Rice bran oil processing and leaching process and system

Abstract

The invention belongs to the technical field of grease refining and refining, and particularly relates to a rice bran oil processing and leaching process and system which comprises a leacher, and the leacher comprises main equipment, material grids, a spraying device, an oil collecting tank, a waste discharging tank and a driving device; the partition frames are connected into the material grids in a sliding mode through springs, and the partition frames are evenly and vertically distributed; when the partition plates are in the horizontal state, the partition plates form a closed state, rice bran is blocked, the flow speed of a solvent penetrating through the partition plates is reduced, the flow speed of the solvent is increased, and the situation that the oil extraction effect is reduced due to too high flow speed of the solvent and insufficient contact of the solvent and the rice bran caused by too high air permeability in the rice bran in the material grid is avoided; for example, due to the fact that the partition plate is closed, a layer of solvent flows slowly and accumulates on the top, contact between the rice bran and the solvent is facilitated, and the leaching effect is improved; in addition, the fresh solvent is injected, the old solvent gradually flows down, and subsequent injection of the fresh solvent is not affected in the mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil refining and refining, and specifically relates to a leaching process and system for rice bran oil processing. Background Art

[0002] Rice bran oil is a nutritious vegetable oil, and the absorption rate after ingestion is more than 90%; the fatty acid composition, vitamin E, sterols, oryzanol, etc. in rice bran oil are beneficial to human absorption, and have beneficial effects such as removing cholesterol in the blood, reducing blood lipids, and promoting human growth and development; the leaching process of rice bran oil includes steps such as pretreatment, leaching, evaporation and stripping, and solvent recovery; among them, a commonly used leaching device is a horizontal rotary leaching device; after rice bran enters the horizontal rotary leaching device, it is in full contact with the leaching solvent, and under certain temperature and time conditions, the oil in the rice bran is extracted by the solvent to form mixed oil and discharged. However, if the horizontal rotary leaching device is fed, the rice bran is unevenly distributed in each cell, some cells are overfilled with rice bran, and some are underfilled; then in the overfilled cells, due to the large bulk density of the rice bran and the large resistance to solvent penetration, the contact between the solvent and the rice bran during the leaching process is not sufficient, resulting in incomplete leaching of some oil, and the amount of mixed oil remaining in the wet meal will be relatively large; while in the underfilled cells, although the contact area between the rice bran and the solvent is large, due to the small amount of material, the overall amount of oil leached is small, and the amount of mixed oil in the wet meal is relatively small; uneven material distribution will cause uneven leaching effects, reduce the overall oil leaching rate, and may also lead to inconsistent wet meal quality in different cells, bringing difficulties to subsequent wet meal treatment. Moreover, uneven distribution will compact the material layer, reduce the air permeability, slow down the penetration speed of the solvent in the material layer, hinder the leaching process, and more mixed oil will remain in the wet meal; while the material layer formed by rice bran with larger particle size or lower humidity has good air permeability, smooth solvent penetration, good leaching effect, and relatively low mixed oil content in the wet meal; the difference in air permeability of the material layer will lead to different leaching speeds, affect production efficiency, and also cause unstable wet meal quality, which has an adverse impact on subsequent processing. Summary of the Invention

[0003] In order to make up for the deficiencies of the prior art and solve the above technical problems; the present invention proposes a leaching process and system for rice bran oil processing.

[0004] The technical solution adopted by the present invention to solve its technical problems is: the present invention proposes a leaching process and system for rice bran oil processing, including a leaching device, which includes a main device, cells, a spraying device, an oil collecting tank, a waste discharging tank, and a driving device; further including: A partition box, the partition box is slidably connected to the storage compartment through a spring, and the partition boxes are evenly distributed vertically. A partition plate is rotatably connected to the inside of the partition box through a torsion spring. A plurality of partition plates are arranged side by side in each partition box, and infusion holes are evenly opened on the partition plate; the inner wall of the storage compartment is evenly provided with infusion pipes, and the part of the infusion pipe located inside the storage compartment is communicated with the inside of the partition plate and the partition box. A lifting device is provided at the top of the main device to drive the spraying device to descend and connect with the top opening of the infusion pipe; A sealing cover, the sealing cover is located inside the partition box, and one end of the cylinder of the partition plate rotates inside the sealing cover. A driving component is arranged inside the sealing cover to connect and drive the partition plates with each other; a waste plate is slidably connected inside the waste discharge groove, and the waste plate is connected to a first electric push rod installed inside the waste discharge groove; recovery holes are evenly opened on the inner wall of the waste discharge groove, and one-way valves are arranged inside the recovery holes; an electric push door and a detection box are respectively arranged at the bottom of the waste discharge groove, and the detection box is communicated with the recovery holes. The electric push door is located on one side of the detection box to close the waste discharge groove.

[0005] Preferably, an arc-shaped extrusion ring is provided on the inner wall of the top of the main device, and the top of the infusion pipe is the serrated surface at the bottom of the extrusion ring. The port of the extrusion ring is far from the lower part of the spraying device, and the infusion pipes on both sides of the partition box are lifted and lowered synchronously; the cross-section of the periphery of the partition box is trapezoidal, the surface of the partition box in contact with the inner wall of the storage compartment is larger than the surface far from the storage compartment, and the top and bottom surfaces of the partition box are inclined surfaces; filter oil holes are evenly provided on the inner wall surface of the storage compartment, and the filter oil holes are in contact with the outer wall of the partition box. When the partition box is stationary, the partition box blocks the filter oil holes; filter meshes are arranged inside the filter oil holes.

[0006] Preferably, the holes in the filter mesh are arranged vertically. A dredging rod is slidably connected to the infusion pipe through a spring, and the brush provided at the end of the dredging rod extends into the holes in the filter mesh.

[0007] Preferably, a filter frame is provided inside the storage compartment, a filter cloth is installed on the filter frame, and the filter frame is close to the bottom of the storage compartment.

[0008] Preferably, a pressure filter plate is provided at the bottom of the infusion pipe, and pressure filter holes are evenly opened on the pressure filter plate. A sealing plug is slidably connected inside the pressure filter hole, and a fixing rod is provided at the bottom of the sealing plug and fixed on the inner wall of the storage compartment.

[0009] Preferably, a cap is hinged to the top of the infusion pipe through a torsion spring. The cap is used to block the top opening of the infusion pipe, and a ball is provided on the top of the cap.

[0010] Preferably, a sealing plate is opened on the outer periphery of the device main body, and a sampling box is provided on the sealing plate. The sampling box is located between the filter cloth and the bottom of the storage compartment, and the sampling box is communicated with the storage compartment.

[0011] Preferably, a detection plate is slidably connected inside the detection box. The detection plate is connected to a second electric push rod installed on the detection box. A discharge pipe is provided inside the detection box, and a one-way valve is provided inside the discharge pipe. A sensor is provided inside the detection box.

[0012] Preferably, a weighing plate is provided at the top of the electric push door, and a weighing device is provided between the weighing plate and the electric push door.

[0013] A leaching process for rice bran oil processing, the steps of this leaching process include: S1: Pretreatment Using a vibrating screen device to remove rice husks, broken rice, and sand impurities from the rice bran; then, using a fluidized bed dryer device to adjust the moisture content of the rice bran to an appropriate range; next, using a rollermill to roll the dried rice bran into thin flakes; S2: Leaching Put the pretreated rice bran into a leaching apparatus, add a selected solvent, and under preset temperature and time conditions, the solvent and the rice bran are in full contact, and the oil is dissolved into the solvent to form a mixed oil; after leaching is completed, the mixed oil and the solid residue are separated through a draining device; S3: Evaporation and stripping Send the drained mixed oil into an evaporator, evaporate the solvent by heating to obtain crude oil; then, strip the crude oil through a stripping column, and use steam to remove the residual solvent to ensure that the solvent residue in the crude oil meets the national standard; S4: Solvent recovery The solvent gas volatilized during the leaching process is cooled by a condenser, condensed into a liquid, and recycled; the recycled solvent is regenerated by distillation to ensure the purity of the solvent and the leaching effect.

[0014] The beneficial effects of the present invention are as follows: 1. For the leaching process and system for rice bran oil processing of the present invention, when the partition plates are in a horizontal state, they form a closed state with each other, blocking the rice bran while reducing the flow rate of the solvent passing through the partition plates, extending the flow rate of the solvent, and preventing the internal air permeability of the rice bran in the material cell from being too large, which may cause the solvent flow rate to be too fast and the two not to be in full contact, resulting in a reduction in the oil extraction effect. For example: due to the closure of the partition plates, a layer of solvent with a slow flow rate can accumulate on the top, which helps the contact between the rice bran and the solvent and improves the leaching effect; moreover, when fresh solvent is injected and the old solvent gradually flows down, this method does not affect the injection of subsequent fresh solvent.

[0015] 2. In the leaching process and system for rice bran oil according to the present invention, after the wet meal enters the waste discharge tank, the first electric push rod starts to drive the waste plate to move. The movement of the waste plate cooperates with the inner wall of the waste discharge tank to squeeze the wet meal, and the wet meal is squeezed into the enclosed space in the waste discharge tank. The waste plate continuously squeezes the wet meal, and the mixed oil remaining in the wet meal is extruded. Since the enclosed space in the waste discharge tank is reduced due to the extrusion of the waste plate, the mixed oil is extruded into the inside of the detection box through the recovery hole while being extruded. The detection box conducts quality detection on the mixed oil remaining in the wet meal, and workers assist in judging the leaching effect based on the detection results, which is convenient for workers to modify the leaching work, thereby improving the leaching effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is the internal structure diagram of the present invention; Figure 2 is the perspective view of the upper half of the main equipment; Figure 3 is the state diagram of rice bran wet meal being discharged into the waste discharge tank; Figure 4 is the state diagram of the material grid discharging mixed oil; Figure 5 is the schematic diagram of the driving component driving the partition plate to rotate; Figure 6 is the cross-sectional view of the side of the material grid; Figure 7 is Figure 6 the cross-sectional view at A - A in Figure 8 is the top view of the lower half of the main equipment; Figure 9 is the semi - cross - sectional view of the waste discharge tank; In the figure: main equipment 1, material grid 11, spraying device 12, oil collecting tank 13, waste discharge tank 14, partition frame 15, partition plate 16, infusion hole 17, infusion pipe 18, lifting device 19, sealing cover 2, driving component 21, waste plate 22, first electric push rod 23, recovery hole 24, electric push door 25, detection box 26, extrusion ring 27, oil filtering hole 28, filter screen 29, dredging rod 3, filter frame 31, filter cloth 32, pressure filter plate 33, pressure filtering hole 34, sealing plug 35, fixed rod 36, cap 37, ball 38, sealing plate 4, sampling box 41, detection plate 42, second electric push rod 43, discharge pipe 44, weighing plate 45. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0019] Embodiment 1: To effectively solve the above problems, as shown in the accompanying drawings of the specification Figures 1-9 it includes a pretreatment unit, a leaching unit, a filtering unit, a wet meal treatment unit, and a solvent recovery unit; The rice bran oil leaching system is divided into a pretreatment unit, a leaching unit, a mixed oil treatment unit, a wet meal treatment unit, and a solvent recovery unit; for example: Pretreatment unit Raw material cleaning module: Remove impurities in the rice bran through equipment such as vibrating screens and magnetic separators to prevent impurities from entering subsequent equipment and causing equipment wear or blockage; Drying and conditioning module: Use equipment such as dryers to adjust the moisture and temperature of the rice bran to make it reach a suitable state for leaching; the moisture of the rice bran is controlled at 8%-12%, and the temperature is controlled at 40-60°C, which is beneficial to improving the leaching effect and the quality of subsequent products; Leaching unit Leaching machine module: After the rice bran enters the leaching machine, it comes into full contact with the solvent. Under certain temperature and time conditions, the oil in the rice bran is extracted by the solvent to form mixed oil; Solvent circulation module: The solvent pump transports the solvent from the solvent storage tank to the leaching machine for leaching reaction with the rice bran; the leached mixed oil and the remaining solvent flow back to the solvent storage tank through pipelines to form a solvent circulation; during the circulation process, impurities in the solvent are removed through filters to ensure the purity of the solvent; Filtering unit Filtering module: Use filtering equipment such as plate and frame filter presses to filter the mixed oil to remove solid impurities such as fine rice bran powder in it and improve the quality of the mixed oil; Evaporation module: Heat and evaporate the filtered mixed oil through an evaporator to volatilize the solvent and separate it from the oil, further removing the residual solvent in the mixed oil to obtain crude oil; Wet meal treatment unit Desolventizing module: The wet meal after leaching contains a large amount of solvent and needs to be desolventized; use a steam stripper to volatilize the solvent in the wet meal by introducing steam to achieve the separation of the solvent and the meal; Drying and cooling module: Use a dryer and a cooler to reduce the moisture of the meal and lower the temperature to normal temperature to prevent the meal from mildewing and deteriorating during storage; Solvent recovery unit Solvent condensation module: The solvent vapor volatilized from the mixed oil evaporation and wet meal desolventization processes is cooled by a condenser to condense it into a liquid solvent; Solvent storage module: After the recovered solvent is separated from the water in it by a separator, it is stored in a solvent storage tank for recycling in the leaching unit; The leaching unit includes a leacher, and the leacher includes main equipment 1, a charging grid 11, a spraying device 12, an oil sump 13, a waste discharge tank 14, and a driving device; it also includes: A partition frame 15, the partition frame 15 is slidably connected to the inside of the charging grid 11 through a spring, and the partition frames 15 are evenly vertically distributed. A partition plate 16 is rotatably connected to the inside of the partition frame 15 through a torsion spring. A plurality of partition plates 16 are arranged side by side in each partition frame 15, and liquid infusion holes 17 are evenly opened on the partition plate 16; the inner wall of the charging grid 11 is evenly provided with a liquid infusion pipe 18, and the part of the liquid infusion pipe 18 located inside the charging grid 11 is communicated with the inside of the partition plate 16 and the partition frame 15. A lifting device 19 is provided at the top of the main equipment 1 to drive the spraying device 12 to descend and connect with the top opening of the liquid infusion pipe 18; A sealing cover 2, the sealing cover 2 is located inside the partition frame 15, and one end of the cylinder of the partition plate 16 rotates inside the sealing cover 2. A driving assembly 21 is provided inside the sealing cover 2 to connect and drive the partition plates 16 with each other; a waste plate 22 is slidably connected inside the waste discharge tank 14, and the waste plate 22 is connected to a first electric push rod 23 installed inside the waste discharge tank 14; the inner wall of the waste discharge tank 14 is evenly provided with recovery holes 24, and one-way valves are provided inside the recovery holes 24; an electric push door 25 and a detection box 26 are respectively provided at the bottom of the waste discharge tank 14, and the detection box 26 is communicated with the recovery holes 24, and the electric push door 25 is located on one side of the detection box 26 to close the waste discharge tank 14; The main equipment 1, the charging grid 11, the spraying device 12, the oil sump 13, the waste discharge tank 14, and the driving device are conventional components of the leacher, and the lifting device 19 is an electric lifter used to drive the spray nozzle in the spraying device 12 to lift and lower; the driving assembly 21 is an integrated device of a conventional motor and a transmission belt. For example: the motor drives the transmission belt to rotate, and the transmission belt connects the end parts of each partition plate 16 extending into the sealing cover 2 and drives the partition plate 16 to rotate. The space where the driving assembly 21 drives the partition plate 16 is sealed by the sealing cover 2 to prevent the solvent from contacting the components used for transmission and causing pollution; the middle part of the partition plate 16 is located inside the frame of the partition frame 15, and both ends pass through the inner walls on both sides of the partition frame 15 and the side wall of the sealing cover 2 and are located between one side of the sealing cover 2 and the inner wall of the partition frame 15. One end of the partition plate 16 is communicated with the hollow inside of the partition frame 15, so that the solvent can be evenly transported into the inside of the partition plate 16 through the partition frame 15 and sprayed into the raw materials through the liquid infusion holes 17; Specific working process: The pre-treated rice bran is fed into the cell 11 of the horizontal rotary extractor through the feeding device of the conventional configuration of the extractor. At this time, the driving component 21 drives the partition plate 16 to rotate to the vertical state, and the partition plate 16 does not block the rice bran from descending and accumulating in the cell 11. Until the fixed amount of rice bran is put into the cell 11, the driving component 21 then drives the partition plate 16 to rotate to the horizontal state. At this time, the horizontal partition plate 16 and the partition frame 15 form a closed partition, so that multiple partition spaces are formed inside the cell 11 through the intervention of the partition frame 15; the amount of rice bran in the partition space decreases, reducing the backlog of rice bran and resulting in insufficient air permeability at the bottom, causing the solvent fluidity to decrease. Thus, the air permeability of the rice bran in the cell 11 is improved, the contact effect between the solvent flow and the rice bran is improved, and the extraction effect is further improved; The rice bran rotates in the cell 11 driven by the driving device. When the material moves to the lower part of the spraying device 12 along with the cell 11, at this time, the top opening of the infusion pipe 18 is aligned with the spraying port at the bottom of the spraying device 12, and the lifting device 19 drives the spraying device 12 to descend and communicate with the top opening of the infusion pipe 18. While the spraying device 12 conveys the solvent to the infusion pipe 18, it also sprays the solvent onto the rice bran at the top of the cell 11; the solvent inside the infusion pipe 18 is sprayed out from the infusion holes 17 through the inside of the partition frame 15 and the inside of the partition plate 16, cooperating with the function of separating the rice bran; On the one hand, the improvement of air permeability enables the rice bran in the cell 11 to contact the rice bran simultaneously and evenly, avoiding the situation that the time for the solvent to flow down from the top of the cell 11 is too long, resulting in differences in the contact time between the rice bran at different parts in the cell 11 and the solvent, and causing the situation that some oils are not effectively extracted; On the other hand, when the partition plate 16 is in the horizontal state, it forms a closed state with each other. While blocking the rice bran, it reduces the flow rate of the solvent passing through the partition plate 16, extends the solvent flow rate, and avoids the excessive air permeability inside the rice bran in the cell 11, resulting in too fast a solvent flow rate and insufficient contact between the two, causing the reduction of the oil extraction effect. For example: due to the closure of the partition plate 16, a layer of solvent can accumulate slowly at the top, which helps the contact between the rice bran and the solvent and improves the extraction effect; moreover, when fresh solvent is injected and the old solvent gradually flows down, this method does not affect the injection of subsequent fresh solvent; furthermore, workers can also adjust the closing degree of the partition plate 16 by adjusting the rotation of the partition plate 16 to an angle close to the horizontal, so as to achieve the purpose of adjusting the solvent fluidity; As the horizontal rotary extractor rotates slowly, the material in the cell 11 contacts the solvent, and the oil is gradually dissolved by the solvent and diffused into the solvent to form mixed oil; after a period of extraction, most of the oil in the material has been extracted by the solvent. The mixed oil in the cell 11 enters the draining part of the extractor and is gradually drained. The mixed oil in the cell 11 enters the oil collecting tank 13 for collection, and the mixed oil content in the material decreases to form wet meal; Subsequently, the material cell 11 rotates and enters above the waste discharge groove 14. The driving assembly 21 drives the partition plate 16 to rotate to a vertical state. The partition plate 16 no longer blocks the wet meal, and the wet meal falls through the partition frame 15 and the partition plate 16 into the waste discharge groove 14. Since there is still a small amount of mixed oil in the wet meal, this mixed oil can act as a lubricant during the falling process of the wet meal, reducing the friction between the wet meal and the parts and reducing the residual amount of the wet meal in the material cell 11; After the wet meal enters the waste discharge groove 14, the first electric push rod 23 starts to drive the waste plate 22 to move. The waste plate 22 moves and cooperates with the inner wall of the waste discharge groove 14 to squeeze the wet meal, squeezing the wet meal into the enclosed space in the waste discharge groove 14. The waste plate 22 continuously squeezes the wet meal, and the residual mixed oil in the wet meal is squeezed out. Since the enclosed space in the waste discharge groove 14 is reduced due to the squeezing of the waste plate 22, when the mixed oil is squeezed out, it is squeezed into the inside of the detection box 26 through the recovery hole 24. The detection box 26 conducts quality detection on the residual mixed oil in the wet meal, for example: The solvent does not contact the material sufficiently: If the oil content in the mixed oil is low while the oil content extruded from the wet meal is high, it may be that the solvent did not contact the material sufficiently during the leaching process, resulting in some oil not being effectively extracted; Insufficient leaching time: If the leaching time is too short, the oil cannot be fully transferred from the material to the solvent, which will cause the oil content in the mixed oil to be lower than expected and the residual oil rate in the wet meal to be on the high side; Workers assist in judging the leaching effect based on the detection results, which is convenient for workers to modify the leaching work, thereby improving the leaching effect; moreover, most of the residual mixed oil in the wet meal can be recovered, reducing the subsequent treatment intensity of the wet meal; After the wet meal is squeezed, the first electric push rod 23 drives the waste plate 22 to reset, the electric door 25 opens, and the squeezed wet meal is discharged and recovered from the bottom of the waste discharge groove 14.

[0020] Embodiment 2: On the basis of Embodiment 1, an arc-shaped extrusion ring 27 is provided on the inner wall of the top of the main device 1, and the top of the infusion pipe 18 is against the serrated surface at the bottom of the extrusion ring 27. The port of the extrusion ring 27 is far from the lower part of the spraying device 12, and the infusion pipes 18 on both sides of the partition frame 15 are lifted and lowered synchronously; the cross-section of the four edges of the partition frame 15 is trapezoidal, the surface of the partition frame 15 in contact with the inner wall of the material cell 11 is larger than the surface far from the material cell 11, and the top and bottom surfaces of the partition frame 15 are inclined planes; the inner wall surface of the material cell 11 is evenly provided with oil filtering holes 28, and the oil filtering holes 28 are in contact with the outer wall of the partition frame 15. When the partition frame 15 is stationary, the partition frame 15 blocks the oil filtering holes 28; a filter screen 29 is provided in the oil filtering holes 28; The holes in the filter screen 29 are arranged vertically. A dredging rod 3 is slidably connected to the infusion pipe 18 through a spring, and the brush provided at the end of the dredging rod 3 extends into the holes in the filter screen 29; The material grid 11 is provided with a filter frame 31, a filter cloth 32 is installed on the filter frame 31, and the filter frame 31 is close to the bottom of the material grid 11; The partition frame 15 is connected to the infusion tube 18, and the connection portion of the two penetrates the side wall of the material grid 11, and the penetration portion can move up and down in the lifting groove formed on the side wall of the material grid 11, and sealing rings are installed on the top and bottom of the partition frame 15 to seal the gap between the partition frame 15 and the side wall of the material grid 11 to prevent the rice bran from leaking from the connection into the interior of the material grid 11; Specific working process: when the driving device drives the material grid 11 to rotate, the material grid 11 drives the infusion tube 18 to rotate. After the infusion tube 18 passes over the spray device 12, the top of the infusion tube 18 contacts the serrated surface at the bottom of the extrusion ring 27, so that the infusion tube 18 is squeezed downward and descends, and the infusion tube 18 drives the partition frame 15 and the partition plate 16 to descend, driving a small amount of rice bran in the separation space to move downward; after the infusion tube 18 moves to the serrated tooth tip of the extrusion ring 27, the infusion tube 18 is no longer squeezed, and the partition frame 15 is affected by the spring to drive the partition plate 16 and the infusion tube 18 to rise rapidly, and the partition plate 16 drives the rice bran in the separation space to rise and move, and the partition frame 15 scrapes and cleans the rice bran adhered to the inner wall of the material grid 11, and by driving the rice bran to move up and down, the movement effect of the rice bran is increased, and the contact between the rice bran and the solvent is promoted, while the inner wall of the material grid 11 is cleaned, and the formation of rice bran lumps on the inner wall of the material grid 11 is avoided, which affects the leaching work; When the infusion tube 18 rises, it collides with the serrated depression of the extrusion ring 27, and the partition frame 15 and the partition plate 16 drive the rice bran to vibrate due to the collision, so that the rice bran in the partition space is scattered, and the rice bran in the partition space is turned over by vibration, so that the position of the rice bran changes, the rice bran that fully contacts the solvent moves away from the solvent, and the rice bran that does not contact enough moves close to the solvent, thereby promoting the contact effect between the rice bran and the solvent and improving the leaching effect of the rice bran oil; and, in conjunction with the detection box 26, the mixed oil test result squeezed out of the wet meal is used to assist the workers in determining the leaching degree of the rice bran oil, thereby improving the convenience of use; After the grease in the material grid 11 is extracted, it flows together with the solvent. However, if it flows from top to bottom, the path that the grease needs to flow is complicated and long, which easily leads to poor grease discharge or drainage effect. Therefore, by providing the oil filter hole 28 and the filter screen 29, the grease or solvent extracted in each separated space flows into the hollow interior of the material grid 11 through the filter screen 29, and flows downward into the oil collecting tank 13 for collection or circulation, thereby improving the grease drainage effect and accelerating the circulation efficiency of the solvent. Furthermore, since the partition frame 15 has a trapezoidal cross section, a layer of solvent is formed on the top of the partition plate 16. Solvent or grease exceeding this thickness will overflow through the filter 29 and flow into the material grid 11, thereby maintaining the solvent extraction effect while ensuring the fluidity of the solvent and the circulation efficiency of the solvent. When the infusion tube 18 moves up and down, the infusion tube 18 drives the dredging rod 3 to move up and down. The brush provided at the end of the dredging rod 3 slides into the oil filtering hole 28 and descends along the vertical meshes of the oil filtering hole 28 to wash and dredge the filter screen 29, maintaining the filtering capacity of the filter screen 29 and reducing the impact of blockage; By providing the filter frame 31, the solution after the solvent and grease are mixed and flowing out of the storage bin 11 is filtered by the filter cloth 32 in the filter frame 31, filtering the rice bran impurities in the solution, improving the cleanliness, reducing the pressure of filtering impurities during the solution circulation process, and improving the solution circulation efficiency; moreover, when the worker installs the filter frame 31, a maintenance door can be opened on the side wall of the storage bin 11 and the main device 1. The worker can directly remove the filter frame 31 and the filter cloth 32 by opening the maintenance door, which is convenient for replacement and improves the practicability.

[0021] Embodiment 3: On the basis of Embodiment 2, a pressure filter plate 33 is provided at the bottom of the infusion tube 18, and pressure filter holes 34 are uniformly opened on the pressure filter plate 33. A sealing plug 35 is slidably connected in the pressure filter holes 34. A fixing rod 36 is provided at the bottom of the sealing plug 35, and the fixing rod 36 is fixed on the inner wall of the storage bin 11; The top of the infusion tube 18 is hinged with a cap 37 through a torsion spring. The cap 37 is used to block the top opening of the infusion tube 18, and a ball 38 is provided on the top of the cap 37; A sealing plate 4 is opened on the outer periphery of the equipment main body, and a sampling box 41 is provided on the sealing plate 4. The sampling box 41 is located between the filter cloth 32 and the bottom of the storage bin 11, and the sampling box 41 is communicated with the storage bin 11; Specific working process: When the infusion tube 18 descends, it drives the pressure filter plate 33 to descend. When the pressure filter tube descends, the sealing plug 35 is inserted into the pressure filter hole 34, and the pressure filter hole 34 is sealed. The pressure filter plate 33 squeezes the solution between the pressure filter plate 33 and the filter frame 31 downward, accelerating the flow and filtration of the solution and improving the filtration efficiency of the solution; when the infusion tube 18 drives the pressure filter plate 33 to rise, since the sealing plug 35 is fixed due to the influence of the fixing rod 36, the rising of the pressure filter plate 33 causes the sealing plug 35 to move away from the pressure filter hole 34, and the solution flowing down from the oil filtering hole 28 passes through the pressure filter hole 34 through the pressure filter plate 33 and flows onto the filter cloth 32; When the infusion tube 18 is close to the spraying device 12, it is far from the extrusion ring 27. Affected by the torsion spring, the cap 37 flips open the top opening of the infusion tube 18. When the infusion tube 18 is far from the spraying device 12, it is close to the extrusion ring 27. One end of the extrusion ring 27 presses on the cap 37, causing the cap 37 to flip back to its original position in the reverse direction. The cap 37 reseals the top opening of the infusion tube 18 to prevent the inside of the infusion tube 18 from being contaminated. Moreover, the cap 37 is in rolling contact with the serrated bottom of the extrusion ring 27 through the ball 38, reducing friction and preventing debris generated by friction from affecting the cleanliness of the rice bran. Also, when the infusion tube 18 descends, the partition frame 15 is kept rising and falling in a horizontal state to prevent the partition frame 15 from tilting during the rising and falling process, resulting in blocked movement. By providing the sampling box 41, and the sampling boxes 41 are annularly distributed in the oil sump 13, workers can mark each sealing plate 4. For example, the first sealing plate 4 and the sampling box 41 are for the initial stage of leaching, the second sealing plate 4 and the sampling box 41 are for the middle stage of leaching, and the third sealing plate 4 and the sampling box 41 are for the final stage of leaching. Workers take samples of the solution samples at multiple leaching stages for testing, determine the oil leaching effect at each stage, and combine the detection of the residual mixed oil in the wet meal in the detection box 26 and the leaching adjustment in the bin 11, which is convenient for workers to grasp the oil leaching effect of the rice bran in real time and improve the practicability of the leaching system. For example: Accurately judge the leaching effect In the initial stage of leaching, the first sealing plate 4 and the sampling box 41 collect solution samples. At this time, testing the samples can understand the oil leaching speed and the initial leaching amount when the rice bran first contacts the solvent. In the middle stage of leaching, the second sealing plate 4 and the sampling box 41 are sampled and tested to know the progress of oil leaching during the leaching process and judge whether the leaching is proceeding as expected. By the final stage of leaching, the sample testing of the third sealing plate 4 and the sampling box 41 can clarify whether the oil in the rice bran has been extracted as much as possible. Effect: By detecting the solution samples at different stages, the dynamic changes of oil leaching can be accurately grasped. For example, if it is found that the oil leaching speed is too slow in the initial stage of leaching, it may be that the solvent spraying is uneven or the material pretreatment effect is not good, and the spraying device 12 can be adjusted in time or the material pretreatment link can be checked. If the leaching effect in the middle stage does not meet the expectation, the influencing factors such as temperature, the ratio of solvent to material, etc. can be analyzed, and then targeted adjustments can be made. The detection in the final stage of leaching can judge whether the leaching is complete. If there is too much residual oil, measures such as extending the leaching time or increasing the solvent dosage can be taken to improve the oil extraction rate and ensure the product quality. Adjust the leaching parameters in time Combined with the detection of residual mixed oil in wet rice bran in the detection box 26, the situation of remaining oil and solvent in wet rice bran after leaching can be understood; at the same time, observe the leaching state in the material grid 11, such as the turning situation of the material, the penetration situation of the solvent, etc.; according to these detection and observation results, adjust the parameters in the leaching process, such as solvent flow rate, leaching temperature, stirring speed, etc.; Effect: This combined detection and adjustment method can keep the leaching process in the best state all the time; for example, if the content of residual mixed oil in wet rice bran is relatively high, it may be that the solvent flow rate is insufficient and the oil cannot be fully dissolved and carried away. At this time, the solvent flow rate can be increased to make the solvent fully contact with rice bran and improve the oil leaching effect; if it is found that the material in the material grid 11 is not turned sufficiently, resulting in uneven solvent penetration, the stirring speed or the angle of the paddle can be adjusted to improve the mixing degree of the material and the solvent, ensure the uniformity of leaching, thereby improving the overall leaching efficiency and reducing energy consumption and production costs; Optimize the overall production process By sampling and detecting and parameter adjusting at each stage, accumulate production data, and analyze the characteristics and laws of rice bran leaching in different batches; according to these data, optimize the entire leaching process flow, including the operating parameters of the equipment, the processing method of the material, etc.; Effect: It helps to optimize the overall production process; for example, through the analysis of data from multiple batches, it is found that a certain rice bran raw material has better leaching effect under specific pretreatment conditions, and this pretreatment condition can be fixed to improve the stability of production and the consistency of product quality; at the same time, according to the data feedback in the leaching process, targeted maintenance and improvement can also be carried out on the equipment, such as adjusting the position of the sealing plate 4 or optimizing the design of the sampling box 41 to make the equipment more adaptable to production requirements and improve production efficiency; Example 4: On the basis of Example 3, a detection plate 42 is slidably connected in the detection box 26. The detection plate 42 is connected to a second electric push rod 43 installed on the detection box 26. A discharge pipe 44 is provided in the detection box 26, and a one-way valve is provided in the discharge pipe 44. A sensor is provided in the detection box 26; A weighing plate 45 is provided at the top of the electric push door 25, and a weighing device is provided between the weighing plate 45 and the electric push door 25; Specific working process: When the wet meal is subjected to extrusion, the second electric push rod 43 starts to drive the detection plate 42 to move away from the discharge pipe 44. The internal space in the detection box 26 near the recovery hole 24 and the discharge pipe 44 forms a negative pressure. Since there is a conventional one-way valve in the discharge pipe 44, the discharge pipe 44 cannot supply air from the outside to the detection box 26, causing the detection box 26 to suck the squeezed mixed oil into the waste discharge tank 14 through the recovery hole 24. With the extrusion effect of the waste plate 22, the flow rate of the mixed oil entering the detection box 26 is increased, improving the detection efficiency. When the waste plate 22 resets and moves away from the recovery hole 24, the detection box 26 completes the detection of the mixed oil through a conventional sensor for detecting the composition of the mixed oil. The detection plate 42 presses down to squeeze the mixed oil into the oil collection tank 13 for recovery. Moreover, a net for filtering the wet meal can be provided at one end of the recovery hole 24 close to the waste discharge tank 14 to filter the mixed oil extruded from the wet meal. Additionally, an air blowing pipe can be arranged on the side of the net away from the wet meal. There is a one-way valve in the air blowing pipe. When the waste plate 22 squeezes the wet meal, the air blowing pipe is closed. When the waste plate 22 moves away from the wet meal after extrusion, a negative pressure state is formed in the closed space in the waste discharge tank 14 for a short time. The air blowing pipe located on the side of the net blows air into the waste discharge tank 14 to blow away the wet meal filtered on the net, maintaining the filtering ability. After the wet meal is extruded, the first electric push rod 23 resets, and the wet meal is naturally placed on the weighing plate 45 on the top of the electric push door 25. The extruded wet meal is weighed by a conventional weighing device, and the amount of mixed oil extruded into the detection box 26 is detected. Thus, the weight of the wet meal in each bin 11 and the residual amount of mixed oil in the wet meal can be obtained. Taking these parameters as a comparison, the component changes in the mixed oil when the same kind of wet meal is processed can be analyzed, assisting the workers to adjust the leaching process in a timely manner, thereby improving the practicality.

[0022] Embodiment Five: A rice bran oil processing and leaching process, the steps of which include: S1: Pretreatment Using a vibrating screen device to remove husks, broken rice, and sand impurities in the rice bran; then, using a fluidized bed dryer device to adjust the moisture content of the rice bran to an appropriate range; next, using a rollermill to roll the dried rice bran into thin flakes. S2: Leaching Put the pretreated rice bran into a leaching apparatus, add a selected solvent, and under preset temperature and time conditions, the solvent and the rice bran are in full contact, and the oil is dissolved into the solvent to form mixed oil. After leaching is completed, the mixed oil and the solid residue are separated through a draining device. S3: Evaporation and Stripping Send the drained mixed oil into an evaporator, evaporate the solvent by heating to obtain crude oil; then, carry out stripping on the crude oil through a stripping column, and use steam to remove the residual solvent to ensure that the solvent residue in the crude oil meets the national standard. S4: Solvent Recovery The solvent gas volatilized during the leaching process is cooled by a condenser, condensed into a liquid, and recycled; the recovered solvent is regenerated by distillation to ensure the purity of the solvent and the leaching effect.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rice bran oil processing and leaching system, comprising an extractor, wherein the extractor comprises a main device (1), a material grid (11), a spray device (12), an oil collecting tank (13), a waste discharge tank (14) and a driving device; characterized in that: Also includes: A partition frame (15), wherein the partition frame (15) is slidably connected to the material grid (11) through a spring, and the partition frames (15) are evenly distributed vertically. A partition plate (16) is rotatably connected to the partition frame (15) through a torsion spring. A plurality of partition plates (16) are arranged side by side in each partition frame (15), and infusion holes (17) are evenly provided on the partition plates (16); infusion tubes (18) are evenly provided in the inner wall of the material grid (11), and the part of the infusion tube (18) located in the material grid (11) is connected to the interior of the partition plate (16) and the partition frame (15); a lifting device (19) is provided on the top of the main device (1) to drive the spray device (12) to descend and connect to the top opening of the infusion tube (18); A sealing cover (2), wherein the sealing cover (2) is located in a partition frame (15), and one end of a cylindrical partition plate (16) rotates in the sealing cover (2), and a driving assembly (21) is provided in the sealing cover (2) to connect the partition plates (16) to each other for transmission; a waste plate (22) is slidably connected in the waste discharge groove (14), and the waste plate (22) is connected to a No. 1 electric push rod (23) installed in the waste discharge groove (14); recovery holes (24) are evenly opened on the inner wall of the waste discharge groove (14), and a one-way valve is provided in the recovery hole (24); an electric push door (25) and a detection box (26) are respectively provided at the bottom of the waste discharge groove (14), and the detection box (26) and the recovery hole (24) are connected, and the electric push door (25) is located on one side of the detection box (26) to close the waste discharge groove (14).

2. A rice bran oil processing and leaching system according to claim 1, characterized in that: The top inner wall of the main device (1) is provided with an arc-shaped extrusion ring (27), and the bottom of the extrusion ring (27) at the top of the infusion tube (18) is a serrated surface, the port of the extrusion ring (27) is far away from the bottom of the spray device (12), and the infusion tubes (18) on both sides of the partition frame (15) are raised and lowered synchronously; the edge cross-sections of the partition frame (15) are trapezoidal, the surface of the partition frame (15) contacting the inner wall of the material grid (11) is larger than the surface away from the material grid (11), and the top and bottom surfaces of the partition frame (15) are inclined surfaces; the inner wall surface of the material grid (11) is evenly provided with oil filter holes (28), and the oil filter holes (28) contact the outer wall of the partition frame (15), and when the partition frame (15) is stationary, the partition frame (15) blocks the oil filter holes (28); a filter screen (29) is provided in the oil filter holes (28).

3. A rice bran oil processing and leaching system according to claim 2, characterized in that: The holes in the filter screen (29) are arranged vertically, a dredging rod (3) is slidably connected to the infusion tube (18) via a spring, and a brush arranged at the end of the dredging rod (3) extends into the holes in the filter screen (29).

4. A rice bran oil processing and leaching system according to claim 2, characterized in that: A filter frame (31) is arranged in the material grid (11), a filter cloth (32) is installed on the filter frame (31), and the filter frame (31) is close to the bottom of the material grid (11).

5. A rice bran oil processing and leaching system according to claim 4, characterized in that: A filter press plate (33) is provided at the bottom of the liquid infusion tube (18), and filter press holes (34) are evenly opened on the filter press plate (33). A sealing plug (35) is slidably connected in the filter press hole (34). A fixing rod (36) is provided at the bottom of the sealing plug (35), and the fixing rod (36) is fixed on the inner wall of the material grid (11).

6. A rice bran oil processing and leaching system according to claim 5, characterized in that: A cap (37) is hingedly connected to the top of the infusion tube (18) via a torsion spring. The cap (37) is used to seal the top opening of the infusion tube (18), and a ball (38) is provided on the top of the cap (37).

7. A rice bran oil processing and leaching system according to claim 5, characterized in that: A sealing plate (4) is provided on the outer periphery of the main body of the device, and a sampling box (41) is provided on the sealing plate (4); the sampling box (41) is located between the filter cloth (32) and the bottom of the material grid (11); and the sampling box (41) and the material grid (11) are in communication.

8. A rice bran oil processing and leaching system according to claim 1, characterized in that: A detection plate (42) is slidably connected in the detection box (26), and the detection plate (42) is connected to a second electric push rod (43) installed on the detection box (26). A discharge pipe (44) is provided in the detection box (26), and a one-way valve is provided in the discharge pipe (44). A sensor is provided in the detection box (26).

9. A rice bran oil processing and leaching system according to claim 1, characterized in that: A weighing plate (45) is provided on the top of the electric push door (25), and a weighing device is provided between the weighing plate (45) and the electric push door (25).

10. A rice bran oil processing and leaching process, characterized in that, The rice bran oil processing and leaching process is applicable to the rice bran oil processing and leaching system described in any one of claims 1 to 9, and the leaching process steps include: S1: Preprocessing The rice husk, broken rice, sand and gravel impurities in the rice bran are removed by a vibrating screen device; then, the moisture content of the rice bran is adjusted to a suitable range by a fluidized bed dryer; then, the dried rice bran is rolled into thin sheets by a flaking machine; S2: Leaching The pretreated rice bran is placed in an extractor, and a selected solvent is added. Under the preset temperature and time conditions, the solvent is fully in contact with the rice bran, and the oil is dissolved in the solvent to form a mixed oil; after the leaching is completed, the mixed oil is separated from the solid residue by a draining device; S3: Evaporation and stripping The mixed oil obtained by draining is sent to the evaporator, and the solvent is evaporated by heating to obtain crude oil; then, the crude oil is stripped by a stripping tower, and the residual solvent is removed by water vapor to ensure that the residual solvent content in the crude oil meets the national standards; S4: Solvent Recovery The volatilized solvent gas during the leaching process is cooled by a condenser, condensed into liquid, and recycled; the recovered solvent is regenerated by distillation to ensure the purity of the solvent and the leaching effect.

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