Continuous online powder-liquid jet shock wave mixing batching system

Abstract

The invention relates to a continuous on-line powder-liquid jet shock wave mixing batching system which comprises a powder-liquid mixing pump, a buffer tank, a booster pump and an on-line jet shock wave mixer, an inlet of the powder-liquid mixing pump is used for feeding, an outlet of the powder-liquid mixing pump is connected with an inlet of the buffer tank, an outlet of the buffer tank is connected with an inlet of the booster pump, and an outlet of the booster pump is connected with an outlet of the on-line jet shock wave mixer. An outlet of the booster pump is connected with an inlet of the on-line jet flow shock wave mixer, and an outlet of the on-line jet flow shock wave mixer is used for discharging. According to the online jet flow shock wave mixer disclosed by the invention, powder liquid passes through the resonant cavity and the vortex channel cavity in the online jet flow shock wave mixer in sequence to be subjected to high-speed vortex for multiple times, so that the effects of sufficient dissolution and uniform dispersion are realized; when the powder liquid flows through a step-by-step expansion channel formed between the inclined side face of the shock wave cone and the sawtooth-shaped structure on the inclined inner wall of the diffusion cavity at a high speed, the fluid can be promoted to generate ultrasonic self-excited vibration, and the dissolving, dispersing and mixing effects of the powder liquid are further promoted.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of food ingredients, and specifically relates to a continuous online powder-liquid jet shock wave mixing ingredient system. BACKGROUND

[0002] The powder-liquid mixing ingredient system plays a crucial role in dairy and beverage processing production lines and is one of the key steps to ensure product quality and stability. Although the mixing ingredient system attracts many manufacturers into this field due to its wide applicability and relatively low technical barriers, it also leads to serious product homogenization and fierce market competition in the industry. At the same time, some large international food equipment suppliers tend to focus their resources on developing core equipment with higher technical content and added value, and their research and development investment in auxiliary equipment such as the mixing ingredient system is relatively limited, which to some extent restricts the technical innovation and development in this field.

[0003] The current mainstream mixing ingredient equipment mainly relies on traditional mechanical mixing methods, such as low-shear mixers, high-shear dispersers, and online shear pumps. Although these devices can meet the basic mixing requirements, they still face many challenges in actual application. For example, a large number of air bubbles are easily generated during stirring, leading to a decrease in product quality; it is difficult to achieve uniform dispersion for some complex colloidal systems; the emulsification effect is not satisfactory; and more manual operations are needed to adjust parameters, increasing the complexity of production. In addition, the existing powder dissolution and dispersion methods mostly adopt batch processing, which is completed by long-time shearing and stirring in a large container. This method is not suitable for small-scale production needs and results in high cleaning costs due to frequent batch changes. Especially for powder materials that are prone to caking or difficult to disperse, additional heating and high-speed circulation shearing processes are often required to ensure complete dissolution and dispersion, which undoubtedly increases equipment investment and energy consumption.

[0004] Chinese Utility Model Patent No. CN2202583Y relates to a sound resonance cavity type jet emulsifier composed of a nozzle, a suction chamber, and an expansion pipe, which belongs to a jet mixing and emulsifying device in the field of acoustics. It includes a nozzle, a suction chamber, a throat pipe, a sound resonance cavity, and an expansion pipe. The front end of the sound resonance cavity body is connected to the throat pipe, and the rear end is connected to the expansion pipe. The front end of the throat pipe is connected to the nozzle and the suction chamber. The suction chamber is connected to a suction pipe on one side. This utility model has the characteristics of simple structure, easy operation, good emulsification effect, and strong practicality. However, this technical solution is only suitable for liquid-liquid mixing and emulsification and relies on sound resonance cavity for one-time emulsification oscillation of the mixed fluid. Therefore, it still needs to be further improved when used for powder-liquid mixing, as the dissolution and dispersion effect is not sufficient. SUMMARY

[0005] To address the aforementioned problems in the prior art, this invention provides a continuous online powder-liquid jet shock wave mixing and batching system for fully dissolving and uniformly dispersing powder in a liquid. The system includes a powder-liquid mixing pump, a buffer tank, a booster pump, and an online jet shock wave mixer. The inlet of the powder-liquid mixing pump is used for feeding, the outlet of the powder-liquid mixing pump is connected to the inlet of the buffer tank, the outlet of the buffer tank is connected to the inlet of the booster pump, the outlet of the booster pump is connected to the inlet of the online jet shock wave mixer, and the outlet of the online jet shock wave mixer is used for discharging.

[0006] Preferably, the online jet shock mixer includes a body, a resonant cavity jet inlet, a resonant cavity, a resonant cavity outlet, a vortex cavity, a shock cone, a support rod, and a vortex cavity outlet. The body is a hollow structure with the resonant cavity jet inlet and the vortex cavity outlet at both ends. The resonant cavity jet inlet is connected to the outlet of the booster pump. The resonant cavity and the vortex cavity are sequentially arranged in the internal cavity of the body extending horizontally from the resonant cavity jet inlet to the vortex cavity outlet. The resonant cavity and the vortex cavity are connected through the resonant cavity outlet. The shock cone is installed inside the vortex cavity.

[0007] Furthermore, the vortex cavity includes a diffusion cavity and a vortex cavity. The shock cone is installed at a radially centered position in the diffusion cavity. The small end of the shock cone is located on the outlet side of the resonant cavity, and the large end of the shock cone is located on the outlet side of the vortex cavity. The inclined side of the shock cone is fixedly connected to the inner wall of the vortex cavity near the large end by the support rod. A powder-liquid channel is provided between the inclined side of the shock cone and the inclined inner wall of the diffusion cavity, and the inclined side and the inclined inner wall have the same inclination angle. The inclined inner wall of the diffusion cavity has a serrated structure along the fluid movement direction.

[0008] This invention achieves a uniform and symmetrical fluid flow by placing the shock cone at a radially centered position within the diffusion cavity.

[0009] Furthermore, the shock cone is a shock frustum, with the small circular end face of the shock frustum located on the outlet side of the resonant cavity, and the large circular end face of the shock frustum located on the outlet side of the vortex cavity. The inclined side of the shock frustum is fixedly connected to the inner wall of the vortex cavity by the support rod.

[0010] Furthermore, the shock cone is a shock cone body, with the tip of the shock cone located on the outlet side of the resonant cavity and the bottom of the shock cone located on the outlet side of the vortex cavity. The inclined side of the shock cone is fixedly connected to the inner wall of the vortex cavity by the support rod.

[0011] Furthermore, the ratio of the resonant cavity diameter to the resonant cavity jet inlet diameter is greater than 2.

[0012] Further, the diameter of the outlet of the resonant cavity is larger than the diameter of the jet inlet of the resonant cavity.

[0013] Further, the diameter of the outlet of the vortex cavity is larger than the diameter of the outlet of the resonant cavity.

[0014] Further, the support rods are distributed along the circumferential direction of the vortex cavity, and at least three support rods are arranged to ensure that the shock cone is located at the radial center of the diffusion cavity and is uniformly stressed.

[0015] Further, the outlet of the booster pump is connected in series or parallel with at least two online jet shock mixers.

[0016] The present application can further improve the effect of fully dissolving and uniformly dispersing the powder liquid by arranging the series online jet shock mixers.

[0017] The present application can further improve the effect of fully dissolving and uniformly dispersing the powder liquid by arranging the parallel online jet shock mixers.

[0018] Further, the buffer tank is a vertical buffer tank, the vertical buffer tank is open at the top and is provided with a vertical low-speed stirrer, the vertical low-speed stirrer comprises a motor, a speed reducer, a rack, a shaft coupling, a stirring shaft and a paddle, the rack is installed at the top opening of the vertical buffer tank, the rack is provided with the speed reducer at the top, the speed reducer is provided with the motor at the top, the speed reducer is connected with the stirring shaft through the shaft coupling, and the paddle is installed at the front end of the stirring shaft.

[0019] The vertical low-speed stirrer is used to prevent the solid particles from precipitating.

[0020] Further, the buffer tank is a horizontal buffer tank, and the horizontal buffer tank is open at one end and is provided with a horizontal low-speed stirrer.

[0021] The horizontal low-speed stirrer is used to prevent the solid particles from precipitating.

[0022] This invention involves initially dissolving and dispersing a powder-liquid mixture using a powder-liquid mixing pump, then conveying it to a buffer tank. After being pressurized by a booster pump, the mixture is passed through multiple high-speed eddies in the resonant cavity and vortex cavity of an online jet shock mixer to achieve thorough dissolution and uniform dispersion. Particularly within the vortex cavity equipped with a shock cone, the powder-liquid flows at high speed through a progressively expanding channel formed between the inclined side of the shock cone and the serrated structure on the inclined inner wall of the diffuser cavity. Due to the periodic scaling changes of the cross-section of this progressively expanding channel (contraction-expansion-contraction-expansion), the fluid generates ultrasonic self-excited vibrations, further promoting the dissolution and dispersion of the powder-liquid mixture. Specifically, the powder-liquid mixture, after repeated impacts through this progressively expanding channel, forms ultrasonic shock waves, further enhancing the dissolution and dispersion effect. Subsequently, as the liquid flows through the bottom of the large end of the shock cone, it again generates high-speed eddies for thorough dissolution and dispersion before exiting through the vortex cavity outlet, achieving a complete dissolution and uniform dispersion. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a preferred embodiment of the continuous online powder-liquid jet shock wave mixing and batching system of the present invention; Figure 2 This is a schematic diagram of a series connection structure of two online jet shock mixers in a preferred embodiment of the continuous online powder-liquid jet shock wave mixing and batching system of the present invention; Figure 3 This is a schematic diagram of a parallel structure of two online jet shock wave mixers in a preferred embodiment of the continuous online powder-liquid jet shock wave mixing and batching system of the present invention; Figure 4 This is a full cross-sectional view of a preferred embodiment of the online jet shock wave mixer in the continuous online powder-liquid jet shock wave mixing and batching system of the present invention. Figure 5 This is a three-dimensional cross-sectional view of a preferred embodiment of the online jet shock wave mixer in the continuous online powder-liquid jet shock wave mixing and batching system of the present invention. Figure 6 For the present invention Figure 4 and Figure 5 The diagram shows the internal structure of the linear jet shock wave mixer and the simulated streamline diagram of powder-liquid motion. Figure 7 This is a full cross-sectional view of a preferred embodiment of the online jet shock wave mixer in a preferred embodiment of the continuous online powder-liquid jet shock wave mixing and batching system of the present invention; Figure 8 This is a three-dimensional cross-sectional view of a preferred embodiment of the online jet shock wave mixer in a preferred embodiment of the continuous online powder-liquid jet shock wave mixing and batching system of the present invention; Figure 9 This is a graph showing the particle size distribution coordinates after mixing in Example 1 of the present invention and a comparative example. Figure 10The dissolution and dispersion effect comparison chart of the embodiment 1 and the comparative example of the application is shown in the following table.

[0024] Fig. 1 is a schematic diagram of the continuous online powder-liquid jet shock wave mixing and dosing system of the application, wherein 1 is a powder-liquid mixing pump, 2 is a vertical buffer tank, 201 is a vertical low-speed stirrer, 2011 is a motor, 2012 is a frame, 2013 is a stirring shaft, 2014 is a paddle, 3 is a booster pump, 4 is an online jet shock wave mixer, 401 is a resonant cavity jet inlet, 402 is a resonant cavity, 403 is a resonant cavity outlet, 404 is a vortex cavity, 4041 is a diffusion cavity, 4042 is a vortex cavity, 405 is a shock wave cone, 406 is a vortex cavity outlet, 407 is a support rod, 408 is a body, and 409 is a shock wave cone. DETAILED DESCRIPTION

[0025] The preferred embodiments of the application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the application, and are not used to limit the application.

[0026] To solve the above-mentioned problems of the prior art, the application provides a continuous online powder-liquid jet shock wave mixing and dosing system, as shown in Fig. 1, which comprises a powder-liquid mixing pump 1, a buffer tank, a booster pump 3 and an online jet shock wave mixer 4. Figure 1 The inlet of the powder-liquid mixing pump 1 is used for feeding, the outlet of the powder-liquid mixing pump 1 is connected with the inlet of the buffer tank, the outlet of the buffer tank is connected with the inlet of the booster pump 3, the outlet of the booster pump 3 is connected with the inlet of the online jet shock wave mixer 4, and the outlet of the online jet shock wave mixer 4 is used for discharging.

[0027] Optionally, as shown in Fig. 4, the online jet shock wave mixer 4 comprises a body 408, a resonant cavity jet inlet 401, a resonant cavity 402, a resonant cavity outlet 403, a vortex cavity 404, a shock wave cone, a support rod 407 and a vortex cavity outlet 406. Figures 4 to 8 The body 408 is a hollow structure, and the resonant cavity jet inlet 401 and the vortex cavity outlet 406 are respectively arranged at two ends of the body 408, the resonant cavity jet inlet 401 is connected with the outlet of the booster pump 3, the resonant cavity 402 and the vortex cavity 404 are sequentially arranged in the internal cavity of the body 408 between the resonant cavity jet inlet 401 and the vortex cavity outlet 406, the resonant cavity 402 and the vortex cavity 404 are connected and communicated through the resonant cavity outlet 403, and the shock wave cone is arranged in the vortex cavity 404.

[0028] Optionally, as shown in Fig. 5, the body 408 of the online jet shock wave mixer 4 is provided with a plurality of diffusion cavities 4041. Figure 4 , Figure 5 , Figure 7 and Figure 8As shown in the figure, the vortex cavity 404 includes a diffusion cavity 4041 and a vortex cavity 4042, the radial center position in the diffusion cavity 4041 is equipped with the shock cone, the small end of the shock cone is located on the side of the resonant cavity outlet 403, the large end of the shock cone is located on the side of the vortex cavity outlet 406, the inclined side of the shock cone is fixedly connected between the inner wall of the vortex cavity 4042 through the support rod 407 near the large end, the inclined side of the shock cone and the inclined inner wall of the diffusion cavity 4041 are provided with a powder-liquid channel, and the inclination angles of the inclined side and the inclined inner wall are consistent, and the inclined inner wall of the diffusion cavity 4041 is provided with a zigzag structure along the fluid motion direction.

[0029] The preferred scheme can realize the uniform and symmetrical effect of fluid flow by arranging the shock cone at the radial center position in the diffusion cavity 4041.

[0030] Optionally, as shown in the figures Figure 4 , Figure 5 and Figure 6 , the shock cone adopts a shock round truncated cone body 405, the small circular end face of the shock round truncated cone body 405 is located on the side of the resonant cavity outlet 403, the large circular end face of the shock round truncated cone body 405 is located on the side of the vortex cavity outlet 406, and the inclined side of the shock round truncated cone body 405 is fixedly connected between the inner wall of the vortex cavity through the support rod 407.

[0031] Optionally, as shown in the figures Figure 7 and Figure 8 , the shock cone adopts a shock round truncated cone body 409, the tip of the shock round truncated cone body 409 is located on the side of the resonant cavity outlet 403, the bottom of the shock round truncated cone body 409 is located on the side of the vortex cavity outlet 406, and the inclined side of the shock round truncated cone body 409 is fixedly connected between the inner wall of the vortex cavity through the support rod 407.

[0032] Optionally, as shown in the figure Figures 4 to 8 , the ratio of the diameter of the resonant cavity 402 to the diameter of the resonant cavity jet inlet 401 is greater than 2.

[0033] Optionally, as shown in the figure Figures 4 to 8 , the diameter of the resonant cavity outlet 403 is greater than the diameter of the resonant cavity jet inlet 401.

[0034] Optionally, as shown in the figure Figures 4 to 8 , the diameter of the vortex cavity outlet 406 is greater than the diameter of the resonant cavity outlet 403.

[0035] Optionally, as shown in the figures Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, the support rods 407 are distributed along the circumferential direction within the vortex chamber 4042, and at least three are distributed to ensure that the shock cone is located at the radial center position within the diffusion chamber 4041 and is uniformly stressed.

[0036] Optionally, as shown in Figure 2 and Figure 3 The booster pump 3 outlet is connected in series or parallel with at least two online jet shock mixers 4.

[0037] The preferred scheme can further improve the effect of fully dissolving and uniformly dispersing the powder liquid by arranging the series online jet shock mixers 4.

[0038] The preferred scheme can further improve the effect of fully dissolving and uniformly dispersing the powder liquid by arranging the parallel online jet shock mixers 4.

[0039] Optionally, as shown in Figure 1 , Figure 2 and Figure 3 The buffer tank adopts a vertical buffer tank 2, the vertical buffer tank 2 is opened at the top and is provided with a vertical low-speed stirrer 201, the vertical low-speed stirrer 201 includes a motor 2011, a speed reducer, a rack 2012, a shaft coupling, a stirring shaft 2013 and a paddle 2014, the rack 2012 is installed at the top opening of the vertical buffer tank 2, the rack 2012 is provided with the speed reducer at the top, the speed reducer is provided with the motor 2011 at the top, the speed reducer output is connected with the stirring shaft 2014 through the shaft coupling 2013, and the stirring shaft 2014 is provided with the paddle 2015 at the front end.

[0040] Optionally, the buffer tank adopts a horizontal buffer tank, and the horizontal buffer tank is opened at one end and is provided with a horizontal low-speed stirrer.

[0041] The embodiment 1 process steps according to the above preferred scheme are as follows: 1) Mix the powder in the following mass ratio: white sugar 90; whey protein powder 4; acetylated distarch phosphate 15; pectin 1; 2) The mixed powder and milk are quantitatively added to the powder-liquid mixing pump 1 for online mixing according to the powder-liquid mass ratio of 1:9; 3) The mixed powder-liquid enters the buffer tank for stirring and buffering; 4) The powder-liquid is pressurized to 4 bar by the booster pump 3 and then enters the online jet shock mixer 4 to realize dissolution and dispersion.

[0042] The comparative embodiment process steps according to the existing conventional mechanical stirring and mixing are as follows: 1) Weigh out 90 kg of white sugar, 4 kg of whey protein powder, 15 kg of acetylated distarch phosphate, and 1 kg of pectin and mix them evenly; 2) Add the mixed powder to a mixing tank containing 990kg of milk and mix for 30 minutes.

[0043] like Figure 9 As shown, the particle size detection results of the mixture after mixing Example 1 and the comparative example show that the particle size of the powder-liquid mixture after mixing in Example 1 is significantly smaller, indicating a better mixing effect. In contrast, the comparative example contains large particles of 50-500 micrometers, indicating that the mixture was not uniform.

[0044] like Figure 10 As shown, the sample in Example 1 was relatively uniform, with no large particles remaining. In contrast, the comparative example still contained larger particles, which were incompletely dissolved and dispersed pectin components. Comparing Example 1 with the comparative example, it can be seen that: First, Example 1 only requires a buffer tank, with a volume only one-tenth that of the comparative example, and does not require expensive high-shear equipment, thus significantly reducing equipment investment; Second, the consumption of cleaning water and cleaning agents during product changeover cleaning is also greatly reduced; Third, during material preparation, Example 1 does not require heating the liquid, while the comparative example requires heating the liquid to achieve better dissolution, resulting in significantly higher energy consumption than Example 1; Finally, the online jet shock wave mixer 4 of Example 1 has a more thorough dispersion and mixing effect compared to existing mechanical stirring methods, that is, the particle size after mixing is smaller and the mixing and dispersion are more uniform.

[0045] The above-described technical solutions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A continuous online powder-liquid jet shock wave mixing and batching system, characterized in that, The system includes a powder-liquid mixing pump (1), a buffer tank, a booster pump (3), and an online jet shock mixer (4). The inlet of the powder-liquid mixing pump (1) is used for feeding, the outlet of the powder-liquid mixing pump (1) is connected to the inlet of the buffer tank, the outlet of the buffer tank is connected to the inlet of the booster pump (3), the outlet of the booster pump (3) is connected to the inlet of the online jet shock mixer (4), and the outlet of the online jet shock mixer (4) is used for discharging.

2. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 1, characterized in that, The online jet shock mixer (4) includes a body (408), a resonant cavity jet inlet (401), a resonant cavity (402), a resonant cavity outlet (403), a vortex cavity (404), a shock cone, a support rod (407), and a vortex cavity outlet (406). The body (408) is a hollow structure with the resonant cavity jet inlet (401) and the vortex cavity outlet (406) respectively at both ends. The resonant cavity jet inlet (401) is connected to the outlet of the booster pump (3). The resonant cavity (402) and the vortex cavity (404) are sequentially arranged in the cavity inside the body (408) between the resonant cavity jet inlet (401) and the vortex cavity outlet (406). The resonant cavity (402) and the vortex cavity (404) are connected through the resonant cavity outlet (403). The shock cone is installed inside the vortex cavity (404).

3. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 2, characterized in that, The vortex cavity (404) includes a diffusion cavity (4041) and a vortex cavity (4042). The shock cone is installed in the radial center of the diffusion cavity (4041). The small end of the shock cone is located on the side of the resonant cavity outlet (403), and the large end of the shock cone is located on the side of the vortex cavity outlet (406). The inclined side of the shock cone is fixedly connected to the inner wall of the vortex cavity (4042) near the large end by the support rod (407). A powder-liquid channel is provided between the inclined side of the shock cone and the inclined inner wall of the diffusion cavity (4041), and the inclined side and the inclined inner wall have the same inclination angle. The inclined inner wall of the diffusion cavity (4041) has a sawtooth structure along the fluid movement direction.

4. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 3, characterized in that, The shock cone is a shock frustum (405). The small circular end face of the shock frustum (405) is located on the side of the resonant cavity outlet (403), and the large circular end face of the shock frustum (405) is located on the side of the vortex cavity outlet (406). The inclined side of the shock frustum (405) is fixedly connected to the inner wall of the vortex cavity by the support rod (407).

5. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 3, characterized in that, The shock cone is a shock cone (409). The tip of the shock cone (409) is located on the side of the resonant cavity outlet (403), and the bottom of the shock cone (409) is located on the side of the vortex cavity outlet (406). The inclined side of the shock cone (409) is fixedly connected to the inner wall of the vortex cavity by the support rod (407).

6. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 2, characterized in that, The ratio of the diameter of the resonant cavity (402) to the diameter of the resonant cavity jet inlet (401) is greater than 2.

7. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 2, characterized in that, The diameter of the resonant cavity outlet (403) is larger than the diameter of the resonant cavity jet inlet (401).

8. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 2, characterized in that, The diameter of the vortex cavity outlet (406) is larger than the diameter of the resonant cavity outlet (403).

9. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 3, characterized in that, At least three support rods (407) are evenly distributed along the circumferential direction within the vortex cavity (4042).

10. The continuous online powder-liquid jet shock wave mixing and batching system according to claim 1, characterized in that, The outlet of the booster pump (3) is connected in series or in parallel with at least two of the online jet shock mixers (4).

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