Astaxanthin supercritical extraction device

Abstract

The astaxanthin supercritical extraction device comprises an extraction barrel and a filter screen located in the extraction barrel and close to the bottom, a discharging pipe is arranged at the bottom of the extraction barrel, the top of the extraction barrel is fixedly connected with a feeding pipe, and a sealing ring is arranged at the position, close to the bottom, in the extraction barrel in an up-down sliding mode. The filtering net is conical, the small end of the filtering net faces upwards, the filtering net is arranged in the sealing ring in a sleeved mode, the filtering net and the sealing ring are in running fit, an annular pit close to the bottom is formed in the inner circumferential wall of the extraction barrel, and a turbulent flow impeller is arranged at the top of the sealing ring. According to the device disclosed by the utility model, the sealing ring and the annular recess are arranged, and the sealing ring is in up-down sliding fit relative to the extraction barrel and is in running fit with the filter screen, so that the device has the advantages that crushed shrimp shells completely participate in secondary extraction, and shrimp shell residues are more convenient to discharge; and meanwhile, the filter screen is more convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of astaxanthin extraction, in particular to a supercritical extraction device for astaxanthin. Background Technique

[0002] Astaxanthin is a chain-breaking antioxidant with extremely strong antioxidant capacity. It has various physiological functions such as inhibiting tumor occurrence, enhancing immunity, and scavenging free radicals in the body. It has broad application prospects in health products, medicine, cosmetics, food additives, and aquaculture. During the production process of astaxanthin, it is necessary to use a supercritical extraction device to extract and process astaxanthin from crushed shrimp shells.

[0003] The utility model with the publication number of CN211676399U proposes a supercritical extraction device for astaxanthin, including a device housing, a pressure roller and a small air pump. A feed pipe is bolted to the device housing, and a driving motor is welded to the device housing. A worm is shaft-connected to the driving motor, and a worm gear is fixed on the worm. A first transmission belt is meshed with the worm, and the first transmission belt is meshed with a screw rod. A second transmission belt is meshed with the screw rod, and the second transmission belt is meshed with the worm. The screw rod is shaft-connected to the device housing and installed in a feeding bin, and a connecting pipe is fixed on the screw rod. This supercritical extraction device for astaxanthin is provided with a screw rod. Under the action of the first transmission belt and the second transmission belt, the worm can drive the screw rods on both sides to rotate simultaneously. The screw rod can convey the crushed shrimp shells to the extraction pipe through the connecting pipe for secondary extraction, effectively improving the working efficiency of the device.

[0004] However, the above-mentioned prior art still has the following deficiencies when in use: 1. The filter plate arranged in the extraction barrel is a fixed structure, and the filter plate is inclined from the middle to both sides, and the bottom end surface of the extraction pipe is located at the center of the filter plate. This results in that only part of the crushed shrimp shell materials will be transported to the vicinity of the transmission bin, and other crushed shrimp shell materials cannot participate in the secondary extraction, having the defect of incomplete extraction; 2. After the crushed shrimp shell materials are extracted by supercritical carbon dioxide, residues will be formed. The residues are inconvenient to discharge when piled up on the filter plate, and it is also inconvenient to clean the filter plate, affecting the extraction effect.

[0005] Therefore, the utility model provides a supercritical extraction device for astaxanthin. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a supercritical extraction device for astaxanthin to solve the problems put forward in the above background technique. The utility model has the advantages of enabling the crushed shrimp shell materials to fully participate in the secondary extraction, being more convenient for discharging the shrimp shell residues, and being more convenient for cleaning the filter net at the same time.

[0007] To achieve the above object, the present utility model is realized by the following technical solutions: A supercritical extraction device for astaxanthin, comprising an extraction barrel and a filter screen near the bottom inside the extraction barrel. The bottom of the extraction barrel is provided with a discharge pipe and its top is fixedly connected with a feeding pipe. A sealing ring is slidably arranged up and down at a position near the bottom inside the extraction barrel. The filter screen is conical with the small end facing upward, and the filter screen is sleeved inside the sealing ring and the two are rotationally matched. An annular depression is provided on the inner peripheral wall of the extraction barrel near the bottom, and a flow disturbing impeller is arranged on the top of the sealing ring.

[0008] Further, an annular connecting disc is fixedly connected to the outer periphery of the filter screen. An annular groove is provided on the outer peripheral wall of the annular connecting disc, and a plurality of ball bearings that are circumferentially evenly distributed and rollingly matched with the inner peripheral wall of the sealing ring are embedded in the annular groove.

[0009] Further, an outer sealing rubber sleeve is fixedly sleeved on the outer peripheral wall of the sealing ring, and an inner sealing rubber sleeve is fixedly sleeved inside the sealing ring near the top.

[0010] Further, a trough-shaped plate penetrating the bottom of the extraction barrel is welded to the bottom of the sealing ring. A control motor is fixedly connected to the bottom inside the trough-shaped plate. A positioning beam is welded to the bottom of the annular connecting disc, and a transmission shaft penetrating the bottom of the extraction barrel and fixedly connected to the output shaft of the control motor is welded to the bottom of the positioning beam. The bottom of the extraction barrel is fixedly connected to the trough-shaped plate through a lifting rod.

[0011] Further, the bottom of the extraction barrel is a conical structure with the small end facing downward, and the discharge pipe is located at the small end of the bottom of the extraction barrel and is eccentrically distributed.

[0012] Further, a plurality of baffle plates that are circumferentially evenly distributed are welded on the outer conical wall of the filter screen, and the length direction of the baffle plates is distributed along the radial direction of the filter screen.

[0013] Further, a column is welded to the upper end surface of the sealing ring, and a cantilever located above the filter screen is welded to the top of the column. The free end of the cantilever is rotationally connected to the wheel shaft of the flow disturbing impeller.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. By setting the filter screen to a structure that can rotate relative to the extraction barrel, the present utility model is convenient for transmitting the shrimp shell pulverized matter thereon to the periphery by centrifugal force, so that all the shrimp shell pulverized materials on the filter screen can pass through the lifting bin arranged inside the extraction barrel, enabling the shrimp shell pulverized matter to be comprehensively subjected to secondary extraction treatment, thereby greatly improving the extraction efficiency of astaxanthin.

[0016] 2. The utility model is provided with an annular depression near the bottom on the inner peripheral wall of the extraction barrel. After the filter net enters the annular depression, the cavities above and below the filter net are in a communicating state. Thus, the rotating filter net can discharge the shrimp shell residues on it to the outside of the extraction barrel, which has the advantage of more convenient residue discharge. In addition, this kind of setting facilitates flushing the residues on the filter net and improves the purity of subsequent astaxanthin extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an astaxanthin supercritical extraction device of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram of the structure of the bottom;

[0019] Figure 3 is Figure 1 the front view of;

[0020] Figure 4 is a schematic diagram of the cooperation of the filter net, the sealing ring and the flow disturbing impeller of an astaxanthin supercritical extraction device of the present utility model;

[0021] Figure 5 is Figure 4 a schematic diagram of the structure of the bottom;

[0022] Figure 6 is a sectional view of the cooperation of the filter net and the sealing ring of an astaxanthin supercritical extraction device of the present utility model.

[0023] In the figure: 1. Extraction barrel; 11. Annular depression; 2. Filter net; 21. Annular connection plate; 211. Annular groove; 2111. Ball; 212. Positioning beam; 22. Paddle; 3. Sealing ring; 31. Column; 311. Cantilever; 32. Outer sealing rubber sleeve; 33. Inner sealing rubber sleeve; 34. Grooved plate; 4. Discharge pipe; 5. Flow disturbing impeller; 51. Shaft; 6. Control motor; 7. Transmission shaft; 8. Feeding pipe; 9. Lifting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] Please refer to Figures 1 to 6, the present utility model provides a technical solution: an astaxanthin supercritical extraction device, including an extraction barrel 1 and a filter screen 2 near the bottom inside the extraction barrel 1. The extraction barrel 1 and other structures therein (such as: shrimp shell crushing rod group, spiral transmission structure, extraction pipe and other structures, critical carbon dioxide inlet pipe and carbon dioxide recovery pipe) can adopt the existing structures in the patent documents mentioned in the background technology. The bottom of the extraction barrel 1 is provided with a discharge pipe 4 and its top is fixedly connected with a feeding pipe 8. The function of the discharge pipe 4 is to discharge the extracted astaxanthin, and the feeding pipe 8 is the channel for feeding raw materials (extraction liquid, shrimp shells, etc.) into the extraction barrel 1.

[0026] In this technical solution, a sealing ring 3 is slidably arranged up and down at a position near the bottom inside the extraction barrel 1. The sealing ring 3 is in sealing cooperation with the inner peripheral wall of the extraction barrel 1. The filter screen 2 is conical with the small end facing upward. After astaxanthin passes through the filter screen 2, it will be discharged through the discharge pipe 4 at the bottom. The function of the filter screen 2 is to use its conical surface to guide the crushed shrimp shells in all directions around it, so that the crushed shrimp shells are close to the feeding bin inside the extraction barrel 1. When the sealing ring 3 moves up and down, it can drive the filter screen 2 to move up and down. Among them, the filter screen 2 is sleeved inside the sealing ring 3 and the two are rotationally matched. When the filter screen 2 rotates, it can use centrifugal force to transmit the crushed shrimp shells on it in all directions, and at the same time make the crushed shrimp shells fully transmit towards the feeding bin. Compared with the prior art, this setting greatly improves the comprehensiveness and efficiency of the multiple crushing treatment of shrimp shells, and improves the utilization rate of shrimp shells during astaxanthin extraction.

[0027] Furthermore, an annular depression 11 is provided on the inner peripheral wall of the extraction barrel 1 near the bottom. The height of the annular depression 11 groove is greater than the height of the sealing ring 3. After the sealing ring 3 moves downward into the annular depression 11, the shrimp shell residues on the filter screen 2 will pass through the annular depression 11 and be transmitted downward, and finally be discharged through the discharge pipe 4, which has the function of discharging the filter. It should be noted that this setting also has the function of facilitating the flushing of the filter screen 2. After the shrimp shell residues are cleaned up, when the sealing ring 3 is controlled to move above the annular depression 11, the filter screen 2 can continue to filter.

[0028] In this technical solution, a flow disturbing impeller 5 is provided on the top of the sealing ring 3. Specifically, a column 31 is welded to the upper end surface of the sealing ring 3. The top of the column 31 is welded with a cantilever 311 located above the filter screen 2. The free end of the cantilever 311 is rotationally connected with the wheel shaft 51 of the flow disturbing impeller 5. When the filter screen 2 rotates, it can drive the materials on it to rotate. The materials impact the flow disturbing impeller 5, and the flow disturbing impeller 5 rotates passively to stir the materials, improving the fluidity of the materials above the filter screen 2, and at the same time accelerating the full mixing of the materials and critical carbon dioxide.

[0029] In this embodiment, an annular connecting disk 21 is fixedly connected to the outer periphery of the filter net 2. An annular groove 211 is formed in the outer peripheral wall of the annular connecting disk 21. A number of balls 2111 that are circumferentially and evenly distributed and are in rolling fit with the inner peripheral wall of the sealing ring 3 are embedded in the annular groove 211. The balls 2111 can improve the smoothness of the rotational fit between the annular connecting disk 21 and the sealing ring 3. Among them, an outer sealing rubber sleeve 32 is fixedly sleeved on the outer peripheral wall of the sealing ring 3, and the outer sealing rubber sleeve 32 improves the sealing degree of the contact between the sealing ring 3 and the extraction barrel 1. An inner sealing rubber sleeve 33 is fixedly sleeved inside the sealing ring 3 near the top, and the inner sealing rubber sleeve 33 improves the sealing degree of the contact between the annular connecting disk 21 and the sealing ring 3.

[0030] Furthermore, a channel-shaped plate 34 that penetrates the bottom of the extraction barrel 1 is welded to the bottom of the sealing ring 3. During specific implementation, positioning sleeves can be welded to the bottom of the extraction barrel 1 and sleeved on the outside of two vertical rods on the channel-shaped plate 34. The positioning sleeves are slidably connected to the vertical rods. Among them, a connecting beam that is fixedly connected to the top of the channel-shaped plate 34 is welded to the bottom of the sealing ring 3. A control motor 6 is fixedly connected to the bottom inside the channel-shaped plate 34. A positioning beam 212 is welded to the bottom of the annular connecting disk 21. A transmission shaft 7 that penetrates the bottom of the extraction barrel 1 and is fixedly connected to the output shaft of the control motor 6 is welded to the bottom of the positioning beam 212. The control motor 6 drives the filter net 2 to rotate through the transmission shaft 7. The bottom of the extraction barrel 1 is fixedly connected to the channel-shaped plate 34 through a lifting rod 9. The lifting rod 9 can be a cylinder or an oil cylinder, and it controls the up and down movement of the channel-shaped plate 34. Among them, a rotating sleeve and a guiding sleeve sleeved inside the rotating sleeve are provided at the bottom of the extraction barrel 1, and the guiding sleeve is sleeved on the outside of the transmission shaft 7.

[0031] The bottom of the extraction barrel 1 is a conical structure with the small end facing downwards. The discharge pipe 4 is located at the small end of the bottom of the extraction barrel 1 and is eccentrically distributed. This setting facilitates the docking of the discharge pipe 4 with an external transfer barrel.

[0032] In this embodiment, a number of evenly distributed baffles 22 are welded to the outer conical wall of the filter net 2. The length direction of the baffles 22 is distributed along the radial direction of the filter net 2. When the filter net 2 rotates, the baffles 22 can be used to agitate the materials thereon, accelerating the rotation of the materials.

[0033] Working principle: During use, the materials are put in through the feeding pipe 8, and then critical carbon dioxide is injected into the extraction barrel 1. The driving control motor 6 is started, and the transmission shaft 7 drives the filter net 2 to rotate. The crushed shrimp shells fall onto the filter net 2 and then are transported back to the outer periphery. The extracted astaxanthin passes through the filter net 2 and then falls downward. The shrimp shells on the filter net 2 are transported upward through the transfer bin, realizing cyclic extraction. When it is necessary to discharge the shrimp shell residues after the extraction is completed, the lifting rod 9 is started, and the channel-shaped plate 34 moves downward. When the sealing ring 3 enters the annular depression 11, at this time, the shrimp shell residues on the rotating filter net 2 will pass through the annular depression 11 and then fall downward, and finally are discharged through the discharge pipe 4.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An astaxanthin supercritical extraction device, comprising an extraction barrel (1) and a filter screen (2) located near the bottom of the extraction barrel (1), wherein a discharge pipe (4) is provided at the bottom of the extraction barrel (1) and a feeding pipe (8) is fixedly connected to the top thereof, characterized in that: A sealing ring (3) is provided in a position near the bottom of the extraction barrel (1) so as to slide up and down. The filter screen (2) is conical in shape with the small end facing upward. The filter screen (2) is sleeved in the sealing ring (3) and the two are rotatably matched. The inner peripheral wall of the extraction barrel (1) is provided with an annular recess (11) near the bottom. A turbulent impeller (5) is provided on the top of the sealing ring (3).

2. The astaxanthin supercritical extraction device according to claim 1, characterized in that: The outer periphery of the filter screen (2) is fixedly connected to an annular connecting plate (21), the outer peripheral wall of the annular connecting plate (21) is provided with an annular groove (211), and the annular groove (211) is embedded with a plurality of balls (2111) which are evenly distributed in the circumference and rollably matched with the inner peripheral wall of the sealing ring (3).

3. The astaxanthin supercritical extraction device according to claim 2, characterized in that: The outer peripheral wall fixing sleeve of the sealing ring (3) is provided with an outer sealing rubber sleeve (32), and the inner fixing sleeve of the sealing ring (3) is provided with an inner sealing rubber sleeve (33) close to the top.

4. The astaxanthin supercritical extraction device according to claim 2, characterized in that: A grooved plate (34) penetrating the bottom of the extraction barrel (1) is welded to the bottom of the sealing ring (3), and a control motor (6) is fixedly connected to the bottom of the grooved plate (34). A positioning beam (212) is welded to the bottom of the annular connecting plate (21), and a transmission shaft (7) penetrating the bottom of the extraction barrel (1) and fixedly connected to the output shaft of the control motor (6) is welded to the bottom of the positioning beam (212). The bottom of the extraction barrel (1) is fixedly connected to the grooved plate (34) via a lifting rod (9).

5. The astaxanthin supercritical extraction device according to claim 4, characterized in that: The bottom of the extraction barrel (1) is a conical structure with the small end facing downwards, and the discharge pipe (4) is located at the small end of the bottom of the extraction barrel (1) and is eccentrically distributed.

6. The astaxanthin supercritical extraction device according to claim 1, characterized in that: A plurality of circumferentially evenly distributed shifting plates (22) are welded on the outer conical wall of the filter screen (2), and the length direction of the shifting plates (22) is distributed along the radial direction of the filter screen (2).

7. The astaxanthin supercritical extraction device according to claim 1, characterized in that: A column (31) is welded to the upper end surface of the sealing ring (3), a cantilever (311) located above the filter screen (2) is welded to the top of the column (31), and the free end of the cantilever (311) is rotatably connected to the axle (51) of the turbulent impeller (5).

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