Device for extracting chlorogenic acid substances from stems and leaves of sweet potatoes

Abstract

The utility model discloses a device for extracting chlorogenic acid substances from stems and leaves of sweet potatoes, which comprises a solvent tank, a raw material tank, a high-voltage pulse electric field device, a first connecting pipe and a second connecting pipe, and the solvent tank, the raw material tank and the high-voltage pulse electric field device are sequentially arranged from left to right. One end of the first connecting pipe is connected below the surface of the solvent tank, the other end of the first connecting pipe is connected above the surface of the raw material tank, and one end of the second connecting pipe is connected below the surface of the raw material tank. According to the device, feed liquid is fed into the high-voltage pulse electric field device through the second connecting pipe and passes through the pulse electric field, energy in the electric field can act in the feed liquid, the feed liquid subjected to the action of the electric field is discharged through the liquid outlet pipe and then is treated by the high-speed centrifugal machine, and supernatant liquid is taken for next purification treatment; the PEF-assisted organic solvent is used for extracting the chlorogenic acid of the sweet potato stems and leaves, so that the extraction process of the sweet potato stem and leaf powder can be completed at normal temperature, the extraction time is shortened, and the yield of chlorogenic acid substances is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction of chlorogenic acid substances from sweet potato stems and leaves, and particularly provides a device for extracting chlorogenic acid substances from sweet potato stems and leaves. Background Art

[0002] Sweet potato stems and leaves are the above-ground trailing parts of sweet potatoes, which can be harvested multiple times a year. The yield is equivalent to that of underground tubers, and they are rich in nutrients such as protein, dietary fiber, vitamins, and minerals. However, the utilization rate of sweet potato stems and leaves in China is seriously insufficient at present. Only a small part of the tender stems and leaves are used as green vegetables, while 95% - 98% of the old stems and leaves are discarded during the harvest period, and the remaining 2% - 5% are used as animal feed, resulting in serious waste of resources. How to develop and utilize sweet potato stems and leaves with high value is the key to the transformation and upgrading of the sweet potato industry. Research shows that in addition to general nutrients, sweet potato stems and leaves also contain a large amount of polyphenolic substances, more than 70% of which are chlorogenic acid and its derivatives. Chlorogenic acid substances are a kind of phenylpropanoid secondary metabolite produced through the shikimate pathway during the aerobic respiration process in plants, and have various biological activities such as antioxidant, blood sugar and lipid lowering, and diabetes inhibition. Therefore, efficiently extracting chlorogenic acid substances from sweet potato stems and leaves and developing functional foods aiming at health promotion with them as functional materials are effective ways to utilize sweet potato stems and leaves with high value.

[0003] At present, organic solvents are commonly used in industry to extract chlorogenic acid substances from sweet potato stems and leaves, but this method has disadvantages such as large solvent consumption, difficult recovery, and incomplete extraction. To solve the above problems, researchers have tried to combine some new non-thermal processing technologies with the organic solvent method to improve the extraction efficiency of active substances and reduce the use of organic solvents. High intensity pulsed electric field (PEF) is a sustainable and environmentally friendly non-thermal processing technology. At present, the application of PEF technology in the food industry is gradually mature and perfect, mainly used for the sterilization and enzyme inactivation of fruit and vegetable juices, the degradation of pesticide residues and food preservation, etc. In recent years, more and more scholars have applied it to the extraction of active ingredients.

[0004] In view of the above situation, the present utility model is proposed. Content of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a device for extracting chlorogenic acid substances from sweet potato stems and leaves, which is used to solve the problems mentioned in the background art.

[0006] To solve the above technical problems, the present utility model provides the following technical solutions.

[0007] The utility model provides a device for extracting chlorogenic acid substances from sweet potato stems and leaves, which comprises a solvent tank, a raw material tank, a high-voltage pulsed electric field device, a first connecting pipe and a second connecting pipe. The solvent tank, the raw material tank and the high-voltage pulsed electric field device are arranged in sequence from left to right. One end of the first connecting pipe is connected below the surface of the solvent tank, and the other end is connected above the surface of the raw material tank. One end of the second connecting pipe is connected below the surface of the raw material tank, and the other end is connected above the left side surface of the high-voltage pulsed electric field device;

[0008] A liquid pump is installed at the middle position of the first connecting pipe, a peristaltic pump is installed at the middle position of the second connecting pipe. A first valve is arranged at one end of the first connecting pipe close to the solvent tank, a second valve is arranged at one end of the first connecting pipe close to the raw material tank, a third valve is arranged at one end of the second connecting pipe close to the raw material tank, and a fourth valve is arranged at one end of the second connecting pipe close to the high-voltage pulsed electric field device;

[0009] A top plate is horizontally arranged at the top entrance position of the raw material tank, and a motor is vertically arranged at the central position of the upper surface of the top plate. The driving shaft of the motor faces downward and is provided with a stirring structure;

[0010] A liquid outlet pipe is further arranged below the right side surface of the high-voltage pulsed electric field device, and a tank cover is arranged at the mouth of the solvent tank.

[0011] Preferably, the stirring structure comprises a main shaft and stirring rods. A shaft seat is arranged at the central position of the inner bottom surface of the raw material tank. The main shaft is vertically located in the raw material tank and at the vertical central axis position of the raw material tank. The lower end of the main shaft is movably inserted into the shaft seat, and the upper end of the main shaft is connected to the driving shaft of the motor through a coupling. The stirring rods are arranged on the surface of the main shaft.

[0012] Preferably, the stirring rods are all horizontal. One end of the stirring rod far from the main shaft is close to the inner wall of the raw material tank. Multiple layers of the stirring rods are evenly distributed at equal intervals from bottom to top. Each layer of the stirring rods is evenly distributed in a circumferential manner along the circumferential surface of the main shaft at equal intervals. Each layer of the stirring rods has three to five.

[0013] Preferably, the stirring rods of the upper layer and the lower layer are staggered.

[0014] Preferably, a tank cover is movably arranged at the mouth of the raw material tank.

[0015] Preferably, a PET treatment chamber is arranged inside the high-voltage pulsed electric field device.

[0016] Preferably, the first valve, the second valve, the third valve and the fourth valve are all manual valves.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The solvent tank is filled with 80% ethanol, and the raw material tank is filled with raw materials for extraction, wherein the raw materials are sweet potato stem and leaf powder obtained by washing, drying and crushing the sweet potato stems and leaves. The liquid pump is operated, and the ethanol in the solvent tank can enter the raw material tank through the first connecting pipe, and the ethanol can be mixed with the raw materials. The motor is operated to drive the main shaft to rotate, and all the stirring rods rotate together with the main shaft. Under the full stirring action of the stirring rods, the ethanol can be fully and evenly mixed with the raw materials.

[0019] After the stirring and mixing is completed, the peristaltic pump works to send the liquid into the high-voltage pulse electric field device through the second connecting pipe. The liquid passes through the pulse electric field, and the energy in the electric field can act on the liquid. The liquid that has been acted on by the electric field is discharged through the liquid outlet pipe, and then processed by the high-speed centrifuge. The supernatant liquid on the top is taken and canned to obtain the finished product.

[0020] PEF-assisted organic solvent extraction of chlorogenic acid from sweet potato stems and leaves can complete the extraction process of sweet potato stem and leaf powder at room temperature, shorten the extraction time, and increase the yield of chlorogenic acid substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall three-dimensional diagram of the utility model;

[0022] Figure 2 This is a cutaway perspective view of the raw material tank of the utility model;

[0023] Figure 3 This is a three-dimensional diagram of the axle seat of the utility model.

[0024] In the figure: 1. Solvent tank; 10. Tank cover; 11. First connecting pipe; 12. Liquid pump; 13. First valve; 14. Second valve; 2. Raw material tank; 21. Top plate; 22. Motor; 23. Main shaft; 24. Stirring rod; 25. Shaft seat; 26. Second connecting pipe; 27. Peristaltic pump; 28. Third valve; 29. Fourth valve; 3. High-voltage pulse electric field device; 31. Liquid outlet pipe. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0027] As Figures 1-3 shown, a device for extracting chlorogenic acid substances from sweet potato stems and leaves includes a solvent tank 1, a raw material tank 2, a high-voltage pulsed electric field device 3, a first connecting pipe 11, and a second connecting pipe 26. The solvent tank 1, the raw material tank 2, and the high-voltage pulsed electric field device 3 are arranged in sequence from left to right. One end of the first connecting pipe 11 is connected below the surface of the solvent tank 1, and the other end is connected above the surface of the raw material tank 2. One end of the second connecting pipe 26 is connected below the surface of the raw material tank 2, and the other end is connected above the left side surface of the high-voltage pulsed electric field device 3. Ethanol in the solvent tank 1 enters the raw material tank 2 through the first connecting pipe 11, and the liquid in the raw material tank 2 enters the high-voltage pulsed electric field device through the second connecting pipe 26;

[0028] A liquid pump 12 is installed at the middle position of the first connecting pipe 11, and a peristaltic pump 27 is installed at the middle position of the second connecting pipe 26. A first valve 13 is provided at one end of the first connecting pipe 11 close to the solvent tank 1, a second valve 14 is provided at one end of the first connecting pipe 11 close to the raw material tank 2, a third valve 28 is provided at one end of the second connecting pipe 26 close to the raw material tank 2, and a fourth valve 29 is provided at one end of the second connecting pipe 26 close to the high-voltage pulsed electric field device 3;

[0029] A top plate 21 is horizontally arranged at the inlet position on the top surface of the raw material tank 2. A motor 22 is vertically arranged at the central position on the upper surface of the top plate 21. The driving shaft of the motor 22 faces downward and is provided with a stirring structure. The top plate 21 supports the motor 22. When the motor 22 works, it can drive the stirring structure to rotate;

[0030] A liquid outlet pipe 31 is further provided below the right side surface of the high-voltage pulsed electric field device 3, and a tank cover 10 is provided at the mouth of the solvent tank 1.

[0031] The stirring structure includes a main shaft 23 and stirring rods 24. A shaft seat 25 is arranged at the central position on the inner bottom surface of the raw material tank 2. The main shaft 23 is vertically located in the raw material tank 2 and is at the vertical central axis position of the raw material tank 2. The lower end of the main shaft 23 is movably inserted into the shaft seat 25, and the upper end of the main shaft 23 is connected to the driving shaft of the motor 22 through a coupling. The stirring rods 24 are arranged on the surface of the main shaft 23.

[0032] The stirring rods 24 are all in a horizontal state. One end of the stirring rod 24 far from the main shaft 23 is close to the inner wall of the raw material tank 2. The multi-layer stirring rods 24 are evenly distributed at equal intervals from bottom to top. Each layer of stirring rods 24 is evenly distributed in a circumferential manner along the circumferential surface of the main shaft 23 at equal intervals. Each layer of stirring rods 24 has three to five.

[0033] The stirring rods 24 in the upper layer and the stirring rods 24 in the lower layer are staggeredly distributed. The stirring rods 24 evenly distributed at multiple positions can stir the ethanol and the raw materials evenly.

[0034] A tank cover is movably arranged at the mouth of the raw material tank 2; a PET treatment chamber is arranged inside the high-voltage pulsed electric field device; the first valve 13, the second valve 14, the third valve 28 and the fourth valve 29 are all manual valves.

[0035] In summary: The solvent tank 1 is filled with 80% ethanol, and the raw material tank 2 is filled with the raw materials for extraction. The raw materials are sweet potato stem and leaf powder obtained by washing, drying and pulverizing sweet potato stems and leaves. The liquid pump 12 works, and the ethanol in the solvent tank 1 can enter the raw material tank 2 through the first connecting pipe 11. The ethanol can be mixed with the raw materials. The motor 22 works to drive the main shaft 23 to rotate. All the stirring rods 24 rotate together with the main shaft 23. Under the full stirring action of the stirring rods 24, the ethanol can be fully and evenly mixed with the raw materials;

[0036] After the stirring and mixing are completed, the peristaltic pump 27 works, and can send the liquid material into the high-voltage pulsed electric field device 3 through the second connecting pipe 26. The liquid material passes through the pulsed electric field, and the energy in the electric field can act on the liquid material. The liquid material after the action of the electric field is discharged through the liquid outlet pipe 31, and then is processed by a high-speed centrifuge, and the upper clear liquid is taken for the next purification treatment;

[0037] PEF-assisted organic solvent extraction of chlorogenic acid from sweet potato stems and leaves can complete the leaching process of sweet potato stem and leaf powder at room temperature, shorten the leaching time, and improve the yield of chlorogenic acid substances.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An apparatus for extracting chlorogenic acid substances from sweet potato stems and leaves, characterized in that: It includes a solvent tank (1), a raw material tank (2), a high-voltage pulsed electric field device (3), a first connecting pipe (11) and a second connecting pipe (26). The solvent tank (1), the raw material tank (2) and the high-voltage pulsed electric field device (3) are arranged in sequence from left to right. One end of the first connecting pipe (11) is connected below the surface of the solvent tank (1), and the other end is connected above the surface of the raw material tank (2). One end of the second connecting pipe (26) is connected below the surface of the raw material tank (2), and the other end is connected above the left side surface of the high-voltage pulsed electric field device (3); A liquid pump (12) is installed at the middle position of the first connecting pipe (11), a peristaltic pump (27) is installed at the middle position of the second connecting pipe (26), a first valve (13) is arranged at one end of the first connecting pipe (11) close to the solvent tank (1), a second valve (14) is arranged at one end of the first connecting pipe (11) close to the raw material tank (2), a third valve (28) is arranged at one end of the second connecting pipe (26) close to the raw material tank (2), and a fourth valve (29) is arranged at one end of the second connecting pipe (26) close to the high-voltage pulsed electric field device (3); A top plate (21) is horizontally arranged at the top entrance position of the raw material tank (2), a motor (22) is vertically arranged at the central position of the upper surface of the top plate (21), and the driving shaft of the motor (22) faces downward and is provided with a stirring structure; A liquid outlet pipe (31) is further arranged below the right side surface of the high-voltage pulsed electric field device (3), and a tank cover (10) is arranged at the mouth of the solvent tank (1).

2. The device for extracting chlorogenic acid substances from sweet potato stems and leaves according to claim 1, characterized in that: The stirring structure includes a main shaft (23) and stirring rods (24). A shaft seat (25) is arranged at the central position of the inner bottom surface of the raw material tank (2). The main shaft (23) is vertically located inside the raw material tank (2), and the main shaft (23) is located at the vertical central axis position of the raw material tank (2). The lower end of the main shaft (23) is movably inserted into the shaft seat (25), the upper end of the main shaft (23) is connected to the driving shaft of the motor (22) through a coupling, and the stirring rods (24) are arranged on the surface of the main shaft (23).

3. The device for extracting chlorogenic acid substances from sweet potato stems and leaves according to claim 2, wherein: The stirring rods (24) are all horizontal, one end of the stirring rod (24) far from the main shaft (23) is close to the inner wall of the raw material tank (2), and multiple layers of the stirring rods (24) are evenly distributed at equal intervals from bottom to top. Each layer of the stirring rods (24) is evenly distributed in a circumferential manner along the circumferential surface of the main shaft (23) at equal intervals, and each layer of the stirring rods (e.g., 24) has three to five.

4. The device for extracting chlorogenic acid substances from sweet potato stems and leaves according to claim 3, wherein: The stirring rods (24) of the upper layer and the stirring rods (24) of the lower layer are staggeredly distributed.

5. The device for extracting chlorogenic acid substances from sweet potato stems and leaves according to claim 1, wherein: A tank cover is movably arranged at the mouth of the raw material tank (2).

6. The device for extracting chlorogenic acid substances from sweet potato stems and leaves according to claim 1, characterized in that: A PET treatment chamber is arranged inside the high-voltage pulsed electric field device.

7. The device for extracting chlorogenic acid substances from sweet potato stems and leaves according to claim 1, wherein: The first valve (13), the second valve (14), the third valve (28) and the fourth valve (29) are all manual valves.

Images