A refining apparatus for industrial-grade blended oils

Abstract

This invention relates to the field of bio-based oil refining technology, and proposes an industrial-grade refining apparatus for mixed oils. The apparatus includes a mixing cylinder equipped with a stirring assembly and a wall-scraping auxiliary mechanism, and a drive mechanism at the top to drive the stirring assembly in a three-dimensional composite lifting motion. A disc centrifuge is located directly below the mixing cylinder, with a guide pipe fixed at its top, communicating with the bottom of the mixing cylinder. The bottom of the guide pipe has symmetrically arranged spiral guide channels and horizontal discharge ports. A disc assembly is coaxially arranged inside the disc centrifuge, with the gap between adjacent discs decreasing sequentially from bottom to top. This technical solution solves the problems in existing degumming processes, such as the large speed difference between long pipe conveying and centrifugal feeding leading to secondary breakage of fragile bio-phospholipid flocs, easy pipe blockage due to cooling, easy blockage at the bottom of traditional evenly spaced discs (for coarse separation), low purity at the top (for fine separation), and low mixing efficiency of traditional stirring structures.

Description

Technical Field

[0001] This invention relates to the field of bio-based oil refining technology, specifically to a refining apparatus for industrial-grade blended oils. Background Technology

[0002] In modern biotechnology and oilseed processing, extracting bio-based oils (mainly triglycerides) from various plant seeds, microorganisms, and microalgae is a highly economically valuable industrial segment. Currently, large-scale extraction of biomass oils commonly employs solvent extraction, resulting in a primary product known as extracted blended oil. This bio-based extracted blended oil, in addition to containing the target oil, is rich in non-triglyceride impurities, especially biocolloids, primarily phospholipids. If these phospholipids are not removed promptly, they can easily cause emulsification, darkening of color, and off-odors during subsequent heating or storage, severely impacting the purity and quality of the bio-oils.

[0003] Hydration degumming is currently the most crucial process step in separating non-hydrated phospholipids from leached mixed oils. Its basic principle involves adding a specific amount of hydration solution (such as water, citric acid, or phosphoric acid solution) to the leached mixed oil at a specific temperature. This causes the dissolved phospholipid molecules to absorb water and swell, coalescing into larger flocculent masses (i.e., hydrated oil residue / phospholipid colloids). Centrifugal force is then used to separate the heavy phase phospholipid flocculents from the light phase purified oil.

[0004] However, existing hydration degumming equipment and processes have the following significant drawbacks in actual production: First, existing processes generally adopt a combined architecture of "independent hydration reaction tank + material transfer pump + external centrifuge". After the hydrated colloids are coagulated in the reaction tank, they need to be extracted to the centrifuge via long pipelines and powerful transfer pumps. Due to the extremely fragile structure of bio-phospholipid flocs, the high-speed impeller shearing force of the transfer pump can easily cause secondary breakage of the newly formed colloid flocs; at the same time, long-distance pipeline transportation can easily cause material temperature loss, leading to a sharp increase in the viscosity of the mixture rich in bio-colloids, frequently causing pipeline blockage. Second, most existing centrifuges adopt an equally spaced disc assembly structure. In the initial stage of separation, the bottom of the mixture contains a large number of high-concentration, viscous, large-particle oil residues, and the narrow, equally spaced channels are easily blocked by these large heavy-phase impurities; while the tiny water droplets and residual fine colloids to be separated in the upper part have a long settling distance due to the lack of gap contraction, resulting in limited separation and retention efficiency, and the purity of the final discharged bio-oil is difficult to meet high standards. Third, traditional reaction vessels typically use a single central axis agitator blade, resulting in significant fluid dead zones inside. The injection of hydration agents mostly involves direct surface pouring or simple spraying, making it difficult to achieve efficient three-dimensional fusion with mixed oils containing complex bio-lipids in a very short time. This leads to incomplete demulsification and coagulation reactions, affecting degumming yield. Summary of the Invention

[0005] To overcome the above-mentioned defects, the present invention provides an industrial-grade refining device for mixed oils, which solves the problems of the existing degumming process, such as the large speed difference of long pipe conveying and centrifugal feeding, which easily leads to the secondary breakage of fragile biophospholipid colloidal flocs, and the pipeline is easily blocked by cooling. At the same time, the traditional equal-spacing disc bottom coarse separation is easy to block, the upper fine separation has low purity, and the traditional stirring structure has low mixing efficiency.

[0006] According to one aspect, at least one embodiment of the present invention provides an industrial-grade blended oil refining apparatus, comprising: A frame, the frame including a base plate and a mounting bracket, the mounting bracket being fixed to the top wall of the base plate; A mixing cylinder is fixed to the top of the mounting frame. The mixing cylinder is equipped with a stirring assembly and an auxiliary mechanism. A feed pipe with a valve is fixedly connected to one side of the top wall of the mixing cylinder. A drive mechanism for driving the stirring assembly to rotate is installed in the middle of the top wall of the mixing cylinder. A protective mechanism is installed on the top wall of the mixing cylinder and sleeved on the outside of the drive mechanism; The liquid inlet pipe has its bottom end connected to the top of the drive mechanism via a rotary joint, and its top end connected to an external water pump via a connecting pipe. A disc centrifuge is fixed on the top wall of the base plate. A guide pipe connected to the bottom of the mixing drum cavity is fixed at the top of the disc centrifuge. A disc assembly is installed at the center of the inner cavity of the disc centrifuge.

[0007] For example, in a refining apparatus for industrial-grade mixed oil provided by at least one embodiment of the present invention, the stirring assembly includes a hollow main shaft, the top end of the main shaft slidingly penetrating through the top wall of the mixing cylinder, a plurality of parallel connecting rods symmetrically rotatably mounted on the side wall of the main shaft, and a plurality of hollow fixed shafts symmetrically fixed on the side wall of the main shaft. Each set of connecting rods is rotatably connected to the same vertical shaft at the end furthest from the main shaft; Limit sliders are fixed at the top of each vertical axis; The inner cavity of the fixed shaft is connected to the inner cavity of the main shaft, and a number of nozzles with one-way valves are symmetrically installed on the side wall of the fixed shaft.

[0008] For example, in a refining apparatus for industrial-grade mixed oil provided in at least one embodiment of the present invention, the auxiliary mechanism includes a mounting ring, scrapers are symmetrically fixed on the outer side of the bottom wall of the mounting ring, and a plurality of limiting guide grooves are symmetrically opened on the bottom wall of the mounting ring. The scraper is in contact with the inner wall of the mixing cylinder; The limiting slider is slidably installed in the corresponding limiting guide groove.

[0009] For example, in a refining apparatus for industrial-grade mixed oil provided in at least one embodiment of the present invention, an annular groove is provided on the top wall of the mixing cylinder corresponding to the position of the mounting ring, and the mounting ring is rotatably mounted in the annular groove through a sealed bearing.

[0010] For example, in a refining apparatus for industrial-grade mixed oil provided in at least one embodiment of the present invention, the driving mechanism includes a sleeve and a driving motor, the sleeve is fixed at the center position of the top wall of the mixing cylinder, and a driven gear is rotatably installed at the top of the sleeve; The drive motor is fixed to one side of the top wall of the mixing drum, and a drive gear is fixed on the power shaft at the top of the drive motor. The driven gear meshes with the driving gear, and a hollow drive shaft is slidably mounted at the center of the driven gear; The drive shaft is fixed to the top end of the main shaft and connected to the main shaft. A hollow reciprocating lead screw is fixed to the top end of the drive shaft. The reciprocating lead screw is connected to the drive shaft, and a matching lead screw nut is installed on the reciprocating lead screw. The top end of the reciprocating lead screw is connected to the liquid inlet pipe through a rotary joint. The outer wall of the drive shaft is evenly provided with several limiting grooves, and the center position of the driven gear is provided with a toothed guide groove that matches the outer wall of the drive shaft.

[0011] For example, in an industrial-grade mixed oil refining apparatus provided by at least one embodiment of the present invention, the protective mechanism includes a protective shell and a connecting cylinder, the protective shell and the connecting cylinder are integrally formed and fixed on the top wall of the mixing cylinder, and the lead screw nut is fixed at the center position of the top wall of the protective shell.

[0012] For example, in a refining apparatus for industrial-grade mixed oil provided in at least one embodiment of the present invention, a piston plate is rotatably mounted on the outer side of the top end of the main shaft via a sealed bearing, and the piston plate is slidably mounted inside the sleeve.

[0013] For example, in a refining apparatus for industrial-grade mixed oil provided in at least one embodiment of the present invention, the feed pipe includes a pipe body, a connector fixed at the top of the pipe body to connect to the bottom of the inner cavity of the mixing cylinder, a material valve fixed at the top of the pipe body, a plurality of spiral feed channels symmetrically opened at the bottom of the pipe body, and a horizontal discharge port connected to the feed channels opened on the side wall and bottom wall of the pipe body.

[0014] For example, in a refining apparatus for industrial-grade mixed oil provided in at least one embodiment of the present invention, the disc group includes a plurality of coaxially arranged discs, and the gap between adjacent discs decreases sequentially from bottom to top.

[0015] For example, in an industrial-grade mixed oil refining apparatus provided by at least one embodiment of the present invention, an annular heating tube is embedded in the wall of the mixing cylinder, and a heater for controlling the working state of the heating tube is fixed outside the mixing cylinder.

[0016] The beneficial effects of the embodiments of the present invention are as follows: 1. In this invention, the mixing drum and disc centrifuge are integrated coaxially in a vertical manner, completely eliminating the need for conveying pumps and long-distance transfer pipelines that easily damage the structure of bio-flocs in existing technologies. The bio-colloidal flocs formed by the hydration reaction can sink directly into the centrifuge under constant temperature conditions by gravity, avoiding the problem of sudden viscosity increase and blockage caused by pipeline cooling, and maximizing the protection of the flocculent morphology of the hydrated oil residue.

[0017] 2. In this invention, the disc assembly adopts a gradually narrowing interception structure design. The large gap structure at the bottom effectively prevents high-concentration and large-particle viscous oil residue from clogging the internal flow channels. As the material climbs upward along the discs, the gradually narrowing gap effectively shortens the settling distance of tiny water droplets and fine suspended biomass as the concentration of the colloid decreases and the particle size of the impurities decreases, achieving fine interception and purification. Simultaneously, this invention features a specially designed guide pipe with a spiral guide channel and a horizontal discharge port at the bottom of the mixing cylinder. When the mixed liquid containing large-particle colloids falls to the bottom of the guide pipe, it is forced to spiral and accelerate along the spiral channel, smoothly converting the potential energy of the vertical fall into the initial kinetic energy of the horizontal tangential swirling flow. Finally, it is smoothly thrown into the separation chamber through the horizontal discharge port, which can reduce the velocity difference between the feed and the high-speed rotating chamber, effectively reducing the violent hydraulic impact and shear turbulence when transitioning from static to dynamic states, and effectively preventing secondary breakage of newly formed colloid flocs.

[0018] 3. The proposed drive mechanism, in conjunction with the main shaft, connecting rod, and vertical shaft limiting structure of the stirring assembly, enables the main shaft to perform reciprocating lifting motion while rotating, and forces the vertical shaft to undergo regular radial stretching and contraction through the mechanical connecting rod frame. This three-dimensional composite motion thoroughly and effectively reduces the dead zones of the fluid within the mixing drum; simultaneously, the hydrated liquid is directly injected into the violently churning liquid layers through the flow channel within the main shaft via a one-way nozzle using high-pressure dynamic misting, increasing the contact area between the hydrated agent and the bio-based mixed oil, promoting rapid demulsification and flocculation of the biocollagen, and shortening the reaction cycle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0020] Figure 1 This is a perspective view of the external structure of the present invention; Figure 2 This is a half-sectional perspective view of the internal structure of the protective mechanism in this invention; Figure 3 This is a perspective view of the driving mechanism and the internal structure of the mixing cylinder in this invention; Figure 4 This is a perspective view of the stirring assembly and auxiliary mechanism in this invention; Figure 5 This is a three-dimensional view of the stirring assembly structure in this invention; Figure 6 This is a three-dimensional view of the sleeve and drive shaft separated in this invention; Figure 7 This is a three-dimensional view of the feed tube structure in this invention; Figure 8 This is a perspective view of the internal disc assembly of the disc centrifuge in this invention; In the diagram: 1. Base plate; 2. Mounting frame; 3. Mixing cylinder; 4. Stirring assembly; 41. Main shaft; 42. Connecting rod; 43. Vertical shaft; 44. Fixed shaft; 45. Nozzle; 46. Limiting slider; 5. Auxiliary mechanism; 51. Mounting ring; 52. Scraper; 53. Limiting guide groove; 6. Drive mechanism; 61. Sleeve; 62. Driven gear; 63. Drive motor; 64. Drive gear; 65. Drive shaft; 66. Reciprocating screw; 67. Screw nut; 68. Limiting slide groove; 69. Toothed guide groove; 7. Protective shell; 8. Connecting cylinder; 9. Feed pipe; 10. Rotary joint; 11. Feed guide pipe; 111. Pipe body; 112. Connector; 113. Material valve; 114. Feed channel; 115. Discharge port; 12. Disc centrifuge; 13. Disc; 14. Liquid inlet pipe; 15. Piston plate. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0022] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0023] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0026] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Example 1

[0028] refer to Figure 1 , Figure 7 and Figure 8 This embodiment provides a refining apparatus for industrial-grade mixed oils, focusing on the overall integrated architecture and bottom centrifugal separation features of the apparatus for the hydration degumming process.

[0029] An industrial-grade blended oil refining apparatus includes a frame that provides integrated load-bearing support for the equipment. The frame includes a base plate 1 and a mounting bracket 2 fixed to the top wall of the base plate 1. A mixing cylinder 3 is fixed to the top of the mounting bracket 2. The mixing cylinder 3 serves as the reaction site for hydration and degumming. A feed pipe 9 with a valve is fixedly connected to one side of its top wall for pumping in undegummed leachable blended oil concentrate.

[0030] In traditional processes, the hydration reaction tank and centrifuge are usually installed separately, connected by long pipelines and a transfer pump. The mixed oil containing a large amount of flocculent hydrated phospholipids is prone to temperature drops and colloidal breakdown during transport. To address this issue, in this embodiment, a centrifugal separation system is directly installed at the bottom of the mixing cylinder 3. Specifically, a disc centrifuge 12 is fixed to the top wall of the bottom plate 1, and a feed pipe 11 is fixed to the top of the disc centrifuge 12, directly connecting to the bottom of the inner cavity of the mixing cylinder 3. After the hydration reaction is complete, the oil directly enters the disc centrifuge 12 through the feed pipe 11 due to gravity, eliminating the need for a transfer pump and intermediate pipelines, resulting in low heat loss and intact colloidal morphology.

[0031] To prevent the hydrated phospholipid flocs from breaking apart due to the large speed difference when the mixed oil enters the high-speed disc centrifuge 12, the feed pipe 11 has a specially designed structure. The feed pipe 11 includes a pipe body 111, with a connector 112 fixed at the top of the pipe body 111 to connect to the bottom of the inner cavity of the mixing cylinder 3, and a material valve 113 fixed at the top of the pipe body 111 to control the feed. Several spiral feed channels 114 are symmetrically opened at the bottom of the pipe body 111, and a horizontal discharge port 115 connected to the feed channels 114 is opened on the side wall and bottom wall of the pipe body 111. When the material containing hydrated colloids falls to the bottom of the feed pipe 11 under gravity, it accelerates along the spiral feed channels 114 and is thrown out tangentially from the horizontal discharge port 115, thus obtaining a certain initial swirling velocity in advance, and thus smoothly and gently enters the separation chamber of the centrifuge.

[0032] Furthermore, to accommodate the unique gum content in the extracted mixed oil, a disc assembly is installed at the center of the inner cavity of the disc centrifuge 12. This disc assembly comprises several coaxially arranged discs 13, with the gap between adjacent discs decreasing progressively from bottom to top. In the initial separation stage, when the mixed liquid just enters the bottom of the centrifuge, the concentration of hydrated phospholipid gum and heavy phase impurities is highest, and the floc particles are largest. The larger gap between the discs at the bottom ensures extremely high material throughput, effectively preventing high-concentration and large-particle viscous oil residue from clogging the internal flow channels. As the liquid flows upward, the heavy phase is gradually separated, and the purity of the light phase (degummed clear oil) gradually increases. The remaining impurities to be separated are mostly micro-particles or fine water droplets with extremely small particle sizes. At this point, the gradually decreasing gap between the discs at the top effectively shortens the settling distance of these tiny heavy phase particles, significantly improving the separation and retention efficiency, thereby maximizing the purity of the final overflow of refined clear oil.

[0033] The hydration reaction of the extracted mixed oil has strict temperature requirements (usually requiring heating to 65-80℃). For this reason, an annular heating tube is embedded in the wall of the mixing cylinder 3, and a heater is fixed externally to control the working state of the heating tube to maintain the optimal degumming temperature.

[0034] Example 2

[0035] refer to Figure 2-6 Based on Example 1, this embodiment focuses on detailing the hydration agent injection structure and the three-dimensional composite stirring structure inside the mixing cylinder 3.

[0036] In the hydration degumming process, the hydration solution (degumming water or phosphoric acid solution) added to the leached mixed oil needs to be dispersed extremely evenly to increase the contact area with the non-hydrated phospholipids in the oil. For this purpose, the mixing cylinder 3 of this device is equipped with a stirring assembly 4 and an auxiliary mechanism 5, and a drive mechanism 6, including a sleeve 61, a driven gear 62, a drive motor 63, and a driving gear 64, is mounted on the top. A protective mechanism (protective shell 7 and connecting cylinder 8) is also provided on the top wall of the mixing cylinder 3, fitted outside the drive mechanism 6.

[0037] A hollow drive shaft 65 is slidably mounted at the center of the driven gear 62. Several vertical limiting grooves 68 are evenly distributed on the outer wall of the drive shaft 65, and a corresponding toothed guide groove 69 is provided at the center of the driven gear 62, allowing the drive shaft 65 to rotate synchronously with the driven gear 62 while also possessing the freedom to slide axially. A hollow reciprocating screw 66 is fixed to the top of the drive shaft 65, and the reciprocating screw 66 is threadedly connected to a screw nut 67 fixed to the top wall of the protective shell 7. The top of the reciprocating screw 66 is connected to the external liquid inlet pipe 14 via a rotary joint 10. From this structure, it can be seen that when the drive motor 63 drives the gear, the reciprocating screw 66 is displaced vertically by the lifting reaction force of the screw nut 67, thereby forcibly driving the drive shaft 65 to perform a compound motion of "rotating while simultaneously reciprocating up and down."

[0038] The stirring assembly 4 includes a hollow main shaft 41, the top of which slides through the top wall of the mixing cylinder 3 and is fixed and connected to the bottom of the drive shaft 65. To maintain a slight positive pressure inside the cylinder, a piston plate 15 is rotatably mounted on the outer side of the top of the main shaft 41 via a sealed bearing, and the piston plate 15 slides against the sleeve 61. Several hollow fixed shafts 44 are symmetrically fixed to the side wall of the main shaft 41, the inner cavity of the fixed shaft 44 is connected to the inner cavity of the main shaft 41, and several nozzles 45 with one-way valves are installed on the side wall of the fixed shaft 44. The external hydration liquid enters the main shaft 41 through the inlet pipe 14 and the hollow drive shaft 65 and is sprayed out by the nozzles 45. With the lifting and rotating of the main shaft 41 throughout the cavity, the hydration liquid is atomized under high pressure and penetrates into each layer of the leached mixed oil in three dimensions, instantly completing large-area contact and significantly improving the hydration reaction rate.

[0039] To achieve high-intensity shear demulsification and agglomeration of the mixture, parallel connecting rods 42 are symmetrically mounted on the sidewall of the main shaft 41, with a vertical shaft 43 rotatably connected to the outer end of the connecting rods 42. Simultaneously, the auxiliary mechanism 5 includes a mounting ring 51 rotatably mounted in an annular groove on the top wall of the mixing cylinder 3 via a sealed bearing. The bottom wall of the mounting ring 51 has several radial limiting guide grooves 53, and a limiting slider 46 at the top of the vertical shaft 43 is slidably engaged within the limiting guide grooves 53. When the main shaft 41 reciprocates, the vertical limiting action of the mounting ring 51 causes the connecting rods 42 to fold and extend, forcing the vertical shaft 43 to perform a radial stretching and contracting cutting action in the horizontal plane while rotating with the main shaft. This effectively eliminates dead zones in the mixing chamber and promotes rapid agglomeration and flocculation of phospholipid particles.

[0040] In addition, scrapers 52 are symmetrically fixed on the outer side of the bottom wall of the mounting ring 51. Driven by the rotation of the limiting slider 46, the mounting ring 51 drives the scrapers 52 to rotate synchronously, and the scrapers 52 are always in contact with the inner wall edge of the mixing cylinder 3. This effectively removes the sticky hydrated phospholipids and other byproducts that are very easy to adhere to the cylinder wall during the heating process, preventing scaling while ensuring the heat conduction efficiency of the heating tube.

[0041] Example 3

[0042] This embodiment further describes in detail the complete workflow of the device when performing hydration degumming on leached mixed oils.

[0043] In operation, the phospholipid-containing leached mixed oil is first injected into the mixing cylinder 3 through the feed pipe 9, and at the same time the heater on the cylinder wall is turned on to raise the oil temperature to the set hydration reaction temperature (such as about 70°C) to reduce the viscosity of the oil and increase the hydrophilicity of the colloid.

[0044] The drive motor 63 located at the top of the mixing cylinder 3 is started, and through the master-slave gear pair and its internal spline groove, the reciprocating screw 66 is driven to link with the drive shaft 65. The external hydrated liquid is continuously pumped in through the inlet pipe 14, and the liquid is transported to the main shaft 41 through the internal hollow channel. Finally, it is evenly sprayed into the heated mixed oil from the nozzles 45 on the side walls of the fixed shaft 44 distributed in four places (the one-way valve on the nozzle prevents the oil from flowing back).

[0045] Meanwhile, the stirring assembly 4 performs complex spatial movements driven by the drive mechanism 6. The main shaft 41 and its nozzle 45 spirally rise and fall inside the cylinder, dynamically and three-dimensionally distributing the hydrated liquid to each liquid level layer. Accompanying the vertical relative displacement of the main shaft 41 with respect to the mounting ring 51, the connecting rod 42 pushes the vertical shaft 43 to extend and retract radially. The vertical shaft 43 performs all-round shearing and kneading of the oil-water mixture. At this time, the hydration reaction occurs violently. The gums in the oil absorb water and begin to expand and increase in mass, gradually condensing from Brownian motion into larger phospholipid flocs (i.e., hydration residue). Throughout the operation, the scraper 52 rotates synchronously with the mounting ring 51 to continuously scrape off the gum residue layer adhering to the surface of the heated cylinder wall.

[0046] After the mixture in mixing drum 3 is homogeneous and the reaction is kept at a constant temperature for the specified time, stirring is stopped, and the material valve 113 on the feed pipe 11 is immediately opened. Since there is no need for the long-pipe pump used in traditional processes, the free oil and flocs at high temperature sink under gravity, spiraling and buffering along the spiral feed channel 114, and are tangentially thrown into the bottom of the disc centrifuge 12 from the horizontal discharge port 115. The mixed liquid, after initial acceleration, enters the gap between the discs 13. Utilizing the disc assembly with gradually decreasing gaps from bottom to top, the large gap at the bottom layer achieves coarse separation and anti-clogging of the material, while the small gap at the top layer enables fine separation and purification of the liquid droplets, ensuring that colloidal particles at different climbing heights and particle sizes can obtain the most suitable separation and sedimentation conditions. Ultimately, the denser heavy phase (containing water, hydrated phospholipids, and other reactants) settles and is ejected from the machine from the bottom surface of the disc, while the lighter phase (refined degummed oil) gathers towards the center from the top surface of the disc and overflows upwards, completing the hydration and degumming of the leached mixed oil in one efficient operation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A refining apparatus for industrial-grade blended oils, characterized in that, include: The frame includes a base plate (1) and a mounting bracket (2), the mounting bracket (2) being fixed to the top wall of the base plate (1); Mixing cylinder (3), the mixing cylinder (3) is fixed on the top of the mounting frame (2), the mixing cylinder (3) is equipped with a stirring assembly (4) and an auxiliary mechanism (5), a feed pipe (9) with a valve is fixedly connected to one side of the top wall of the mixing cylinder (3), and a driving mechanism (6) for driving the stirring assembly (4) to rotate is installed in the middle of the top wall of the mixing cylinder (3). A protective mechanism is installed on the top wall of the mixing cylinder (3) and sleeved on the outside of the driving mechanism (6); The liquid inlet pipe (14) is connected at its bottom end to the top of the drive mechanism (6) via a rotary joint (10), and at its top end to an external water pump via a connecting pipe. Disc centrifuge (12), the disc centrifuge (12) is fixed on the top wall of the base plate (1), the top of the disc centrifuge (12) is fixed with a guide pipe (11) that communicates with the bottom of the inner cavity of the mixing cylinder (3), and a disc assembly is installed at the center of the inner cavity of the disc centrifuge (12).

2. The refining apparatus for industrial-grade blended oil according to claim 1, characterized in that, The stirring assembly (4) includes a hollow main shaft (41), the top end of which slides through the top wall of the mixing cylinder (3), and several sets of parallel connecting rods (42) are symmetrically mounted on the side wall of the main shaft (41), and several sets of hollow fixed shafts (44) are symmetrically fixed on the side wall of the main shaft (41). Each link (42) is rotatably connected to the same vertical shaft (43) at the end away from the main shaft (41). Limiting sliders (46) are fixed at the top of each vertical shaft (43). The inner cavity of the fixed shaft (44) is connected to the inner cavity of the main shaft (41), and a number of nozzles (45) with one-way valves are symmetrically installed on the side wall of the fixed shaft (44).

3. The refining apparatus for industrial-grade blended oil according to claim 2, characterized in that, The auxiliary mechanism (5) includes a mounting ring (51), and scrapers (52) are symmetrically fixed on the outer side of the bottom wall of the mounting ring (51). Several limiting guide grooves (53) are symmetrically opened on the bottom wall of the mounting ring (51). The scraper (52) is in contact with the inner wall of the mixing cylinder (3); The limiting slider (46) is slidably installed in the corresponding limiting guide groove (53).

4. The refining apparatus for industrial-grade blended oil according to claim 3, characterized in that, The top wall of the mixing cylinder (3) is provided with an annular through groove corresponding to the position of the mounting ring (51), and the mounting ring (51) is rotatably installed in the annular through groove through a sealed bearing.

5. The refining apparatus for industrial-grade blended oil according to claim 2, characterized in that, The drive mechanism (6) includes a sleeve (61) and a drive motor (63). The sleeve (61) is fixed at the center of the top wall of the mixing cylinder (3), and a driven gear (62) is rotatably mounted on the top of the sleeve (61). The drive motor (63) is fixed to one side of the top wall of the mixing drum (3), and a drive gear (64) is fixed on the power shaft at the top of the drive motor (63). The driven gear (62) meshes with the driving gear (64), and a hollow drive shaft (65) is slidably mounted at the center of the driven gear (62). The drive shaft (65) is fixed to the top end of the main shaft (41) and connected to the main shaft (41). A hollow reciprocating screw (66) is fixed to the top end of the drive shaft (65). The reciprocating lead screw (66) is connected to the drive shaft (65), and a matching lead screw nut (67) is installed on the reciprocating lead screw (66). The top end of the reciprocating lead screw (66) is connected to the liquid inlet pipe (14) through a rotary joint (10). The outer wall of the drive shaft (65) is provided with a plurality of limiting grooves (68), and the center of the driven gear (62) is provided with a toothed guide groove (69) that matches the outer wall of the drive shaft (65).

6. The refining apparatus for industrial-grade blended oil according to claim 5, characterized in that, The protective mechanism includes a protective shell (7) and a connecting cylinder (8). The protective shell (7) and the connecting cylinder (8) are integrally formed and fixed on the top wall of the mixing cylinder (3). The lead screw nut (67) is fixed at the center of the top wall of the protective shell (7).

7. The refining apparatus for industrial-grade blended oil according to claim 5, characterized in that, A piston plate (15) is rotatably mounted on the outer side of the top end of the main shaft (41) via a sealed bearing, and the piston plate (15) is slidably mounted inside the sleeve (61).

8. The refining apparatus for industrial-grade blended oil according to claim 1, characterized in that, The feed pipe (11) includes a pipe body (111), the top end of the pipe body (111) is fixed with a connector (112) that connects to the bottom of the inner cavity of the mixing cylinder (3), the top end of the pipe body (111) is fixed with a material valve (113), the bottom end of the pipe body (111) is symmetrically provided with a plurality of spiral feed channels (114), and the side wall and bottom wall of the pipe body (111) are provided with a horizontal discharge port (115) that communicates with the feed channels (114).

9. The refining apparatus for industrial-grade blended oil according to claim 1, characterized in that, The disc group includes several coaxially arranged discs (13), and the gap between adjacent discs (13) decreases from bottom to top.

10. The refining apparatus for industrial-grade blended oil according to claim 1, characterized in that, The mixing cylinder (3) has an annular heating tube embedded in its wall, and a heater for controlling the working state of the heating tube is fixed on the outside of the mixing cylinder (3).

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