Solid-liquid mixing device and solid-liquid mixing system

Abstract

The present application provides a solid-liquid mixing device and a solid-liquid mixing system. The solid-liquid mixing device comprises: a housing, the housing being provided with a material mixing cavity for mixing materials; and an impeller rotatably arranged in the mixing cavity, wherein one of the impeller and the housing is provided with a plurality of circumferentially arranged flow channels, blades are arranged between the flow channels, the blades are provided with shear grooves that are circumferentially arranged, the other one of the impeller and the housing is provided with shear teeth, the shear teeth pass through the flow channels and the shear grooves when the impeller rotates, and the impeller is further provided with flow guide holes passing through the impeller and communicated with the flow channels. The present application solves the problem in the prior art of poor slurry mixing effect of powder-liquid mixing devices.

Description

Solid-liquid mixing device and solid-liquid mixing system

[0001] The present application claims priority to the patent application with the application number 202411370880.1, filed on September 27, 2024, to the State Intellectual Property Office of China, and the title of "Solid-liquid mixing device and solid-liquid mixing system", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of solid-liquid mixing, in particular to a solid-liquid mixing device and a solid-liquid mixing system. BACKGROUND

[0003] In the processing of industrial raw materials, the powder-liquid mixing process is essential, and how to obtain uniformly mixed raw materials is the most important in this process. In the emerging industries such as lithium batteries, most of the powders are ultra-fine or nano-level powders, and a large amount of air is trapped between the material surface and the material. When mixed with liquid, the powder wrapped and trapped by gas will form clumps and blocks, and cannot be well mixed with liquid. If mixing is performed at this time, the clumped material cannot be well dispersed, and finally the finished slurry is not uniformly mixed and the quality is not qualified.

[0004] Nowadays, the industry usually uses a scheme that sets a trajectory for the liquid inlet to evenly divide the solvent into multiple parts and send it into the mixing cavity, and then uses a feeding screw to quantitatively send the powder into the mixing cavity. The air in the powder surface and gaps is first discharged in the micro-negative pressure mixing cavity through negative pressure and rotation. The two materials are in contact and fully infiltrated in the mixing cavity, and then a high-speed motor is used to drive the rotor to generate a high tangential speed, forming a large speed gradient between the stator and the rotor, and the inter-cavity kinetic energy caused by high-frequency mechanical effect, so that the material in the gap between the stator and the rotor receives strong shearing, extrusion, friction and other actions, thereby obtaining a uniformly and finely dispersed and mixed scheme. However, the existing scheme still has the problem of poor mixing effect of slurry. These insufficiently kneaded slurries directly enter the next link, which will cause the finished slurry to be not uniform or increase the time to reach the standard viscosity, and the dispersion efficiency is also not high enough. SUMMARY

[0005] The main purpose of the present application is to provide a solid-liquid mixing device and a solid-liquid mixing system to solve the problem of poor mixing effect of slurry of the powder-liquid mixing device in the prior art.

[0006] In order to achieve the above object, according to one optional embodiment of the present application, a solid-liquid mixing device is provided, comprising: a casing, the casing having a mixing cavity for mixing; an impeller rotatably arranged in the mixing cavity, one of the impeller and the casing having a plurality of circumferentially arranged flow channels, blades being arranged between the flow channels, the blades having shear grooves, the shear grooves being circumferentially arranged, the other of the impeller and the casing having shear teeth, the shear teeth passing through the flow channels and the shear grooves when the impeller rotates, the impeller further having a guide hole penetratingly arranged and communicating with the flow channels.

[0007] In one optional embodiment, the impeller has a first side and a second side in the axial direction, the first side and the second side are both provided with the flow channels and the shear teeth, the flow channels of the first side and the flow channels of the second side are respectively for passing different materials to be mixed.

[0008] In one optional embodiment, the guide hole penetrates the first side and the second side and communicates with the flow channels of the first side and the flow channels of the second side.

[0009] In one optional embodiment, the first side includes an arc segment and a straight segment, the arc segment is located in the inner circle of the straight segment, and in the direction close to the central axis of the impeller, the arc segment extends away from the second side, the blade includes a first section located in the arc segment and a second section located in the straight segment, and the shear groove is located in the second section.

[0010] In one optional embodiment, the shear grooves of the first side and the shear grooves of the second side are arranged in alignment in the axial direction of the impeller.

[0011] In one optional embodiment, the guide hole is located in the straight segment.

[0012] In one optional embodiment, the surface of the impeller has the flow channels and the blades, the blades extend along the surface of the impeller and form an angle with the axis of the impeller, the inner wall of the mixing cavity has the shear teeth, the shear teeth are a plurality of, and the shear teeth are arranged on the inner walls of the opposite ends of the mixing cavity.

[0013] In one optional embodiment, a plurality of shear teeth are arranged on the inner walls of the opposite ends of the mixing cavity, and the shear teeth on the inner walls are arranged in the circumferential direction of the impeller.

[0014] In one optional embodiment, at least part of the blades are in a spiral structure in the circumferential direction of the impeller.

[0015] In an alternative embodiment, the casing comprises a casing part, an upper stator and a middle stator, the casing part has a receiving cavity, the upper stator and the middle stator are located in the receiving cavity, the middle stator divides the receiving cavity into an axially arranged mixing cavity and a dispersion cavity, the upper stator and the middle stator form the mixing cavity, the inner ring of the middle stator has a middle flow channel connecting the mixing cavity and the dispersion cavity, and the surfaces of the upper stator and the middle stator facing the mixing cavity have shear grooves or shear teeth.

[0016] In an alternative embodiment, the casing further comprises a lower stator, the lower stator is arranged in the casing part, the lower stator is located on the side of the middle stator away from the upper stator, and the dispersion cavity is formed between the lower stator and the middle stator, and the inner ring of the lower stator has a lower flow channel connecting the dispersion cavity; the solid-liquid mixing device further comprises a rotor, the rotor is rotatably arranged in the dispersion cavity, and a flow passage is formed between the circumferential edge of the rotor and the circumferential side wall of the dispersion cavity, the rotor has a first surface facing the middle stator and a second surface facing the lower stator, one of the surface of the middle stator facing the rotor and the first surface has a first annular protrusion, the first annular protrusion has a first shear flow channel passing through in the radial direction, the other of the surface of the middle stator facing the rotor and the first surface has a first shear protrusion, one of the surface of the lower stator facing the rotor and the second surface has a second annular protrusion, the second annular protrusion has a second shear flow channel passing through in the radial direction, and the other of the surface of the lower stator facing the rotor and the second surface has a second shear protrusion, when the rotor rotates, the first shear protrusion can switch between positions shielding and avoiding the first shear flow channel, and the second shear protrusion can switch between positions shielding and avoiding the second shear flow channel.

[0017] In an alternative embodiment, the first annular protrusion is a plurality of and is sequentially sleeved along the radial direction of the rotor, the first shear protrusion is a plurality of, at least part of the first shear protrusions are arranged in the circumferential direction of the rotor to form a first shear protrusion ring, and a first shear protrusion ring is arranged between radially adjacent two first annular protrusions; and / or the second annular protrusion is a plurality of and is sequentially sleeved along the radial direction of the rotor, the second shear protrusion is a plurality of, at least part of the second shear protrusions are arranged in the circumferential direction of the rotor to form a second shear protrusion ring, and a second shear protrusion ring is arranged between radially adjacent two second annular protrusions.

[0018] In an alternative embodiment, at least one of the first shear flow channel and the second shear flow channel forms an included angle with the radial direction of the rotor.

[0019] In an alternative embodiment, the casing part has a solid-state feed port, a liquid-state feed port and a discharge port, the solid-state feed port is located on the side of the mixing cavity away from the dispersion cavity and at the center of the impeller, the liquid-state feed port is located on the side of the dispersion cavity away from the mixing cavity, and the discharge port is located on the circumferential side of the mixing cavity.

[0020] According to an optional embodiment of the present application, a solid-liquid mixing system is provided, comprising the solid-liquid mixing device as described above; a circulating tank, the circulating tank being communicated with the solid-liquid mixing device through a circulating pipeline, the slurry mixed by the solid-liquid mixing device entering into the circulating tank through the circulating pipeline and then entering into the solid-liquid mixing device again through the circulating pipeline.

[0021] In an optional embodiment, the circulating tank is multiple, each of the circulating tanks being communicated with the solid-liquid mixing device through a circulating pipeline, and the circulating tanks being arranged in parallel.

[0022] In an optional embodiment, the solid-liquid mixing system further comprises a kneading device, the kneading device being communicated with the circulating tank and being capable of delivering the preliminarily kneaded slurry into the circulating tank.

[0023] In an optional embodiment, the solid-liquid mixing device, the circulating pipeline and the circulating tank are multiple, the solid-liquid mixing system further comprising multiple circulating processing systems, each of the circulating processing systems comprising a solid-liquid mixing device, a circulating pipeline and a circulating tank, the solid-liquid mixing system further comprising a connecting pipeline, the connecting pipeline being communicated with the multiple circulating processing systems simultaneously so as to communicate the circulating processing systems through the connecting pipeline.

[0024] By means of the technical scheme of the present application, the shearing groove and the shearing teeth arranged between the casing and the impeller can bring about a great kneading effect when the impeller rotates to mix the materials, thus increasing the mixing intensity and the kneading process and improving the mixing effect of the slurry. Specifically, when the powder and the liquid enter into the mixing cavity, the powder and the liquid contact, infiltrate and mix to form a preliminary slurry at the two sides of the impeller and at the flow guide hole. The forced contact, infiltration and mixing at the specified position, i.e. the flow guide hole, are much more efficient than the free contact and mixing at the periphery of the impeller. Meanwhile, the slurry preliminarily infiltrated and mixed is thrown outward under the centrifugal force by the blade due to the rotation of the impeller. At this time, the slurry contacts the shearing groove and the shearing teeth. The shearing groove and the shearing teeth with high-speed relative motion can form a flow disturbance to the slurry, thus increasing the residence time of the slurry in the mixing cavity and further increasing the kneading and mixing effect. The above-mentioned mode avoids the condition that the ordinary impeller can only make the liquid and the powder contact for a short time near the outer ring of the stator by the centrifugal force of the blade, thus resulting in little kneading effect and low efficiency. The above-mentioned mode increases the contact and infiltration time and increases the mixing intensity and the kneading process when the powder and the liquid are mixed, thus improving the quality of the final slurry product and having a positive significance for the improvement of the efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and serve as an explanation of the present application, and do not constitute improper limitations to the present application. In the drawings:

[0026] Fig. 1 shows a structural schematic diagram of a solid-liquid mixing device of the present application;

[0027] Fig. 2 shows a structural schematic diagram of an impeller in Fig. 1;

[0028] Fig. 3 shows a bottom view of the impeller in Fig. 2;

[0029] Fig. 4 shows a structural schematic diagram of a middle stator in Fig. 1;

[0030] Fig. 5 shows a structural schematic diagram of the middle stator in Fig. 4 from another perspective;

[0031] Fig. 6 shows a structural schematic diagram of an upper stator in Fig. 1;

[0032] Fig. 7 shows a sectional view of a lower stator cooperating with a rotor in Fig. 1;

[0033] Fig. 8 shows a structural schematic diagram of a rotor in Fig. 1;

[0034] Fig. 9 shows a structural schematic diagram of another rotor;

[0035] Fig. 10 shows a structural schematic diagram of another lower stator;

[0036] Fig. 11 shows a structural schematic diagram of a solid-liquid mixing system in Embodiment 1;

[0037] Fig. 12 shows a structural schematic diagram of a solid-liquid mixing system in Embodiment 2;

[0038] Fig. 13 shows a structural schematic diagram of a solid-liquid mixing system in Embodiment 3;

[0039] Fig. 14 shows a structural schematic diagram of a solid-liquid mixing system in Embodiment 4.

[0040] In the above figures, the following reference signs are used: 10, casing; 11, mixing cavity; 12, shearing tooth; 13, housing part; 131, solid feed inlet; 132, liquid feed inlet; 133, discharge outlet; 14, upper stator; 141, shearing protrusion; 15, middle stator; 151, first shearing protrusion; 16, dispersion cavity; 17, lower stator; 171, second shearing protrusion; 20, impeller; 21, flow channel; 22, blade; 23, shearing groove; 24, flow guide hole; 25, cambered section; 26, straight section; 30, rotor; 31, flow passage; 32, first annular protrusion; 321, first shearing flow channel; 33, second annular protrusion; 331, second shearing flow channel; 40, circulating tank; 50, circulating pipeline; 60, connecting pipeline; 70, kneading device. DETAILED DESCRIPTION

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] In order to solve the problem of poor mixing effect of the powder-liquid mixing device in the prior art, the present application provides a solid-liquid mixing device and a solid-liquid mixing system.

[0043] Embodiment one

[0044] A solid-liquid mixing device as shown in FIGS. 1 to 8, comprising a casing 10 and an impeller 20, the casing 10 has a mixing cavity 11 for mixing; the impeller 20 is rotatably arranged in the mixing cavity 11, one of the impeller 20 and the casing 10 has a plurality of circumferentially arranged flow channels 21, the flow channels 21 are provided with blades 22, the blades 22 have shear grooves 23, each shear groove 23 is circumferentially arranged, the other of the impeller 20 and the casing 10 has shear teeth 12, the shear teeth 12 pass through each flow channel 21 and each shear groove 23 when the impeller 20 rotates.

[0045] In this embodiment, the shear grooves 23 and the shear teeth 12 are arranged between the casing 10 and the impeller 20, so that when the impeller 20 rotates for mixing, a greater kneading effect can be achieved, the mixing intensity and the kneading process are increased, and thus the mixing effect is improved. Specifically, when the powder and the liquid enter the mixing cavity 11, the powder and the liquid contact, infiltrate and mix to form a preliminary slurry at the two sides of the impeller 20 and at the flow guide holes 24. In this way, forced contact, infiltration and mixing are performed at the specified position, i.e., the flow guide holes 24, and the efficiency is much higher than that of free contact and mixing at the periphery of the impeller 20. At the same time, due to the rotation of the impeller 20, the slurry that has been preliminarily infiltrated and mixed is driven by the blades 22 and thrown outward under the action of centrifugal force. At this time, the slurry will contact the shear grooves 23 and the shear teeth 12. Since the shear grooves 23 and the shear teeth 12 have high-speed relative motion, they will form a noticeable flow disturbance to the slurry, thereby increasing the residence time of the slurry in the mixing cavity 11, and further increasing the kneading and mixing effect. The above-mentioned mode avoids the condition that the ordinary impeller 20 can only use the blades to transport the liquid and the powder to the vicinity of the outer circle of the stator by centrifugal force for short-term powder-liquid contact, resulting in almost no kneading effect and low efficiency. The above-mentioned mode increases the contact and infiltration time during powder-liquid mixing, increases the mixing intensity and the kneading process, improves the quality of the final slurry product, and has a positive significance for the improvement of efficiency.

[0046] As shown in FIG. 2 and FIG. 3, in order to further ensure the sufficiency of the mixing, the embodiment is provided with the shearing teeth 12 and the shearing grooves 23 on both axial sides of the impeller 20, specifically, the impeller 20 has a first side and a second side in the axial direction, and the first side and the second side are both provided with the flow channels 21 and the shearing teeth 12, and the flow channels 21 of the first side and the flow channels 21 of the second side are respectively used for passing the different materials to be mixed. In this way, after the powder and the liquid are preliminarily mixed at the flow guide holes 24, they can be cooperated with the shearing teeth 12 and the shearing grooves 23 on either side of the impeller 20 under the action of the impeller 20, so as to ensure that the slurry can be cooperated with the shearing teeth 12 and the shearing grooves 23 no matter which side the slurry is thrown to under the action of the impeller 20, thereby ensuring the mixing effect of the slurry.

[0047] For the convenience of description, the embodiment takes the flow channels 21 of the first side as the flow channels 21 for the powder to enter and takes the flow channels 21 of the second side as the flow channels 21 for the liquid to enter, and considering the gravity of the liquid, the embodiment takes the lower part of the impeller 20 as the second side and the upper part as the first side. In this way, in use, the powder is added into the first flow channels 21 through the solid feeding port 131 on the upper part of the impeller 20, and the liquid is injected into the second flow channels 21 through the liquid feeding port 132 on the lower part. Of course, the above setting mode can also be adjusted as required, as long as the injection and mixing between the powder and the liquid can be realized.

[0048] Meanwhile, the embodiment adopts the form of providing the flow channels 21, the blades 22 and the shearing grooves 23 on the impeller 20 and providing the shearing teeth 12 in the casing 10, that is, the embodiment is provided with the blades 22 on both upper and lower sides of the impeller 20, the flow channels 21 are formed between the blades 22, the shearing grooves 23 are opened on the blades 22, the top surface and the left and right side surfaces of the shearing grooves 23 of the upper blades 22 are all open, and the bottom surface and the left and right side surfaces of the shearing grooves 23 of the lower blades 22 are all open. In this way, when the impeller 20 rotates, the shearing teeth 12 can rotate relative to the shearing grooves 23, and the shearing teeth 12 can pass through each shearing groove 23 and shuttle between each flow channel 21.

[0049] Since the embodiment is provided with the flow channels 21 on both sides, the flow guide holes 24 substantially penetrate the first side and the second side and are in communication with the flow channels 21 of the first side and the flow channels 21 of the second side. In this way, the powder of the first side and the liquid of the second side can be delivered to the flow guide holes 24 through the respective flow channels 21, so as to be preliminarily mixed at the flow guide holes 24.

[0050] Of course, in addition to the way that the shearing teeth 12 and the shearing grooves 23 are arranged on both sides of the impeller 20, the shearing grooves 23 and the shearing teeth 12 can also be arranged on only one side of the impeller 20, i.e. the shearing grooves 23 and the shearing teeth 12 are arranged on only the first side or the second side, and the arrangement positions of the shearing grooves 23 and the shearing teeth 12 can also be interchanged, i.e. the flow channel 21, the blade 22 and the shearing groove 23 can be arranged on the inner wall of the casing 10, and the shearing teeth 12 are arranged on the impeller 20. In this way, the flow channel 21 for conveying the material is still provided, and the shearing groove 23 and the shearing teeth 12 still cooperate with each other, so that the purpose of improving the mixing effect can also be achieved.

[0051] In the present embodiment, considering that there is a difference between the conveying of the powder and the conveying of the liquid, the first side of the present embodiment is not arranged in a planar form. Specifically, the first side of the present embodiment includes an arc surface section 25 and a straight surface section 26, the arc surface section 25 is located in the inner circle of the straight surface section 26, and in the direction close to the central axis of the impeller 20, the arc surface section 25 extends away from the second side, i.e. the height of the arc surface section 25 at the center of the impeller 20 is higher, and the height of the edge is lower, and the straight surface section 26 is connected with the peripheral edge of the arc surface section 25, so that the first side is formed with a certain curvature. Correspondingly, the blade 22 includes a first section located in the arc surface section 25 and a second section located in the straight surface section 26, so that the shape of the blade 22 is adapted to the shape of the first side. Therefore, the shape of the flow channel 21 between the blades 22 is not planar, but a combination of arc and planar structures. The shearing groove 23 is located in the second section. In this way, on the one hand, the above-mentioned structure of the first side facilitates the conveying of the powder, and on the other hand, since the shearing groove 23 and the shearing teeth 12 are located close to the outer peripheral side of the impeller 20, it is ensured that the slurry under the centrifugal force of the impeller 20 can hit the shearing groove 23 and the shearing teeth 12 with a greater force, thereby improving the mixing effect. At the same time, during rotation, different positions of the blade 22 will form a step speed difference, thereby forming multiple vortexes and turbulent flows, thereby increasing the kneading effect and dispersion efficiency.

[0052] Unlike the form of the first side described above, the surface of the second side of the present embodiment is arranged in a whole planar form, and the liquid flows through the second flow channel 21 from the center of the second side to the outside in the radial direction.

[0053] Of course, the specific structure of the first side and the second side described above can also be adjusted as needed, for example, the first side and the second side can both be arranged in a planar form, or the second side can be arranged in a structure form symmetrical to the first side up and down, etc.

[0054] Preferably, the shearing grooves 23 on the first side and the shearing grooves 23 on the second side of the present embodiment are arranged in axial alignment along the impeller 20. Correspondingly, the shearing teeth 12 on the opposite inner walls of the casing 10 are also arranged in axial alignment, so as to ensure that the shearing grooves 23 and the shearing teeth 12 are in alignment in the vertical direction, thereby ensuring that the turbulence effect on the slurry is stable and uniform.

[0055] Since the shearing grooves 23 are located on the straight surface section 26, the present embodiment also provides the flow guide holes 24 on the straight surface section 26, so that the positions of the shearing grooves 23 correspond to the positions of the flow guide holes 24. The present embodiment preferably arranges the shearing grooves 23 and the flow guide holes 24 in circumferential alignment along the impeller 20, i.e. the flow guide holes 24 are located between circumferentially adjacent shearing grooves 23, so as to ensure that the initially mixed slurry can be subjected to the action of the shearing grooves 23 and the shearing teeth 12 and be fully mixed, thereby ensuring the mixing effect. At the same time, the thickness of the straight surface section 26 of the impeller 20 is thinner than that of the curved surface section 25, so as to facilitate the processing of the flow guide holes 24.

[0056] In the present embodiment, due to the arrangement of the first side of the impeller 20 as described above, when the blades 22 on the first side extend along the surface of the impeller 20, the blades 22 form an angle with the axis of the impeller 20, and the angle is not 90 degrees, so that the shape of the blades 22 matches the arrangement of the first side. Of course, when the shape of the first side is adjusted, for example, the first side is arranged as a plane, the form of the blades 22 can also be adjusted accordingly, as long as it matches the arrangement of the first side. Similarly, the arrangement of the blades 22 on the second side can also match the form of the second side.

[0057] Optionally, the number of shearing teeth 12 can be arranged as needed, and one or more shearing teeth 12 can be arranged on one side of the impeller 20. Considering the mixing effect, the present embodiment preferably arranges the shearing teeth 12 as multiple, and the inner walls of the opposite ends of the mixing chamber 11, i.e. the upper and lower sides of the impeller 20, are provided with shearing teeth 12. The positions of the shearing teeth 12 on the inner walls of the opposite ends of the mixing chamber 11, i.e. the positions of the upper and lower sides of the impeller 20, are respectively provided with multiple shearing teeth 12, and the shearing teeth 12 on each side are arranged in circumferential spacing along the impeller 20, thereby forming a ring-shaped arrangement, which can cooperate with the form of the shearing grooves 23 to ensure the mixing effect.

[0058] At least part of the blades 22 of the embodiment is in a helical structure along the circumference of the impeller 20. Specifically, since the first side flow channel 21 of the embodiment is used for powder conveying, the first side impeller 20 of the embodiment is arranged in a helical structure, and the helical structure is in the same direction as the rotation direction of the impeller 20, so that the blades 22 can further improve the centrifugal force of the slurry, thereby improving the mixing effect. Of course, the shape of the blades 22 can also be arranged in a straight line or other forms. The second side blades 22 can be arranged to extend radially or spirally. The first side blades 22 and the second side blades 22 of the embodiment are preferably both in a helical shape, and the twist angles of the two are different, so that the slurry falling from the lower part can be sucked and the powder falling from the upper part can be brought to the circumferential edge.

[0059] As shown in FIG. 1, in the embodiment, the casing 10 includes a housing portion 13, an upper stator 14 and a middle stator 15, the housing portion 13 has a receiving cavity, the upper stator 14 and the middle stator 15 are fixedly arranged in the receiving cavity, and the middle stator 15 divides the receiving cavity into an axially arranged mixing cavity 11 and a dispersion cavity 16. The mixing cavity 11 is formed by the upper stator 14 and the middle stator 15, and the mixing cavity 11 is arranged above and the dispersion cavity 16 is arranged below in the embodiment, and of course, more cavities can be added as needed. Since the middle stator 15 is the main component for separating the mixing cavity 11 and the dispersion cavity 16, the middle stator 15 of the embodiment cooperates with the upper stator 14 above and the rotor 30 below. Based on this, the inner ring of the middle stator 15 of the embodiment has a middle flow channel that communicates the mixing cavity 11 and the dispersion cavity 16, so that the liquid in the dispersion cavity 16 below can enter the inlet at the center of the flow channel of the second side flow channel 21 of the impeller 20, then flow radially to the edge of the impeller 20, and preliminarily mix with the powder at the flow guide hole 24, and fully mix under the action of the shear teeth 12 and the shear groove 23, and then be discharged from the discharge port 133 on the side of the mixing cavity 11. As shown in FIGS. 4 to 6, since the mixing cavity 11 is formed by the upper stator 14 and the middle stator 15, the surfaces of the upper stator 14 and the middle stator 15 towards the mixing cavity 11 have shear teeth 12, so as to cooperate with the shear grooves 23 on both sides of the impeller 20.

[0060] As shown in FIG. 6, the embodiment further has shear protrusions 141 on the lower surface of the upper stator 14, and the shear protrusions 141 form shear flow channels therebetween. The shear protrusions 141 are away from the center of the upper stator 14 compared with the shear teeth 12 of the upper stator 14, so that the shear protrusions 141 are located on the outside of the upper stator 14. In this way, the slurry mixed by the shear teeth 12 will pass through the shear flow channels again before being discharged from the discharge port 133, thereby further improving the mixing effect.

[0061] As shown in FIG. 1, in the embodiment, the casing 10 further comprises a lower stator 17, which is arranged in the housing part 13 and located on the side of the middle stator 15 away from the upper stator 14, and a dispersion cavity 16 is formed between the lower stator 17 and the middle stator 15. The main function of the dispersion cavity 16 is to shear and disperse the slurry before the liquid is introduced into the mixing cavity 11 for mixing, thereby facilitating the mixing effect between the liquid and the powder in the subsequent mixing process. In the embodiment, a lower flow channel is formed in the inner ring of the lower stator 17 and communicates with the dispersion cavity 16. The lower flow channel can communicate with the liquid inlet 132 at the bottom of the housing part 13, thereby realizing the introduction of the liquid. The solid-liquid mixing device further comprises a rotor 30, which is rotatably arranged in the dispersion cavity 16 and has a circumferential edge between which and the circumferential side wall of the dispersion cavity 16 a flow passage 31 is formed. The rotor 30 is divided into an upper layer and a lower layer, and the upper layer and the lower layer are connected through the flow passage 31. The lower layer communicates with the lower flow channel, and the upper layer communicates with the middle flow channel. In this way, the liquid introduced into the lower layer of the rotor 30 flows radially outward from the center of the rotor 30, and with the continuous introduction, the liquid flows to the upper layer through the flow passage 31, flows into the center of the rotor 30, and then flows into the center of the second side of the impeller 20 through the middle flow channel, flows radially to the outer circumferential side of the impeller 20, and finally mixes with the powder at the flow guide hole 24 to form further slurry, which is then discharged from the discharge port 133 on the side of the mixing cavity 11, thereby completing a mixing process.

[0062] The dispersion cavity 16 of the embodiment is not a simple cavity. For ease of description, the rotor 30 of the embodiment has a first surface facing the middle stator 15 and a second surface facing the lower stator 17. According to the arrangement of the embodiment, the upper surface of the rotor 30 is the first surface, and the lower surface is the second surface. As shown in FIGS. 4 to 8, one of the surface of the middle stator 15 facing the rotor 30 and the first surface has a first annular protrusion 32, and the first annular protrusion 32 has a first shear flow channel 321 penetrating in the radial direction. The other of the surface of the middle stator 15 facing the rotor 30 and the first surface has a first shear protrusion 151. One of the surface of the lower stator 17 facing the rotor 30 and the second surface has a second annular protrusion 33, and the second annular protrusion 33 has a second shear flow channel 331 penetrating in the radial direction. The other of the surface of the lower stator 17 facing the rotor 30 and the second surface has a second shear protrusion 171. When the rotor 30 rotates, the first shear protrusion 151 can switch between a position shielding the first shear flow channel 321 and a position avoiding the first shear flow channel 321, and the second shear protrusion 171 can switch between a position shielding the second shear flow channel 331 and a position avoiding the second shear flow channel 331.

[0063] Specifically, as shown in FIG. 4 and FIG. 5, the first shear protrusion 151 is arranged on the lower surface of the middle stator 15; as shown in FIG. 8, the first annular protrusion 32 and the second annular protrusion 33 are respectively arranged on the upper surface and the lower surface of the rotor 30; as shown in FIG. 7, the second shear protrusion 171 is arranged on the upper surface of the lower stator 17. Wherein, the first annular protrusion 32 and the second annular protrusion 33 respectively have the first shear flow channel 321 and the second shear flow channel 331 which radially penetrate the inner and outer sides, and the first shear protrusion 151 and the first annular protrusion 32 radially adhere to the inner and outer sides, and the second shear protrusion 171 and the second annular protrusion 33 radially adhere to the inner and outer sides, so that when the rotor 30 rotates, the first shear protrusion 151 can switch between the positions of shielding and avoiding the first shear flow channel 321, and the second shear protrusion 171 can switch between the positions of shielding and avoiding the second shear flow channel 331, so as to realize the shear dispersion of the mortar by the cooperation between the first shear protrusion 151 and the first shear flow channel 321, and the second shear protrusion 171 and the second shear flow channel 331. As shown by the arrow in FIG. 1, when the mortar flows from the lower layer to the upper layer of the rotor 30, the rotor 30 needs to pass through each second shear flow channel 331 in the lower layer, so as to realize the shear of the lower layer flow by the cooperation between the second shear protrusion 171 and the second shear flow channel 331, and when flowing to the upper layer, it needs to pass through the first shear flow channel 321, so as to realize the shear of the upper layer flow by the cooperation between the first shear protrusion 151 and the first shear flow channel 321, which is beneficial to improve the shear dispersion times and improve the shear effect. Of course, the arrangement positions of each structure in the above-mentioned two sets of cooperation structures between the first shear protrusion 151 and the first shear flow channel 321, and between the second shear protrusion 171 and the second shear flow channel 331 can be interchanged, for example, the first annular protrusion 32 is arranged on the lower surface of the middle stator 15, and the first shear protrusion 151 is arranged on the upper surface of the rotor 30.

[0064] In the embodiment, the first annular protrusions 32 are multiple and are sequentially sleeved along the radial direction of the rotor 30, and the first shear protrusions 151 are multiple, and at least part of the first shear protrusions 151 are arranged at intervals along the circumferential direction of the rotor 30 to form a first shear protrusion ring, and the first shear protrusion ring is arranged between radially adjacent two first annular protrusions 32. Similarly, the second annular protrusions 33 are multiple and are sequentially sleeved along the radial direction of the rotor 30, and the second shear protrusions 171 are multiple, and at least part of the second shear protrusions 171 are arranged at intervals along the circumferential direction of the rotor 30 to form a second shear protrusion ring, and the second shear protrusion ring is arranged between radially adjacent two second annular protrusions 33. Taking the first annular protrusion 32 and the first shear protrusion 151 as an example, the first annular protrusion 32 can be provided with multiple first annular protrusions with different diameters, which are sequentially sleeved along the radial direction of the rotor 30, and each first annular protrusion 32 is circumferentially and equally spaced to be provided with multiple first shear flow channels 321, and correspondingly, the first shear protrusions 151 are also multiple, and part of the first shear protrusions 151 are circumferentially and equally spaced to form a first shear protrusion ring, and the first shear protrusion ring is also multiple and is sequentially sleeved along the radial direction of the rotor 30 in the form of the first annular protrusion 32, and the first shear protrusion ring is inserted into the gap between radially adjacent two first annular protrusions 32. In this way, according to the number of the first shear protrusion ring and the first annular protrusion 32, the mortar can be sheared several times, thereby improving the shearing times and further improving the shearing effect. The specific number of layers of the first shear protrusion ring and the first annular protrusion 32 can be set as needed and matched with the number of shearing required. In addition to arranging the first shear protrusion ring between the radially adjacent two first annular protrusions 32, one more first shear protrusion ring can be arranged outside or inside the outermost or innermost first annular protrusion 32, so that the first shear protrusion ring and the first annular protrusion 32 are arranged one by one in a radially alternating arrangement.

[0065] It should be noted that the first annular protrusion 32 and the first shear protrusion ring can form the same structure, that is, the circumferential side surfaces of the first shear protrusions 151 of the first shear protrusion ring are connected to each other, so that the first shear protrusion ring also has a structure similar to the first annular protrusion 32, that is, the shear flow channels are arranged on the annular protrusion. The second shear protrusion ring can also adopt the above form. The first annular protrusion 32, the first shear protrusion ring, the second annular protrusion 33 and the second shear protrusion ring of the embodiment have basically the same structure. Of course, the circumferential side surfaces of the first shear protrusions 151 of the first shear protrusion ring can also not be connected, and gaps are formed between the circumferential side surfaces, and when the first shear protrusions 151 block the first shear flow channels 321, the first annular protrusions 32 also block the gaps between the first shear protrusions 151.

[0066] Optionally, the through direction of the first shear flow channel 321 and the second shear flow channel 331 can be completely along the radial direction of the rotor 30, or can be substantially along the radial direction of the rotor 30, that is, the through direction of the first shear flow channel 321 and the second shear flow channel 331 can be deflected to form a certain angle with the radial direction of the rotor 30, as shown in FIGS. 9 and 10, so as to improve the shearing effect, and at this time, the directions of the deflection angles of the first shear flow channel 321 and the second shear flow channel 331 relative to the radial direction can be the same or opposite.

[0067] As shown in FIG. 1, the shell part 13 of the present embodiment has three openings connected to the outside, namely a solid feed port 131, a liquid feed port 132 and a discharge port 133. The solid feed port 131 is located at the side of the mixing cavity 11 away from the dispersion cavity 16 and at the center of the impeller 20, and is arranged at the center position above the impeller 20, so as to add powder to the center of the flow channel 21 on the first side of the impeller 20. At the same time, a stirring structure can be arranged at the solid feed port 131 to stir the powder, thereby facilitating the discharging. The liquid feed port 132 is located at the side of the dispersion cavity 16 away from the mixing cavity 11, and is arranged at the bottom side of the shell part 13 and communicated with the lower flow channel through a passage, so as to introduce liquid into the dispersion cavity 16 and the mixing cavity 11. The discharge port 133 is located at the circumferential side of the mixing cavity 11, so that the mixed slurry is directly discharged from the discharge port 133.

[0068] As shown in FIG. 11, the present embodiment further provides a solid-liquid mixing system, which comprises the above-mentioned solid-liquid mixing device and a circulating tank 40. The circulating tank 40 is communicated with the solid-liquid mixing device through a circulating pipeline 50. The slurry mixed by the solid-liquid mixing device enters into the circulating tank 40 through the circulating pipeline 50, and then enters into the solid-liquid mixing device again through the circulating pipeline 50. The solid-liquid mixing device of the present embodiment mainly plays a role of kneading powder and liquid and subsequent fine dispersion, and the circulating tank 40 plays a role of circulation. The circulating pipeline 50 essentially comprises two parts, namely a first pipeline between the discharge port 133 of the solid-liquid mixing device and the inlet of the circulating tank 40, and a second pipeline between the liquid feed port 132 of the solid-liquid mixing device and the outlet of the circulating tank 40, so as to realize the circulation of the slurry between the solid-liquid mixing device and the circulating tank 40.

[0069] In use, the solvent liquid is added to the circulating tank 40, and then the circulation of the sequence of the circulating tank 40-solid-liquid mixing device-circulating tank 40 is started. During the circulation, the powder can be added to the solid feeding port 131 through the hopper, and the powder is kneaded with the solvent liquid in the solid-liquid mixing device to form a slurry, and then the slurry is circulated to the circulating tank 40 and recirculated to the solid-liquid mixing device, and the powder is added to the solid-liquid mixing device again to increase the solid content in the slurry, and finally the target expected solid content is reached, and the powder discharging action stops. Complete the single cycle for the purpose of dispersion and uniformity, and finally obtain qualified slurry. This way can make the slurry knead better in unit time, reduce the time and power consumption required in the subsequent dispersion step, on the other hand, the initial kneading effect directly affects the agglomeration and screening rate of the finished slurry.

[0070] Example two

[0071] The difference from example one is that the structure of the solid-liquid mixing system is different.

[0072] As shown in FIG. 12, in this embodiment, the circulating tank 40 is multiple, each circulating tank 40 is communicated with the solid-liquid mixing device through the circulating pipeline 50, and the circulating tanks 40 are connected in parallel. The circulating pipeline 50 can be provided with multiple circulating pipelines according to the needs, and different solid-liquid mixing devices are respectively communicated with the same solid-liquid mixing device through the corresponding circulating pipeline 50, or the circulating pipeline 50 can be provided with a multi-branch structure such as a three-way, four-way, etc., so that multiple circulating tanks 40 can be respectively connected with different interfaces of the circulating pipeline 50, thereby realizing the communication with the solid-liquid mixing device. Valves and other components can be provided on the circulating pipeline 50 as needed, so as to control the slurry to be delivered to the device. The solid-liquid mixing device of the present embodiment mainly plays the role of powder liquid kneading and subsequent fine dispersion.

[0073] Take the example of two circulating tanks 40, for the sake of description, called the first circulating tank 40 and the second circulating tank 40. In use, the early process is basically the same as that of Example One, solvent liquid is added to the first circulating tank 40, and then the circulating process of the first circulating tank 40-solid-liquid mixing device-the first circulating tank 40 is started, during which the powder is added to the solid feeding port 131 through the hopper, so that the powder and the solvent liquid are kneaded into slurry in the solid-liquid mixing device, and then the slurry is circulated to the circulating tank 40 and recirculated to the solid-liquid mixing device, while being dispersed, the powder is added to the solid-liquid mixing device again, so that the solid content in the slurry is continuously increased, and finally reaches the target expected solid content, and the powder discharging action stops. Then the double circulating process is started: the slurry is circulated by the first circulating tank 40-solid-liquid mixing device-the second circulating tank 40-solid-liquid mixing device-the first circulating tank 40. The purpose of this is to make each part of the slurry in the first circulating tank 40 pass through the solid-liquid mixing device once for dispersion and then go to the second circulating tank 40, and then each part of the slurry in the second circulating tank 40 passes through the solid-liquid mixing device once for treatment and then goes to the first circulating tank 40, so that each part of the slurry can pass through the same number of shearing times and shearing force, ensuring the uniformity of the slurry.

[0074] Example Three

[0075] The difference from Example One is that the structure of the solid-liquid mixing system is different.

[0076] As shown in FIG. 13, in this embodiment, the solid-liquid mixing system further includes a kneading device 70, which is in communication with the circulating tank 40 and can deliver the preliminarily kneaded slurry into the circulating tank 40. The cooperation mode between the circulating tank 40 and the solid-liquid mixing device is basically the same as that of Example One. The main role of the solid-liquid mixing device of this embodiment is to further refine, disperse and de-agglomerate the already formed slurry.

[0077] Specifically, the main role of the kneading device 70 of this embodiment is to forcibly compress the solvent and the powder into slurry, and then deliver the slurry to the circulating tank 40-solid-liquid mixing device-circulating tank 40 process for single circulation, so that the preliminarily kneaded slurry is dispersed and treated by the solid-liquid mixing device into fine and uniform qualified product slurry.

[0078] Example Four

[0079] The difference from Example One is that the structure of the solid-liquid mixing system is different.

[0080] As shown in FIG. 14, in the present embodiment, the solid-liquid mixing device, the circulation pipeline 50 and the circulation tank 40 are all multiple, the solid-liquid mixing system further comprises multiple circulation processing systems, each of which comprises a solid-liquid mixing device, a circulation pipeline 50 and a circulation tank 40, and the solid-liquid mixing system further comprises a connecting pipeline 60 which simultaneously communicates with multiple circulation processing systems so as to communicate between the circulation processing systems through the connecting pipeline 60. The two ends of the connecting pipeline 60 of the present embodiment are respectively connected and communicated with the first pipelines of the circulation pipelines 50 of two circulation processing systems, so that the slurry in one circulation processing system can be transported into the first pipeline of another circulation processing system through the first pipeline of the solid-liquid mixing device thereof, the connecting pipeline 60, so as to realize circulation in the other circulation processing system. Of course, the connecting pipeline 60 can also be connected with other devices and structures, as long as it can communicate between two circulation processing systems and realize the transportation of the slurry from one circulation processing system to another circulation processing system.

[0081] The present embodiment takes two circulation processing systems as an example, each of which comprises a solid-liquid mixing device, a circulation pipeline 50 and a circulation tank 40, and the cooperation mode between the solid-liquid mixing device, the circulation pipeline 50 and the circulation tank 40 can refer to the setting mode in Embodiment One. In order to explain later, the two circulation processing systems are respectively called the first circulation processing system and the second circulation processing system, and the solid-liquid mixing device, the circulation pipeline 50 and the circulation tank 40 thereof are also respectively named the first and the second. The solid-liquid mixing device of the present embodiment simultaneously has the functions of primary kneading and primary dispersion of powder and liquid and re-fine dispersion of slurry.

[0082] In use, the first circulation processing system and the second circulation processing system work at a time, the upper powder in the first circulation processing system is kneaded with the solvent in the first circulation tank 40 through multiple single circulation steps of the first circulation tank 40-the first solid-liquid mixing device-the first circulation tank 40 to form slurry and perform primary dispersion. Then, after the powder is completed, the slurry is transferred to the second circulation tank 40 of the second circulation processing system through the connecting pipeline 60 driven by the first solid-liquid mixing device, and then multiple single circulation is performed through the second circulation tank 40-the second solid-liquid mixing device-the second circulation tank 40 to start the fine dispersion process.

[0083] In the process of working of the second circulation processing system, the first circulation processing system has been idle because the first circulation processing system has completed the initial kneading and preliminary dispersion, so the first circulation tank 40 and the first solid-liquid mixing device can be charged and restarted the single circulation process while the second circulation processing system is working. When the working steps of the first circulation processing system are completed again, the working steps of the second circulation processing system have completed the fine dispersion of the slurry, and the downstream can be discharged, so the second circulation processing system can again accept the slurry delivered by the first circulation processing system to perform the fine dispersion process again. In this way, the first circulation processing system and the second circulation processing system can run simultaneously without stopping, which can greatly shorten the time required for the overall processing and improve the efficiency by 80-95%.

[0084] It should be noted that the plurality in the above embodiments means at least two.

[0085] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0086] 1. The problem of poor mixing of the slurry in the powder-liquid mixing device in the prior art is solved.

[0087] 2. The contact infiltration time is improved during powder-liquid mixing, the mixing intensity and kneading process are increased, the quality of the final slurry product is improved, and the efficiency is also positively improved.

[0088] 3. Without increasing the number of cycles, the mixing of the slurry is further refined, resources and costs are saved, higher quality slurry can be produced within a certain time, and the quality of the finished slurry is greatly improved.

[0089] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the scope of protection of the present application.

[0090] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A solid-liquid mixing apparatus, characterized by comprising: The utility model relates to a mixing device, comprising: a casing (10) having a mixing cavity (11) for mixing materials; a rotor (20) rotatably arranged in the mixing cavity (11), one of the rotor (20) and the casing (10) having a plurality of circumferentially arranged flow channels (21) with vanes (22) arranged therebetween, the vanes (22) having shear grooves (23) circumferentially arranged, the other of the rotor (20) and the casing (10) having shear teeth (12) passing through each of the flow channels (21) and each of the shear grooves (23) when the rotor (20) rotates, the rotor (20) further having a guide hole (24) penetratingly arranged and communicating with the flow channels (21).

2. The solid-liquid mixing apparatus according to claim 1, wherein The rotor (20) has a first side and a second side in the axial direction, and the first side and the second side are both provided with the flow channels (21) and the shear teeth (12), the flow channels (21) of the first side and the flow channels (21) of the second side are respectively used for passing different materials to be mixed.

3. The solid-liquid mixing apparatus according to claim 2, wherein The guide hole (24) penetrates the first side and the second side and communicates with the flow channels (21) of the first side and the flow channels (21) of the second side.

4. The solid-liquid mixing apparatus according to claim 2, wherein The first side includes an arc segment (25) and a straight segment (26), the arc segment (25) is located in the inner ring of the straight segment (26), and the arc segment (25) extends away from the second side in the direction close to the central axis of the rotor (20), the vanes (22) include a first section located in the arc segment (25) and a second section located in the straight segment (26), and the shear grooves (23) are located in the second section.

5. The solid-liquid mixing apparatus according to claim 4, wherein The shear grooves (23) of the first side and the shear grooves (23) of the second side are arranged in alignment in the axial direction of the rotor (20).

6. The solid-liquid mixing apparatus according to claim 4, wherein The guide hole (24) is located in the straight segment (26).

7. The solid-liquid mixing apparatus according to claim 1, wherein The surface of the rotor (20) has the flow channels (21) and the vanes (22), the vanes (22) extend along the surface of the rotor (20), and the vanes (22) form an angle with the axis of the rotor (20), the inner wall of the mixing cavity (11) has the shear teeth (12), the shear teeth (12) are a plurality of, and the shear teeth (12) are arranged on the inner walls of the opposite ends of the mixing cavity (11).

8. The solid-liquid mixing apparatus according to claim 7, wherein A plurality of shear teeth (12) are arranged on the inner walls of the opposite ends of the mixing cavity (11) respectively, and the shear teeth (12) on the inner walls are arranged in the circumferential direction of the rotor (20) at intervals.

9. The solid-liquid mixing apparatus according to claim 7, wherein At least part of the vanes (22) are in a spiral structure in the circumferential direction of the rotor (20).

10. The solid-liquid mixing apparatus according to claim 1, wherein The machine shell (10) comprises a shell part (13) having a receiving cavity, an upper stator (14) and a middle stator (15) located in the receiving cavity, the middle stator (15) separates the receiving cavity into the mixing cavity (11) and the dispersion cavity (16) arranged axially, the upper stator (14) and the middle stator (15) form the mixing cavity (11), the inner ring of the middle stator (15) has a middle flow channel connecting the mixing cavity (11) and the dispersion cavity (16), the surface of the upper stator (14) and the middle stator (15) towards the mixing cavity (11) has the shear groove (23) or the shear tooth (12).

11. The solid-liquid mixing device according to claim 10, wherein The machine shell (10) further comprises a lower stator (17) arranged in the shell part (13), the lower stator (17) is located on the side of the middle stator (15) away from the upper stator (14), and the dispersion cavity (16) is formed between the lower stator (17) and the middle stator (15), the inner ring of the lower stator (17) has a lower flow channel connecting the dispersion cavity (16); The solid-liquid mixing device further comprises a rotor (30) rotatably arranged in the dispersion cavity (16), and a flow-through passage (31) is formed between the circumferential side wall of the dispersion cavity (16) and the circumferential edge of the rotor (30), the rotor (30) has a first surface towards the middle stator (15) and a second surface towards the lower stator (17), one of the surface of the middle stator (15) towards the rotor (30) and the first surface has a first annular protrusion (32) having a first shear flow channel (321) radially penetrating through, the other of the surface of the middle stator (15) towards the rotor (30) and the first surface has a first shear protrusion (151), one of the surface of the lower stator (17) towards the rotor (30) and the second surface has a second annular protrusion (33) having a second shear flow channel (331) radially penetrating through, the other of the surface of the lower stator (17) towards the rotor (30) and the second surface has a second shear protrusion (171), when the rotor (30) rotates, the first shear protrusion (151) can switch between positions of shielding and avoiding the first shear flow channel (321), and the second shear protrusion (171) can switch between positions of shielding and avoiding the second shear flow channel (331).

12. The solid-liquid mixing device according to claim 11, wherein The first annular protrusions (32) are a plurality of annular protrusions arranged in sequence along the radial direction of the rotor (30), and the first shear protrusions (151) are a plurality of shear protrusions, at least part of the first shear protrusions (151) are arranged in sequence along the circumferential direction of the rotor (30) to form a first shear protrusion ring, and the first shear protrusion ring is arranged between radially adjacent two first annular protrusions (32); and / or The second annular protrusions (33) are a plurality of annular protrusions arranged in sequence along the radial direction of the rotor (30), and the second shear protrusions (171) are a plurality of shear protrusions, at least part of the second shear protrusions (171) are arranged in sequence along the circumferential direction of the rotor (30) to form a second shear protrusion ring, and the second shear protrusion ring is arranged between radially adjacent two second annular protrusions (33).

13. The solid-liquid mixing apparatus according to claim 11, wherein At least one of the first shear flow channel (321) and the first shear flow channel (321) forms an included angle with the radial direction of the rotor (30).

14. The solid-liquid mixing apparatus according to claim 10, wherein The shell part (13) has a solid feed inlet (131), a liquid feed inlet (132) and a discharge outlet (133), the solid feed inlet (131) is located at the center of the impeller (20) on the side of the mixing cavity (11) away from the dispersion cavity (16), the liquid feed inlet (132) is located on the side of the dispersion cavity (16) away from the mixing cavity (11), and the discharge outlet (133) is located at the circumferential side of the mixing cavity (11).

15. A solid-liquid mixing system, characterized by, The solid-liquid mixing system comprises: The solid-liquid mixing device according to any one of claims 1 to 14; A circulating tank (40) in communication with the solid-liquid mixing device through a circulating pipeline (50), and the slurry mixed by the solid-liquid mixing device enters the circulating tank (40) through the circulating pipeline (50) and then enters the solid-liquid mixing device again through the circulating pipeline (50).

16. The solid-liquid mixing system of claim 15, wherein, The solid-liquid mixing system comprises:

17. The solid-liquid mixing system of claim 15, wherein, The solid-liquid mixing system further comprises a kneading device (70) in communication with the circulating tank (40) and capable of delivering the preliminarily kneaded slurry into the circulating tank (40).

18. The solid-liquid mixing system of claim 15, wherein, The solid-liquid mixing system further comprises a plurality of circulating processing systems, each of which comprises the solid-liquid mixing device, the circulating pipeline (50) and the circulating tank (40), and the solid-liquid mixing system further comprises a connecting pipeline (60) in communication with the plurality of circulating processing systems at the same time so that the circulating processing systems are in communication with each other through the connecting pipeline (60).

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