Horizontal three-shaft propeller washing equipment

Abstract

The utility model discloses horizontal three-shaft propeller washing equipment which comprises a sealed cylinder, a stirring mechanism is arranged in the sealed cylinder and comprises a first stirring shaft, a second stirring shaft and a third stirring shaft, and the first stirring shaft, the second stirring shaft and the third stirring shaft are transversely distributed in the sealed cylinder in a triangular mode. Spiral stirring paddles are arranged on the first stirring shaft, the second stirring shaft and the third stirring shaft. According to the utility model, the three stirring shafts distributed in a triangular manner are used for stirring, washing, shearing and crushing slurry in the sealed cylinder in all directions, so that the stirring and mixing effect of the slurry can be effectively improved, the resource utilization rate can be remarkably improved, and the stirring and washing device has the advantages of simple structure, convenience in operation, good sealing effect, high stirring efficiency, good slurry washing effect and the like; the battery-grade lithium carbonate slurry washing device is novel slurry washing equipment, can be widely used for preparing battery-grade lithium carbonate, can obtain high-quality battery-grade lithium carbonate with proper granularity and low impurity content, and is high in use value and good in application prospect.

Description

Technical Field

[0001] The utility model belongs to the field of stirring equipment and relates to a horizontal three-shaft spiral pulp washing equipment. Background Art

[0002] Lithium carbonate is the most basic and important product in the lithium industry. With the widespread application of lithium batteries in electronics, new energy electric vehicles, and other fields, the demand for battery-grade lithium carbonate slurry, a key base raw material for lithium batteries, has increased dramatically. Furthermore, battery-grade lithium carbonate is used as an electrolyte additive in lithium-ion batteries to improve battery safety and extend battery life. Therefore, it is essential to obtain high-quality battery-grade lithium carbonate with a suitable particle size and low impurity content.

[0003] In the production process of battery-grade lithium carbonate, lithium ore is usually used as raw material to first make industrial-grade lithium carbonate, and then they are subjected to corresponding refining processes to extract battery-grade lithium carbonate. The corresponding refining process includes slurry washing of industrial-grade lithium carbonate to effectively remove a large amount of impurities contained in the industrial-grade lithium carbonate. In addition, the slurry washing process also includes washing the battery-grade lithium carbonate to further reduce the impurities contained in the battery-grade lithium carbonate. However, in the existing slurry washing equipment, some stirring devices adopt an open structure, which is prone to splashing during the stirring process of lithium carbonate slurry (such as industrial-grade lithium carbonate slurry or battery-grade lithium carbonate slurry), and during the stirring process of lithium carbonate slurry, the raw materials are easily accumulated at the bottom of the stirring device, resulting in uneven and insufficient stirring, resulting in poor impurity removal effect. At the same time, the stirring devices used in existing slurry washing equipment are mostly vertical or single-axis, which are insufficient for stirring and washing the corners of the equipment and the shearing degree of the particles, resulting in excessively large product particle size and poor slurrying effect. Therefore, obtaining a pulping equipment with simple structure, easy operation, good sealing effect, high stirring efficiency and good pulping effect is of great significance for obtaining high-quality battery-grade lithium carbonate with suitable particle size and low impurity content. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a horizontal three-shaft spiral pulp washing equipment with simple structure, convenient operation, good sealing effect, high stirring efficiency and good pulp washing effect in view of the deficiencies in the existing technology.

[0005] In order to solve the above technical problems, the present utility model adopts the following technical solutions.

[0006] A horizontal three-shaft spiral pulp washing equipment includes a sealed cylinder, a stirring mechanism is provided in the sealed cylinder, and the stirring mechanism includes a first stirring shaft, a second stirring shaft, and a third stirring shaft; the first stirring shaft, the second stirring shaft, and the third stirring shaft are arranged laterally in the sealed cylinder in a triangular distribution; the first stirring shaft, the second stirring shaft, and the third stirring shaft are all provided with spiral stirring paddles.

[0007] As a further improvement of the above technical solution: the first stirring shaft and the second stirring shaft are on the same horizontal plane, and the third stirring shaft is located above the first stirring shaft and the second stirring shaft, so that the first stirring shaft, the second stirring shaft, and the third stirring shaft are distributed in a regular triangle.

[0008] As a further improvement of the above technical solution: the first stirring shaft and the second stirring shaft are on the same horizontal plane, and the third stirring shaft is located below the first stirring shaft and the second stirring shaft, so that the first stirring shaft, the second stirring shaft, and the third stirring shaft are distributed in an inverted triangle.

[0009] As a further improvement of the above technical solution: the ratio of the height of the horizontal plane where the first stirring shaft and the second stirring shaft are located to the height of the sealing cylinder is 1 / 3 to 2 / 3; the ratio of the height of the third stirring shaft to the height of the sealing cylinder is 1 / 3 to 2 / 3.

[0010] As a further improvement of the above technical solution: when in use, the first stirring shaft and the second stirring shaft rotate in the same direction.

[0011] As a further improvement of the above technical solution: a first spiral stirring propeller and a second spiral stirring propeller are provided on the first stirring shaft, the first spiral stirring propeller is located at one-eighth of the length of the first stirring shaft from left to right, and the second spiral stirring propeller is located at seven-eighths of the length of the first stirring shaft from left to right; the spiral blades of the first spiral stirring propeller and the second spiral stirring propeller are distributed counterclockwise along the circumferential direction on the first stirring shaft; the number of spiral blades of the first spiral stirring propeller and the second spiral stirring propeller are both 3, and the interval angle between each spiral blade is 120°.

[0012] As a further improvement of the above technical solution: a third spiral stirring propeller and a fourth spiral stirring propeller are provided on the second stirring shaft, the third spiral stirring propeller is located at one-eighth of the length of the second stirring shaft from left to right, and the fourth spiral stirring propeller is located at seven-eighths of the length of the second stirring shaft from left to right; the spiral blades of the third spiral stirring propeller and the fourth spiral stirring propeller are distributed clockwise along the circumferential direction on the second stirring shaft; the number of spiral blades of the third spiral stirring propeller and the fourth spiral stirring propeller are both 3, and the interval angle between each spiral blade is 120°.

[0013] As a further improvement of the above technical solution: a fifth spiral stirring propeller is provided on the third stirring shaft, and the fifth spiral stirring propeller is located in the middle of the third stirring shaft; the spiral blades of the fifth spiral stirring propeller are distributed on the third stirring shaft along the circumferential direction; the number of spiral blades of the fifth spiral stirring propeller is 3, and the interval angle between each spiral blade is 120°.

[0014] As a further improvement of the above technical solution: a first motor and a second motor are also provided on the outside of the sealing cylinder; the output end of the first motor is connected to the first stirring shaft and the second stirring shaft respectively through connecting gears; the connecting gear is a twill transmission tooth, which is located between the first stirring shaft and the second stirring shaft.

[0015] As a further improvement of the above technical solution: the output end of the second motor is connected to the third stirring shaft.

[0016] As a further improvement of the above technical solution: a feed port is also provided above the sealing cylinder; a slurry baffle for sealing the feed port is movably connected below the feed port, and when feeding is required, the slurry baffle is tilted downward by 30°; a sealing rubber ring is also provided on the bucket mouth below the feed port.

[0017] As a further improvement of the above technical solution: a porous plate is provided below the sealing cylinder; the porous plate is located below the stirring mechanism; a plurality of holes are provided on the porous plate; the pore size of the holes is smaller than the particle size of lithium carbonate; the porous plate is a ceramic plate.

[0018] As a further improvement of the above technical solution: a discharge port is provided below the sealing cylinder, and the discharge port is located between the porous plate and the stirring mechanism.

[0019] As a further improvement of the above technical solution: an air inlet is provided below the sealing cylinder.

[0020] As a further improvement of the above technical solution: a liquid outlet is provided at the bottom of the sealing cylinder, and the liquid outlet is located below the porous plate.

[0021] As a further improvement of the above technical solution: the liquid outlet is connected with a three-way pipe, one end of the three-way pipe is connected with the air inlet, and the other end is connected with a liquid discharge pipe.

[0022] An air compressor is provided on the pipeline between the three-way pipeline and the air inlet.

[0023] As a further improvement of the above technical solution: a first ball valve is provided on the pipe between the liquid outlet and the three-way pipe; a second ball valve is provided on the pipe between the three-way pipe and the air compressor; a third ball valve is provided on the drain pipe; and a fourth ball valve is provided on the pipe between the air compressor and the air inlet.

[0024] As a further improvement of the above technical solution: the outside of the sealing cylinder is covered with a jacket; the jacket comprises a heating layer and a heat insulation layer from the inside to the outside.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] (1) In the horizontal three-axis spiral pulp washing equipment of the present invention, a stirring mechanism is provided in the sealed cylinder, which includes three stirring shafts arranged transversely in the sealed cylinder and distributed in a triangular shape. The rotation of the three stirring shafts drives the spiral stirring blades to rotate, forming three high-speed vortices in the sealed cylinder. These high-speed vortices can drive the slurry to move in the sealed cylinder in a turbulent form, thereby achieving all-round stirring and washing of the slurry in the sealed cylinder. Moreover, the intersection of these high-speed vortices has a very strong shear force, so that the slurry can also be sheared in all directions during the stirring and washing process, making the slurry more uniform, and the particle size in the slurry smaller, while making the impurity content in the particles lower. In addition, pulp washing in the sealed cylinder can overcome the problem of slurry splashing.

[0027] (2) In the horizontal three-shaft spiral pulp washing equipment of the present invention, the rotating blades on the first stirring shaft and the second stirring shaft are set in opposite directions. Therefore, when the first stirring shaft and the second stirring shaft rotate in the same direction, the rotating blades can be used to perform counter-rotating shear stirring on the slurry in the sealed cylinder, which is more conducive to obtaining particles with small particle size and low impurity content.

[0028] (3) In the horizontal three-axis spiral pulp washing equipment of the present invention, a pulp baffle for sealing the feed inlet is movably connected below the feed inlet. On the one hand, the feed inlet is sealed by the pulp baffle during the stirring and washing process to prevent the pulp from splashing. On the other hand, during the feeding process, the downward-inclined pulp baffle not only does not reduce the feeding rate, but can also prevent the pulp from splashing during feeding to a certain extent.

[0029] (4) In the horizontal three-axis spiral pulp washing equipment of the present invention, a porous plate is provided at the bottom of the sealed cylinder, and solid-liquid separation can be achieved through the filtering effect of the porous plate. At the same time, after the pulp washing is completed, the porous plate can also be used as an aeration device, and the solid phase on the porous plate can be blown off by the action of the air compressor. On the one hand, it can promote the solid phase to be broken from the porous plate by the air flow, which can greatly reduce the proportion of large pieces of adhesive powder. On the other hand, it can also work together with the residual heat in the sealed cylinder to dry the solid phase. It is a drying and pulp washing integrated equipment that can meet actual production needs, will not cause equipment material accumulation, and is conducive to improving production efficiency and production quality.

[0030] (5) The horizontal three-axis spiral pulping equipment of the utility model utilizes three stirring shafts distributed in a triangle to carry out all-round stirring, shearing and crushing of the pulp in the sealed cylinder, which can effectively improve the stirring and mixing effect of the pulp and significantly improve the resource utilization rate. It has the advantages of simple structure, convenient operation, good sealing effect, high stirring efficiency and good pulping effect. It is a new type of pulping equipment that can be widely used in the preparation of battery-grade lithium carbonate. It can obtain high-quality battery-grade lithium carbonate with suitable particle size and low impurity content, has high use value and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0032] Figure 1 This is a structural diagram of the horizontal three-shaft spiral pulp washing equipment in Example 1 of the utility model.

[0033] Figure 2 This is a left view of the stirring mechanism in Example 1 of the present utility model.

[0034] Figure 3 This is a top view of the stirring mechanism in Example 1 of the present invention.

[0035] Legend:

[0036] 1. Feed port; 2. Sealing cylinder; 3. Jacket; 4. First motor; 5. Second motor; 6. Discharge port; 7. First stirring shaft; 8. Second stirring shaft; 9. Third stirring shaft; 10. Pulp retaining plate; 11. First spiral stirring paddle; 12. Second spiral stirring paddle; 13. Third spiral stirring paddle; 14. Fourth spiral stirring paddle; 15. Fifth spiral stirring paddle; 16. Perforated plate; 17. Air compressor; 18. First ball valve; 19. Second ball valve; 20. Third ball valve; 21. Fourth ball valve. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0038] Example 1:

[0039] like Figures 1 to 3 As shown, the horizontal three-axis spiral pulp washing equipment of this embodiment includes a sealed cylinder 2, a stirring mechanism is provided in the sealed cylinder 2, and the stirring mechanism includes a first stirring shaft 7, a second stirring shaft 8, and a third stirring shaft 9; the first stirring shaft 7, the second stirring shaft 8, and the third stirring shaft 9 are horizontally arranged in the sealed cylinder 2 in a triangular distribution; the first stirring shaft 7, the second stirring shaft 8, and the third stirring shaft 9 are all provided with spiral stirring paddles.

[0040] like Figure 1 and Figure 3 As shown, in this embodiment, the first stirring shaft 7 and the second stirring shaft 8 are on the same horizontal plane, and the third stirring shaft 9 is located above the first stirring shaft 7 and the second stirring shaft 8, so that the first stirring shaft 7, the second stirring shaft 8, and the third stirring shaft 9 are distributed in a regular triangle.

[0041] In another embodiment, the first stirring shaft 7 and the second stirring shaft 8 are on the same horizontal plane, and the third stirring shaft 9 is located below the first stirring shaft 7 and the second stirring shaft 8, so that the first stirring shaft 7, the second stirring shaft 8, and the third stirring shaft 9 are distributed in an inverted triangle.

[0042] In this embodiment, when in use, the first stirring shaft 7 and the second stirring shaft 8 rotate in the same direction.

[0043] like Figure 1 As shown, in this embodiment, the ratio of the height of the horizontal plane where the first stirring shaft 7 and the second stirring shaft 8 are located to the height of the sealing cylinder 2 is 1 / 3, that is, the first stirring shaft 7 and the second stirring shaft 8 are respectively arranged at two-thirds from top to bottom of the sealing cylinder 2; the ratio of the height of the third stirring shaft 9 to the height of the sealing cylinder 2 is 2 / 3, that is, the third stirring shaft 9 is arranged at one-third from top to bottom of the sealing cylinder 2.

[0044] like Figure 2 As shown, in this embodiment, a first spiral stirring paddle 11 and a second spiral stirring paddle 12 are provided on the first stirring shaft 7. The first spiral stirring paddle 11 is located at one-eighth of the length of the first stirring shaft 7 from left to right, and the second spiral stirring paddle 12 is located at seven-eighths of the length of the first stirring shaft 7 from left to right; the spiral blades of the first spiral stirring paddle 11 and the second spiral stirring paddle 12 are distributed counterclockwise along the circumferential direction on the first stirring shaft 7; the number of spiral blades of the first spiral stirring paddle 11 and the second spiral stirring paddle 12 are both 3, and the interval angle between each spiral blade is 120°.

[0045] like Figure 2 As shown, in this embodiment, a third spiral stirring paddle 13 and a fourth spiral stirring paddle 14 are provided on the second stirring shaft 8. The third spiral stirring paddle 13 is located at one-eighth of the length of the second stirring shaft 8 from left to right, and the fourth spiral stirring paddle 14 is located at seven-eighths of the length of the second stirring shaft 8 from left to right; the spiral blades of the third spiral stirring paddle 13 and the fourth spiral stirring paddle 14 are distributed clockwise along the circumferential direction on the second stirring shaft 8; the number of spiral blades of the third spiral stirring paddle 13 and the fourth spiral stirring paddle 14 are both 3, and the interval angle between each spiral blade is 120°.

[0046] like Figure 2 As shown, a fifth spiral stirring paddle 15 is provided on the third stirring shaft 9, and the fifth spiral stirring paddle 15 is located in the middle of the third stirring shaft 9; the spiral blades of the fifth spiral stirring paddle 15 are distributed on the third stirring shaft 9 along the circumferential direction; the number of spiral blades of the fifth spiral stirring paddle 15 is 3, and the interval angle between each spiral blade is 120°.

[0047] In this embodiment, the positions of the first helical stirring paddle 11 , the second helical stirring paddle 12 , the third helical stirring paddle 13 , the fourth helical stirring paddle 14 and the fifth helical stirring paddle 15 on the stirring shaft can be adjusted according to actual production needs.

[0048] In this embodiment, a first motor 4 and a second motor 5 are further provided on the outside of the sealing cylinder 2; the output end of the first motor 4 is connected to the first stirring shaft 7 and the second stirring shaft 8 respectively through connecting gears; the connecting gears are twill transmission teeth and are located between the first stirring shaft 7 and the second stirring shaft 8.

[0049] In this embodiment, the output end of the second motor 5 is connected to the third stirring shaft 9 .

[0050] In this embodiment, when in use, the first motor 4 drives the twill transmission teeth to rotate, thereby driving the first stirring shaft 7 and the second stirring shaft 8 to rotate in the same direction at the same time. At the same time, the second motor 5 drives the third stirring shaft 9 to rotate. At this time, the three stirring shafts rotate simultaneously to form three high-speed vortices, and there is a stronger shear force at the intersection of the vortices. Moreover, multi-axis stirring and washing can allow the slurry to move in a turbulent form in the sealed cylinder 2. Therefore, under the joint action of five groups of spiral stirring paddles, the slurry in the sealed cylinder 2 is stirred, sheared, and crushed in all directions, making the slurry more uniform, the particles finer, and the impurities in the particles less. In particular, when the five groups of spiral stirring paddles drive the slurry in the sealed cylinder to produce opposite vortices, the mixing force is stronger, which can more effectively prevent the solid phase from depositing at the bottom, thereby better driving the solid-liquid mixing, and is more conducive to improving the slurry washing effect.

[0051] In this embodiment, a feed port 1 is provided above the sealing cylinder 2; a slurry retaining plate 10 is movably connected below the feed port 1 to seal the feed port 1. The retaining plate 10 is the same size as the feed port, and a sealing rubber ring is provided at the hopper mouth below the feed port 1 to ensure that the retaining plate 10 can effectively seal the feed port 1 and prevent slurry splashing. When feeding is required, the retaining plate 10 is tilted downward by 30°, which not only does not reduce the feed rate but also can prevent slurry splashing during feeding to a certain extent.

[0052] In this embodiment, a porous plate 16 is provided below the sealed cylinder 2; the porous plate 16 is located below the stirring mechanism; the porous plate 16 is provided with a plurality of holes, the aperture of the holes is smaller than the particle size of lithium carbonate, and the porous plate 16 is a ceramic plate.

[0053] In this embodiment, a discharge port 6 is provided below the sealing cylinder 2 , and the discharge port 6 is located between the porous plate 16 and the stirring mechanism.

[0054] In this embodiment, an air inlet is provided below the sealing cylinder 2 .

[0055] In this embodiment, a liquid outlet is provided at the bottom of the sealing cylinder 2 , and the liquid outlet is located below the porous plate 16 .

[0056] In this embodiment, the liquid outlet is connected to a three-way pipe, one end of the three-way pipe is connected to the air inlet, and the other end is connected to the liquid discharge pipe.

[0057] In this embodiment, an air compressor 17 is provided on the pipe between the three-way pipe and the air inlet.

[0058] In this embodiment, a first ball valve 18 is provided on the pipe between the liquid outlet and the three-way pipe; a second ball valve 19 is provided on the pipe between the three-way pipe and the air compressor 17; a third ball valve 20 is provided on the discharge pipe; and a fourth ball valve 21 is provided on the pipe between the air compressor 17 and the air inlet.

[0059] In this embodiment, the outside of the sealing cylinder 2 is covered with a jacket 3; the jacket 3 is composed of a heating layer and a heat-insulating layer from the inside to the outside. On the one hand, the heating layer can be used to heat the slurry in the sealing cylinder 2 to improve the stirring efficiency. On the other hand, the heat-insulating layer can also be used to prevent the operator from being scalded when contacting the sealing cylinder 2.

[0060] The horizontal three-shaft spiral pulp washing equipment in the above embodiment can be used to wash lithium carbonate slurry, including the following steps:

[0061] (1) Open the slurry retaining plate 10 and tilt it downward by 30 degrees. Add lithium carbonate slurry into the sealed cylinder 2 through the feed port 1. After the addition is completed, close the slurry retaining plate 10.

[0062] (2) Turn on the first motor 4 and the second motor 5, turn on the stirring mechanism, and use the stirring mechanism to wash the lithium carbonate slurry. Specifically, driven by the first motor 4 and the second motor 5, the spiral stirring paddles on the first stirring shaft 7, the second stirring shaft 8, and the third stirring shaft 9 rotate, forming three high-speed vortices in the sealed cylinder 2, and performing all-round stirring and shearing on the slurry, making the slurry more uniform, the particles smaller, and the impurities in the particles less. In this step, the slurry in the sealed cylinder 2 is also heated by the heating layer in the jacket 3.

[0063] (3) After the pulping is completed, the first motor 4 and the second motor 5 are turned off, and the heating is stopped. Then, the second ball valve 19 is closed, and the third ball valve 20 and the first ball valve 18 are opened, so that the liquid phase passes through the porous plate 16, the liquid outlet, the three-way pipe, and is discharged from the drainage pipe. During the liquid phase discharge process, the fourth ball valve 21 is opened and the air compressor 17 is turned on. Under the action of the air compressor 17, compressed air is pumped into the sealing cylinder 2 from the air inlet, thereby accelerating the discharge efficiency of the liquid phase.

[0064] (4) After the drainage is completed, the third ball valve 20 is closed and the second ball valve 19 is opened. Under the action of the air compressor 17, compressed air is pumped into the sealed cylinder 2 from the liquid outlet. When the compressed air passes through the porous plate, the solid phase can be peeled off from the ceramic plate and the air flow is broken. Then the discharge port is opened to release the material. At this point, the air compressor 17 stops running, all valves are closed, and the operation is completed.

[0065] In addition, the washing effect of conventional pulping equipment on lithium carbonate was also investigated. At the same time, the particle size and impurity content of lithium carbonate before and after pulping were tested. The results are shown in Tables 1 and 2.

[0066] Table 1 Particle size comparison table of lithium carbonate before and after washing

[0067]

[0068] Table 2 Comparison of impurity content in lithium carbonate before and after washing

[0069]

[0070] It can be seen from Table 1 and Table 2 that, compared with conventional pulping equipment, the horizontal three-shaft spiral pulping equipment of the present invention has a better pulping effect and can obtain lithium carbonate with smaller particle size and lower impurity content.

[0071] In addition, compared with single-axis or double-axis pulping equipment, the three stirring shafts used in the present invention are distributed in a triangular shape, which can form a triangular area. The crushing ability within this area is stronger. Moreover, compared with four-axis pulping equipment, the three stirring shafts used in the present invention are distributed in a triangular shape, which can make the overall equipment more coordinated and the aspect ratio will not be too large. At the same time, compared with the horizontal three-axis stirring in the same plane, the three stirring shafts used in the present invention are distributed in a triangular shape, so that the stirring force in the sealed cylinder will be more uniform and will not cause excessive local pressure in the sealed cylinder.

[0072] Compared with conventional pulping equipment, the horizontal three-axis spiral pulping equipment of the utility model utilizes three stirring shafts distributed in a triangle to stir, shear and crush the pulp in the sealed cylinder in all directions, which can effectively improve the stirring and mixing effect of the pulp and significantly improve the resource utilization rate. It has the advantages of simple structure, easy operation, good sealing effect, high stirring efficiency and good pulping effect. It is a new type of pulping equipment that can be widely used in the preparation of battery-grade lithium carbonate. It can obtain high-quality battery-grade lithium carbonate with suitable particle size and low impurity content. It has high use value and good application prospects.

[0073] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the spirit and technical solution of the present invention. Therefore, any simple modification, equivalent replacement, equivalent change and modification of the above embodiments made according to the technical essence of the present invention, which does not depart from the content of the technical solution of the present invention, still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A horizontal three-shaft spiral pulp washing equipment, characterized in that: The invention comprises a sealing cylinder (2), wherein a stirring mechanism is provided in the sealing cylinder (2), and the stirring mechanism comprises a first stirring shaft (7), a second stirring shaft (8), and a third stirring shaft (9); the first stirring shaft (7), the second stirring shaft (8), and the third stirring shaft (9) are arranged transversely in the sealing cylinder (2) in a triangular distribution; the first stirring shaft (7), the second stirring shaft (8), and the third stirring shaft (9) are all provided with spiral stirring paddles; a porous plate (16) is provided below the sealing cylinder (2); the porous plate (16) is located below the stirring mechanism; a plurality of holes are provided on the porous plate (16); the An air inlet is provided below the sealing cylinder (2); a liquid outlet is provided at the bottom of the sealing cylinder (2), and the liquid outlet is located below the porous plate (16); a three-way pipe is connected to the liquid outlet, and one end of the three-way pipe is connected to the air inlet; an air compressor (17) is provided on the pipe between the three-way pipe and the air inlet; a first ball valve (18) is provided on the pipe between the liquid outlet and the three-way pipe; a second ball valve (19) is provided on the pipe between the three-way pipe and the air compressor (17); and a fourth ball valve (21) is provided on the pipe between the air compressor (17) and the air inlet.

2. The horizontal three-shaft spiral pulp washing equipment according to claim 1, characterized in that: The first stirring shaft (7) and the second stirring shaft (8) are on the same horizontal plane, and the third stirring shaft (9) is located above the first stirring shaft (7) and the second stirring shaft (8), so that the first stirring shaft (7), the second stirring shaft (8), and the third stirring shaft (9) are distributed in a regular triangle; Alternatively, the first stirring shaft (7) and the second stirring shaft (8) are on the same horizontal plane, and the third stirring shaft (9) is located below the first stirring shaft (7) and the second stirring shaft (8), so that the first stirring shaft (7), the second stirring shaft (8), and the third stirring shaft (9) are distributed in an inverted triangle.

3. The horizontal three-shaft spiral pulp washing equipment according to claim 2, characterized in that: The ratio of the height of the horizontal plane where the first stirring shaft (7) and the second stirring shaft (8) are located to the height of the sealing cylinder (2) is 1 / 3 to 2 / 3; the ratio of the height of the third stirring shaft (9) to the height of the sealing cylinder (2) is 1 / 3 to 2 / 3.

4. The horizontal three-shaft spiral pulp washing equipment according to claim 2, characterized in that: When in use, the first stirring shaft (7) and the second stirring shaft (8) rotate in the same direction; A first spiral stirring paddle (11) and a second spiral stirring paddle (12) are provided on the first stirring shaft (7), the first spiral stirring paddle (11) is located at one eighth of the length of the first stirring shaft (7) from left to right, and the second spiral stirring paddle (12) is located at seven eighths of the length of the first stirring shaft (7) from left to right; the spiral blades of the first spiral stirring paddle (11) and the second spiral stirring paddle (12) are distributed counterclockwise along the circumferential direction on the first stirring shaft (7); the number of spiral blades of the first spiral stirring paddle (11) and the second spiral stirring paddle (12) are both three, and the interval angle between each spiral blade is 120°; The second stirring shaft (8) is provided with a third helical stirring paddle (13) and a fourth helical stirring paddle (14), the third helical stirring paddle (13) being located at one eighth of the length of the second stirring shaft (8) from left to right, and the fourth helical stirring paddle (14) being located at seven eighths of the length of the second stirring shaft (8) from left to right; the helical blades of the third helical stirring paddle (13) and the fourth helical stirring paddle (14) are distributed in a clockwise direction along the circumferential direction on the second stirring shaft (8); the number of the helical blades of the third helical stirring paddle (13) and the fourth helical stirring paddle (14) are both three, and the interval angle between each helical blade is 120°; The third stirring shaft (9) is provided with a fifth helical stirring paddle (15), and the fifth helical stirring paddle (15) is located in the middle of the third stirring shaft (9); the helical blades of the fifth helical stirring paddle (15) are distributed on the third stirring shaft (9) along the circumferential direction; the number of the helical blades of the fifth helical stirring paddle (15) is 3, and the interval angle between each helical blade is 120°.

5. The horizontal three-shaft spiral pulp washing equipment according to claim 4, characterized in that: A first motor (4) and a second motor (5) are further provided on the outside of the sealing cylinder (2); the output end of the second motor (5) is connected to the third stirring shaft (9).

6. The horizontal three-shaft spiral pulp washing equipment according to any one of claims 1 to 5, characterized in that: A feed port (1) is also provided above the sealing cylinder (2); a slurry retaining plate (10) for sealing the feed port (1) is movably connected below the feed port (1); when feeding is required, the slurry retaining plate (10) is tilted downward by 30°; a sealing rubber ring is also provided on the bucket mouth below the feed port (1).

7. The horizontal three-shaft spiral pulp washing equipment according to any one of claims 1 to 5, characterized in that: The pores have a diameter smaller than the particle size of lithium carbonate; and the porous plate (16) is a ceramic plate.

8. The horizontal three-shaft spiral pulp washing equipment according to claim 7, characterized in that: A discharge port (6) is provided below the sealing cylinder (2), and the discharge port (6) is located between the porous plate (16) and the stirring mechanism.

9. The horizontal three-shaft spiral pulp washing equipment according to claim 7, characterized in that: The other end of the three-way pipe is connected to a drainage pipe; a third ball valve (20) is provided on the drainage pipe.

10. The horizontal three-shaft spiral pulp washing equipment according to any one of claims 1 to 5, characterized in that: The exterior of the sealing cylinder (2) is covered with a jacket (3); the jacket (3) comprises a heating layer and a heat insulation layer from the inside to the outside.

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