Oil press for refining rice bran oil

Abstract

The invention discloses an oil press for refining rice bran oil. The oil press comprises a stirring barrel, a stirring assembly and a stirring driving device, wherein the stirring barrel is used for containing rice bran mixed pulp to be subjected to enzymolysis; the stirring assembly is arranged in the stirring barrel and is connected with a heating device; the rice bran pulp mixing device comprises a stirring assembly, a stirring barrel arranged in the stirring assembly, a heat conduction oil circulating cavity arranged in the stirring assembly and used for circularly conveying heat conduction oil, a jacket arranged on the outer side of the stirring barrel and used for circularly conveying temperature control liquid, a controller, a first temperature detection device arranged in the stirring barrel and used for detecting the rice bran pulp mixing temperature, and a second temperature detection device arranged in the stirring barrel and used for detecting the rice bran pulp mixing temperature, the controller adjusts the temperature of the stirring assembly based on the comparison result of the rice bran pulp mixing temperature detected by the first temperature detection device and the rice bran pulp mixing set temperature. According to the oil press for refining rice bran oil, uniform heating of the stirring barrel is achieved, and the temperature difference of rice bran pulp mixing in the stirring barrel is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rice bran oil processing, in particular to a rice bran oil expeller for refining. BACKGROUND

[0002] Rice bran oil is a kind of vegetable oil extracted from rice bran, a by-product of rice processing. It has attracted much attention in the fields of food, health products and cosmetics in recent years due to its rich nutritional components, high smoke point and mild flavor.

[0003] The current rice bran oil is extracted by the aqueous enzymatic method, which adopts a "constant temperature-stirring coupled enzymatic hydrolysis" mode: after the rice bran is slurried, it is put into an enzymatic hydrolysis kettle, which is heated at a constant temperature on one side, and the paddle rotates continuously at 50-200 rpm. The rotation of the paddle enables the cellulase, pectinase and protease to fully contact with the cell wall, rapidly degrading the cell wall and hydrolyzing the lipoprotein, and the released oil droplets collide and coalesce into large oil droplets under the action of mild shearing and constant temperature viscosity reduction. An obvious oil layer is formed after 1-4 hours of enzymatic hydrolysis, and the crude oil is obtained by centrifugal separation.

[0004] However, the current constant temperature-stirring coupled enzymatic hydrolysis mode still has a key technical bottleneck in actual application, i.e., uneven heating of the rice bran slurry. The existing heating mode of the enzymatic hydrolysis kettle is mainly bottom heating or side wall heating. Although the stirring device continuously circulates, there are inevitably stirring dead angles in the enzymatic hydrolysis kettle due to the structural design of the stirring device. The rice bran slurry in the stirring dead angle area remains in the same position for a long time and cannot be fully mixed with the slurry in other areas of the kettle, so that the heat generated by the heating device cannot be transferred to this area, resulting in a significant temperature difference between the rice bran slurries in different areas of the kettle, and the temperature in some areas deviates from the optimum reaction temperature of the enzyme. This uneven heating not only reduces the activity of the local enzyme, leading to insufficient enzymatic hydrolysis reaction and affecting the release and coalescence efficiency of the oil droplets, thereby causing fluctuations in oil yield, but also may cause local temperature to be too high, triggering side reactions such as denaturation of proteins and gelatinization of carbohydrates in rice bran, which not only increases the viscosity of the system and hinders the subsequent centrifugal separation operation, but also affects the quality of the crude oil, thereby restricting the further application of the aqueous enzymatic method in the large-scale production of rice bran oil.

[0005] Therefore, there is a need in the art to improve the existing rice bran oil screening device to solve the above technical problems. SUMMARY

[0006] The main purpose of the present application is to provide a rice bran oil expeller for refining, which can achieve uniform heating of the stirring barrel and reduce the temperature difference of the rice bran slurry in the stirring barrel during production.

[0007] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a rice bran oil refining expeller, comprising a stirring barrel for containing rice bran slurry to be enzymatically hydrolyzed, a stirring assembly arranged in the stirring barrel and connected with a heating device, a stirring driving device for driving the stirring assembly, a heat conducting oil circulation cavity arranged in the stirring assembly and used for circulating and transmitting heat conducting oil, and a jacket arranged outside the stirring barrel and used for circulating and transmitting temperature control liquid, and further comprising a controller, a first temperature detecting device arranged in the stirring barrel and used for detecting the temperature of the rice bran slurry, and the controller adjusts the temperature of the stirring assembly based on the comparison result of the temperature of the rice bran slurry detected by the first temperature detecting device and the set temperature of the rice bran slurry.

[0008] Optionally, the rice bran oil refining expeller further comprises a second temperature detecting unit for detecting the temperature of the barrel wall of the stirring barrel, and a circulating liquid temperature detecting unit arranged on the jacket, wherein the circulating liquid temperature detecting unit comprises an inlet liquid temperature detecting device arranged on the side of the jacket close to the inlet, and an outlet liquid temperature detecting device arranged on the side of the jacket close to the outlet.

[0009] Optionally, the rice bran oil refining expeller further comprises a second temperature detecting unit for detecting the temperature of the barrel wall of the stirring barrel, and a circulating liquid temperature detecting unit arranged on the jacket, wherein the circulating liquid temperature detecting unit comprises an inlet liquid temperature detecting device arranged on the side of the jacket close to the inlet, and an outlet liquid temperature detecting device arranged on the side of the jacket close to the outlet.

[0010] Optionally, the inlet liquid target temperature calculation formula is: ; : circulating liquid target inlet temperature : circulating liquid measured outlet temperature : circulating liquid measured inlet temperature : current temperature of the barrel wall of the stirring barrel : target temperature of the barrel wall of the stirring barrel

[0011] Optionally, the stirring assembly comprises a main stirring member accommodated in the stirring barrel, a side stirring member connected to one side of the main stirring member, and stirring blades arranged between the main stirring member and the side stirring member.

[0012] Optionally, the stirring blades are multiple and arranged in a spiral structure.

[0013] Optionally, the circulating transmission cavity comprises a first heat conduction oil cavity provided on the main stirring member for introducing heat conduction oil, a second heat conduction oil cavity provided on the side stirring member for discharging heat conduction oil, and a third heat conduction oil cavity provided in the stirring blade, the first heat conduction oil cavity, the second heat conduction oil cavity, and the third heat conduction oil cavity are in communication with each other, the driving end of the main stirring member and the driving end of the side stirring member are coaxially arranged, the first heat conduction oil cavity is provided with an oil inlet at one end of the driving end of the main stirring member, and the second heat conduction oil cavity is provided with an oil outlet at one end of the driving end of the side stirring member.

[0014] Optionally, the height of the liquid outlet of the jacket is greater than the height of the liquid inlet.

[0015] Optionally, the first temperature detection device is a plurality of first temperature detection devices arranged along the height direction of the stirring barrel.

[0016] Optionally, the second temperature detection unit is a plurality of second temperature detection units arranged on the side wall and the bottom wall of the stirring barrel.

[0017] The oil press for refining rice bran oil provided by the application has the following beneficial effects compared with the prior art: firstly, the stirring assembly is driven to rotate by the stirring driving device, the stirring assembly and the heating device are connected together, and the heat conduction oil is guided to circulate in the main stirring member and the side stirring member through the first through hole and the second through hole in the stirring assembly, the main stirring member and the side stirring member are used to heat the rice bran slurry to be enzymolyzed in the stirring barrel, so that the heating temperature of the rice bran slurry to be enzymolyzed is uniform.

[0018] Finally, the barrel wall temperature of the stirring barrel is detected by the second temperature detection unit, and the temperature of the inlet and outlet of the circulating liquid is detected by the circulating liquid temperature detection unit, the controller also calculates the target temperature of the inlet based on the comparison result of the barrel wall temperature of the stirring barrel detected by the second temperature detection unit and the set barrel wall temperature, and the temperature of the inlet and outlet of the circulating liquid in the circulating liquid temperature detection unit, and adjusts the temperature of the circulating liquid injected into the inlet on the jacket based on the calculated target temperature of the inlet, so as to avoid the influence of the barrel wall temperature of the stirring barrel on the temperature of the rice bran slurry in the stirring barrel. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The illustrative embodiments of the application, and their description, are presented to provide the best explanation of the application and its described embodiments. No limitation on the application is intended by the inclusion of the illustrative embodiments in the detailed description of the application and no one of or part of the detailed description nor the claims should be construed as a limitation on not including other embodiments of the application. Fig. 1 is a schematic diagram of the present application; Fig. 2 is a schematic diagram of the cross-sectional structure in the present application; Fig. 3 is a schematic diagram of the flow of the heat conducting oil and the circulating liquid in the present application.

[0020] wherein 1 is a stirring barrel, 2 is a stirring assembly, 21 is a main stirring piece, 22 is a side stirring piece, 23 is a stirring blade, 24 is a heat conducting oil circulating cavity, 241 is a first heat conducting oil cavity, 242 is a second heat conducting oil cavity, 243 is a third heat conducting oil cavity, 25 is a stirring blade, 26 is a blade channel, 3 is a stirring driving device, 4 is a jacket, 42 is a liquid inlet, 43 is a liquid outlet, 5 is a first temperature detection device, 6 is a second temperature detection unit, 7 is a circulating liquid temperature detection unit, 71 is a liquid inlet temperature detection device, 72 is a liquid outlet temperature detection device. DETAILED DESCRIPTION

[0021] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work should fall within the protection scope of the present application.

[0022] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0024] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0025] In addition, the meaning of the term "a plurality of" should be two and more than two.

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] As shown in Figs. 1-3 An oil press for refining rice bran oil, comprising a stirring barrel 1 for accommodating the enzyme hydrolysis rice bran slurry, a stirring assembly 2 provided in the stirring barrel 1 and connected to a heating device (not shown), a stirring drive device 3 for driving the stirring assembly 2, a heat transfer oil circulation cavity 24 provided in the stirring assembly 2 and used for circulating and transmitting heat transfer oil (not shown), and a jacket 4 provided outside the stirring barrel 1 and used for circulating and transmitting temperature control liquid, further comprising a controller (not shown), a first temperature detection device 5 provided in the stirring barrel 1 for detecting the temperature of the rice bran slurry, a second temperature detection unit 6 for detecting the temperature of the barrel wall of the stirring barrel 1, and a circulating liquid temperature detection unit 7 provided on the jacket 4.

[0028] The stirring barrel 1 is used for the enzyme hydrolysis rice bran slurry treatment process, and its function is to mix rice bran particles with the required enzyme hydrolysis solvent in a predetermined ratio, and to realize sufficient stirring between the rice bran particles and the enzyme hydrolysis solvent through the stirring assembly 2. The stirring barrel 1 is a prior art, which will not be described here.

[0029] The stirring assembly 2 comprises a main stirring part 21 accommodated in the stirring barrel 1, a side stirring part 22 connected to one side of the main stirring part 21, a first heat conducting oil cavity 241 formed in the main stirring part 21 for introducing heat conducting oil, a second heat conducting oil cavity 242 formed in the side stirring part 22 and communicating with the first heat conducting oil cavity 241, and stirring blades 23 arranged between the main stirring part 21 and the side stirring part 22, and a third heat conducting oil cavity 243 arranged in the stirring blades 23 and communicating the first heat conducting oil cavity 241 and the second heat conducting oil cavity 242.

[0030] The central axis of the main stirring part 21 coincides with the central axis of the stirring barrel 1, so that the main stirring part 21 rotates symmetrically in the stirring barrel 1, and the stirring blades 23 and the side stirring part 22 can uniformly cover the space in the stirring barrel 1, avoiding local dead angles caused by eccentricity.

[0031] The side stirring part 22 is a plurality of side stirring parts 22 distributed around the outside of the main stirring part 21, and the outer contour formed by the plurality of side stirring parts 22 is the same as the contour shape of the accommodation cavity in the stirring barrel 1, so that the side stirring part 22 is attached to the barrel wall in the stirring barrel 1 and rotates to ensure that the side stirring part 22 fully contacts the enzyme hydrolysis rice bran slurry in the stirring barrel 1 during rotation, so that the enzyme hydrolysis rice bran slurry is uniformly stirred.

[0032] The first end and the second end of each stirring blade 23 are respectively connected to the main stirring part 21 and the side stirring part 22, the stirring blades 23 are a plurality of stirring blades 23 arranged in a spiral structure, and the plurality of stirring blades 23 arranged in a spiral structure have axial propulsion and radial shear force between them, which can push the material to form three-dimensional convection of up-down circulation and circumferential flow, avoiding material stratification or local stagnation.

[0033] The heat conducting oil circulation cavity 24 comprises a first heat conducting oil cavity 241 formed in the main stirring part 21 for introducing heat conducting oil, a second heat conducting oil cavity 242 formed in the side stirring part for discharging heat conducting oil, and a third heat conducting oil cavity 243 arranged in the stirring blades.

[0034] The first heat-conducting oil cavity 241 is opened along the axial direction of the main stirring part 21, and the second heat-conducting oil cavity 242 is opened along the axial direction of the side stirring part 22. One end of the second heat-conducting oil cavity 242 in each side stirring part 22 is in communication with the first heat-conducting oil cavity 241, and the other end of the second heat-conducting oil cavity 242 is connected with the heat-conducting oil return end of the heating device. One end of the first heat-conducting oil cavity 241 is connected with the heat-conducting oil output end of the heating device, so as to realize the mutual transmission of the heat-conducting oil between the main stirring part 21 and the side stirring part 22. In addition, a third heat-conducting oil cavity 243 is arranged on the stirring blade 23, and the third heat-conducting oil cavity 243 is in communication with the first heat-conducting oil cavity 241 and the second heat-conducting oil cavity 242, so that the heat-conducting oil can flow into the stirring blade 23, so as to adjust the temperature of the stirring blade 23. The main stirring part 21, the side stirring part 22 and the stirring blade 23 are used for heating and stirring the rice bran to be enzymolysed in the stirring barrel 1 together, so as to make the temperature of the rice bran to be enzymolysed uniform in the stirring barrel 1. The heat-conducting oil is circulated and transmitted between the main stirring part 21 and the side stirring part 22. The heating device inputs the heat-conducting oil into the first heat-conducting oil cavity 241. The heat-conducting oil in the first heat-conducting oil cavity 241 is transmitted to the second heat-conducting oil cavity 242 in the side stirring part 22 and the third heat-conducting oil cavity 243 in the stirring blade 23, so as to realize the circulation and transmission of the heat-conducting oil between the main stirring part 21, the side stirring part 22 and the stirring blade 23.

[0035] The driving end of the main stirring part 21 is coaxially arranged with the driving end of the side stirring part 22. One end of the first heat-conducting oil cavity 241 towards the driving end of the main stirring part 21 is an oil inlet 244, and one end of the second heat-conducting oil cavity 242 towards the driving end of the side stirring part 22 is an oil outlet 245. That is, the first heat-conducting oil cavity 241 arranged on the driving end of the main stirring part 21 is coaxially arranged with the second heat-conducting oil cavity 242 arranged on the driving end of the side stirring part 22 and is arranged on the same side. That is, the driving end of the main stirring part 21 and the driving end of the side stirring part 22 are coaxially arranged in a sleeve structure. In this embodiment, the driving end of the side stirring part 22 is arranged outside the driving end of the main stirring part 21. The stirring driving device 3 is connected with the driving end of the side stirring part 22, so as to synchronously drive the rotation of the main stirring part 21. The connection structure between the stirring driving device 3 and the driving end of the side stirring part 22 is a prior art.

[0036] The stirring driving device 3 is used for connecting the free end side of the stirring assembly 2. The stirring driving device 3 and the stirring assembly 2 adopt any one of belt transmission structure, gear transmission structure and chain transmission structure. In the embodiment, the stirring driving device 3 is connected to the driving end of the side stirring piece 22, and the driving end of the main stirring piece 21 is coaxially arranged with the driving end of the side stirring piece 22. The main stirring piece 21 and the side stirring piece 22 are fixedly connected together, that is, the driving rotation between the stirring driving device 3 and the side stirring piece 22 is realized. In addition, the rotating joint is arranged between the stirring driving device 3 and the driving end of the main stirring piece 21 and the driving end of the side stirring piece 22, so as to ensure that the heating device is connected with the driving end of the main stirring piece 21 and the driving end of the side stirring piece 22 during the rotation of the driving end of the main stirring piece 21 and the driving end of the side stirring piece 22. The rotating joint is a kind of prior art, and the connection structure between the driving end of the main stirring piece 21, the driving end of the side stirring piece 22 and the heating device is a kind of prior art, which will not be described here.

[0037] The jacket 4 is fixedly connected to the outer side wall of the stirring barrel 1, and the jacket 4 and the stirring barrel 1 form a hollow cavity. The connection structure between the jacket 4 and the stirring barrel 1 is a kind of prior art, which will not be described here. The jacket 4 is provided with a liquid inlet 42 and a liquid outlet 43, which are connected with the circulating liquid temperature control transmission device. The liquid inlet 42 is used for injecting circulating liquid into the hollow cavity between the jacket 4 and the stirring barrel 1, and the liquid outlet 43 is used for discharging the circulating liquid in the hollow cavity. The height of the liquid outlet 43 is greater than that of the liquid inlet 42, so that the circulating liquid flows from bottom to top, so as to fully take away the temperature on the side wall of the stirring barrel 1.

[0038] The controller is a programmable controller (PLC). The controller is a kind of prior art, which is used for collecting the rice bran mixing temperature detected by the first temperature detection device 5, the temperature of the barrel wall of the stirring barrel detected by the second temperature detection unit 6, and the temperature of the circulating liquid detected by the circulating liquid temperature detection unit 7. The controller adjusts the temperature of the stirring assembly 2 based on the comparison result of the rice bran mixing temperature detected by the first temperature detection device 5 and the set temperature of the rice bran mixing. The controller also adjusts the temperature of the circulating liquid injected into the liquid inlet 42 of the jacket 4 based on the comparison result of the temperature of the barrel wall of the stirring barrel 1 detected by the second temperature detection unit 6 and the set temperature of the barrel wall of the stirring barrel 1, and the detection of the inlet and outlet liquid temperature of the circulating liquid in the circulating liquid temperature detection unit 7.

[0039] The first temperature detecting device 5 is used to detect the temperature of the rice bran slurry to be enzymolysed in the stirring barrel 1. In this embodiment, the first temperature detecting device 5 is arranged along the height direction of the stirring barrel 1, so that the plurality of first temperature detecting devices 5 respectively detect the temperature of the rice bran slurry to be enzymolysed at different heights in the stirring barrel 1. The plurality of first temperature detecting devices 5 transmit the temperature of the rice bran slurry to be enzymolysed to the controller and calculate the average temperature of the rice bran slurry to be enzymolysed by the controller, so as to obtain an accurate temperature of the rice bran slurry to be enzymolysed.

[0040] When the temperature of the rice bran slurry detected by the first temperature detecting device 5 is greater than the set temperature of the rice bran slurry, the controller calculates the difference between the detected temperature and the set temperature, and sends an adjustment signal to the heating device based on the calculation result, so as to reduce the temperature of the heat conducting oil output by the heating device to the stirring assembly 2. The heat is transferred to the rice bran slurry through the contact between the stirring assembly 2 and the rice bran slurry, so that the temperature of the slurry gradually decreases to the set temperature range, and the temperature is accurately adjusted. The control mode between the controller and the heating device is a prior art, which will not be described here.

[0041] The second temperature detecting unit 6 detects the temperature of the barrel wall of the stirring barrel 1. The plurality of second temperature detecting units are respectively arranged on the side wall and the bottom wall of the stirring barrel, so as to obtain the temperature of the barrel wall at different positions of the stirring barrel 1. The second temperature detecting units 6 transmit the temperature of the barrel wall at different positions of the stirring barrel 1 to the controller, and obtain the average temperature of the barrel wall of the stirring barrel 1, so as to ensure that the comparison result between the temperature detected by the second temperature detecting units 6 and the set temperature of the barrel wall of the stirring barrel 1 is accurate.

[0042] The circulating liquid temperature detecting unit 7 includes an inlet liquid temperature detecting device 71 arranged on one side of the jacket 4 close to the liquid inlet 42, and an outlet liquid temperature detecting device 72 arranged on one side of the jacket 4 close to the liquid outlet 43. The inlet liquid temperature detecting device 71 is used to detect the temperature of the circulating liquid injected through the liquid inlet 42, and the outlet liquid temperature detecting device 72 is used to detect the temperature of the circulating liquid flowing out through the liquid outlet 43. The inlet liquid temperature detecting device 71 and the outlet liquid temperature detecting device 72 are both prior arts, which will not be described here.

[0043] The controller also calculates the inlet port target temperature based on the comparison result of the temperature detected by the second temperature detecting unit 6 and the set temperature of the barrel wall of the stirring barrel 1 and the temperature of the inlet port 42 and the outlet port 43 of the circulating liquid in the circulating liquid temperature detecting unit 7, and adjusts the temperature of the circulating liquid injected into the inlet port 42 on the jacket 4 based on the calculated inlet port target temperature. When the temperature detected by the second temperature detecting unit 6 is greater than the set temperature of the barrel wall of the stirring barrel 1, the controller calculates the inlet port target temperature based on the temperature of the circulating liquid injected into the inlet port 42 detected by the second temperature detecting unit 6 and the temperature of the circulating liquid flowing out of the outlet port 43 detected by the circulating liquid temperature detecting unit 7.

[0044] wherein the inlet port target temperature calculation formula is: ; : the target inlet port temperature of the circulating liquid; : the measured outlet port temperature of the circulating liquid; : the measured inlet port temperature of the circulating liquid; : the current temperature of the barrel wall of the stirring barrel; : the target temperature of the barrel wall of the stirring barrel.

[0045] As can be seen from the formula, when is less than , the circulating liquid temperature control transmission device connected to the jacket 4 starts the cooling module, thereby reducing the temperature of the circulating liquid in the inlet port 42, and when is greater than , the heating module is started, thereby increasing the temperature of the circulating liquid in the inlet port 42. In addition, the calculated by the temperature correction coefficient K to avoid the temperature of the circulating liquid outlet changing due to the stirring assembly 2 still mechanically rotating after the temperature detection of the inlet and outlet of the circulating liquid temperature detection unit 7 is completed. The temperature correction coefficient K mainly considers the stirring speed and the barrel wall temperature difference. When the stirring speed is in the low speed interval, if the barrel wall temperature difference is a small temperature difference, the corresponding temperature correction coefficient K is 1.00; if the barrel wall temperature difference is a medium temperature difference, K is 1.03; and if the barrel wall temperature difference is a large temperature difference, K is 1.08. When the stirring speed is in the medium speed interval, if the barrel wall temperature difference is a small temperature difference, K is 1.02; if the barrel wall temperature difference is a medium temperature difference, K is 1.05; and if the barrel wall temperature difference is a large temperature difference, K is 1.10. When the stirring speed is in the high speed interval, if the barrel wall temperature difference is a small temperature difference, K is 1.05; if the barrel wall temperature difference is a medium temperature difference, K is 1.08; and if the barrel wall temperature difference is a large temperature difference, K is 1.12. The temperature correction coefficient K in all the above scenarios is controlled in the range of 0.95-1.15, so as to avoid the problem of temperature overshoot due to excessive correction.

[0046] The preferred embodiments of the present application have been described above by way of example only, not for limitation, and various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A screw press for refining rice bran oil, characterized by: The device for refining rice bran oil comprises a stirring barrel for containing rice bran slurry to be enzymatically hydrolyzed, a stirring assembly arranged in the stirring barrel and connected to a heating device, a stirring driving device for driving the stirring assembly, a heat conducting oil circulation cavity arranged in the stirring assembly and used for circulating and transferring heat conducting oil, and a jacket arranged outside the stirring barrel and used for circulating and transferring temperature control liquid.

2. A screw press for refining rice bran oil as claimed in claim 1, wherein: The oil press for refining rice bran oil further comprises a second temperature detection unit for detecting the temperature of the barrel wall of the stirring barrel, and a circulating liquid temperature detection unit arranged on the jacket, which comprises an inlet liquid temperature detection device arranged near the inlet of the jacket and an outlet liquid temperature detection device arranged near the outlet of the jacket.

3. A screw press for refining rice bran oil as claimed in claim 2, wherein: The controller further calculates the target temperature of the inlet liquid based on the comparison result of the temperature of the barrel wall of the stirring barrel detected by the second temperature detection unit and the set temperature of the barrel wall of the stirring barrel, and the temperature of the inlet and outlet of the circulating liquid in the circulating liquid temperature detection unit, and adjusts the temperature of the circulating liquid injected into the inlet of the jacket based on the calculated target temperature of the inlet liquid.

4. A screw press for refining rice bran oil as claimed in claim 3, wherein: The formula for calculating the target temperature of the inlet liquid is as follows: ； : target inlet temperature of the circulating fluid : measured outlet temperature of the circulating liquid : measured temperature of liquid inlet; : current temperature of the bowl wall; : target temperature of the bowl wall.

5. A screw press for refining rice bran oil as claimed in claim 1 further characterized by: The stirring assembly comprises a main stirring member accommodated in the stirring barrel, a side stirring member connected to one side of the main stirring member, and stirring blades arranged between the main stirring member and the side stirring member.

6. A screw press for refining rice bran oil as claimed in claim 5, wherein: The stirring blades are arranged in a spiral structure.

7. A screw press for refining rice bran oil as claimed in claim 5, wherein: The circulation cavity comprises a first heat conducting oil cavity opened on the main stirring member and used for introducing heat conducting oil, a second heat conducting oil cavity opened on the side stirring member and used for discharging heat conducting oil, and a third heat conducting oil cavity arranged in the stirring blades, wherein the first heat conducting oil cavity, the second heat conducting oil cavity, and the third heat conducting oil cavity are in communication with each other, the driving end of the main stirring member and the driving end of the side stirring member are arranged concentrically, the first heat conducting oil cavity has an oil inlet at one end of the driving end of the main stirring member, and the second heat conducting oil cavity has an oil outlet at one end of the driving end of the side stirring member.

8. A screw press for refining rice bran oil as claimed in claim 1, wherein: The height of the outlet of the jacket is greater than the height of the inlet.

9. A screw press for refining rice bran oil as claimed in claim 1, wherein: The first temperature detection devices are arranged along the height direction of the stirring barrel.

10. A screw press for refining rice bran oil as claimed in claim 1, wherein: The second temperature detection units are arranged on the side wall and the bottom wall of the stirring barrel.

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