Slurry washing and filtering device

Abstract

The utility model relates to a slurry washing and filtering device. The slurry washing and filtering device comprises a shell assembly, the top of the shell assembly is provided with a slurry input pipe and a detergent injection pipe, and the bottom of the shell assembly is provided with a discharge port; the filtering disc is of an inverted truncated conical structure, the outer periphery of the filtering disc is in sealed connection with the inner wall of the shell assembly, the inner periphery of the filtering disc surrounds a feeding port of the discharging port to form circumferential sealed connection, an annular cavity is defined by the filtering disc and the inner wall of the shell assembly, and a filtrate discharging pipe is arranged on the shell assembly; the mixing mechanism comprises a stirring rod assembly and a driving motor, and the upper end of the stirring rod assembly is in transmission connection with the driving motor. The top end of the slurry washing and filtering device is connected with the acid-containing slurry pipeline and the washing liquid pipeline, the filtrate outlet and the slurry outlet are formed in the bottom of the slurry washing and filtering device, the shell is fully mixed through the mixing mechanism, the functions of filtering and repeated washing are achieved according to the acidity detection equipment connected with the filtrate outlet until the acidity of slurry is qualified, continuous operation is achieved, and the production efficiency is improved. And the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of washing and filtration equipment, and specifically relates to a slurry washing and filtration device. Background Technology

[0002] Novel lithium electrolyte salts, such as LiFSI, are gradually becoming an important research direction in the field of lithium battery electrolytes due to their superior performance and broad application prospects. LiFSI exhibits far better physicochemical properties than LiPF6, making it the best alternative to improve the defects of LiPF6 and aligning with the development trend of electrolytes.

[0003] In the production process of the novel electrolyte lithium salt LiFSI, the crude salt slurry after dehydration contains various impurities and is highly corrosive. Subsequent equipment and pipelines require fluorine lining for corrosion protection, which is costly and unsafe. Therefore, the crude salt must be washed after dehydration to remove these impurities, ensuring optimal performance in subsequent processes. Currently, washing the crude salt slurry typically uses a rotary flat plate filter. However, because flat plate filters cannot continuously feed and discharge material, completing one batch of washing and filtration requires 18 disconnections and reconnections of the pipes, resulting in high labor costs and significantly reduced production efficiency. Furthermore, impurities can enter during these repeated disconnections and reconnections, affecting product quality. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a slurry washing and filtering device.

[0005] The technical solution of this utility model for a slurry washing and filtering device is as follows:

[0006] A slurry washing and filtering device, comprising:

[0007] The housing assembly has a slurry inlet pipe and a detergent injection pipe at the top, and a discharge port at the bottom;

[0008] The filter disc has an inverted truncated cone shape. Its outer periphery forms a sealed connection with the inner wall of the housing assembly, and its inner periphery forms a circumferential sealed connection around the feed port of the discharge port. The filter disc and the inner wall of the housing assembly form an annular cavity. The housing assembly is provided with a filtrate discharge pipe that communicates with the annular cavity.

[0009] The mixing mechanism includes a stirring rod assembly and a drive motor. The upper end of the stirring rod assembly is connected to the drive motor fixedly connected to the upper end of the housing assembly, and the lower end extends to the upper side of the filter disc.

[0010] Furthermore, the housing assembly includes an upper housing section, a cylindrical housing section, and a lower housing section. The cylindrical housing section and the lower housing section are detachably connected by a flange sealing assembly structure. The filter disc is coaxially disposed in the lower part of the inner cavity of the cylindrical housing section, and its outer periphery is provided with an outer annular sealing flange. The outer annular sealing flange is clamped and sealed with the flange sealing assembly structure.

[0011] Furthermore, the flange sealing assembly structure includes an upper flange and a lower flange. The upper flange is fixedly and sealingly connected to the lower end of the cylindrical shell section, and the lower flange is fixedly and sealingly connected to the upper end of the lower shell section. The upper and lower sides of the outer annular sealing flange are respectively provided with sealing gaskets that match the upper flange and the lower flange.

[0012] Furthermore, the filter disc has an inner annular sealing flange on its inner periphery, which is sealed and fixedly connected to the feed port of the discharge port, and a discharge pipe is sealed and fixedly connected to the discharge port of the discharge port.

[0013] Furthermore, the lower side of the filter disc is provided with several support plates that are fixedly connected to the lower housing section, and an acidity detection device is fixedly connected to the filtrate discharge pipe.

[0014] Furthermore, a semi-tube jacket is spirally wound on the outer wall of the cylindrical shell section, and the semi-tube jacket is provided with a heat exchange medium inlet and a heat exchange medium outlet.

[0015] Furthermore, the stirring rod assembly includes a rod body, an upper stirring impeller, and a lower stirring impeller. The upper stirring impeller includes an upper fixing ring and several upper stirring blades that are horizontally fixed to the upper fixing ring. The lower stirring impeller includes a lower fixing ring and several lower stirring blades that are inclined and fixed to the lower fixing ring. The lower stirring blades are arranged parallel to the filter disc.

[0016] Furthermore, the upper stirring blade includes a large blade and a small blade, the small blade is fixedly connected to the upper fixing ring, and the large blade is fixedly connected to one end of the small blade.

[0017] Furthermore, the lower stirring blade includes a large blade and a small blade, the small blade is fixedly connected to the lower fixing ring, the large blade is fixedly connected to one end of the small blade, and the large blade is covered with a polytetrafluoroethylene plate.

[0018] This utility model provides a slurry washing and filtering device, which has the following advantages compared with the prior art:

[0019] In use, the electric ball valves on the filtrate discharge pipe and the discharge pipe of this utility model are closed, while the electric ball valves on the slurry input pipe and the detergent injection pipe are open, allowing the washing liquid and acidic coarse salt slurry to enter the housing respectively. When the electric ball valve on the slurry input pipe is closed, the mixing mechanism operates to achieve thorough mixing and washing. When the electric ball valve on the filtrate discharge pipe is open, the washed acidic liquid is filtered out through the filter disc and flows out of the housing through the filtrate discharge pipe. The coarse salt particles remain inside the housing. Washing liquid is added multiple times for repeated washing and acid removal until the material becomes neutral. Once the acidity is detected as qualified by the acidity detection device on the filtrate discharge pipe, the electric ball valves on the detergent injection pipe and the filtrate discharge pipe are closed in conjunction with the electric ball valve on the discharge pipe, allowing the coarse salt slurry to directly enter the stainless steel centrifuge for subsequent processes.

[0020] The slurry washing and filtering device of this utility model is connected to an acidic slurry pipe and a washing liquid pipe at the top, and has a filtrate outlet and a slurry outlet at the bottom. The shell is fully mixed by a mixing mechanism. According to the acidity detection device connected to the filtrate outlet, the device realizes the functions of filtration and multiple washing until the acidity of the slurry is qualified, thus realizing continuous operation and improving production efficiency.

[0021] The upper shell section and the cylindrical shell section are integrally formed, and the cylindrical shell section and the lower shell section are connected by flanges, allowing for quick assembly and disassembly with bolt assemblies. This design facilitates internal cleaning, filter disc replacement, and troubleshooting, significantly reducing downtime. The filter discs are clamped and fixed by flanges, and a sealing gasket ensures a tight seal. Disassembly only requires loosening the bolts, simplifying the maintenance process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the slurry washing and filtering device of this utility model;

[0023] Figure 2 This is a schematic diagram of the lower shell section of the slurry washing and filtering device of this utility model;

[0024] Figure 3 This is a cross-sectional schematic diagram of the upper stirring blade in the slurry washing and filtering device of this utility model;

[0025] Figure 4 This is a cross-sectional schematic diagram of the lower stirring blade in the slurry washing and filtering device of this utility model;

[0026] In the diagram: 1. Upper shell section; 2. Cylindrical shell section; 3. Lower shell section; 4. Detergent injection pipe; 5. Slurry input pipe; 6. Motor mounting base; 7. Half-pipe jacket; 8. Baffle; 9. Filtrate discharge pipe; 10. Discharge port; 11. Discharge pipe; 12. Filter disc; 13. Support plate; 14. Annular chamber; 15. Outer annular sealing flange; 16. Sealing gasket; 17. Upper flange; 18. Lower flange; 19. Inner annular sealing flange; 20. Rod body; 21. Upper stirring impeller; 22. Lower stirring impeller; 23. Drive motor; 24. Upper fixing ring; 25. Small blade; 26. Large blade; 27. Lower fixing ring; 28. Polytetrafluoroethylene plate. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0028] Specific embodiments of the slurry washing and filtering device of this utility model are as follows: Figures 1 to 4 As shown, it includes a housing assembly, a filter disc 12, and a mixing mechanism.

[0029] The housing assembly includes an upper housing section 1, a cylindrical housing section 2, and a lower housing section 3. The cylindrical housing section 2 and the lower housing section 3 are detachably connected by a flange sealing assembly structure. In this embodiment, the upper housing section 1 and the cylindrical housing section 2 are an integral structure. The flange sealing assembly structure includes an upper flange 17 and a lower flange 18. The upper flange 17 is fixedly and sealed to the lower end of the cylindrical housing section, and the lower flange 18 is fixedly and sealed to the upper end of the lower housing section 3. The cylindrical housing section 2 and the lower housing section 3 are sealed and fixedly connected by a plurality of bolt assemblies passing between the upper flange 17 and the lower flange 18. A slurry input pipe 5 and a detergent injection pipe 4 are fixedly connected to the top of the upper housing section 1. A motor mounting base 6 is fixedly connected to the center of the top of the upper housing section 1. The slurry input pipe 5 and the detergent injection pipe 4 are symmetrically arranged on both sides of the motor mounting base 6. A discharge port 10 is located at the center of the bottom of the lower housing section 3. A discharge pipe 11 is fixedly and sealed to the discharge port of the discharge port 10. A semi-tube jacket 7 is spirally wound on the outer wall of the cylindrical shell section 2. The semi-tube jacket 7 is provided with a heat exchange medium inlet and a heat exchange medium outlet. Several vertically arranged baffles 8 are fixedly connected to the inner wall of the cylindrical shell section 2. In this embodiment, the baffles 8 are made of angle steel, and the baffles 8 are evenly spaced along the circumference of the cylindrical shell section 2.

[0030] The filter disc 12 has an inverted truncated conical structure and is coaxially located in the lower part of the inner cavity of the cylindrical shell section 2. The outer periphery of the filter disc 12 has a horizontally extending outer annular sealing flange 15. The outer annular sealing flange 15 is located between the upper flange 17 and the lower flange 18, and has several through holes corresponding one-to-one with the flange holes of the upper flange 17 and the lower flange 18. Several bolt assemblies pass through these through holes, clamping the outer annular sealing flange 15 between the upper flange 17 and the lower flange 18. To improve the sealing performance between the outer annular sealing flange 15 and the upper and lower flanges 17 and 18, sealing gaskets 16 matching the upper and lower flanges 17 and 18 are provided on the upper and lower sides of the outer annular sealing flange 15, respectively. The filter disc 12 and the inner wall of the lower shell section 3 form an annular chamber 14, and a filtrate discharge pipe 9 communicating with the annular chamber 14 is fixedly connected to the lower end of the shell section. The filter disc 12 has an inner annular sealing flange 19 on its inner periphery, which is sealed and fixedly connected to the feed port of the discharge port 10. Several support plates 13 are fixedly connected to the lower housing section 3 on the lower side of the filter disc 12, and an acidity detection device is fixedly connected to the filtrate discharge pipe 9.

[0031] The mixing mechanism includes a stirring rod assembly and a drive motor 23. The stirring rod assembly includes a rod body 20, an upper stirring impeller 21, and a lower stirring impeller 22. The upper end of the rod body 20 is rotatably mounted at the center of the upper housing section 1 via a bearing and extends upward into the motor mounting base 6. The drive motor 23 is fixedly connected to the upper side of the motor mounting base 6. The upper end of the rod body 20 is fixedly connected to the output shaft of the drive motor 23 via a coupling, and the lower end of the rod body 20 extends to near the discharge port 10. The upper stirring impeller 21 includes an upper fixing ring 24 and several upper stirring blades horizontally fixedly connected to the upper fixing ring 24. The lower stirring impeller 22 includes a lower fixing ring 27 and several lower stirring blades inclinedly fixedly connected to the lower fixing ring 27. The lower stirring blades are arranged parallel to the filter disc 12. The upper stirring blades include a large blade 26 and a small blade 25. The small blade 25 is fixedly connected to the upper fixing ring 24, and the large blade 26 is fixedly connected to one end of the small blade 25. The lower stirring blades include a large blade 26 and a small blade 25. The small blade 25 is fixedly connected to the lower fixing ring 27, and the large blade 26 is fixedly connected to one end of the small blade 25. The large blade 26 is covered with a polytetrafluoroethylene plate 28.

[0032] When using the slurry washing and filtering device of this utility model, the electric ball valves on the filtrate discharge pipe 9 and the discharge pipe 11 are closed, while the electric ball valves on the slurry input pipe 5 and the detergent injection pipe 4 are opened, allowing the washing liquid and acidic coarse salt slurry to enter the housing respectively. When the electric ball valve on the slurry input pipe 5 is closed, the mixing mechanism operates to achieve thorough mixing and washing. When the electric ball valve on the filtrate discharge pipe 9 is opened, the washed acidic liquid is filtered out through the filter disc 12 and flows out of the housing through the filtrate discharge pipe 9. The coarse salt particles remain inside the housing. Washing liquid is added multiple times, and the acid is repeatedly washed and removed until the material becomes neutral. After the acidity is detected as qualified by the acidity detection device on the filtrate discharge pipe 9, the electric ball valves on the detergent injection pipe 4 and the filtrate discharge pipe 9 are closed in conjunction with the electric ball valve on the discharge pipe 11, allowing the coarse salt slurry to directly enter the stainless steel centrifuge for subsequent processes.

[0033] The slurry washing and filtering device of this utility model is connected to an acidic slurry pipe and a washing liquid pipe at the top, and has a filtrate outlet and a slurry outlet at the bottom. The shell is fully mixed by a mixing mechanism. According to the acidity detection device connected to the filtrate outlet, the device realizes the functions of filtration and multiple washing until the acidity of the slurry is qualified, thus realizing continuous operation and improving production efficiency.

[0034] The upper shell section 1 and the cylindrical shell section 2 are integrally formed, and the cylindrical shell section 2 and the lower shell section 3 are connected by a flange and bolt assembly for quick assembly and disassembly. This design facilitates internal cleaning, filter disc 12 replacement, and troubleshooting, significantly reducing downtime. The filter disc 12 is clamped and fixed by the flange, and the sealing gasket 16 ensures a tight seal. Disassembly only requires loosening the bolts, simplifying the maintenance process.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A slurry washing and filtering device, characterized in that, include: The housing assembly has a slurry inlet pipe and a detergent injection pipe at the top, and a discharge port at the bottom; The filter disc has an inverted truncated conical structure. Its outer periphery forms a sealed connection with the inner wall of the housing assembly, and its inner periphery forms a circumferential sealed connection around the feed port of the discharge port. The filter disc and the inner wall of the housing assembly form an annular cavity. The housing assembly is provided with a filtrate discharge pipe that communicates with the annular cavity. The mixing mechanism includes a stirring rod assembly and a drive motor. The upper end of the stirring rod assembly is connected to the drive motor fixedly connected to the upper end of the housing assembly, and the lower end extends to the upper side of the filter disc.

2. The slurry washing and filtering device according to claim 1, characterized in that, The housing assembly includes an upper housing section, a cylindrical housing section, and a lower housing section. The cylindrical housing section and the lower housing section are detachably connected by a flange sealing assembly structure. The filter disc is coaxially disposed in the lower part of the inner cavity of the cylindrical housing section, and its outer periphery is provided with an outer annular sealing flange. The outer annular sealing flange is clamped and sealed with the flange sealing assembly structure.

3. The slurry washing and filtering device according to claim 2, characterized in that, The flange sealing assembly structure includes an upper flange and a lower flange. The upper flange is fixedly and sealed to the lower end of the cylindrical shell section, and the lower flange is fixedly and sealed to the upper end of the lower shell section. The upper and lower sides of the outer annular sealing flange are respectively provided with sealing gaskets that match the upper flange and the lower flange.

4. The slurry washing and filtering device according to claim 2, characterized in that, The filter disc has an inner annular sealing flange on its inner periphery. The inner annular sealing flange is sealed and fixedly connected to the feed port of the discharge port. A discharge pipe is sealed and fixedly connected to the discharge port of the discharge port.

5. The slurry washing and filtering device according to claim 2, characterized in that, The lower side of the filter disc is provided with several support plates that are fixedly connected to the lower housing section, and an acidity detection device is fixedly connected to the filtrate discharge pipe.

6. The slurry washing and filtering device according to claim 2, characterized in that, A semi-tube jacket is spirally wound on the outer wall of the cylindrical shell section, and the semi-tube jacket is provided with a heat exchange medium inlet and a heat exchange medium outlet.

7. The slurry washing and filtering device according to claim 1, characterized in that, The stirring rod assembly includes a rod body, an upper stirring impeller, and a lower stirring impeller. The upper stirring impeller includes an upper fixing ring and several upper stirring blades that are horizontally fixed to the upper fixing ring. The lower stirring impeller includes a lower fixing ring and several lower stirring blades that are inclined and fixed to the lower fixing ring. The lower stirring blades are arranged parallel to the filter disc.

8. The slurry washing and filtering apparatus according to claim 7, characterized in that, The upper stirring blade includes a large blade and a small blade. The small blade is fixedly connected to the upper fixing ring, and the large blade is fixedly connected to one end of the small blade.

9. The slurry washing and filtering device according to claim 7, characterized in that, The lower stirring blade includes a large blade and a small blade. The small blade is fixedly connected to the lower fixing ring, and the large blade is fixedly connected to one end of the small blade. The large blade is covered with a polytetrafluoroethylene plate.

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