Soybean protein isolate modification apparatus

Abstract

The present application relates to the technical fields of soybean protein isolate modification, and particularly relates to a soybean protein isolate modification equipment, which comprises a modification mixing tank, the inner cavity of the modification mixing tank is provided with an ultrafiltration membrane, and the surface of the ultrafiltration membrane is provided with a stirring and cleaning assembly. The stirring and cleaning assembly is arranged to clean the surface of the ultrafiltration membrane and the inner wall of the modification mixing tank during the stirring of the solution, so as to prevent the surface of the ultrafiltration membrane from being blocked by impurities and affecting the extraction efficiency of the soybean protein isolate, and also prevent the existence of adhesions on the inner wall of the modification mixing tank from causing the protein solution and the papain to be insufficiently mixed and affecting the modification effect of the soybean protein isolate. In combination with the use of the crank rod and the overturning assembly, the overturning blades are installed differently, so that part of the overturning blades rotates clockwise and the other part rotates counterclockwise when synchronously rotating, thus facilitating the stirring of the solution in different positions in different ways and improving the material stirring efficiency.

Description

Technical Field

[0001] This invention relates to the field of soy protein isolate modification technology, and more particularly to a soy protein isolate modification device. Background Technology

[0002] Currently, there are three methods for modifying soy protein isolate: heat treatment, acid treatment, and enzymatic treatment. To improve the surface water absorption, solubility, and emulsification of soy protein isolate, a specific proportion of papain is usually injected into the protein solution before ultrafiltration separation. However, some operators inject the protein solution and papain into the mixing tank simultaneously. This method can cause some dry powder papain to clump together under the coating of the protein solution, resulting in insufficient mixing of solid and liquid materials and difficulty in mixing the dry powder. Ultimately, this affects the modification of soy protein isolate. Furthermore, the internal structure of the mixing tank is relatively simple, usually equipped with a single stirring rod for unidirectional stirring, resulting in low stirring efficiency and limited stirring modes and functions. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a soybean protein isolate modification device that solves the problems of papain raw material caking due to synchronous injection of solid and liquid raw materials, resulting in insufficient mixing of solid and liquid raw materials, which in turn affects the modification effect of soybean protein isolate, as well as the technical problems of the simple internal structure of the mixing tank and its single stirring mode and function.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a soybean protein isolate modification device, comprising a modification mixing tank, wherein an ultrafiltration membrane is provided in the inner cavity of the modification mixing tank, a stirring and cleaning component is provided on the surface of the ultrafiltration membrane, a baffle for preventing powder raw materials from contacting the filter pores of the ultrafiltration membrane is provided on one side of the ultrafiltration membrane, an inclined groove is provided on the modification mixing tank, and a diffusion component for diffusing the contact area between papain and protein solution is provided on one side of the inclined groove, and a powder feeding component and a liquid feeding component for injecting solid and liquid raw materials are provided at the top of the modification mixing tank;

[0005] The stirring and cleaning assembly includes a drive motor installed at the bottom of the modified mixing tank. A rotating shaft is provided on the top of the drive motor, and an internal meshing spur gear transmission mechanism is provided on the top of the rotating shaft. A rotating seat is sleeved on the outer side of the internal meshing spur gear transmission mechanism. Two right-angle plates are provided on the top of the rotating seat. Stirring blades are respectively provided on one side of the two right-angle plates. Several curved rods are staggered on both sides of the stirring blades. Cleaning plates and scrapers for cleaning the surface of the ultrafiltration membrane and for scraping off the adhering substances on the inner wall of the modified mixing tank are respectively provided on both sides of the stirring blades. A tilting assembly is provided on the stirring blades.

[0006] Preferably, the flipping assembly includes a driving bevel gear mounted on the top of the rotating shaft, two driven bevel gears are provided on the driving bevel gear, and a first rotating rod passing through the stirring blade is provided on one side of each of the two driven bevel gears. A plurality of second rotating rods are staggered on the stirring blade, and each of the plurality of second rotating rods is provided with a flipping blade. A belt pulley transmission mechanism is provided between adjacent second rotating rods.

[0007] Preferably, the diffusion component includes an air inlet installed on the modified mixing tank, one end of the air inlet is provided with a protective net, and the other end of the air inlet is connected to an air supply pipe, the other end of the air supply pipe is connected to a fan installed outside the modified mixing tank.

[0008] Preferably, the powder feeding assembly includes a hopper for holding papain, a weighing device at the bottom of the hopper, and an auger elevator for feeding the powder. The other end of the auger elevator is provided with a feed pipe for injecting papain into the cavity of the modified mixing tank.

[0009] Preferably, the liquid feeding assembly includes an injection pipe for injecting a protein solution into the inner cavity of the modified mixing tank, and a flow meter and a valve are sequentially arranged on the injection pipe.

[0010] Preferably, the liquid feeding assembly includes an injection pipe for injecting a protein solution into the cavity of the modified mixing tank, and a flow meter and a valve are sequentially installed on the injection pipe.

[0011] The bottom of the two scrapers is provided with a circular rail installed at the bottom of the inner cavity of the modified mixing tank.

[0012] Preferably, the top of the modified mixing tank is provided with a plurality of ventilation holes, and the ultrafiltration membrane is provided with a drive mechanism installed on the modified mixing tank.

[0013] Preferably, the first rotating rod and the second rotating rod are connected by a belt pulley transmission mechanism.

[0014] By employing the above technical solution, the present invention provides a soybean protein isolate modification device, which has at least the following beneficial effects:

[0015] 1. This invention, by incorporating a stirring and cleaning component, cleans the surface of the ultrafiltration membrane and the inner wall of the modified mixing tank during solution stirring. This helps prevent impurities from clogging the ultrafiltration membrane surface, thus affecting the extraction efficiency of soy protein isolate. It also prevents the presence of adhering substances on the inner wall of the modified mixing tank, which could lead to insufficient mixing between the protein solution and papain, thereby affecting the modification effect of the soy protein isolate. Furthermore, the use of a crank and a flipping component, with different installation of the flipping blades causing some blades to rotate clockwise and others counterclockwise during synchronous rotation, allows for different stirring methods at different locations in the solution. This improves material stirring efficiency and avoids long stirring cycles and insufficient stirring. Simultaneously, the flipping blades on the solution surface can move papain floating at the top of the solution into the protein solution, further accelerating solid-liquid mixing efficiency.

[0016] 2. By setting up an air-expanding component, the present invention uses wind power to make the injected papain dispersed and contact the protein solution, thereby increasing the contact area between the papain and the protein solution, further accelerating the mixing efficiency of solid and liquid raw materials, and preventing the papain from forming clumps when injecting solid and liquid raw materials simultaneously, thus ensuring sufficient mixing between the papain and the protein solution.

[0017] 3. The present invention uses a sloping groove to guide the dispersed injection of papain into the protein solution. Combined with the use of baffles, this helps to prevent direct contact between papain and the ultrafiltration membrane pores, thus preventing clogging of the ultrafiltration membrane pores and affecting the extraction efficiency of soy protein isolate. Attached Figure Description

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the modified mixing tank of the present invention;

[0021] Figure 3 This is a schematic diagram of the stirring and cleaning component structure of the present invention;

[0022] Figure 4 This is an enlarged structural diagram of point A in the present invention;

[0023] Figure 5 This is a schematic diagram of the flip component structure of the present invention;

[0024] Figure 6 This is a cross-sectional front view of the modified mixing tank of the present invention;

[0025] Figure 7 This is a schematic diagram of the diffusion component structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the powder feeding assembly structure of the present invention;

[0027] Figure 9 This is a schematic diagram of the liquid feeding assembly structure of the present invention;

[0028] Figure 10 This is a schematic diagram illustrating the working principle of the present invention.

[0029] In the diagram: 1. Modified mixing tank; 2. Ultrafiltration membrane; 3. Stirring and cleaning assembly; 4. Baffle; 5. Inclined trough; 6. Diffusion assembly; 7. Powder feeding assembly; 8. Liquid feeding assembly; 11. Ventilation hole; 21. Drive mechanism; 31. Drive motor; 32. Rotating shaft; 33. Internal meshing spur gear transmission mechanism; 34. Rotating seat; 35. Right-angle plate; 36. Stirring blade; 37. Crankshaft; 38. Cleaning plate; 39. Scraper; 310. Tilting assembly Components; 61. Air inlet; 62. Protective net; 63. Air duct; 64. Fan; 71. Discharge hopper; 72. Weighing device; 73. Screw hoist; 74. Feed pipe; 81. Liquid injection pipe; 82. Flow meter; 83. Valve; 391. Circular rail; 3101. Driving bevel gear; 3102. Driven bevel gear; 3103. First rotating rod; 3104. Second rotating rod; 3105. Tilting blade; 3106. Belt pulley drive mechanism. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Figures 1-10One embodiment of the present invention: a soy protein isolate modification device includes a modification mixing tank 1 for holding papain and a protein solution. The inner cavity of the tank is equipped with an ultrafiltration membrane 2 for extracting soy protein isolate. A stirring and cleaning component 3 is provided on the surface of the ultrafiltration membrane 2. The stirring and cleaning component 3 is used to clean impurities accumulated on the surface of the ultrafiltration membrane 2 and substances adhering to the inner wall of the modification mixing tank 1, thereby improving the efficiency of soy protein isolate extraction by the ultrafiltration membrane 2 and the modification effect of the soy protein isolate. It also facilitates subsequent cleaning of the inner wall of the modification mixing tank 1, and allows for multi-directional and multi-position stirring and mixing of the protein solution and papain. This combination ensures thorough mixing between the protein solution and papain, thereby guaranteeing the modification effect of soy protein isolate. Furthermore, a baffle 4 is provided on one side of the ultrafiltration membrane 2 to prevent powdered raw materials from contacting the filter pores of the ultrafiltration membrane 2. Combined with the inclined groove 5 on the modification mixing tank 1 and the diffusion assembly 6 installed on the modification mixing tank 1, the papain is dispersed along the inclined groove 5 and fully contacts the protein solution. This helps to prevent the dry powder papain from clumping together when simultaneously injected with the protein solution, thus ensuring thorough mixing between the papain and the protein solution.

[0033] Specifically, the principle of ultrafiltration is based on the molecular weight and shape of soybean protein, as well as the compatibility of the membrane with soybean protein. Membrane materials and membranes with different molecular weight cutoffs are selected to ultrafilter and purify the soybean protein extract, removing non-retained components to achieve a standard separated soybean protein solution. The purified soybean protein extract is then concentrated to the required concentration through ultrafiltration and discharged, spray-dried into powdered soybean protein isolate. Therefore, when the pore size of ultrafiltration membrane 2 is 10 kDa, the ultrafiltration pressure is 0.5 MPa, and the pH value is maintained at around 7.0 after alkaline extraction and acid precipitation, the separation rate of soybean protein can be guaranteed to be 95.2%, and the purity to be 87.3%.

[0034] Reference Figures 3-5As shown, the stirring and cleaning assembly 3 includes a drive motor 31 installed at the bottom of the modified mixing tank 1. A rotating shaft 32 is mounted on the top of the drive motor 31, and an internal meshing spur gear transmission mechanism 33 is mounted on the top of the rotating shaft 32 to drive the rotating seat 34 to rotate. Two right-angle plates 35 then drive the stirring blades 36 to rotate. Several curved rods 37 are staggered on both sides of the stirring blades 36, and cleaning plates 38 and scrapers 39 are mounted on the curved rods 37. This allows for the simultaneous cleaning of impurities accumulated on the surface of the ultrafiltration membrane 2 and the inner wall of the modified mixing tank 1 during the stirring of the papain and protein solutions. The adhering substances are quickly scraped off and cleaned, which helps to ensure the flowability of the ultrafiltration membrane 2 pores. This prevents the extraction efficiency of soy protein isolate from being affected later. At the same time, it also ensures the cleanliness of the inner wall of the modified mixing tank 1, which in turn helps to ensure the sufficient mixing between papain and protein solution, thus ensuring the modification effect of soy protein isolate. It also helps to reduce the labor intensity of cleaning the modified mixing tank 1 later. In addition, with the flipping component 310 installed on the stirring blade 36, other parts of the solution can be stirred, thereby accelerating the mixing speed of solid and liquid raw materials.

[0035] Specifically, the internal meshing spur gear transmission mechanism 33 consists of an internal gear, a transmission gear, a rotating shaft, and an output gear. This is existing technology and will not be described in detail. Furthermore, a circular rail 391 is provided at the bottom of the two scrapers 39, which can limit and guide the rotation of the scrapers 39.

[0036] Reference Figure 5 As shown, the flipping assembly 310 includes an active bevel gear 3101 mounted on the top of the rotating shaft 32, which is driven by a drive motor 31 and drives two driven bevel gears 3102 to rotate. In conjunction with the first rotating rod 3103, the second rotating rod 3104, and multiple belt pulley transmission mechanisms 3106, it can drive the flipping blades 3105 mounted between the stirring blade 36, the cleaning plate 38, and the scraper 39 to rotate. Since the adjacent flipping blades 3105 are installed in opposite directions, the adjacent flipping blades 3105 are in a forward and reverse rotation state. The forward rotating flipping blades 3105 concentrate the solution towards the center, and the reverse rotating flipping blades 3105 cause the water to spread outwards. At the same time, the flipping blades 3105 located on the solution surface can flip the papain floating on the solution surface into the solution, thereby facilitating the rapid dissolution of papain into the protein solution. In addition, with the use of the crank rod 37, different methods of stirring and mixing can be performed at different positions of the solution, which helps to ensure the mixing effect of papain and protein solution.

[0037] Specifically, this device is driven by a drive motor 31 to drive components such as the stirring blade 36, cleaning plate 38, scraper 39 and tilting blade 3105, which is beneficial for the later inspection and maintenance of the device.

[0038] Example 2

[0039] Based on Example 1, referring to Figure 6 As shown, the diffusion assembly 6 includes an air diffuser 61 installed on the modified mixing tank 1 to expand the airflow direction. The other end of the air diffuser 61 is connected to a fan 64 installed outside the modified mixing tank 1 through an air supply pipe 63. The fan 64 can generate a stream of air to cause the dry powder papain to disperse and come into contact with the protein solution, thereby helping to avoid the papain from forming clumps and thus ensuring sufficient mixing between the papain and the protein solution. In addition, a protective net 62 is provided at the outlet of the air diffuser 61. The protective net 62 is used to prevent the dry powder papain from passing through the fan 64 inside the air diffuser 61 and causing damage to the fan 64.

[0040] Reference Figure 1 , Figure 8 , Figure 9 and Figure 10 As shown, the top of the modified mixing tank 1 is equipped with a powder feeding component 7 and a liquid feeding component 8 for injecting papain and protein solution. With the use of the controller, the device can automatically weigh and feed according to the equipment ratio value, which helps to reduce the operational error caused by manual weighing and thus helps to ensure the modification effect of soy protein isolate.

[0041] Reference Figure 8 The powder feeding component 7 includes a hopper 71 for holding papain, and an auger elevator 73 for conveying papain is installed on the hopper 71. The powder is automatically fed into the modified mixing tank 1 through the feed pipe 74. At the same time, a weighing device 72 installed at the bottom of the hopper 71 can measure the weight of the powder feeding component 7 in real time and transmit the signal to the controller. The difference between the two weights is the weight of the added papain.

[0042] Reference Figure 9 The liquid feeding assembly 8 includes an injection pipe 81 for injecting protein solution into the inner cavity of the modified mixing tank 1. A flow meter 82 and a valve 83 are sequentially installed on the injection pipe 81. The flow meter 82 is used to record the amount of protein solution injected and transmit the signal to the controller. The controller then injects a corresponding mass of protein solution according to the amount of papain injected. When the two meet the set ratio, the valve 83 and the auger elevator 73 are automatically closed.

[0043] Specifically, the other end of the injection pipe 81 is connected to an output pump, which inputs the protein solution into the modified mixing tank 1.

[0044] Working Principle: When using this device to modify soy protein isolate, the controller starts the auger elevator 73 and valve 83. The auger elevator 73 extracts papain from the discharge hopper 71 and injects it into the modification mixing tank 1 through the feed pipe 74. The weighing device 72 weighs the entire weight of the powder feeding assembly 7 in real time and transmits the signal to the controller. Before the papain falls into the modification mixing tank 1, the controller starts the blower 64, which provides airflow to the inclined trough 5 through the air supply pipe 63 and the air diffuser 61, causing the papain to disperse and mix with the protein solution. Then, the pump injects the protein solution into the modification mixing tank 1 through the injection pipe 81, and the flow meter 82 records the flow rate of the protein solution and transmits the signal to the controller. When the mass of the two meets the preset ratio, the controller automatically closes the auger elevator 73 and valve 83. During the process, the drive motor 31 is started synchronously, which drives the rotating shaft 32 to rotate. The rotating shaft 32 drives the rotating seat 34 to rotate through the internal meshing spur gear transmission mechanism 33. The rotating seat 34 drives the stirring blade 36 to rotate through the right-angle plate 35. The stirring blade 36 drives the cleaning plate 38 and scraper 39 to rotate through the crank rod 37. Thus, when stirring and mixing raw materials, the impurities retained on the surface of the ultrafiltration membrane 2 and the adhering substances on the inner wall of the modified mixing tank 1 are cleaned. In addition, while the rotating shaft 32 drives the internal meshing spur gear transmission mechanism 33 to work, it can drive the active bevel gear 3101 to rotate. The active bevel gear 3101 drives the driven bevel gear 3102 to rotate. The driven bevel gear 3102 drives the first rotating rod 3103 to rotate. Then, through the second rotating rod 3104 and the belt pulley transmission mechanism 3106, it can drive the tilting blade 3105 to rotate. Thus, the solution is stirred and mixed in different directions at different locations.

[0045] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, the present invention will not explain the control method and circuit connection in detail.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present utility have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present utility, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soybean protein isolate modification device, comprising a modification mixing tank (1), wherein an ultrafiltration membrane (2) is disposed in the inner cavity of the modification mixing tank (1), characterized in that: The surface of the ultrafiltration membrane (2) is provided with a stirring and cleaning component (3), and a baffle (4) is provided on one side of the ultrafiltration membrane (2) to prevent powder raw materials from contacting the filter pores of the ultrafiltration membrane (2). The modified mixing tank (1) is provided with a sloping groove (5), and a diffusion component (6) is provided on one side of the sloping groove (5) to diffuse the contact area between papain and protein solution. The top of the modified mixing tank (1) is provided with a powder feeding component (7) and a liquid feeding component (8) for injecting solid and liquid raw materials. The stirring and cleaning assembly (3) includes a drive motor (31) installed at the bottom of the modified mixing tank (1). The top of the drive motor (31) is provided with a rotating shaft (32). The top of the rotating shaft (32) is provided with an internal meshing spur gear transmission mechanism (33). A rotating seat (34) is sleeved on the outside of the internal meshing spur gear transmission mechanism (33). The top of the rotating seat (34) is provided with two right-angle plates (35). A stirring blade (36) is provided on one side of each of the two right-angle plates (35). Several curved rods (37) are staggered on both sides of the stirring blade (36). A cleaning plate (38) and a scraper (39) are respectively installed on the curved rods (37) for cleaning the surface of the ultrafiltration membrane (2) and for scraping off the adhering substances on the inner wall of the modified mixing tank (1). A flipping assembly (310) is provided on the stirring blade (36).

2. The soybean protein isolate modification equipment according to claim 1, characterized in that: The flipping assembly (310) includes a driving bevel gear (3101) mounted on the top of the rotating shaft (32). The driving bevel gear (3101) is provided with two driven bevel gears (3102). Each of the two driven bevel gears (3102) has a first rotating rod (3103) passing through the stirring blade (36) on one side. The stirring blade (36) is provided with a plurality of second rotating rods (3104) arranged alternately. Each of the plurality of second rotating rods (3104) is provided with a flipping blade (3105). A belt pulley transmission mechanism (3106) is provided between adjacent second rotating rods (3104).

3. The soybean protein isolate modification equipment according to claim 1, characterized in that: The diffusion assembly (6) includes an air inlet (61) installed on the modified mixing tank (1). One end of the air inlet (61) is provided with a protective net (62), and the other end of the air inlet (61) is connected to an air supply pipe (63). The other end of the air supply pipe (63) is connected to a fan (64) installed outside the modified mixing tank (1).

4. The soybean protein isolate modification equipment according to claim 1, characterized in that: The powder feeding assembly (7) includes a feeding hopper (71) for holding papain, a weighing device (72) is provided at the bottom of the feeding hopper (71), and an auger elevator (73) for feeding is provided on the feeding hopper (71). The other end of the auger elevator (73) is provided with a feed pipe (74) for injecting papain into the inner cavity of the modified mixing tank (1).

5. The soybean protein isolate modification equipment according to claim 1, characterized in that: The liquid feeding assembly (8) includes an injection pipe (81) for injecting a protein solution into the cavity of the modified mixing tank (1), and a flow meter (82) and a valve (83) are sequentially installed on the injection pipe (81).

6. The soybean protein isolate modification equipment according to claim 1, characterized in that: The bottom of the two scrapers (39) is provided with a circular rail (391) installed at the bottom of the inner cavity of the modified mixing tank (1).

7. The soybean protein isolate modification equipment according to claim 1, characterized in that: The top of the modified mixing tank (1) is provided with several ventilation holes (11), and the ultrafiltration membrane (2) is provided with a drive mechanism (21) installed on the modified mixing tank (1).

8. The soybean protein isolate modification equipment according to claim 2, characterized in that: The first rotating rod (3103) and the second rotating rod (3104) are connected by a belt pulley transmission mechanism (3106).

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