A non-stick, high-efficiency decolorizing kettle for fish oil refining

Abstract

This application relates to the field of fish oil refining and extraction equipment, and in particular to a high-efficiency, non-sticking decolorizing kettle for fish oil refining. The kettle includes a decolorizing kettle body, within which a stirring wheel is installed. The stirring wheel rotates within the kettle body and moves up and down vertically during rotation. Multiple sets of wall-scraping components are installed within the kettle body. Each wall-scraping component includes a first scraper and a second scraper. The end of the first scraper abuts against the inner wall of the kettle body and slides vertically. The second scraper is positioned between the first scraper and the inner wall of the kettle body, with its end also abutting against the inner wall. During its vertical sliding motion, the second scraper reciprocates vertically. The purpose of this application is to solve the problems of uneven mixing and low efficiency caused by fish oil adhering to the inner wall of the decolorizing kettle during the fish oil decolorization process, thereby improving the quality of the fish oil.

Description

Technical Field

[0001] This application relates to the field of fish oil refining and extraction equipment, and in particular to a high-efficiency decolorizing kettle for fish oil refining that prevents sticking to the wall. Background Technology

[0002] Fish oil decolorization is a crucial step in the fish oil refining process. Its main purposes are: to improve color by adsorbing and removing pigments (such as carotenoids and chlorophyll degradation products) from the fish oil, making it clear, light yellow, or colorless; to improve quality by adsorbing and removing some residual proteins, colloids, mucus, oxidation products, soap particles, and other impurities; and to improve stability, as some decolorizing agents (such as activated carbon) can also adsorb trace metal ions, delaying subsequent oxidation of the fish oil and extending its shelf life.

[0003] The decolorizing reactor is the core reaction equipment for realizing this process, ensuring that fish oil and decolorizing agent (usually decolorizing clay or activated carbon, or a mixture of both) come into full contact and complete the adsorption reaction under specific temperature and vacuum conditions.

[0004] In related technologies, when fish oil is heated, stirred, or mixed with decolorizing agents (such as activated clay or activated carbon) in a decolorizing reactor, it tends to adhere to the inner wall of the reactor. This not only wastes raw materials but also leads to reduced heat transfer efficiency, uneven mixing, and even excessive oxidation or coking of the fish oil adhering to the wall, seriously affecting product quality. Summary of the Invention

[0005] This application provides a high-efficiency decolorizing kettle with anti-sticking wall for fish oil refining. The purpose is to scrape off the fish oil adhering to the inner wall of the decolorizing kettle in a timely and effective manner, thereby effectively preventing the fish oil from adhering to the inner wall of the decolorizing kettle for a long time. This helps to solve the problems of uneven mixing and low efficiency of fish oil caused by adhering to the inner wall of the decolorizing kettle during the fish oil decolorization process, thereby improving the quality of fish oil.

[0006] This application provides a high-efficiency, non-sticking decolorizing kettle for fish oil refining, employing the following technical solution: A high-efficiency decolorizing kettle for refining fish oil with anti-sticking wall includes a decolorizing kettle body. The decolorizing kettle body is equipped with a stirring wheel, which is rotatably disposed in the decolorizing kettle body. The stirring wheel moves up and down in the vertical direction during rotation. The decolorizing kettle body is equipped with multiple sets of wall scraping components. The wall scraping assembly includes a first scraper and a second scraper. The end of the first scraper abuts against the inner wall of the decolorizing kettle body. The first scraper slides vertically. The second scraper is located between the first scraper and the inner wall of the decolorizing kettle body. The end of the second scraper abuts against the inner wall of the decolorizing kettle body. During the sliding motion of the first scraper, the second scraper is simultaneously driven to slide vertically. During the sliding motion of the second scraper in the vertical direction, the second scraper reciprocates up and down in the vertical direction.

[0007] By adopting the above technical solution, the first scraper and the second scraper are used to scrape off the fish oil adhering to the inner wall of the decolorizing kettle body. Since the second scraper moves up and down, it can further improve the effect of scraping off the fish oil and ensure that the fish oil is scraped off from the inner wall of the decolorizing kettle body.

[0008] Compared to the traditional method of scraping fish oil using only a single conventional scraper, this design utilizes both a first and a second scraper to simultaneously scrape the fish oil off the inner wall of the decolorizing vessel. The reciprocating motion of the second scraper increases the number of scraping passes. After the first scraper removes the fish oil from the inner wall, the second scraper's reciprocating motion further scrapes the inner wall, significantly improving the removal efficiency. This effectively prevents fish oil from adhering to the inner wall for extended periods, thus addressing issues such as uneven mixing and low efficiency caused by fish oil adhering to the inner wall during the decolorization process, ultimately improving fish oil quality.

[0009] Preferably, a drive motor is provided at the top of the decolorizing kettle body, and a first rotating shaft is provided vertically at the drive end of the drive motor. A second rotating shaft is connected to the end of the first rotating shaft away from the drive motor. One end of the second rotating shaft is connected to the first rotating shaft by a telescopic spring. The other end of the second rotating shaft passes through the decolorizing kettle body and extends into the decolorizing kettle body, and is connected to the stirring wheel. The second rotating shaft is a screw. An internal threaded hole is provided at the top of the decolorizing kettle body, and the second rotating shaft passes through the internal threaded hole.

[0010] By adopting the above technical solution, when the stirring wheel mixes the fish oil and decolorizing agent, a drive motor drives the first rotating shaft to rotate. During the rotation of the first rotating shaft, a telescopic spring synchronously drives the second rotating shaft to rotate within the internal threaded hole, which in turn synchronously drives the stirring wheel to rotate. Simultaneously, as the second rotating shaft rotates within the internal threaded hole, it also rises and falls vertically, thus synchronously driving the stirring wheel to rise and fall while rotating. This improves the stirring wheel's mixing effect on the fish oil and decolorizing agent.

[0011] The telescopic spring connects the first and second rotating shafts and also assists in the rotation and lifting of the second rotating shaft, thus helping to ensure the stability of the rotation and lifting of the second rotating shaft.

[0012] Preferably, the impellers of the stirring wheel are integrally formed on the periphery of the stirring wheel at different heights.

[0013] By adopting the above technical solution, the multiple impellers of the stirring wheel are distributed at different heights, which can further increase the overall stirring range of the stirring wheel, thereby improving the stirring wheel's effect on mixing fish oil and decolorizing agent.

[0014] Preferably, a driving bevel gear is integrally fitted around the periphery of the first rotating shaft in the horizontal direction. A driven bevel gear is meshed with the bottom of the driving bevel gear. The end of the driven bevel gear away from the driving bevel gear is connected to the driven gear through the rotating shaft. A driven rack is installed in the body of the decolorizing kettle in the vertical direction. One end of the driven rack extends upward through the body of the decolorizing kettle and meshes with the driven gear. The other end of the driven rack is integrally connected to the outer wall of the first scraper.

[0015] By adopting the above technical solution, specifically, while the first rotating shaft drives the active bevel gear to rotate, it simultaneously drives the driven bevel gear and the driven gear to rotate. As the driven gear rotates, the driven gear and the driven rack mesh, and then the driven gear drives the driven rack to slide in the vertical direction. During the sliding of the driven rack, the first scraper is simultaneously driven to slide in the vertical direction within the decolorization kettle body.

[0016] Preferably, a drive cam is provided inside the first scraper, and the drive cam is connected to the second scraper. While the first scraper slides in the vertical direction, it drives the drive cam to rotate. During the rotation, the drive cam drives the second scraper to move up and down in the vertical direction.

[0017] By adopting the above technical solution, the second scraper is driven by the drive cam to move up and down in the vertical direction. The second scraper is used to further scrape off the fish oil adhering to the inner wall of the decolorizing kettle. Since the second scraper moves up and down, it can further improve the effect of scraping off the fish oil and ensure that the fish oil is scraped off from the inner wall of the decolorizing kettle.

[0018] Preferably, a rotating shaft is inserted horizontally along the inner edge of the first scraper. Both ends of the rotating shaft extend outside the first scraper. A driving gear is integrally connected to the end of the rotating shaft. And a fixed rack is arranged vertically along the inner wall of the decolorization kettle body. The driving gear is meshed with the fixed rack. A transfer rod is additionally arranged horizontally along the inner edge of the first scraper. One end of the transfer rod is integrally connected to the second scraper. The other end of the transfer rod is connected to a driving cam in a butt-joint manner. The driving cam is integrally sleeved on the circumference of the rotating shaft.

[0019] By adopting the above technical solution, specifically, as the first scraper slides vertically along the inner wall of the decolorization kettle body, during the sliding process, it synchronously drives the rotating shaft to slide vertically. During the sliding process of the rotating shaft, it synchronously drives the driving gear to slide. In this process, the driving gear continuously meshes with the fixed rack. During the meshing process of the driving gear and the fixed rack, the driving gear rotates. At this time, the rotating shaft is synchronously driven to rotate by the driving gear. Furthermore, the rotating shaft is synchronously driven to rotate by the rotating shaft. As the rotating shaft starts to rotate, the driving cam is driven to rotate by the rotating shaft. During the rotation process of the driving cam, the transfer rod is driven to reciprocate vertically up and down. Then, the second scraper is synchronously driven to reciprocate vertically up and down by the transfer rod.

[0020] Preferably, an auxiliary roller is installed at one end of the transfer rod close to the driving cam. The auxiliary roller is connected to the driving cam in a butt-joint manner.

[0021] By adopting the above technical solution, the connection between the driving cam and the transfer rod is transitioned by the auxiliary roller. Thus, the driving cam is more smooth during the process of driving the transfer rod to reciprocate vertically up and down, which is beneficial to improving the stability of the transfer rod and the second scraper sliding vertically.

[0022] Preferably, an auxiliary spring is connected vertically between the top of the second scraper and the inner wall of the first scraper.

[0023] By adopting the above technical solution, when the driving cam abuts against the auxiliary roller, in this state, the driving cam jacks up the transfer rod and the second scraper through the auxiliary roller. At this time, the auxiliary spring is in a compressed state. When the driving cam and the auxiliary roller are separated, in this state, the auxiliary spring restores its deformation and pushes the second scraper downward. Thus, the auxiliary spring assists the reciprocating movement of the second scraper up and down, which is beneficial to improving the stability of the second scraper during the reciprocating movement vertically.

[0024] Preferably, the second scraper as a whole has a "U" - shaped structure, and one end of the second scraper abutting against the inner wall of the decolorization kettle body is in a pointed shape.

[0025] By adopting the above technical solution, the end of the second scraper that abuts against the decolorizing tank body is set as a pointed tip. This makes the contact between the second scraper and the decolorizing tank body a line contact, whereas the traditional scraper and decolorizing tank body often have a surface contact. Setting the contact between the second scraper and the decolorizing tank body as a line contact effectively reduces the contact area between them. This prevents the scraped fish oil from re-adhering to the second scraper during the scraping process, thus reducing raw material waste and ensuring that more fish oil is remixed with the decolorizing agent for decolorization.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Use the first scraper and the second scraper to scrape off the fish oil adhering to the inner wall of the decolorizing kettle body. Since the second scraper moves up and down, it can further improve the effect of scraping off the fish oil, ensuring that the fish oil is scraped off from the inner wall of the decolorizing kettle body.

[0027] Compared to the traditional method of scraping fish oil using only a single conventional scraper, this design utilizes both a first and a second scraper to simultaneously scrape the fish oil off the inner wall of the decolorizing vessel. The reciprocating motion of the second scraper increases the number of scraping passes. After the first scraper removes the fish oil from the inner wall, the second scraper's reciprocating motion further scrapes the inner wall, significantly improving the removal efficiency. This effectively prevents fish oil from adhering to the inner wall for extended periods, thus addressing issues such as uneven mixing and low efficiency caused by fish oil adhering to the inner wall during the decolorization process, ultimately improving the quality of the fish oil. 2. As the first scraper slides vertically within the decolorizing kettle, it simultaneously drives the rotating shaft to slide vertically as well. During this sliding process, the rotating shaft drives the drive gear to slide as well. The drive gear continuously meshes with the fixed rack, causing it to rotate. This rotation, in turn, drives the rotating shaft to rotate, which in turn drives the drive cam to rotate. The drive cam, in turn, drives the adapter rod to reciprocate vertically, which in turn drives the second scraper to reciprocate vertically. 3. By designing the end of the second scraper that abuts against the decolorizing tank body as a pointed tip, the contact between the second scraper and the decolorizing tank body becomes a line contact, whereas traditional scrapers and decolorizing tank bodies often have surface contact. Making the contact between the second scraper and the decolorizing tank body a line contact effectively reduces the contact area between them. This prevents the scraped fish oil from re-adhering to the second scraper during the scraping process, thus reducing raw material waste and ensuring that more fish oil is remixed with the decolorizing agent for decolorization. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram illustrating the positional relationship of the stirring wheel, the first scraper, the second scraper, the first rotating shaft, the driving bevel gear, the driven gear, and the drive gear in the embodiments of this application. Figure 3 This is a schematic diagram illustrating the positional relationship of the drive cam, rotating shaft, fixed rack, adapter rod, auxiliary roller, and auxiliary spring in specific embodiments of this application. Figure 4 This is a structural schematic diagram illustrating the shape of the second scraper in a specific embodiment of this application.

[0029] Reference numerals in the attached drawings: 1. Decolorizing kettle body; 2. Stirring wheel; 3. First scraper; 4. Second scraper; 5. Drive motor; 6. First rotating shaft; 7. Second rotating shaft; 8. Telescopic spring; 9. Internal threaded hole; 10. Driving bevel gear; 11. Driven bevel gear; 12. Driven gear; 13. Driven rack; 14. Drive cam; 15. Rotating shaft; 16. Drive gear; 17. Fixed rack; 18. Adapter rod; 19. Auxiliary roller; 20. Auxiliary spring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.

[0031] Example: This application discloses an anti-sticking, high-efficiency decolorizing reactor for fish oil refining, with reference to... Figure 1 and Figure 2 The system includes a decolorizing kettle body 1, which is rectangular in shape. A pipe is installed on the top of the decolorizing kettle body 1 for evacuating the inside of the decolorizing kettle body 1 and for venting waste gas, so as to ensure that the fish oil is in a vacuum state during the decolorization process and that the waste gas inside the decolorizing kettle body 1 can be discharged in time after the decolorization is completed.

[0032] Reference Figure 1 and Figure 2The decolorizing kettle body 1 is equipped with a stirring wheel 2. After fish oil and the corresponding decolorizing agent are added to the decolorizing kettle body 1, they are stirred by the stirring wheel 2, which allows the fish oil and the decolorizing agent to be fully mixed, thereby improving the decolorization effect of the fish oil. At the same time, the stirring wheel 2 moves up and down vertically during the stirring process inside the decolorizing kettle body 1. This allows the stirring wheel 2 to stir the fish oil and the decolorizing agent at different depths, which in turn helps to improve the decolorization effect of the fish oil.

[0033] Meanwhile, the decolorizing kettle body 1 is equipped with multiple sets of wall scraping components. These wall scraping components correspond to multiple inner walls of the decolorizing kettle body 1. The wall scraping components are used to scrape off the fish oil adhering to the inner wall of the decolorizing kettle. The wall scraping components effectively prevent fish oil from adhering to the inner wall of the decolorizing kettle for a long time, which helps to solve the problems of uneven mixing and low efficiency of fish oil caused by adhering to the inner wall of the decolorizing kettle during the fish oil decolorization process, thereby improving the quality of fish oil.

[0034] Specifically, refer to Figure 1 and Figure 2 The wall scraping assembly includes a first scraper 3 and a second scraper 4. The first scraper 3 has an overall "U"-shaped structure, with its end abutting against the inner wall of the decolorizing kettle body 1. The first scraper 3 slides vertically and scrapes off the fish oil adhering to the inner wall during its up-and-down sliding motion. The second scraper 4 is located between the first scraper 3 and the inner wall of the decolorizing kettle body 1. The end of the second scraper 4 also abuts against the inner wall of the decolorizing kettle body 1. The second scraper 4 slides vertically and reciprocates vertically.

[0035] As the first scraper 3 slides up and down, it simultaneously drives the second scraper 4 to slide vertically. During this vertical sliding motion, the second scraper 4 reciprocates up and down in the vertical direction. The second scraper 4 further scrapes away the fish oil adhering to the inner wall of the decolorizing kettle body 1. Because the second scraper 4 reciprocates up and down, it can further improve the effect of scraping away the fish oil, ensuring that the fish oil is scraped off from the inner wall of the decolorizing kettle body 1.

[0036] Compared to the traditional method of scraping fish oil using only a single conventional scraper, this design utilizes both the first scraper 3 and the second scraper 4 to simultaneously scrape the fish oil off the inner wall of the decolorizing kettle body 1. The reciprocating motion of the second scraper 4 increases the number of scraping passes. After the first scraper 3 removes the fish oil from the inner wall of the decolorizing kettle body 1, the reciprocating motion of the second scraper 4 performs repeated secondary scraping, significantly improving the removal efficiency. This effectively prevents fish oil from adhering to the inner wall of the decolorizing kettle for extended periods, thus addressing issues such as uneven mixing and low efficiency caused by fish oil adhering to the inner wall during the decolorization process, ultimately improving the quality of the fish oil.

[0037] Specifically, refer to Figure 1 and Figure 2 A drive motor 5 is fastened to the top of the decolorizing kettle body 1 by fastening bolts. The drive end of the drive motor 5 faces vertically downwards, and a first rotating shaft 6 is installed vertically at its drive end. A second rotating shaft 7 is connected to the end of the first rotating shaft 6 away from the drive motor 5. One end of the second rotating shaft 7 is connected to the first rotating shaft 6 by a telescopic spring 8. The other end of the second rotating shaft 7 penetrates the decolorizing kettle body 1 and extends into the decolorizing kettle body 1, and is connected to the stirring wheel 2. The second rotating shaft 7 is a screw, and an internal threaded hole 9 is opened through the top of the decolorizing kettle body 1, through which the second rotating shaft 7 passes.

[0038] When the stirring wheel 2 mixes the fish oil and decolorizing agent, the first rotating shaft 6 is driven to rotate by the drive motor 5. During the rotation of the first rotating shaft 6, the second rotating shaft 7 is simultaneously driven to rotate within the internal threaded hole 9 via the telescopic spring 8. This, in turn, drives the stirring wheel 2 to rotate. Simultaneously, as the second rotating shaft 7 rotates within the internal threaded hole 9, it also moves up and down vertically. This movement of the second rotating shaft 7 simultaneously drives the stirring wheel 2 to move up and down while rotating, thereby improving the mixing effect of the stirring wheel 2 on the fish oil and decolorizing agent.

[0039] The telescopic spring 8 connects the first rotating shaft 6 and the second rotating shaft 7, and also assists in the rotation and lifting of the second rotating shaft 7, thereby helping to ensure the stability of the rotation and lifting of the second rotating shaft 7.

[0040] Furthermore, the stirring wheel 2 has three impellers, which are integrally formed on the periphery of the stirring wheel 2 at three different heights: upper, middle, and lower. Distributing the multiple impellers of the stirring wheel 2 at different heights can further increase the overall stirring range of the stirring wheel 2, thereby improving the stirring wheel 2's effect on mixing fish oil and decolorizing agent.

[0041] Specifically, refer to Figure 1 and Figure 2 A driving bevel gear 10 is integrally fitted around the periphery of the first rotating shaft 6 in the horizontal direction. As the first rotating shaft 6 rotates, it drives the driving bevel gear 10 to rotate horizontally. A driven bevel gear 11 is meshed with the bottom of the driving bevel gear 10. The end of the driven bevel gear 11 furthest from the driving bevel gear 10 is connected to a driven gear 12 via a corresponding rotating shaft. The driven bevel gear 11 synchronously drives the driven gear 12 to rotate via the rotating shaft. A driven rack 13 is installed vertically inside the decolorizing kettle body 1. One end of the driven rack 13 extends upward through the decolorizing kettle body 1 and meshes with the driven gear 12. The other end of the driven rack 13 is integrally connected to the outer wall of the first scraper 3.

[0042] Specifically, while the first rotating shaft 6 drives the active bevel gear 10 to rotate, it simultaneously drives the driven bevel gear 11 and the driven gear 12 to rotate. As the driven gear 12 rotates, the driven gear 12 and the driven rack 13 mesh, and then the driven gear 12 drives the driven rack 13 to slide in the vertical direction. During the sliding process of the driven rack 13, the first scraper 3 is simultaneously driven to slide in the vertical direction within the decolorizing kettle body 1.

[0043] A sealing ring is provided between the driven rack 13 and the decolorizing kettle body 1, which effectively ensures the sealing between the driven rack 13 and the decolorizing kettle body 1.

[0044] Specifically, refer to Figure 1 , Figure 2 as well as Figure 3 A drive cam 14 is provided inside the first scraper 3. The drive cam 14 is connected to the second scraper 4. While the first scraper 3 slides in the vertical direction, it drives the drive cam 14 to rotate. During the rotation, the drive cam 14 drives the second scraper 4 to move up and down in the vertical direction.

[0045] The second scraper 4 is driven by the drive cam 14 to move up and down in the vertical direction. The second scraper 4 is used to further scrape off the fish oil adhering to the inner wall of the decolorizing kettle body 1. Since the second scraper 4 moves up and down, it can further improve the effect of scraping off the fish oil, ensuring that the fish oil is scraped off from the inner wall of the decolorizing kettle body 1.

[0046] Specifically, refer to Figure 1 , Figure 2 as well as Figure 3A rotating shaft 15 is horizontally inserted inside the first scraper 3, with both ends of the rotating shaft 15 extending beyond the outer side of the first scraper 3. A drive gear 16 is integrally connected to one end of the rotating shaft 15 extending beyond the first scraper 3, and a fixed rack 17 is vertically fitted inside the decolorizing kettle body 1. The drive gear 16 and the fixed rack 17 are meshed together. A connecting rod 18 is horizontally added inside the first scraper 3, with one end of the connecting rod 18 integrally connected to the second scraper 4, and the other end of the connecting rod 18 connected to a drive cam 14. The drive cam 14 is integrally fitted around the rotating shaft 15.

[0047] Specifically, as the first scraper 3 slides vertically within the decolorizing kettle body 1, it simultaneously drives the rotating shaft 15 to slide vertically as well. During this sliding process, the rotating shaft 15 simultaneously drives the drive gear 16 to slide as well. During this process, the drive gear 16 continuously meshes with the fixed rack 17. As the drive gear 16 meshes with the fixed rack 17, it rotates, simultaneously driving the rotating shaft 15 to rotate. This, in turn, drives the rotating shaft 15 to rotate. As the rotating shaft 15 begins to rotate, it drives the drive cam 14 to rotate. During this rotation, the drive cam 14 drives the adapter rod 18 to reciprocate vertically, which in turn drives the second scraper 4 to reciprocate vertically.

[0048] Furthermore, referring to Figure 1 , Figure 2 as well as Figure 3 An auxiliary roller 19 is installed at one end of the adapter rod 18 near the drive cam 14, and the bottom of the auxiliary roller 19 is connected to the top of the drive cam 14.

[0049] The auxiliary roller 19 is used to transition the connection between the drive cam 14 and the adapter rod 18, so that the drive cam 14 can move more smoothly in the process of driving the adapter rod 18 to move up and down in the vertical direction, which is conducive to improving the stability of the adapter rod 18 and the second scraper 4 in the vertical direction.

[0050] Furthermore, referring to Figure 1 , Figure 2 as well as Figure 3An auxiliary spring 20 is vertically connected between the top of the second scraper 4 and the inner wall of the first scraper 3. When the drive cam 14 and the auxiliary roller 19 abut, the drive cam 14 pushes the adapter rod 18 and the second scraper 4 upward through the auxiliary roller 19, at which time the auxiliary spring 20 is in a compressed state. When the drive cam 14 and the auxiliary roller 19 disengage, the auxiliary spring 20 returns to its original deformation, pushing the second scraper 4 downward. Thus, the auxiliary spring 20 assists the up-and-down reciprocating motion of the second scraper 4, which helps to improve the stability of the second scraper 4 during its vertical up-and-down reciprocating motion.

[0051] Furthermore, referring to Figure 1 , Figure 2 as well as Figure 4 The second scraper 4 has an overall "U"-shaped structure, with one end of the second scraper 4 abutting against the inner wall of the decolorizing kettle body 1 being pointed. By making the end of the second scraper 4 that abuts against the decolorizing kettle body 1 a pointed shape, the contact between the second scraper 4 and the decolorizing kettle body 1 becomes a line contact, whereas traditional scrapers and decolorizing kettle bodies 1 often have surface contact. Making the contact between the second scraper 4 and the decolorizing kettle body 1 a line contact effectively reduces the contact area between them. This prevents the scraped fish oil from re-adhering to the second scraper 4 during the scraping process, thus reducing raw material waste and ensuring that more fish oil is re-mixed with the decolorizing agent for decolorization.

[0052] The implementation principle of the anti-sticking high-efficiency decolorizing kettle for fish oil refining in this application embodiment is as follows: The decolorizing kettle body 1 is equipped with a stirring wheel 2. After fish oil and the corresponding decolorizing agent are added to the decolorizing kettle body 1, they are stirred by the stirring wheel 2, which allows the fish oil and the decolorizing agent to be fully mixed, thereby improving the decolorization effect of the fish oil. At the same time, the stirring wheel 2 moves up and down vertically during the stirring process inside the decolorizing kettle body 1. This allows the stirring wheel 2 to stir the fish oil and the decolorizing agent at different depths, which in turn helps to improve the decolorization effect of the fish oil.

[0053] Meanwhile, the decolorizing kettle body 1 is equipped with multiple sets of wall scraping components. These wall scraping components correspond to multiple inner walls of the decolorizing kettle body 1. The wall scraping components are used to scrape off the fish oil adhering to the inner wall of the decolorizing kettle. The wall scraping components effectively prevent fish oil from adhering to the inner wall of the decolorizing kettle for a long time, which helps to solve the problems of uneven mixing and low efficiency of fish oil caused by adhering to the inner wall of the decolorizing kettle during the fish oil decolorization process, thereby improving the quality of fish oil.

[0054] Specifically, the wall scraping assembly includes a first scraper 3 and a second scraper 4. The first scraper 3 has an overall "U"-shaped structure, with its end abutting against the inner wall of the decolorizing kettle body 1. The first scraper 3 slides vertically and scrapes off the fish oil adhering to the inner wall during its up-and-down sliding motion. The second scraper 4 is located between the first scraper 3 and the inner wall of the decolorizing kettle body 1. The end of the second scraper 4 also abuts against the inner wall of the decolorizing kettle body 1. The second scraper 4 slides vertically and reciprocates vertically.

[0055] As the first scraper 3 slides up and down, it simultaneously drives the second scraper 4 to slide vertically. During this vertical sliding motion, the second scraper 4 reciprocates up and down in the vertical direction. The second scraper 4 further scrapes away the fish oil adhering to the inner wall of the decolorizing kettle body 1. Because the second scraper 4 reciprocates up and down, it can further improve the effect of scraping away the fish oil, ensuring that the fish oil is scraped off from the inner wall of the decolorizing kettle body 1.

[0056] Compared to the traditional method of scraping fish oil using only a single conventional scraper, this design utilizes both the first scraper 3 and the second scraper 4 to simultaneously scrape the fish oil off the inner wall of the decolorizing kettle body 1. The reciprocating motion of the second scraper 4 increases the number of scraping passes. After the first scraper 3 removes the fish oil from the inner wall of the decolorizing kettle body 1, the reciprocating motion of the second scraper 4 performs repeated secondary scraping, significantly improving the removal efficiency. This effectively prevents fish oil from adhering to the inner wall of the decolorizing kettle for extended periods, thus addressing issues such as uneven mixing and low efficiency caused by fish oil adhering to the inner wall during the decolorization process, ultimately improving the quality of the fish oil.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency decolorizing kettle for refining fish oil with anti-sticking walls, characterized in that: The decolorizing kettle body (1) includes a stirring wheel (2) inside the decolorizing kettle body (1). The stirring wheel (2) is rotatably disposed inside the decolorizing kettle body (1), and the stirring wheel (2) moves up and down in the vertical direction during rotation. The decolorizing kettle body (1) is provided with multiple sets of wall scraping components. The scraping assembly includes a first scraper (3) and a second scraper (4). The end of the first scraper (3) abuts against the inner wall of the decolorizing kettle body (1). The first scraper (3) slides vertically. The second scraper (4) is located between the first scraper (3) and the inner wall of the decolorizing kettle body (1). The end of the second scraper (4) abuts against the inner wall of the decolorizing kettle body (1). During the upward and downward sliding of the first scraper (3), the second scraper (4) is simultaneously driven to slide vertically. During the vertical sliding of the second scraper (4), the second scraper (4) reciprocates up and down in the vertical direction.

2. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 1, characterized in that: The top of the decolorizing kettle body (1) is provided with a drive motor (5). The drive end of the drive motor (5) is provided with a first rotating shaft (6) in the vertical direction. The end of the first rotating shaft (6) away from the drive motor (5) is connected to a second rotating shaft (7). One end of the second rotating shaft (7) is connected to the first rotating shaft (6) by a telescopic spring (8). The other end of the second rotating shaft (7) passes through the decolorizing kettle body (1) and extends into the decolorizing kettle body (1), and is connected to the stirring wheel (2). The second rotating shaft (7) is a screw. The top of the decolorizing kettle body (1) is provided with an internal threaded hole (9), and the second rotating shaft (7) passes through the internal threaded hole (9).

3. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 2, characterized in that: The impellers of the stirring wheel (2) are integrally formed on the periphery of the stirring wheel (2) at different heights.

4. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 3, characterized in that: A drive bevel gear (10) is integrally fitted around the circumference of the first rotating shaft (6) in the horizontal direction. A driven bevel gear (11) is meshed with the bottom of the drive bevel gear (10). A driven gear (12) is connected to the end of the driven bevel gear (11) away from the drive bevel gear (10) through the rotating shaft. A driven rack (13) is installed in the body (1) of the decolorizing kettle in the vertical direction. One end of the driven rack (13) extends upward through the body (1) of the decolorizing kettle and meshes with the driven gear (12). The other end of the driven rack (13) is integrally connected to the outer wall of the first scraper (3).

5. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 4, characterized in that: A drive cam (14) is provided inside the first scraper (3). The drive cam (14) and the second scraper (4) are connected. When the first scraper (3) slides in the vertical direction, it drives the drive cam (14) to rotate. During the rotation, the drive cam (14) drives the second scraper (4) to move up and down in the vertical direction.

6. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 5, characterized in that: A rotating shaft (15) is inserted horizontally inside the first scraper (3). Both ends of the rotating shaft (15) extend outside the first scraper (3). A driving gear (16) is integrally connected to the end of the rotating shaft (15). A fixed rack (17) is provided vertically inside the decolorization kettle body (1). The driving gear (16) and the fixed rack (17) are meshed and connected. A transfer rod (18) is additionally provided horizontally inside the first scraper (3). One end of the transfer rod (18) is integrally connected to the second scraper (4). The other end of the transfer rod (18) is connected to the driving cam (14). The driving cam (14) is integrally sleeved on the periphery of the rotating shaft (15).

7. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 6, characterized in that: An auxiliary roller (19) is installed at one end of the transfer rod (18) close to the driving cam (14). The auxiliary roller (19) is connected to the driving cam (14).

8. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 7, characterized in that: An auxiliary spring (20) is vertically connected between the top of the second scraper (4) and the inner wall of the first scraper (3).

9. The anti-sticking, high-efficiency decolorizing kettle for fish oil refining according to claim 1, characterized in that: The second scraper (4) has an overall "U" - shaped structure, and the end of the second scraper (4) abutting against the inner wall of the decolorization kettle body (1) is pointed.

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