Traditional Chinese medicine supercritical fluid extraction device and extraction method

Abstract

The invention relates to the technical field of traditional Chinese medicine extraction, in particular to a traditional Chinese medicine supercritical fluid extraction device and method. The traditional Chinese medicine supercritical fluid extraction device comprises an extraction tank, a first heat exchanger, a separation tank, a collection box, a second heat exchanger, a gas booster pump, a carbon dioxide storage tank and a disassembly and assembly mechanism. The electromagnetic plate and the sealing plate are tightly connected only by placing the electromagnetic plate in the embedded groove, electrifying the electromagnetic plate to generate magnetism and magnetically attracting the electromagnetic plate, the sliding seat is driven by the driving assembly to slide on the mounting guide rail, the sealing plate is disassembled and assembled at the corresponding through groove, and the height of the connecting arm is adjusted through the lifting arm. By means of the structure, when the traditional Chinese medicinal materials on the partition plate located at the high position of the extraction tank need to be fed and discharged, operation is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of traditional Chinese medicine extraction, in particular to a traditional Chinese medicine supercritical fluid extraction device and an extraction method. Background Art

[0002] In the application and development of Traditional Chinese Medicine (TCM), how to effectively increase the extraction yield of its active ingredients is a core issue in enhancing its efficacy and promoting its modernization. Supercritical fluid extraction (SCFE), as an advanced extraction method, has emerged in the field of TCM extraction due to its unique advantages. This technology utilizes the special state of a supercritical fluid (typically carbon dioxide) above its critical temperature and pressure, combining the high diffusivity of a gas with the strong solubility of a liquid. It can efficiently and selectively extract active ingredients from TCM, playing an irreplaceable role in increasing the extraction yield of TCM active ingredients and ensuring their quality.

[0003] Patent document CN217854666U discloses a supercritical extraction device for traditional Chinese medicine, belonging to the technical field of extraction devices. The device comprises an extraction tank, wherein at least two partitions are provided in the extraction tank, the partitions being arranged in an S-shape, the space between the partitions forming an S-shaped channel, the air inlet of the extraction tank being connected to a first heat exchanger, and the air outlet of the extraction tank being connected to the air inlet of a separation tank via a pipe. This technical solution arranges the partitions in the extraction tank in an S-shape, allowing supercritical carbon dioxide to move in the S-shaped channel, so that the traditional Chinese medicine on each layer of the partitions can fully come into contact with the supercritical carbon dioxide, thereby improving the extraction efficiency.

[0004] However, in actual use, the existing supercritical extraction device for increasing the effective ingredients of traditional Chinese medicine has some partitions located in the upper half of the extraction tank. When it is necessary to load and unload the traditional Chinese medicine on the partition in the upper half, the operation is not convenient. Summary of the Invention

[0005] The purpose of the present invention is to provide a supercritical fluid extraction device and extraction method for traditional Chinese medicine, aiming to solve the technical problem that in the actual use of the existing supercritical extraction device for increasing the effective ingredients of traditional Chinese medicine, some partitions are located in the upper half of the extraction tank, and when the traditional Chinese medicine on the partition in the upper half needs to be loaded and unloaded, the operation is not convenient.

[0006] To achieve the above-mentioned object, the present invention provides a Chinese medicine supercritical fluid extraction device, comprising an extraction tank, a first heat exchanger, a separation tank, a collection box, a second heat exchanger, a gas booster pump, a carbon dioxide storage tank, and a disassembly and assembly mechanism, wherein the air inlet of the extraction tank is connected to the first heat exchanger, the air outlet of the extraction tank is connected to the air inlet of the separation tank via a pipeline, the liquid outlet of the separation tank is connected to the collection box, the air outlet of the separation tank is connected to the second heat exchanger, the air outlet of the second heat exchanger is connected to the gas booster pump via a pipeline, and the air outlet of the carbon dioxide storage tank is connected to the first heat exchanger via the gas booster pump. The extraction tank is provided with a plurality of partitions, and the spaces between the plurality of partitions form an S-shaped channel.

[0007] The disassembly and assembly mechanism includes a mounting guide rail, a drive assembly, a sliding seat, a lifting arm, a connecting arm and an electromagnetic plate, each of the partitions includes a placement frame and a sealing plate, a plurality of through slots are provided on the side of the extraction tank, each of the through slots is provided with the sealing plate, and each of the sealing plates on a side located inside the extraction tank is provided with the placement frame, the placement frame is used to place Chinese medicinal materials, and the space between the plurality of placement frames forms the S-shaped channel, and each of the sealing plates on a side located outside the extraction tank is provided with an embedding groove, and a magnetic plate is provided inside each of the embedding grooves, the mounting guide rail is provided on the outside of the extraction tank, the sliding seat is slidably provided on the mounting guide rail, the driving assembly is provided inside the mounting guide rail, the output end of the driving assembly is connected to the sliding seat, the upper surface of the sliding seat is provided with the lifting arm, the output end of the lifting arm is provided with the connecting arm, and the end of the connecting arm away from the lifting arm is provided with the electromagnetic plate, and the electromagnetic plate matches the magnetic plate.

[0008] Among them, the driving assembly includes a driving motor, a coupling, a threaded rod and a ball screw nut pair. A mounting plate is provided at the end of the mounting guide rail, the threaded rod is provided inside the mounting guide rail, the ball screw nut pair is provided on the threaded rod, the ball screw nut pair is connected to the sliding seat, the driving motor is installed on the mounting plate, and the output end of the driving motor is connected to the threaded rod through the coupling.

[0009] Among them, a rotating head and a connecting head are respectively provided at both ends of the threaded rod, and a rotating bearing is provided at both ends of the mounting guide rail. The rotating head and the connecting head are both embedded in the corresponding rotating bearing, and the coupling is connected to the connecting head.

[0010] Among them, the lifting arm includes a support arm, a servo motor, a screw and a sliding body, the sliding body is slidably arranged on the support arm, the connecting arm is arranged at one end of the sliding body facing the extraction tank, the servo motor is installed at the top of the support arm, the screw is arranged at the output end of the servo motor, a screw sleeve is arranged on the screw, and the screw sleeve is connected to the sliding body.

[0011] Among them, the traditional Chinese medicine supercritical fluid extraction device also includes a protective plate, the end face of the mounting guide rail is provided with the protective plate, the sliding seat is provided with a through groove, and the protective plate is located inside the through groove.

[0012] Wherein, fixed blocks are provided on the side surfaces of both ends of the protective plate, and the fixed blocks are connected to the side surfaces of the ends of the mounting guide rails.

[0013] The present invention also provides a method for extracting traditional Chinese medicine by adding supercritical fluid, which is applied to the traditional Chinese medicine extraction device by adding supercritical fluid as described above, and comprises the following steps:

[0014] After laying the Chinese medicinal materials on the placement frame, the plurality of partitions are installed inside the extraction tank using the disassembly and assembly mechanism;

[0015] Opening the carbon dioxide storage tank, and after being pressurized by the gas booster pump, transporting the carbon dioxide to the first heat exchanger for cooling, so that the carbon dioxide reaches a supercritical state at the first heat exchanger;

[0016] Opening the valve at the bottom of the extraction tank to allow supercritical carbon dioxide to enter the extraction tank and rise between the S-shaped channels, so that each Chinese medicinal material placed on the frame is fully in contact with the supercritical carbon dioxide;

[0017] Open the valve at the top of the extraction tank to allow the supercritical carbon dioxide that has completed the extraction to carry the effective ingredients in the Chinese medicinal materials into the separation tank, and reduce the pressure to allow the supercritical carbon dioxide to return to a gaseous state, and the extracted Chinese medicinal essence to settle to the bottom of the separation tank;

[0018] The valve at the bottom of the separation tank is opened to allow the essence of the Chinese medicinal materials at the bottom of the separation tank to flow into the collection box for collection, thereby completing the extraction of the Chinese medicinal materials.

[0019] The present invention provides a Chinese medicine supercritical fluid extraction device and extraction method, comprising an extraction tank, a first heat exchanger, a separation tank, a collection box, a second heat exchanger, a gas booster pump, a carbon dioxide storage tank and a disassembly and assembly mechanism, wherein the disassembly and assembly mechanism comprises a mounting guide rail, a drive assembly, a sliding seat, a lifting arm, a connecting arm and an electromagnetic plate. When it is necessary to complete loading and unloading of the partition at a high position, the electromagnetic plate only needs to be placed at the embedding groove. The electromagnetic plate is energized to generate magnetism, and after magnetic attraction with the magnetic plate, the electromagnetic plate and the sealing plate are tightly connected. The driving assembly drives the sliding seat to slide on the mounting guide rail to complete the disassembly and assembly of the sealing plate at the corresponding through groove. The lifting arm is used to adjust the height of the connecting arm, thereby completing the adjustment of the height of the partition, so as to facilitate the staff to pave or clean the Chinese medicinal materials on the placement frame. With the above structure, when it is necessary to load and unload the Chinese medicinal materials on the partition located at the high position of the extraction tank, the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a principle block diagram of a device for extracting traditional Chinese medicine with supercritical fluid according to a first embodiment of the present invention.

[0022] Figure 2 Schematic diagram of the external structure of the extraction tank in the first embodiment of the present invention.

[0023] Figure 3 The present invention provides Figure 2 A magnified view of the local structure at A.

[0024] Figure 4 The present invention provides Figure 2 A magnified view of the local structure at point B.

[0025] Figure 5 It is a structural diagram of the disassembly and assembly mechanism in the first embodiment of the present invention.

[0026] Figure 6 It is a structural diagram of the disassembly and assembly mechanism in the second embodiment of the present invention.

[0027] Figure 7 The present invention provides Figure 6 A magnified view of the local structure at point C.

[0028] Figure 8 The present invention provides a flowchart of the steps of the method for extracting traditional Chinese medicine with supercritical fluid.

[0029] 101-extraction tank, 102-first heat exchanger, 103-separation tank, 104-collection box, 105-second heat exchanger, 106-gas booster pump, 107-carbon dioxide storage tank, 108-mounting rail, 109-sliding seat, 110-connecting arm, 111-electromagnetic plate, 112-drive motor, 113-coupling, 114-threaded rod, 115-ball screw nut pair, 116-support arm, 117-servo motor, 118-screw, 119-sliding body, 120-S-shaped channel, 121-placing frame, 122-sealing plate, 123-through slot, 124-embedded slot, 125-magnetic plate, 126-mounting plate, 127-rotating head, 128-connecting head, 129-rotating bearing, 130-screw sleeve, 131-fixed wing plate, 201-protective plate, 202-through slot, 203-fixed block. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0031] First embodiment:

[0032] See also Figures 1 to 5 ,in Figure 1 This is a schematic diagram of the principle of the Chinese medicine supercritical fluid extraction device of the first embodiment. Figure 2 is a schematic diagram of the external structure of the extraction tank in the first embodiment, Figure 3 yes Figure 2 A magnified view of the local structure at A, Figure 4 yes Figure 2 A magnified view of the local structure at B. Figure 5 It is a structural diagram of the disassembly and assembly mechanism in the first embodiment.

[0033] The present invention provides a supercritical fluid extraction device for increasing the effective components of traditional Chinese medicine, comprising an extraction tank 101, a first heat exchanger 102, a separation tank 103, a collection box 104, a second heat exchanger 105, a gas booster pump 106, a carbon dioxide storage tank 107, and a disassembly and assembly mechanism. The disassembly and assembly mechanism comprises a mounting guide rail 108, a drive assembly, a sliding seat 109, a lifting arm, a connecting arm 110, and an electromagnetic plate 111. The drive assembly comprises a drive motor 112, a coupling 113, a threaded rod 114, and a ball screw nut pair 115. The lifting arm comprises a support arm 116, a servo motor 117, a screw rod 118, and a sliding body 119. The above-mentioned solution solves the problem that, during actual use, part of the partitions of the existing supercritical fluid extraction device for increasing the effective components of traditional Chinese medicine are located in the upper half of the extraction tank 101, and when it is necessary to load and unload the traditional Chinese medicine on the partitions in the upper half, the operation is not convenient. It can be understood that the above-mentioned solution can be used in a supercritical fluid extraction device and extraction method for increasing the effective components of traditional Chinese medicine.

[0034] According to this specific embodiment, the air inlet of the extraction tank 101 is connected to the first heat exchanger 102, the air outlet of the extraction tank 101 is connected to the air inlet of the separation tank 103 through a pipeline, the liquid outlet of the separation tank 103 is connected to the collection box 104, the air outlet of the separation tank 103 is connected to the second heat exchanger 105, the air outlet of the second heat exchanger 105 is connected to the gas booster pump 106 through a pipeline, and the air outlet of the carbon dioxide storage tank 107 is connected to the first heat exchanger 102 through the gas booster pump 106. A plurality of partitions are provided on the extraction tank 101, and the spaces between the plurality of partitions form an S-shaped channel 120. After Chinese medicinal materials are laid on the partitions, the plurality of partitions are installed inside the extraction tank 101, the carbon dioxide storage tank 107 is opened, and after being pressurized by the gas booster pump 106, the carbon dioxide is transported to the first heat exchanger 102 for cooling, so that the carbon dioxide is stored in the first heat exchanger 102. When the supercritical fluid state is reached, the valve at the bottom of the extraction tank 101 is opened to allow the carbon dioxide in the supercritical fluid state to enter the extraction tank 101 and rise between the S-shaped channels 120, so that the Chinese medicinal materials on each of the partitions are fully contacted with the carbon dioxide in the supercritical fluid state. The valve at the top of the extraction tank 101 is opened to allow the carbon dioxide in the supercritical fluid state that has completed the extraction to carry the effective ingredients in the Chinese medicinal materials to the separation tank 103, and the pressure is reduced to allow the carbon dioxide in the supercritical fluid state to return to the gaseous state. The extracted Chinese medicinal essence settles to the bottom of the separation tank 103. The valve at the bottom of the separation tank 103 is opened to allow the Chinese medicinal material essence at the bottom of the separation tank 103 to flow into the collection box 104 for collection, completing the extraction of the Chinese medicinal materials. The gaseous carbon dioxide is discharged from the gas outlet of the separation tank 103, cooled by the second heat exchanger 105, and then re-pressurized into the carbon dioxide storage tank 107 by the gas booster pump 106 for recycling.

[0035] Wherein, each of the partitions includes a placement frame 121 and a sealing plate 122, a plurality of through grooves 123 are provided on the side of the extraction tank 101, and a sealing plate 122 is provided at each of the through grooves 123, and each of the sealing plates 122 is provided with a placement frame 121 on one side inside the extraction tank 101, and the placement frame 121 is used to place Chinese medicinal materials, and the space between the plurality of placement frames 121 forms the S-shaped channel 120, and each of the sealing plates 122 is provided with an embedding groove 124 on one side outside the extraction tank 101, and a magnetic plate 125 is provided inside each embedding groove 124, and the mounting rail 108 is provided on the outside of the extraction tank 101, and the sliding seat 109 is slidably provided on the mounting rail 108, and the driving assembly is provided inside the mounting rail 108, and the output end of the driving assembly is connected to the sliding seat 109, and the upper surface of the sliding seat 109 is provided with the lifting arm, and the output of the lifting arm The end is provided with the connecting arm 110, and the end of the connecting arm 110 away from the lifting arm is provided with the electromagnetic plate 111, and the electromagnetic plate 111 is matched with the magnetic plate 125. When it is necessary to complete the loading and unloading of the partition at a high place, it is only necessary to place the electromagnetic plate 111 on the embedding groove 124. The electromagnetic plate 111 is energized to generate magnetism, and after magnetic attraction with the magnetic plate 125, the electromagnetic plate 111 is tightly connected with the sealing plate 122. The sliding seat 109 is driven by the driving assembly to slide on the mounting guide rail 108 to complete the disassembly and assembly of the sealing plate 122 at the corresponding through groove 123. The height of the connecting arm 110 is adjusted by the lifting arm, thereby completing the adjustment of the height of the partition, so as to facilitate the staff to pave or clean the Chinese medicinal materials on the placement frame 121. With the above structure, when it is necessary to load and unload the Chinese medicinal materials on the partition located at the high position of the extraction tank 101, the operation is more convenient.

[0036] Secondly, a mounting plate 126 is provided at the end of the mounting guide rail 108, and the threaded rod 114 is provided inside the mounting guide rail 108. The ball screw nut pair 115 is provided on the threaded rod 114, and the ball screw nut pair 115 is connected to the sliding seat 109. The drive motor 112 is installed on the mounting plate 126, and the output end of the drive motor 112 is connected to the threaded rod 114 through the coupling 113. When the drive motor 112 is started, the threaded rod 114 is driven to rotate through the coupling 113. Since the ball screw nut pair 115 is connected to the sliding seat 109, the sliding seat 109 is driven to slide on the mounting guide rail 108.

[0037] At the same time, a rotating head 127 and a connecting head 128 are respectively provided at both ends of the threaded rod 114, and a rotating bearing 129 is provided at both ends of the mounting guide rail 108. The rotating head 127 and the connecting head 128 are both embedded in the corresponding rotating bearing 129, and the coupling 113 is connected to the connecting head 128. Through the setting of the rotating bearing 129, the threaded rod 114 rotates more smoothly. Through the setting of the connecting head 128, the connection between the threaded rod 114 and the coupling 113 is facilitated.

[0038] In addition, the sliding body 119 is slidably provided on the support arm 116, and the connecting arm 110 is provided on the end of the sliding body 119 facing the extraction tank 101, and the servo motor 117 is installed at the top of the support arm 116, and the output end of the servo motor 117 is provided with the screw rod 118, and the screw rod 118 is provided with a screw rod sleeve 130, and the screw rod sleeve 130 is connected to the sliding body 119. When the servo motor 117 is started, the screw rod 118 is driven to rotate. Since the screw rod 118 is connected to the sliding body 119, the sliding body 119 is driven to slide on the support arm 116, and a fixed wing plate 131 is provided at the end of the support arm 116 close to the sliding seat 109, and the fixed wing plate 131 is connected to the upper surface of the sliding seat 109. The installation of the support arm 116 is completed by the setting of the fixed wing plate 131.

[0039] When using a Chinese medicine supercritical fluid extraction device according to the present embodiment, after laying Chinese medicinal materials on the partitions, multiple partitions are installed inside the extraction tank 101, the carbon dioxide storage tank 107 is opened, and after being pressurized by the gas booster pump 106, the carbon dioxide is transported to the first heat exchanger 102 for cooling, so that the carbon dioxide reaches a supercritical fluid state at the first heat exchanger 102, the valve at the bottom of the extraction tank 101 is opened, and the carbon dioxide that reaches the supercritical fluid state enters the extraction tank 101 and rises between the S-shaped channels 120, so that the Chinese medicinal materials on each partition are fully in contact with the carbon dioxide in the supercritical fluid state, the valve at the top of the extraction tank 101 is opened, and the carbon dioxide in the supercritical fluid state that has completed the extraction is transported to the separation tank 103 with the effective ingredients in the Chinese medicinal materials, and the pressure is reduced so that the carbon dioxide in the supercritical fluid state returns to a gaseous state, and the extracted Chinese medicinal essence settles in the separation tank 103. The bottom of the separation tank 103 is opened, and the valve at the bottom of the separation tank 103 is opened, and the essence of the Chinese medicinal materials at the bottom of the separation tank 103 flows into the collection box 104 for collection, completing the extraction of the Chinese medicinal materials. When it is necessary to complete the loading and unloading of the partition at a high position, it is only necessary to place the electromagnetic plate 111 on the embedding groove 124. The electromagnetic plate 111 is energized to generate magnetism, and after magnetic attraction with the magnetic plate 125, the electromagnetic plate 111 is tightly connected with the sealing plate 122. The driving assembly drives the sliding seat 109 to slide on the mounting guide rail 108 to complete the disassembly and assembly of the sealing plate 122 at the corresponding through groove 123. The height of the connecting arm 110 is adjusted by the lifting arm, thereby completing the adjustment of the height of the partition, so as to facilitate the staff to pave or clean the Chinese medicinal materials on the placement frame 121. With the above structure, when it is necessary to load and unload the Chinese medicinal materials on the partition located at the high position of the extraction tank 101, the operation is more convenient.

[0040] Second embodiment:

[0041] Based on the first embodiment, please refer to Figure 6 and Figure 7 , Figure 6 This is a structural diagram of the disassembly and assembly mechanism in the second embodiment. Figure 7 for Figure 6 A magnified view of the local structure at point C.

[0042] The present invention provides a Chinese medicine supercritical fluid extraction device further comprising a protective plate 201 .

[0043] According to this specific embodiment, the end face of the mounting guide rail 108 is provided with the protective plate 201, and the sliding seat 109 is provided with a through groove 202. The protective plate 201 is located inside the through groove 202. Through the setting of the protective plate 201, the end face of the mounting guide rail 108 is protected to prevent the external environment from affecting the operation of the drive component.

[0044] Among them, the side surfaces of both ends of the protective plate 201 are provided with fixing blocks 203, and the fixing blocks 203 are connected to the side surfaces of the ends of the mounting guide rails 108. The installation of the protective plate 201 is completed by the provision of the fixing blocks 203.

[0045] Secondly, the opening thickness of the through slot 202 is greater than the thickness of the protective plate 201 , so that the sliding seat 109 can slide more smoothly on the protective plate 201 .

[0046] When using a traditional Chinese medicine supercritical fluid extraction device according to this embodiment, the installation of the protective plate 201 is completed by setting the fixed block 203. The end face of the mounting guide rail 108 is protected by setting the protective plate 201 to prevent the external environment from affecting the operation of the driving assembly. In addition, since the opening thickness of the through groove 202 is greater than the thickness of the protective plate 201, the sliding seat 109 slides more smoothly on the protective plate 201.

[0047] See also Figure 8 The present invention also provides a method for extracting Chinese medicine by adding supercritical fluid, which is applied to the Chinese medicine extraction device by adding supercritical fluid as described above, comprising the following steps:

[0048] S1: After laying the Chinese medicinal materials on the placement frame 121, the plurality of partitions are installed inside the extraction tank 101 using the disassembly and assembly mechanism;

[0049] S2: Open the carbon dioxide storage tank 107, and after being pressurized by the gas booster pump 106, transport the carbon dioxide to the first heat exchanger 102 for cooling, so that the carbon dioxide reaches a supercritical state in the first heat exchanger 102;

[0050] S3: Open the valve at the bottom of the extraction tank 101 to allow supercritical carbon dioxide to enter the extraction tank 101 and rise between the S-shaped channels 120, so that each Chinese medicinal material placed on the frame 121 is fully in contact with the supercritical carbon dioxide;

[0051] S4: Open the valve at the top of the extraction tank 101 to allow the supercritical carbon dioxide that has completed the extraction to carry the effective ingredients in the Chinese medicinal materials into the separation tank 103, and reduce the pressure to allow the supercritical carbon dioxide to return to a gaseous state, and the extracted Chinese medicinal essence to settle to the bottom of the separation tank 103;

[0052] S5: Open the valve at the bottom of the separation tank 103 to allow the essence of the Chinese medicinal materials at the bottom of the separation tank 103 to flow into the collection box 104 for collection, thereby completing the extraction of the Chinese medicinal materials.

[0053] In this embodiment, after Chinese medicinal materials are laid on the partitions, multiple partitions are sequentially installed inside the extraction tank 101 through the setting of the disassembly and assembly mechanism, the carbon dioxide storage tank 107 is opened, and after being pressurized by the gas booster pump 106, the carbon dioxide is transported to the first heat exchanger 102 for cooling, so that the carbon dioxide reaches a supercritical fluid state at the first heat exchanger 102, and the valve at the bottom of the extraction tank 101 is opened to allow the carbon dioxide reaching a supercritical fluid state to enter the extraction tank 101 and rise between the S-shaped channels 120, so that the Chinese medicinal materials on each partition are fully in contact with the carbon dioxide in the supercritical fluid state, and the valve at the bottom of the extraction tank 101 is opened. The valve at the top of the extraction tank 101 allows the carbon dioxide in the supercritical fluid state that has completed the extraction to carry the effective ingredients in the Chinese medicinal materials to the separation tank 103, and reduces the pressure so that the carbon dioxide in the supercritical fluid state returns to a gaseous state, and the extracted Chinese medicinal essence settles to the bottom of the separation tank 103. The valve at the bottom of the separation tank 103 is opened, and the Chinese medicinal material essence at the bottom of the separation tank 103 flows into the collection box 104 for collection, completing the extraction of the Chinese medicinal materials, and the gaseous carbon dioxide is discharged from the air outlet of the separation tank 103. After cooling by the second heat exchanger 105, it is re-pressed into the carbon dioxide storage tank 107 through the gas booster pump 106 for recycling.

[0054] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A device for extracting traditional Chinese medicine with supercritical fluid, comprising an extraction tank, a first heat exchanger, a separation tank, a collection box, a second heat exchanger, a gas booster pump and a carbon dioxide storage tank, wherein the air inlet of the extraction tank is connected to the first heat exchanger, the air outlet of the extraction tank is connected to the air inlet of the separation tank through a pipeline, the liquid outlet of the separation tank is connected to the collection box, the air outlet of the separation tank is connected to the second heat exchanger, the air outlet of the second heat exchanger is connected to the gas booster pump through a pipeline, and the air outlet of the carbon dioxide storage tank is connected to the first heat exchanger through the gas booster pump, the extraction tank is provided with a plurality of partitions, and the space between the plurality of partitions forms an S-shaped channel, characterized in that Also includes a disassembly and assembly mechanism; The disassembly and assembly mechanism includes a mounting guide rail, a drive assembly, a sliding seat, a lifting arm, a connecting arm and an electromagnetic plate, each of the partitions includes a placement frame and a sealing plate, a plurality of through slots are provided on the side of the extraction tank, each of the through slots is provided with the sealing plate, and each of the sealing plates on a side located inside the extraction tank is provided with the placement frame, the placement frame is used to place Chinese medicinal materials, and the space between the plurality of placement frames forms the S-shaped channel, and each of the sealing plates on a side located outside the extraction tank is provided with an embedding groove, and a magnetic plate is provided inside each of the embedding grooves, the mounting guide rail is provided on the outside of the extraction tank, the sliding seat is slidably provided on the mounting guide rail, the driving assembly is provided inside the mounting guide rail, the output end of the driving assembly is connected to the sliding seat, the upper surface of the sliding seat is provided with the lifting arm, the output end of the lifting arm is provided with the connecting arm, and the end of the connecting arm away from the lifting arm is provided with the electromagnetic plate, and the electromagnetic plate matches the magnetic plate.

2. The Chinese medicine supercritical fluid extraction device according to claim 1, characterized in that: The drive assembly includes a drive motor, a coupling, a threaded rod and a ball screw nut pair. A mounting plate is provided at the end of the mounting guide rail, the threaded rod is provided inside the mounting guide rail, the ball screw nut pair is provided on the threaded rod, the ball screw nut pair is connected to the sliding seat, the drive motor is installed on the mounting plate, and the output end of the drive motor is connected to the threaded rod through the coupling.

3. The Chinese medicine supercritical fluid extraction device according to claim 2, characterized in that: A rotating head and a connecting head are respectively provided at both ends of the threaded rod, and a rotating bearing is provided at both ends of the mounting rail. The rotating head and the connecting head are both embedded in the corresponding rotating bearings, and the coupling is connected to the connecting head.

4. The Chinese medicine supercritical fluid extraction device according to claim 3, characterized in that: The lifting arm includes a support arm, a servo motor, a screw and a sliding body. The sliding body is slidably arranged on the support arm, and the connecting arm is provided at one end of the sliding body facing the extraction tank. The servo motor is installed at the top end of the support arm, and the output end of the servo motor is provided with the screw, and a screw sleeve is provided on the screw, and the screw sleeve is connected to the sliding body.

5. The Chinese medicine supercritical fluid extraction device according to claim 1, characterized in that: The Chinese medicine supercritical fluid extraction device also includes a protective plate, which is provided on the end surface of the mounting guide rail. A through groove is provided through the sliding seat, and the protective plate is located inside the through groove.

6. The Chinese medicine supercritical fluid extraction device according to claim 5, characterized in that: The side surfaces of both ends of the protective plate are provided with fixing blocks, and the fixing blocks are connected to the side surfaces of the ends of the mounting guide rails.

7. A method for extracting Chinese medicine by adding supercritical fluid, applied to the Chinese medicine extraction device by adding supercritical fluid as claimed in claim 1, characterized in that: The steps include: After laying the Chinese medicinal materials on the placement frame, the plurality of partitions are installed inside the extraction tank using the disassembly and assembly mechanism; Opening the carbon dioxide storage tank, and after being pressurized by the gas booster pump, transporting the carbon dioxide to the first heat exchanger for cooling, so that the carbon dioxide reaches a supercritical fluid state at the first heat exchanger; Opening the valve at the bottom of the extraction tank to allow the carbon dioxide in a supercritical fluid state to enter the extraction tank and rise between the S-shaped channels, so that each Chinese medicinal material placed on the frame is fully in contact with the carbon dioxide in a supercritical fluid state; Open the valve at the top of the extraction tank to allow the carbon dioxide in the supercritical fluid state that has completed the extraction to carry the effective ingredients in the Chinese medicinal materials to the separation tank, and reduce the pressure so that the carbon dioxide in the supercritical fluid state returns to a gaseous state, and the extracted Chinese medicinal essence settles to the bottom of the separation tank; The valve at the bottom of the separation tank is opened to allow the essence of the Chinese medicinal materials at the bottom of the separation tank to flow into the collection box for collection, thereby completing the extraction of the Chinese medicinal materials.

Images