High content epa / dha product isolation and purification apparatus

Abstract

This invention relates to a high-content EPA / DHA product separation and purification device, belonging to the field of extraction and purification equipment technology. It includes a distillation cylinder with a heating jacket inside. A film-forming mechanism is located at the upper end of the cylinder's inner cavity, utilizing a preheated liquid jet to form an atomized liquid film skirt, which, in conjunction with the heating jacket, heats the raw material. An inclined guide plate is located at the lower end of the cylinder's inner cavity, with multiple through holes arranged in a ring array. Above the guide plate is a heavy phase collection area, with a heavy phase discharge pipe on one side. Below the guide plate is a light phase collection area, with a light phase discharge pipe on one side. A condensation mechanism is installed inside the distillation cylinder. This solution solves the problem that direct heating of the raw material can lead to a slow boiling point, resulting in impurities contaminating the EPA / DHA and affecting its purity.

Description

Technical Field

[0001] This utility model relates to the field of extraction and purification equipment technology, specifically a separation and purification device for high-content EPA / DHA products. Background Technology

[0002] The EPA / DHA product separation and purification device is a complete set of equipment specifically designed for extracting and purifying eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) from raw materials such as fish oil and algal oil. It combines processes such as distillation (e.g., molecular distillation), chromatographic separation (e.g., adsorption chromatography, ion exchange chromatography), and extraction (e.g., supercritical CO2 extraction) to utilize the differences in physicochemical properties of EPA and DHA, such as molecular weight, polarity, and boiling point, to separate them from other fatty acids and impurities in the raw materials, ultimately obtaining high-purity EPA and DHA monomers or a mixture of products in a specific ratio.

[0003] For example, the Chinese authorized patent CN217187957U, entitled "A Short-Path Molecular Distillation Apparatus for Silicon Oil Purification," includes a fixed base plate with a support frame mounted on its top. A second outlet is installed on one side of the bottom of the distiller body, and a first outlet is installed on the other side. A light component collection box is provided at one end of the bottom of the first outlet, and a sealing structure is provided at the connection between the light component collection box and the first outlet. The distiller body is clamped at its clamping groove by a clamping plate, and a certain degree of tightness is achieved through the cooperation of the mounting bolt and the positioning plate.

[0004] While the existing technologies can separate EPA and DHA, the temperature of the raw materials at the feed point is generally low. Direct contact between the film-forming device and the heated wall can lead to a slow boiling point, which causes short-chain saturated fatty acids, monoglycerides, some free fatty acids, and plasticizers to mix into the heavy phase, resulting in a decrease in the purity of EPA / DHA. Therefore, it does not meet the current requirements. To address this, we have proposed a high-content EPA / DHA product separation and purification device. Utility Model Content

[0005] The purpose of this invention is to provide a high-content EPA / DHA product separation and purification device to solve the problem mentioned in the background art that the boiling point of raw materials is slow to reach when directly heated, which causes impurities to mix into EPA / DHA and affect its purity.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-content EPA / DHA product separation and purification device, including a distillation cylinder, a heating jacket provided in the inner wall of the distillation cylinder, a film-forming mechanism provided at the upper end of the inner cavity of the distillation cylinder, which uses a preheated liquid jet to form an atomized liquid film skirt, and heats the raw material in conjunction with the heating jacket, an inclined guide plate provided at the lower end of the inner cavity of the distillation cylinder, the guide plate having multiple through holes arranged in a ring array, a heavy phase collection area above the guide plate, and a heavy phase discharge pipe provided on one side of the heavy phase collection area, a light phase collection area below the guide plate, and a light phase discharge pipe provided on one side of the light phase collection area, and a condensation mechanism installed inside the distillation cylinder.

[0007] Preferably, the film-forming mechanism includes multiple annularly distributed swirl tubes. The surface of each swirl tube is provided with multiple spirally distributed feed holes, which are inclined. The outside of each swirl tube is provided with three vertically equidistant partitions. The outer wall of the partitions is sealed to the inner wall of the distillation tube, dividing the space where the swirl tube is located into an upper feed chamber and a lower steam chamber.

[0008] Preferably, a feed pipe is provided at the upper end of one side of the outer wall of the distillation cylinder, and the feed pipe is connected to the feed chamber. A high-temperature steam inlet pipe is provided below the feed pipe, and the high-temperature steam inlet pipe is connected to the steam chamber.

[0009] Preferably, the condensation mechanism includes an upper water distribution plate disposed below the film-forming mechanism. The lower end of the upper water distribution plate is provided with a plurality of condensing tubes arranged in a ring array. The condensing tubes pass through a through hole, and the diameter of the through hole is larger than that of the condensing tubes. The bottom of the distillation cylinder is provided with a base, and the interior of the base is provided with a condensate chamber. The upper end of the interior of the condensate chamber is fixedly installed with a lower water distribution plate, and the condensing tubes are connected to the lower water distribution plate. Circulation pipes are provided at both the front and rear of the lower water distribution plate, and a circulation pump is installed on one of the circulation pipes.

[0010] Preferably, the rear end of the base is provided with a medium refrigeration mechanism, which includes an air compressor, a condenser and an expansion valve. An evaporator is installed at the bottom of the condensate chamber, and the evaporator, air compressor, condenser and expansion valve are connected by a medium circulation pipe.

[0011] Preferably, a temperature sensor for detecting the temperature of the condensate is installed on the inner wall of the condensate chamber.

[0012] Preferably, a vacuum tube connected to the distillation cylinder is installed at the upper end of the light phase discharge pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This invention redesigns the film-forming device in existing molecular distillation equipment as multiple swirling film cylinders. Three equidistant baffles divide the space within the distillation cylinder into a feed chamber and a steam chamber. Raw materials such as fish oil and algal oil enter the feed chamber through the feed pipe. The liquid pressure is higher than the pressure in the feed chamber. Under this pressure difference, the liquid enters the inner wall of the feed chamber through the feed orifice at the upper end of the swirling film cylinder. Due to the high flow velocity, a jet motion is generated at the outlet of the feed orifice, subsequently forming a water film that swirls downwards along the inside of the swirling film cylinder. At this time, high-temperature steam enters the steam chamber through the high-temperature steam inlet pipe. The steam then jets into the interior through the feed orifice at the lower end of the swirling film cylinder, producing a vigorous mixing and heating effect on the passing liquid. This process significantly increases the temperature of the raw material and accelerates the rotation of the liquid film. Due to centrifugal force, a hollow rotating liquid film skirt is formed at the bottom of the rotary film tube, which is evenly dispersed in a mist on the inner wall of the distillation tube, achieving secondary heating. Compared with traditional film-forming methods, the liquid film is thinner and more evenly distributed, greatly increasing the contact area between the raw material and the heating surface, and improving the separation efficiency of light and heavy phases. At the same time, high-temperature steam mixes with the raw material in the counter-current jet through the small hole at the bottom of the rotary film tube, instantly transferring heat and rapidly raising the temperature of the raw material. This reduces the residence time in the high-temperature environment and reduces the risk of EPA / DHA oxidation and decomposition. Meanwhile, the steam impact accelerates the rotation of the liquid film, and the centrifugal force further thins the liquid film, enhancing mass and heat transfer.

[0015] 2. This utility model features an evaporator installed at the bottom of the condensate chamber, with a built-in temperature sensor to monitor the condensate temperature in real time. If the condensate temperature exceeds a set value, the compressor inside the medium refrigeration mechanism compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure state, which is then sent to the condenser for heat dissipation and condensation into a high-pressure liquid. The high-pressure liquid is then throttled and depressurized by the expansion valve, transforming into a low-temperature, low-pressure gas-liquid mixture before entering the evaporator. In the evaporator, the refrigerant absorbs heat from the condensate chamber and evaporates into gas, thereby effectively reducing the condensate temperature. This ensures rapid condensation of the light phase vapor during molecular distillation, improving the EPA / DHA separation efficiency. Furthermore, the constant condensate temperature prevents a decrease in separation effect due to temperature fluctuations, ensuring product purity. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is another perspective view of the present invention;

[0018] Figure 3 This is a perspective view of the internal structure of this utility model;

[0019] Figure 4 This is a front view of the internal structure of this utility model.

[0020] In the diagram: 1. Distillation cylinder; 2. Feed pipe; 3. High-temperature steam inlet pipe; 4. Heavy phase outlet pipe; 5. Light phase outlet pipe; 6. Vacuum tube; 7. Base; 8. Medium refrigeration mechanism; 9. Medium circulation pipe; 10. Baffle plate; 11. Feed chamber; 12. Steam chamber; 13. Swirl film cylinder; 14. Feed orifice; 15. Condensation mechanism; 16. Upper water distribution pan; 17. Condensing tube; 18. Guide plate; 19. Through hole; 20. Lower water distribution pan; 21. Circulation pipe; 22. Condensate chamber; 23. Evaporator; 24. Heating jacket. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4 This utility model provides an embodiment of a high-content EPA / DHA product separation and purification device, including a distillation cylinder 1, a heating jacket 24 in the inner wall of the distillation cylinder 1, a film-forming mechanism at the upper end of the inner cavity of the distillation cylinder 1, which uses a preheated liquid jet to form an atomized liquid film skirt, and heats the raw material in conjunction with the heating jacket 24. The lower end of the inner cavity of the distillation cylinder 1 is provided with an inclined guide plate 18, and the guide plate 18 is provided with a plurality of through holes 19 arranged in a ring array. Above the guide plate 18 is a heavy phase collection area, and a heavy phase discharge pipe 4 is provided on one side of the heavy phase collection area. Below the guide plate 18 is a light phase collection area, and a light phase discharge pipe 5 is provided on one side of the light phase collection area. A condensation mechanism 15 is installed inside the distillation cylinder 1.

[0023] The raw material forms a liquid film through the film-forming mechanism. The heating jacket 24 heats the liquid film through heat conduction, causing the light phase component to evaporate. The vapor rises and is cooled into liquid by the condensing mechanism 15. Under the action of gravity, the light phase liquid passes through the through hole 19 of the guide plate 18 and falls into the light phase collection area, and is discharged through the light phase discharge pipe 5. The heavy phase component, due to its high boiling point, is not easily evaporated and slides down the guide plate 18 to the heavy phase collection area, and is collected through the heavy phase discharge pipe 4. Through the liquid film heating and guide plate separation design, the heating area of ​​the raw material is increased, the separation efficiency is improved, and the heavy and light phases are collected separately, reducing component mixing and ensuring the purity of EPA / DHA products.

[0024] Please see Figure 3 and Figure 4The film-forming mechanism includes multiple annularly distributed film-forming cylinders 13. The surface of the film-forming cylinder 13 is provided with multiple spirally distributed feed holes 14, and the feed holes 14 are inclined. The outside of the film-forming cylinder 13 is provided with three vertically and equally distributed partitions 10. The outer wall of the partitions 10 is sealed to the inner wall of the distillation cylinder 1, dividing the space where the film-forming cylinder 13 is located into an upper feed chamber 11 and a lower steam chamber 12. A feed pipe 2 is provided at the upper end of one side of the outer wall of the distillation cylinder 1, and the feed pipe 2 is connected to the feed chamber 11. A high-temperature steam inlet pipe 3 is provided below the feed pipe 2, and the high-temperature steam inlet pipe 3 is connected to the steam chamber 12.

[0025] Raw materials such as raw fish oil and algal oil enter the feed chamber 11 through the feed pipe 2. The pressure of the liquid is higher than that of the feed chamber 11. Under this pressure difference, the liquid enters the inner wall of the feed chamber 11 through the feed hole 14 at the upper end of the swirl film cylinder 13. Due to the high flow velocity, a jet motion is generated at the outlet of the feed hole 14. Then, a water film is formed inside the swirl film cylinder 13 and flows downward. At this time, high-temperature steam enters the steam chamber 12 from the high-temperature steam inlet pipe 3. The steam is jetted into the interior through the feed hole 14 at the lower end of the swirl film cylinder 13, which produces a violent mixing and heating effect on the liquid passing through, which greatly increases the temperature of the raw materials and accelerates the rotation of the liquid film. Due to the centrifugal force, a hollow rotating liquid film skirt is formed at the bottom of the swirl film cylinder 13 and is uniformly dispersed in a mist on the inner wall of the distillation cylinder 1, realizing secondary heating and reducing the oxidation risk of heat-sensitive EPA / DHA. The mist-like liquid film formed by centrifugal force greatly increases the contact area between the raw materials and the heating jacket 24, enhances the mass and heat transfer efficiency, and improves the separation effect.

[0026] Please see Figure 3 and Figure 4 The condensation mechanism 15 includes an upper water distribution plate 16 located below the film-forming mechanism. The lower end of the upper water distribution plate 16 is provided with a plurality of condensing tubes 17 arranged in a ring array. The condensing tubes 17 pass through the through hole 19, and the diameter of the through hole 19 is larger than that of the condensing tubes 17. The bottom of the distillation cylinder 1 is provided with a base 7. The interior of the base 7 is provided with a condensation water chamber 22. The upper end of the interior of the condensation water chamber 22 is fixedly installed with a lower water distribution plate 20, and the condensing tubes 17 are connected to the lower water distribution plate 20. The lower water distribution plate 20 is provided with circulation pipes 21 at both the front and rear. One of the circulation pipes 21 is equipped with a circulation pump.

[0027] The low-temperature condensate circulating inside the condenser tube 17 absorbs the heat of the steam, causing the steam to cool and liquefy. The liquefied light phase liquid flows down the wall of the condenser tube 17, is discharged from the bottom of the distillation cylinder 1 and from the light phase discharge pipe 5. The condensate is circulated through the circulation pipe 21 and the circulation pump, continuously carrying away heat.

[0028] Please see Figure 2 and Figure 3The rear end of the base 7 is provided with a medium cooling mechanism 8, which contains an air compressor, a condenser and an expansion valve. An evaporator 23 is installed at the bottom of the condensate chamber 22, and the evaporator 23, the air compressor, the condenser and the expansion valve are connected by a medium circulation pipe 9. A temperature sensor for detecting the temperature of the condensate is installed on the inner wall of the condensate chamber 22.

[0029] The medium refrigeration mechanism 8 operates based on a vapor compression refrigeration cycle. The air compressor compresses the refrigerant into a high-temperature, high-pressure gas, which is then sent to the condenser to dissipate heat and condense into a high-pressure liquid. After being throttled and depressurized by the expansion valve, the low-temperature, low-pressure refrigerant enters the evaporator 23. In the evaporator 23, the refrigerant absorbs heat from the condensate chamber, cooling the condensate. The evaporated refrigerant gas is then re-inhaled by the air compressor, and the cycle continues. A temperature sensor monitors the condensate temperature in real time, providing feedback to adjust the operating status of the refrigeration mechanism, precisely controlling the condensate temperature to ensure efficient and stable operation of the condensing mechanism and improve the condensation effect of the light phase vapor.

[0030] Please see Figure 1 A vacuum tube 6, connected to the distillation cylinder 1, is installed at the upper end of the light phase discharge pipe 5. The vacuum tube 6 is connected to an external vacuum system. By evacuating air, the internal pressure of the distillation cylinder 1 is reduced, creating a high vacuum environment. This lowers the boiling point of the light phase components in the raw material, making them easier to evaporate. After the light phase vapor condenses into liquid, it is discharged from the device through the light phase discharge pipe 5 under the action of gravity and vacuum pressure difference. The high vacuum environment enables low-temperature distillation, effectively protecting the heat-sensitive EPA / DHA from high-temperature damage. The vacuum pressure difference accelerates the discharge of the light phase liquid, improving separation efficiency and reducing the residue of the light phase in the distillation cylinder.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-content EPA / DHA product separation and purification device, comprising a distillation cylinder (1), wherein a heating jacket (24) is provided in the inner wall of the distillation cylinder (1), characterized in that: The upper end of the inner cavity of the distillation cylinder (1) is provided with a film-forming mechanism, which uses a preheated liquid jet to form an atomized liquid film skirt, and uses a heating jacket (24) to heat the raw material. The lower end of the inner cavity of the distillation cylinder (1) is provided with an inclined guide plate (18). The guide plate (18) is provided with multiple through holes (19) arranged in a ring array. Above the guide plate (18) is a heavy phase collection area, and a heavy phase discharge pipe (4) is provided on one side of the heavy phase collection area. Below the guide plate (18) is a light phase collection area, and a light phase discharge pipe (5) is provided on one side of the light phase collection area. A condensation mechanism (15) is installed inside the distillation cylinder (1).

2. The high-content EPA / DHA product separation and purification device according to claim 1, characterized in that: The film-forming mechanism includes multiple annularly distributed swirl film cylinders (13). The surface of the swirl film cylinders (13) is provided with multiple spirally distributed feed holes (14), and the feed holes (14) are inclined. The outside of the swirl film cylinders (13) is provided with three vertically equidistant partitions (10). The outer wall of the partitions (10) is sealed to the inner wall of the distillation cylinder (1), dividing the space where the swirl film cylinders (13) are located into an upper feed chamber (11) and a lower steam chamber (12).

3. The high-content EPA / DHA product separation and purification device according to claim 2, characterized in that: The upper end of one side of the outer wall of the distillation cylinder (1) is provided with a feed pipe (2), and the feed pipe (2) is connected to the feed chamber (11). A high-temperature steam inlet pipe (3) is provided below the feed pipe (2), and the high-temperature steam inlet pipe (3) is connected to the steam chamber (12).

4. The high-content EPA / DHA product separation and purification device according to claim 1, characterized in that: The condensation mechanism (15) includes an upper water distribution plate (16) located below the film-forming mechanism. The lower end of the upper water distribution plate (16) is provided with a plurality of condenser tubes (17) arranged in a ring array. The condenser tubes (17) pass through the through hole (19), and the diameter of the through hole (19) is larger than that of the condenser tubes (17). The bottom of the distillation cylinder (1) is provided with a base (7). The interior of the base (7) is provided with a condensate chamber (22). The upper end of the condensate chamber (22) is fixedly installed with a lower water distribution plate (20), and the condenser tubes (17) are connected to the lower water distribution plate (20). The lower water distribution plate (20) is provided with circulation pipes (21) at both the front and rear. One of the circulation pipes (21) is equipped with a circulation pump.

5. The high-content EPA / DHA product separation and purification device according to claim 4, characterized in that: The rear end of the base (7) is provided with a medium refrigeration mechanism (8), which is equipped with an air compressor, a condenser and an expansion valve. An evaporator (23) is installed at the bottom of the condensate chamber (22), and the evaporator (23), the air compressor, the condenser and the expansion valve are connected by a medium circulation pipe (9).

6. The high-content EPA / DHA product separation and purification device according to claim 5, characterized in that: A temperature sensor for detecting the temperature of condensate is installed on the inner wall of the condensate chamber (22).

7. The high-content EPA / DHA product separation and purification device according to claim 1, characterized in that: The upper end of the light phase discharge pipe (5) is equipped with a vacuum tube (6) that connects to the distillation cylinder (1).

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