Solid-liquid mixing equipment suitable for high-viscosity materials and mixing method using the equipment

Abstract

The present invention discloses a solid-liquid mixing device suitable for high-viscosity materials and a mixing method using the device, which includes a shell with a powder feeding pipe, a spiral feeding module, a liquid distribution module, a mixing and dispersing module and a high-viscosity material discharge module; the spiral feeding module is located in the shell and is used to convey the powder to be mixed; the liquid distribution module is located on the circumference of the upper part of the shell and is used to inject the liquid to be mixed into the shell; the mixing and dispersing module is located in the shell and arranged at the lower end of the spiral feeding module, and is used to disperse and / or crush and mix the powder to be mixed and the liquid to be mixed; the high-viscosity material discharge module is located at the discharge port of the shell and is used to discharge the slurry dispersed and / or crushed and mixed by the mixing and dispersing module. The present invention can adapt to the solid-liquid mixing and dispersion of high-viscosity slurry.

Description

Technical Field

[0001] The invention belongs to the technical field of powder slurrying, solid-liquid mixing or rapid dispersion of nanometer powder materials, and specifically relates to a solid-liquid mixing device suitable for high-viscosity materials and a mixing method using the device. Background Art

[0002] With the development of powder technology and nanotechnology, more and more ultrafine powders will be dispersed in a small amount of liquid to form high-concentration and high-viscosity slurries. Since the liquid component content is very small in high-concentration slurries, it is very difficult to evenly mix the powder and liquid. In addition, although some slurries do not have a high solid content, their viscosity is very high due to their physical properties. High-viscosity slurries are very difficult to disperse and mix with equipment due to their high viscosity, and it is even more difficult to obtain well-dispersed slurries. At the same time, in order to obtain good high-viscosity slurries, long-term stirring is required, and the energy consumption is very high, which is very unfavorable for large-scale production.

[0003] However, nanomaterials and ultrafine powders have large specific surface areas and absorb a large amount of gas on their surfaces, which makes it difficult for these ultrafine powder materials to be wetted and dispersed in liquids and difficult to mix with liquids, resulting in slow dispersion of powders in liquids, high viscosity, high energy consumption, and poor efficiency. If a very high solid concentration is required with very little liquid, higher requirements are placed on the performance of the mixing and dispersing equipment, while traditional equipment only has a single structure and function and cannot adapt to the material characteristics of different powders and liquids.

[0004] Therefore, it is an urgent technical need to develop new solid-liquid mixing equipment and mixing methods that can adapt to high-viscosity slurries. Summary of the invention

[0005] The purpose of the present invention is to provide a solid-liquid mixing device suitable for high-viscosity materials and a mixing method using the device, which can adapt to the solid-liquid mixing and dispersion of high-viscosity slurries.

[0006] The technical solution adopted by the present invention is:

[0007] A solid-liquid mixing device suitable for high-viscosity materials, comprising a housing with a powder inlet pipe, a spiral feeding module, a liquid distribution module, a mixing and dispersing module, and a high-viscosity material discharge module;

[0008] The spiral feeding module is located in the housing and is used to convey the powder to be mixed;

[0009] The liquid distribution module is located on the circumference of the upper part of the shell and is used to inject the liquid to be mixed into the shell;

[0010] The mixing and dispersing module is located in the housing and is arranged at the lower end of the spiral feeding module, and is used to disperse and / or crush and mix the powder to be mixed and the liquid to be mixed;

[0011] The high-viscosity material discharge module is located at the discharge port of the shell and is used to discharge the slurry dispersed and / or crushed and mixed by the mixing and dispersing module.

[0012] The present invention is also characterized in that:

[0013] The mixing and dispersing module includes a dispersing cylinder and a dispersing disk, the dispersing disk is coaxially fixed in the dispersing cylinder, and the dispersing cylinder and the dispersing disk rotate coaxially with the spiral feeding module; a slit is provided between the dispersing cylinder and the inner wall of the shell, and a plurality of dispersing holes are evenly distributed on the outer wall of the dispersing cylinder.

[0014] The mixing and dispersing module also includes a powder scattering disk and mixing blades. The powder scattering disk is coaxially arranged at the lower end of the spiral feeding module to preliminarily break up large particles of powder to be mixed; the mixing blades are coaxially arranged between the powder scattering disk and the dispersing disk.

[0015] A partition is vertically arranged in the shell near the powder scattering disk, and is used to separate the powder to be mixed from the liquid to be mixed entering the shell.

[0016] It also includes a main shaft and a motor. The spiral feeding module is a spiral feeder. The spiral feeder is coaxially connected to the main shaft, and the upper end of the main shaft is connected to the motor.

[0017] The powder scattering disk, mixing blades and dispersing disk are all connected to the main shaft.

[0018] The liquid distribution module comprises at least one liquid feed pipe, and the liquid feed pipe is obliquely arranged on the circumference of the upper part of the shell.

[0019] Each of the liquid feed pipes is connected to a liquid feed pump.

[0020] The liquid inlet pump is a single screw pump or a twin screw pump.

[0021] The high-viscosity material discharge module is a twin-screw pump structure, and the twin-screw pump structure is a twin-screw spiral discharger driven to rotate by a motor.

[0022] It also includes a circulation tank, the discharge port of the high-viscosity material discharge module is communicated with the inlet of the circulation tank, and the outlet of the circulation tank is connected to the liquid feed pipe of the liquid distribution module.

[0023] Another technical solution of the present invention is:

[0024] The mixing method using the solid-liquid mixing equipment suitable for high-viscosity materials is as follows:

[0025] The powder to be mixed is transported to the mixing and dispersing module through the spiral feeding module, and the liquid to be mixed is transported to the mixing and dispersing module through the liquid distribution module. The powder to be mixed and the liquid to be mixed are dispersed and / or crushed and mixed in the mixing and dispersing module, and then the solid-liquid mixed slurry is discharged through the high-viscosity material discharge module.

[0026] Another technical solution of the present invention is also characterized in that:

[0027] The method further includes: the solid-liquid mixed slurry discharged from the high-viscosity material discharge module enters the circulation tank, and then enters the mixing and dispersing module through the liquid feed pipe of the liquid distribution module for re-mixing and dispersion.

[0028] In the method, the discharge speed is adjusted by adjusting the rotation speed of the twin-screw pump in the high-viscosity material discharge module, so that the discharge speed of the solid-liquid mixed slurry is greater than or equal to the feed speed of the liquid to be mixed.

[0029] Compared with the prior art, the present invention is a solid-liquid mixing device suitable for high-viscosity materials. The powder to be mixed is forced to be directly transported into the equipment through a spiral feeding module, and is in contact with the liquid to be mixed. First, preliminary rapid wetting is performed, and then high-speed dispersion is performed through a mixing and dispersing module, so that the solid and liquid are well mixed and have a strong dispersing ability; then, in the high-viscosity material discharge module, the high-viscosity slurry is stably discharged through a twin-screw pump with a strong suction function. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the solid-liquid mixing equipment suitable for high-viscosity materials of the present invention;

[0031] Figure 2 It is a partial cross-sectional view of the solid-liquid mixing device suitable for high-viscosity materials of the present invention;

[0032] Figure 3 This is a schematic structural diagram of Embodiment 1 of a solid-liquid mixing device suitable for high-viscosity materials of the present invention;

[0033] Figure 4 This is a schematic structural diagram of Example 2 of a solid-liquid mixing device suitable for high-viscosity materials of the present invention;

[0034] Figure 5 It is a partial structural schematic diagram of the solid-liquid mixing equipment suitable for high-viscosity materials of the present invention.

[0035] In the figure, 1. shell, 2. spiral feeding module, 3. liquid distribution module, 31. liquid feed pipe, 32. liquid inlet pump, 4. mixing and dispersing module, 41. dispersing cylinder, 42. dispersing hole, 43. powder scattering disk, 44. mixing blade, 45. dispersing disk, 5. high viscosity material discharge module, 6. slit, 7. partition, 8. main shaft, 9. motor, 10. circulation tank, 11. liquid storage tank, 12. powder feed pipe, 13. bracket. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0037] Embodiment 1:

[0038] The present invention provides a solid-liquid mixing device suitable for high-viscosity materials, such as Figure 1 As shown, it includes a shell 1 with a powder feeding pipe, a spiral feeding module 2, a liquid distribution module 3, a mixing and dispersing module 4 and a high-viscosity material discharge module 5; the spiral feeding module 2 is located in the shell 1 and is used to convey the powder to be mixed; the liquid distribution module 3 is located on the circumference of the upper part of the shell 1 and is used to inject the liquid to be mixed into the shell 1; the mixing and dispersing module 4 is located in the shell 1 and is arranged at the lower end of the spiral feeding module 2, and is used to disperse and / or crush and mix the powder to be mixed and the liquid to be mixed; the high-viscosity material discharge module 5 is located at the discharge port of the shell 1 and is used to discharge the slurry dispersed and / or crushed and mixed by the mixing and dispersing module 4.

[0039] like Figure 2 As shown, the mixing and dispersing module 4 includes a dispersing cylinder 41 and a dispersing disk 45, the dispersing disk 45 is coaxially fixed in the dispersing cylinder 41, and the outer wall of the dispersing cylinder 41 is provided with a hard alloy coating or a ceramic coating. The dispersing cylinder 41 and the dispersing disk 45 rotate coaxially with the spiral feeding module 2; a slit 6 is provided between the dispersing cylinder 41 and the inner wall of the housing 1, and a plurality of dispersing holes 42 are evenly distributed on the outer wall of the dispersing cylinder 41.

[0040] The mixing and dispersing module 4 also includes a powder scattering disk 43 and a mixing blade 44. The powder scattering disk 43 is coaxially arranged at the lower end of the spiral feeding module 2 to preliminarily break up the large particles of powder to be mixed; the mixing blade 44 is coaxially arranged between the powder scattering disk 43 and the dispersing disk 45.

[0041] A partition 7 is vertically arranged in the shell 1 near the powder scattering disk 43 to separate the powder to be mixed from the liquid to be mixed entering the shell 1 .

[0042] The screw feeder module 2 further comprises a main shaft 8 and a motor 9. The screw feeder module 2 is a screw feeder, and the screw feeder is a single screw screw feeder or a double screw screw feeder. The screw feeder is coaxially connected to the main shaft 8, and the upper end of the main shaft 8 is connected to the motor 9.

[0043] The powder scattering disk 43 , the mixing blades 44 and the dispersing disk 45 are all connected to the main shaft 8 .

[0044] like Figure 3 As shown, the liquid distribution module 3 includes at least one liquid feed pipe 31, and the liquid feed pipe 31 is obliquely arranged on the circumference of the upper part of the shell 1. Each of the liquid feed pipes 31 is connected to a liquid feed pump 32, and the liquid feed pump 32 is connected to the liquid storage tank 11. The liquid feed pump 32 is a single screw pump or a twin screw pump.

[0045] The high-viscosity material discharge module 5 is a twin-screw pump structure, and the twin-screw pump structure is a twin-screw spiral discharger driven to rotate by a motor.

[0046] Embodiment 2:

[0047] like Figure 4 As shown, embodiment 2 further includes a circulation tank 10 on the basis of embodiment 1, the discharge port of the high-viscosity material discharge module 5 is connected to the inlet of the circulation tank 10, and the outlet of the circulation tank 10 is connected to the liquid feed pipe 31 of the liquid distribution module 3. This embodiment can realize multiple circulation dispersion mixing of the slurry, so that the dispersion mixing effect is better.

[0048] like Figure 5 As shown, the whole device can be arranged on a bracket 13; the main shaft 8 inside the device is driven by a motor 9 to rotate and then drive the spiral feeding module 2 to feed, and the powder feeding pipe 12 is arranged on the side.

[0049] Embodiment 3:

[0050] The mixing method using the solid-liquid mixing equipment suitable for high-viscosity materials is as follows:

[0051] The powder to be mixed is transported to the mixing and dispersing module 4 through the spiral feeding module 2, and the powder to be mixed is firstly dispersed by the powder breaking disk 43 in the mixing and dispersing module 4; at the same time, the liquid to be mixed is transported to the mixing and dispersing module 4 through the liquid distribution module 3, and in this process, a small part of the liquid to be mixed flows obliquely through the slit 6, and the powder to be mixed and the liquid to be mixed are dispersed and / or crushed and mixed by the mixing blades 44 and the dispersion disk 45 in the mixing and dispersing module 4, and reach the slit 6 through the dispersion holes 42 opened on the outer wall of the dispersion cylinder 41, and the solid-liquid mixture is subjected to strong shearing when passing through the dispersion holes 42 to open and disperse the agglomerated particles, and finally the solid-liquid mixed slurry is discharged through the high-viscosity material discharge module 5.

[0052] Embodiment 4:

[0053] The method of Example 4 further includes, based on Example 3:

[0054] The solid-liquid mixed slurry discharged from the high-viscosity material discharge module 5 enters the circulation tank 10, and then enters the mixing and dispersion module 4 through the liquid feed pipe 31 of the liquid distribution module 3 for further mixing and dispersion; such cyclic mixing and dispersion can handle materials with large viscosity changes during the mixing process.

[0055] In the method, the discharge speed is adjusted by adjusting the rotation speed of the twin-screw pump in the high-viscosity material discharge module 5 so that the discharge speed of the solid-liquid mixed slurry is greater than or equal to the feed speed of the liquid to be mixed.

[0056] The above-mentioned high viscosity material refers to a material with a viscosity ranging from 3000 to 110000 cps (3,000 to 110,000 centipoise).

[0057] The present invention provides a solid-liquid mixing device and a mixing method that can adapt to high-viscosity materials, which can overcome the current difficulty in wetting high-concentration slurries of ultra-dispersed fine powder materials with large surface areas; the present invention designs a device combination of different functional modules, which can accelerate the wetting of the powder surface and fully mix it with the liquid.

[0058] In the prior art, the feeding method and the slurry discharge mode have certain requirements on the slurry viscosity of the material, and the applicable viscosity is about 50,000 cps or less. Although the viscosity of many products is lower than this value, in the process of mixing and dispersing, the viscosity of the slurry generally increases first and then decreases. Therefore, in its production process, the viscosity may exceed this range, causing the slurry to circulate poorly and cause shutdown accidents. Therefore, the present invention proposes a new principle, which does not need to consider the characteristics of powder and slurry too much, and can adapt to high-viscosity and high-concentration slurries.

[0059] In addition, with the development of nanomaterials and ultrafine powders, the mutual forces between powders are very large. The general feeding method easily causes the powders to form bridges during the feeding process, resulting in the cessation of powder feeding. Therefore, the present invention uses a spiral forced feeding method to ensure the adaptability to powders, especially ultrafine powders.

Claims

1. A solid-liquid mixing device suitable for high-viscosity materials, characterized in that: It includes a housing with a powder inlet pipe, a spiral feeding module, a liquid distribution module, a mixing and dispersing module, and a high-viscosity material discharge module; The spiral feeding module is located in the housing and is used to convey the powder to be mixed; The liquid distribution module is located on the circumference of the upper part of the shell and is used to inject the liquid to be mixed into the shell; The mixing and dispersing module is located in the housing and is arranged at the lower end of the spiral feeding module, and is used to disperse and / or crush and mix the powder to be mixed and the liquid to be mixed; The high-viscosity material discharge module is located at the discharge port of the shell and is used to discharge the slurry dispersed and / or crushed and mixed by the mixing and dispersing module. The high-viscosity material discharge module is a twin-screw pump structure, and the twin-screw pump structure is used to adjust the discharge speed so that the discharge speed of the slurry is greater than or equal to the feed speed of the liquid to be mixed; The mixing and dispersing module comprises a dispersing cylinder and a dispersing disk, wherein the dispersing disk is coaxially fixed in the dispersing cylinder, and the dispersing cylinder and the dispersing disk rotate coaxially with the spiral feeding module; a slit is provided between the dispersing cylinder and the inner wall of the shell, and a plurality of dispersing holes are evenly distributed on the outer wall of the dispersing cylinder; the dispersing cylinder is used to disperse the solid-liquid mixture obtained by mixing the powder to be mixed with the liquid to be mixed through the dispersing holes; The mixing and dispersing module further comprises a powder scattering disk and a mixing blade. The powder scattering disk is coaxially arranged at the lower end of the spiral feeding module and is used for preliminarily breaking up the large particles of powder to be mixed. The mixing blade is coaxially arranged between the powder scattering disk and the dispersing disk. A partition is vertically arranged in the shell near the powder scattering disk, for separating the powder to be mixed from the liquid to be mixed entering the shell; The shell, the dispersion tube and the partition are arranged in sequence and spaced apart from each other. Along the arrangement direction of the shell, the dispersion tube and the partition, the distance between the shell and the dispersion tube is smaller than the distance between the dispersion tube and the partition.

2. The solid-liquid mixing equipment suitable for high-viscosity materials according to claim 1, characterized in that: It also includes a main shaft and a motor. The spiral feeding module is a spiral feeder. The spiral feeder is coaxially connected to the main shaft, and the upper end of the main shaft is connected to the motor.

3. The solid-liquid mixing equipment suitable for high-viscosity materials according to claim 2, characterized in that: The powder scattering disk, mixing blades and dispersing disk are all connected to the main shaft.

4. The solid-liquid mixing equipment suitable for high-viscosity materials according to claim 2, characterized in that: The liquid distribution module includes at least one liquid feed pipe, which is obliquely arranged on the circumference of the upper part of the shell.

5. The solid-liquid mixing equipment suitable for high-viscosity materials according to claim 4, characterized in that: Each of the liquid feed pipes is connected to a liquid feed pump.

6. The solid-liquid mixing equipment suitable for high-viscosity materials according to claim 5, characterized in that: The liquid inlet pump is a single screw pump or a twin screw pump.

7. The solid-liquid mixing device suitable for high-viscosity materials according to any one of claims 1 to 6, characterized in that: The twin-screw pump structure is a twin-screw spiral discharger driven to rotate by a motor.

8. The solid-liquid mixing device suitable for high-viscosity materials according to any one of claims 4 to 6, characterized in that: It also includes a circulation tank, the discharge port of the high-viscosity material discharge module is communicated with the inlet of the circulation tank, and the outlet of the circulation tank is connected to the liquid feed pipe of the liquid distribution module.

9. A mixing method using the solid-liquid mixing device suitable for high-viscosity materials according to any one of claims 1 to 8, characterized in that: The method is: The powder to be mixed is transported to the mixing and dispersing module through the spiral feeding module, and the liquid to be mixed is transported to the mixing and dispersing module through the liquid distribution module. The powder to be mixed and the liquid to be mixed are dispersed and / or crushed and mixed in the mixing and dispersing module, and then the solid-liquid mixed slurry is discharged through the high-viscosity material discharge module.

10. The mixing method of the solid-liquid mixing equipment according to claim 9, characterized in that: The method further includes: The solid-liquid mixed slurry discharged from the high-viscosity material discharge module enters the circulation tank, and then enters the mixing and dispersing module through the liquid feed pipe of the liquid distribution module for re-mixing and dispersion; The inlet of the circulation tank is communicated with the outlet of the high-viscosity material discharge module, and the outlet of the circulation tank is connected to the liquid feed pipe of the liquid distribution module.

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