Fish oil distillation retort capable of increasing EPA and DHA contents

Abstract

The utility model discloses a fish oil distillation retort capable of increasing EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) contents, and relates to the technical field of fish oil purification. The barrel body is arranged in the tank body; the pump assembly is used for adding a catalyst in the catalyst box into the barrel; and the stirring assembly is used for stirring the fish oil, the buffer solution and the catalyst in the barrel so as to form a mixed solution. After a catalyst in the catalyst box is fed into the barrel body by the pump assembly, fish oil, a buffer solution and enzyme are stirred and mixed by the stirring assembly, so that the reaction is accelerated, the enzyme catalyst is added into the barrel body in batches, the reaction process is adjusted more accurately, waste is avoided, and the cost of the enzyme catalyst is saved; and after stirring and heating reaction for a period of time, centrifuging the obtained mixture, standing for a period of time for liquid separation, and distilling the upper oil phase to obtain the fish oil with higher EPA and DHA contents.

Description

Technical Field

[0001] The utility model relates to the technical field of fish oil purification, and specifically relates to a fish oil distillation tank for increasing the contents of EPA and DHA. Background Technique

[0002] Molecular distillation technology is mainly applied to the deep processing of fish oil and can effectively extract and separate polyunsaturated fatty acids in fish oil, such as EPA and DHA. The principle of this technology is as follows: First, heat the fish oil to evaporate the fatty acids in it. Then, the steam is cooled to condense different types of fatty acids, and these fatty acids can be processed through further separation and purification processes to obtain high-purity fish oil products. This technology requires the use of a molecular distillation tank. In order to further increase the contents of EPA and DHA, an enzyme catalyst is added during the distillation process. The steps are as follows: Add a certain amount of fish oil, buffer solution, and enzyme to a reaction vessel, fill it with an inert gas to protect the fish oil from oxidation, and heat and react for a period of time under stirring or shaking; after the reaction ends, centrifuge and separate the obtained mixture. The upper layer is the oil phase, which is a mixture of glycerides rich in EPA and DHA and free fatty acids, and the lower layer is the aqueous phase, which contains the enzyme or immobilized enzyme. By discharging the aqueous phase and taking the upper layer liquid, i.e., the oil phase, and performing molecular distillation on it, fish oil rich in more EPA and DHA can be obtained.

[0003] The existing technical problems: The traditional addition method is to pour the prepared enzyme catalyst into the distillation tank in a one-time sufficient amount in advance. The disadvantage of this input method is that it is not conducive to cost savings, mainly because it is impossible to accurately control the addition amount of the enzyme catalyst and precisely adjust the reaction process, resulting in too violent or too fast a reaction, which is not conducive to improving the selectivity and yield of the reaction and causing waste in the use of the enzyme catalyst. Therefore, it is very necessary to design a structure that can intermittently add the enzyme catalyst in batches. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fish oil distillation tank for increasing the contents of EPA and DHA, so as to solve the technical problem in the above background technique that the currently used distillation tank in the market adopts a one-time input method when adding the enzyme catalyst, resulting in waste of the enzyme catalyst.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A fish oil distillation tank for increasing the contents of EPA and DHA, comprising:

[0006] A tank body;

[0007] A cylinder body arranged in the tank body;

[0008] A catalyst box and a pump assembly for adding the catalyst in the catalyst box into the cylinder body;

[0009] A stirring assembly for stirring fish oil, buffer solution and catalyst in the cylinder to form a mixed solution;

[0010] A driving device for driving the cylinder to rotate to generate centrifugal force on the mixed solution.

[0011] As a preferred technical solution of the present utility model, the pump assembly includes: a piston cylinder respectively communicating with the catalyst tank and the cylinder, a piston is arranged in the piston cylinder, and the piston is connected with a driving assembly for driving it to reciprocate in the piston cylinder.

[0012] As a preferred technical solution of the present utility model, the stirring assembly includes a stirring rod, and the stirring rod is in transmission connection with the driving assembly.

[0013] As a preferred technical solution of the present utility model, the tank body is further provided with a steam discharge port, a fish oil feeding port, a buffer solution adding port, an inert gas inlet, and an inert gas discharge port.

[0014] As a preferred technical solution of the present utility model, a first aqueous phase discharge port is arranged at the bottom of the cylinder, an aqueous phase temporary storage area is formed between the bottom of the tank body and the bottom of the cylinder, and a second aqueous phase discharge port is arranged at the bottom of the tank body.

[0015] As a preferred technical solution of the present utility model, one end of the piston cylinder is connected with a first conduit, the other end of the first conduit is connected to the catalyst tank, one end of the piston cylinder is connected with a second conduit, the other end of the second conduit is connected to the cylinder in the tank body, and check valves are arranged in both the first conduit and the second conduit.

[0016] As a preferred technical solution of the present utility model, the driving assembly includes:

[0017] A rocker arm hinged to one end of the piston;

[0018] A crank disc hinged to the other end of the rocker arm;

[0019] A servo motor with an output shaft in transmission connection with the crank disc.

[0020] As a preferred technical solution of the present utility model, the driving assembly further includes:

[0021] A first pulley connected to the output shaft of the servo motor;

[0022] A gearbox and a second pulley arranged at the input end of the gearbox, and the output end of the gearbox is connected to the crank disc;

[0023] A belt connecting the first pulley and the second pulley.

[0024] As a preferred technical solution of the present utility model, one end of the stirring rod is connected with a rotating shaft, and one end of the rotating shaft penetrates through the top end of the tank body and is connected with the output shaft of the servo motor.

[0025] As a preferred technical solution of the present utility model, an observation window is provided at the upper end of the tank body, and a liquid level gauge is arranged at the lower end of the tank body. The liquid level gauge is used to display the liquid level height of the water phase temporary storage area.

[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0027] After the pump assembly of the present utility model sends the catalyst in the catalyst tank into the cylinder body, the stirring assembly stirs and mixes fish oil, buffer solution and enzyme, which is beneficial to accelerating the reaction. By adding the enzyme catalyst into the cylinder body in batches in this way, the reaction process can be adjusted more precisely, avoiding waste, helping to save the cost of the enzyme catalyst. After stirring and heating the reaction for a period of time, the obtained mixture is centrifuged, allowed to stand for a period of time for liquid separation, and the upper oil phase is taken for distillation, and fish oil with higher EPA and DHA contents can be obtained. Description of the Drawings

[0028] Figure 1 is a partial sectional three-dimensional structure diagram of the tank body and the cylinder body of the present utility model;

[0029] Figure 2 is a rear three-dimensional structure diagram of the present utility model;

[0030] Figure 3 is a partial sectional three-dimensional structure diagram of the piston cylinder of the present utility model.

[0031] In the figure: 1, tank body; 2, cylinder body; 3, driving device; 4, fish oil feeding port; 5, buffer solution adding port; 6, inert gas inlet; 7, inert gas discharge port; 8, steam discharge port; 9, first water phase discharge port; 10, second water phase discharge port; 11, servo motor; 12, rotating shaft; 13, stirring rod; 14, first belt pulley; 15, belt; 16, gearbox; 17, second belt pulley; 18, crank disk; 19, rocker; 20, piston; 21, piston cylinder; 22, piston chamber; 23, first conduit; 24, second conduit; 25, catalyst tank. Detailed Embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0033] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: a fish oil distillation tank for increasing the contents of EPA and DHA, comprising:

[0034] The tank body 1 is also provided with a steam discharge port 8 and a feeding structure for adding materials; specifically, the feeding structure includes: a fish oil feeding port 4, a buffer solution adding port 5, an inert gas inlet 6, and an inert gas discharge port 7 provided at the upper end of the tank body 1;

[0035] A cylinder body 2 provided in the tank body 1;

[0036] A catalyst box 25 and a pump assembly for adding the catalyst in the catalyst box 25 into the cylinder body 2;

[0037] A stirring assembly for stirring the fish oil, buffer solution and catalyst in the cylinder body 2 to form a mixed solution;

[0038] A driving device 3 for driving the cylinder body 2 to rotate to generate a centrifugal force on the mixed solution;

[0039] By adopting the above technical solution, the catalyst can be added in batches. During use, a certain amount of fish oil and buffer solution are respectively added into the cylinder body 2 through the fish oil feeding port 4 and the buffer solution adding port 5. Inert gas is filled into the tank body 1 through the inert gas inlet 6, and the air and excess inert gas inside the tank body 1 are discharged from the inert gas discharge port 7, so that the inside of the tank body 1 is in an anaerobic environment to protect the fish oil from being oxidized. The catalyst in the catalyst box 25 is sent into the cylinder body 2 through the pump assembly, and the stirring assembly stirs and mixes the fish oil, buffer solution and enzyme. Every time an enzyme catalyst is added, it will be stirred once. After stirring or shaking and heating for a period of time, the reaction ends. The driving device 3 is started to drive the cylinder body 2 to rotate at a high speed, and the obtained mixture is centrifuged and separated. After standing for a period of time, the upper layer is the oil phase, which is a mixture of glycerides rich in EPA and DHA and free fatty acids, and the lower layer is the water phase, which contains enzymes or immobilized enzymes. The lower water phase is discharged and the upper oil phase is retained. By distilling the oil phase, fish oil with a higher content of EPA and DHA can be obtained. Compared with adding a sufficient amount of enzyme catalyst at one time, the intermittent multiple-batch adding method can more precisely adjust the reaction process, avoid waste, and help save the cost of enzyme catalyst;

[0040] The specific parameter configuration is as follows: the volume-mass ratio of the buffer solution to the fish oil is 0.5:1–3:1; the addition amount of the enzyme is 0.1–0.5‰ of the mass of the fish oil; the buffer solution is 0.1 mol / L phosphate buffer solution, the pH value of the buffer solution is 5–9, preferably pH is 6; the enzyme is lipase or phospholipase and is stored in the catalyst box 25 in a dissolved state; the reaction temperature is 25–50 °C, preferably 35 °C; the reaction time is 8–24 h, preferably 10 h; the rotation speed of the stirring rod 13 is 200 r / min, and the inert gas is nitrogen.

[0041] Such as Figure 1As shown, in this embodiment, a first water phase discharge port 9 is provided at the bottom of the cylinder 2, a water phase temporary storage area is formed between the bottom of the tank body 1 and the bottom of the cylinder 2, and a second water phase discharge port 10 is provided at the bottom of the tank body 1; an observation window is provided at the upper end of the tank body 1, and a liquid level gauge is provided at the lower end of the tank body 1, and the liquid level gauge is used to display the liquid level height of the water phase temporary storage area;

[0042] The above technical solution can be used to conveniently release the water phase, so that only the oil phase is retained inside the cylinder 2. During operation, the first water phase discharge port 9 is opened to put the water phase into the space between the bottom of the tank body 1 and the bottom of the cylinder 2 to form a water phase temporary storage area, and then the second water phase discharge port 10 is opened to discharge the water phase from the tank body 1. The first water phase discharge port 9 and the second water phase discharge port 10 are both opened and closed by solenoid valves.

[0043] like Figure 1 and Figure 3 As shown, in this embodiment, the pump assembly includes: a piston cylinder 21 respectively connected to the catalyst box 25 and the cylinder body 2, a piston 20 is arranged in the piston cylinder 21, and the piston 20 is connected to a driving assembly for driving it to reciprocate in the piston cylinder 21; the stirring assembly includes a stirring rod 13, and the stirring rod 13 is transmission-connected to the driving assembly.

[0044] The above technical solution can achieve simultaneous catalyst addition and stirring. The driving component drives the piston 20 to reciprocate in the piston cylinder 21, so that the catalyst in the catalyst box 25 is drawn into the piston cylinder 21, and under the squeezing action of the piston 20, the catalyst is squeezed into the cylinder body 2. The piston 20 moves in the piston cavity 22 to create negative pressure and high pressure, similar to the effect of a pump. When the driving component is working, it will synchronously drive the stirring rod 13 to stir and mix the fish oil, buffer solution and enzyme. The fish oil, buffer solution and enzyme catalyst are fully mixed, thereby improving the reaction efficiency.

[0045] like Figure 2 and Figure 3 As shown, in this embodiment, one end of the piston cylinder 21 is connected to a first conduit 23, the other end of the first conduit 23 is connected to a catalyst box 25, one end of the piston cylinder 21 is connected to a second conduit 24, the other end of the second conduit 24 is connected to the cylinder 2 in the tank 1, and a one-way valve is provided in the first conduit 23 and the second conduit 24; the driving assembly includes: a rocker 19 with one end hingedly connected to the piston 20; a crank 18 hingedly connected to the other end of the rocker 19; a servo motor 11 with an output shaft drivingly connected to the crank 18;

[0046] Adopting the above technical solution can drive the piston 20 to reciprocate in the piston cylinder 21 by the servo motor 11. During use, the servo motor 11 drives the crank disk 18 to rotate, and the crank disk 18 drives the rocker 19 to rotate. Since the rocker 19 is arranged at the eccentric position of the crank disk 18, when the crank disk 18 rotates, it will drive the rocker 19 to swing, and the rocker 19 drives the piston 20 to reciprocate along the piston cavity 22 of the piston cylinder 21, thereby creating a pressure change in the piston cavity 22. Specifically, when the piston 20 moves away from the piston cavity 22, a negative pressure is formed inside the piston cavity 22, and the enzyme catalyst in the catalyst box 25 is pumped into the piston cavity 22 through the first conduit 23. When the piston 20 compresses the piston cavity 22, the enzyme catalyst is squeezed into the cylinder body 2 through the second conduit 24, thus realizing the automatic addition of the enzyme catalyst.

[0047] As Figure 1 shown, in this embodiment, the drive assembly further includes: a first pulley 14 connected to the output shaft of the servo motor 11; a gearbox 16 and a second pulley 17 provided at the input end of the gearbox 16, and the output end of the gearbox 16 is connected to the crank disk 18; a belt 15 connecting the first pulley 14 and the second pulley 17;

[0048] Adopting the above technical solution can ensure a differential speed between the crank disk 18 and the stirring rod 13. Since the rotational speed requirement of the stirring rod 13 is generally relatively high, while the rotational speed requirement of the crank disk 18 is relatively low, therefore, setting the gearbox 16 is beneficial to adjusting the rotational speeds of the two. During specific operation, the servo motor 11 drives the first pulley 14 to rotate, the first pulley 14 drives the second pulley 17 to rotate through the belt 15, the second pulley 17 drives the output end of the gearbox 16 to rotate, and the output end of the gearbox 16 drives the crank disk 18 to rotate. Through the speed change of the gearbox 16, the speeds between the stirring rod 13 and the crank disk 18 can be adjusted according to the required transmission ratio.

[0049] As Figure 1 shown, in this embodiment, one end of the stirring rod 13 is connected with a rotating shaft 12, and one end of the rotating shaft 12 penetrates through the top end of the tank body 1 and is connected to the output shaft of the servo motor 11;

[0050] Adopting the above technical solution can drive the stirring rod 13 to rotate. During operation, the output shaft of the servo motor 11 drives the rotating shaft 12 to rotate, and the rotating shaft 12 drives the stirring rod 13 connected thereto to rotate synchronously, thereby being able to stir the materials in the cylinder body 2.

[0051] Working principle: When in use, first add a certain amount of fish oil and buffer solution into the cylinder body 2 through the fish oil feeding port 4 and the buffer solution adding port 5 respectively. Fill the tank body 1 with inert gas through the inert gas inlet 6, and discharge the air and excess inert gas inside the tank body 1 from the inert gas outlet 7, so that the inside of the tank body 1 is in an anaerobic environment to protect the fish oil from oxidation. The servo motor 11 drives the crank disk 18 to rotate, and the crank disk 18 drives the rocker 19 to rotate. Since the rocker 19 is arranged at the eccentric position of the crank disk 18, when the crank disk 18 rotates, it will drive the rocker 19 to swing. The rocker 19 drives the piston 20 to reciprocate along the piston cavity 22 of the piston cylinder 21, thereby creating a pressure change in the piston cavity 22. Specifically, when the piston 20 moves away from the piston cavity 22, a negative pressure is formed inside the piston cavity 22, and the enzyme catalyst in the catalyst box 25 is sucked into the piston cavity 22 through the first conduit 23. When the piston 20 compresses the piston cavity 22, the enzyme catalyst is squeezed into the cylinder body 2 through the second conduit 24, thus realizing the automatic addition of the enzyme catalyst. When the servo motor 11 works, it will synchronously drive the stirring rod 13 to stir and mix the fish oil, buffer solution and enzyme. Each time the enzyme catalyst is added, it will be stirred once. Heat and react for a period of time under stirring or oscillation. After the reaction is completed, start the driving device 3 to drive the cylinder body 2 to rotate at a high speed, centrifuge and separate the obtained mixture, and let it stand for a period of time. The upper layer is the oil phase, which is a mixture of glycerides rich in EPA and DHA and free fatty acids, and the lower layer is the aqueous phase, which contains enzymes or immobilized enzymes. Discharge the lower aqueous phase and retain the upper oil phase. By distilling the oil phase, fish oil with higher EPA and DHA contents can be obtained. Usually, after the oil phase in the cylinder body 2 is distilled, there will be a layer of distillation residue remaining at the bottom of the cylinder body 2. These distillation residues can be recycled, that is, they are recovered and processed.

[0052] Thus, a series of operations are completed. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0053] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A fish oil distillation tank for increasing the contents of EPA and DHA, comprising: a tank body (1); characterized in that the fish oil distillation tank further comprises: a cylinder body (2) arranged in the tank body (1); a catalyst box (25) and a pump assembly for adding the catalyst in the catalyst box (25) into the cylinder body (2); a stirring assembly for stirring the fish oil, buffer solution and catalyst in the cylinder body (2) to form a mixed liquid; a driving device (3) for driving the cylinder body (2) to rotate to generate a centrifugal force on the mixed liquid.

2. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 1, wherein The pump assembly comprises: a piston cylinder (21) communicated with both the catalyst box (25) and the cylinder body (2), a piston (20) is arranged in the piston cylinder (21), and the piston (20) is connected with a driving assembly for driving it to reciprocate in the piston cylinder (21).

3. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 2, characterized in that, The stirring assembly comprises a stirring rod (13), and the stirring rod (13) is in transmission connection with the driving assembly.

4. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 3, wherein The tank body (1) is further provided with a steam discharge port (8), a fish oil feeding port (4), a buffer solution adding port (5), an inert gas inlet (6), and an inert gas discharge port (7).

5. The fish oil distillation tank for increasing EPA and DHA contents according to claim 4, characterized in that, A first aqueous phase discharge port (9) is arranged at the bottom of the cylinder body (2), an aqueous phase temporary storage area is formed between the bottom of the tank body (1) and the bottom of the cylinder body (2), and a second aqueous phase discharge port (10) is arranged at the bottom of the tank body (1).

6. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 3, wherein, One end of the piston cylinder (21) is connected with a first conduit (23), the other end of the first conduit (23) is connected to the catalyst box (25), one end of the piston cylinder (21) is connected with a second conduit (24), the other end of the second conduit (24) is connected to the cylinder body (2) in the tank body (1), and one-way valves are arranged in both the first conduit (23) and the second conduit (24).

7. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 6, wherein The driving assembly comprises: a rocker (19) hinged to one end of the piston (20); a crank disk (18) hinged to the other end of the rocker (19); a servo motor (11) whose output shaft is in transmission connection with the crank disk (18).

8. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 7, characterized in that, The driving assembly further comprises: a first belt pulley (14) connected to the output shaft of the servo motor (11); a gearbox (16) and a second belt pulley (17) arranged at the input end of the gearbox (16), and the output end of the gearbox (16) is connected to the crank disk (18); a belt (15) connecting the first belt pulley (14) and the second belt pulley (17).

9. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 7 or 8, characterized in that, One end of the stirring rod (13) is connected with a rotating shaft (12), and one end of the rotating shaft (12) penetrates through the top end of the tank body (1) and is connected to the output shaft of the servo motor (11).

10. The fish oil distillation tank for increasing the EPA and DHA contents according to claim 4, characterized in that, An observation window is opened at the upper end of the tank body (1), and a liquid level gauge is arranged at the lower end of the tank body (1), and the liquid level gauge is used to display the liquid level height of the aqueous phase temporary storage area.

Images