A device and method for preparing pure natural water-soluble curcumin powder

Abstract

The present invention relates to the technical field of water-soluble powder preparation, specifically disclose a kind of pure natural water-soluble curcumin powder preparation device and preparation method thereof, including a mixing mechanism, a high-speed dispersing mechanism and an ultrasonic crushing mechanism connected in sequence by a pipeline, also including a freeze dryer arranged at the ultrasonic crushing mechanism rear end;The mixing mechanism is used to prepare and refrigerate the aqueous phase solution used for the preparation of water-soluble curcumin powder;The mixing mechanism includes: a mixing tank, an interlayer is provided on its sidewall;A stirring mechanism includes a stirring shaft, the outer wall of the stirring shaft is provided with a cooling cylinder, and the cooling cylinder outer wall is provided with multiple stirring blades, and multiple stirring blades are evenly arranged 2 4 groups along the circumferential direction, and the multiple stirring blades in each group have the same radial direction;U-shaped pipe, one of which end is connected with a transmission mechanism, realizes rotation by a transmission mechanism.The present invention can not only realize the preparation of pure natural water-soluble curcumin powder, and can have both lower energy consumption and realize the uniform refrigeration of aqueous phase solution.

Description

Technical Field

[0001] The present invention relates to the technical field of water-soluble powder preparation, and in particular to a device for preparing pure natural water-soluble curcumin powder and a preparation method thereof. Background Art

[0002] The preparation process of water-soluble powder mainly includes emulsification and spray drying. Among them, the emulsification process is to achieve uniform dispersion of powder in the aqueous phase through stirring, high-speed dispersion and other equipment, and spray drying is used to achieve powderization of the aqueous phase solution with uniformly dispersed powder.

[0003] Curcumin, a natural polyphenol compound extracted from turmeric, is widely used in food, medicine, and health supplements. It exhibits significant antioxidant, anti-inflammatory, antibacterial, and anticancer activities, and can effectively regulate the human immune system. However, due to its strong hydrophobicity, curcumin has extremely low solubility in water, which severely limits its bioavailability and absorption rate.

[0004] In the prior art, in order to improve the water solubility and stability of curcumin, chemical modification, nanoemulsification, microencapsulation, physical modification and other methods are usually used to increase the water solubility of curcumin. The above methods involve first adding an emulsifier and a stabilizer to water to form an aqueous solution, and then adding curcumin powder for mixing and emulsification.

[0005] In order to ensure that the emulsifier and stabilizer can be fully dissolved and evenly dispersed in the aqueous solution, the prepared aqueous solution is refrigerated at 2°C-8°C for a period of time for better results. In the experimental stage, the aqueous solution can be directly placed in a refrigerator for refrigeration. In the industrial production stage, a stirring device with a cooling jacket is usually used. For example, a low-temperature stirrer disclosed in CN205995357U cools the stirrer by means of a jacket. However, directly introducing the cooling medium into the jacket has the following technical problems:

[0006] 1) If the cooling medium temperature is not particularly low, when the diameter of the stirring tank is large, it is impossible to reduce the temperature of the aqueous solution on the center side of the stirring tank to 2°C-8°C. If the cooling medium temperature is too low, it will lead to high energy consumption;

[0007] 2) Directly introducing the cooling medium into the interlayer will result in a large amount of cooling medium being introduced. Summary of the Invention

[0008] The present invention aims to provide a device for preparing pure natural water-soluble curcumin powder, which can not only prepare pure natural water-soluble curcumin powder but also has low energy consumption and can achieve uniform refrigeration of the aqueous solution.

[0009] In addition, the present invention also provides a preparation method based on the above-mentioned pure natural water-soluble curcumin powder preparation device.

[0010] The present invention is achieved through the following technical solutions:

[0011] A device for preparing pure natural water-soluble curcumin powder comprises a mixing mechanism, a high-speed dispersing mechanism and an ultrasonic crushing mechanism connected in sequence through pipelines, and also comprises a freeze dryer arranged at the rear end of the ultrasonic crushing mechanism;

[0012] The mixing mechanism is used to prepare and refrigerate an aqueous solution for preparing water-soluble curcumin powder; the mixing mechanism comprises:

[0013] A mixing tank having an interlayer provided on its side wall;

[0014] A stirring mechanism is provided in the mixing tank, comprising a stirring shaft, a cooling cylinder is coaxially provided on the outer wall of the stirring shaft, a plurality of stirring blades are provided on the outer wall of the cooling cylinder, the plurality of stirring blades are evenly arranged in 2-4 groups along the circumference, and the plurality of stirring blades in each group have the same radial direction;

[0015] A cooling pipe is disposed in the mixing tank and includes a U-shaped pipe, one end of which is connected to a transmission mechanism. The U-shaped pipe rotates by the transmission mechanism, thereby driving the other end of the U-shaped pipe to rotate around the end connected to the transmission mechanism. When the mixing tank is in a refrigerated state, the cooling pipe rotates between two adjacent sets of stirring blades; when the mixing tank is in a stirring state, the cooling pipe moves out of the two adjacent sets of stirring blades.

[0016] The interlayer, cooling cylinder and cooling pipe can all be circulated with cooling medium.

[0017] Since the stabilizers and emulsifiers used in the aqueous solution used to prepare curcumin in the present invention include maltodextrin, gum arabic and xanthan gum, maltodextrin, gum arabic and xanthan gum are common thickeners for food, in order to ensure that the emulsifier and stabilizer can be fully dissolved and evenly dispersed in the aqueous solution, the prepared aqueous solution is refrigerated at 2°C-8°C for a period of time, which has a better effect. Because refrigeration helps to reduce the movement rate of molecules or particles in the solution, this means that the colloid in the solution will maintain a more stable dispersed state; and lower temperatures help to inhibit crystallization and precipitation, maintain the stability of the colloidal solution, and enable them to be evenly dispersed. Therefore, it is necessary to refrigerate the prepared aqueous solution in which maltodextrin, gum arabic and xanthan gum are dissolved and dispersed to ensure that the prepared pure natural water-soluble curcumin powder has good uniformity.

[0018] The pure natural water-soluble curcumin powder of the present invention refers to a water-soluble curcumin powder prepared without using chemical modification or harmful chemicals, and only by adding natural emulsifiers and stabilizers into the curcumin powder.

[0019] At present, a common stirring device capable of achieving cooling is to set an interlayer (jacket) on the stirring tank and cool the material in the stirring tank by passing a cooling medium into the interlayer. Since stirring tanks for large-scale industrial applications usually have a large diameter, if cooling is achieved only through the jacket, in order to ensure that the material on the axial center side of the stirring tank is also cooled, a lower cooling medium needs to be passed into the jacket to cool the material away from the jacket side (axial center side) to a specified temperature. The lower the temperature of the cooling medium, the higher the energy consumption for preparing the cooling medium.

[0020] Specifically in the present application, the purpose of introducing the cooling medium is not only to cool the material (aqueous solution) in the mixing tank, but also to refrigerate it for a period of time, that is, the aqueous solution in the mixing tank needs to be maintained at a low temperature (2-8°C) for a period of time. The longer the maintenance time, the more cooling medium is used, that is, compared with cooling the aqueous solution to 2-8°C, using the same temperature of the cooling medium, the energy consumption required for refrigeration is higher. Therefore, when refrigerating the aqueous solution, the present invention not only needs to consider that all the aqueous solutions in the mixing tank can be cooled to 2-8°C, but also needs to consider how to set the cooling method to achieve low energy consumption during refrigeration.

[0021] The invention discloses a mixing mechanism, a high-speed dispersing mechanism, an ultrasonic crushing mechanism and a freeze dryer for preparing pure natural water-soluble curcumin powder. Except for the mixing mechanism, other devices used adopt existing technologies. The high-speed dispersing mechanism is used to achieve high-speed dispersion of a solution through high-speed stirring; the ultrasonic crushing mechanism is used to achieve ultrasonic homogenization of the solution through ultrasonic waves; and the freeze dryer is used to achieve powderization of the solution through freeze drying.

[0022] The mixing mechanism of the present invention is an improvement on the existing low-temperature stirring tank. The mixing tank of the present invention not only adopts interlayer cooling, but also 1) improves the stirring mechanism by coaxially arranging a cooling cylinder on the stirring shaft. Due to the coaxial arrangement, the added cooling cylinder will not affect the rotation and stirring of the stirring mechanism, and the cooling cylinder can cool the aqueous solution on the center side of the mixing tank axis by introducing a cooling medium; 2) a cooling pipe is added in the mixing tank, and the cooling pipe can cool the aqueous solution between the cooling cylinder and the interlayer in the mixing tank by introducing a cooling medium.

[0023] That is, the present invention adds cooling cylinders and cooling pipes on the basis of existing interlayer cooling, thereby realizing three-layer cooling from the outside to the inside in the radial direction of the mixing tank; ensuring that the aqueous phase solution in the mixing tank has a lower temperature transfer path when cooling, avoiding the existing technology of using only interlayer cooling, which requires the use of too low a cooling medium to achieve that all aqueous phase solutions in the mixing tank can be reduced to the refrigeration temperature and kept refrigerated for a period of time.

[0024] In summary, the present invention can not only prepare pure natural water-soluble curcumin powder, but also has low energy consumption and realizes uniform refrigeration of the aqueous solution.

[0025] However, adding a cooling pipe in the mixing tank has the following technical difficulties:

[0026] If the cooling pipe is set near one side of the cooling cylinder or at the center between the cooling cylinder and the interlayer, the rotation of the stirring blade will be blocked and stirring cannot be achieved. If the length of the stirring blade is shortened to adapt to the position of the cooling pipe, the mixing effect of the aqueous solution will be affected. If the cooling pipe is set near one side of the interlayer, although it will not affect the rotation of the stirring blade, due to the increased spacing between the cooling pipe and the cooling cylinder, synchronous cooling cannot be achieved between the cooling cylinder and the cooling pipe. A lower cooling medium needs to be introduced to achieve uniform cooling and refrigeration of the aqueous solution in the mixing tank, and there is still a problem of high energy consumption.

[0027] The present invention rationally designs the structure of the cooling pipe. The cooling pipe is a U-shaped pipe, and one end of the U-shaped pipe is connected to a transmission mechanism. The transmission mechanism realizes self-rotation. When the mixing tank is in a refrigerated state, the cooling pipe is rotated to between two adjacent groups of stirring blades; when the mixing tank is in a stirring state, the cooling pipe is moved out of the two adjacent groups of stirring blades.

[0028] That is, the cooling tube of the present invention can not only realize independent circulation of the cooling medium, but also can realize uniform refrigeration of the aqueous solution in the mixing tank at low energy consumption by rotating without affecting the rotation of the stirring blade.

[0029] In a preferred case, one end of the U-shaped tube passes through the top of the mixing tank and is connected to the transmission mechanism, and the other end includes a fixed section and a flexible section. The fixed section is connected to the top of the mixing tank, and the end of the fixed section placed on the inner side of the mixing tank is connected to the U-shaped tube through the flexible section.

[0030] The U-shaped tube of the above structure of the present invention can not only fix the U-shaped tube on the top of the mixing tank, but also, by providing a flexible section, utilize the flexibility of the flexible section to adapt the U-shaped tube to rotate around the other side provided with the flexible section, so as to realize the switching of the mixing tank between the stirring state and the refrigerated state by rotating the cooling tube.

[0031] Specifically, the flexible section is a bellows or a hose.

[0032] In a preferred embodiment, a second sealing member is provided at the connection between the fixed section and the top of the mixing tank.

[0033] In a preferred embodiment, a first sealing member is provided at the connection between one end portion of the U-shaped tube and the top of the mixing tank.

[0034] The second sealing member and the first sealing member of the present invention are both provided to improve the sealing performance of the mixing tank and to prevent the aqueous solution from transferring heat with the outside during refrigeration, thereby affecting the refrigeration effect.

[0035] In a preferred case, the first sealing member includes a fixing ring and a sealing gasket; the fixing ring is slidably arranged on the outer wall of the U-shaped tube, and the sealing gasket is used to seal the gap between the U-shaped tube and the top of the mixing tank.

[0036] When the mixing tank is in a stirring state, the first seal can be moved upward to prevent the first seal from affecting the rotation of the U-shaped tube. When the mixing tank is in a refrigerated state, the first seal can be moved downward to the gap between one side of the U-shaped tube and the top of the mixing tank to achieve sealing, so as to prevent the aqueous solution from exchanging heat with the external environment through the gap during the refrigeration process.

[0037] In a preferred case, a connecting pipe is provided between the two side walls of the U-shaped tube, and the connecting pipe is connected to the U-shaped tube.

[0038] The cooling tube of the present invention with the above structure can increase the contact area between the cooling tube and the aqueous solution, thereby improving the cooling effect.

[0039] In a preferred embodiment, when the mixing tank is in a refrigerated state, the cooling pipe is located on the midline of the angle formed by two adjacent groups of stirring blades.

[0040] The above arrangement allows for the installation of cooling tubes with a larger cooling area as possible without affecting the rotation of the cooling tubes. This means that the diameter and width of the U-shaped tubes can be set relatively large. The width of the U-shaped tube refers to the horizontal distance between the outer walls of the two sides of the U-shaped tube.

[0041] In a preferred embodiment, the number of cooling tubes is consistent with the number of groups of stirring blades in the same circumferential direction.

[0042] In a preferred case, the transmission mechanism includes a gear plate, a second gear, and a plurality of first gears;

[0043] The first gear is arranged in a one-to-one correspondence at one end of the U-shaped tube;

[0044] The toothed disc is arranged above the top of the mixing tank, meshing with both the second gear and the first gear, and is provided with a first through hole for passing the stirring shaft;

[0045] The second gear is connected to the second power output shaft of the second motor.

[0046] The transmission mechanism of the above structure can not only realize the self-rotation of one end of the U-shaped tube, but also realize the synchronous rotation of multiple U-shaped tubes, which is easy to control.

[0047] In a preferred embodiment, the toothed disc is provided with a second through hole for passing the other end portion of the U-shaped tube.

[0048] In a preferred case, a water inlet and a water outlet are respectively provided at the two ends of the U-shaped tube, and the water inlet and the water outlet are placed on the top outer side of the mixing tank.

[0049] In a preferred embodiment, the stirring blade is detachably connected to the cooling cylinder to facilitate blade replacement.

[0050] In a preferred embodiment, the outer wall of the mixing tank is provided with an insulation layer to reduce heat exchange between the aqueous solution and the outside during refrigeration.

[0051] In a preferred case, since the present invention has achieved three-layer cooling from the outside to the inside in the radial direction in the mixing tank by adding cooling cylinders, cooling pipes, and cooperating with interlayers, therefore, in order to solve the problem that directly introducing the cooling medium into the interlayer will result in a large amount of cooling medium, the present invention can not directly introduce the cooling medium into the interlayer, but instead set a spiral tube in the interlayer, and achieve cooling by introducing the cooling medium into the spiral tube. Since the present invention adopts three-layer cooling from the outside to the inside, even if spiral tube cooling is used, the amount of cooling medium is less than that directly introduced into the interlayer, but it can still meet the refrigeration requirements.

[0052] In a preferred embodiment, the invention further comprises a control unit, which includes a controller, a temperature sensor, a camera unit, a valve group, a first motor and a second motor;

[0053] The temperature sensor is used to collect the temperature of the aqueous solution in real time and transmit the collected temperature to the controller;

[0054] The camera unit is used to collect the relative positions of the cooling pipe and the stirring blade in the mixing tank and transmit the collected positions to the controller;

[0055] The controller is used to control the opening and closing and opening degree of the valve group, control the start and stop of the first motor, control the start and stop of the second motor, and control the forward and reverse rotation;

[0056] The valve group is used to connect the interlayer, cooling cylinder and cooling pipe with the external cooling unit for providing cooling medium;

[0057] The first motor is used to drive the stirring shaft to rotate;

[0058] The second motor is used to drive the transmission mechanism to perform transmission.

[0059] The present invention can realize automatic control of the mixing mechanism by arranging a control unit.

[0060] The method for preparing pure natural water-soluble curcumin powder based on the above-mentioned pure natural water-soluble curcumin powder preparation device comprises the following steps:

[0061] S1. Preparation of aqueous solution: placing a mixing tank in a stirring state; adding maltodextrin, gum arabic, and xanthan gum to the mixing tank in proportion, then adding 40°C pure water and stirring for 1-2 hours until the maltodextrin, gum arabic, and xanthan gum are completely dispersed and dissolved to obtain an aqueous solution; then rotating the cooling tube to refrigerate the mixing tank, introducing a cooling medium into the interlayer, cooling cylinder, and cooling tube to adjust the temperature of the aqueous solution to 2-8°C, and refrigerating for 24 hours;

[0062] S2, turmeric oil dispersion: the refrigerated aqueous solution is introduced into a high-speed dispersion mechanism, and turmeric oil is added and stirred at high speed to uniformly disperse the turmeric oil;

[0063] S3. Adding and dispersing curcumin: Using ultrafine grinding technology to process curcumin to ensure that its particle size reaches the micrometer or nanometer level, and then adding it to the system prepared in step S2, and stirring at high speed to form a preliminarily uniformly dispersed system;

[0064] S4, ultrasonic homogenization: introducing the system prepared in step S3 into an ultrasonic crushing mechanism for homogenization until a nano-dispersion liquid with uniform particle size is formed;

[0065] S5. Freeze-drying: placing the nano-dispersion liquid in a freeze dryer for freeze-drying to obtain pure natural water-soluble curcumin powder.

[0066] The preparation method provided by the present invention is simple and easy to implement, has low production cost, and is environmentally friendly. The prepared water-soluble curcumin powder has good water solubility and stability, and has broad market application prospects.

[0067] In a preferred embodiment, in steps S2 and S3, the rotation speed of the high-speed stirring is 8000-8500 r / min.

[0068] In a preferred embodiment, when ultrasonic homogenization is performed, the power of the ultrasonic wave is 100W, and the process is performed alternately with 2 seconds of operation and 3 seconds of pause.

[0069] In a preferred case, the mass ratio of maltodextrin, gum arabic, xanthan gum and pure water is 6: (8.5-9.0): (0.4-0.5): 40; the mass ratio of turmeric oil to pure water is 1:40, and the mass ratio of curcumin to pure water is 1:1.

[0070] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0071] 1. The mixing mechanism, high-speed dispersion mechanism, ultrasonic crushing mechanism and freeze dryer of the present invention respectively realize the preparation of aqueous solution, high-speed dispersion, ultrasonic homogenization and powderization, and finally complete the preparation of pure natural water-soluble curcumin powder; and the mixing mechanism of the present invention adds a cooling cylinder and a cooling pipe on the basis of existing interlayer cooling, thereby realizing three-layer cooling from the outside to the inside in the radial direction in the mixing tank, and the provided cooling pipe realizes rotation through a transmission mechanism, and when the mixing tank is in a refrigerated state, the cooling pipe is rotated between two adjacent groups of stirring blades; when the mixing tank is in a stirring state, the cooling pipe is moved out of the two adjacent groups of stirring blades, not only realizing the refrigeration of the aqueous solution between the cooling cylinder and the interlayer, but also not affecting normal stirring, the present invention can avoid the use of too low a cooling medium, that is, compared with only using interlayer cooling, a cooling medium with a relatively high temperature can be used to realize uniform refrigeration of the aqueous solution in the mixing tank, and finally the present invention realizes both low energy consumption and uniform refrigeration of the aqueous solution.

[0072] 2. The present invention not only realizes automatic control of the mixing mechanism by setting a control unit, but also sets a camera unit based on the specific structure of the mixing tank of the present invention. The camera unit is used to collect the relative positions of the cooling pipe and the stirring blades in the mixing tank, and transmit the collected positions to the controller. The relative positions of the cooling pipe and the stirring blades collected by the camera unit can be used as a supplementary signal to avoid malfunctions in the rotation process of the cooling pipe, resulting in the cooling pipe not being completely moved out of the two adjacent groups of stirring blades, and the controller issuing a stirring command causing the cooling pipe to be hit by the stirring blades and thus broken or deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0074] Figure 1 Schematic diagram of the structure of the device for preparing pure natural water-soluble curcumin powder in Example 1 of the present invention;

[0075] Figure 2 A top view of the mixing tank in a refrigerated state in Example 1 of the present invention;

[0076] Figure 3 for Figure 2 Middle AA section view;

[0077] Figure 4 A top view of the mixing tank in a stirring state in Example 1 of the present invention;

[0078] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle;

[0079] Figure 6A top view of the transmission mechanism in Example 1 of the present invention;

[0080] Figure 7 This is a schematic structural diagram of the cooling tube in Example 1 of the present invention;

[0081] Figure 8 This is a schematic structural diagram of a cooling pipe in Example 2 of the present invention;

[0082] Figure 9 This is a schematic structural diagram of the cooling tube in Example 3 of the present invention;

[0083] Figure 10 This is a logic block diagram of the control unit in Example 4 of the present invention.

[0084] Markings and corresponding parts names in the accompanying drawings:

[0085] 1-Mixing tank;

[0086] 11-interlayer; 12-support plate; 101-first liquid inlet pipe; 102-first liquid outlet pipe;

[0087] 2-Cooling pipe;

[0088] 21-U-shaped tube; 22-flexible section; 23-water inlet; 24-water outlet; 25-first sealing member; 26-second sealing member; 27-connecting pipe;

[0089] 251-fixing ring; 252-sealing gasket;

[0090] 3-Cooling cylinder; 4-Stirring blade; 5-Stirring shaft;

[0091] 31-bump;

[0092] 6-sprocket;

[0093] 61-first through hole; 62-second through hole;

[0094] 7-first gear; 8-second gear; 9-second power output shaft;

[0095] 100-mixing mechanism; 200-high-speed dispersion mechanism; 300-ultrasonic crushing mechanism; 400-freeze dryer;

[0096] 201-dispersion tank; 202-high-speed dispersion equipment; 203-second liquid inlet pipe; 204-second liquid outlet pipe; 301-ultrasonic tank; 302-ultrasonic crushing equipment; 303-third liquid inlet pipe; 304-third liquid outlet pipe. DETAILED DESCRIPTION

[0097] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the examples. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. The embodiments described below are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0098] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that these specific details are not necessarily required to practice the present invention. In other examples, well-known structures, materials, or methods are not specifically described to avoid obscuring the present invention. The materials, instruments, and reagents used in the following examples, unless otherwise specified, are commercially available. The techniques used in the examples, unless otherwise specified, are conventional techniques well known to those skilled in the art.

[0099] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0100] Example 1:

[0101] like Figure 1-Figure 7 As shown, a device for preparing pure natural water-soluble curcumin powder comprises a mixing mechanism 100, a high-speed dispersing mechanism 200, and an ultrasonic crushing mechanism 300, which are sequentially connected by pipelines. It also includes a freeze dryer 400 disposed at the rear end of the ultrasonic crushing mechanism 300. The mixing mechanism 100 is used to mix an emulsifier, a stabilizer, and pure water to form an aqueous solution, which is then refrigerated; the high-speed dispersing mechanism 200 is used to disperse the solution through high-speed stirring; the ultrasonic crushing mechanism 300 uses ultrasonic waves to homogenize the solution; and the freeze dryer 400 pulverizes the solution through freeze drying.

[0102] Among them, the high-speed dispersion mechanism 200 includes a dispersion tank 201 and a high-speed dispersion device 202. The dispersion tank 201 is provided with a second liquid inlet pipe 203 and a second liquid outlet pipe 204. The second liquid inlet pipe 203 is used to connect with the mixing mechanism 100. Among them, the high-speed dispersion device 202 is any device that can achieve high-speed dispersion; the stirring section of the high-speed dispersion device 202 is inserted into the dispersion tank 201.

[0103] Among them, the ultrasonic crushing mechanism 300 includes an ultrasonic tank 301 and an ultrasonic crushing device 302. The ultrasonic tank 301 is provided with a third liquid inlet pipe 303 and a third liquid outlet pipe 304. The third liquid inlet pipe 303 is connected to the second liquid outlet pipe 204 through a pipeline; the ultrasonic crushing device 302 is any device that can achieve ultrasonic homogenization; the ultrasonic oscillation end of the ultrasonic crushing device 302 is inserted into the ultrasonic tank 301.

[0104] When in use, the homogenized solution can be connected to the third liquid outlet pipe 304 through the container loaded with the solution and placed in the freeze dryer 400 for freeze drying. The freeze drying temperature is set to -50°C and the vacuum degree is maintained below 10 Pa until the sample is completely dry.

[0105] The mixing mechanism 100 is used to prepare and refrigerate an aqueous solution for preparing water-soluble curcumin powder; the mixing mechanism 100 includes:

[0106] The mixing tank 1 has a sidewall provided with an interlayer 11, on which a first cooling inlet pipe and a first cooling outlet pipe are provided. The interlayer 11 forms a first cooling circulation pipeline with an external cooling unit through the first cooling inlet pipe and the first cooling outlet pipe. Preferably, the mixing tank 1 includes an inner liner and an outer shell of the same shape but different sizes. The interlayer 11 is formed between the inner liner and the sidewalls and the bottom of the outer shell to achieve bottom cooling of the mixing tank 1. A plurality of support plates 12 are provided between the bottom of the inner liner and the outer shell. The tops of the inner liner and the outer shell sidewalls are sealed with end caps. The mixing tank 1 is provided with a feed pipe, a first liquid inlet pipe 101, and a first liquid outlet pipe 102. The feed pipe is used to add stabilizers and emulsifiers to the mixing tank 1. The first liquid inlet pipe 101 is used to introduce 40°C pure water into the mixing tank 1. The first liquid outlet pipe 102 is used to discharge the refrigerated aqueous solution. The first liquid outlet pipe 102 is provided with a valve and is connected to the second liquid inlet pipe 203 via a pipeline. Preferably, the outer wall of the mixing tank 1 is provided with a heat-insulating layer, and the heat transfer between the aqueous solution and the outside world during the refrigeration process is reduced by the provided heat-insulating layer.

[0107] The stirring mechanism is arranged in the mixing tank 1 and includes a stirring shaft 5. One end of the stirring shaft 5 extends out of the mixing tank 1 and is connected to the first power output shaft of the first motor. The stirring shaft 5 is driven to rotate by the first motor. The outer wall of the stirring shaft 5 is coaxially provided with a cooling cylinder 3, and a second cooling inlet pipe and a second cooling outlet pipe are provided on the cooling cylinder 3. The second cooling inlet pipe and the second cooling outlet pipe extend out of the mixing tank 1, and form a second cooling circulation pipeline with the external cooling unit through the cooling inlet pipe and the cooling outlet pipe. In order to prevent the second cooling inlet pipe and the second cooling outlet pipe from affecting the rotation of the cooling cylinder 3 with the stirring shaft 5, the second cooling inlet pipe and the second cooling outlet pipe are fixedly connected to the external pipe at one end, and the other end is rotatably connected to the cooling cylinder 3. The specific method of rotational connection is that two through holes are correspondingly provided at the top of the cooling cylinder 3, and a slide groove is provided on the wall of the through hole, and a slider matching the slide groove is provided on the second cooling inlet pipe and the second cooling outlet pipe. This rotational connection method is the prior art. A plurality of stirring blades 4 are provided on the outer wall of the cooling cylinder 3, and the plurality of stirring blades 4 are evenly arranged in 2-4 groups along the circumference. The plurality of stirring blades 4 in each group have the same radial direction, that is, the projections of the plurality of stirring blades 4 in each group in the vertical direction completely overlap. In a specific case, such as Figure 2 、 Figure 3 As shown, the stirring blades 4 are evenly arranged in 4 groups along the circumference, and each group is provided with 3 stirring blades 4 from top to bottom. The 3 stirring blades 4 have the same shape, size and the same radial direction, and a 90° angle is formed between two adjacent groups of stirring blades 4. Preferably. In order to facilitate the replacement of the stirring blades 4, the stirring blades 4 are detachably connected to the cooling cylinder 3, such as Figure 5 As shown, a protrusion 31 is provided on the outer wall of the cooling cylinder 3, and a U-shaped groove is provided at one end of the stirring blade 4. The protrusion 31 is inserted into the U-shaped groove and connected by bolts.

[0108] The cooling pipe 2 is arranged in the mixing tank 1 and includes a U-shaped pipe 21. One end of the U-shaped pipe 21 is connected to the transmission mechanism, and the transmission mechanism realizes self-rotation, thereby driving the other end of the U-shaped pipe 21 to rotate around the side connected to the transmission mechanism. Figure 2 As shown, when the mixing tank 1 is in a refrigerated state, the cooling tube 2 is rotated to between two adjacent groups of stirring blades 4. At this time, the width direction of the U-shaped tube 21 is the radial direction of the mixing tank 1, that is, the two side walls of the U-shaped tube 21 are arranged from the inside to the outside in the inner radial direction of the mixing tank 1. The width direction of the U-shaped tube 21 specifically refers to the direction of the distance between the two side walls of the U-shaped tube 21, which is also the width direction of the U-shaped tube 21. Figure 3 In the horizontal direction, since it is in the refrigerated state, the stirring blade 4 stops rotating, and the U-shaped tube 21 is rotated to Figure 2 As shown in the direction, the cooling effect of the U-shaped tube 21 can be improved; Figure 4As shown, when the mixing tank 1 is in a stirring state, the cooling tube 2 is moved out of the two adjacent groups of stirring blades 4. At this time, the width of the U-shaped tube 21 is perpendicular to the radial direction of the mixing tank 1, and the U-shaped tube 21 is not in the rotation path of the stirring blades 4, and will not block the normal rotation of the stirring blades 4.

[0109] The cooling pipe 2 of the above structure in this embodiment can not only realize independent circulation of the cooling medium, but also can be rotated without affecting the rotation of the stirring blade 4 and without affecting the uniform refrigeration of the aqueous phase solution 1 in the mixing tank at low energy consumption.

[0110] Preferably, when the mixing tank 1 is in a refrigerated state, the cooling pipe 2 is located on the midline of the angle formed by two adjacent groups of stirring blades 4 .

[0111] Preferably, the number of cooling tubes 2 is consistent with the number of groups of stirring blades 4 in the same circumferential direction.

[0112] In a specific case, Figure 3 、 Figure 7 As shown, in order to achieve the U-shaped tube 21 fixed to the top of the mixing tank 1 without affecting the rotation of the U-shaped tube 21, one end of the U-shaped tube 21 passes through the top of the mixing tank 1 and is connected to the transmission mechanism, and the other end includes a fixed section and a flexible section 22. The fixed section is connected to the top of the mixing tank 1, and the end of the fixed section placed inside the mixing tank 1 is connected to the U-shaped tube 21 through the flexible section 22. The flexible section 22 is used to rotate the U-shaped tube 21. The flexible section 22 is a corrugated tube or a hose. The two ends of the U-shaped tube 21 are respectively provided with a water inlet 23 and a water outlet 24. The U-shaped tube 21 forms a third cooling circulation pipeline with the external cooling unit through the water inlet 23 and the water outlet 24.

[0113] The interlayer 11, the cooling cylinder 3 and the cooling pipe 2 can all be circulated with cooling medium.

[0114] Preferably, a spiral tube (not shown) is provided in the interlayer 11, and cooling is achieved by passing a cooling medium into the spiral tube. Since this embodiment adopts three-layer cooling from the outside to the inside, even if spiral tube cooling is adopted, although the amount of cooling medium is less than that directly passed into the interlayer 11, it can still meet the refrigeration requirements.

[0115] Specifically, if Figure 6 As shown, the transmission mechanism includes a gear wheel 6, a second gear 8 and a plurality of first gears 7;

[0116] The first gear 7 is disposed in a one-to-one correspondence at one end of the U-shaped tube 21;

[0117] The toothed disc 6 is disposed above the top of the mixing tank 1 and is meshed with both the second gear 8 and the first gear 7. The toothed disc 6 is provided with a first through hole 61 for passing the stirring shaft 5 and a second through hole 62 for passing the other end of the U-shaped tube 21.

[0118] The second gear 8 is connected to the second power output shaft 9 of the second motor.

[0119] The working principle of this embodiment is as follows:

[0120] The second motor drives the second gear 8 to rotate, which can rotate the gear plate 6. The rotation of the gear plate 6 drives the first gear 7 to rotate. The rotation of the first gear 7 drives one of the side walls of the U-shaped tube 21 to rotate, and then drives the other side wall of the U-shaped tube 21 to rotate. According to the different usage states of the mixing tank 1, the U-shaped tube 21 is rotated to different positions to meet the needs of refrigeration or stirring and mixing.

[0121] When the mixing tank 1 is used for stirring, the second motor rotates forward, driving the U-shaped tube 21 to rotate to Figure 4 The stirring shaft 5 is then driven by the first motor to rotate to achieve uniform mixing of the aqueous solution. When the aqueous solution is uniformly mixed, the first motor stops working and the stirring blade 4 is rotated to Figure 4 Then the mixing tank 1 is used for refrigeration, so that the second motor is reversed, driving the U-shaped tube 21 to rotate to Figure 2 As shown in the position, at this time, the U-shaped tube 21 is placed between two adjacent groups of stirring blades 4 to better cool the aqueous solution, and then the first cooling circulation pipeline, the second cooling circulation pipeline and the third cooling circulation pipeline are connected to realize the introduction of cooling medium into the interlayer 11, the cooling cylinder 3 and the cooling tube 2, and the cooling medium of the interlayer 11, the cooling cylinder 3 and the cooling tube 2 is used to realize the cooling and refrigeration of the aqueous solution in the mixing tank 1.

[0122] Since the aqueous solution prepared in this embodiment not only needs to be cooled to 2-8°C, but also needs to be refrigerated at 2-8°C for a period of time, it is necessary to pass the cooling medium for a long time. Therefore, the energy consumption problem caused by the temperature of the cooling medium is more prominent. The specific temperature of the cooling medium needs to be determined according to the size of the mixing tube, the volume of the cooling medium channel that can be passed through, and the cooling time. Assuming that the cooling time is the same and the volume of the interlayer 11 is the same, the energy consumption of the cooling of this embodiment and the cooling of the aqueous solution to 2-8°C by only setting the interlayer 11 is compared. For example: assuming that the temperature of the mixed aqueous solution is 40°C, if the interlayer is used 11 cooling, if a cooling medium of 0°C is used to pass into the interlayer, due to the large distance between the interlayer 11 and the central axis of the mixing tank, the aqueous phase solution on the axial center side of the mixing tank 1 cannot be reduced to 2-8°C, and the cooling medium used needs to be at a lower temperature, such as -5°C or -10°C, etc. However, with the cooling method of this embodiment, since a cooling cylinder and a cooling pipe are added, and the cooling pipe is a U-shaped pipe 21, the width direction of the U-shaped pipe 21 is the radial direction of the mixing tank 1, and the cooling medium is also 0°C, the axial center side where the cooling medium in the interlayer 11 cannot perform heat exchange can use the cooling cylinder and the cooling pipe to perform heat exchange to achieve cooling.

[0123] In summary, the mixing tank 1 of this embodiment realizes three-layer cooling from the outside to the inside in the radial direction of the mixing tank 1 by adding a cooling cylinder 3 and a cooling pipe 2 on the basis of the existing interlayer 11 cooling, and the cooling pipe 2 is provided to realize self-rotation through a transmission mechanism. When the mixing tank 1 is in a refrigerated state, the cooling pipe 2 is rotated to between two adjacent groups of stirring blades 4; when the mixing tank 1 is in a stirring state, the cooling pipe 2 is moved out of the two adjacent groups of stirring blades 4, which not only realizes the refrigeration of the aqueous solution between the cooling cylinder 3 and the interlayer 11, but also does not affect normal stirring. Therefore, this embodiment can avoid the use of too low a cooling medium, that is, compared with only using the interlayer 11 for cooling, a relatively high temperature cooling medium can be used to achieve uniform refrigeration of the aqueous solution in the mixing tank 1. Finally, this embodiment achieves both low energy consumption and uniform refrigeration of the aqueous solution.

[0124] Example 2:

[0125] like Figure 8 As shown, this embodiment is based on Example 1, and the difference from Example 1 is that a corresponding sealing structure is provided on the U-shaped tube 21 to avoid heat exchange between the aqueous solution and the external environment caused by the gap between the U-shaped tube 21 and the mixing tank 1.

[0126] Specifically, a second sealing member 26 is provided at the connection between the fixed section and the top of the mixing tank 1 ; the second sealing member 26 may specifically be a silicone pad or the like.

[0127] A first seal 25 is provided at the connection between one end of the U-shaped tube 21 and the top of the mixing tank 1. To prevent interference with the rotation of the U-shaped tube 21, the first seal 25 comprises a retaining ring 251 and a sealing gasket 252. The retaining ring 251 is slidably mounted on the outer wall of the U-shaped tube 21, specifically by providing a sliding groove on the outer wall of the U-shaped tube 21, and a slider that cooperates with the sliding groove is provided on the inner wall of the retaining ring 251. The sealing gasket 252 is used to seal the gap between the U-shaped tube 21 and the top of the mixing tank 1.

[0128] When the mixing tank 1 is in a stirring state, the first seal 25 can be moved upward to move the sealing gasket 252 out of the gap between the U-shaped tube 21 and the mixing tank 1 to prevent the first seal 25 from affecting the rotation of the U-shaped tube 21. When the mixing tank 1 is in a refrigerated state, the first seal 25 can be moved downward to the gap between one side of the U-shaped tube 21 and the top of the mixing tank 1 to achieve sealing, so as to prevent the aqueous solution from exchanging heat with the external environment through the gap during the refrigeration process.

[0129] Preferably, the fixing rings 251 on each U-shaped tube 21 are connected to form a whole through a connecting rod, and then the whole is connected through a telescopic member, and the multiple fixing rings 251 can be moved up and down synchronously through the telescopic member. The telescopic member can specifically be a hydraulic cylinder or a pneumatic cylinder.

[0130] Example 3:

[0131] like Figure 9 As shown, this embodiment is based on embodiment 1 or embodiment 2, and differs from embodiment 1 or embodiment 2 in that a connecting pipe 27 is provided between the two side walls of the U-shaped tube 21 , and the connecting pipe 27 is connected to the U-shaped tube 21 .

[0132] The provision of the connecting pipe 27 in this embodiment can increase the cooling area of ​​the cooling pipe 2 and improve the cooling effect.

[0133] Example 4:

[0134] like Figure 10 As shown, this embodiment is based on any one of Embodiments 1 to 3, and further includes a control unit, which includes a controller, a temperature sensor, a camera unit, a valve group, a first motor, and a second motor;

[0135] The temperature sensor is used to collect the temperature of the aqueous solution in real time and transmit the collected temperature to the controller;

[0136] The camera unit is used to collect the relative positions of the cooling pipe 2 and the stirring blade 4 in the mixing tank 1 and transmit the collected positions to the controller;

[0137] The controller is used to control the opening and closing and opening degree of the valve group, control the start and stop of the first motor, control the start and stop of the second motor, and control the forward and reverse rotation;

[0138] The valve group is used to connect the interlayer 11, the cooling cylinder 3 and the cooling pipe 2 with the external cooling unit for providing cooling medium;

[0139] The first motor is used to drive the stirring shaft 5 to rotate;

[0140] The second motor is used to drive the transmission mechanism to perform transmission.

[0141] This embodiment is based on the specific structure of the mixing tank 1, especially the structure and rotation mode of the cooling tube 2, and a camera unit is provided. The camera unit is used to collect the relative positions of the cooling tube 2 and the stirring blades 4 in the mixing tank 1, and transmit the collected positions to the controller. The relative positions of the cooling tube 2 and the stirring blades 4 collected by the camera unit can be used as a supplementary signal to avoid malfunctions in the rotation process of the cooling tube 2, resulting in the cooling tube 2 not being completely moved out of the two adjacent groups of stirring blades 4, and the controller issuing a stirring command causing the cooling tube 2 to be hit by the stirring blades 4 and thus broken or deformed.

[0142] Example 5:

[0143] The preparation method of pure natural water-soluble curcumin powder is based on the pure natural water-soluble curcumin powder preparation device described in any one of Examples 1 to 4 above, and the preparation method comprises the following steps:

[0144] S1. Preparation of aqueous solution: Put the mixing tank 1 in a stirring state; add maltodextrin, gum arabic and xanthan gum into the mixing tank 1 in proportion, then add 40°C pure water and stir for 1-2 hours until the maltodextrin, gum arabic and xanthan gum are completely dispersed and dissolved. The mass ratio of maltodextrin, gum arabic, xanthan gum and pure water is 6:8.5-9.0:0.4-0.5:40. For example, in the experimental stage, 6g of maltodextrin, 8.8g of gum arabic and 0.4g of xanthan gum can be added to 40ml of 40°C pure water. In the industrial stage, each material can be scaled up in equal proportions; obtain an aqueous solution; then rotate the cooling tube 2 to put the mixing tank 1 in a refrigerated state, introduce a cooling medium into the interlayer 11, the cooling cylinder 3 and the cooling tube 2 to adjust the temperature of the aqueous solution to 2-8°C, and refrigerate for 24 hours.

[0145] S2. Turmeric oil dispersion: The refrigerated aqueous solution is introduced into the high-speed dispersing mechanism 200, and turmeric oil is added and stirred at high speed to uniformly disperse the turmeric oil. The mass ratio of turmeric oil to pure water in step S1 is 1:40. The high-speed stirring speed is 8000 r / min and the stirring time is 5 minutes.

[0146] S3. Adding and dispersing curcumin: Using ultrafine grinding technology to process curcumin to ensure that its particle size reaches the micrometer or nanometer level, and then adding it to the system prepared in step S2, and stirring at high speed to form a preliminary uniformly dispersed system, wherein the mass ratio of curcumin to the pure water in step S1 is 1:1; wherein the speed of high-speed stirring is 8000 r / min, and the time is 10 minutes.

[0147] S4, ultrasonic homogenization: The system prepared in step S3 is introduced into the ultrasonic crushing mechanism 300 for homogenization until a nano-dispersion liquid with uniform particle size is formed; the ultrasonic power is 100 W, and the operation is performed alternately in a 2-second working cycle and a 3-second pause cycle.

[0148] S5. Freeze-drying: Place the nano-dispersion in a freeze dryer 400 for freeze-drying. The freeze-drying temperature is set to -50°C and the vacuum degree is maintained below 10 Pa until the sample is completely dry to obtain pure natural water-soluble curcumin powder.

[0149] The preparation method provided in this embodiment is simple, easy to implement, low in production cost, and environmentally friendly. The prepared water-soluble curcumin powder has good water solubility and stability, and has broad market application prospects.

[0150] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0151] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. A device for preparing water-soluble curcumin powder, characterized in that, It comprises a mixing mechanism (100), a high-speed dispersion mechanism (200), and an ultrasonic crushing mechanism (300) connected in sequence through pipelines, and also comprises a freeze dryer (400) arranged at the rear end of the ultrasonic crushing mechanism (300); The mixing mechanism (100) is used to prepare and refrigerate an aqueous solution for preparing water-soluble curcumin powder; the mixing mechanism (100) comprises: A mixing tank (1) having an interlayer (11) provided on its side wall; A stirring mechanism is provided in the mixing tank (1), comprising a stirring shaft (5), a cooling cylinder (3) being coaxially provided on the outer wall of the stirring shaft (5), a plurality of stirring blades (4) being provided on the outer wall of the cooling cylinder (3), the plurality of stirring blades (4) being uniformly arranged in 2-4 groups along the circumference, and the plurality of stirring blades (4) in each group having the same radial direction; A cooling pipe (2) is arranged in the mixing tank (1), comprising a U-shaped pipe (21), one end of which is connected to a transmission mechanism, and is rotated by the transmission mechanism. When the mixing tank (1) is in a refrigerated state, the cooling pipe (2) is rotated to between two adjacent groups of stirring blades (4); when the mixing tank (1) is in a stirring state, the cooling pipe (2) is moved out of the two adjacent groups of stirring blades (4); The interlayer (11), the cooling cylinder (3) and the cooling pipe (2) can all be circulated with cooling medium.

2. A water-soluble curcumin powder preparation device according to claim 1, characterized in that, One end of the U-shaped tube (21) passes through the top of the mixing tank (1) and is connected to the transmission mechanism, and the other end comprises a fixed section and a flexible section (22), wherein the fixed section is connected to the top of the mixing tank (1), and one end of the fixed section, which is located inside the mixing tank (1), is connected to the U-shaped tube (21) via the flexible section (22).

3. A water-soluble curcumin powder preparation device according to claim 2, characterized in that, The flexible section (22) is a bellows or a hose.

4. A water-soluble curcumin powder preparation device according to claim 2, characterized in that, A second sealing member (26) is provided at the connection between the fixed section and the top of the mixing tank (1).

5. A water-soluble curcumin powder preparation device according to claim 2, characterized in that, A first sealing member (25) is provided at the connection between one end of the U-shaped tube (21) and the top of the mixing tank (1).

6. A water-soluble curcumin powder preparation device according to claim 5, characterized in that, The first sealing member (25) comprises a fixing ring (251) and a sealing gasket (252); the fixing ring (251) is slidably arranged on the outer wall of the U-shaped tube (21), and the sealing gasket (252) is used to seal the gap between the U-shaped tube (21) and the top of the mixing tank (1).

7. A device for preparing water-soluble curcumin powder according to any one of claims 1 to 6, characterized in that: A communicating pipe (27) is provided between the two side walls of the U-shaped pipe (21), and the communicating pipe (27) is in communication with the U-shaped pipe (21).

8. A device for preparing water-soluble curcumin powder according to any one of claims 1 to 6, characterized in that: When the mixing tank (1) is in a refrigerated state, the cooling pipe (2) is located on the midline of the angle formed by two adjacent groups of stirring blades (4).

9. A water-soluble curcumin powder preparation device according to any one of claims 1 to 6, characterized in that, The number of the cooling tubes (2) is consistent with the number of groups of the stirring blades (4) in the same circumferential direction.

10. A device for preparing water-soluble curcumin powder according to any one of claims 1 to 6, characterized in that: The transmission mechanism comprises a gear wheel (6), a second gear (8), and a plurality of first gears (7); The first gears (7) are arranged in a one-to-one correspondence at one end of the U-shaped tube (21); The toothed disc (6) is arranged above the top of the mixing tank (1), the toothed disc (6) is meshed with both the second gear (8) and the first gear (7), and a first through hole (61) for passing the stirring shaft (5) is provided on the toothed disc (6); The second gear (8) is connected to the second power output shaft (9) of the second motor.

11. A device for preparing water-soluble curcumin powder according to claim 10, characterized in that, The toothed disc (6) is provided with a second through hole (62) for passing through the other end of the U-shaped tube (21).

12. A water-soluble curcumin powder preparation device according to claim 1, characterized in that, A water inlet (23) and a water outlet (24) are respectively provided at the two ends of the U-shaped tube (21), and the water inlet (23) and the water outlet (24) are placed on the outside of the top of the mixing tank (1).

13. A water-soluble curcumin powder preparation device according to claim 1, characterized in that, The stirring blade (4) and the cooling cylinder (3) are detachably connected.

14. A water-soluble curcumin powder preparation device according to claim 1, characterized in that, The outer wall of the mixing tank (1) is provided with a heat-insulating layer.

15. A device for preparing water-soluble curcumin powder according to claim 1, characterized in that, Also included is a control unit, the control unit including a controller, a temperature sensor, a camera unit, a valve group, a first motor and a second motor; The temperature sensor is used to collect the temperature of the aqueous solution in real time and transmit the collected temperature to the controller; The camera unit is used to collect the relative positions of the cooling pipe (2) and the stirring blade (4) in the mixing tank (1), and transmit the collected positions to the controller; The controller is used to control the opening and closing and opening degree of the valve group, control the start and stop of the first motor, and control the start and stop and forward and reverse rotation of the second motor; The valve group is used to connect the interlayer (11), the cooling cylinder (3) and the cooling pipe (2) with an external cooling unit for providing a cooling medium; The first motor is used to drive the stirring shaft (5) to rotate; The second motor is used to drive the transmission mechanism to perform transmission.

16. A method for preparing water-soluble curcumin powder, characterized in that: The preparation method is implemented based on the water-soluble curcumin powder preparation device according to any one of claims 1 to 15, and comprises the following steps: S1. Preparation of aqueous solution: the mixing tank (1) is placed in a stirring state; maltodextrin, gum arabic and xanthan gum are added to the mixing tank (1) in proportion, and then pure water at 40°C is added and stirred for 1-2 hours until the maltodextrin, gum arabic and xanthan gum are completely dispersed and dissolved to obtain the aqueous solution; then the cooling tube (2) is rotated to place the mixing tank (1) in a refrigerated state, and a cooling medium is introduced into the interlayer (11), the cooling cylinder (3) and the cooling tube (2) to make the temperature of the aqueous solution 2-8°C, and the mixture is refrigerated for 24 hours; S2, turmeric oil dispersion: introducing the refrigerated aqueous solution into the high-speed dispersion mechanism (200), adding turmeric oil and stirring at high speed to uniformly disperse the turmeric oil; S3. Adding and dispersing curcumin: Using ultrafine grinding technology to process curcumin to ensure that its particle size reaches the micrometer or nanometer level, and then adding it to the system prepared in step S2, and stirring at high speed to form a preliminarily uniformly dispersed system; S4, ultrasonic homogenization: introducing the system prepared in step S3 into the ultrasonic crushing mechanism (300) for homogenization until a nano-dispersion liquid with uniform particle size is formed; S5. Freeze-drying: placing the nano-dispersion liquid in the freeze dryer (400) for freeze-drying to obtain water-soluble curcumin powder.

17. The preparation method according to claim 16, characterized in that In steps S2 and S3, the rotation speed of high-speed stirring is 8000-8500 r / min; in step S4, when ultrasonic homogenization is performed, the power of the ultrasonic wave is 100 W, and the process is performed alternately in a 2-second working and 3-second pause mode.

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