the transmission rod 73 through the rotating force provided by the rotating motor 71, the sliding of the transmission rod 73 drives the rotating disc 753 to rotate and is limited by the limiting groove 761, the herbal essential oil flows out of the extraction zone 3 through the flow guide groove 763 under the gap cooperation of the sliding roller 754 rolling groove 7542 and the annular groove 762; the separation mechanism 8 is installed in the separation zone 4, the supercritical carbon dioxide enters the gas collection bottle under the flow guiding action of the flow guide table 41 and is cooled through the temperature control assembly.

[0036] As shown in Figure 1 , Figure 2 , and Figure 3As shown, the upper half of the shell 1 is divided into the extraction area 3, and the lower half constitutes the separation area 4, and the two are connected through the reasonably arranged material taking port 5. The design of this structure makes the whole extraction process efficient, and facilitates the smooth flow of the extracted material. In the extraction area 3, the installation of the extraction mechanism 7 enables it to rotate around the transmission rod 73 by the rotating force provided by the rotating motor 71. The transmission rod 73 drives the rotating disc 753 to rotate, and under the limiting of the limiting groove 761, the herbal essential oil can flow out of the extraction area 3 smoothly under the cooperation of the sliding roller 754 and the annular groove 762 gap.

[0037] As shown in the Figure 4 The extraction mechanism 7 includes a rotating motor 71, a partition plate 72, a transmission rod 73, a cross ring 74, a crushing assembly 75 and a guide disc 76; the inside of the shell 1 is provided with the partition plate 72, the upper end of the partition plate 72 is installed with the rotating motor 71, the center shaft of the partition plate 72 is connected with the transmission rod 73, and the transmission rod 73 is connected with the output shaft of the rotating motor 71; the other end of the transmission rod 73 is connected with the center shaft of the cross ring 74; the surface of the cross ring 74 is provided with a through hole 741, and the lower end of the cross ring 74 is connected with the crushing assembly 75 through the through hole 741; the inner diameter of the guide disc 76 is the same as that of the partition plate 72, and the guide disc 76 is connected at the lower end of the crushing assembly 75; the movement track of the center of the crushing assembly 75 is a circle with the outer diameter of the cross ring 74.

[0038] The inside of the shell 1 is provided with the partition plate 72, which divides the inside of the shell 1 into the extraction area 3 and the outside, and then combines the guide disc 76 to separately isolate the extraction area 3 inside the shell 1, thereby ensuring controllable air pressure to stabilize the supercritical state. The lower end of the guide disc 76 is provided as the separation area 4. The herbal essential oil is dissolved by supercritical carbon dioxide in the extraction area 3, and the supercritical carbon dioxide containing the herbal essential oil is guided to the integrated tank through the flow guide groove 763. Because the solubility of supercritical carbon dioxide is large and the viscosity is low, the supercritical carbon dioxide containing the herbal essential oil can flow to the separation area 4 through the flow guide pipe 82, and then enter the gas collection bottle under the action of the flow guide table 41. Subsequently, by adjusting the temperature, the carbon dioxide is converted into a gaseous state, and the herbal essential oil stays in the gas collection bottle.

[0039] The shell 1 is internally provided with a partition plate 72, and a rotating motor 71 is installed at the upper end of the partition plate 72, and the central shaft of the partition plate 72 is connected with the output shaft of the rotating motor 71 through a transmission rod 73. The other end of the transmission rod 73 is tightly connected with the central shaft of a cross ring 74, forming a tightly combined transmission system, which ensures smooth operation; the surface of the cross ring 74 is provided with a through hole 741, and the lower end is connected with a crushing assembly 75 through the through hole 741, and the inner diameter of a guide disc 76 is the same as the inner diameter of the partition plate 72, and the guide disc 76 is connected at the lower end of the crushing assembly 75. The structure design makes the movement track of the crushing assembly 75 consistent with the circle where the outer diameter of the cross ring 74 is located, and provides a stable movement track for the crushing assembly 75, so that the crushing operation is efficient. The crushing assembly 75 grinds and crushes herbal plants including rhizoma et radice seu rhizomae seu radix seu herba, honeysuckle, alocasia macrorrhiza, folium artemisiae argyi and radix seu herba, through the repeatedly moving sliding rollers 754, ensuring the comprehensiveness and efficiency of the extraction process.

[0040] The partition plate 72 arranged in the shell 1 not only helps to separate the shell 1 into the extraction area 3 and the outside, but also separates the extraction area 3 in the shell 1 by combining the guide disc 76, so that the gas pressure is controllably adjusted, thereby stabilizing the supercritical state. The lower end of the guide disc 76 is provided as a separation area 4, the herbal essential oil is dissolved in the supercritical carbon dioxide, and then the supercritical carbon dioxide containing the herbal essential oil is guided to the integrated groove through the flow guide groove 763. Since the solubility of supercritical carbon dioxide is large and the viscosity is low, the supercritical carbon dioxide containing the herbal essential oil can smoothly flow to the separation area 4, and then enter the gas collection bottle under the action of the flow guide table 41. Subsequently, by adjusting the temperature, the carbon dioxide is converted into a gaseous state, and the herbal essential oil stays in the gas collection bottle, realizing effective separation and extraction process.

[0041] As shown in Figure 5 The crushing assembly 75 includes a stopper 751, a rotating shaft 752, a rotating disc 753 and a sliding roller 754; the rotating shaft 752 is coaxially connected with the through hole 741, the stopper 751 is connected at the upper end of the through hole 741, the other end of the rotating shaft 752 is connected with the rotating disc 753, the rotating disc 753 is provided as a five-edged structure and each vertex of the five-edged structure is provided with a hinged hole 7531; the side wall of the sliding roller 754 is provided with a hinged shaft 7541, the hinged shaft 7541 is coaxially connected in the hinged hole 7531; the sliding roller 754 is provided as five, and the distance from the hinged shaft 7541 of the sliding roller 754 to the two ends is equal, and the rotating angle of the sliding roller 754 is 0°-360°.

[0042] As shown in Figure 6 and Figure 7As shown, the main purpose of the crushing assembly 75 is to crush the plants in combination with the guide disc 76. The limiting groove 761 on the surface of the guide disc 76 limits the movement of each sliding roller 754 in a fixed diameter direction. Since there are five sliding rollers 754, the center of the circle where the hinged shaft 7541 of the sliding roller 754 is located can move along a virtual circle path coaxial with the guide disc 76. Since the sliding rollers 754 slide at different paths, the hinged shaft 7541 of the sliding roller 754 is rotatably connected with the hinged hole 7531 with a rotation angle of 0°-360°, so that the rotating disc 753 can continuously rotate. The rotating shaft 752 is coaxially connected with the through hole 741, and the stop block 751 is connected to the upper end of the through hole 741. The other end of the rotating shaft 752 is connected with the rotating disc 753, and the rotating disc 753 is designed in a pentagonal structure, and each vertex is provided with a hinged hole 7531, which provides a position for the subsequent connection of the sliding roller 754.

[0043] As shown in Figure 8 The hinged shaft 7541 is coaxially connected in the hinged hole 7531, which ensures the stable movement of the sliding roller 754 and enables the sliding roller 754 to move in a fixed diameter direction under the action of the limiting groove 761. Since there are five sliding rollers 754, the distance from the hinged shaft 7541 to the two ends is equal, so that the rotation angle of the sliding roller 754 is 0°-360°. The hinged shaft 7541 of the sliding roller 754 can move along a virtual circle path coaxial with the guide disc 76. Therefore, during the sliding process of the sliding roller 754, due to the difference in the path of different sliding rollers 754, the hinged shaft 7541 of the sliding roller 754 is rotatably connected with the hinged hole 7531, and the rotation angle is within the range of 0°-360°, thereby ensuring the continuous rotation of the rotating disc 753. The main purpose of the crushing assembly 75 is to crush the plants in combination with the guide disc 76. The limiting groove 761 enables each sliding roller 754 to move in a fixed diameter direction, and the layout of the sliding roller 754 and the design of the hinged shaft 7541 enable them to work cooperatively during the crushing process, forming an efficient crushing system.

[0044] The side wall of the sliding roller 754 is provided with a rolling groove 7542, which is linearly arranged on the side wall of the sliding roller 754, and the two ends of the sliding roller 754 are designed to be tapered; the rolling groove 7542 is truncated near the hinge shaft 7541; the surface of the guide disc 76 is annularly arranged with 10 limiting grooves 761, which extend outward along the radius of the guide disc 76 to the side wall of the guide disc 76, and the inner wall of the limiting groove 761 is provided with an annular groove 762, which is linearly arranged along the radius of the guide disc 76, and the width of the recessed part of the annular groove 762 is twice the width of the recessed part of the rolling groove 7542; the bottom end inside the limiting groove 761 is provided with a flow guide groove 763, which connects the innermost annular groove 762 and the outermost annular groove 762.

[0045] The rolling groove 7542 is linearly arranged on the side wall of the sliding roller 754, and the two ends of the sliding roller 754 are designed to be tapered. These rolling grooves 7542 are truncated near the hinge shaft 7541, while the surface of the guide disc 76 is annularly arranged with 10 limiting grooves 761, which extend outward along the radius of the guide disc 76 to the side wall of the guide disc 76. The inner wall of the limiting groove 761 is provided with an annular groove 762, which is linearly arranged along the radius of the guide disc 76. The bottom end inside the limiting groove 761 is provided with a flow guide groove 763, which connects the innermost annular groove 762 and the outermost annular groove 762, forming a flow guide channel.

[0046] As shown in Figure 9 The surface rolling groove 7542 of the sliding roller 754 and the annular groove 762 in the limiting groove 761 are mutually fitted, forming a toothed structure, so that the sliding roller 754 can continuously fit with the annular groove 762 during repeated sliding, achieving continuous crushing of the herbal plants, facilitating the smooth flow of herbal essential oil, and entering the flow guide groove 763 under the action of gravity. The tapered end structure not only helps the smooth entry of the plants, but also effectively clamps the plants, reduces the interference between adjacent sliding rollers 754 during sliding, thereby improving the crushing efficiency and accuracy; the limiting groove 761 extends to the side wall of the guide disc 76, and the crushed material can flow into the flow guide pipe 82 through the flow guide groove 763, further ensuring the cooperative work of the crushing assembly 75 and the guide disc 76. Therefore, this design scheme not only optimizes the structure of the crushing assembly 75, making it more efficient and stable during crushing, but also improves the extraction efficiency.

[0047] The ratio of the maximum outer diameter of the arc-shaped recess structure formed at the center of the circular array of the limiting groove 761 to the length of the sliding roller 754 is 5:6. Since the trajectory of the center of the rotating disc 753 is a circle when the rotating disc 753 rotates, the sliding roller 754 will not be too short when it moves by setting the length ratio to 5:6. Due to the tapered structure of the two ends of the sliding roller 754, the sliding roller 754 can be stably embedded in the guide disc 76.

[0048] As shown in Figure 10 , the ratio of the maximum outer diameter of the arc-shaped recess structure to the length of the sliding roller 754 is designed to be 5:6; when the rotating disc 753 rotates, the trajectory of its center presents a circle. Through such design, the sliding roller 754 can maintain a moderate length during movement, avoiding being too short. The flexibility and rationality of this design enable the sliding roller 754 to fully exert its crushing effect during crushing, achieving uniform and comprehensive crushing of the plants; in addition, by designing the two ends of the sliding roller 754 as a tapered structure, this setting not only stably embeds the sliding roller 754 into the guide disc 76, but also helps to ensure proper clearance between adjacent sliding rollers 754 during sliding, thereby reducing unnecessary interference during sliding. The ingenious use of the tapered structure provides a more stable and reliable basis for the operation of the entire system, ensuring the effective work of the sliding roller 754 and facilitating the full crushing of the herbal plants.

[0049] As shown in Figure 2 , the separation mechanism 8 includes an integrated ring 81, a flow guide pipe 82, a connecting pipe 83, a collection bottle 84 and a lifting frame 85; the side wall of the shell 1 is provided with an integrated ring 81, which is hollow inside and communicates with the flow guide pipe 82 at the lower end, and the flow guide pipe 82 surrounds the shell 1 in a circular array of 10, the other end of the flow guide pipe 82 communicates with the separation zone 4, the collection bottle 84 is installed at the lower end of the separation zone 4, and the collection bottle 84 communicates with the inside of the separation zone 4 through the connecting pipe 83, and the lower end of the collection bottle 84 is provided with a lifting frame 85; the flow guide pipe 82 is provided as 10, which is the same as the number of limiting grooves 761, so that the herbal plant essential oil put into the shell 1 through the filler port 2 can be concentrated in the integrated ring 81 when the sliding roller 754 slides, and then enter the separation zone 4.

[0050] The side wall of the shell 1 extends out a cylindrical block 11, which communicates with the inner wall of the integrated ring 81, and the cylindrical block 11 is provided as a hollow structure and internally provided with an electromagnetic valve 12; the separation zone 4 is internally connected with a flow guide table 41, which is provided with a connecting hole 411 at the central axis, and the flow guide table 41 is a central concave structure, and the connecting hole 411 is internally connected with a connecting pipe 83; in order to prevent gas leakage or pressure change in the supercritical state, the electromagnetic valve 12 is provided, and the opening and closing of the electromagnetic valve 12 can be artificially controlled in the process of pressurization and temperature rise, thereby ensuring the stability of the gas pressure of the extraction zone 3 and the separation zone 4.

[0051] The side wall of the shell 1 is provided with an annular array of flow guide pipes 82, and the integrated ring 81 is internally provided as a hollow structure, and the lower end communicates with the flow guide pipe 82, and 10 flow guide pipes 82 are annularly arranged around the shell 1. The other end of the flow guide pipe 82 is connected with the separation zone 4, and the collection bottle 84 is installed at the lower end of the separation zone 4, and the connecting pipe 83 is connected with the inside of the separation zone 4, and the lower end of the collection bottle 84 is provided with a lifting frame 85. Such design makes that the herbal essential oil put in through the filler port 2 can be concentrated in the integrated ring 81, and then smoothly enter the separation zone 4.

[0052] The side wall of the shell 1 extends out a cylindrical block 11, which communicates with the inner wall of the integrated ring 81, and the cylindrical block 11 is provided as a hollow structure and internally provided with an electromagnetic valve 12; the separation zone 4 is internally connected with a flow guide table 41, which is provided with a connecting hole 411 at the central axis, and the flow guide table 41 is a central concave structure, and the connecting hole 411 is internally connected with a connecting pipe 83; in order to prevent gas leakage or pressure change in the supercritical state, the electromagnetic valve 12 is provided, and the opening and closing of the electromagnetic valve 12 can be artificially controlled in the process of pressurization and temperature rise, thereby ensuring the stability of the gas pressure of the extraction zone 3 and the separation zone 4.

[0053] The application in the working process, first put atractylodes, honeysuckle, acorus calamus, wormwood and one of the materials through the filler mouth 2 into the extraction area 3, then start rotating motor 71, the rotating motor 71 rotation drive transmission rod 73 rotation, the rotation of the transmission rod 73 drive cross ring 74 rotation, because the outer wall of the cross ring 74 is circular, so the rotating shaft 752 is driven by the circular track, in turn the rotating shaft 752 under the action of rotating connection due to the tangential force provided by the cross ring 74 moves, and the rotating shaft 752 in the self-rotation of the through hole 741, while driving the rotating disc 753 rotation, the rotation of the rotating disc 753 drive sliding roller 754 in the limiting groove 761 sliding, the sliding roller 754 is provided with 5, because of the setting of 10 limiting groove 761, the sliding roller 754 under the action of rotating disc 753 unidirectional repeatedly sliding, extruding the herbal essential oil, at this time through temperature control and air pressure control, according to the need of electromagnetic valve 12 open and close, at this time the extraction area 3 of carbon dioxide into supercritical state, supercritical carbon dioxide will dissolve the herbal essential oil, through the flow groove 763 to the cylindrical block 11, through the cylindrical block 11 into the integrated ring 81, then through the flow pipe 82 into the separation area 4, because of the center recessed flow guide table 41, supercritical carbon dioxide will flow to the connecting hole 411, then into the gas collection bottle, at this time the temperature is raised, supercritical carbon dioxide into gaseous state, plant essential oil remains in the gas collection bottle, so as to complete the extraction.

[0054] The description herein is provided to enable any person skilled in the art to practice or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the examples described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A supercritical carbon dioxide extraction device, comprising a shell (1), a filler port (2), an extraction zone (3), a separation zone (4), a material taking port (5) and a supporting leg (6); the shell (1) is a cylindrical barrel and is placed on the ground through the supporting leg (6), the upper half of the shell (1) is the extraction zone (3), and the lower half is the separation zone (4), the side wall of the extraction zone (3) is provided with the filler port (2), and the side wall of the separation zone (4) is provided with the material taking port (5); characterized in that: It also includes extraction mechanism (7) and separation mechanism (8); the extraction mechanism (7) is installed in the extraction area (3), the extraction mechanism (7) is rotated around the transmission rod (73) by the rotating force provided by the rotating motor (71) to drive the rotating shaft (752), the sliding of the transmission rod (73) drives the rotating disc (753) to rotate, and under the limitation of the guide groove (763), the herbal essential oil flows out of the extraction area (3) through the guide groove (763) under the gap cooperation of the sliding roller (754) and the annular groove (762); the separation mechanism (8) is installed in the separation area (4), and the supercritical carbon dioxide slides into the guide groove (763) from the inner wall of the annular groove (762) by gravity, and then the supercritical carbon dioxide is dispersed in the low temperature state and slides into the gas collection bottle; The extraction mechanism (7) includes rotating motor (71), partition (72), transmission rod (73), cross ring (74), crushing assembly (75) and guide disc (76); the inside of the shell (1) is provided with a partition (72), the upper end of the partition (72) is provided with a rotating motor (71), one end of the transmission rod (73) is connected with the output shaft of the rotating motor (71) and penetrates the center axis of the partition (72) and is connected with the center of the cross ring (74); the surface of the cross ring (74) is provided with a through hole (741), the lower end of the cross ring (74) is connected with the crushing assembly (75) through the through hole (741), and the guide disc (76) is connected at the lower end of the crushing assembly (75), and the inner diameter of the guide disc (76) is the same as the inner diameter of the partition (72); The crushing assembly (75) includes stop block (751), rotating shaft (752), rotating disc (753) and sliding roller (754); the rotating shaft (752) is coaxially connected with the through hole (741), the stop block (751) is connected at the upper end of the through hole (741), the other end of the rotating shaft (752) is connected with the rotating disc (753), and the rotating disc (753) is provided as a pentagonal structure and is provided with a hinged hole (7531) at each vertex of the pentagon; the side wall of the sliding roller (754) is provided with a hinged shaft (7541), and the hinged shaft (7541) is coaxially connected in the hinged hole (7531); The sliding roller (754) is provided as five, wherein the hinged shaft (7541) of the sliding roller (754) is equal in distance to the two ends, and the rotation angle of the sliding roller (754) is 0°-360°; The separation mechanism (8) comprises an integrated ring (81), a flow guide pipe (82), a connecting pipe (83), a collection bottle (84) and a lifting frame (85); the side wall of the shell (1) is provided with an integrated ring (81), the inside of the integrated ring (81) is a hollow structure, and the lower end is communicated with the flow guide pipe (82); the flow guide pipe (82) is arranged in an annular array of 10 around the shell (1), the other end of the flow guide pipe (82) is communicated with the separation zone (4), the collection bottle (84) is installed at the lower end of the separation zone (4), the collection bottle (84) is communicated with the inside of the separation zone (4) through the connecting pipe (83), and the lower end of the collection bottle (84) is provided with the lifting frame (85); In the process of sliding of the sliding roller (754), due to the path difference of different sliding rollers (754), the hinged shaft (7541) of the sliding roller (754) is rotatably connected with the hinged hole (7531), and the rotation angle is in the range of 0°-360°, thereby ensuring the continuous rotation of the rotating disc (753); the main purpose of the crushing assembly (75) is to crush plants by combining with the guide disc (76); the arrangement of the limiting groove (761) enables each sliding roller (754) to move in a fixed diameter direction, and the arrangement of the sliding roller (754) and the design of the hinged shaft (7541) enable them to work cooperatively in the crushing process, forming an efficient crushing system; The guide disc (76) is provided with 10 limiting grooves (761) in an annular array on the surface, the limiting grooves (761) extend outward along the radial direction of the guide disc (76) to the side wall of the guide disc (76), the inner wall of the limiting groove (761) is provided with an annular groove (762), the annular grooves (762) are arranged in a linear array along the radius of the guide disc (76), and the width of the recessed part of the annular groove (762) is twice the width of the recessed part of the rolling groove (7542). The bottom end in the limiting groove (761) is provided with a flow guide groove (763), and the flow guide groove (763) communicates the innermost annular groove (762) and the outermost annular groove (762).

2. A supercritical carbon dioxide extraction apparatus according to claim 1, wherein: The side wall of the sliding roller (754) is provided with a rolling groove (7542), the rolling grooves (7542) are arranged in a linear array on the side wall of the sliding roller (754), and the two ends of the sliding roller (754) are conical; the rolling groove (7542) is truncated near the hinged shaft (7541).

3. The supercritical carbon dioxide extraction apparatus of claim 1, wherein: The ratio of the maximum outer diameter value of the arc-shaped recess structure formed at the rear center of the annular array of the limiting groove (761) to the length value of the sliding roller (754) is 5:

6.

4. The supercritical carbon dioxide extraction apparatus of claim 1, wherein: The side wall of the shell (1) extends out of a cylindrical block (11), the cylindrical block (11) is communicated with the inner wall of the integrated ring (81), the cylindrical block (11) is arranged as a hollow structure and is internally provided with an electromagnetic valve (12); the inside of the separation zone (4) is connected with a flow guide table (41), the center axis of the flow guide table (41) is provided with a connecting hole (411), the flow guide table (41) is a center recess structure, and the connecting hole (411) is connected with the connecting pipe (83).

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