Industrial preparation system of sodium caseinate

Abstract

The invention provides a sodium caseinate industrial preparation system which comprises one or more acid precipitation tanks and one or more alkali dissolution tanks, and the acid precipitation tanks are connected with the alkali dissolution tanks. The acid precipitation tank comprises a tank body, a stirring trap, a stirring motor and a stirring main shaft, the stirring trap is arranged in the tank body and connected with the stirring main shaft, the stirring motor is connected with the stirring main shaft, and the stirring motor can drive the stirring trap and the stirring main shaft to rotate. The stirring trap comprises a deformable trapping net and a cambered surface trapping net, the deformable trapping net extends in the radial direction and the axial direction of the tank body, and the cambered surface trapping net extends in the circumferential direction and the axial direction of the tank body. The deformable trapping net comprises a plurality of trapping net units, a plurality of rotating parts and a trapping unit support, the trapping net units are rotationally connected to the trapping unit support through the rotating parts, and rotating shafts of the rotating parts extend in the axial direction of the tank body or in the direction parallel to the axial direction, so that the liquid facing area of the deformable trapping net can be changed when the trapping net units rotate around the rotating shafts.

Description

Technical Field

[0001] The present application relates to the technical field of dairy product processing, and in particular to an industrialized preparation system of sodium caseinate. Background Art

[0002] Sodium caseinate is a water-soluble protein derivative made from casein through alkaline treatment. Its molecular structure forms a stable complex through the binding of sodium ions to the phosphate groups of casein. As a functional product of natural milk protein, sodium caseinate combines the nutritional properties of casein with excellent processing properties, making it widely applicable in the food, pharmaceutical, and industrial sectors. Its high water solubility, emulsification stability, foaming properties, and film-forming properties make it irreplaceable in the production and processing of dairy products (for example, coffee creamer and ice cream), meat products (for improving texture and increasing water retention), beverages (for protein fortification and stability), and nutritional supplements. Furthermore, sodium caseinate is rich in essential amino acids and has high bioavailability, meeting the protein needs of specific populations (such as athletes and clinical practitioners). This meets the modern food industry's dual demands for clean label (minimizing additives) and functional food ingredients (providing key functional components to foods).

[0003] The traditional production process of sodium caseinate mainly uses qula, a by-product formed when making ghee, as raw material. The sodium caseinate products produced by this process have poor texture, bad taste, high ash content (inorganic components), low protein content, and large fluctuations in product indicators between batches.

[0004] Existing production equipment generally uses open-type crushing, acid precipitation, water washing, and alkali dissolution equipment. Production materials cannot be fully sealed and piped at each stage of the production process, resulting in high risks of microbial growth, foreign matter introduction, and chemical contamination. Using existing production equipment, casein micelles after acid precipitation need to be repeatedly transferred between multiple tanks, then washed and drained using methods such as decanters and vibrating screens before alkali dissolution. This process is complex, difficult to operate, and difficult to standardize. Furthermore, during the aforementioned processing, casein may undergo partial denaturation of its protein structure during acid precipitation, water washing, and neutralization. This can inhibit the functional properties of sodium caseinate in acidic, alkaline, and high-temperature environments, thereby affecting the solubility and emulsification efficiency of the final product. Current production technology solutions cannot meet the market demand for high-quality sodium caseinate, restricting its innovative application in high-end food products and limiting the development of the casein industry. Therefore, improving sodium caseinate production equipment to address at least one of the above-mentioned deficiencies in the existing technology and improve the production quality of sodium caseinate has become an important direction for current industry technology upgrades. Summary of the Invention

[0005] This application is made in view of the state of the prior art described above. The purpose of this application is to provide an industrialized preparation system for sodium caseinate, which can utilize a dedicated acid precipitation tank structure to achieve multiple production steps such as stirring and mixing of casein materials, precipitation and capture of casein micelles, water replenishment, washing and filtration, and preliminary crushing, thereby reducing the frequency of casein material transfer and improving the overall production efficiency of sodium caseinate.

[0006] The present application provides an industrial preparation system for sodium caseinate, which includes one or more acid precipitation tanks and one or more alkali dissolution tanks.

[0007] The acid precipitation tank is connected to the alkali dissolution tank,

[0008] The acid precipitation tank includes a tank body, a stirring collector, a stirring motor and a stirring main shaft. The stirring collector is arranged inside the tank body, the stirring collector is connected to the stirring main shaft, and the stirring motor is connected to the stirring main shaft. The stirring motor can drive the stirring collector and the stirring main shaft to rotate.

[0009] The stirring collector includes a deformable collecting net and a curved collecting net, wherein the deformable collecting net extends in the radial direction and the axial direction of the tank body, and the curved collecting net extends in the circumferential direction and the axial direction of the tank body.

[0010] The deformable capture net includes a plurality of capture net units, a plurality of rotating parts, and a capture unit bracket. The capture net units are rotatably connected to the capture unit bracket via the rotating parts. The rotating shaft of the rotating part extends along the axial direction of the tank body or in a direction parallel to the axial direction, so that the plurality of capture net units can change the liquid-facing area of ​​the deformable capture net when rotating around the rotating shaft.

[0011] The plurality of capturing net units are arranged in a matrix on both sides of the stirring main shaft.

[0012] In at least one possible embodiment, the stirring collector includes two arc-surface collecting nets.

[0013] The two arc surface capture nets are respectively connected to the radial side edges of the deformable capture net, and the central angle of the inner arc surfaces of the two arc surface capture nets is less than 180 degrees.

[0014] The circumferential extension directions of the two arcuate capture nets relative to the deformable capture net are both counterclockwise; or, the circumferential extension directions of the two arcuate capture nets relative to the deformable capture net are both clockwise.

[0015] In at least one possible embodiment, the rotation range of the capture net unit is limited to one side of the main plane of the capture unit bracket, and the side is close to the arcuate capture net adjacent to the capture net unit.

[0016] The rotation range of the plurality of capturing net units on one side of the stirring main shaft and the rotation range of the plurality of capturing net units on the other side of the stirring main shaft are respectively limited to two opposite sides of the main plane of the capturing unit bracket.

[0017] In at least one possible embodiment, the stirring collector further includes a collector frame, and the collector frame is connected to the stirring main shaft and the two arc-surface collecting nets.

[0018] In at least one possible embodiment, the plurality of capture net units rotate within a range of 0 to 90 degrees from a perpendicular plane to a parallel plane of the capture unit support.

[0019] In at least one possible embodiment, the mesh of the capture net unit is a square hole, and the side length of the square hole is 4 to 8 mm.

[0020] The deformable collecting net is provided with 4 to 8 rows of collecting net units.

[0021] The deformable capturing net is provided with 4 to 6 rows of capturing net units.

[0022] In at least one possible embodiment, the industrial preparation system of sodium caseinate further includes a water supply unit, a powder silo, and a mixer, wherein the water supply unit and the powder silo are both connected to the mixer to mix the casein powder with water in the mixer.

[0023] In at least one possible embodiment, the industrial preparation system of sodium caseinate further includes a by-product collection tank and a temporary storage tank.

[0024] The by-product collection tank is connected to the acid precipitation tank and is used to collect the clear liquid formed after the casein is captured in the acid precipitation tank.

[0025] The temporary storage tank is connected to the alkali dissolving tank and is used to collect the sodium caseinate solution formed in the alkali dissolving tank.

[0026] In at least one possible embodiment, the industrial preparation system of sodium caseinate further includes a colloid mill and a sterilizer.

[0027] The colloid mill is arranged between the acid precipitation tank and the alkali dissolution tank and is used to break casein micelles.

[0028] The sterilizer is arranged between the alkali dissolving tank and the temporary storage tank, and is used for sterilizing the sodium caseinate solution.

[0029] In at least one possible embodiment, the industrial preparation system of sodium caseinate further includes an acid tank and an alkali tank.

[0030] The acid liquid tank is connected to the acid precipitation tank and is used to pass acid liquid into the acid precipitation tank.

[0031] The alkali liquid tank is connected to the alkali dissolving tank and is used for introducing alkali liquid into the alkali dissolving tank.

[0032] The sodium caseinate industrial production system provided by the present application can realize multiple production steps such as stirring and mixing of casein materials, precipitation and capture of casein micelles, water replenishment, washing and filtration, and preliminary crushing in a single acid precipitation tank, which can effectively save the time of transferring materials between multiple casein processing devices compared with the existing technology. The acid precipitation tank has low operating difficulty when switching between different processing steps or processing functions, and is easy to achieve standardization of operating procedures. The production efficiency of the sodium caseinate industrial production system using the above-mentioned acid precipitation tank is significantly improved compared with the existing technology, and the product yield is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The present invention is a simplified structural diagram of an industrialized sodium caseinate preparation system according to one embodiment of the present application.

[0034] Figure 2 1 is a simplified structural diagram of a heating portion of a water supply unit according to one embodiment of the present application.

[0035] Figure 3 This is a schematic diagram of the first partial structure of a system for industrial preparation of sodium caseinate according to one embodiment of the present application.

[0036] Figure 4 This is a schematic diagram of a second partial structure of a system for industrial preparation of sodium caseinate according to one embodiment of the present application.

[0037] Figure 5 This is a third partial structural diagram of the industrialized preparation system of sodium caseinate according to one embodiment of the present application.

[0038] Figure 6 It is a structural schematic diagram of an acid precipitation tank according to one embodiment of the present application.

[0039] Figure 7 It is a top view of the internal structure of the acid precipitation tank according to one embodiment of the present application.

[0040] Figure 8 It is a schematic structural diagram of a stirring collector according to one embodiment of the present application.

[0041] Figure 9 Schematic diagram of the structure of a deformable capture net according to one embodiment of the present application.

[0042] Figure 10A schematic diagram of a deformable capture net according to an embodiment of the present application.

[0043] Figure 11 A schematic diagram of another form of a deformable capture net according to one embodiment of the present application

[0044] Description of Reference Numerals

[0045] 10 Water supply unit

[0046] 11 Hot water tank

[0047] 12 Heating unit

[0048] 20 Powder Bin

[0049] 21 First Powder Warehouse

[0050] 22 Second powder bin

[0051] 23 Third powder warehouse

[0052] 30 Mixer

[0053] 31 First Mixer

[0054] 32 Second mixer

[0055] 33 Third mixer

[0056] 40 Acid sedimentation tank

[0057] 41 tank

[0058] 42 Stirring collector

[0059] 421 Deformable Capture Net

[0060] 4211 Capture Net Unit

[0061] 4212 Rotating part

[0062] 4213 Capture Unit Bracket

[0063] 422 curved surface capture net

[0064] 423 Catcher Frame

[0065] 43 stirring motor

[0066] 44 stirring spindle

[0067] 45 weighing sensor

[0068] 46 Breathing Cap

[0069] 401 First Acid Sedimentation Tank

[0070] 402 Second Acid Sedimentation Tank

[0071] 403 The third acid sedimentation tank

[0072] 51 Acid Tank

[0073] 52 Lye Tank

[0074] 60 By-product collection tank

[0075] 70 Alkali dissolving tank

[0076] 71 First alkali dissolving tank

[0077] 72 Second alkali dissolving tank

[0078] 80 sterilizer

[0079] 90 Temporary Storage Tank

[0080] 91 First temporary storage tank

[0081] 92 Second temporary storage tank DETAILED DESCRIPTION

[0082] The following describes exemplary embodiments of the present application with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible embodiments of the present application, nor to limit the scope of the present application.

[0083] The embodiment of the present application provides an industrialized preparation system for sodium caseinate (hereinafter sometimes referred to as "preparation system"), such as Figure 1 As shown, the preparation system may include a water supply unit 10 , a powder silo 20 , a mixer 30 , an acid precipitation tank 40 , an acid solution tank 51 , an alkali solution tank 52 and an alkali dissolution tank 70 .

[0084] like Figure 1 As shown, the water supply unit 10 and the powder bin 20 can be connected to the mixer 30 for mixing the casein powder with water in the mixer 30 to form a casein solution. Preferably, the preparation system can use membrane separated casein powder as the casein raw material, that is, the powder bin 20 can be filled with membrane separated casein. Figure 1 and Figure 2 As shown, the water supply unit 10 may include a hot water tank 11 for maintaining and temporarily storing hot water, and a heating unit 12 for heating the water. The heating unit 12 may be connected to the hot water tank 11. It is understood that all or part of the water supply unit 10 may be a unified hot water supply unit for the production plant. In other words, in some production scenarios, the preparation system does not require a separate water supply unit. The temperature of the hot water may be 50 to 55 degrees Celsius.

[0085] The mixer 30 may include a mixing paddle for stirring the casein powder and water. Preferably, the mixing paddle has a rotational speed of 2500 to 3500 revolutions per minute, and the mixing time may be 30 to 60 minutes. The mixer 30 (or a pipeline connected thereto) may also be provided with a flow meter to calculate the amount of material added.

[0086] Preferably, Figure 3 As shown, the preparation system can be provided with multiple powder silos 20 and mixers 30 to improve the efficiency of material mixing and the multiple mixers can operate alternately so that the preparation system can achieve continuous operation. Exemplarily, the preparation system can be provided with a first powder silo 21, a second powder silo 22 and a third powder silo 23 and a first mixer 31, a second mixer 32 and a third mixer 33. The first powder silo 21, the second powder silo 22 and the third powder silo 23 can be respectively provided and connected to the first mixer 31, the second mixer 32 and the third mixer 33. It can be understood that the powder silo 20 and the mixer 30 can be connected by pipes, hoses, etc. Figure 1 and Figure 3 The connection structure between each powder bin and each mixer is omitted. The setting height of the powder bin 20 can be higher than the setting height of the mixer 30, so that the casein powder can enter the mixer 30 under the action of gravity.

[0087] It is understandable that in actual production, the preparation system can also directly use the casein liquid processed by external equipment. In this case, the preparation system does not need to be equipped with the powder bin 20 and the mixer 30.

[0088] Further, such as Figure 6 、 Figure 7 and Figure 8 As shown, the acid precipitation tank 40 may include a tank body 41, a stirring collector 42, a stirring motor 43, a stirring spindle 44, a weighing sensor 45 and a breathing cap 46. The stirring collector 42 and the stirring spindle 44 may be arranged inside the tank body 41, and the stirring motor 43 may be arranged outside (upper) of the tank body 41. The stirring collector 42 may be connected to the stirring spindle 44, and the stirring motor 43 may be connected to the stirring spindle 44. When the stirring motor 43 drives the stirring spindle 44 to rotate, the stirring collector 42 may rotate together with the stirring spindle 44. In particular, the direction of rotation of the output shaft of the stirring motor in the present application can be changed at different production stages (the direction of rotation of the stirring spindle 44 connected to the stirring motor 43 will naturally change accordingly), that is, the direction of rotation of the stirring collector 42 can be changed. Exemplarily, in the acid precipitation, capture and crushing steps carried out sequentially in the acid precipitation tank 40, the direction of rotation of the stirring motor 43 may change as the steps are switched. For example (with Figure 7For example, in the acid precipitation step, the stirring collector 42 can rotate counterclockwise; in the collection step, the stirring collector 42 can rotate clockwise; in the crushing step, the stirring collector 42 can rotate counterclockwise (for a detailed description of each step, please refer to the workflow described later).

[0089] Preferably, the effective volume of the acid precipitation tank 40 may be 3000 to 5000 liters.

[0090] Preferably, the stirring motor 43 may be a variable frequency motor, and its maximum rated power may be 80 to 150 kilowatts.

[0091] like Figure 7 and Figure 8 As shown, the agitation collector 42 may include a deformable collection net 421 and a curved collection net 422. The deformable collection net 421 extends radially and axially along the tank body 41, while the curved collection net 422 extends circumferentially and axially along the tank body 41. It will be understood that the extension direction herein refers to the overall extension direction of the deformable collection net 421 or the curved collection net 422. That is, the deformable collection net 421 may be a rectangular collection net positioned at the centerline of the tank body 41, while the curved collection net 422 may be a cylindrical collection net positioned within the tank body 41.

[0092] Preferably, the diameter of the stirring collector 42 may be 798 to 1072 mm.

[0093] like Figure 9 As shown, the deformable capture net 421 may include a plurality of capture net units 4211, a plurality of rotating parts 4212, and a capture unit bracket 4213. The capture net units 4211 may be rotatably connected to the capture unit bracket 4213 via the rotating parts 4212. The rotating shaft of the rotating part 4212 may extend along the axial direction or parallel to the axial direction of the stirring main shaft 44. In particular, the rotating part 4212 may be disposed on a vertical side of the capture net unit 4211 (with reference to the working posture of the stirring collector), so that the capture net unit 4211 may rotate around a vertical support rod of the capture unit bracket 4213 (i.e., around the axial direction of the tank body 41), thereby changing the liquid-facing area (effective capture area) of the deformable capture net 421.

[0094] Preferably, Figure 9 As shown, a collection net unit 4211 can be rotatably connected to the collection unit bracket 4213 through multiple rotating parts 4212, making the connection of the collection net unit 4211 more reliable. The interval between two adjacent rotating parts 4212 can be 120 to 260 mm.

[0095] like Figure 8 and Figure 9As shown, multiple capture net units 4211 can be arranged in a matrix on both sides of the stirring main shaft 44. That is, the capture unit bracket 4213 can include multiple parallel vertical support rods, which can be connected by transverse support rods. Each vertical support rod can connect multiple capture net units 4211. Preferably, the spacing between each vertical support rod can be 113 to 248 mm.

[0096] Preferably, the mesh of the capture net unit 4211 can be square, and the side length of the square hole can be 4 to 8 mm. The number of rows of the capture net units 4211 in the deformable capture net 421 can be 4 to 8 rows, and the number of columns of the capture net units 4211 in the deformable capture net 421 can be 4 to 6 columns.

[0097] Further, such as Figure 7 As shown in FIG8 , the stirring collector 42 may include two curved surface collection nets 422, which may be connected to the radially opposite sides of the deformable collection net 421. The central angle corresponding to the inner curved surfaces of the two curved surface collection nets 422 may be less than 180 degrees, that is, the two curved surface collection nets 422 do not overlap in the circumferential direction, so that a space for material to flow through is formed between the two curved surface collection nets 422.

[0098] Furthermore, the two curved capture nets 422 extend counterclockwise relative to the circumferential direction of the deformable capture net 421; alternatively, the two curved capture nets 422 extend clockwise relative to the circumferential direction of the deformable capture net 421. That is, the inner curved surfaces of the two curved capture nets 422 face each other, forming an axisymmetric structure centered on the stirring shaft 44. This structure is beneficial for ensuring the capture effect of casein micelles and improving the rotational stability of the stirring collector 42.

[0099] Further, such as Figure 7 、 Figure 8 and Figure 9 As shown, the rotation range of a capture net unit 4211 can be limited to one side of the main plane of the capture unit bracket 4213 (the main plane is the extension surface of the entire capture unit bracket, for example, the rectangular surface when the capture unit bracket is a rectangular bracket), and this side is close to the curved capture net 422 adjacent to the capture net unit 4211. In other words, the rotation range of the capture net unit 4211 is limited to the inner side of the curved capture net 422 adjacent to the capture net unit 4211.

[0100] Because the two curved capture nets 422 are arranged in an axisymmetric fashion, the rotational ranges of the multiple capture net units 4211 on one side of the agitation shaft 44 and the multiple capture net units 4211 on the other side of the agitation shaft 44 are correspondingly limited to opposite sides of the principal plane of the capture unit bracket 4213. It will be appreciated that this arrangement ensures that the liquid-facing angles of the respective capture net units 4211 and the curved capture net 422 are consistent or similar when the deformable capture net 421 rotates.

[0101] Preferably, the multiple capture net units 4211 rotate within a range of 0 to 90 degrees, from a plane perpendicular to the capture unit support 4213 to a plane parallel to the capture unit support 4213 (herein, the capture net units 4211 may be relatively located on one side of the rotating portion 4212 when parallel to the capture unit support 4213), and rotate only on one side of the capture unit support 4213. 0 degrees corresponds to the capture net units 4211 being parallel to the principal plane of the capture unit support 4213, and 90 degrees corresponds to the capture net units 4211 being perpendicular to the principal plane of the capture unit support 4213. For example, the spacing between the vertical struts of the capture unit support 4213 may be appropriately smaller than the horizontal width of the capture net units 4211 (based on the operating posture of the agitator collector) to restrict the rotation of the capture net units 4211, specifically limiting the capture net units to rotation parallel to the principal plane of the capture unit support and preventing them from rotating to the other side of the capture unit support. In another possible embodiment, the rotation range of the capturing net unit 4211 may also be limited by the rotating portion 4212 , that is, the maximum rotation angle of the rotating portion 4212 may be 90 degrees.

[0102] Furthermore, the stirring collector 42 may further include a collector frame 423, which can connect the stirring spindle 44 and the two curved collecting nets 422. The collector frame 423 can enhance the structural stability and load capacity of the stirring collector. The angle between the collector frame 423 and the deformable collecting net 421 can be 60 to 90 degrees.

[0103] Based on the structure of the above-mentioned deformable capturing net 421, as Figure 7 As shown, the deformable capture net 421 is Figure 7 In the perspective shown, when the deformable capture net 421 is rotated counterclockwise, the capture net unit 4211 can be rotated to a position perpendicular (or nearly perpendicular) to the main plane of the capture unit bracket 4213 under the action of fluid resistance. Figure 10 As shown, the deformable capturing net 421 has a small liquid-facing area (effective capturing area) and a small capturing ability for casein micelles (almost no capturing function).

[0104] exist Figure 7In the perspective shown, if the deformable capture net 421 is rotated clockwise, it can be understood that under the fluid resistance and the rotation limit condition of the capture net unit 4211, the capture net unit 4211 can be rotated to a position parallel to the main plane of the capture unit support 4213. At this time, as Figure 11 shown, the liquid-facing area (effective capture area) of the deformable capture net 421 is larger, and the capture ability for casein micelles is greater.

[0105] Exemplarily, in Figure 7 the perspective, when the deformable capture net 421 is rotated counterclockwise, the stirring capture device 42 mainly functions to stir the material. When the deformable capture net 421 is rotated counterclockwise at a high speed, the stirring capture device 42 can also form a preliminary dispersion and cutting of the casein micelles. When the deformable capture net 421 is rotated clockwise, the stirring capture device 42 mainly functions to capture the casein micelles. And, when the deformable capture net 421 is rotated clockwise, the arc-shaped capture net 422 can also function to capture the casein micelles. Furthermore, the acid precipitation tank 40 provided in this embodiment can respectively realize the functions of stirring the material, capturing the casein micelles, and preliminarily dispersing and cutting the casein micelles by adjusting the rotation direction and rotation speed of its stirring capture device 42.

[0106] Next, a possible working process of the acid precipitation tank will be briefly introduced (taking the perspective of Figure 7 as an example):

[0107] Acid precipitation step: As Figure 1 shown, the mixer 30 can be connected to the acid precipitation tank 40, and the casein liquid formed by stirring in the mixer 30 can enter the acid precipitation tank 40. The acid liquid tank 51 can be connected to the acid precipitation tank 40 to add a dilute hydrochloric acid solution (food grade) to the casein liquid. Preferably, after the casein liquid enters the acid precipitation tank 40, the temperature in the acid precipitation tank 40 can be maintained at 40 to 55 degrees Celsius, and the food grade dilute hydrochloric acid can be slowly added until the pH value of the casein liquid stabilizes at 4.1 to 4.6.

[0108] In the above process, the stirring capture device 42 can continuously rotate counterclockwise at a medium speed. When the precipitated casein particles gradually aggregate and increase to form casein micelles, the stirring capture device 42 can be adjusted to rotate counterclockwise at a low speed until the casein micelles are completely formed, and the acid precipitation step ends.

[0109] Capture Step: After the acid precipitation step, the stirring collector 42 can be adjusted to rotate clockwise at high speed. Each capture net unit 4211 in the deformable capture net 421 can be rotated 90 degrees counterclockwise by the rotating portion 4212 under the influence of resistance until it is aligned with or parallel to the capture unit bracket 4213. The curved capture net 422 and the deformable capture net 421 form a complete casein micelle precipitation and capture system. The casein micelle precipitate is intercepted by the stirring collector 42 under centrifugal force, gradually forming a filter layer. The capture process continues for a certain period of time, completing the first capture of the casein micelle precipitate.

[0110] Disintegration Step: After the casein micelle precipitate is captured, the speed of the stirring collector 42 can be maintained while the clear liquid in the acid precipitation tank 40 is drained. After the clear liquid is drained, RO water (deionized water) can be added to the acid precipitation tank 40 to the set level. The stirring collector 42 can be adjusted to rotate counterclockwise at high speed. The casein micelle precipitate can be dispersed and cut by the stirring collector 42 (particularly the capture unit bracket 4213) and evenly dispersed within the material system.

[0111] Preferably, after the acid precipitation step is completed, the capture step can be performed multiple times (particularly, three capture steps can be performed), and the acid precipitation tank can be filtered (ie, the clear liquid in the acid precipitation tank is discharged and then replenished with deionized water) between each capture step.

[0112] Preferably, in the acid precipitation step, an acid solution is added to the raw material until the pH is between 3.5 and 5.5; and the acid precipitation step is carried out at a temperature not exceeding 60°C.

[0113] Preferably, each capture step takes no longer than 10 minutes.

[0114] Preferably, each capture step is followed by a diafiltration step, wherein the diafiltration step comprises diafiltration of the product obtained from each capture step in a solvent. The diafiltration step can be performed at a temperature not exceeding 62°C.

[0115] Preferably, before the alkali dissolution step, a crushing step is further included, wherein the crushing step includes crushing the product obtained from the last capture. The alkali dissolution step can be carried out at a pH of 7-8; and the alkali dissolution time does not exceed 60 minutes.

[0116] Some preferred embodiments of the specific parameters of the acid precipitation tank are given below:

[0117] Example 1:

[0118] The effective volume of the acid precipitation tank 40 is 3000 liters;

[0119] The diameter of the stirring trap 42 is 798 mm;

[0120] The maximum rated power of the stirring motor 43 is 80 kilowatts;

[0121] The mesh of the arc surface capture net 422 and the deformable capture net 421 is a square hole structure with a side length of 4 mm;

[0122] The deformable capture net 421 is arranged in four groups in the longitudinal direction, and a rotating part 4212 is installed at every 260 mm interval on the longitudinal side frame;

[0123] The deformable capturing nets 421 are arranged in six groups in a horizontal direction; the rotation angle range of the rotating portion 4212 is 0-90 degrees.

[0124] The angle between the trap frame 423 and the deformable trapping net 421 is 60 degrees;

[0125] The spacing between the vertical struts of the capture unit bracket 4213 is 113 mm.

[0126] Example 2:

[0127] The effective volume of the acid precipitation tank 40 is 5000 liters;

[0128] The diameter of the stirring trap 42 is 1072 mm;

[0129] The maximum rated power of the stirring motor 43 is 150 kilowatts;

[0130] The mesh of the arc surface capture net 422 and the deformable capture net 421 is a square hole structure with a side length of 8 mm;

[0131] The deformable capture net 421 is arranged in 8 groups in the longitudinal direction, and a rotating part 4212 is installed at every 120 mm interval on the longitudinal side frame;

[0132] The deformable capture net 421 is arranged in four groups in a horizontal direction; the rotation angle range of the rotating part 4212 is 0-90 degrees;

[0133] The angle between the trap frame 423 and the deformable trapping net 421 is 90 degrees;

[0134] The spacing between the vertical supports of the capture unit bracket 4213 is 248 mm.

[0135] Example 3:

[0136] The effective volume of the acid precipitation tank 40 is 4000 liters;

[0137] The diameter of the stirring trap 42 is 824 mm;

[0138] The maximum rated power of the stirring motor 43 is 120 kilowatts;

[0139] The mesh of the arc surface capture net 422 and the deformable capture net 421 is a square hole structure with a side length of 6 mm;

[0140] The deformable capture net 421 is arranged in 6 groups in the longitudinal direction, and a rotating part 4212 is installed at every 190 mm interval on the longitudinal side frame;

[0141] The deformable capture net 421 is arranged in four groups in a horizontal direction; the rotation angle range of the rotating part 4212 is 0-90 degrees;

[0142] The angle between the trap frame 423 and the deformable trapping net 421 is 75 degrees;

[0143] The spacing between the vertical supports of the capture unit bracket 4213 is 186 mm.

[0144] Preferably, Figure 4 As shown, the preparation system can be provided with multiple acid precipitation tanks 40 to improve the efficiency of the acid precipitation operation. For example, in this embodiment, a first acid precipitation tank 401, a second acid precipitation tank 402 and a third acid precipitation tank 403 are provided.

[0145] It is understood that the acid precipitation tank 40 may also be provided with a temperature maintenance system to maintain the temperature in the acid precipitation tank 40 within a certain range.

[0146] The weighing sensor 45 of the acid precipitation tank 40 can be set outside the tank body 41 to weigh the total weight of the acid precipitation tank 40 and the materials therein. Combined with the weight of the acid precipitation tank 40 itself, the weight of the materials in the acid precipitation tank 40 and the amount of materials added each time can be calculated.

[0147] The breathing cap 46 (breathing valve) of the acid precipitation tank 40 can be arranged on the upper part of the tank body 41, which can have the functions of balancing the internal and external pressures of the tank body, preventing pollution and dust, etc.

[0148] After the casein micelles are initially fragmented in the acid precipitation tank 40, they can enter the colloid mill for thorough fragmentation. The thoroughly fragmented casein material can then be pumped into the alkaline dissolution tank 70 by a pump (particularly a screw pump). Preferably, the preparation system in this embodiment can also include a byproduct collection tank 60. The byproduct collection tank 60 can be connected to the acid precipitation tank 40 to collect the clear liquid in the acid precipitation tank 40, particularly the clear liquid formed after the first capture step in the acid precipitation tank 40.

[0149] Preferably, the preparation system in this embodiment may further include a sterilizer 80 and a temporary storage tank 90. ​​The sodium caseinate solution formed in the alkali dissolution tank 70 may be further pumped into the sterilizer 80 via a pump (particularly a screw pump) for sterilization, and then passed into the temporary storage tank 90 for heat preservation and storage.

[0150] Preferably, the sterilizer 80 can be a scraper sterilizer.

[0151] Preferably, Figure 5As shown, the preparation system can be provided with a plurality of temporary storage tanks 90 to increase the storage capacity of the sodium caseinate solution and to achieve storage and discharge of sodium caseinate through different temporary storage tanks 90. For example, in this embodiment, a first temporary storage tank 91 and a second temporary storage tank 92 are provided.

[0152] The sodium caseinate solution produced by the above preparation system can be further subjected to steps such as evaporation concentration and spray drying to form the final sodium caseinate product.

[0153] In some experimental control examples, the technical solution of the present application is compared with the traditional process and existing equipment solution. The sodium caseinate produced by the sodium caseinate industrial preparation system provided by the present embodiment is milky white in appearance, has a slight frankincense, good powder fluidity, ash ≤ 5%, protein ≥ 90%, fat ≤ 1.8%, and moisture ≤ 4%. Its various product indicators are better than the relevant requirements of the existing technical solution and GB1886.212-2016 (National Food Safety Standard Food Additive Sodium Caseinate). The entire production process of the preparation system provided by the technical solution provided by the present embodiment is completely sealed and pipelined, which greatly reduces the risks of microbial growth, foreign matter introduction, chemical pollution, etc. The acid precipitation tank provided by the present embodiment can realize multiple functions such as material stirring and mixing, casein micelle precipitation and capture, water replenishment, washing and filtering, and crushing, which avoids the casein micelles after acid precipitation from repeatedly switching between multiple material tanks. Its single batch production time is shortened by nearly 1 times, and the material yield (output rate) is improved by 6%. The preparation system of this embodiment enables a gentler production process, with high control precision in each process step, low degree of partial denaturation of the protein structure, and significantly improved solubility, emulsification efficiency, foaming properties, and film-forming properties. Specifically, sodium caseinate's wettability is increased by approximately 30%, emulsification by approximately 40%, foam stability by approximately 45%, and film-forming properties by approximately 30%.

[0154] The following briefly describes some of the beneficial effects of the above-mentioned embodiments of the present application.

[0155] (1) The sodium caseinate industrial production system provided by the embodiments of the present application can realize the production steps of stirring and mixing the casein material, precipitating and capturing the casein micelles, replenishing water, washing and filtering, and preliminary crushing in a single acid precipitation tank. Compared with the existing technology, it can effectively save the time of transferring materials between multiple casein processing devices. The operation difficulty of switching between various processing steps or processing functions in the acid precipitation tank is low, and it is easy to achieve standardization of the operation process.

[0156] (2) The sodium caseinate industrial production system provided by the embodiments of the present application has significantly improved production efficiency compared to the prior art, resulting in a higher product yield. Furthermore, the control precision of each processing step of the industrial production system is high. The sodium caseinate product produced using this production system has a lower degree of protein structure denaturation, and its solubility, emulsification efficiency, foaming properties, and film-forming properties are significantly improved.

[0157] (3) The industrialized preparation system of sodium caseinate provided by the embodiment of the present application can realize the sealing and piping of the main production process of sodium caseinate, so as to reduce the risks of microbial growth, foreign matter introduction, chemical contamination, etc. in the production process of sodium caseinate.

[0158] It is understood that in this application, when the number of parts or components is not specifically limited, the number may be one or more, and the term "plurality" herein refers to two or more. Where the number of parts or components is shown in the drawings and / or described in the specification as a specific number, such as two, three, or four, the specific number is generally illustrative and not restrictive, and may be understood as a plurality, i.e., two or more. However, this does not mean that this application excludes the case of one.

[0159] It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art may make various modifications and changes to the above embodiments based on the teachings of the present application without departing from the scope of the present application.

Claims

1. A sodium caseinate industrial preparation system, characterized in that: It includes one or more acid precipitation tanks (40) and one or more alkali dissolution tanks (70), The acid precipitation tank (40) is connected to the alkali dissolution tank (70), The acid precipitation tank (40) comprises a tank body (41), a stirring collector (42), a stirring motor (43) and a stirring main shaft (44); the stirring collector (42) is arranged inside the tank body (41); the stirring collector (42) is connected to the stirring main shaft (44); the stirring motor (43) is connected to the stirring main shaft (44); the stirring motor (43) can drive the stirring collector (42) and the stirring main shaft (44) to rotate. The stirring collector (42) comprises a deformable collecting net (421) and a cambered collecting net (422), wherein the deformable collecting net (421) extends in the radial direction and the axial direction of the tank body (41), and the cambered collecting net (422) extends in the circumferential direction and the axial direction of the tank body (41). The deformable capturing net (421) comprises a plurality of capturing net units (4211), a plurality of rotating parts (4212) and a capturing unit bracket (4213); the capturing net units (4211) are rotatably connected to the capturing unit bracket (4213) via the rotating parts (4212); the rotating shaft of the rotating part (4212) extends along the axial direction or the axially parallel direction of the tank body (41), so that the plurality of capturing net units (4211) can change the liquid-facing area of ​​the deformable capturing net (421) when rotating around the rotating shaft. The plurality of capturing net units (4211) are arranged in a matrix on both sides of the stirring main shaft (44).

2. The sodium caseinate industrial preparation system according to claim 1, wherein The stirring collector (42) includes two arc-surface collecting nets (422). The two arc surface capturing nets (422) are respectively connected to the radial two side edges of the deformable capturing net (421), and the central angle of the inner arc surface of the two arc surface capturing nets (422) is less than 180 degrees. The circumferential extension directions of the two cambered surface capture nets (422) relative to the deformable capture net (421) are both counterclockwise; or, the circumferential extension directions of the two cambered surface capture nets (422) relative to the deformable capture net (421) are both clockwise.

3. The industrialized preparation system of sodium caseinate according to claim 2, wherein The rotation range of the capturing net unit (4211) is limited to one side of the main plane of the capturing unit bracket (4213), and the side is close to the arc-surface capturing net (422) adjacent to the capturing net unit (4211). The rotation range of the multiple capturing net units (4211) on one side of the stirring main shaft (44) and the rotation range of the multiple capturing net units (4211) on the other side of the stirring main shaft (44) are respectively limited to two opposite sides of the main plane of the capturing unit bracket (4213).

4. The industrialized preparation system of sodium caseinate according to claim 2, wherein The stirring collector (42) further comprises a collector frame (423), wherein the collector frame (423) is connected to the stirring main shaft (44) and the two arc-surface collecting nets (422).

5. The industrialized preparation system of sodium caseinate according to claim 1, wherein The plurality of capturing net units (4211) rotate within a range of 0 to 90 degrees from a vertical plane of the capturing unit bracket (4213) to a parallel plane of the capturing unit bracket (4213).

6. The industrialized preparation system of sodium caseinate according to claim 1, characterized in that: The mesh of the capture net unit (4211) is a square hole, and the side length of the square hole is 4 to 8 mm. The deformable collecting net (421) is provided with 4 to 8 rows of collecting net units (4211), The deformable capturing net (421) is provided with 4 to 6 rows of capturing net units (4211).

7. The industrialized preparation system of sodium caseinate according to claim 1, characterized in that: The invention also comprises a water supply unit (10), a powder bin (20) and a mixer (30), wherein the water supply unit (10) and the powder bin (20) are both connected to the mixer (30) so as to mix the casein powder with water in the mixer (30).

8. The industrialized preparation system of sodium caseinate according to claim 1, wherein It also includes a by-product collection tank (60) and a temporary storage tank (90), The by-product collecting tank (60) is connected to the acid precipitation tank (40) and is used to collect the clear liquid formed after the casein is captured in the acid precipitation tank (40). The temporary storage tank (90) is connected to the alkali dissolving tank (70) and is used to collect the sodium caseinate solution formed in the alkali dissolving tank (70).

9. The industrialized preparation system of sodium caseinate according to claim 8, characterized in that: Also includes a colloid mill and a sterilizer (80), The colloid mill is arranged between the acid precipitation tank (40) and the alkali dissolution tank (70) and is used to break casein micelles. The sterilizer (80) is arranged between the alkali dissolving tank (70) and the temporary storage tank (90) and is used to sterilize the sodium caseinate solution.

10. The industrialized preparation system of sodium caseinate according to claim 1, characterized in that: It also includes an acid tank (51) and an alkali tank (52), The acid liquid tank (51) is connected to the acid precipitation tank (40) and is used to pass the acid liquid into the acid precipitation tank (40). The alkali solution tank (52) is connected to the alkali solution tank (70) and is used to introduce alkali solution into the alkali solution tank (70).

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