Spirulina polysaccharide extraction device

Abstract

The present application relates to the technical field of biomass polysaccharide extraction, in particular to a spirulina polysaccharide extraction device, which comprises a first support frame, a temperature control structure, an extraction tank, a stirring structure, an opening and closing structure, a separation structure, a separation box, a filtering structure, a first connecting pipe, a cyclone, a second connecting pipe and a butt flange. The opening and closing structure is arranged at the bottom of the extraction tank, the algal sludge mixture in the extraction tank is directly sent into the cyclone through the booster pump, the centrifugal field generated by the cyclone is used to realize the rapid and continuous separation of the algal sludge residue and the sugar-containing liquid, the algal residue is discharged from the butt flange at the bottom into the residue storage groove of the separation box, and the sugar-containing clear liquid enters the liquid storage groove from the second connecting pipe at the top. Compared with the traditional static precipitation method, the separation efficiency is greatly improved, there is no need to wait for the precipitation time, the continuous operation of solid-liquid separation is realized, and the stirring structure is arranged to promote the up-down circulation of the algal sludge mixture during stirring, thereby enhancing the dissolution effect of polysaccharide.

Description

Technical Field

[0001] This invention relates to the field of biomass polysaccharide extraction technology, specifically a spirulina polysaccharide extraction device. Background Technology

[0002] After phycocyanin is extracted from spirulina, the remaining liquid and algal sludge still contain abundant polysaccharides. Currently, the mainstream method for extracting polysaccharides from this residue is hot water extraction: the remaining algal residue after phycocyanin extraction is fed into an extraction tank along with the liquid. Heating and stirring are used to fully dissolve the polysaccharides in the water. The supernatant is then collected by allowing it to settle, or by using a filtration membrane for solid-liquid separation to obtain an extract containing polysaccharides.

[0003] However, in existing hot water extraction devices, after extraction, the algae-sludge mixture is mostly separated into solid and liquid by natural settling. This method is time-consuming and difficult to achieve continuous production. Furthermore, the extraction of the supernatant after settling easily disturbs the bottom sediment layer, resulting in insufficient clarity of the extract. Some devices use filter membranes for separation, but algae particles easily clog the membrane pores, requiring frequent cleaning or replacement of the filter membrane, which is cumbersome and costly to maintain. At the same time, there is a dead flow area at the drain valve at the bottom of the extraction tank, where algae residue easily accumulates and hardens around the valve, causing not only poor drainage but also difficulty in cleaning, affecting production hygiene and extraction efficiency between batches. During the extraction process, algae tends to adhere to the inner wall of the tank, and traditional single-layer agitators are unable to effectively scrape off the wall deposits, resulting in reduced heat transfer efficiency and some polysaccharides not being fully dissolved, thus reducing polysaccharide yield and equipment utilization. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a spirulina polysaccharide extraction device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a spirulina polysaccharide extraction device, including a first support frame and a separation structure disposed on the first support frame. The separation structure is provided with a filtration structure. The filtration structure includes a first connecting pipe, a hydrocyclone, a second connecting pipe and a docking flange. A hydrocyclone is installed on the separation box of the separation structure. A first connecting pipe is installed at the liquid inlet of the hydrocyclone. A second connecting pipe is installed at the top of the hydrocyclone. A docking flange is fixed at the bottom of the hydrocyclone. The bottom ends of the docking flange and the second connecting pipe are both connected to the separation box. A booster pump is installed inside the first support frame. The liquid outlet of the booster pump is fixedly connected to the bottom end of the first connecting pipe. The liquid inlet of the booster pump is connected to an opening and closing structure. The opening and closing structure is located at the bottom of the extraction tank. The exterior of the extraction tank is equipped with a temperature control structure, which is fixed to the second support frame. The interior of the extraction tank is equipped with a stirring structure.

[0006] Specifically, the temperature control structure includes an insulated outer barrel, which is installed on the outside of the extraction tank. A spiral heat exchange tube is provided in the interlayer between the insulated outer barrel and the extraction tank. A first connector and a second connector are fixed on the insulated outer barrel, and the first connector and the second connector are respectively fixed to the two ends of the heat exchange tube.

[0007] Specifically, the stirring structure includes a stirring rod, an end cap is installed at the top of the extraction tank, the stirring rod is rotatably mounted on the end cap, a driving component is fixed on the end cap, the driving component is fixedly connected to the stirring rod, two mounting sleeves are mounted on the stirring rod, the mounting sleeves are provided with spiral stirring paddles, the stirring paddles are provided with multiple through holes, and the two stirring paddles are symmetrically arranged. When the stirring rod drives the two stirring paddles with opposite spiral directions to rotate through the mounting sleeves, the stirring paddles promote the vertical disturbance of the algae mud mixture, and the through holes ensure the strength of the disturbance, so that the stirring structure has a better stirring effect on the algae mud mixture.

[0008] Specifically, multiple scrapers are fixed to the outer sides of both stirring paddles. The lengths of the multiple scrapers are different, and the lengths of the two scrapers set in each group are equal.

[0009] Specifically, the opening and closing structure includes a vertical pipe and a guide pipe provided on the side wall of the vertical pipe. The vertical pipe is fixed to the bottom end of the extraction tank. A sealing ring is installed between the vertical pipe and the extraction tank. The guide pipe is connected to the inlet of the booster pump.

[0010] Specifically, a sliding sleeve is slidably provided inside the vertical tube, and a sealing plug with a triangular cross-section is fitted onto the sliding sleeve. A fixing sleeve is installed at the top of the sealing plug, and the fixing sleeve and the sliding sleeve are connected by bolts.

[0011] Specifically, a telescopic component is installed at the bottom end of the vertical pipe, and the top end of the piston rod of the telescopic component is fixed to the sliding sleeve.

[0012] Specifically, a scraper sleeve is slidably mounted on the vertical pipe, and the piston rod is slidably connected to the scraper sleeve. The scraper sleeve is located between the sliding sleeve and the telescopic component, and a spring is installed between the scraper sleeve and the telescopic component. The piston rod passes through the spring. When the piston rod slides downward, it drives the sliding sleeve to slide downward in the vertical pipe against the scraper sleeve, causing the sliding sleeve to slide to the bottom end of the vertical pipe. When the piston rod slides upward, the spring contacts the scraper sleeve to reset, and the scraper sleeve slides upward in the vertical pipe, allowing the algae-mud mixture at the bottom end of the vertical pipe to be discharged from the vertical pipe into the guide pipe, effectively preventing liquid accumulation at the bottom end of the vertical pipe.

[0013] Specifically, the vertical tube has an annular guide groove inside, and the vertical tube has multiple spray holes arranged in a circular array inside, facing the sealing plug and the bottom drain port of the extraction tank. The vertical tube has an inlet head installed on its side wall, and the inlet head is connected to the guide groove.

[0014] Specifically, the separation structure includes a separation box, which is fixed on the first support frame. The separation box is equipped with a chip storage tank and a liquid storage tank inside. The docking flange is correspondingly arranged with the chip storage tank, and the second connecting pipe is correspondingly arranged with the liquid storage tank. The bottom of the separation box is provided with an inclined guide trough and a drain trough. The guide trough is located at the bottom of the chip storage tank, and the drain trough is located at the bottom of the liquid storage tank. A chip discharge pipe communicating with the guide trough is fixed on the separation box, and a drain pipe communicating with the drain trough is installed on the separation box.

[0015] The beneficial effects of this invention are: (1) The spirulina polysaccharide extraction device of the present invention automatically opens and closes the drain port by setting an opening and closing structure at the bottom of the extraction tank and using a telescopic component to drive the sealing plug. No manual operation of the valve is required. When the piston rod slides down, the piston rod drives the sliding sleeve to slide down in the vertical tube against the scraper sleeve, so that the sliding sleeve slides to the bottom end of the vertical tube. When the piston rod slides up, the spring contacts the scraper sleeve to reset, and the scraper sleeve slides up in the vertical tube, so that the algae mud mixture at the bottom end of the vertical tube is discharged from the vertical tube to the guide pipe, effectively preventing the accumulation of liquid at the bottom end of the vertical tube. By setting an annular guide groove and a spray hole inside the vertical tube, after the external cleaning liquid is connected, the cleaning liquid is sprayed out at high speed through the spray hole, which can flush and clean the sealing plug and the drain port at the bottom end of the extraction tank, avoiding the algae mud from sticking on the sealing plug and affecting the sealing performance.

[0016] (2) The spirulina polysaccharide extraction device of the present invention directly sends the algae mud mixture in the extraction tank into the hydrocyclone through a booster pump. The centrifugal force field generated by the hydrocyclone is used to realize the rapid and continuous separation of algae mud residue and sugar-containing liquid. The algae residue is discharged into the storage tank of the separation box from the bottom connecting flange, and the sugar-containing clear liquid enters the storage tank from the top second connecting pipe. Compared with the traditional static sedimentation method, the separation efficiency is greatly improved, and there is no need to wait for sedimentation time, realizing the continuous operation of solid-liquid separation.

[0017] (3) The spirulina polysaccharide extraction device of the present invention has two stirring paddles with opposite spiral directions on the stirring rod and through holes on the stirring paddles. During the stirring process, the algae mud mixture is circulated up and down. The through holes can generate turbulent disturbance, which enhances the dissolution effect of polysaccharides. The outer side of the stirring paddle is fixed with scrapers of different lengths. The upper and lower scrapers are complementary in length and can cover different height areas of the inner wall of the extraction tank, effectively scraping off the algae mud attached to the tank wall, improving the heat transfer efficiency and tank cleanliness. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of a spirulina polysaccharide extraction device provided by the present invention; Figure 2 This is a schematic diagram of the connection structure between the guide pipe and the booster pump of the present invention; Figure 3 for Figure 2 Cross-sectional view; Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of part A. Figure 5 This is a schematic diagram of the temperature control structure and the mixing tank of the present invention; Figure 6 This is a schematic diagram of the stirring structure of the present invention; Figure 7 This is a schematic diagram of the separation structure and the filtration structure of the present invention; Figure 8 for Figure 7 Top view; Figure 9 This is a schematic diagram of the opening and closing structure of the present invention; Figure 10 for Figure 8 Cross-sectional view; Figure 11 This is a cross-sectional view of the liquid inlet head and the vertical pipe of the present invention.

[0020] In the diagram: 1. First support frame; 2. Temperature control structure; 201. Insulated outer tank; 202. First connector; 203. Heat exchange tube; 204. Second connector; 3. Extraction tank; 4. End cap; 5. Stirring structure; 501. Stirring rod; 502. Mounting sleeve; 503. Stirring paddle; 504. Through hole; 505. Scraper; 506. Driving component; 6. Opening and closing structure; 601. Vertical pipe; 602. Guide pipe; 603. Telescopic component; 604. Piston rod; 605. Sliding sleeve; 606. Sealing plug; 7. Fixing sleeve; 608. Guide channel; 609. Spray nozzle; 610. Liquid inlet head; 611. Spring; 612. Scraper sleeve; 613. Sealing ring; 7. Separation structure; 701. Separation box; 702. Chip storage tank; 703. Material guide channel; 704. Chip discharge pipe; 705. Liquid storage tank; 706. Liquid discharge tank; 707. Liquid discharge pipe; 8. Booster pump; 9. Filter structure; 901. First connecting pipe; 902. Hydrocyclone; 903. Second connecting pipe; 904. Connecting flange; 10. Second support frame. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1-5As shown, the present invention provides a spirulina polysaccharide extraction device, including a first support frame 1, an extraction tank 3 with a temperature control structure 2 on the outside, the temperature control structure 2 being fixed to a second support frame 10, the temperature control structure 2 including an insulated outer barrel 201, the extraction tank 3 with an insulated outer barrel 201 installed on the outside, a spiral heat exchange tube 203 being arranged in the interlayer between the insulated outer barrel 201 and the extraction tank 3, a first connector 202 and a second connector 204 being fixed on the insulated outer barrel 201, the first connector 202 and the second connector 204 being respectively fixed to the two ends of the heat exchange tube 203; circulating hot water is introduced into the spiral heat exchange tube 203 through the first connector 202 and the second connector 204, the temperature is set to 70-80℃, and the material in the extraction tank 3 is heated and kept warm.

[0023] Specifically, such as Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the extraction tank 3 is equipped with a stirring structure 5 inside. The stirring structure 5 includes a stirring rod 501. An end cover 4 is installed on the top of the extraction tank 3. The stirring rod 501 is rotatably mounted on the end cover 4. A driving component 506 is fixed on the end cover 4. The driving component 506 is fixedly connected to the stirring rod 501. Two mounting sleeves 502 are installed on the stirring rod 501. The mounting sleeves 502 are equipped with spiral stirring paddles 503. The stirring paddles 503 are provided with multiple through holes 504. The two stirring paddles 503 are symmetrically arranged. When the stirring rod 501 drives the two stirring paddles 503 with opposite spiral directions to rotate through the mounting sleeves 502, the stirring paddles 503 promote the vertical disturbance of the algae mud mixture. At the same time, the through holes 504 ensure the strength of the disturbance, so that the stirring structure 5 can better stir the algae mud mixture. Multiple scrapers 505 are fixed on the outer side of each of the two stirring paddles 503. The lengths of the multiple scrapers 505 are different. The lengths of the two scrapers 505 arranged in each group are equal.

[0024] Specifically, such as Figure 3 , Figure 4 , Figure 9 , Figure 10 and Figure 11As shown, the opening and closing structure 6 is located at the bottom of the extraction tank 3. The opening and closing structure 6 includes a vertical pipe 601 and a guide pipe 602 located on the side wall of the vertical pipe 601. The vertical pipe 601 is fixed to the bottom of the extraction tank 3. A sealing ring 613 is installed between the vertical pipe 601 and the extraction tank 3. The guide pipe 602 is connected to the inlet of the booster pump 8. A sliding sleeve 605 is slidably provided inside the vertical pipe 601. A sealing plug 606 with a triangular cross-section is fitted on the sliding sleeve 605, which increases the contact area between the sealing plug 606 and the bottom of the extraction tank 3, thus improving the sealing performance. A fixing sleeve 607 is installed on the top of the sealing plug 606. The fixing sleeve 607 and the sliding sleeve 606 are connected. The 05 are connected by bolts; this facilitates the replacement of the sealing plug 606 after disassembling the fixing sleeve 607. A telescopic component 603 is installed at the bottom of the vertical pipe 601, and the top of the piston rod 604 of the telescopic component 603 is fixed to the sliding sleeve 605. When discharge is required, the PLC controller controls the piston rod 604 of the telescopic component 603 to retract downwards. The piston rod 604 drives the sliding sleeve 605 and the sealing plug 606 to move downwards, opening the drain port. During the downward sliding of the piston rod 604, the sliding sleeve 605 abuts against the scraper sleeve 612 and slides downwards along the vertical pipe 601, so that the sliding sleeve 605 moves to the bottom of the vertical pipe 601, ensuring that the drain port is fully open.

[0025] Specifically, such as Figure 4 , Figure 9 , Figure 10 and Figure 11 As shown, a scraper sleeve 612 is slidably mounted on the vertical pipe 601. The piston rod 604 is slidably connected to the scraper sleeve 612. The scraper sleeve 612 is located between the sliding sleeve 605 and the telescopic member 603. A spring 611 is installed between the scraper sleeve 612 and the telescopic member 603. The piston rod 604 passes through the spring 611. When the piston rod 604 slides downward, it drives the sliding sleeve 605 to slide downward in the vertical pipe 601 against the scraper sleeve 612, so that the sliding sleeve 605 slides to the bottom end of the vertical pipe 601. When the piston rod 604 slides upward, the spring 611 returns to its original position against the scraper sleeve 612, and the scraper sleeve 612 slides upward in the vertical pipe 601, so that the algae mud mixture at the bottom end of the vertical pipe 601 is discharged from the vertical pipe 601 into the guide pipe 602, effectively preventing liquid accumulation at the bottom end of the vertical pipe 601.

[0026] Specifically, such as Figure 3 , Figure 4 , Figure 9 , Figure 10 and Figure 11As shown, the interior of the vertical pipe 601 is provided with an annular guide groove 608. The interior of the vertical pipe 601 is provided with a circumferential array of multiple spray holes 609 facing the sealing plug 606 and the bottom drain port of the extraction tank 3. The side wall of the vertical pipe 601 is equipped with a liquid inlet head 610, which is connected to the guide groove 608. After each batch of material is discharged, the cleaning program is started by the PLC controller. The cleaning liquid (such as hot water or alkaline solution) is introduced into the liquid inlet head 610. The cleaning liquid enters the annular guide groove 608 inside the vertical pipe 601 and is sprayed out at high speed through the multiple spray holes 609 arranged in the circumferential array to flush and clean the sealing plug 606 and the bottom drain port of the extraction tank 3. During the cleaning process, the PLC controller controls the piston rod 604 of the telescopic component 603 to repeatedly extend and retract, driving the scraper sleeve 612 to move up and down reciprocally, mechanically scraping the inner wall of the vertical pipe 601. Combined with the flushing action of the spray hole 609, the residual algae mud in the vertical pipe 601 and the drain outlet is removed.

[0027] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, a separation structure 7 is provided on the first support frame 1, and a filter structure 9 is provided on the separation structure 7. The filter structure 9 includes a first connecting pipe 901, a hydrocyclone 902, a second connecting pipe 903, and a docking flange 904. A hydrocyclone 902 is installed on the separation box 701 of the separation structure 7. The first connecting pipe 901 is installed at the liquid inlet of the hydrocyclone 902. The second connecting pipe 903 is installed at the top of the hydrocyclone 902. The docking flange 904 is fixed at the bottom of the hydrocyclone 902. The docking flange 904 and the second connecting pipe 903... The bottom ends are all connected to the separation box 701. The booster pump 8 is installed inside the first support frame 1. The discharge port of the booster pump 8 is fixedly connected to the bottom end of the first connecting pipe 901. The inlet of the booster pump 8 is connected to the opening and closing structure 6. After the booster pump 8 pressurizes the algae-sludge mixture to 0.3-0.6MPa, it is tangentially sent into the hydrocyclone 902 through the inlet of the first connecting pipe 901. The algae-sludge mixture rotates at high speed inside the hydrocyclone 902 (the speed and separation efficiency are controlled by the inlet pressure of the booster pump 8), generating a centrifugal force field.

[0028] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, the separation structure 7 includes a separation box 701. The separation box 701 is fixed on a first support frame 1. The separation box 701 is equipped with a chip storage tank 702 and a liquid storage tank 705. A connecting flange 904 is correspondingly arranged with the chip storage tank 702, and a second connecting pipe 903 is correspondingly arranged with the liquid storage tank 705. The bottom end of the separation box 701 is provided with an inclined guide trough 703 and a drain trough 706. The guide trough 703 is located at the bottom end of the chip storage tank 702, and the drain trough 706 is located at the bottom end of the liquid storage tank 705. The separation box 701 is fixed on a first support frame 1. A chip removal pipe 704 is connected to the feed trough 703, and a drain pipe 707 connected to the drain trough 706 is installed on the separation box 701. The algal mud residue with higher density is thrown towards the inner wall of the hydrocyclone 902, moves downward in a spiral, and is discharged from the docking flange 904 at the bottom of the hydrocyclone 902 and enters the chip storage tank 702 of the separation box 701. The sugar-containing liquid with lower density moves upward towards the center of the hydrocyclone 902 and is discharged from the second connecting pipe 903 at the top of the hydrocyclone 902 and enters the liquid storage tank 705 of the separation box 701.

[0029] In use, the operator first pours the remaining algal sludge mixture (containing algal residue and liquid) after phycocyanin extraction into the extraction tank 3 from the top, and then closes the end cap 4. The material can be automatically added using a pumping structure. The temperature control structure 2 is activated, and circulating hot water is introduced into the spiral heat exchange tube 203 through the first connector 202 and the second connector 204, setting the temperature to 70-80℃ to heat and maintain the material in the extraction tank 3. Simultaneously, the drive unit 506 (a servo motor) is activated, driving the stirring rod 501 to rotate. The stirring rod 501... 1. The installation sleeve 502 drives two stirring paddles 503 with opposite spiral directions to rotate synchronously. During the stirring process, the upper stirring paddle 503 pushes the material downward and the lower stirring paddle 503 pushes the material upward, forming an up-and-down circulating flow. The through holes 504 on the stirring paddles 503 generate turbulent disturbances when the material passes through, promoting the full dissolution of polysaccharides. The scraper 505 on the outside of the stirring paddles 503 rotates with the stirring paddles 503, continuously scraping the inner wall of the extraction tank 3 to prevent algal mud from adhering to the tank wall. The extraction time is set to 1-3 hours to allow the polysaccharides to fully dissolve in the liquid phase. After extraction is completed, the PLC controller sends a command to the telescopic component 603 of the opening and closing structure 6 (the telescopic component 603 is a cylinder or hydraulic cylinder); in the initial state, the sealing plug 606 closes the drain port at the bottom of the extraction tank 3; when discharge is required, the PLC controller controls the piston rod 604 of the telescopic component 603 to retract downward, and the piston rod 604 drives the sliding sleeve 605 and the sealing plug 606 to move downward, opening the drain port; during the downward sliding of the piston rod 604, the sliding sleeve 605 abuts against the scraper sleeve 612 and slides downward along the vertical pipe 601, so that the sliding sleeve 605 moves to the bottom of the vertical pipe 601, ensuring that the drain port is fully open. Under gravity, the algae-mud mixture in the extraction tank 3 enters the vertical pipe 601 from the drain port and flows out through the guide pipe 602. When it is necessary to close the drain port, the PLC controller controls the piston rod 604 of the telescopic component 603 to extend upward. The piston rod 604 drives the sliding sleeve 605 and the sealing plug 606 to move upward, so that the sealing plug 606 re-seals the drain port. During the upward sliding of the piston rod 604, the spring 611 pushes the scraper sleeve 612 to slide upward and reset along the vertical pipe 601. The scraper sleeve 612 scrapes off the algae-mud adhering to the inner wall of the vertical pipe 601, preventing the algae-mud from depositing at the bottom of the vertical pipe 601. After each batch of discharge is completed, the cleaning program is started by the PLC controller. The cleaning solution (such as hot water or alkaline solution) is introduced into the inlet head 610. The cleaning solution enters the annular guide groove 608 inside the vertical pipe 601 and is sprayed out at high speed through multiple nozzles 609 arranged in a circumferential array to flush and clean the sealing plug 606 and the drain port at the bottom of the extraction tank 3. During the cleaning process, the PLC controller controls the piston rod 604 of the telescopic component 603 to repeatedly extend and retract, driving the scraper sleeve 612 to move up and down reciprocally, mechanically scraping the inner wall of the vertical pipe 601. Combined with the flushing action of the spray hole 609, the residual algae mud in the vertical pipe 601 and the drain outlet is removed, preparing for the next batch of production.

[0030] The algae-sludge mixture discharged from the guide pipe 602 enters the inlet of the booster pump 8; the PLC controller starts the booster pump 8, which pressurizes the algae-sludge mixture to 0.3-0.6MPa, and then sends it tangentially into the hydrocyclone 902 through the first connecting pipe 901 from the inlet of the hydrocyclone 902; the algae-sludge mixture rotates at high speed inside the hydrocyclone 902 (the speed and separation efficiency are controlled by the inlet pressure of the booster pump 8), generating a centrifugal force field. The denser algal sludge residue is thrown against the inner wall of the hydrocyclone 902, spiraling downwards and discharged from the docking flange 904 at the bottom of the hydrocyclone 902, entering the debris storage tank 702 of the separation box 701; the less dense sugar-containing liquid moves upwards towards the center of the hydrocyclone 902, is discharged from the second connecting pipe 903 at the top of the hydrocyclone 902, and enters the liquid storage tank 705 of the separation box 701; during the separation process, the PLC controller monitors the outlet pressure of the booster pump 8 in real time through a pressure sensor. When the pressure is lower than the set value (e.g., 0.3MPa), the PLC controller increases the driving frequency of the booster pump 8 to increase the pressure; when the pressure is higher than the set value (e.g., 0.6MPa), the PLC controller decreases the driving frequency of the booster pump 8 to maintain a stable separation effect.

[0031] The algal mud residue entering the chip storage tank 702 is deposited in the inclined feed trough 703 under the action of gravity, and is discharged and collected through the chip discharge pipe 704; the sugar-containing clear liquid entering the liquid storage tank 705 is collected along the inclined drain trough 706, discharged through the drain pipe 707, and sent to the subsequent polysaccharide purification process (such as membrane concentration, alcohol precipitation, drying, etc.).

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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. A spirulina polysaccharide extraction device, characterized in that, The system includes a first support frame (1) and a separation structure (7) mounted on the first support frame (1). The separation structure (7) is equipped with a filter structure (9). The filter structure (9) includes a first connecting pipe (901), a hydrocyclone (902), a second connecting pipe (903), and a docking flange (904). A hydrocyclone (902) is installed on the separation chamber (701) of the separation structure (7). The first connecting pipe (901) is installed at the inlet of the hydrocyclone (902). A second connecting pipe (903) is installed at the top of the hydrocyclone (902), and a docking flange (904) is fixed at the bottom of the hydrocyclone (902). The bottom ends of the docking flange (904) and the second connecting pipe (903) are both connected to the separation box (701). A booster pump (8) is installed inside the first support frame (1). The discharge port of the booster pump (8) is fixedly connected to the bottom end of the first connecting pipe (901), and the inlet of the booster pump (8) is connected to the opening and closing structure (6). The opening and closing structure (6) is located at the bottom of the extraction tank (3). The extraction tank (3) is provided with a temperature control structure (2) on the outside. The temperature control structure (2) is fixed to the second support frame (10). The extraction tank (3) is provided with a stirring structure (5) inside.

2. The Spirulina polysaccharide extraction device according to claim 1, characterized in that: The temperature control structure (2) includes an insulated outer barrel (201). The insulated outer barrel (201) is installed on the outside of the extraction tank (3). A spiral heat exchange tube (203) is provided in the interlayer between the insulated outer barrel (201) and the extraction tank (3). A first connector (202) and a second connector (204) are fixed on the insulated outer barrel (201). The first connector (202) and the second connector (204) are respectively fixed to the two ends of the heat exchange tube (203).

3. The Spirulina polysaccharide extraction device according to claim 1, characterized in that: The stirring structure (5) includes a stirring rod (501). An end cap (4) is installed on the top of the extraction tank (3). The stirring rod (501) is rotatably mounted on the end cap (4). A driving component (506) is fixed on the end cap (4). The driving component (506) is fixedly connected to the stirring rod (501). Two mounting sleeves (502) are installed on the stirring rod (501). A spiral stirring paddle (503) is provided on the mounting sleeve (502). Multiple through holes (504) are provided on the stirring paddle (503). The two stirring paddles (503) are symmetrically arranged. When the stirring rod (501) drives the two stirring paddles (503) with opposite spiral directions to rotate through the mounting sleeve (502), the stirring paddles (503) promote the up-and-down disturbance of the algae mud mixture. At the same time, the setting of the through holes (504) ensures the disturbance force, so that the stirring structure (5) has a better stirring effect on the algae mud mixture.

4. The Spirulina polysaccharide extraction device according to claim 3, characterized in that: Multiple scrapers (505) are fixed on the outer side of each of the two stirring paddles (503). The lengths of the multiple scrapers (505) are different, and the lengths of the two scrapers (505) set in each group are equal.

5. The Spirulina polysaccharide extraction device according to claim 1, characterized in that: The opening and closing structure (6) includes a vertical pipe (601) and a guide pipe (602) provided on the side wall of the vertical pipe (601). The vertical pipe (601) is fixed to the bottom end of the extraction tank (3). A sealing ring (613) is installed between the vertical pipe (601) and the extraction tank (3). The guide pipe (602) is connected to the inlet of the booster pump (8).

6. The Spirulina polysaccharide extraction device according to claim 5, characterized in that: The vertical tube (601) is provided with a sliding sleeve (605) inside. A sealing plug (606) with a triangular cross-section is fitted on the sliding sleeve (605). A fixing sleeve (607) is installed on the top of the sealing plug (606). The fixing sleeve (607) and the sliding sleeve (605) are connected by bolts.

7. The Spirulina polysaccharide extraction device according to claim 6, characterized in that: The bottom end of the vertical tube (601) is equipped with a telescopic component (603), and the top end of the piston rod (604) of the telescopic component (603) is fixed to the sliding sleeve (605).

8. The Spirulina polysaccharide extraction device according to claim 7, characterized in that: A scraper sleeve (612) is slidably mounted on the vertical pipe (601). The piston rod (604) is slidably connected to the scraper sleeve (612). The scraper sleeve (612) is located between the sliding sleeve (605) and the telescopic member (603). A spring (611) is installed between the scraper sleeve (612) and the telescopic member (603). The piston rod (604) passes through the spring (611). When the piston rod (604) slides downward, the piston rod (604) drives the sliding sleeve (612) to move downward. 05) The scraper sleeve (612) slides downward in the vertical tube (601), causing the sliding sleeve (605) to slide to the bottom of the vertical tube (601). When the piston rod (604) slides upward, the spring (611) pushes against the scraper sleeve (612) to reset, and the scraper sleeve (612) slides upward in the vertical tube (601), causing the algae mud mixture at the bottom of the vertical tube (601) to be discharged from the vertical tube (601) into the guide pipe (602), effectively preventing the accumulation of liquid at the bottom of the vertical tube (601).

9. The Spirulina polysaccharide extraction device according to claim 6, characterized in that: The vertical tube (601) has an annular guide groove (608) inside. The vertical tube (601) has a plurality of spray holes (609) arranged in a circular array inside, facing the sealing plug (606) and the bottom drain port of the extraction tank (3). The vertical tube (601) has an inlet head (610) installed on the side wall, and the inlet head (610) is connected to the guide groove (608).

10. The Spirulina polysaccharide extraction device according to claim 1, characterized in that: The separation structure (7) includes a separation box (701). The separation box (701) is fixed on the first support frame (1). The separation box (701) is provided with a chip storage tank (702) and a liquid storage tank (705) inside. The docking flange (904) is correspondingly arranged with the chip storage tank (702). The second connecting pipe (903) is correspondingly arranged with the liquid storage tank (705). The bottom end of the separation box (701) is provided with an inclined guide trough (703) and a drain trough (706). The guide trough (703) is located at the bottom end of the chip storage tank (702). The drain trough (706) is located at the bottom end of the liquid storage tank (705). The separation box (701) is fixed with a chip discharge pipe (704) communicating with the guide trough (703). The separation box (701) is installed with a drain pipe (707) communicating with the drain trough (706).

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