Rotary evaporator for enteromorpha polysaccharide extraction

Abstract

The utility model relates to the technical field of concentrated extracting solution, and discloses a rotary evaporator for extracting enteromorpha polysaccharide, which solves the problems in the background technology, and comprises a bottom plate, a rotary evaporator main body is arranged on the bottom plate, the rotary evaporator main body comprises a heating kettle and a distilling flask, the distillation bottle is arranged above the heating kettle, a rotating shaft is arranged in the distillation bottle and is arranged in the center of the distillation bottle, a scraper blade is arranged on the rotating shaft, an inner magnetic rotor is arranged on the rotating shaft, the bottom plate is provided with an extension part, the extension part is provided with a top plate parallel to the bottom plate, and the top plate is provided with an outer magnetic rotor. The top plate is provided with a driving motor, the output end of the driving motor is provided with an outer magnetic rotor, and the outer magnetic rotor is matched with the inner magnetic rotor. The rotary evaporator has the effect of solving the problems that when a traditional rotary evaporator is used for treating a high-viscosity solution, a liquid film is not uniform, the evaporation rate is reduced, and residues are prone to adhering to the wall.

Description

Technical Field

[0001] This utility model belongs to the field of concentrated extract technology, specifically a rotary evaporator for extracting polysaccharides from Ulva prolifera. Background Technology

[0002] As a natural product with important biological activity, *Ulva prolifera* polysaccharide has broad application prospects in the fields of medicine, food and cosmetics. Its extraction and purification process has always been a research hotspot. In the extraction process of *Ulva prolifera* polysaccharide, solution concentration is one of the key steps. Traditional methods usually use a rotary evaporator for concentration. The rotary evaporator rotates the evaporation flask and applies a vacuum to make the solvent evaporate rapidly at a lower temperature, thereby achieving solution concentration.

[0003] Patent CN 218339002 U2 discloses a rotary evaporator. However, during the concentration process of the *Ulva prolifera* polysaccharide solution, the viscosity of the solution increases significantly as the solvent evaporates. This is because the concentration of polysaccharide molecules in the solution gradually increases, the intermolecular interactions strengthen, and the fluidity of the solution deteriorates. This high-viscosity solution forms a thick liquid film during evaporation, increasing the resistance to heat transfer and thus reducing the evaporation rate. When the solution viscosity increases to a certain extent, the liquid film in the evaporation flask becomes uneven, with some areas having an excessively thick film and others having a relatively thin film. This uneven liquid film leads to uneven heat distribution, making the evaporation process uneven and further reducing the evaporation efficiency. Therefore, we propose a rotary evaporator for extracting *Ulva prolifera* polysaccharides. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides the following technical solution: a rotary evaporator for extracting polysaccharides from *Ulva prostrata*, comprising a base plate, on which a rotary evaporator body is mounted. The rotary evaporator body includes a heating pot and a distillation flask, the distillation flask being positioned above the heating pot. A rotating shaft is located inside the distillation flask and at its center. A scraper is mounted on the rotating shaft, and an inner magnetic rotor is mounted on the rotating shaft. The base plate has an extension, and the extension has a top plate parallel to the base plate. A drive motor is mounted on the top plate, and an outer magnetic rotor is mounted at the output end of the drive motor. The outer magnetic rotor is matched with the inner magnetic rotor.

[0005] Preferably, the inner magnetic rotor is a ring-shaped permanent magnet of the same size as the outer magnetic rotor, and the magnetic pole distribution corresponds to that of the outer rotor. This design ensures good magnetic coupling between the inner and outer magnetic rotors, which can efficiently transmit the power of the drive motor to the rotating shaft and the scraper, ensuring the stable rotation of the scraper.

[0006] Preferably, the scraper is an arc-shaped scraper, the arc of which matches the curvature of the inner wall of the distillation flask. A gap of 0.5 to 1 mm is reserved between the scraper head and the inner wall of the distillation flask, which can better fit the inner wall of the distillation flask, improve the cleaning effect of the scraper, reduce the residue of solution on the inner wall, and prevent the scraper from directly contacting the inner wall of the distillation flask, thus avoiding scratching the distillation flask, while ensuring that the scraper can effectively scrape off the solution on the inner wall.

[0007] Preferably, the scraper has three blades, which are symmetrically distributed at 120°. This can more effectively prevent the solution from remaining on the inner wall of the distillation flask and sticking to the wall, further improving evaporation efficiency and product quality. It also helps to maintain the balance of the rotating shaft, reduce vibration during equipment operation, and improve the stability and reliability of the equipment.

[0008] Preferably, the scraper is made of polytetrafluoroethylene or titanium alloy with a ceramic coating, which has good corrosion resistance and low coefficient of friction, effectively preventing the solution from corroding the scraper and reducing friction between the scraper and the inner wall of the distillation flask.

[0009] Preferably, the inner wall of the distillation flask is coated with a nano-hydrophobic coating made of fluorosilane modified material, which can reduce the adhesion of the solution to the inner wall of the distillation flask, reduce solution residue and wall sticking, and further improve evaporation efficiency and product quality.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] When the drive motor starts, the outer magnetic rotor begins to rotate. Since the magnetic poles of the inner and outer magnetic rotors correspond, the rotation of the outer magnetic rotor drives the inner magnetic rotor to rotate through the magnetic field. The rotation of the inner magnetic rotor then drives the rotating shaft and scraper to rotate. During the evaporation process, as the solvent evaporates, the viscosity of the solution gradually increases. The scraper continuously scrapes the solution off the inner wall of the distillation flask by rotating, preventing the solution from remaining on the inner wall and sticking to the wall. The nano-hydrophobic coating can significantly reduce the adhesion of the solution to the inner wall of the distillation flask. Due to the hydrophobicity of the coating, the solution forms droplets on the inner wall instead of a uniform liquid film, thereby reducing the residue and sticking of the solution. The distillation flask is placed above the heating pot, which heats the solution. During the heating process, the solvent gradually evaporates and is collected after condensation by the condenser. The rotation of the scraper makes the solution form a uniform liquid film on the inner wall of the distillation flask, improving the efficiency of heat transfer and thus accelerating the evaporation rate. This solves the problems of uneven liquid film, decreased evaporation rate, and easy residue sticking to the wall in traditional rotary evaporators when processing high-viscosity solutions. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a front view of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the distillation flask of this utility model;

[0015] In the diagram: 1. Base plate; 2. Rotary evaporator body; 3. Distillation flask; 4. Rotating shaft; 5. Scraper; 6. Extension section; 7. Drive motor; 8. External magnetic rotor; 9. Heating pot. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] Depend on Figure 1-2 The present invention includes a base plate 1, on which a rotary evaporator body 2 is mounted. The rotary evaporator body 2 includes a heating pot 9 and a distillation flask 3. The distillation flask 3 is positioned above the heating pot 9. A rotating shaft 4 is located inside the distillation flask 3 and is positioned at the center of the distillation flask 3. A scraper 5 is mounted on the rotating shaft 4, and an inner magnetic rotor is mounted on the rotating shaft 4. The base plate 1 has an extension 6, and the extension 6 has a top plate parallel to the base plate 1. A drive motor 7 is mounted on the top plate, and an outer magnetic rotor 8 is mounted at the output end of the drive motor 7. The outer magnetic rotor 8 is matched with the inner magnetic rotor.

[0018] The inner magnetic rotor is a ring-shaped permanent magnet of the same size as the outer magnetic rotor 8, and the magnetic pole distribution corresponds to that of the outer rotor. This design ensures good magnetic coupling between the inner and outer magnetic rotors, which can efficiently transmit the power of the drive motor to the rotating shaft and scraper, ensuring the stable rotation of the scraper.

[0019] The scraper 5 is an arc-shaped scraper, and the curvature of the scraper 5 matches the curvature of the inner wall of the distillation flask 3. A gap of 0.5 to 1 mm is reserved between the head of the scraper 5 and the inner wall of the distillation flask 3, which can better fit the inner wall of the distillation flask, improve the cleaning effect of the scraper, reduce the residue of solution on the inner wall, and prevent the scraper from directly contacting the inner wall of the distillation flask, avoiding scratching the distillation flask, while ensuring that the scraper can effectively scrape off the solution on the inner wall.

[0020] The scraper 5 has three blades, which are symmetrically distributed at 120°. This can more effectively prevent the solution from remaining on the inner wall of the distillation flask and sticking to the wall, further improving the evaporation efficiency and product quality. It also helps to maintain the balance of the rotating shaft, reduce vibration during equipment operation, and improve the stability and reliability of the equipment.

[0021] The scraper 5 is made of polytetrafluoroethylene or titanium alloy with a ceramic coating, which has good corrosion resistance and low coefficient of friction. It can effectively prevent the solution from corroding the scraper and reduce the friction between the scraper and the inner wall of the distillation flask.

[0022] The inner wall of the distillation flask 3 is coated with a nano-hydrophobic coating made of fluorosilane modified material, which can reduce the adhesion of the solution to the inner wall of the distillation flask, reduce solution residue and wall sticking, and further improve evaporation efficiency and product quality.

[0023] Working principle: When the drive motor 7 starts, the outer magnetic rotor 8 begins to rotate. Since the magnetic poles of the inner magnetic rotor and the outer magnetic rotor 8 correspond, the rotation of the outer magnetic rotor 8 drives the inner magnetic rotor to rotate through the magnetic field. The rotation of the inner magnetic rotor, in turn, drives the rotating shaft 4 and the scraper 5 to rotate. During evaporation, as the solvent evaporates, the viscosity of the solution gradually increases. The scraper 5 continuously scrapes away the solution from the inner wall of the distillation flask 3 by rotating, preventing solution residue and adhesion to the inner wall. The nano-hydrophobic coating significantly reduces the adhesion of the solution to the inner wall of the distillation flask 3. The hydrophobicity of the layer causes the solution to form droplets on the inner wall instead of a uniform liquid film, thus reducing solution residue and wall adhesion. The distillation flask 3 is placed above the heating pot 9, which heats the solution. During the heating process, the solvent gradually evaporates and is collected after condensation by the condenser. The rotation of the scraper 5 causes the solution to form a uniform liquid film on the inner wall of the distillation flask 3, improving the efficiency of heat transfer and thus accelerating the evaporation rate. This solves the problems of uneven liquid film, decreased evaporation rate, and easy residue adhesion when the traditional rotary evaporator is used to process high-viscosity solutions.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary evaporator for extracting Enteromorpha polysaccharide, comprising a base plate (1), characterized in that: The base plate (1) is provided with a rotary evaporator body (2), which includes a heating pot (9) and a distillation flask (3). The distillation flask (3) is located above the heating pot (9). A rotating shaft (4) is provided inside the distillation flask (3) and is located at the center of the distillation flask (3). A scraper (5) is provided on the rotating shaft (4) and an inner magnetic rotor is provided on the rotating shaft (4). The base plate (1) has an extension (6) and a top plate parallel to the base plate (1). A drive motor (7) is provided on the top plate. An outer magnetic rotor (8) is provided at the output end of the drive motor (7) and matches the inner magnetic rotor.

2. The rotary evaporator for extracting polysaccharides from Ulva prolifera according to claim 1, characterized in that: The inner magnetic rotor is a ring-shaped permanent magnet of the same size as the outer magnetic rotor (8), and the magnetic pole distribution corresponds to that of the outer rotor.

3. The rotary evaporator for extracting Enteromorpha polysaccharide according to claim 2, characterized in that: The scraper (5) is an arc-shaped scraper, and the arc of the scraper (5) matches the curvature of the inner wall of the distillation flask (3). A gap of 0.5 to 1 mm is reserved between the head of the scraper (5) and the inner wall of the distillation flask (3).

4. The rotary evaporator for extracting Enteromorpha polysaccharide according to claim 3, characterized in that: The scraper (5) has three blades, which are symmetrically distributed at 120°.

5. The rotary evaporator for extracting Enteromorpha polysaccharide according to claim 4, characterized in that: The scraper (5) is made of polytetrafluoroethylene or titanium alloy with a ceramic coating.

6. The rotary evaporator for extracting Enteromorpha polysaccharide according to claim 5, characterized in that: The inner wall of the distillation flask (3) is coated with a nano-hydrophobic coating, which is made of fluorosilane modified material.

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