Solid-liquid mixing equipment

Abstract

The utility model discloses solid-liquid mixing equipment. The solid-liquid mixing equipment comprises a shell, a driving device and a rotating component, a powder inlet cavity, a liquid inlet cavity and a mixing cavity are formed in the shell, the powder inlet cavity is annularly arranged on the periphery of the liquid inlet cavity in a surrounding mode, and the mixing cavity is arranged below the powder inlet cavity and communicated with the powder inlet cavity and the liquid inlet cavity at the same time; the driving device is respectively connected with the shell and the rotating assembly and is used for driving the rotating assembly to rotate, and the rotation of the rotating assembly is used for simultaneously stirring in the powder inlet cavity, the liquid inlet cavity and the mixing cavity; according to the scheme, the feeding mode of middle powder feeding of existing solid-liquid mixing equipment is changed, a liquid feeding device is arranged in the middle, and a powder feeding device is arranged on the periphery of the liquid feeding device, so that the powder feeding device is arranged on an inevitable path for liquid flowing, liquid can be mixed with powder, the powder is brought to a mixing cavity below, and the powder feeding device is arranged on the periphery of the liquid feeding device. Therefore, the dispersing performance of solid-liquid mixing can be improved, the solid-liquid mixing time is shortened, and the risk of powder blocking is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-liquid mixing, in particular to a solid-liquid mixing device. Background Art

[0002] In the preparation of lithium-ion battery slurry, slurry is a high-viscosity and high-solid content mixture made by mixing powder and liquid. Generally speaking, the whole mixing process can be divided into three stages: breaking up, infiltration and shear dispersion. In the breaking up stage, the powder changes from a large mass to a dispersed state dispersed in the air or other gases through the stirring of the breaking mechanism; in the infiltration stage, the dispersed powder contacts the liquid and is initially mixed into slurry; in the shear dispersion stage, the slurry is sheared and dispersed by a rotating knife disc to make the slurry more evenly dispersed.

[0003] Most of the solid-liquid mixing equipment in the prior art has a powder feeding chamber in the middle for feeding powder, and a liquid feeding chamber is arranged on the periphery of the powder feeding chamber. That is, the feeding method of the solid-liquid mixing equipment in the prior art is to feed powder in the middle and liquid on the periphery. This will cause the outermost part of the liquid to directly enter the shear dispersion area below without merging with the powder, which limits the improvement of the dispersion performance of the solid-liquid mixing and is also prone to cause the problem of powder sticking. Utility Model Content

[0004] The utility model aims to provide a solid-liquid mixing device, which mainly solves the technical problem of how to improve the dispersion performance of solid-liquid mixing and reduce the powder sticking phenomenon.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A solid-liquid mixing device comprises a housing, a driving device and a rotating assembly;

[0007] The shell is provided with a powder inlet chamber, a liquid inlet chamber and a mixing chamber, wherein the powder inlet chamber is annularly arranged around the outer periphery of the liquid inlet chamber, and the mixing chamber is arranged below the powder inlet chamber and is communicated with the powder inlet chamber and the liquid inlet chamber at the same time;

[0008] The driving device is respectively connected to the housing and the rotating assembly and is used to drive the rotating assembly to rotate. The rotation of the rotating assembly is used to stir the powder inlet chamber, the liquid inlet chamber and the mixing chamber at the same time.

[0009] In one of the technical solutions, the rotating assembly includes a rotating shaft and a powder scattering head, a liquid dispersing head and a rotating blade respectively fixedly connected to the rotating shaft;

[0010] The rotating shaft is rotatably connected to the shell, the driving device is connected to the rotating shaft and is used to drive the rotating shaft to rotate, the powder breaking head is accommodated in the powder inlet chamber, the liquid dispersing head is accommodated in the liquid inlet chamber, the rotating blade disc is accommodated in the mixing chamber, a baffle fixedly connected to the shell is provided in the mixing chamber, and the rotating rotating blade disc is used to shear and disperse the mixed liquid together with the baffle.

[0011] In one of the technical solutions, a plurality of breaking pieces are arranged on the outer wall of the powder breaking head, a powder inlet is arranged on the wall of the powder inlet chamber, the upper end of the powder breaking head is higher than the powder inlet, and the part of the powder breaking head higher than the powder inlet is also provided with the breaking pieces.

[0012] In one of the technical solutions, the baffle includes a main body and two circles of ribs protruding from the main body, an annular flow channel groove is arranged between the two circles of ribs, the rotating cutter disc includes a connected base and an annular boss, the boss is embedded in the flow channel groove, a plurality of through slots are arranged on the two circles of ribs, and a plurality of through shear holes are arranged on the boss.

[0013] In one of the technical solutions, when the rotating cutter disc rotates to any position relative to the baffle, the penetration direction of any of the notches and the penetration direction of any of the shear holes are not on the same straight line.

[0014] In one of the technical solutions, the bottom of the base is provided with a plurality of circumferentially arranged radial protrusions.

[0015] In one of the technical solutions, the rotating component also includes a pumping impeller, which is fixedly connected to the rotating blade disc and the boss is arranged around the outer circumference of the pumping impeller. The pumping impeller is used to drive the mixed liquid to be discharged to the outside after being sheared and dispersed by the rotating blade disc and the baffle.

[0016] In one of the technical solutions, the rotating assembly also includes a mixing impeller, which is located between the powder breaking head and the pumping impeller. The blades of the mixing impeller are provided with a plurality of through holes, which are used for allowing the mixed liquid to pass through so as to preliminarily shear and disperse the mixed liquid.

[0017] In one of the technical solutions, a plurality of inclined breaking pieces are arranged on the outer wall of the powder breaking head, the upper ends of the blades of the mixing impeller are connected with the lower ends of the breaking pieces at the bottom of the powder breaking head, and the lower ends of the blades of the mixing impeller are connected with the upper ends of the blades of the pumping impeller.

[0018] In one of the technical solutions, the solid-liquid mixing equipment also includes a speed-adjustable screw powder feeding mechanism, which is connected to the shell and is used to drive the powder from the powder inlet into the powder inlet chamber, and a liquid outlet that passes through to the outside is provided on the wall of the mixing chamber.

[0019] Compared with the prior art, the solid-liquid mixing device provided by the utility model has at least the following beneficial effects:

[0020] During operation, the liquid enters the liquid inlet chamber, and the powder enters the powder inlet chamber. When the liquid flows downward to the mixing chamber, it mixes with the powder in the powder inlet chamber and brings the powder to the mixing chamber below. At the same time, the rotation of the rotating component makes the liquid in the liquid inlet chamber dispersed to a certain extent in advance, and the powder in the powder inlet chamber is also dispersed to a certain extent in advance, and the mixed liquid in the mixing chamber can be sheared and dispersed to obtain a uniformly dispersed mixed slurry.

[0021] This solution changes the existing feeding method of feeding powder in the middle of solid-liquid mixing equipment. This solution sets the liquid feed in the middle and the powder feed on the periphery of the liquid feed, so that the powder feed is set on the necessary path for the liquid to flow, so that the liquid can be mixed with the powder and the powder is brought to the mixing chamber below, thereby improving the dispersion performance of the solid-liquid mixing, shortening the solid-liquid mixing time, and reducing the risk of powder jamming; moreover, by designing the rotating component to be used for shearing and dispersing the mixed liquid and also for pre-dispersing the powder in the powder feed chamber and the liquid in the liquid feed chamber, the powder can be dissolved in the liquid more quickly, and the liquid can be more uniform before mixing with the powder, thereby further improving the dispersion performance of the solid-liquid mixing, further shortening the solid-liquid mixing time, and further reducing the risk of powder jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of the structure of a solid-liquid mixing device provided in an embodiment of the present application;

[0024] Figure 2 An internal structure diagram of a solid-liquid mixing device provided in an embodiment of the present application;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 A schematic diagram of the structure of the baffle and the rotating assembly provided in the embodiment of the present application when they cooperate;

[0027] Figure 5 A schematic diagram of the structure of the rotating cutter disc and the pumping impeller provided in the embodiment of the present application when they cooperate;

[0028] Figure 6 A schematic diagram of the structure of the baffle provided in an embodiment of the present application.

[0029] Among them, the reference numerals in the figure are:

[0030] 1. Shell; 11. Powder inlet chamber; 111. Powder inlet port; 12. Liquid inlet chamber; 121. Liquid inlet port; 13. Mixing chamber; 131. Liquid outlet port; 2. Driving device; 3. Rotating assembly; 31. Rotating shaft; 32. Powder scattering head; 321. scattering sheet; 33. Liquid dispersion head; 34. Rotating cutter disc; 341. Base; 342. Boss; 3421. Shear hole; 343. Radial protrusion; 35. Pumping impeller; 36. Mixing impeller; 361. Through hole; 4. Screw powder supply mechanism; 5. Baffle; 51. Main body; 52. Sidewall; 521. Notch; 53. Flow channel. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Please also read Figures 1 to 6 This embodiment provides a solid-liquid mixing device, including a shell 1, a driving device 2, a rotating component 3 and an adjustable speed screw powder feeding mechanism 4.

[0037] Among them, a powder inlet chamber 11, a liquid inlet chamber 12 and a mixing chamber 13 are arranged in the shell 1. The powder inlet chamber 11 is arranged in a ring shape around the outer periphery of the liquid inlet chamber 12, and the mixing chamber 13 is arranged below the powder inlet chamber 11 and is connected with the powder inlet chamber 11 and the liquid inlet chamber 12. Specifically, the screw-type powder supply mechanism 4 is used to automatically supply powder into the powder inlet chamber 11. The screw-type powder supply mechanism 4 is a prior art, which has a speed regulating function. The powder supply speed can be adjusted according to the actual solid content of production and the melting speed of different liquids. The wall of the liquid inlet chamber 12 is provided with a liquid inlet 121, and the wall of the mixing chamber 13 is provided with a liquid outlet 131 that penetrates the outside.

[0038] Among them, the rotating component 3 is rotatably connected to the shell 1 through a bearing, and the driving device 2 is respectively connected to the shell 1 and the rotating component 3. The driving device 2 is used to drive the rotating component 3 to rotate. However, when the rotating component 3 rotates, the rotating component 3 stirs in the powder inlet chamber 11, the liquid inlet chamber 12 and the mixing chamber 13 at the same time.

[0039] During operation, the liquid enters the liquid inlet chamber 12, and the screw-type powder feeding mechanism 4 drives the powder to enter the powder inlet chamber 11. When the liquid flows downward to the mixing chamber 13, it mixes with the powder in the powder inlet chamber 11 and brings the powder to the mixing chamber 13 below. At the same time, the rotation of the rotating component 3 enables the liquid to be dispersed in advance in the liquid inlet chamber 12, and the powder to be dispersed in advance in the powder inlet chamber 11. It can also shear and disperse the mixed liquid of the powder and liquid in the mixing chamber 13 to obtain a uniformly dispersed mixed slurry.

[0040] In summary, the present solution changes the feeding method of feeding powder in the middle of the existing solid-liquid mixing equipment. The present solution sets the liquid feed in the middle and the powder feed on the periphery of the liquid feed, so that the powder feed is set on the necessary path for the liquid to flow, so that the liquid can be mixed with the powder and the powder is brought to the mixing chamber 13 below, thereby improving the dispersion performance of the solid-liquid mixing, shortening the solid-liquid mixing time, and reducing the risk of powder jamming; moreover, by designing the rotating component 3 to be used for shearing and dispersing the mixed liquid while also being used to pre-disperse the powder in the powder feed chamber 11 and the liquid in the liquid feed chamber 12, the powder can be dissolved in the liquid faster and the liquid can be more uniform before being mixed with the powder, thereby further improving the dispersion performance of the solid-liquid mixing, further shortening the solid-liquid mixing time, and further reducing the risk of powder jamming.

[0041] In this embodiment, the rotating assembly 3 specifically includes a rotating shaft 31, a powder dispersing head 32, a liquid dispersing head 33 and a rotating blade disc 34, wherein the rotating shaft 31 and the housing 1 are rotatably connected via a bearing, the axis of the rotating shaft 31 points to the vertical direction, the above-mentioned driving device 2 is connected to the rotating shaft 31 and is used to drive the rotating shaft 31 to rotate, and the powder dispersing head 32, the liquid dispersing head 33 and the rotating blade disc 34 are all sleeved and fixed on the rotating shaft 31 to rotate synchronously with the rotating shaft 31. Among them, the powder dispersing head 32 is accommodated in the powder inlet chamber 11 to disperse the powder in the powder inlet chamber 11, the liquid dispersing head 33 is accommodated in the liquid inlet chamber 12 to disperse the liquid in the liquid inlet chamber 12, and the rotating blade disc 34 is accommodated in the mixing chamber 13, and a baffle 5 fixedly connected to the housing 1 is provided in the mixing chamber 13, and the rotating blade disc 34 is used to shear and disperse the mixed liquid together with the baffle 5. Specifically, the baffle 5 includes a main body 51 and two circles of ribs 52 protruding from the main body 51, the two circles of ribs 52 are both annular, and the two circles of ribs 52 are arranged at intervals, so that an annular flow channel 53 is formed between the two circles of ribs 52, and a plurality of transversely penetrating notches 521 are provided on the two circles of ribs 52, and the rotating blade disc 34 includes a connected base 341 and an annular boss 342, the boss 342 is embedded in the flow channel 53, and a plurality of transversely penetrating shear holes 3421 are provided on the boss 342, when the rotating blade disc 34 rotates relative to the baffle 5, the rotating blade disc 34 and the baffle 5 can jointly shear the mixed liquid. In addition, when the rotating blade disc 34 rotates to any position relative to the baffle 5, the penetration direction of any slot 521 and the penetration direction of any shear hole 3421 are not on the same straight line, thereby preventing the mixed liquid from being discharged outward without being sheared together by the rotating blade disc 34 and the baffle 5, ensuring that the mixed liquid can only be discharged outward after being sheared together by the rotating blade disc 34 and the baffle 5, so as to further improve the dispersion effect of the mixed liquid.

[0042] See also Figure 3, a plurality of dispersing pieces 321 are arranged on the outer wall of the powder dispersing head 32, and the plurality of dispersing pieces 321 are gradually tilted downward along the rotation direction of the powder dispersing head 32 to drive the powder in the powder inlet chamber 11 to move downward, and a powder inlet 111 is arranged on the wall of the powder inlet chamber 11, and the upper end of the powder dispersing head 32 is higher than the powder inlet 111, and the portion of the powder dispersing head 32 higher than the powder inlet 111 is also provided with dispersing pieces 321, so that the powder located near the powder inlet 111 will not float upward, but will be suppressed by the dispersing pieces 321 located above and automatically move downward. In order to improve the performance of the powder dispersing head 32 in dispersing and pumping the powder downward, the bottom end of the powder dispersing head 32 can be made into a screw structure. In other embodiments, the dispersing pieces 321 may not be designed to be tilted, and may be designed as pin-type blades.

[0043] See also Figure 5 The bottom of the base 341 of the rotating cutter disc 34 is provided with a plurality of circumferentially arranged radial protrusions 343. When in operation, the radial protrusions 343 can discharge the mixed liquid deposited at the bottom to the outside, avoiding excessive deposition of the mixed liquid at the bottom, ensuring that the equipment can operate stably for a long time and extending the maintenance cycle of the equipment.

[0044] In this embodiment, the rotating component 3 also includes a pumping impeller 35, which is fixedly connected to the above-mentioned rotating blade disc 34 and the boss 342 on the rotating blade disc 34 is arranged around the outer periphery of the pumping impeller 35. The pumping impeller 35 is used to drive the mixed liquid to be discharged to the outside after being sheared and dispersed by the rotating blade disc 34 and the baffle 5, thereby improving the discharge capacity of the mixed liquid. At the same time, the pumping impeller 35 also has a self-priming performance to speed up the feeding speed of powder and liquid, thereby further improving the efficiency of solid-liquid mixing.

[0045] In this embodiment, the rotating assembly 3 further includes a mixing impeller 36, which is located between the powder scattering head 32 and the pumping impeller 35. The blades of the mixing impeller 36 are provided with a plurality of through holes 361, which are used for the mixed liquid to pass through so as to preliminarily shear and disperse the mixed liquid. When the mixing impeller 36 rotates, the slurry will pass through the plurality of through holes 361 on the mixing impeller 36, and the hole walls of the through holes 361 shear the slurry to improve the efficiency of the powder and the liquid being infiltrated into the mixed slurry. In the mixing process, the through holes 361 on the blades of the mixing impeller 36 are used to shear the slurry, so that the powder is evenly infiltrated and dispersed, thereby reducing the powder. The appearance of the agglomerate accelerates the mixing efficiency of the powder and the liquid, and the slurry will pass through the through hole 361 for many times, which greatly extends the mixing path of the powder and the liquid, making the slurry mixing more uniform. In addition, the early dispersion using the mixing impeller 36 is equivalent to sharing the pressure of the subsequent rotation of the rotating blade disc 34. The dispersion of the front mixing impeller 36 belongs to the shear in the rotation direction, so it requires low energy consumption. In other words, by setting the mixing impeller 36, the energy consumption of the subsequent dispersion of the rotating blade disc 34 and the energy consumption of the pumping impeller 35 are reduced. Therefore, while improving the dispersion effect of the high-solid content slurry, the power of the powder-liquid mixing equipment also becomes lower.

[0046] See also Figure 4 The upper ends of the blades of the mixing impeller 36 are connected to the lower ends of the powder breaking pieces 321 at the bottom of the powder breaking head 32, and the lower ends of the blades of the mixing impeller 36 are connected to the upper ends of the blades of the pumping impeller 35, thereby greatly reducing the liquid splashing phenomenon, improving the stability of solid-liquid mixing and ensuring better dispersion performance.

[0047] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A solid-liquid mixing device, characterized in that: It includes a housing, a driving device and a rotating assembly; The shell is provided with a powder inlet chamber, a liquid inlet chamber and a mixing chamber, wherein the powder inlet chamber is annularly arranged around the outer periphery of the liquid inlet chamber, and the mixing chamber is arranged below the powder inlet chamber and is communicated with the powder inlet chamber and the liquid inlet chamber at the same time; The driving device is respectively connected to the housing and the rotating assembly and is used to drive the rotating assembly to rotate. The rotation of the rotating assembly is used to stir the powder inlet chamber, the liquid inlet chamber and the mixing chamber at the same time.

2. The solid-liquid mixing device according to claim 1, characterized in that: The rotating assembly includes a rotating shaft and a powder scattering head, a liquid dispersing head and a rotating knife disc respectively fixedly connected to the rotating shaft; The rotating shaft is rotatably connected to the shell, the driving device is connected to the rotating shaft and is used to drive the rotating shaft to rotate, the powder breaking head is accommodated in the powder inlet chamber, the liquid dispersing head is accommodated in the liquid inlet chamber, the rotating blade disc is accommodated in the mixing chamber, a baffle fixedly connected to the shell is provided in the mixing chamber, and the rotating rotating blade disc is used to shear and disperse the mixed liquid together with the baffle.

3. The solid-liquid mixing device according to claim 2, characterized in that: A plurality of breaking pieces are arranged on the outer wall of the powder breaking head, a powder inlet is arranged on the wall of the powder inlet chamber, the upper end of the powder breaking head is higher than the powder inlet, and the part of the powder breaking head higher than the powder inlet is also provided with the breaking pieces.

4. The solid-liquid mixing device according to claim 2, characterized in that: The baffle includes a main body and two circles of ribs protruding from the main body, an annular flow channel groove is arranged between the two circles of ribs, the rotating cutter disc includes a connected base and an annular boss, the boss is embedded in the flow channel groove, a plurality of penetrating notches are arranged on the two circles of ribs, and a plurality of penetrating shear holes are arranged on the boss.

5. The solid-liquid mixing device according to claim 4, characterized in that: When the rotating cutter disc rotates to any position relative to the baffle, the penetration direction of any of the notches and the penetration direction of any of the shear holes are not on the same straight line.

6. The solid-liquid mixing device according to claim 4, characterized in that: The bottom of the base is provided with a plurality of circumferentially arranged radial protrusions.

7. The solid-liquid mixing device according to claim 4, characterized in that: The rotating assembly also includes a pumping impeller, which is fixedly connected to the rotating blade disc and the boss is arranged around the outer circumference of the pumping impeller. The pumping impeller is used to drive the mixed liquid to be discharged to the outside after being sheared and dispersed by the rotating blade disc and the baffle.

8. The solid-liquid mixing device according to claim 7, characterized in that: The rotating assembly also includes a mixing impeller, which is located between the powder scattering head and the pumping impeller. The blades of the mixing impeller are provided with a plurality of through holes, and the through holes are used for allowing the mixed liquid to pass through so as to preliminarily shear and disperse the mixed liquid.

9. The solid-liquid mixing device according to claim 8, characterized in that: A plurality of inclined breaking pieces are arranged on the outer wall of the powder breaking head, the upper ends of the blades of the mixing impeller are connected with the lower ends of the breaking pieces at the bottom of the powder breaking head, and the lower ends of the blades of the mixing impeller are connected with the upper ends of the blades of the pumping impeller.

10. The solid-liquid mixing device according to claim 3, characterized in that: The solid-liquid mixing equipment also includes a speed-adjustable screw powder feeding mechanism, which is connected to the shell and is used to drive the powder from the powder inlet into the powder inlet chamber. A liquid outlet that penetrates to the outside is provided on the cavity wall of the mixing chamber.

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