Stirring method

Abstract

The invention relates to the field of stirring, in particular to a stirring method which is carried out through a stirring bin, the stirring bin comprises a stirring bin body, a driving assembly and an auger, and the auger comprises a first stirring shaft, a second stirring shaft, a first spiral blade, a second spiral blade and a connecting plate which are arranged in parallel; the stirring method comprises the following steps: S1, a preheating stage; s2, a water adding stage; s3, an oil extraction stage; s4, a purification stage; s5, an oil drainage stage; and S6, a deslagging stage. According to the stirring method, water in the stirring bin body can be almost completely absorbed by oil residues, liquid in the stirring bin body is almost free of water except oil liquid, the extracted oil has the extremely high purity rate, the prepared oil does not need to be refined and can be directly filled for use, and the production cost is reduced. The nutritional oil is high-end nutritional oil which can be directly eaten, and the oil extraction rate and the oil extraction efficiency are relatively high.

Description

Technical Field

[0001] The present application relates to the field of stirring, and in particular to a stirring method. Background Art

[0002] Water replacement is a traditional oil production technology. It mainly uses the difference in the "affinity" of non-oil components (protein and carbohydrates) in oil to oil and water, as well as the different densities of oil and water to separate oil and protein at the same time. This technology is mainly used in the production of sesame oil. Through operations such as mixing oil with water, shaking oil, and stabilizing oil, gravity is used to make wet sesame residue sink and oil float. The whole process takes 8 to 12 hours. This method can also be used to extract oils such as walnuts, tea oil, and peanuts. However, due to the complex oil extraction process, low oil extraction efficiency, and the formation of a large amount of wastewater after oil extraction, there is currently a lack of relevant equipment, resulting in few applications in production. The production process usually involves grinding the oil, adding a certain amount of hot water to the mixing and stirring equipment for stirring and oscillating. During the stirring and oscillating process, water will replace the oil in the oil. Finally, the replaced oil and oil residue are separated to obtain vegetable oil.

[0003] For example, a Chinese patent with the announcement number CN116836753A discloses a device for extracting oil by water substitution, which includes a stirring chamber, in which a first stirring shaft and a second stirring shaft are rotatably installed and arranged in parallel, a first spiral blade is fixedly connected to the first stirring shaft, and a second spiral blade is fixedly connected to the second stirring shaft; a rotating motor is also fixedly installed outside one end of the stirring chamber, and the rotating motor controls the first stirring shaft and the second stirring shaft to rotate synchronously through a synchronous gear and a synchronous belt. When the stirring chamber is used, oil and water are added to the stirring chamber in turn, and the first stirring shaft and the second stirring shaft are controlled to rotate by the rotating motor to achieve stirring of the materials in the stirring chamber, the protein in the oil is emulsified in the stirring chamber, and the water will replace the oil in the oil. With stirring, the viscosity of the material becomes larger and larger, and gradually sticks together into a mass. Finally, the replaced oil and the agglomerated oil residue are separated to obtain vegetable oil. However, as the viscosity of the material increases, the resistance encountered by the first spiral blade and the second spiral blade increases. On the one hand, this increases the load on the rotating motor and reduces its service life. On the other hand, it is inconvenient for the first spiral blade and the second spiral blade to tear, squeeze, and knead the emulsified protein mass with high adhesion, affecting the oil yield. Summary of the invention

[0004] In order to reduce the load of the rotating motor and increase the service life of the rotating motor, and at the same time facilitate the first spiral blade and the second spiral blade to tear, squeeze and knead the emulsified protein mass with high adhesion to improve the oil yield, the present application provides a stirring method.

[0005] A stirring method provided in the present application adopts the following technical solution: A stirring method is performed by a stirring chamber, wherein the stirring chamber comprises a stirring chamber body, a driving assembly and an agitator; The auger includes a first stirring shaft and a second stirring shaft arranged in parallel, the first stirring shaft is provided with a first spiral blade, the second stirring shaft is provided with a second spiral blade, the inner sides of the first spiral blade and the second spiral blade are fixedly connected to a plurality of connecting plates, the first spiral blade is fixedly connected to the first stirring shaft via the connecting plate to form a hollow structure, and the second spiral blade is also fixedly connected to the second stirring shaft via the connecting plate to form a hollow structure.

[0006] By adopting the above technical solution, for the special oil production method of the present application, the first spiral blade and the second spiral blade are hollow. As the viscosity of the material increases, the material can pass through the first spiral blade and the second spiral blade in addition to the outside, and can also pass through the inside of the first spiral blade and the second spiral blade. The advantages are as follows: (1) Reduce stirring resistance, reduce the load of the rotating motor, and increase the service life of the rotating motor; (2) It is easier to tear, squeeze, knead, and rub the emulsified protein mass with high adhesion, thereby improving the oil yield; (3) Reduce the dead angle between the spiral blade and the shaft, making it easier to clean.

[0007] Optionally, the agitator is arranged in the mixing chamber body; the two ends of the first agitator shaft are rotatably connected to the two opposite side walls of the mixing chamber body, and the two ends of the second agitator shaft are rotatably connected to the two side walls of the mixing chamber body; the driving assembly is used to drive the first agitator shaft and the second agitator shaft to rotate; the mixing chamber is provided with a heating device and a heating automatic water injection device, and the heating automatic water injection device is provided with a rotating nozzle, and the rotating nozzle is arranged toward the mixing chamber body.

[0008] By adopting the above-mentioned technical scheme, when the mixing bin of the present application is in use, the material, i.e., oil, is added to the mixing bin body, the oil in the mixing bin is heated to a specified temperature by a heating device, and then a specified temperature and a certain amount of water is added to the mixing bin body by a heating automatic water injection device. Through the setting of the rotating nozzle, the water can cover the entire mixing bin in a fan shape in the form of spray, so as to achieve rapid and uniform addition of water, so that the powder can quickly and evenly absorb water, thereby quickly emulsifying, oiling, and agglomerating, thereby improving the oil yield.

[0009] After the water is added, the temperature inside the mixing chamber body continues to maintain the specified temperature, and then the first mixing shaft and the second mixing shaft are driven to rotate by the driving assembly, and the first mixing shaft and the second mixing shaft continuously change the mixing mode. The oil in the mixing chamber body continuously changes the movement direction with the first spiral blade and the second spiral blade, the oil is emulsified, the oil is released and agglomerated; the oil and the oil, the oil and the inner wall of the mixing chamber body, and the oil and the first spiral blade and the second spiral blade continuously form a state of tearing, kneading, and squeezing.

[0010] Since the temperature and humidity of the protein in the oil have reached the optimal emulsification conditions, the oil is repeatedly torn, rubbed, and squeezed through stirring. The protein in the oil will gradually emulsify. After emulsification, the protein has a high hydrophilic and oleophobic property. Therefore, during the emulsification process, the oil protein will gradually release the oil contained in it. As the emulsification degree increases, the oil released by the oil will also increase. At the same time, after the protein releases the oil, the oil content itself will decrease, the viscosity will increase, and the oil residue will stick together into a ball, like a smooth dough.

[0011] When the oil is completely released into the mixing chamber, the emulsified protein has high water absorption and high viscosity, and the agglomerated oil residue is continuously stirred. The agglomerated protein is constantly rolled left and right in the oil, the purpose is to adhere the residual particles or small pieces of oil residue in the oil to the oil residue, and absorb the residual water in the oil more thoroughly, so as to obtain a clearer and purer oil.

[0012] The driving assembly includes a first reduction motor and a second reduction motor, wherein the rotating shaft of the first reduction motor is fixedly connected to the first stirring shaft, and the rotating shaft of the second reduction motor is fixedly connected to the second stirring shaft.

[0013] By adopting the above technical solution, the first reduction motor and the second reduction motor respectively control the rotation of the first stirring shaft and the second stirring shaft, and various stirring forms can be achieved: The oil circulates clockwise: when the first reduction motor and the second reduction motor both rotate counterclockwise, the oil will be driven by the first spiral blade and the second spiral blade and circulate in the mixing chamber body in a clockwise direction.

[0014] The oil circulates counterclockwise: when the first reduction motor and the second reduction motor both rotate clockwise, the oil will be driven by the first spiral blade and the second spiral blade to circulate counterclockwise in the mixing chamber body.

[0015] The oil flows to the left (away from the first reduction motor): When the first reduction motor rotates counterclockwise and the second reduction motor rotates clockwise, the oil will be driven by the first spiral blade and the second spiral blade to move to the left.

[0016] Oil flows to the right (towards the direction close to the first reduction motor): when the first reduction motor rotates clockwise and the second reduction motor rotates counterclockwise, the oil will be driven to the right by the first spiral blade and the second spiral blade.

[0017] The bottom wall of the stirring chamber body is arranged in an arc shape to form two unit chambers, and the first stirring shaft and the second stirring shaft are respectively located in the two unit chambers.

[0018] By adopting the above technical solution, it is divided into two unit bins, which is helpful to realize oil partitioning, and the oil in the mixing bin body is orderly carried out in accordance with different mixing forms, such as clockwise circulation: when the first reduction motor and the second reduction motor rotate counterclockwise, the oil will be driven by the first spiral blade and the second spiral blade to circulate in a clockwise direction. During the circulation process, the oil on both sides moves in the two unit bins, and the unit bin is replaced at the end of the mixing bin body to form a cycle. The arc-shaped bottom wall of the unit bin can provide a better force-bearing surface for the oil in the mixing bin body, which helps the oil to form agglomerates, and ultimately helps to improve the oil yield and efficiency.

[0019] The side walls at both ends of the unit bin are respectively provided with an oil residue outlet and an oil liquid outlet, and the oil residue outlet and the oil liquid outlet are arranged near the lowest point of the side wall of the unit bin; A slag discharge drive mechanism and an oil discharge drive mechanism are arranged outside the mixing bin body; an oil slag baffle is movably arranged at the oil slag outlet through the oil slag drive assembly, and the oil slag baffle is used to block or open the oil slag outlet; an oil liquid baffle is movably arranged at the oil liquid outlet through the oil discharge drive mechanism, and the oil liquid baffle is used to block or open the oil liquid outlet; The bottom wall of the stirring chamber body is arranged obliquely, and the lowest end of the bottom wall of the stirring chamber body is located at the oil outlet.

[0020] By adopting the above technical solution, after the oil in the mixing chamber becomes clearer and purer, the oil and slag are discharged in sequence: When draining the oil: after the first stirring shaft and the second stirring shaft run to push the oil residue mass to one end of the stirring bin close to the oil residue baffle, the first stirring shaft and the second stirring shaft stop rotating, and the oil baffle moves to open the oil outlet to drain the oil; since the stirring bin as a whole is inclined toward the direction of the oil outlet, the oil will flow out through the oil outlet in the inclined direction.

[0021] Then the first stirring shaft and the second stirring shaft rotate in opposite directions, so that the oil residue mass moves toward the oil outlet, but does not move to the oil outlet, and then the rotation direction of the first stirring shaft and the second stirring shaft is changed to push the oil residue mass to the end of the stirring bin close to the oil residue baffle, and the first stirring shaft and the second stirring shaft stop rotating for a period of time to perform secondary oil release; the secondary oil release step is repeated many times until the oil release is completed. In order to avoid the formation of grooves between the oil residue mass and the spiral blades, which may prevent the oil from flowing out, the secondary oil release step will be repeated many times during the oil release process to change the posture and angle of the oil residue mass and improve the adequacy of oil release.

[0022] During slag discharge: after the oil is discharged, the slag is discharged. The first stirring shaft and the second stirring shaft rotate to push the oil residue mass toward the oil liquid outlet, but not to the oil liquid outlet; then change the rotation direction of the first stirring shaft and the second stirring shaft to push the oil residue mass toward the oil residue outlet; repeat the above steps several times to make the oil residue fragments in the mixing bin adhere to the oil residue mass as much as possible; then the oil residue baffle moves until the oil residue outlet is opened, and the first stirring shaft and the second stirring shaft rotate to push the oil residue mass out of the oil residue outlet to complete the slag discharge.

[0023] In order to more thoroughly distinguish between oil and oil residue, the oil liquid outlet and the oil residue outlet are independently set at the left and right ends of the mixing chamber body. After the entire mixing chamber body is installed, the mixing chamber body is tilted in the direction of oil outlet, which facilitates the oil to flow out smoothly from the oil outlet to achieve solid-liquid separation.

[0024] Optionally, a fixing plate is fixedly arranged on the outer side wall of the mixing chamber body on which the oil outlet is opened, and the oil outlet passes through the fixing plate; The oil discharge drive mechanism includes a first telescopic cylinder, a synchronization plate and a connecting rod. The tail end of the first telescopic cylinder is fixedly mounted on the fixed plate, the output end of the first telescopic cylinder is fixedly connected to the middle of the synchronization plate, the connecting rod is fixedly connected to both ends of the synchronization plate, and the end of the connecting rod away from the synchronization plate is correspondingly connected to the oil baffle.

[0025] By adopting the above technical solution, when the oil outlet needs to be opened, the first telescopic cylinder is started, the piston rod of the first telescopic cylinder is extended, driving the synchronous plate to move in the direction away from the mixing bin body, and then driving the oil baffle to move in the direction away from the oil outlet through the connecting rod, so as to open the oil outlet; when the oil outlet needs to be closed, the piston rod of the first telescopic cylinder is shortened to reset. The operation is simple and convenient, and the oil discharge drive mechanism is integrally arranged at the end of the mixing bin body, with a compact structure and small installation space and activity space.

[0026] Optionally, an oil guide box is fixedly installed on the fixed plate, the oil outlet is arranged in a one-to-one correspondence with the oil guide box, the oil outlet passes through the side wall of the oil guide box close to the stirring chamber body, the bottom of the oil guide box is arranged in a cone shape, the oil baffle is arranged in the oil guide box, and the connecting rod passes through the side wall of the oil guide box away from the stirring chamber body and is connected to the oil baffle.

[0027] By adopting the above technical solution, the setting of the oil guide box, on the one hand, helps to guide the oil to fall to the designated position; on the other hand, it can limit the telescopic path of the connecting rod, improve the stability of the telescopic connection of the connecting rod, and then improve the stability of the movement of the oil baffle, making it easier for the oil baffle to accurately open and close the oil outlet.

[0028] Optionally, an extended guide cylinder is fixedly installed on the side wall of the oil guide box away from the mixing chamber body, and the extended guide cylinder penetrates the side wall of the oil guide box away from the mixing chamber body, and the connecting rod passes through the extended guide cylinder.

[0029] By adopting the above technical solution, the setting of lengthening the guide cylinder can increase the limiting length of the connecting rod, thereby further improving the stability of the telescopic extension of the connecting rod, and further improving the stability of the movement of the oil baffle.

[0030] Optionally, the slag discharge driving mechanism includes a second telescopic cylinder, a mounting bracket, a mounting rod and a swing rod, the mounting bracket and the mounting rod are fixedly mounted on the outer side wall of the mixing bin body away from the oil outlet, and the mounting bracket, the mounting rod and the oil residue baffle are arranged in sequence from top to bottom; The tail end of the second telescopic cylinder is hinged on the mounting bracket, and the output end of the second telescopic cylinder is hinged on the oil residue baffle; The swing rod is rotatably connected to the two ends of the mounting rod, and one end of the swing rod away from the mounting rod is fixedly connected to the oil residue baffle.

[0031] By adopting the above technical solution, when the oil residue outlet needs to be opened for slag discharge, the second telescopic cylinder is started, the piston rod of the second telescopic cylinder is shortened, and then the swing rod and the oil residue baffle are driven to rotate to realize the opening of the oil residue outlet; when the oil residue outlet needs to be closed, the second telescopic cylinder is extended to reset, the operation is simple and convenient, and the slag discharge drive mechanism is integrally arranged at the end of the mixing bin body, the structure is compact and the installation space and activity space occupied are small. The slag discharge drive mechanism adopts a different structure from the oil discharge drive mechanism because the oil residue has weaker fluidity and is in a clumping shape compared to the oil liquid, so a larger outlet is required. The structure of the oil discharge drive mechanism is not suitable for slag discharge, so drive structures suitable for oil discharge and slag discharge are respectively set.

[0032] A stirring method comprises the following steps: S1, preheating stage: after the material completely enters the mixing bin, the heating device is started to control the temperature in the mixing bin to 65-72°C, and at the same time, the first mixing shaft and the second mixing shaft rotate around their own axes, pushing the powder in clockwise and counterclockwise cycles alternately; When the material reaches the water adding condition, that is, the material is evenly heated to 65-72℃, it automatically enters the water adding stage; S2, water adding stage: after the water adding conditions are met, the rotation direction of the first stirring shaft and the second stirring shaft is changed, and the material is pushed in a counterclockwise cycle continuously; the heating automatic water injection device automatically operates, and after the water addition reaches 13-16% of the oil mass, the water addition is completed and the oil extraction stage is automatically entered; S3, oil extraction stage: after the water is added, the temperature in the mixing chamber body continues to maintain 65-72℃, and the first and second mixing shafts continuously change the mixing mode; the material in the mixing chamber body continuously changes the movement direction with the first and second spiral blades, the material is emulsified, the oil is released and agglomerated, and then automatically enters the purification stage; in the oil extraction stage, the material and the material, the material and the mixing chamber wall, and the material and the spiral blades are constantly torn, kneaded, and squeezed. Since the temperature and humidity of the protein contained in the material have reached the optimal emulsification conditions, it is repeatedly torn, kneaded, and squeezed through the stirring action. The protein will gradually emulsify. After emulsification, the protein has a high hydrophilic and oleophobic property. Therefore, during the emulsification process, the protein will gradually release the oil contained in it. As the emulsification degree increases, the oil released by the oil extraction material will also increase. At the same time, after the protein releases the oil, the oil content itself will decrease, the viscosity will increase, and the oil residue will stick together into blocks, like a smooth dough. When the oil inside is released almost completely, the oil extraction stage is completed.

[0033] S4, purification stage: when the oil is completely released into the mixing chamber, the emulsified protein has high water absorption and high viscosity. The agglomerated materials are continuously stirred to make the agglomerated proteins roll left and right in the oil. The purpose is to adhere the residual particles or small pieces of oil residue in the oil to the oil residue; absorb the residual water in the oil more thoroughly. The oil becomes clearer and purer, and then automatically enters the solid-liquid separation stage, that is, the oil release stage.

[0034] S5, oil discharge stage: after the first stirring shaft and the second stirring shaft operate to push the oil residue mass to one end of the stirring bin close to the oil residue baffle, the first stirring shaft and the second stirring shaft stop rotating, and the oil baffle moves to open the oil outlet, and oil discharge is performed once; Then the first stirring shaft and the second stirring shaft rotate in opposite directions to move the oil residue mass toward the oil outlet, but not to the oil outlet, and then the rotation directions of the first stirring shaft and the second stirring shaft are changed to push the oil residue mass to one end of the stirring bin close to the oil residue baffle, and the first stirring shaft and the second stirring shaft stop rotating for a period of time to perform secondary oil discharge; Repeat the secondary oil discharge step many times until the oil discharge is completed and the slag discharge stage begins. Since the mixing chamber is tilted toward the oil outlet as a whole, the oil will flow out through the oil outlet along the tilted direction. In order to avoid the formation of grooves between the oil residue group and the spiral blades, which will prevent the oil from flowing out, the secondary oil discharge step will be repeated many times during the oil discharge process to change the posture and angle of the oil residue group and improve the adequacy of oil discharge.

[0035] S6, slag discharge stage: the first stirring shaft and the second stirring shaft rotate to push the oil residue mass toward the oil liquid outlet, but not to the oil liquid outlet; then change the rotation direction of the first stirring shaft and the second stirring shaft to push the oil residue mass toward the oil residue outlet; repeat the above steps multiple times; then the oil residue baffle moves until the oil residue outlet is opened, and the first stirring shaft and the second stirring shaft rotate to push the oil residue mass out of the oil residue outlet, thereby completing slag discharge.

[0036] By adopting the above technical solution, 65-72°C is selected because protein is easy to emulsify when it reaches 65°C, and oils, such as unsaturated fatty acids (linoleic acid and linolenic acid), which are important beneficial substances in walnut oil, are easily volatilized at high temperatures, while they are less volatilized or not volatilized at 72°C, and the oil yield and efficiency are higher.

[0037] After the powder reaches the emulsification condition and forms emulsified protein, it has the characteristics of hydrophilicity and oleophobicity. At the same time, it has high adhesion. Through a specific stirring method, it can not only form a mass by itself, but also adhere other non-protein substances (such as plant fibers) to it, forming a smooth round solid object like dough.

[0038] During the water absorption and emulsification process of the powder, if the amount of water is too much, the powder absorbs too much water, resulting in residual water in the oil, the oil residue mass is not formed, and the oil and oil residue cannot be completely separated. If the amount of water is too little, the powder does not absorb enough water, resulting in incomplete or no oil output. The present application can accurately control the amount of water added, thereby facilitating the emulsification of the oil into a mass and the output of oil.

[0039] By extracting oil through the stirring method of the present application, the water in the stirring bin body can be almost completely absorbed by the oil residue mass, and the liquid in the stirring bin body contains almost no water except the oil. The extracted oil has an extremely high purity rate and can be directly bottled and used.

[0040] In summary, the present application includes at least the following beneficial technical effects: 1. Low-temperature pure physical extraction not only does not destroy the unsaturated fatty acids and trace elements that are beneficial to the body, but also does not contain any additives; by extracting the oil through the stirring method of the present application, the water in the stirring bin body can be almost completely absorbed by the oil residue mass, and the liquid in the stirring bin body contains almost no water except the oil. The extracted oil has an extremely high purity rate and can be directly bottled and used.

[0041] 2. During the oil production process, the emulsified protein with strong adhesion will bind the impurities and water in the oil into clumps. The produced oil does not need to be refined further and is a high-end nutritional oil that can be eaten directly.

[0042] 3. Under the premise of the same raw materials, the oil extracted by the process of this application has a longer shelf life than the oil produced by other processes.

[0043] 4. Since the process of the present application can use nuts as oil, such as walnut kernels, the oil residue after oil extraction has not been subjected to high-temperature ripening and has no other impurities. The oil residue after oil extraction can be used as a raw material for high-end plant protein powder, and can also be used as a raw material for other food additives, such as biscuits and pastries; the raw material utilization rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the agitator in the embodiment of the present application.

[0045] Figure 2 It is a schematic diagram of the structure of the mixing chamber used to illustrate the embodiment of the present application.

[0046] Figure 3 It is a schematic diagram used to show the structure of the drive components.

[0047] Figure 4 It is a top view of the mixing chamber body.

[0048] Figure 5 It is a schematic diagram for showing the structure of the bottom of the mixing chamber body.

[0049] Figure 6 It is a structural diagram used to display the unit warehouse.

[0050] Figure 7 It is a structural diagram for showing the oil discharge drive mechanism.

[0051] Figure 8 It is a structural schematic diagram used to show the slag discharge drive mechanism.

[0052] Fig. 9 It is a schematic diagram showing the structure of the oil discharge drive mechanism from another angle.

[0053] Fig.10 It is a schematic diagram for showing the structure of the first telescopic cylinder.

[0054] Fig.11 It is a schematic diagram for showing the structure of the oil baffle.

[0055] Fig.12 It is a structural diagram used to show the oil residue outlet.

[0056] Fig.13 It is a schematic diagram showing the structure of the oil residue outlet from another angle.

[0057] Fig.14 This is a schematic diagram comparing the acid values ​​of three oil extraction methods.

[0058] Fig.15 This is a schematic diagram comparing the peroxide values ​​of three oil extraction methods.

[0059] Fig.16 This is a schematic diagram of the α-tocopherol determination results of three oil extraction methods.

[0060] Fig.17 This is a schematic diagram of the γ-tocopherol determination results of three oil extraction methods.

[0061] Fig.18 This is a schematic diagram of the squalene determination results of three oil extraction methods.

[0062] Fig.19 This is a schematic diagram of the β-sitosterol determination results of three oil extraction methods.

[0063] Fig. 20 This is a schematic diagram comparing the ingredients such as coenzyme Q10 in different walnut oils.

[0064] Fig.21 This is a schematic diagram of shelf life prediction for different walnut oil extraction methods.

[0065] Fig. 22 This is a schematic diagram of protein content in three oil extraction methods.

[0066] Fig.23 This is a schematic diagram of the residual oil rate of three oil extraction methods.

[0067] Fig.24 It is a schematic diagram of the results of determining the nutritional index of meal meal according to the stirring method of the present application.

[0068] Explanation of the reference numerals: 1. first stirring shaft; 11. first spiral blade; 2. second stirring shaft; 21. second spiral blade; 3. connecting plate; 4. stirring chamber body; 41. unit chamber; 42. oil residue outlet; 43. oil outlet; 44. fixing plate; 45. oil guide box; 46. extended guide cylinder; 5. driving assembly; 51. first reduction motor; 52. second reduction motor; 6. heating automatic water injection device; 61. rotating nozzle; 7. slag discharge driving mechanism; 71. oil residue baffle; 72. second telescopic cylinder; 73. mounting bracket; 74. mounting rod; 75. rocker rod; 8. oil discharge driving mechanism; 81. oil baffle; 82. first telescopic cylinder; 83. synchronization plate; 84. connecting rod. DETAILED DESCRIPTION

[0069] The following is combined with Figure 1-13 This application is described in further detail.

[0070] The embodiments of the present application disclose an agitator, a mixing chamber and a mixing method.

[0071] Example 1 In a first aspect, the present application discloses an agitator: Reference Figure 1 A stirrer comprises a first stirring shaft 1 and a second stirring shaft 2 arranged in parallel, the first stirring shaft 1 is provided with a first spiral blade 11, the second stirring shaft 2 is provided with a second spiral blade 21, the inner sides of the first spiral blade 11 and the second spiral blade 21 are fixedly connected to a plurality of connecting plates 3, the first spiral blade 11 is fixedly connected to the first stirring shaft 1 through the connecting plate 3 to form a hollow structure, and the second spiral blade 21 is also fixedly connected to the second stirring shaft 2 through the connecting plate 3 to form a hollow structure.

[0072] In view of the special oil production method of the present application, the first spiral blade 11 and the second spiral blade 21 are hollow. As the viscosity of the material increases, the material can pass through the first spiral blade 11 and the second spiral blade 21 in addition to the outside. The second spiral blade 21 can also pass through the inside of the first spiral blade 11 and the second spiral blade 21, thereby helping to reduce stirring resistance, reduce the load of the rotating motor, and increase the service life of the rotating motor; and it is easier to tear, squeeze, knead, and rub the emulsified protein mass with higher adhesion, thereby improving the oil yield; and it can reduce the dead angle between the spiral blade and the shaft, making it easier to clean.

[0073] In a second aspect, the present application discloses a stirring tank for oil extraction: Reference Figure 1-4A mixing chamber comprises a mixing chamber body 4, a driving assembly 5 and the above-mentioned agitator, wherein the agitator is arranged in the mixing chamber body 4; the two ends of the first agitator shaft 1 are rotatably connected to the two opposite side walls of the mixing chamber body 4 through bearings, and the two ends of the second agitator shaft 2 are also rotatably connected to the two side walls of the mixing chamber body 4 through bearings. The driving assembly 5 is used to drive the first agitator shaft 1 and the second agitator shaft 2 to rotate, and the rotation axes of the first agitator shaft 1 and the second agitator shaft 2 are both their own axes; the mixing chamber body 4 is provided with a heating device and a heating automatic water injection device 6, and the heating automatic water injection device 6 is provided with a rotating nozzle 61, and the rotating nozzle 61 is arranged toward the mixing chamber body 4. The heating device adopts a silicone sheet with a built-in electric heating wire, and the silicone sheet is pasted on the outer side of the bottom of the mixing chamber body 4 with imported glue, and the side wall of the mixing chamber body 4 is made of 304 stainless steel. The silicone sheet can evenly heat the oil through the heat transfer effect of the side wall of the mixing chamber body 4. The heating automatic water injection device 6 adopts the existing technology, and can be selected and installed according to the actual situation.

[0074] When the mixing bin of the present application is in use, oil is added to the mixing bin body 4, the oil in the mixing bin is heated to a specified temperature by a heating device, and then a specified temperature and a certain amount of water is added to the mixing bin body 4 by a heating automatic water injection device 6. Through the setting of the rotating nozzle 61, water can be sprayed in the form of a fan to cover the entire interior of the mixing bin body 4, so that water can be added quickly and evenly, and the powder can absorb water quickly and evenly, thereby quickly emulsifying, oiling, and agglomerating, thereby improving the oil yield.

[0075] After the water is added, the temperature in the mixing chamber body 4 continues to maintain the specified temperature, and then the first mixing shaft 1 and the second mixing shaft 2 are driven to rotate by the driving assembly 5, and the first mixing shaft 1 and the second mixing shaft 2 continuously change the mixing mode. The oil in the mixing chamber body 4 continuously changes the movement direction with the first spiral blade 11 and the second spiral blade 21, and the oil is emulsified, the oil is released and agglomerated; the oil and the oil, the oil and the inner wall of the mixing chamber body 4, and the oil and the first spiral blade 11 and the second spiral blade 21 are continuously torn, kneaded, and squeezed.

[0076] Since the temperature and humidity of the protein in the oil have reached the optimal emulsification conditions, the oil is repeatedly torn, rubbed, and squeezed through stirring. The protein in the oil will gradually emulsify. After emulsification, the protein has a high hydrophilic and oleophobic property. Therefore, during the emulsification process, the oil protein will gradually release the oil contained in it. As the emulsification degree becomes higher and higher, the oil released from the oil will become more and more. At the same time, after the protein releases the oil, the oil content itself will become less and less, the viscosity will become higher and higher, and the oil residue will stick together into blocks, shaped like smooth dough.

[0077] When the oil is completely released into the stirring chamber body 4, the agglomerated oil is continuously stirred by taking advantage of the fact that the emulsified protein has high water absorption and high viscosity. The agglomerated protein is continuously rolled left and right in the oil, the purpose of which is to adhere the residual particles or small pieces of oil residue in the oil to the oil residue agglomerates, and to absorb the residual water in the oil more thoroughly, so as to obtain a clearer and purer oil.

[0078] Reference Figure 3-4 The driving assembly 5 includes a first reduction motor 51 and a second reduction motor 52 . The rotating shaft of the first reduction motor 51 is fixedly connected to the first stirring shaft 1 , and the rotating shaft of the second reduction motor 52 is fixedly connected to the second stirring shaft 2 .

[0079] The first reduction motor 51 and the second reduction motor 52 respectively control the rotation of the first stirring shaft 1 and the second stirring shaft 2, and can realize various stirring modes: Oil circulates clockwise: When the first reduction motor 51 and the second reduction motor 52 rotate counterclockwise, the oil will be driven by the first spiral blade 11 and the second spiral blade 21 to circulate in the clockwise direction.

[0080] Oil circulates counterclockwise: When the first reduction motor 51 and the second reduction motor 52 rotate clockwise, the oil is driven by the first spiral blade 11 and the second spiral blade 21 to circulate counterclockwise.

[0081] The oil flows to the left (away from the first reduction motor): when the first reduction motor 51 rotates counterclockwise and the second reduction motor 52 rotates clockwise, the oil will be driven by the first spiral blade 11 and the second spiral blade 21 to move to the left.

[0082] The oil flows to the right (toward the direction close to the first reduction motor): when the first reduction motor 51 rotates clockwise and the second reduction motor 52 rotates counterclockwise, the oil will be driven by the first spiral blade 11 and the second spiral blade 21 to move to the right.

[0083] Reference Figure 5-6The bottom wall of the mixing bin body 4 is arranged in an arc shape to form two unit bins 41, and the first mixing shaft 1 and the second mixing shaft 2 are respectively located in the two unit bins 41. The two unit bins 41 are divided into two unit bins, which is helpful to realize the oil partitioning, and the oil in the mixing bin body 4 is orderly carried out in accordance with the different mixing forms, such as clockwise circulation: when the first reduction motor 51 and the second reduction motor 52 rotate counterclockwise, the oil will be driven by the first spiral blade 11 and the second spiral blade 21 to circulate in the clockwise direction. During the circulation process, the oil on both sides moves in the two unit bins 41, and the unit bin 41 is replaced at the end of the mixing bin body 4 to form a cycle. The arc bottom wall of the unit bin 41 can provide a better force-bearing surface for the oil in the mixing bin body 4, which helps the oil to form agglomerates, and ultimately helps to improve the oil yield and efficiency.

[0084] Reference Figure 7-12 Two oil residue outlets 42 and two oil liquid outlets 43 are respectively provided on the side walls at both ends of the unit bin 41. The oil residue outlets 42 and the oil liquid outlets 43 are arranged near the lowest part of the side walls of the unit bin 41, and the size of the oil residue outlet 42 is larger than the size of the oil liquid outlet 43. A slag discharge drive mechanism 7 and an oil discharge drive mechanism 8 are arranged outside the mixing bin body 4. An oil residue baffle 71 is movably arranged at the oil residue outlet 42 through the oil residue drive assembly 5. The oil residue baffle 71 is used to block or open the oil residue outlet 42; an oil liquid baffle 81 is movably arranged at the oil liquid outlet 43 through the oil discharge drive mechanism 8. The oil liquid baffle 81 is used to block or open the oil liquid outlet 43. The bottom wall of the mixing bin body 4 is arranged obliquely, and the lowest end of the bottom wall of the mixing bin body 4 is located at the oil liquid outlet 43.

[0085] After the oil in the mixing chamber becomes clearer and purer, drain the oil and slag in turn: When draining the oil: after the first stirring shaft 1 and the second stirring shaft 2 operate to push the oil residue mass to one end of the stirring bin close to the oil residue baffle 71, the first stirring shaft 1 and the second stirring shaft 2 stop rotating, and the oil baffle 81 moves to open the oil outlet 43 to drain the oil; since the stirring bin body 4 is tilted toward the oil outlet 43 as a whole, the oil will flow out through the oil outlet 43 along the tilted direction.

[0086] Then the first stirring shaft 1 and the second stirring shaft 2 rotate in opposite directions, so that the oil residue mass moves toward the oil outlet 43, but does not move to the oil outlet 43, and then the rotation direction of the first stirring shaft 1 and the second stirring shaft 2 is changed to push the oil residue mass to one end of the stirring bin body 4 close to the oil residue baffle 71, and the first stirring shaft 1 and the second stirring shaft 2 stop rotating for a period of time to perform secondary oil release; the secondary oil release step is repeated many times until the oil release is completed. In order to avoid the formation of grooves between the oil residue mass and the first spiral blade 11 and the second spiral blade 21, which prevents the oil from flowing out, the secondary oil release step will be repeated many times during the oil release process to change the posture and angle of the oil residue mass and improve the adequacy of oil release.

[0087] During slag discharge: after the oil is discharged, the slag is discharged. The first stirring shaft 1 and the second stirring shaft 2 rotate to push the oil residue mass toward the oil liquid outlet 43, but not to the oil liquid outlet 43; then change the rotation direction of the first stirring shaft 1 and the second stirring shaft 2, and push the oil residue mass toward the oil residue outlet 42; repeat the above steps several times to make the oil residue fragments in the stirring bin body 4 adhere to the oil residue mass as much as possible; then move the oil residue baffle 71 until the oil residue outlet 42 is opened, and the first stirring shaft 1 and the second stirring shaft 2 rotate to push the oil residue mass toward the oil residue outlet 42, completing the slag discharge.

[0088] In order to more thoroughly distinguish oil from oil residue, the oil liquid outlet 43 and the oil residue outlet 42 are independently arranged at the left and right ends of the mixing chamber body 4. After the entire mixing chamber body 4 is installed, the mixing chamber body 4 is tilted toward the oil outlet direction, which facilitates the oil to flow out smoothly from the oil outlet to achieve solid-liquid separation.

[0089] Reference Figure 10-11 A fixing plate 44 is fixedly arranged on the outer wall of the mixing bin body 4 on which the oil outlet 43 is opened, and the oil outlet 43 penetrates the fixing plate 44. The oil discharge drive mechanism 8 includes a first telescopic cylinder 82, a synchronous plate 83 and a connecting rod 84. The tail end of the first telescopic cylinder 82 is fixedly mounted on the fixing plate 44, the output end of the first telescopic cylinder 82 is fixedly connected to the middle of the synchronous plate 83, the connecting rod 84 is fixedly connected to both ends of the synchronous plate 83, and the end of the connecting rod 84 away from the synchronous plate 83 is correspondingly connected to the oil baffle 81.

[0090] When the oil outlet 43 needs to be opened, the first telescopic cylinder 82 is started, the piston rod of the first telescopic cylinder 82 is extended, driving the synchronous plate 83 to move away from the mixing chamber body 4, and then driving the oil baffle 81 to move away from the oil outlet 43 through the connecting rod 84, so as to open the oil outlet 43; when the oil outlet 43 needs to be closed, the piston rod of the first telescopic cylinder 82 is shortened to reset. The operation is simple and convenient, and the oil discharge drive mechanism 8 is integrally arranged at the end of the mixing chamber body 4, with a compact structure and small installation space and activity space.

[0091] Reference Figure 10-11The fixed plate 44 is fixedly mounted with an oil guide box 45, and the oil outlet 43 is arranged one by one with the oil guide box 45. The oil outlet 43 penetrates the side wall of the oil guide box 45 close to the mixing chamber body 4, and the bottom of the oil guide box 45 is arranged in a cone shape. The oil baffle 81 is arranged in the oil guide box 45, and the connecting rod 84 passes through the side wall of the oil guide box 45 away from the mixing chamber body 4 and is connected to the oil baffle 81. The setting of the oil guide box 45, on the one hand, helps to guide the oil to fall to the designated position; on the other hand, it can limit the telescopic path of the connecting rod 84, improve the telescopic stability of the connecting rod 84, and then improve the stability of the movement of the oil baffle 81, so that the oil baffle 81 can accurately open and close the oil outlet 43.

[0092] Reference Fig.10 An extended guide cylinder 46 is fixedly mounted on the side wall of the oil guide box 45 away from the mixing chamber body 4, and the extended guide cylinder 46 penetrates the side wall of the oil guide box 45 away from the mixing chamber body 4, and the connecting rod 84 passes through the extended guide cylinder 46. The setting of the extended guide cylinder 46 can increase the limit length of the connecting rod 84, thereby further improving the stability of the extension and retraction of the connecting rod 84, and further improving the stability of the movement of the oil baffle 81.

[0093] Reference Figure 12-13 The slag discharge driving mechanism 7 includes a second telescopic cylinder 72, a mounting bracket 73, a mounting rod 74 and a swing rod 75. The mounting bracket 73 and the mounting rod 74 are fixedly mounted on the outer wall of the mixing chamber body 4 away from the oil outlet 43. The mounting bracket 73, the mounting rod 74 and the oil residue baffle 71 are arranged in sequence from top to bottom. The tail end of the second telescopic cylinder 72 is hinged to the mounting bracket 73, and the output end of the second telescopic cylinder 72 is hinged to the oil residue baffle 71. The swing rod 75 is rotatably connected to both ends of the mounting rod 74, and one end of the swing rod 75 away from the mounting rod 74 is fixedly connected to the oil residue baffle 71.

[0094] When the oil residue outlet 42 needs to be opened for slag discharge, the second telescopic cylinder 72 is started, the piston rod of the second telescopic cylinder 72 is shortened, and then the swing rod 75 and the oil residue baffle 71 are driven to rotate, so that the oil residue outlet 42 is opened; when the oil residue outlet 42 needs to be closed, the second telescopic cylinder 72 is extended to reset, and the operation is simple and convenient, and the slag discharge drive mechanism 7 is integrally arranged at the end of the mixing bin body 4, with a compact structure and small installation space and activity space. The slag discharge drive mechanism 7 adopts a different structure from the oil discharge drive mechanism 8 because the oil residue has weaker fluidity and is in a clumping shape compared to the oil liquid, so a larger outlet is required, and the structure of the oil discharge drive mechanism 8 is not suitable for slag discharge, so drive structures suitable for oil discharge and slag discharge are respectively set.

[0095] In a third aspect, the present application discloses a stirring method: A stirring method, carried out by the stirring chamber, comprises the following steps: S1, preheating stage: after the material completely enters the mixing bin body 4, the heating device is started to control the temperature in the mixing bin body 4 to 65-72°C, and at the same time, the first stirring shaft 1 and the second stirring shaft 2 rotate around their own axes to push the material in the mixing bin body in a clockwise and counterclockwise cycle, alternately running; When the material reaches the water adding condition, that is, the material is evenly heated to 65-72°C, it automatically enters the water adding stage; in the embodiment of the present application, the temperature of the mixing bin body 4 and the material evenly heated is 71°C; S2, water adding stage: after the water adding condition is met, the rotation direction of the first stirring shaft 1 and the second stirring shaft 2 is changed, and the material is continuously pushed counterclockwise; the heating automatic water injection device 6 automatically operates, and the water adding temperature is consistent with the temperature in the stirring bin body 4. After the water addition amount reaches 13-16% of the oil mass, the water addition is completed and the oil extraction stage is automatically entered; the water addition amount in the embodiment of the present application is 13% of the oil mass; S3, oil extraction stage: After the water is added, the temperature in the stirring chamber body 4 continues to maintain 71°C, and the first stirring shaft 1 and the second stirring shaft 2 continuously change the stirring mode; the material in the stirring chamber body 4 continuously changes the movement direction with the first spiral blade 11 and the second spiral blade 21, the material is emulsified, the oil is released and agglomerated, and then automatically enters the purification stage. In the oil extraction stage, the material and the material, the material and the wall of the stirring chamber, and the material and the spiral blades are constantly torn, kneaded, and squeezed. Since the temperature and humidity of the protein contained in the material have reached the optimal emulsification conditions, it is repeatedly torn, kneaded, and squeezed through the stirring action. The protein will gradually emulsify. After emulsification, the protein has a high hydrophilic and oleophobic property. Therefore, during the emulsification process of the protein, the oil contained in it will gradually be released. As the emulsification degree increases, the oil released by the oil extraction material will also increase. At the same time, after the protein releases the oil, the oil content itself will become less and less, the viscosity will become higher and higher, and the oil residue will be bonded into blocks, shaped like smooth dough. When the oil in the oil is released to nearly complete, the oil extraction stage is completed. The time of the oil extraction stage is 15 minutes.

[0096] S4, purification stage: when the oil is completely released into the mixing chamber, the emulsified protein has high water absorption and high viscosity. The agglomerated materials are continuously stirred to make the agglomerated proteins roll left and right in the oil. The purpose is to adhere the residual particles or small pieces of oil residue in the oil to the oil residue; absorb the residual water in the oil more thoroughly. The oil becomes clearer and purer. The purification stage lasts for 2 minutes, and then automatically enters the solid-liquid separation stage, that is, the oil release stage.

[0097] S5, oil discharge stage: after the first stirring shaft 1 and the second stirring shaft 2 operate to push the oil residue mass to one end of the stirring bin close to the oil residue baffle 71, the first stirring shaft 1 and the second stirring shaft 2 stop rotating, and the oil baffle 81 moves to open the oil outlet 43 to discharge the oil; Then the first stirring shaft 1 and the second stirring shaft 2 rotate in opposite directions, so that the oil residue mass moves toward the oil outlet 43, but does not move to the oil outlet 43, and then the rotation direction of the first stirring shaft 1 and the second stirring shaft 2 is changed to push the oil residue mass to one end of the stirring bin close to the oil residue baffle 71, and the first stirring shaft 1 and the second stirring shaft 2 stop rotating for a period of time to perform secondary oil discharge; Repeat the secondary oil discharge step many times until the oil discharge is completed and enter the slag discharge stage. Since the mixing chamber is tilted toward the oil outlet 43 as a whole, the oil will flow out through the oil outlet 43 along the tilted direction. In order to prevent the oil from flowing out due to the formation of grooves between the oil residue mass and the first spiral blade 11 and the second spiral blade 21, the secondary oil discharge step will be repeated many times during the oil discharge process to change the posture and angle of the oil residue mass and improve the adequacy of oil discharge. The oil discharge stage lasts for 3 minutes.

[0098] S6, slag discharge stage: the first stirring shaft 1 and the second stirring shaft 2 rotate to push the oil residue mass toward the oil liquid outlet 43, but not to the oil liquid outlet 43; then change the rotation direction of the first stirring shaft 1 and the second stirring shaft 2 to push the oil residue mass toward the oil residue outlet 42; repeat the above steps multiple times; then the oil residue baffle 71 moves until the oil residue outlet 42 is opened, and the first stirring shaft 1 and the second stirring shaft 2 rotate to push the oil residue mass toward the oil residue outlet 42 to complete the slag discharge.

[0099] 65-72℃ is chosen because protein is easy to emulsify when it reaches 65℃, and unsaturated fatty acids (linoleic acid and linolenic acid), which are important beneficial substances in oils such as walnut oil, are easily volatilized at high temperatures, while they evaporate less or not at all at 72℃, and the oil yield and efficiency are higher.

[0100] After the powder reaches the emulsification condition and forms emulsified protein, it has the characteristics of hydrophilicity and oleophobicity. At the same time, it has high adhesion. Through a specific stirring method, it can not only form a mass by itself, but also adhere other non-protein substances (such as plant fibers) to it, forming a smooth round solid object like dough.

[0101] During the water absorption and emulsification process of the powder, if the amount of water is too much, the powder absorbs too much water, resulting in residual water in the oil, the oil residue mass is not formed, and the oil and oil residue cannot be completely separated. If the amount of water is too little, the powder does not absorb enough water, resulting in incomplete or no oil output. The present application can accurately control the amount of water added, thereby facilitating the emulsification of the oil into a mass and the output of oil.

[0102] By extracting oil through the stirring method of the present application, the water in the stirring bin body 4 can be almost completely absorbed by the oil residue mass, and the liquid in the stirring bin body 4 contains almost no water except the oil. The extracted oil has an extremely high purity rate and can be directly bottled and used.

[0103] Example 2 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 70° C., that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 70° C.; and the water adding ratio is 14% of the mass of the oil.

[0104] Example 3 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 70°C, that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 70°C.

[0105] Example 4 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 70°C, that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 70°C; and the water adding ratio is 16% of the mass of the oil.

[0106] Example 5 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 65°C, that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 65°C.

[0107] Example 6 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 72°C, that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 72°C.

[0108] Comparative Example 1 The difference between the embodiment of the present application and embodiment 1 is that the water addition ratio in the embodiment of the present application is 12.8% of the mass of the oil.

[0109] Comparative Example 2 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 70° C., that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 70° C.; and the water adding ratio is 18% of the mass of the oil.

[0110] Comparative Example 3 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 60°C, that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 60°C.

[0111] Comparative Example 4 The difference between the embodiment of the present application and embodiment 1 is that the extraction temperature in the embodiment of the present application is 75°C, that is, the temperature inside the stirring chamber body 4 and the water adding temperature are 75°C.

[0112] Comparison of water-replacement method for oil extraction in this application with other methods The three methods are screw pressing, hydraulic pressing and the water-substitute stirring method of the present application. The oil material is ground walnut kernels. The screw pressing method and the hydraulic pressing method are both existing technologies.

[0113] Hydraulic pressing method: Walnut oil is obtained by low-temperature pressing using a fully automatic hydraulic oil press. The pressing temperature is room temperature (about 25°C), the pressure is set to 48MPa, and the pressing time is about 2h.

[0114] Screw pressing method: Walnut oil is obtained by high-temperature pressing using a screw press, with the pressing temperature being around 100°C.

[0115] 1. The influence of three oil extraction methods on the quality of walnut oil The following methods for determining the quality indexes of walnut oil all adopt the determination methods in the prior art, and this application will not go into details.

[0116] 1. Comparison of oil acidity of three oil extraction methods Reference Fig.14 The comparison results of acid values ​​of different oil extraction methods show that the acid value content of walnut oil extracted by the three oil extraction methods is within the national standard range. The acid value of walnut oil obtained by the new method of the present application is significantly lower than that of screw pressing and hydraulic pressing, but the difference in acid value content between walnut oil produced by screw pressing and hydraulic pressing is not significant. Among them, the acid value of walnut oil produced by the water-substitution stirring method of the present application is 0.52±0.015 mgKOH / g, and the acid value of the hydraulic pressing method is 0.65±0.014 mgKOH / g.

[0117] 2. Comparison of oil peroxide values ​​of three oil extraction methods Reference Fig.15 The comparison results of peroxide values ​​of different oil pressing methods show that the peroxide value content of walnut oil extracted by the three oil pressing methods is within the national standard range. The lowest peroxide value of walnut oil obtained by the new method of the present application is 0.010±0.005g / 100g, which is significantly lower than the 0.068±0.002 g / 100g of hydraulic pressing, and has no significant difference with the peroxide value of 0.023±0.003 g / 100g of screw pressing.

[0118] 3. Other physical and chemical indicators of three oil extraction methods The refractive index, relative density, iodine value, saponification value, insoluble impurities and oil color of walnut oil from the three oil extraction methods are shown in the following table, all of which meet the national standards.

[0119] Table 1 Oil quality of different oil pressing methods

[0120] 4. Comparison of α-tocopherol content in three oil extraction methods Reference Fig.16 The results of α-tocopherol content in different oil extraction methods show that the α-tocopherol content of walnut oil obtained by the new method of the present application is higher than that of walnut oil produced by screw pressing and hydraulic pressing, but there is no significant difference in the α-tocopherol content between the walnut oil produced by the water-substitute stirring method of the present application and the screw pressing method. The α-tocopherol content of the water-substitute stirring method of the present application is 31.47±1.37μg / mL, the hydraulic pressing is 25.17±1.05μg / mL, and the screw pressing is 27.922±1.28μg / mL.

[0121] 5. Comparison of γ-tocopherol in three oil extraction methods Reference Fig.17 The results of γ-tocopherol content in different oil extraction methods showed that the γ-tocopherol content in the walnut oil obtained by the water-substituting stirring method of the present application was significantly higher than that by screw pressing and hydraulic pressing. The γ-tocopherol content in the walnut oil produced by the stirring method of the present application was 4.93±0.58μg / mL, that by hydraulic pressing was 1.84±0.41μg / mL, and that by screw pressing was 2.3868±0.32μg / mL.

[0122] 6. Comparison of squalene content in three oil extraction methods Reference Fig.18 , the results of squalene content in different oil extraction methods show that the squalene content in the walnut oil obtained by the water-substitute stirring method of the present application is significantly higher than that by the screw pressing method and the hydraulic pressing method. The squalene content in the walnut oil obtained by the screw pressing method is significantly lower than that by the stirring method and the hydraulic pressing of the present application. Among them, the squalene content in the walnut oil produced by the stirring method of the present application is 68.82±1.52μg / mL, the screw pressing method is 17.8733±1.58μg / mL, and the hydraulic pressing method is 37.2205±1.65μg / mL.

[0123] 7. Comparison of β-sitosterol content in three oil extraction methods Reference Fig.19 The results of β-sitosterol content in different oil extraction methods show that the β-sitosterol content in walnut oil obtained by the stirring method of the present application is significantly higher than that of the screw pressing method and the hydraulic pressing method. The β-sitosterol content in walnut oil produced by the stirring method of the present application is 661.95±5.24μg / mL, the hydraulic pressing method is 409.8545±4.17μg / mL, and the screw pressing method is 280.67±4.69μg / mL.

[0124] 8. Analysis of coenzyme Q10 and other ingredients in different types of walnut oil Reference Fig. 20 As shown in the figure, the coenzyme Q10 and rutin contents in the walnut oil produced by the water-substituting stirring method of the present application are significantly higher than those of the other three walnut oils, and the trinaphthol content is also significantly higher than that of the original and commercially available walnut oils. There is no significant difference in the contents of flavonols and juglone among the four walnut oils.

[0125] 2. Prediction of the shelf life of walnut oil Reference Fig.21 The comparison of shelf life of different walnut oil production methods is shown in the figure below. The walnut oil obtained by the water-substitute stirring method of the present application has a shelf life significantly higher than that of the screw pressing method and the hydraulic pressing method, whether stored at 20°C or 60°C. The walnut oil produced by the stirring method of the present application has a shelf life of 43 days at 60°C and 688 days at 20°C; the walnut oil produced by the screw pressing method has a shelf life of 36 days at 60°C and 570 days at 20°C; the walnut oil produced by the hydraulic pressing method has a shelf life of 31 days at 60°C and 506 days at 20°C.

[0126] 3. Analysis of Walnut Cake Composition (1) Comparison of protein content among three oil extraction methods Reference Fig. 22 The protein content of walnut cake prepared by the water-substitute stirring method of the present application and hydraulic pressing and screw pressing is as follows: Fig.12 As shown, among the walnut cakes obtained by different oil-making methods, the protein content in the cakes of the stirring method of the present application is higher than that in the cakes of the screw pressing method and the hydraulic pressing method, but there is no significant difference in the protein content of the cakes of the stirring method of the present application and the screw pressing method. The protein content of the cakes of the stirring method of the present application is 54.28±0.45%, and the protein content of the cakes of the hydraulic pressing method is 45.17±0.36%.

[0127] (2) Comparison of residual oil rates among three oil pressing methods Reference Fig.23 The residual oil rates of different oil pressing methods are shown in the figure below. There are significant differences in the residual oil rates between different methods. The residual oil rate of the water-based stirring method of the present application is 7.9%, the screw pressing is 5.0%, and the hydraulic pressing is 13.7%. The residual oil rate of the stirring method of the present application is significantly lower than that of the hydraulic pressing.

[0128] (3) Comparison of nutritional indicators of walnut meal prepared by the stirring method of this application Reference Fig.24The protein content, fat, moisture, crude fiber, ash and carbohydrate content of the skinned and undressed walnut cake powder prepared by the stirring method of the present application are shown in the figure below. The protein and moisture contents of the skinned walnut cake powder in the stirring method of the present application are lower than those of the undressed walnut cake powder, while the fat, crude fiber, ash and carbohydrate contents are higher than those of the undressed walnut cake powder.

[0129] Water addition ratio and extraction temperature: The oil yield and oil yield efficiency test methods of oil are prior art and can be measured using corresponding standards and methods, and the following measurement table 2 is obtained: Table 2

[0130] Compare Examples 2, 3, 4 and Comparative Examples 1-2, as shown in Table 3 below: Table 3

[0131] Referring to Table 3, it can be seen that when all other conditions except the water addition ratio are the same, the oil yield and oil efficiency of Examples 2, 3, and 4 are better than those of Comparative Examples 1-2. Therefore, it is better to control the water addition ratio of the present application to 13%-16% as a process parameter in the stirring method; and 13% is the optimal water addition ratio.

[0132] Compare Examples 1, 3, 5, 6 and Comparative Examples 3-4, as shown in Table 4 below: Table 4 Oil Raw material types Raw material ingredients Water ratio Extraction temperature ℃ Oil yield Oil output efficiency Example 1 Walnut kernels 63.70% 13.00% 71 59.20% 92.94% Example 3 Walnut kernels 63.70% 13.00% 70 56.60% 88.85% Example 5 Walnut kernels 63.70% 13.00% 65 56.60% 88.92% Example 6 Walnut kernels 63.70% 13.00% 72 56.80% 89.17% Comparative Example 3 Walnut kernels 63.70% 13.00% 60 56.00% 86.06% Comparative Example 4 Walnut kernels 63.70% 13.00% 75 56.20% 86.23% Referring to Table 4, it can be seen that when all other conditions except the extraction temperature are the same, the oil yield and oil efficiency of Examples 1, 3, 5, and 6 are better than those of Comparative Examples 3-4. Therefore, the extraction temperature of the present application is controlled at 65-72°C as a process parameter in the stirring method, and 71°C is the optimal temperature.

[0133] In summary, by comparing the quality indicators of walnut oil obtained by the three oil-making methods of screw pressing, hydraulic pressing and the water-substitute stirring method of the present application, it can be seen that the walnut oil obtained by the water-substitute stirring method of the present application has better quality overall; and the present application optimizes the water addition ratio and extraction temperature of the stirring method, significantly improves the oil yield and oil yield efficiency, and can be used for oil extraction, with broad application prospects.

[0134] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stirring method, characterized in that: The steps include: S1, preheating stage: after the material completely enters the stirring chamber body (4), the heating device is started to control the temperature in the stirring chamber to 65-72°C, and at the same time, the first stirring shaft (1) and the second stirring shaft (2) rotate around their own axes to push the material in the stirring chamber body (4) in a clockwise and counterclockwise cycle in alternating operation; When the material reaches the water adding condition, that is, the material is evenly heated to 65-72℃, it automatically enters the water adding stage; S2, water adding stage: after the water adding conditions are met, the rotation direction of the first stirring shaft (1) and the second stirring shaft (2) is changed, and the material is continuously pushed in a counterclockwise cycle; the heating type automatic water injection device (6) automatically operates, and after the amount of water added reaches 13-16% of the mass of the oil, the water addition is completed and the oil extraction stage is automatically entered; S3, oil extraction stage: after the water is added, the temperature in the stirring chamber body (4) continues to be maintained at 65-72°C, and the first stirring shaft (1) and the second stirring shaft (2) continuously change the stirring mode; the material in the stirring chamber body (4) continuously changes the movement direction along with the first spiral blade (11) and the second spiral blade (21), the material is emulsified, the oil is released and agglomerated, and then automatically enters the purification stage; S4, purification stage: continue to stir the agglomerated materials, the oil becomes clearer and purer, and then automatically enters the solid-liquid separation stage, that is, the oil release stage; S5, oil discharge stage: after the first stirring shaft (1) and the second stirring shaft (2) operate to push the oil residue mass to one end of the stirring bin close to the oil residue baffle (71), the first stirring shaft (1) and the second stirring shaft (2) stop rotating, and the oil baffle (81) moves to open the oil outlet (43), and oil discharge is performed; Then, the first stirring shaft (1) and the second stirring shaft (2) rotate in opposite directions, so that the oil residue mass moves toward the oil outlet (43), but does not move to the oil outlet (43). Then, the rotation direction of the first stirring shaft (1) and the second stirring shaft (2) is changed, and the oil residue mass is pushed to one end of the stirring bin close to the oil residue baffle (71). The first stirring shaft (1) and the second stirring shaft (2) stop rotating for a period of time to perform secondary oil discharge. Repeat the steps of secondary oil discharge several times until the oil discharge is completed and the slag discharge stage begins; S6, slag discharge stage: the first stirring shaft (1) and the second stirring shaft (2) rotate to push the oil residue mass toward the oil liquid outlet (43), but not to the oil liquid outlet (43); then change the rotation direction of the first stirring shaft (1) and the second stirring shaft (2) to push the oil residue mass toward the oil residue outlet (42); repeat the above steps multiple times; then the oil residue baffle (71) moves until the oil residue outlet (42) is opened, and the first stirring shaft (1) and the second stirring shaft (2) rotate to push the oil residue mass toward the oil residue outlet (42), thereby completing slag discharge.

2. A stirring method according to claim 1, characterized in that: The stirring is carried out through a stirring chamber, the stirring chamber comprising a stirring chamber body (4), a driving assembly (5) and an agitator; the agitator comprises a first stirring shaft (1) and a second stirring shaft (2) arranged in parallel, the first stirring shaft (1) being provided with a first spiral blade (11), the second stirring shaft (2) being provided with a second spiral blade (21), the inner sides of the first spiral blade (11) and the second spiral blade (21) being fixedly connected to a plurality of connecting plates (3), the first spiral blade (11) being fixedly connected to the first stirring shaft (1) via the connecting plate (3) to form a hollow structure, and the second spiral blade (21) being also fixedly connected to the second stirring shaft (2) via the connecting plate (3) to form a hollow structure.

3. A stirring method according to claim 2, characterized in that: The agitator is arranged in a mixing chamber body (4); the two ends of the first agitator shaft (1) are rotatably connected to two opposite side walls of the mixing chamber body (4), and the two ends of the second agitator shaft (2) are rotatably connected to two side walls of the mixing chamber body (4); the driving assembly (5) is used to drive the first agitator shaft (1) and the second agitator shaft (2) to rotate; the mixing chamber body (4) is provided with a heating device and a heating automatic water injection device (6), and the heating automatic water injection device (6) is provided with a rotating nozzle (61), and the rotating nozzle (61) is arranged toward the mixing chamber body (4).

4. A stirring method according to claim 3, characterized in that: The driving assembly (5) comprises a first reduction motor (51) and a second reduction motor (52), wherein the rotating shaft of the first reduction motor (51) is fixedly connected to the first stirring shaft (1), and the rotating shaft of the second reduction motor (52) is fixedly connected to the second stirring shaft (2).

5. A stirring method according to claim 4, characterized in that: The bottom wall of the stirring chamber body (4) is arranged in an arc shape to form two unit chambers (41), and the first stirring shaft (1) and the second stirring shaft (2) are respectively located in the two unit chambers (41).

6. A stirring method according to claim 5, characterized in that: The side walls at both ends of the unit bin (41) are respectively provided with an oil residue outlet (42) and an oil liquid outlet (43), and the oil residue outlet (42) and the oil liquid outlet (43) are arranged close to the lowest point of the side wall of the unit bin (41); A slag discharge drive mechanism (7) and an oil discharge drive mechanism (8) are arranged outside the mixing chamber body (4); an oil slag baffle (71) is movably arranged at the oil slag outlet (42) through an oil slag drive assembly (5), and the oil slag baffle (71) is used to block or open the oil slag outlet (42); an oil liquid baffle (81) is movably arranged at the oil liquid outlet (43) through the oil discharge drive mechanism (8), and the oil liquid baffle (81) is used to block or open the oil liquid outlet (43); The bottom wall of the stirring chamber body (4) is arranged to be inclined, and the lowest end of the bottom wall of the stirring chamber body (4) is located at the oil outlet (43).

7. A stirring method according to claim 6, characterized in that: A fixing plate (44) is fixedly arranged on the outer side wall of the mixing chamber body (4) on which the oil outlet (43) is opened, and the oil outlet (43) passes through the fixing plate (44); The oil discharge drive mechanism (8) comprises a first telescopic cylinder (82), a synchronous plate (83) and a connecting rod (84); the tail end of the first telescopic cylinder (82) is fixedly mounted on a fixed plate (44); the output end of the first telescopic cylinder (82) is fixedly connected to the middle of the synchronous plate (83); the connecting rod (84) is fixedly connected to both ends of the synchronous plate (83); and one end of the connecting rod (84) away from the synchronous plate (83) is correspondingly connected to an oil baffle (81).

8. A stirring method according to claim 7, characterized in that: An oil guide box (45) is fixedly mounted on the fixed plate (44); the oil outlet (43) is arranged in one-to-one correspondence with the oil guide box (45); the oil outlet (43) penetrates the side wall of the oil guide box (45) close to the stirring chamber body (4); the bottom of the oil guide box (45) is arranged in a conical shape; the oil baffle (81) is arranged in the oil guide box (45); and the connecting rod (84) penetrates the side wall of the oil guide box (45) away from the stirring chamber body (4) and is connected to the oil baffle (81).

9. A stirring method according to claim 8, characterized in that: An extended guide cylinder (46) is fixedly mounted on the side wall of the oil guide box (45) away from the stirring chamber body (4), and the extended guide cylinder (46) penetrates the side wall of the oil guide box (45) away from the stirring chamber body (4), and the connecting rod (84) passes through the extended guide cylinder (46).

10. A stirring method according to claim 6, characterized in that: The slag discharge driving mechanism (7) comprises a second telescopic cylinder (72), a mounting bracket (73), a mounting rod (74) and a swing rod (75); the mounting bracket (73) and the mounting rod (74) are fixedly mounted on the outer side wall of the mixing chamber body (4) away from the oil outlet (43); the mounting bracket (73), the mounting rod (74) and the oil residue baffle (71) are arranged in sequence from top to bottom; The tail end of the second telescopic cylinder (72) is hinged on the mounting bracket (73), and the output end of the second telescopic cylinder (72) is hinged on the oil residue baffle (71); The swing rod (75) is rotatably connected to the two ends of the mounting rod (74), and one end of the swing rod (75) away from the mounting rod (74) is fixedly connected to the oil residue baffle (71).

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