Supercritical CO2 extractive distillation equipment

Abstract

The utility model discloses supercritical CO2 extractive distillation equipment, which relates to the technical field of extraction devices, and comprises a bottom cabinet, an adjusting cabinet arranged on the top surface of the bottom cabinet, a CO2 pressurizing component, a CO2 cooling component, a temperature adjusting component, an extraction component and a distillation component. According to the device, CO2 is pressurized by the high-pressure pump to enter a supercritical CO2 pressure state, the CO2 is stably kept at a preset temperature by utilizing a water bath effect, so that the CO2 enters a supercritical state, has gas diffusivity and liquid dissolving capacity, and enters the extraction container from the ventilation through holes of the extraction container to extract essential oil from seed powder; according to the device, after extraction, the separation tank is heated through the heat exchanger, supercritical CO2 in essential oil enters a gaseous state again so as to be separated from the essential oil, then residual CO2 is removed again through the heating distillation effect of the heating sleeve, CO2 and the essential oil are separated twice, the removal rate of CO2 is greatly increased, and the quality of the essential oil is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of extraction devices, specifically supercritical CO2 extraction and distillation equipment. Background Technology

[0002] The main methods of essential oil extraction include distillation, expression, enfleurage, solvent extraction, and supercritical CO2 extraction. Among them, supercritical CO2 extraction uses pressure and temperature to bring CO2 into a supercritical state to extract oil-containing plant materials, which is highly efficient and pure. However, existing supercritical CO2 extraction equipment may leave a small amount of CO2 in the essential oil after extraction and separation. As an acidic gas, CO2 will react with the essential oil if it remains in the essential oil for a long time, which will destroy the chemical structure of the essential oil and produce a small amount of acidic byproducts, resulting in a decline in the quality of the essential oil. Utility Model Content

[0003] This invention provides a supercritical CO2 extraction distillation device, which has the advantage of removing residual CO2 and improving the quality of essential oil extraction, thus solving the problem that essential oils produced by existing extraction equipment will have a small amount of residual CO2, which leads to a decline in the quality of the essential oils.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a supercritical CO2 extraction and distillation apparatus, comprising a base cabinet and a regulating cabinet disposed on the top surface of the base cabinet, characterized in that it further comprises a CO2 pressurization component, a CO2 cooling component, a temperature regulating component, an extraction component, and a distillation component, wherein:

[0005] The base cabinet is provided with a cabinet slot, the regulating cabinet is provided with a control panel, a number of regulating valves are installed on one side of the control panel, and a number of observation instruments are provided above the regulating valves and the control panel.

[0006] The CO2 pressurization assembly includes a CO2 tank, which is connected to a high-pressure pump via a gas guide pipe. The CO2 cooling assembly includes a cooling tank, in which a cooling tank is provided, and the cooling tank is connected to the high-pressure pump.

[0007] The extraction assembly includes a protective outer tank, the top of which has a mounting screw hole that penetrates the top surface of the cabinet. An extraction container is located inside the protective outer tank. One side of the protective outer tank is connected to a separation tank, and one side of the separation tank is connected to a distillation inner tank via a solenoid valve. The bottom of the distillation inner tank is fitted into a heating jacket.

[0008] As a preferred embodiment of this utility model, the temperature regulating component includes a water tank, a water pump is provided on the water tank, the water pump is connected to a heat exchanger, and the heat exchanger is connected to a protective outer tank.

[0009] As a preferred technical solution of this utility model, a cabinet door is installed on the side wall of the cabinet groove via a door hinge, a support frame is fixed on the bottom surface of the cabinet groove, the mounting screw is screwed into the sealing head, and the sealing head is provided with a rotating insertion hole.

[0010] As a preferred embodiment of this utility model, the cooling tank is provided with a spiral cooling pipe. One end of the cooling pipe is connected to one end of the through pipe through the cooling tank, and the other end is connected to an air compressor. The air compressor is connected to the storage tank through a conduit, and the storage tank stores coolant.

[0011] As a preferred embodiment of this utility model, the diameter of the cooling pipe is larger than that of the through pipe, the air compressor is connected to one end of the through pipe, and the through pipe passes through the exhaust fan.

[0012] As a preferred technical solution of this utility model, the top of the cooling tank is connected to the entrainer tank through a conduit. The entrainer tank is installed in the groove on the back of the regulating cabinet. The entrainer tank is connected to the purification tank. A CO2 flow meter is provided on one side of the purification tank. The bottom of the purification tank is connected to the heat exchanger through a conduit.

[0013] As a preferred embodiment of this utility model, the extraction container is provided with a perforated vent, the separation tank is connected to a heat exchanger, the upper end of the inner distillation tank is connected to the outer distillation tank, a discharge pipe is provided on one side of the inner distillation tank, and a CO2 reflux tank is connected on one side of the outer distillation tank. The CO2 reflux tank is connected to the CO2 tank body through a conduit.

[0014] Compared with the prior art, the present invention provides a supercritical CO2 extraction distillation device, which has the following beneficial effects:

[0015] This invention utilizes a high-pressure pump to pressurize CO2 into a supercritical CO2 state. A water bath effect is used to stabilize the CO2 at a preset temperature, thus achieving a supercritical state with gas diffusion and liquid solubility. The CO2 enters the extraction container through perforations to extract essential oils from seed powder. The device significantly increases the solubility of essential oils in CO2 during extraction by adding an entrainer, resulting in more efficient extraction. After extraction, a heat exchanger heats the separation tank, causing the supercritical CO2 in the essential oil to re-enter a gaseous state and separate from the oil. Residual CO2 is then removed again by heating and distillation under a heating mantle. This two-stage separation of CO2 and essential oil greatly improves the CO2 removal rate and enhances the quality of the essential oil. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

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

[0018] Figure 3 This is a schematic diagram of the pipe cabinet structure of this utility model;

[0019] Figure 4 This is a structural diagram of the CO2 cooling component of this utility model;

[0020] Figure 5 This is a schematic diagram of the extraction component structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the regulating cabinet structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the distillation assembly structure of this utility model.

[0023] In the diagram: 1. Base cabinet; 2. Regulating cabinet; 3. CO2 pressurization assembly; 4. CO2 cooling assembly; 5. Temperature control assembly; 6. Extraction assembly; 7. Distillation assembly; 11. Cabinet tank; 12. Cabinet door; 13. Support frame; 21. Control panel; 22. Regulating valve; 23. Observation instrument; 31. CO2 tank; 32. High-pressure pump; 33. Gas delivery pipe; 41. Cooling tank; 42. Cooling vessel; 43. Cooling pipe; 44. Connecting pipe; 45. Air compressor; 46. 47. Storage tank; 51. Exhaust fan; 52. Water tank; 53. Water pump; 54. Heat exchanger; 65. Protective outer tank; 66. Mounting screw; 67. Sealing head; 68. Rotary insertion hole; 69. Extraction container; 60. Vent perforation; 61. Separation tank; 62. Solenoid valve; 73. Distillation inner tank; 74. Heating jacket; 75. Distillation outer tank; 76. Discharge pipe; 77. CO2 reflux tank; 28. Entrainer tank; 29. ​​Purification tank; 20. CO2 flow meter. Detailed Implementation

[0024] 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. Example 1

[0025] Please see Figures 1-7 This utility model discloses a supercritical CO2 extraction and distillation apparatus, including a base cabinet 1 and a regulating cabinet 2 disposed on the top surface of the base cabinet 1. Its distinguishing feature is that it further includes a CO2 pressurization component 3, a CO2 cooling component 4, a temperature regulating component 5, an extraction component 6, and a distillation component 7, wherein:

[0026] The base cabinet 1 is provided with a cabinet slot 11, and the regulating cabinet 2 is provided with a control panel 21. Several regulating valves 22 are installed on one side of the control panel 21, and several observation instruments 23 are provided above the regulating valves 22 and the control panel 21.

[0027] Please refer to the appendix. Figure 4 The CO2 pressurization assembly 3 includes a CO2 tank 31, which is connected to the high-pressure pump 32 via a gas guide pipe 33. The CO2 cooling assembly 4 includes a cooling tank 41, which contains a cooling tank 42. The cooling tank 42 is connected to the high-pressure pump 32. Specifically, CO2 gas is released from the CO2 tank 31 and pressurized by the high-pressure pump 32 to the pressure state required to enter supercritical CO2. The high pressure causes the CO2 temperature to rise, so it needs to be introduced into the cooling tank 42 for cooling.

[0028] Please refer to the appendix. Figure 7 The extraction component 6 includes a protective outer tank 61. The top of the protective outer tank 61 is provided with an installation screw 62 that penetrates the top surface of the cabinet 1. An extraction container 64 is provided inside the protective outer tank 61. One side of the protective outer tank 61 is connected to a separation tank 65. One side of the separation tank 65 is connected to a distillation inner tank 71 through a solenoid valve 66. The bottom end of the distillation inner tank 71 is fitted into a heating jacket 72.

[0029] The temperature control component 5 includes a water tank 51, a water pump 52 is provided on the water tank 51, the water pump 52 is connected to a heat exchanger 53, and the heat exchanger 53 is connected to a protective outer tank 61.

[0030] In this embodiment, the water pump 52 draws constant-temperature water from the water tank 51 into the heat exchanger 53 to maintain the CO2 at the set temperature, thereby entering the supercritical state. Then, the supercritical CO2 enters the protective outer tank 61 and extracts the essential oil from the extraction container 64. The heating jacket 72 heats and distills the distillation inner tank 71, allowing the residual CO2 in the essential oil to fully evaporate, thus improving the quality of the essential oil. Example 2

[0031] Based on the above embodiment 1, please refer to the appendix. Figure 2 , Figure 3 , Figure 5 as well as Figure 6 The cabinet door 12 is installed on the side wall of the cabinet groove 11 via a door hinge. A support frame 13 is fixed on the bottom surface of the cabinet groove 11. The screw thread 62 is screwed into the sealing head 63. The sealing head 63 is provided with a rotating insertion hole 631.

[0032] The cooling tank 41 is equipped with a spiral cooling pipe 43. One end of the cooling pipe 43 is connected to one end of the through pipe 44 through the cooling tank 41, and the other end is connected to the air compressor 45. The air compressor 45 is connected to the storage tank 46 through a conduit. The storage tank 46 stores coolant.

[0033] The diameter of cooling pipe 43 is larger than that of through pipe 44. Air compressor 45 is connected to one end of through pipe 44. Through pipe 44 passes through exhaust fan 47. Specifically, because the diameter of cooling pipe 43 is larger than that of through pipe 44, the space becomes larger when the coolant enters cooling pipe 43. The expansion and decompression produce an endothermic effect, which cools the water in cooling tank 41. The propylene glycol added to the water can lower the freezing point of the water, resulting in a better cooling effect, thereby cooling the CO2 in cooling tank 42.

[0034] The top of the cooling tank 42 is connected to the entrainer tank 24 via a conduit. The entrainer tank 24 is installed in the groove on the back of the regulating cabinet 2. The entrainer tank 24 is connected to the purification tank 25. A CO2 flow meter 26 is provided on one side of the purification tank 25. The bottom of the purification tank 25 is connected to the heat exchanger 53 via a conduit. Specifically, the entrainer can significantly increase the solubility of essential oils in CO2 during extraction, which helps to extract essential oil components more efficiently.

[0035] The extraction container 64 is provided with a venting perforation 641, the separation tank 65 is connected to the heat exchanger 53, the upper end of the distillation inner tank 71 is connected to the distillation outer tank 73, the distillation inner tank 71 is provided with a discharge pipe 74 on one side, the distillation outer tank 73 is connected to the CO2 reflux tank 75 on one side, and the CO2 reflux tank 75 is connected to the CO2 tank body 31 through a conduit.

[0036] In this embodiment, the air compressor 45 pressurizes the coolant in the storage tank 46 into the through pipe 44, and uses the through pipe 44 to perform initial cooling through the exhaust fan 44. Then, it enters the cooling pipe 43 to cool the water in the cooling tank 41, thereby cooling the CO2 in the cooling tank 42.

[0037] The working principle and usage process of this utility model are as follows: First, the oil-containing seeds are crushed into powder and put into the extraction container 64. The extraction container 64 is placed into the protective outer tank 61, and the sealing head 63 is rotated to lock the installation screw 62. The equipment and related valves 22 are turned on through the control panel 21. CO2 gas is released from the CO2 tank 31 and pressurized by the high-pressure pump 32 to the pressure state of entering supercritical CO2. The high pressure causes the CO2 temperature to rise, and it needs to be introduced into the cooling tank 42 for cooling.

[0038] Water and propylene glycol are added to the cooling tank 41. The air compressor 45 is started to pressurize the coolant in the storage tank 46 into the through pipe 44. The coolant is initially cooled by the exhaust fan 44 through the through pipe 44 and then enters the cooling pipe 43 through the through pipe 44. Since the diameter of the cooling pipe 43 is larger than that of the through pipe 44, the space becomes larger when the coolant enters the cooling pipe 43. The expansion and decompression produce an endothermic effect, which cools the water in the cooling tank 41. The propylene glycol added to the water can lower the freezing point of the water, resulting in a better cooling effect, thereby cooling the CO2 in the cooling tank 42.

[0039] Cooled CO2 is introduced into entrainer tank 24 and mixed with entrainer. During extraction, the entrainer can significantly increase the solubility of essential oil in CO2, which helps to extract essential oil components more efficiently. After purification in purification tank 25, it enters heat exchanger 53 for temperature adjustment. During temperature adjustment, water pump 52 draws constant temperature water from water tank 51 into heat exchanger 53 to maintain the set temperature of CO2, thus entering the supercritical state, which has the diffusion capacity of gas and the dissolving capacity of liquid. Then, the supercritical CO2 enters the protective outer tank 61 and enters its interior through the vent 641 of extraction container 64 to extract essential oil from seed powder. The extracted essential oil and CO2 mixture enters the separation tank 65. Heat exchanger 53 is used to heat the separation tank 65, and the supercritical CO2 in the essential oil re-enters the gaseous state and is separated from the essential oil. The gaseous CO2 returns to the CO2 tank from CO2 return tank 75 for reuse.

[0040] Open the solenoid valve 66, and the separated essential oil flows from the separation tank 65 into the distillation tank 71. Start the heating jacket 72 to heat and distill the distillation tank 71, so that the residual CO2 in the essential oil can be fully volatilized and discharged into the CO2 reflux tank 75, which improves the quality of the essential oil. Open the discharge pipe 74 to complete the collection of essential oil.

Claims

1. Supercritical CO2 extraction distillation apparatus comprising a base cabinet (1) and an adjustment cabinet (2) provided on the top surface of the base cabinet (1), characterized in that, Also including CO2 pressurization assembly (3), CO2 cooling assembly (4), temperature regulating assembly (5), extraction assembly (6) and distillation assembly (7), wherein: The bottom cabinet (1) is provided with a cabinet groove (11), and the adjusting cabinet (2) is provided with a control panel (21), a plurality of adjusting valves (22) are installed on one side of the control panel (21), and a plurality of observation instruments (23) are arranged above the adjusting valves (22) and the control panel (21); The CO2 pressurization assembly (3) comprises a CO2 tank (31), the CO2 tank (31) is connected with a high-pressure pump (32) by a gas guide pipe (33), the CO2 cooling assembly (4) comprises a cooling tank (41), and the cooling tank (41) is provided with a cooling tank (42) therein, and the cooling tank (42) is communicated with the high-pressure pump (32); The extraction assembly (6) comprises a protective outer tank (61), the protective outer tank (61) is provided with a mounting screw port (62) at the top end and penetrates the top surface of the bottom cabinet (1), the protective outer tank (61) is provided with an extraction container (64) therein, one side of the protective outer tank (61) is communicated with a separation tank (65), one side of the separation tank (65) is communicated with a distillation inner tank (71) through an electromagnetic valve (66), and the distillation inner tank (71) is embedded in a heating sleeve (72) at the bottom end.

2. The supercritical CO2 extractive distillation apparatus according to claim 1, characterized by: The temperature regulating assembly (5) comprises a water tank (51), a water pump (52) is arranged on the water tank (51), the water pump (52) is connected with a heat exchanger (53), and the heat exchanger (53) is communicated with the protective outer tank (61).

3. The supercritical CO2 extractive distillation apparatus according to claim 2, characterized by: The side wall of the cabinet groove (11) is provided with a cabinet door (12) through a door hinge, the bottom surface of the cabinet groove (11) is fixedly provided with a support frame (13), the mounting screw port (62) is screw-connected with a sealing head (63), and the sealing head (63) is provided with a rotary insertion hole (631).

4. The supercritical CO2 extractive distillation apparatus according to claim 1, characterized by: The cooling tank (41) is provided with a spiral cooling pipe (43) therein, one end of the cooling pipe (43) is communicated with one end of a through pipe (44) through the cooling tank (41), and the other end of the cooling pipe (43) is connected with an air compressor (45), the air compressor (45) is connected with a storage tank (46) through a pipeline, and the storage tank (46) stores a coolant.

5. The supercritical CO2 extractive distillation apparatus according to claim 4, characterized by: The pipe diameter of the cooling pipe (43) is larger than that of the through pipe (44), one end of the through pipe (44) is connected with the air compressor (45), and the through pipe (44) penetrates the exhaust fan (47).

6. The supercritical CO2 extractive distillation apparatus according to claim 5, characterized by: The cooling tank (42) is communicated with a carrier agent tank body (24) through a pipeline at the top end, the carrier agent tank body (24) is installed in a recess on the back of the adjusting cabinet (2), the carrier agent tank body (24) is connected with a purification tank (25), one side of the purification tank (25) is provided with a CO2 flow meter (26), and the purification tank (25) is communicated with the heat exchanger (53) through a pipeline at the lower end.

7. The supercritical CO2 extractive distillation apparatus according to claim 6, characterized by: The extraction container (64) is provided with air-permeable perforations (641), the separation tank (65) is connected to the heat exchanger (53), the upper end of the distillation inner tank (71) is communicated with the distillation outer tank (73), one side of the distillation inner tank (71) is provided with a discharge pipe (74), one side of the distillation outer tank (73) is communicated with the CO2 reflux tank (75), and the CO2 reflux tank (75) is communicated with the CO2 tank body (31) through a conduit.

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