CN112717795B

CN112717795B - Pulping equipment for preparing high-solid-content slurry and slurry mixing system

Info

Publication number: CN112717795B
Application number: CN202011431390.XA
Authority: CN
Inventors: 石桥; 白淑娟
Original assignee: SHENZHEN SHANGSHUI INTELLIGENT EQUIPMENT CO Ltd
Current assignee: Shenzhen Shangshui Intelligent Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-10-28
Anticipated expiration: 2040-12-07
Also published as: CN112717795A

Abstract

The application provides a pulping equipment for preparing high solid content thick liquids, including the rotor of vertical setting and the stator that is located the rotor outside, follow rotor axial is provided with first protrusion structure on the rotor surface, is provided with the second protrusion structure on the stator surface, first protrusion structure and the mutual staggered arrangement of second protrusion structure, the clearance of stator and rotor divides into powder import district, powder in proper order from top to bottom breaks up the district, kneads the district and dilutes the dispersion district, it is provided with at least one inlet with diluting the dispersion district to knead the district, the liquid flow who kneads the district is less than the liquid flow who dilutes the dispersion district, dilutes the one end that the outside buffer unit of pulping equipment was connected in the dispersion district, and the inlet is connected with buffer unit's the other end. The pulping equipment has the advantages of both continuous pulping equipment and batch pulping equipment, and on the basis, the pulping system comprising the pulping equipment is provided.

Description

Pulping equipment for preparing high-solid-content slurry and slurry mixing system

Technical Field

The invention relates to the field of mixing of powder and liquid, in particular to pulping equipment and a slurry mixing system for preparing slurry with high solid content.

Background

In the fields of battery manufacturing, food, medicine, coating ink and the like, a large amount of powder particles and a small amount of liquid are required to be mixed to prepare slurry with high solid content, and because the powder contains nano materials and ultrafine powder, the specific surface is large, and a large amount of gas is adsorbed on the surface, the ultrafine powder materials are difficult to soak in the liquid, are not uniformly mixed and dispersed in the liquid, are easy to delaminate, are easy to agglomerate and precipitate and the like.

Therefore, in order to mix the powder particles with the liquid, the prior art mainly adopts batch-type and continuous-type processes. For batch pulping processes, the typical equipment commonly used is a double planetary mixer, and the pulping process usually comprises the following steps: mixing the powder, adding part of the liquid, kneading the mixture in a high-viscosity state, and continuously and successively adding the liquid for dilution and dispersion. The method has the advantages of simple equipment, strong adaptability to materials, easy variety switching, long required time and high energy consumption, and the uniformity and consistency of the slurry are difficult to ensure after the equipment is amplified. For the continuous pulping process, a double-screw structure is usually adopted, for example, a lithium battery positive and negative electrode slurry production process and system disclosed in chinese patent CN103268931B, in the pulping process, powder and liquid are put into different positions of a screw at accurately controlled flow rates, and the processes of powder mixing, kneading, diluting and the like are completed in different areas of the screw, so that the finished product slurry is continuously output. However, the mixing efficiency of the twin-screw structure to the powder is low, and further, for example, in a slurry production system for mixing a plurality of powders and liquids, which is disclosed in chinese patent CN206715709U, an independent powder mixer is provided to mix the powders. The pulping machine adopting the double screws has the advantages of continuous production, low energy consumption, good consistency of pulp, complex screw structure, large abrasion, high requirement on dynamic metering precision, poor adaptability to materials (various elements on the screws can be adjusted according to different materials) and difficult variety switching.

Therefore, in order to solve the above problems, a pulping apparatus and a pulp mixing system for preparing a high solid content pulp are needed in the pulp mixing field, which have the advantages of both batch pulping and continuous pulping processes.

Disclosure of Invention

The invention aims to provide pulping equipment and a pulp mixing system for preparing high-solid-content pulp, which have the advantages of a batch pulping process and a continuous pulping process by adopting a semi-continuous pulping process, namely simple structure, strong adaptability to materials, low energy consumption, good consistency of pulp, small abrasion and no need of high dynamic metering precision.

The invention provides pulping equipment for preparing high-solid-content slurry, which is characterized by comprising a vertically arranged rotor and a stator positioned outside the rotor, wherein a first protruding structure is arranged on the surface of the rotor along the axial direction of the rotor, a second protruding structure is arranged on the surface of the stator, the first protruding structure and the second protruding structure are arranged in a staggered mode, a gap between the stator and the rotor is sequentially divided into a powder inlet area, a powder scattering area, a kneading area and a diluting and dispersing area from top to bottom, at least one liquid inlet is arranged in the kneading area and the diluting and dispersing area, the liquid flow rate of the kneading area is smaller than that of the diluting and dispersing area, the diluting and dispersing area is connected with one end of a cache unit outside the pulping equipment, and the liquid inlet is connected with the other end of the cache unit.

In this proposal, the pulping apparatus is roughly divided into three regions, i.e., a powder scattering region, a kneading region, and a dilution and dispersion region, in terms of the steps of the pulping process. When powder is continuously fed into the rotor from the powder inlet area, the first protruding structure arranged on the rotor scatters the powder into a dispersion state; then under the action of gravity and a first protruding structure arranged on the rotor, the powder is firstly contacted with a small amount of liquid entering from the liquid inlet in the kneading area to form a solid-liquid mixture with high solid content and high viscosity. Kneading under the stirring action of the second protruding structure and the first protruding structure arranged on the stator and the rotor to promote the wetting of the liquid on the powder and carry out high-strength dispersion; then, the preliminarily dispersed solid-liquid mixture with high solid content enters the dilution dispersion area under the action of gravity and a first protruding structure arranged on the rotor to contact with a large amount of liquid entering from the liquid inlet, is diluted and further dispersed by the protruding structure on the stator and the rotor, so that the solid content of the solid-liquid mixture in the dilution dispersion area is smaller than that in the kneading area. And then the solid-liquid mixture in the dilution dispersion area is discharged out of the pulping equipment and enters an external buffer unit connected with the pulping equipment, at the moment, the solid content of the solid-liquid mixture in the buffer unit is smaller than that in the kneading area, the buffer unit conveys the solid-liquid mixture with low solid content into the pulping equipment again, so that the solid content in the solid-liquid mixture is continuously improved until the powder and the liquid raw materials to be mixed are all added, the solid content of the solid-liquid mixture reaches a preset value, and the indexes of the solid-liquid mixture, such as viscosity, fineness and the like, reach the preset values through further circulation.

The advantages of this pulping process are: the advantages of strong adaptability of batch type pulping process are kept, the advantages of high efficiency and low energy consumption of continuous pulping process are combined, and high dynamic metering precision required by the continuous pulping process is not required, so that the cost is reduced.

In one possible embodiment, the kneading zone and the dilution and dispersion zone are each provided with a liquid inlet.

Further, with reference to the first possible embodiment, a part of the liquid raw materials to be mixed is fed into the buffer unit in advance, the rest of the liquid raw materials are connected to the liquid inlet of the kneading zone, and the flow rate of the liquid raw materials is matched with the feeding flow rate of the powder, so that the solid content of the solid-liquid mixture in the kneading zone is maintained near the predetermined value; and the liquid inlet of the dilution dispersion area is connected with the buffer unit, the solid-liquid mixture with lower solid content in the buffer unit is conveyed to the dilution dispersion area, the solid content is increased and then returned to the buffer unit, the process is circulated until the powder and the liquid to be mixed are completely thrown, the solid content of the solid-liquid mixture reaches a preset value, and the indexes such as viscosity, fineness and the like of the solid-liquid mixture reach the preset value through further circulation.

In another possible embodiment, the kneading zone and the dilution and dispersion zone share a liquid inlet which covers both the kneading zone and the dilution and dispersion zone, but the flow channels of the kneading zone are smaller than those of the dilution and dispersion zone.

Further, in combination with the second possible embodiment, the buffer unit is connected to the liquid inlet, and at this time, all the liquid raw materials to be mixed are fed into the buffer unit, and the liquid raw materials are fed into the kneading zone and the dilution and dispersion zone through the liquid inlet. Mixing the powder raw material falling from the powder scattering area with a small amount of liquid in the kneading area to form a solid-liquid mixture with high solid content, after mixing and dispersing in the kneading area, feeding the solid-liquid mixture with high solid content into the diluting and dispersing area, diluting the solid-liquid mixture with high solid content into a solid-liquid mixture with low solid content, further dispersing, discharging the solid-liquid mixture with low solid content into the buffer unit, feeding the solid-liquid mixture with low solid content in the buffer unit into the kneading area and the diluting and dispersing area of the pulping equipment through the liquid inlet, circulating the steps until the powder is completely fed, and feeding the solid content of the solid-liquid mixture to a preset value, and further circulating the steps to ensure that the indexes such as viscosity, fineness and the like of the solid-liquid mixture reach the preset value. In one possible embodiment, in order to mix the powder with the liquid more sufficiently, the first projection structures on the rotors of the kneading zone and the dilution and dispersion zone and the second projection structures on the adjacent stators have a gap of 1 mm to 10 mm in the axial direction.

In a possible embodiment, the long axis direction of the cross section of the first protruding structure on the rotor has a certain inclination angle relative to the axial direction of the rotor, so that the rotor can generate a downward pushing force on the material when rotating.

In one possible embodiment, besides the protruding structures on the stator and rotor, baffles can be arranged in the dilution dispersion area to form small-gap dispersion structures between the stator and rotor, so that the dispersion is further enhanced. The gap between the baffles on the stator and the rotor is 1 mm to 5 mm.

In a possible embodiment, a discharge area may also be provided below or outside the dilution and dispersion area, wherein discharge blades are provided, which are fixedly connected to the rotor body, push the slurry in the discharge area to rotate and discharge the slurry under centrifugal force in a substantially tangential direction through a pipe into the buffer unit.

In a second aspect, a slurry mixing system is provided, which includes the slurry preparation apparatus as described in the first aspect and the possible embodiments of the first aspect, and a buffer unit, a powder input apparatus, and a liquid input apparatus, wherein the powder input apparatus is connected to a powder inlet region of the slurry preparation apparatus, and the liquid input apparatus is used for conveying liquid between the buffer unit and the slurry preparation apparatus.

Drawings

FIG. 1 is a cross-sectional view of a pulping apparatus according to an embodiment of the invention;

FIG. 2 is an external perspective view of a pulping apparatus according to an embodiment of the invention;

FIG. 3 is a top cross-sectional view of a dilution and dispersion zone of a pulping apparatus in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a rotor and discharge vanes in accordance with one embodiment of the present invention;

FIG. 5 is a top view of a rotor according to an embodiment of the present invention;

FIG. 6 is a top view of a stator according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a pulping apparatus according to another embodiment of the invention;

FIG. 8 is an external perspective view of a pulping apparatus according to another embodiment of the invention;

FIG. 9 is a top cross-sectional view of a dilution and dispersion zone of a pulping apparatus according to another embodiment of the invention;

FIG. 10 is a schematic view of a rotor and discharge vanes in another embodiment of the present invention;

FIG. 11 is a top view of a rotor according to another embodiment of the present invention;

FIG. 12 is a top view of a stator according to another embodiment of the present invention;

FIG. 13 is a schematic view of a slurry mixing system according to one embodiment of the present invention;

FIG. 14 is a schematic view of a slurry mixing system according to one embodiment of the present invention.

Symbolic description of main components

Detailed Description

In order to make the objects, principles, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration and not limitation.

It should be particularly noted that, in the description of the present invention, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate orientations or positional relationships that can be determined based on the orientations or positional relationships shown in the drawings, and the connections or positional relationships are partially omitted or not shown in the drawings for the sake of simplicity.

According to the description of the background art, the pulping equipment and the pulping system provided by the application are particularly suitable for the scene of mixing a large amount of superfine powder and a small amount of liquid, have the advantages of batch pulping and continuous pulping, and are designed to be more suitable for the process of circular pulping.

Referring to fig. 1 to 6, an embodiment of a pulping apparatus 10 of the present application includes a vertically arranged rotor 105 and a stator 106 located outside the rotor 105, wherein a first protruding structure 1051 is disposed on a surface of the rotor 105 along an axial direction of the rotor 105, a second protruding structure 1061 is disposed on a surface of the stator 106, and the first protruding structure 1051 and the second protruding structure 1061 are staggered; the gap between the stator 106 and the rotor 105 is divided into a powder inlet area 101, a powder scattering area 102, a kneading area 103, and a dilution and dispersion area 104 from top to bottom. Preferably, the first and

second projecting structures

1051 and 1061 cover the kneading zone 103 and the dilution and dispersion zone 104; also, in order to mix the powder with the liquid more sufficiently, in some embodiments, the gap in the axial direction between the first projecting structure 1051 on the rotor 105 of the kneading zone 103 and the dilution and dispersion zone 104 and the second projecting structure 1061 on the adjacent stator 106 is 1 mm to 10 mm. The kneading zone 103 and the dilution and dispersion zone 104 are respectively provided with a liquid inlet 109, the liquid flow rate of the kneading zone 103 is larger than that of the dilution and dispersion zone 104, and in the embodiment, the diameter of the liquid inlet 109 of the kneading zone 103 is smaller than that of the liquid inlet 109 of the dilution and dispersion zone 104. The long axis direction of the cross section of the first protruding structure 1051 on the rotor 105 has a certain inclination angle with respect to the axial direction of the rotor 105, so that the rotor 105 can generate a downward pushing force on the material when rotating.

The solid-liquid mixture in the dilution and dispersion area 104 is discharged to the buffer unit 40 outside the pulping equipment connected with the dilution and dispersion area 104, and the buffer unit 40 is connected with the liquid inlet 109, it can be understood that the buffer unit 40 here includes all containers having the capability of storing the solid-liquid mixture, specifically, a buffer tank, and "connection" can be understood as a pipeline connection or the like. In the embodiment of fig. 1, the buffer unit 40 is connected to the liquid inlet 109 of the dilution and dispersion area 104, i.e. a circulation path is formed between the solid-liquid mixture from the dilution and dispersion area 104 to the buffer unit 40 and then to the dilution and dispersion area 104, and the solid-liquid mixture is continuously circulated therein to meet the requirements on indexes such as solid content, viscosity, fineness and the like.

The following describes in detail the connection relationship and the function of each component in this embodiment with reference to the working process of this embodiment:

powder is put into the pulping equipment through a powder inlet 1011 arranged on the powder inlet area 101, optionally, a screw conveying equipment is adopted in the process, the powder is conveyed to a powder scattering area 102 of the pulping equipment, and the powder is scattered into a dispersed state by a first protruding structure 1051 on a rotor 105;

a part of liquid raw materials are put into the buffer unit 40 in advance, the rest part of liquid raw materials are conveyed to the kneading area 103 from a liquid inlet 109 arranged on the kneading area 103 according to the flow rate matched with the flow rate of the powder, the powder coming out of the powder scattering area 102 enters the kneading area 103 to be mixed with the liquid, so that a solid-liquid mixture with high solid content is formed, and preliminary dispersion is carried out;

it should be noted that the process of powder delivery is synchronized with the delivery of this portion of liquid feedstock, i.e., both powder and liquid are added step by step, and the addition is done simultaneously.

Then the solid-liquid mixture with high solid content enters a dilution dispersion area 104 positioned at the lower part of the kneading area 103 under the action of gravity, the liquid flow of a liquid inlet 109 of the dilution dispersion area 104 is larger than that of the kneading area 103, and the solid-liquid mixture with high solid content and a large amount of liquid conveyed by the liquid inlet 109 of the dilution dispersion area 104 are mixed into a solid-liquid mixture with lower solid content and are further dispersed;

the low solid content solid-liquid mixture (slurry) from the dilution dispersion zone 104 is discharged out of the pulping equipment and enters the buffer unit 40; preferably, a discharge area 108 may be disposed below or outside the dilution and dispersion area 104, wherein a discharge blade 1081 fixedly connected to the body of the rotor 105 is disposed, the discharge blade 1081 pushes the slurry in the discharge area 108 to rotate and discharges the slurry substantially tangentially under the centrifugal force, and the slurry enters the buffer unit 40 through a pipe (it is understood that the pipe and the liquid inlet 109 are not the same structure). In one embodiment, baffles 107 are further disposed on the stator and rotor in the dilution and dispersion zone, and particularly, the baffles 107 are wavy, and a gap of 1 mm to 5 mm is formed between the baffles 107.

The low solid content slurry in the buffer unit 40 is conveyed to the dilution and dispersion area 104 of the pulping equipment from a liquid inlet 109 with a large diameter arranged in the dilution and dispersion area 104, is mixed with the solid-liquid mixture with high solid content from the kneading area 103, returns to the buffer unit 40 after the solid content is further increased, and circulates in the same way until all the powder and liquid raw materials are fed, and the solid content of the slurry reaches a set value.

And continuously conveying the pulp from the buffer unit 40 to a dilution and dispersion area 104 of the pulping equipment, further dispersing the pulp under the action of the stator and the rotor, and returning the pulp to the buffer unit 40, and circulating the steps until the indexes such as the viscosity, the fineness and the like of the pulp reach set values.

It should be noted that it is necessary for the division of the various zones of the pulping apparatus and for the different zones to be provided with different structures, corresponding to the process of pulping. The division of regions is not merely by function but in combination with the division of structures. For example, it is necessary to provide the powder scattering area 102 above the kneading area 103, since the slurry making apparatus of the present application is generally used for mixing ultrafine powder, the ultrafine powder has a large specific surface area, and the kneading area 103 mainly kneads the powder with a small amount of liquid raw material, and if the powder scattering area 102 is not provided, the powder is not sufficiently mixed with the liquid raw material when entering the kneading area 103, and the agglomeration phenomenon is likely to occur. And the pulping equipment that adopts the twin-screw structure among the prior art, because the twin-screw is not good to the mixed effect of breaing up of powder, generally adopt external powder to mix and break up equipment, mix or break up the powder earlier, carry to the twin-screw equipment afterwards and mediate, whole equipment becomes complicated and occupation space is big like this.

That is, the division of the regions in the present application does not need to be very precise, and it is satisfied that each region has a structure that realizes a corresponding function, and thus the present application falls within the protection scope.

Fig. 7-12 illustrate another embodiment of the pulping apparatus 10 of the present application. The difference from the embodiment of fig. 1 is that in this embodiment, the external liquid inlet 109 is omitted, and only one liquid inlet 109 is provided, and the liquid inlet 109 covers the kneading zone 103 and the dilution and dispersion zone 104, and the kneading zone 103 and the dilution and dispersion zone 104 can still be understood as being connected by the liquid inlet 109. It should be noted that in order to ensure that the liquid flow rate of the kneading zone 103 is smaller than that of the dilution and dispersion zone 104. In this embodiment, the liquid inlet 109 is designed to cover the kneading zone 103 and the dispersing zone, and the size of the liquid inlet 109 is controlled so that a small part of the liquid enters the kneading zone 103 and a large part of the liquid enters the dilution and dispersion zone 104, and optionally, in a possible embodiment, the liquid flow path of the kneading zone 103 is smaller than that of the dilution and dispersion zone 104.

Correspondingly, the working process of the pulping apparatus is also different from the working process of the embodiment of fig. 1, and specifically, the connection and the working mode of each component are described with reference to the working process of the embodiment shown in fig. 7:

the powder conveying equipment 30 positioned outside the pulping equipment conveys powder from a powder inlet 1011 of the powder inlet area 101 to a powder scattering area 102 of the pulping equipment, and the powder is scattered into a dispersed state in the area by a first protruding structure 1051 on the rotor 105;

liquid raw materials are put into the buffer unit 40, the liquid in the buffer unit 40 is conveyed to the kneading area 103 and the dilution and dispersion area 104 through the liquid inlet 109, the powder from the powder dispersion area 102 enters the kneading area 103 to be mixed with the liquid, and a solid-liquid mixture with high solid content is formed and is subjected to preliminary dispersion;

the high solid content solid-liquid mixture from the kneading zone 103 enters the dilution dispersion zone 104 to be further mixed with liquid to become a lower solid content solid-liquid mixture, and is further dispersed;

the solid-liquid mixture (slurry) from the dilution and dispersion zone 104 enters a discharge zone 108 and then is discharged out of the pulping equipment and enters a buffer unit 40;

and the slurry in the buffer unit 40 is conveyed to the kneading area 103 and the diluting and dispersing area 104 in the pulping equipment from the liquid inlet 109, and then returns to the buffer unit 40 after the solid content is further increased, and the process is circulated until the powder is completely fed and the solid content of the slurry reaches a set value.

And continuously conveying the slurry from the buffer unit 40 to the pulping equipment, further dispersing the slurry under the action of the stator and the rotor, returning the slurry to the buffer unit 40, and circulating the process until the indexes such as the viscosity, the fineness and the like of the slurry reach set values.

It can be understood that the embodiment of fig. 1 and the embodiment of fig. 7 adopt different working modes due to different arrangement positions of the liquid inlet 109, the liquid inlet 109 of the kneading zone 103 of the embodiment of fig. 1 is used for feeding liquid raw materials, and the flow rate needs to be matched with the flow rate of the powder, but the requirement on the precision of dynamic metering is not high here, and only the solid content of the solid-liquid mixture in the kneading zone 103 needs to be ensured to be stable around a set value. The kneading zone 103 and the dilution and dispersion zone 104 of the embodiment of fig. 7 share a large liquid inlet 109, the liquid raw material is directly fed into the buffer unit 40, and then the liquid is circulated between the slurry making equipment and the buffer unit 40, and the solid content of the solid-liquid mixture in the kneading zone 103 is not fixed, but gradually increases with the feeding of the powder. However, the embodiment of FIG. 1 is the same as that of FIG. 7 in that the solid-liquid mixture in the kneading zone 103 always has a solid content larger than that in the diluting and dispersing zone 104 and that the buffer units 40 are connected to the liquid inlet 109.

The pulping process combined with the pulping equipment has the advantages that: the advantages of strong adaptability of batch type pulping process are kept, the advantages of high efficiency and low energy consumption of continuous pulping process are combined, and high dynamic metering precision required by the continuous pulping process is not required, so that the cost is reduced.

As for the structure of the pulping equipment, the pulping equipment adopts a simple stator-rotor structure with a first protruding structure and a second protruding structure, the clearance between the stator and the rotor is larger, usually larger than 2 mm, and the requirement on the dimensional accuracy is not high. However, the relative motion between the stator and the rotor with the convex structure can sufficiently stir the solid-liquid mixture to form a complex flow field, thereby realizing the high-efficiency mixing and dispersion of the materials. In contrast, the twin screw machine can achieve mixing and dispersion, but the flight structure on the screw is complex and has small gaps, usually less than 1 mm. In addition, the long shaft of the screw leads to high requirements for dimensional accuracy, resulting in high overall equipment costs.

As described above, on the basis of the embodiments shown in fig. 1 and 7, the present application provides a slurry mixing system, which includes a powder conveying device 30, a liquid conveying device 20, a buffer unit 40, and the slurry making device shown in the embodiments shown in fig. 1 and 7, wherein a solid-liquid mixture discharged from a dilution and dispersion zone 104 of the slurry making device is conveyed to the buffer unit 40, and the solid-liquid mixture in the buffer unit 40 enters the slurry making device through the liquid conveying device 20 and a liquid inlet 109. It should be noted that for the embodiment of FIG. 1, the inlet 109 is an inlet 109 located in dilution dispersion zone 104, and the corresponding slurry mixing system is shown in FIG. 13; for the embodiment of FIG. 7, the liquid inlet 109 is a liquid inlet 109 covering the kneading zone 103 and the dilution and dispersion zone 104, and the corresponding slurry mixing system is shown in FIG. 14. The powder conveying device 30 is connected with a powder inlet 1011 of the pulping device, and is preferably a screw feeding device, and the liquid conveying device 20 is preferably a conveying pump. It is noted that, whether in the embodiment of fig. 13 or the embodiment of fig. 14, there is a circulation of the solid-liquid mixture between the dilution and dispersion zone 104 and the buffer unit 40; however, in contrast to FIG. 13, the embodiment of FIG. 14 has at the same time a circulation between the kneading zone 103 and the buffer unit 40 with one less inlet 109.

It should be noted that, in the foregoing embodiment, each included module is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, the specific names of the functional units are only for the convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The pulping equipment for preparing the high-solid-content slurry is characterized by comprising a vertically arranged rotor and a stator positioned outside the rotor, wherein a first protruding structure is arranged on the surface of the rotor in the axial direction of the rotor, a second protruding structure is arranged on the surface of the stator, the first protruding structure and the second protruding structure are arranged in a staggered mode, a gap between the stator and the rotor is sequentially divided into a powder inlet area, a powder scattering area, a kneading area and a diluting and dispersing area from top to bottom, at least one liquid inlet is formed in the kneading area and the diluting and dispersing area, the liquid flow of the kneading area is smaller than that of the diluting and dispersing area, the diluting and dispersing area is connected with one end of a cache unit outside the pulping equipment, and at least one liquid inlet is connected with the other end of the cache unit.

2. A pulping apparatus according to claim 1, characterized in that the kneading zone and the dilution and dispersion zone are provided with a liquid inlet, respectively.

3. A pulping apparatus according to claim 1, characterized in that the kneading zone shares a liquid inlet with the dilution and dispersion zone.

4. The pulping apparatus of claim 2, wherein the liquid inlet of the kneading zone is connected to the liquid raw materials to be mixed, and the liquid inlet of the dilution and dispersion zone is connected to the buffer unit.

5. Pulping apparatus according to claim 3, characterized in that the buffer unit is connected to the liquid inlet.

6. A pulping apparatus according to claim 4 or 5, characterized in that the gap in the axial direction between the first projection on the rotor of the kneading zone and dilution and dispersion zone and the second projection on the adjacent stator is 1 mm to 10 mm.

7. The pulping apparatus of claim 1, wherein the long axis of the cross section of the first projection structure on the rotor is inclined relative to the axial direction of the rotor so that the rotor can generate a downward driving force on the pulp when rotating.

8. The pulping apparatus of claim 7, further comprising baffles positioned on the stator and rotor in the dilution and dispersion zone, wherein a gap of 1 mm to 5 mm is formed between the baffles.

9. A pulping apparatus according to claim 8, further comprising a discharge area below or outside the dilution and dispersion area, wherein discharge blades are arranged in fixed connection with the rotor body, which blades propel the pulp in the discharge area to a rotating motion and discharge the pulp under centrifugal force in a substantially tangential direction.

10. A slurry mixing system comprising the pulping apparatus of claim 1, and a buffer unit, a powder input apparatus, and a liquid input apparatus, wherein the powder input apparatus is connected to a powder inlet region of the pulping apparatus, and the liquid input apparatus is used for conveying liquid between the buffer unit and the pulping apparatus.