A device for biologically enzymatically decolorizing refined lard

Abstract

The present application relates to the technical field of animal oil refining processing, and particularly relates to a device for decoloring refined lard by a biological enzyme method, which comprises a support frame, a heat preservation tank is arranged on the support frame, a reaction kettle is arranged in the heat preservation tank in a nested mode, and a stirring assembly is prearranged in the reaction kettle; a switching mechanism is assembled on the support frame and is connected with four groups of conveying elements; a pumping mechanism is installed on the support frame and is communicated with the air inlet end of the switching mechanism; and a control mechanism is arranged on the support frame and is in transmission connection with the switching mechanism. In the process of decoloring lard, inert gas is alternately filled from different directions at the bottom of the reaction kettle, a large number of uniformly distributed tiny bubbles are formed in the reaction kettle under low-speed stirring, in the process of slow floating, trace water vapor originally mixed in the lard can be quickly separated from the oil phase and taken out of the kettle cavity together with the floating bubbles, and a high-temperature vacuum drying process does not need to be additionally added.

Description

Technical Field

[0001] This invention relates to the field of animal fat refining and processing technology, specifically to a device for decolorizing refined lard using a bio-enzymatic method. Background Technology

[0002] Freshly rendered lard often contains pigment impurities and colored oxidative products generated during processing. Some lard scraps that have been stored for a long time and become rancid will darken in color further, directly affecting the transparency of the lard and failing to meet the sensory standards for edible lard.

[0003] Conventional lard decolorization often employs a high-temperature clay adsorption process at 95-100℃, which not only consumes a large amount of adsorbent but also easily exacerbates lard oxidation at high temperatures, damaging the flavor of the oil. Traditional chemical decolorization methods pose a risk of chemical reagent residue and are no longer suitable for the current trend of healthy oils. The industry urgently needs a gentle, low-energy-consumption new decolorization technology. Bio-enzymatic decolorization aims to replace traditional high-temperature processes, achieving efficient decolorization and impurity removal while preserving the original flavor of lard. This approach also aligns closely with the development direction of other bio-industries pursuing green and low-consumption processing.

[0004] In existing technologies, lipase is added to pretreated lard, and the reaction is carried out in a mild solvent-free environment at 35-45℃ for 2-4 hours to achieve lard decolorization. After decolorization and filtration, the lard is vacuum dried to remove impurities. However, during the reaction, moisture in the lard generally evaporates. To prevent water vapor from accumulating in the reactor and re-condensing back into the lard, inert gas can be introduced to remove the evaporating water vapor. Conventional gas-assisted oil reaction equipment often adopts a continuous ventilation structure throughout the process, with a fixed-direction jet mode at the bottom of the reactor. This can only form a fixed flow field in a single direction within the reactor. Top-mounted single-axis stirring alone cannot cover the bottom edge and the area near the reactor wall. This causes lipase particles to continuously accumulate and settle in the corners of the reactor bottom on the opposite side of the airflow, forming a permanent stirring dead zone, resulting in a decrease in the uniformity of lard decolorization. Summary of the Invention

[0005] The purpose of this invention is to provide a bio-enzymatic decolorization apparatus for refined lard, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A bio-enzymatic decolorization device for refined lard includes a support frame, an insulated tank on the support frame, a reaction vessel nested inside the insulated tank, and a stirring component for mixing materials pre-installed inside the reaction vessel cavity. The switching mechanism is mounted on the support frame, and four sets of independent conveying components are connected at equal angles along a circular trajectory on it, and each set of conveying components is connected to the inner bottom of the reactor in different directions. The pumping mechanism is installed on the support frame and connected to the air inlet of the switching mechanism. When the pumping mechanism delivers gas into the switching mechanism, the switching mechanism can intermittently perform gas path switching. After each switching, it can align the gas path with two sets of conveying components arranged in a central symmetrical manner, and direct the airflow into two diagonal areas of the bottom of the vessel. A control mechanism, mounted on the support frame and connected to the switching mechanism, is used to control the intermittent switching action of the switching mechanism, allowing gas to be alternately injected along different diagonal paths at the bottom of the vessel.

[0007] The apparatus for decolorizing refined lard using the bio-enzymatic method described above: the pumping mechanism includes an air pump, which is mounted on the support frame. The air pump has an air inlet end and an air outlet end. An air inlet pipe is connected to the air inlet end, and an air delivery pipe is connected to the air outlet end. The end of the air delivery pipe away from the air pump is sealed and connected to the switching mechanism.

[0008] The apparatus for decolorizing refined lard using the bio-enzymatic method described above includes: an exhaust port at the top of the reactor, an exhaust pipe connected to the exhaust port, the end of the exhaust pipe penetrating the insulation tank and connected to the air inlet pipe, a drying tank connected in series on the exhaust pipe section, the drying tank being filled with molecular sieve desiccant, which can adsorb and dry the moisture carried by the material in the gas flowing in the exhaust pipe, and the treated dried gas can be sent into the air inlet pipe to achieve closed-loop recycling.

[0009] The apparatus for decolorizing refined lard using the bio-enzymatic method described above: the stirring assembly includes a stirring shaft, the bottom end of which is rotatably mounted at the center of the bottom of the reaction vessel via a sealed bearing, and the other end of which passes through the heat preservation tank and extends out of the heat preservation tank. A stirring motor is installed on the heat preservation tank, and the output shaft of the stirring motor is connected to the stirring shaft. Multiple stirring blades are equidistantly installed along the circumferential direction at one end of the stirring shaft located inside the reaction vessel.

[0010] The apparatus for decolorizing refined lard using the bio-enzymatic method described above: the switching mechanism includes a spherical seat, which is sealed to the end of the gas supply pipe away from the gas pump and the internal gas passages are interconnected. Four sets of radially arranged through holes are opened at equal angles along the circumference on the side wall of the spherical seat. The switching mechanism further includes a ball valve, which is rotatably installed in the internal cavity of the spherical seat. The rotating shaft of the ball valve extends out of the spherical seat and is rotatably connected to the support frame. The ball valve has a guide hole arranged radially through it and an air inlet hole arranged along the axial direction and communicating with the guide hole. The air inlet hole is aligned with the air supply pipe. The two ends of the guide hole can be aligned and communicated with any two centrally symmetrically arranged through holes after the ball valve rotates at a preset angle.

[0011] The apparatus for decolorizing refined lard using the bio-enzymatic method described above: the conveying component includes a connecting pipe, one end of which is connected to the spherical seat and aligned with the through hole; the outer sleeve of the heat preservation tank is provided with a sleeve with four sets of circular holes; the other end of the connecting pipe extends through the positioning circular hole and into the interlayer cavity between the heat preservation tank and the reaction vessel.

[0012] The apparatus for decolorizing refined lard using the bio-enzymatic method described above has multiple air inlets distributed circumferentially at the bottom of the reactor. Each air inlet is equipped with an inclined downward-facing insertion tube. One end of the insertion tube extends into the interior of the reactor, and the other end is connected to the connecting pipe and communicates with its inner side.

[0013] The apparatus for decolorizing refined lard using the bio-enzymatic method described above: the control mechanism includes a drive shaft, which is rotatably mounted on the support frame. A switching motor is mounted on the support frame. The output shaft of the switching motor is connected to the drive shaft via a coupling. A cam is arranged along the axial direction of the drive shaft, and two sets of intersecting and independent closed guide grooves are formed on the cam. The control mechanism further includes a push transmission component, which is disposed on the support frame and is respectively connected to the rotating shafts of the cam and the ball valve.

[0014] The apparatus for decolorizing refined lard using the bio-enzymatic method described above: the pushing transmission component includes a transmission shaft, a receiving frame is mounted on the support frame, the transmission shaft is rotatably mounted on the receiving frame, the transmission shaft is connected to the ball valve shaft via a bevel gear set, and a limit groove is formed on the transmission shaft; The push transmission component further includes: a slider, which is slidably mounted on the receiving frame; a collar is slidably sleeved on the transmission shaft along the axial direction; the collar is connected to the slider; and a ball bearing that is movably disposed on the inner wall of the collar and is adapted to slide with the limiting groove.

[0015] The apparatus for decolorizing refined lard using the bio-enzymatic method described above: an elastic extrusion member is connected between the slider and the cam, the elastic extrusion member includes a guide rod, the guide rod is slidably disposed on the slider, and the moving direction of the guide rod is perpendicular to the moving direction of the slider, and the end of the guide rod near the slider is formed with a convex circle that can be embedded in the groove; The elastic extrusion component further includes a spring, which is sleeved on the guide rod, with one end of the spring abutting against the slider and the other end abutting against the convex ring formed by the guide rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are: By relying on the suitable reaction temperature range of lipase (35-45℃), there is no need to configure additional high-temperature vacuum drying equipment. Trace amounts of moisture can be removed simultaneously within the 2-4 hour reaction cycle of enzymatic decolorization. Inert bubbles are used as water vapor carriers to break the gas-liquid balance on the surface of lard and quickly carry away the trace amounts of moisture remaining in the lard from the reactor. This not only avoids the problem of oil oxidation and rancidity caused by high-temperature treatment in traditional processes, but also saves the equipment investment and time cost of a separate drying process, effectively improving the overall production efficiency. By employing an intermittent jetting operation mode with four sets of diagonally alternating conveyors, the consumption of inert gas can be effectively reduced compared to a structure with continuous ventilation throughout the entire process. The diagonally alternating jetting airflow will form two dynamically changing turbulent flows at the bottom of the vessel, creating a coordinated mixing effect with the top stirring components. When the first set of diagonally alternating conveyors jets air, the airflow will carry the lipase particles that have settled at the bottom of the vessel to the opposite diagonal area, slowly moving them to prevent the lipase from being locally deposited and deactivated at the bottom of the vessel. After the switching mechanism completes one gas path switching, the second set of diagonally alternating conveyors starts jetting air, and the airflow direction is completely reversed, causing the oil to form a reverse microcirculation. This allows the oil that was originally close to the vessel wall and in the stirring blind zone to fully contact the lipase, effectively eliminating the bottom stirring dead zone that exists in conventional single-axis stirring, and significantly increasing the collision and contact between the lipase and pigment molecules. The water-containing inert gas carried out from the reactor body enters the drying tank through a drying tank set in a series pipeline. The molecular sieve filled inside can deeply adsorb and remove the water vapor in the gas flow. The dried gas after treatment flows directly back to the gas pump inlet to participate in the transportation again. There is no gas emission to the outside throughout the process. This not only avoids a large waste of inert gas, but also completely isolates the outside air from the high-temperature oil, preventing the oil from oxidizing and deteriorating. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a device for decolorizing refined lard using a biological enzymatic method. Figure 2 This is a schematic diagram of the apparatus for decolorizing refined lard using a biological enzymatic method from another angle. Figure 3This is a schematic diagram of the pumping mechanism in a bio-enzymatic decolorization device for refined lard. Figure 4 This is a schematic diagram of the conveyor components in an apparatus for decolorizing refined lard using a bio-enzymatic method. Figure 5 This is a schematic diagram of the tubes and conveying components in an apparatus for decolorizing refined lard using a biological enzymatic method. Figure 6 This is a schematic diagram of the switching mechanism in a bio-enzymatic decolorization device for refined lard. Figure 7 This is a schematic diagram of the control mechanism in an enzymatic decolorization device for refined lard. Figure 8 A schematic diagram of the push transmission component in a device for decolorizing refined lard using a biological enzymatic method; Figure 9 This is a schematic diagram of the elastic extrusion component in a bio-enzymatic decolorization device for refined lard. Figure 10 This is a schematic cross-sectional view of the reaction vessel and the heat preservation tank in the apparatus for decolorizing refined lard using a bio-enzymatic method.

[0018] In the diagram: 1. Support frame; 2. Insulated tank; 3. Reactor; 301. Air inlet; 4. Drive shaft; 401. Limiting groove; 5. Stirring motor; 6. Stirring shaft; 7. Stirring blades; 8. Air pump; 9. Air inlet pipe; 10. Exhaust pipe; 11. Drying tank; 12. Gas delivery pipe; 13. Spherical seat; 14. Connecting pipe; 15. Sleeve; 16. Insertion pipe; 17. Ball valve; 1701. Air inlet; 1702. Guide hole; 18. Bevel gear set; 19. Support frame; 20. Switching motor; 21. Drive shaft; 22. Cam; 2201. Slide groove; 23. Slider; 24. Guide rod; 2401. Convex circle; 25. Spring; 26. Collar. Detailed Implementation

[0019] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0020] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0021] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0022] Please see Figures 1-10 In this embodiment of the invention, a device for decolorizing refined lard using a bio-enzymatic method includes a support frame 1, a heat preservation tank 2 is provided on the support frame 1, a reaction vessel 3 is nested inside the heat preservation tank 2, and a stirring component for mixing materials is preset inside the cavity of the reaction vessel 3. The switching mechanism is mounted on the support frame 1, and four sets of independent conveying components are connected at equal angles along the annular trajectory on it. Each set of conveying components is connected to the inner bottom of the reactor 3 in different directions. The pumping mechanism is installed on the support frame 1 and connected to the air inlet of the switching mechanism. When the pumping mechanism delivers gas into the switching mechanism, the switching mechanism can intermittently perform gas path switching. After each switching, it can align the gas path with two sets of conveying components arranged in a central symmetrical manner, and direct the airflow into two diagonal areas of the bottom of the vessel. The control mechanism is mounted on the support frame 1 and is connected to the switching mechanism for transmission. It is used to control the intermittent switching action of the switching mechanism, which allows gas to be injected alternately along different diagonal paths at the bottom of the vessel.

[0023] In the normal decolorization process, lipase is added to the pretreated lard, and the reaction is carried out for 2-4 hours in a mild solvent-free environment at 35-45℃ to remove pigments from the lard. Conventional refined lard will have a trace amount of residual moisture, and the lard is usually dried after the reaction. However, in this embodiment, during the low-speed stirring of the lipase and lard in the reaction vessel 3 by the stirring component, the residual moisture in the lard will evaporate in the 40℃ environment of the vessel cavity. At this time, the control mechanism and the pumping mechanism are started simultaneously. The pumping mechanism can deliver inert gas to the switching mechanism. Under the precise transmission control of the control mechanism, the switching mechanism completes the switching according to the preset intermittent switching rhythm. The gas reversal action, after each action is completed, will simultaneously connect a set of independent conveyors distributed diagonally in the center, and introduce inert gas into two diagonal areas at the bottom of the inner side of the reactor 3. The inert gas sprayed from the diagonal position at the bottom of the reactor will form a large number of uniformly distributed micro bubbles in the reactor 3 with low-speed stirring. As these bubbles slowly rise, they can break the local gas-liquid balance near the surface of the lard, significantly increase the evaporation rate of residual moisture, and allow the trace water vapor originally mixed in with the lard to quickly leave the oil phase and be carried out of the reactor cavity with the rising bubbles. Without the need for an additional high-temperature vacuum drying process, the decolorization reaction and dehydration operation can be completed simultaneously within the mild temperature range of 35~45℃ for enzyme reaction.

[0024] Importantly, the four sets of diagonally alternating conveyors employ an intermittent jetting operation mode, which effectively reduces inert gas consumption compared to a structure with continuous ventilation throughout the entire process. The diagonally alternating airflow creates two dynamically changing turbulent flows at the bottom of the vessel, forming a coordinated mixing effect with the top stirring components. When the first set of diagonally alternating conveyors jets air, the airflow carries the lipase particles that have settled at the bottom of the vessel to the opposite diagonal area, preventing the lipase from being locally deposited and deactivated at the bottom. After the switching mechanism completes one air path switch, the second set of diagonally alternating conveyors begins jetting air, completely reversing the airflow direction and causing the oil to form a reverse microcirculation. This allows the oil that was originally close to the vessel wall and in the stirring blind zone to fully contact the lipase, effectively eliminating the bottom stirring dead zone present in conventional single-axis stirring, and significantly increasing the collision and contact between the lipase and pigment molecules.

[0025] As a further embodiment of the present invention, please refer to... Figure 3 The pumping mechanism includes an air pump 8, which is mounted on the support frame 1. The air pump 8 has an air inlet end and an air outlet end. An air inlet pipe 9 is connected to the air inlet end, and an air delivery pipe 12 is connected to the air outlet end. The end of the air delivery pipe 12 away from the air pump 8 is sealed and connected to the switching mechanism.

[0026] The top of the reactor 3 is provided with an exhaust port, and an exhaust pipe 10 is connected to the exhaust port. The end of the exhaust pipe 10 can pass through the heat preservation tank 2 and is connected to the air inlet pipe 9. A drying tank 11 is connected in series on the section of the exhaust pipe 10. The drying tank 11 is filled with molecular sieve desiccant, which can adsorb and dry the material moisture carried by the gas flowing in the exhaust pipe 10. The dried gas after treatment can be sent into the air inlet pipe 9 to achieve closed-loop recycling.

[0027] During the decolorization process of lard, the air pump 8 continuously provides a stable inert gas supply to the entire gas path. The inert gas output from the exhaust end is directly sent into the switching mechanism through the gas supply pipe 12. Under the intermittent gas path switching action of the control mechanism, it is directionally introduced into the diagonal conveying passage at the bottom of the reactor 3. It slowly passes through the entire reactor 3 in the form of tiny bubbles. As the bubbles slowly rise, the trace amounts of water vapor originally mixed in with the lard can quickly detach from the lard and be carried out of the reactor cavity along with the rising bubbles. Using the rising inert bubbles as water vapor carriers, the deep removal of trace amounts of moisture is completed in the synchronous stage of the decolorization reaction, without the need for additional high-temperature vacuum drying equipment.

[0028] The gas carrying moisture eventually overflows from the exhaust port at the top of the reactor 3 and enters the exhaust pipe 10 that runs through the insulation tank 2. When the mixed gas flow carrying water vapor passes through the drying tank 11 connected in series on the pipe section, the molecular sieve desiccant filled in the tank will deeply adsorb and remove the residual moisture in the gas. The inert gas after drying will be directly connected to the air inlet pipe 9 connected to the air inlet end of the air pump 8, and will be drawn again by the air pump 8 and sent into the next round of circulation process. No gas is discharged to the outside throughout the process, forming a completely closed-loop gas circulation circuit.

[0029] In one embodiment, the stirring assembly includes a stirring shaft 6. The bottom end of the stirring shaft 6 is rotatably mounted at the center of the bottom of the reactor 3 via a sealed bearing, and the other end passes through the insulation tank 2 and extends out of the insulation tank 2. A stirring motor 5 is mounted on the insulation tank 2, and the output shaft of the stirring motor 5 is connected to the stirring shaft 6. Multiple stirring blades 7 are equidistantly mounted along the circumferential direction at one end of the stirring shaft 6 located inside the reactor 3.

[0030] As a further embodiment of the present invention, please refer to... Figure 5 and Figure 6 The switching mechanism includes a spherical seat 13, which is sealed to the end of the air supply pipe 12 away from the air pump 8 and the internal air passages are interconnected. Four sets of radially arranged through holes are opened at equal angles along the circumference on the side wall of the spherical seat 13. The switching mechanism further includes a ball valve 17, which is rotatably installed in the internal cavity of the spherical seat 13. The rotating shaft of the ball valve 17 extends out of the spherical seat 13 and is rotatably connected to the support frame 1. The ball valve 17 has a guide hole 1702 arranged radially through it and an air inlet 1701 arranged along the axial direction and communicating with the guide hole 1702. The air inlet 1701 is aligned with the air supply pipe 12. The two ends of the guide hole 1702 can be aligned and communicated with any two centrally symmetrically arranged through holes after the ball valve 17 rotates at a preset angle.

[0031] The conveying component includes a connecting pipe 14. One end of the connecting pipe 14 is connected to the spherical seat 13 and aligned with the through hole. The heat preservation tank 2 is fitted with a sleeve 15, on which four sets of round holes are formed. The other end of the connecting pipe 14 extends through the positioning round hole and into the interlayer cavity between the heat preservation tank 2 and the reaction vessel 3.

[0032] The bottom of the reactor 3 has multiple air inlets 301 distributed around the circumference. Each air inlet 301 is equipped with a downward-sloping insertion tube 16. One end of the insertion tube 16 extends into the interior of the reactor 3, and the other end is connected to the connecting tube 14 and communicates with the inside.

[0033] After the air pump 8 is started, inert gas is continuously sent into the internal cavity of the spherical seat 13 through the air supply pipe 12. The airflow will flow directly into the internal channel of the ball valve 17 through the pre-aligned air inlet 1701. At this time, the ball valve 17 is in the initial working position, and its radially penetrating guide hole 1702 is exactly aligned with a set of two centrally symmetrically arranged through holes on the side wall of the spherical seat 13. This allows the inert gas in the inner cavity of the ball valve 17 to be sent out from these two through holes simultaneously, and to be diverted along the corresponding two sets of connecting pipes 14. The diverted airflow first passes through the interlayer cavity between the heat preservation tank 2 and the reactor 3, and is sprayed into the bottom of the reactor 3 at an angle downward along the inclined insertion pipe 16 at the bottom of the reactor 3. The two sets of diagonally opposite inert gas sprayed out alternately in different directions, so that the lipase and lard can effectively contact the bottom edge area that is difficult for the stirring blade 7 to reach, and drive the enzyme particles deposited at the bottom to float slowly, forming a synergistic mixing effect with the low-speed stirring component at the top.

[0034] It should be noted that in the mild reaction environment of 40℃, the trace amount of moisture remaining in the lard will naturally evaporate to form water vapor. The inert gas introduced, as a carrier gas that is insoluble in the oil phase, will form a large number of tiny bubbles in the reactor, breaking the gas-liquid balance near the oil surface and continuously carrying away the water vapor that evaporates from the inside of the lard. Timely removal of evaporated water vapor can prevent water vapor from accumulating in the reactor and recondensing back into the lard. At the same time, it can prevent the accumulation of water vapor in the reactor from reducing the reaction rate of the enzyme, allowing the lipase to maintain a highly efficient decolorization catalytic rate.

[0035] When the control mechanism drives the ball valve 17 to rotate 90° around the shaft inside the spherical seat 13, the two sets of through holes that were originally aligned and connected will be misaligned with the guide hole 1702. The guide hole 1702 will then rotate to the position of the next set of two centrally symmetrical through holes. The gas path will then complete a leak-free switch, and the inert gas will be ejected obliquely from the two new diagonal positions. The flow field direction inside the vessel will be reversed synchronously. This avoids dead zones in the process of removing water vapor by inert gas without consuming additional inert gas.

[0036] As a further embodiment of the present invention, please refer to... Figures 7-10 The control mechanism includes a drive shaft 21, which is rotatably mounted on the support frame 1. A switching motor 20 is mounted on the support frame 1. The output shaft of the switching motor 20 is connected to the drive shaft 21 via a coupling. A cam 22 is provided along the axial direction of the drive shaft 21. Two sets of intersecting and independent closed guide grooves 2201 are formed on the cam 22. The control mechanism further includes a push transmission component, which is disposed on the support frame 1 and is respectively connected to the rotating shafts of the cam 22 and the ball valve 17.

[0037] The push transmission component includes a transmission shaft 4, a receiving frame 19 is mounted on the support frame 1, the transmission shaft 4 is rotatably mounted on the receiving frame 19, the transmission shaft 4 is connected to the rotating shaft of the ball valve 17 through a bevel gear set 18, and a limit groove 401 is formed on the transmission shaft 4. The push transmission component further includes: a slider 23, which is slidably mounted on the receiving frame 19. The transmission shaft 4 is slidably sleeved with a collar 26 along the axial direction. The collar 26 is connected to the slider 23, and the inner wall of the collar 26 is movably provided with balls that are slidably adapted to the limiting groove 401.

[0038] An elastic pressing member is connected between the slider 23 and the cam 22. The elastic pressing member includes a guide rod 24. The guide rod 24 is slidably disposed on the slider 23, and the moving direction of the guide rod 24 is perpendicular to the moving direction of the slider 23. The end of the guide rod 24 near the slider 23 is formed with a convex circle 2401 that can be embedded in the groove 2201. The elastic extrusion component further includes a spring 25, which is sleeved on the guide rod 24. One end of the spring 25 abuts against the slider 23, and the other end abuts against the convex ring formed by the guide rod 24.

[0039] Specifically, during the stirring process inside the reactor 3, the switching motor 20 is activated. The switching motor 20 drives the drive shaft 21 to rotate at a constant low speed via a coupling. The cam 22 mounted on the drive shaft 21 rotates synchronously with the shaft. Two sets of intersecting and independent closed guide grooves 2201 on the surface of the cam 22 will drive the convex circle 2401 embedded in the groove to complete continuous movement along a preset trajectory as it rotates. In the initial state, the spring 25 is in a pre-compressed state, and the convex circle 2401 at the end of the guide rod 24 always remains in close contact with the inner wall of the groove 2201. When the cam 22 rotates, the change in the trajectory of the groove 2201 will be transmitted through the guide rod 2401 to the inner wall of the groove 2201. 4 drives the slider 23 to reciprocate linearly along the horizontal direction on the receiving frame 19. The slider 23 synchronously drives the collar 26 connected to it to slide synchronously along the axial direction of the transmission shaft 4. During the axial sliding process of the ball ball movably set on the inner wall of the collar 26, it will follow the guide trajectory of the limiting groove 401 to directly convert the linear reciprocating motion of the collar 26 into the fixed angle intermittent rotation of the transmission shaft 4. This realizes the preset angle rotation of the ball valve 17 each time, ensuring that the guide hole 1702 can be completely aligned with any one of the two centrally symmetrically arranged through holes after each rotation of the ball valve 17, realizing the cyclic alternating jetting of the four sets of diagonal gas paths at the bottom of the vessel.

[0040] It should be noted that the limiting groove 401 is divided into an inclined groove and straight grooves set at both ends of the inclined groove. The straight grooves are set to limit and buffer the rotation of the ball valve 17, ensuring that the ball valve 17 will remain completely locked in the current position after rotating at the preset angle, so that the guide hole 1702 and the corresponding set of diagonal connecting holes are accurately aligned for a long time, and there will be no misalignment or leakage of the air path, ensuring that the inert gas can be stably and continuously sprayed out from the two preset diagonal positions.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bio-enzymatic decolorization device for refined lard, comprising a support frame (1), a heat-insulating tank (2) mounted on the support frame (1), a reaction vessel (3) nested inside the heat-insulating tank (2), and a stirring assembly for mixing materials pre-installed inside the cavity of the reaction vessel (3); characterized in that: The switching mechanism is mounted on the support frame (1), and four independent conveying components are connected at equal angles along the circular trajectory. Each of the conveying components is connected to the inner bottom of the reactor (3) in different directions. The pumping mechanism is installed on the support frame (1) and connected to the air inlet of the switching mechanism. When the pumping mechanism delivers gas into the switching mechanism, the switching mechanism can intermittently perform the gas path switching action. After each switching, it can achieve gas path alignment with a set of two sets of conveying components arranged in a central symmetrical manner, and direct the airflow into the two diagonal areas of the bottom of the vessel. The control mechanism is set on the support frame (1) and connected to the switching mechanism for transmission. It is used to control the intermittent switching action of the switching mechanism, so that the gas can be alternately injected along different diagonal paths at the bottom of the vessel.

2. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 1, characterized in that, The pumping mechanism includes an air pump (8) mounted on the support frame (1). The air pump (8) has an air inlet end and an air outlet end. An air inlet pipe (9) is connected to the air inlet end, and an air delivery pipe (12) is connected to the air outlet end. The end of the air delivery pipe (12) away from the air pump (8) is sealed and connected to the switching mechanism.

3. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 2, characterized in that, The reactor (3) has an exhaust port at the top, and an exhaust pipe (10) is connected to the exhaust port. The end of the exhaust pipe (10) can pass through the heat preservation tank (2) and is connected to the air inlet pipe (9). A drying tank (11) is installed in series on the section of the exhaust pipe (10). The drying tank (11) is filled with molecular sieve desiccant, which can adsorb and dry the material moisture carried by the gas flowing in the exhaust pipe (10). The dried gas after treatment can be sent into the air inlet pipe (9) to achieve closed-loop recycling.

4. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 1, characterized in that, The stirring assembly includes a stirring shaft (6), the bottom end of which is rotatably mounted at the center of the bottom of the reactor (3) via a sealed bearing, and the other end of which passes through the heat preservation tank (2) and extends out of the heat preservation tank (2). A stirring motor (5) is installed on the heat preservation tank (2), and the output shaft of the stirring motor (5) is connected to the stirring shaft (6) in a transmission manner. Multiple stirring blades (7) are equidistantly installed along the circumferential direction at one end of the stirring shaft (6) inside the reactor (3).

5. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 2, characterized in that, The switching mechanism includes a spherical seat (13), which is sealed to the end of the gas pipe (12) away from the gas pump (8) and the internal gas passages are interconnected. Four sets of radially arranged through holes are opened at equal angles along the circumference on the side wall of the spherical seat (13). The switching mechanism further includes a ball valve (17), which is rotatably installed in the cavity inside the spherical seat (13). The rotating shaft of the ball valve (17) extends out of the spherical seat (13) and is rotatably connected to the support frame (1). The ball valve (17) is provided with a guide hole (1702) arranged radially through and an air inlet (1701) arranged along the axial direction and communicating with the guide hole (1702). The air inlet (1701) is aligned with the air supply pipe (12). The two ends of the guide hole (1702) can be aligned and communicated with any two centrally symmetrically arranged through holes after the ball valve (17) rotates at a preset angle.

6. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 5, characterized in that, The conveying component includes a connecting pipe (14), one end of which is connected to the spherical seat (13) and aligned with the through hole. The heat preservation tank (2) is covered with a sleeve (15), which has four sets of round holes. The other end of the connecting pipe (14) extends through the positioning round hole and into the interlayer cavity between the heat preservation tank (2) and the reaction vessel (3).

7. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 6, characterized in that, The bottom of the reactor (3) has multiple air inlets (301) distributed around the circumference. Each air inlet (301) is equipped with a downward-sloping insertion tube (16). One end of the insertion tube (16) extends into the reactor (3), and the other end is connected to the connecting tube (14) and communicates with the inside.

8. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 5, characterized in that, The control mechanism includes a drive shaft (21), which is rotatably mounted on the support frame (1). A switching motor (20) is mounted on the support frame (1). The output shaft of the switching motor (20) is connected to the drive shaft (21) via a coupling. A cam (22) is provided along the axial direction of the drive shaft (21). Two sets of intersecting and independent closed guide grooves (2201) are formed on the cam (22). The control mechanism further includes a push transmission component, which is disposed on the support frame (1) and is respectively connected to the shafts of the cam (22) and the ball valve (17).

9. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 8, characterized in that, The push transmission component includes a transmission shaft (4), and a receiving frame (19) is installed on the support frame (1). The transmission shaft (4) is rotatably mounted on the receiving frame (19). The transmission shaft (4) is connected to the rotating shaft of the ball valve (17) through a bevel gear set (18), and a limit groove (401) is formed on the transmission shaft (4). The push transmission component further includes: a slider (23), which is slidably mounted on the receiving frame (19), and a collar (26) is slidably sleeved on the transmission shaft (4) along the axial direction. The collar (26) is connected to the slider (23), and a ball is movably arranged on the inner wall of the collar (26) to slide and adapt to the limiting groove (401).

10. The apparatus for decolorizing refined lard using a bio-enzymatic method according to claim 9, characterized in that, An elastic extrusion member is connected between the slider (23) and the cam (22). The elastic extrusion member includes a guide rod (24). The guide rod (24) is slidably disposed on the slider (23), and the moving direction of the guide rod (24) is perpendicular to the moving direction of the slider (23). The end of the guide rod (24) near the slider (23) is formed with a convex circle (2401) that can be embedded in the groove (2201). The elastic extrusion component further includes a spring (25), which is sleeved on the guide rod (24). One end of the spring (25) abuts against the slider (23), and the other end abuts against the convex ring formed by the guide rod (24).

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