Lithium carbonate filtering device

Abstract

The utility model provides a lithium carbonate filtering device. The tank body is provided with a first mounting cavity, and a first liquid inlet and a first liquid outlet which are communicated with the first mounting cavity; the tray is mounted in the first mounting cavity; each filter element assembly comprises a filter element, a shell and a connecting structure, the shell is provided with a second mounting cavity, a second liquid inlet and a second liquid outlet, the second liquid inlet and the second liquid outlet are communicated with the second mounting cavity, the filter element is mounted in the second mounting cavity, and a gap is formed between the outer wall surface of the filter element and the inner wall surface of the shell; the connecting structure comprises an overflowing channel communicated with the second mounting cavity, one end of the connecting structure is detachably connected with the liquid outlet end of the shell, and the other end of the connecting structure is detachably connected with the tray; and the power pump is used for conveying the lithium carbonate solution into the first mounting cavity through the first liquid inlet. According to the lithium carbonate filtering device adopting the technical scheme, the production cost and the maintenance cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium carbonate filtration, and more specifically, to a lithium carbonate filtration device. Background Art

[0002] As a basic lithium salt product with stable properties, easy transportation, and easy storage, lithium carbonate is also a necessity for electronic materials, magnetic materials, optical materials, and the atomic energy industry, and its demand is increasing day by day. In the production process of lithium carbonate, solid-liquid separation operation needs to be carried out. Due to the unique crystallization and growth law of lithium carbonate, there are high requirements for the device for solid-liquid separation. The filter element of the existing lithium carbonate filter is generally an integral body. During long-term use, a filter cake may be formed at a certain part of the filter element. The filter cake is formed by the accumulation of residues after filtration or impurities in the solution. After the thickness of the filter cake reaches a certain level, it will affect the filtration effect. If the thickness of the filter cake is not large, the local part of the filter element can be flushed. If the thickness of the filter cake is large and it is difficult to flush it clean, in order to ensure the filtration effect, the entire filter element needs to be disassembled and replaced, resulting in high production costs and maintenance costs.

[0003] For example, Chinese Patent No. 202221912609.2 discloses a battery-grade lithium carbonate filtration device to avoid deposition, which includes a filtration tank. An installation plate is arranged in the filtration tank, and a filter element is installed at the bottom of the installation plate. The filter element of the above device is an integral body. After filtration, the entire filter element needs to be flushed. If the filter cake thickness at a certain part of the filter element is too large and it is difficult to clean, in order to ensure the filtration effect, the entire filter element needs to be replaced. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a lithium carbonate filtration device, which can reduce production costs and maintenance costs.

[0005] To achieve the above purpose, the utility model provides a lithium carbonate filtration device, including: a tank body, having a first installation cavity, a first liquid inlet and a first liquid outlet communicated with the first installation cavity; a tray, installed in the first installation cavity; a plurality of filter element assemblies, each filter element assembly including a filter element, a housing and a connection structure. The housing has a second installation cavity, a second liquid inlet and a second liquid outlet communicated with the second installation cavity. The filter element is installed in the second installation cavity, and there is a gap between the outer wall surface of the filter element and the inner wall surface of the housing. The connection structure includes a flow-through channel communicated with the second installation cavity. One end of the connection structure is detachably connected to the liquid outlet end of the housing, and the other end of the connection structure is detachably connected to the tray; and a power pump, used to transport the lithium carbonate solution into the first installation cavity through the first liquid inlet.

[0006] Furthermore, the connection structure further includes a first connecting pipe. One end of the first connecting pipe is detachably connected to the liquid outlet end of the housing, and the other end of the first connecting pipe is detachably connected to the tray.

[0007] Further, the connecting structure further includes a second connecting pipe. One end of the second connecting pipe is detachably connected to the end of the first connecting pipe away from the housing, and the other end of the second connecting pipe is detachably connected to the tray.

[0008] Further, the housing includes a threaded section. The first connecting pipe includes a first connecting section, a liquid passing section, and a second connecting section. The liquid passing section is located between the first connecting section and the second connecting section. The inner wall of the first connecting section is threadedly connected to the threaded section, and the inner wall of the second connecting section is threadedly connected to the end of the second connecting pipe facing the first connecting pipe.

[0009] Further, the second connecting pipe includes a third connecting section and a fourth connecting section. One end of the third connecting section is detachably connected to the end of the first connecting pipe away from the housing, the other end of the third connecting section is detachably connected to one end of the fourth connecting section, and the other end of the fourth connecting section is detachably connected to the tray.

[0010] Further, the lithium carbonate filtering device further includes a first seal. The first seal is sleeved on the fourth connecting section to seal the gap between the fourth connecting section and the third connecting section.

[0011] Further, the lithium carbonate filtering device further includes a second seal. The second seal is sleeved on the second connecting pipe to seal the gap between the first connecting pipe and the second connecting pipe.

[0012] Further, the filter element includes multiple layers of filter meshes arranged in sequence from the inside to the outside along the radial direction of the filter element. The aperture value range of the mesh holes of each filter mesh is 0.3 μm to 0.5 μm.

[0013] Further, the lithium carbonate filtering device further includes a plurality of locking members. A plurality of mounting holes are provided on the tray. The plurality of locking members are arranged in one-to-one correspondence with the plurality of filter element assemblies. The plurality of filter element assemblies are arranged in one-to-one correspondence with at least part of the mounting holes. One end of each connecting structure away from the housing is configured to pass through the mounting hole and be locked on the tray by the locking member.

[0014] Further, a slag discharge port is further provided at the bottom of the tank body. The slag discharge port is communicated with the first installation cavity.

[0015] Applying the technical solution of the present utility model, there are provided a tank body, a tray, a plurality of filter element assemblies and a power pump. Lithium carbonate solution enters the first installation cavity from the first liquid inlet through the power pump, and then enters the second installation cavity from the second liquid inlet. The lithium carbonate solution flowing into the second installation cavity flows through the filter element radially along the gap between the outer wall surface of the filter element and the inner wall surface of the housing. After being filtered by the filter element, the lithium carbonate solution forms a clear liquid, and then is discharged through the second liquid outlet and the flow channel in sequence, and finally discharged from the first liquid outlet of the tank body. The plurality of filter elements are independently arranged on the tray, and the plurality of filter elements jointly realize the filtration of the lithium carbonate solution. The filter element of each filter element assembly is installed in the second installation cavity of the housing, and the housing is detachably installed on the tray through a connection structure. If one or several filter elements are severely blocked, the corresponding filter element assembly with damaged filter elements can be individually detached from the tray, and then the filter element can be taken out from the second installation cavity for flushing or replacement, which can reduce the maintenance cost of the lithium carbonate filtering device and the production cost of lithium carbonate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 FIG. shows a schematic structural diagram of a lithium carbonate filtering device according to an embodiment of the present utility model;

[0018] Figure 2 FIG. shows a schematic structural diagram of a filter element assembly according to an embodiment of the present utility model;

[0019] Figure 3 FIG. shows an exploded view of a filter element assembly according to an embodiment of the present utility model;

[0020] Figure 4 FIG. shows a schematic structural diagram of a plurality of filter element assemblies installed on a tray according to an embodiment of the present utility model; and

[0021] Figure 5 FIG. shows a schematic structural diagram of a tray according to an embodiment of the present utility model.

[0022] Wherein, the above-mentioned accompanying drawings include the following reference numerals:

[0023] 10. Tank body; 11. First liquid inlet; 12. Slag discharge port; 13. Sealing cover; 20. Tray; 21. Mounting hole; 30. Filter element assembly; 31. Filter element; 32. Housing; 321. Second liquid inlet; 322. Second liquid outlet; 33. Connection structure; 331. First connecting pipe; 332. Second connecting pipe; 333. First connecting section; 334. Liquid passing section; 335. Second connecting section; 336. Third connecting section; 337. Fourth connecting section; 40. First sealing member; 50. Second sealing member. Detailed implementation manner

[0024] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] Combined with reference to Figures 1 to 5 As shown, the present invention provides a lithium carbonate filtering device, which includes: a tank body 10 having a first installation cavity, a first liquid inlet 11 and a first liquid outlet communicating with the first installation cavity; a tray 20 installed in the first installation cavity; a plurality of filter element assemblies 30, the filter element assembly 30 includes a filter element 31, a housing 32 and a connection structure 33, the housing 32 has a second installation cavity, a second liquid inlet 321 and a second liquid outlet 322 communicating with the second installation cavity, the filter element 31 is installed in the second installation cavity, there is a gap between the outer wall surface of the filter element 31 and the inner wall surface of the housing 32, the connection structure 33 includes a liquid passing channel communicating with the second installation cavity, one end of the connection structure 33 is detachably connected to the liquid outlet end of the housing 32, and the other end of the connection structure 33 is detachably connected to the tray 20; and a power pump for conveying the lithium carbonate solution through the first liquid inlet 11 to the first installation cavity.

[0026] In this embodiment, the lithium carbonate solution enters the first installation cavity from the first liquid inlet 11 through a power pump, and then enters the second installation cavity from the second liquid inlet 321. The lithium carbonate solution flowing into the second installation cavity flows radially through the filter element 31 along the gap between the outer wall surface of the filter element 31 and the inner wall surface of the outer shell 32. After being filtered by the filter element 31, the lithium carbonate solution forms a clear liquid, and then is discharged successively through the second liquid outlet 322 and the flow channel, and finally discharged from the first liquid outlet of the tank body 10. The number of the filter element assemblies 30 is multiple, and the multiple filter elements 31 are independently arranged on the tray 20. The multiple filter elements 31 jointly realize the filtration of the lithium carbonate solution. The filter element 31 of each filter element assembly 30 is installed in the second installation cavity, and the outer shell 32 is detachably installed on the tray 20 through the connecting structure 33. If one or several filter elements 31 are severely blocked, the corresponding filter element assembly 30 with the damaged filter element 31 can be separately removed from the tray 20. First, the connecting structure 33 is removed from the tray 20, the connecting structure 33 is removed from the outer shell 32, and then the filter element 31 is taken out from the second installation cavity for flushing or replacement, which can reduce the maintenance cost of the lithium carbonate filtering device and the production cost of lithium carbonate.

[0027] In one embodiment, the length of the outer shell 32 ranges from 1600 mm to 1700 mm, the length of the filter element 31 ranges from 1500 mm to 1600 mm, and the length of the filter element 31 is less than the length of the outer shell 32.

[0028] In one embodiment, the outer shell 32 is a circular tube, and a baffle plate with through holes is arranged at the bottom of the outer shell 32 to prevent the filter element 31 from falling out of the second installation cavity. The filter element 31 is a columnar structure, the diameter of the filter element 31 is less than the diameter of the outer shell 32, and the diameters of the second liquid inlet 321 and the second liquid outlet 322 of the outer shell 32 are the same, and the range of their diameters is 35 cm to 40 cm. The same diameters of the second liquid inlet 321 and the second liquid outlet 322 can avoid the formation of negative pressure, facilitate the passage of the lithium carbonate solution, and ensure the service life of the filter element 31 at the same time.

[0029] Referring to Figures 1 to 5 As shown in an embodiment of the present invention, the connecting structure 33 further includes a first connecting pipe 331. One end of the first connecting pipe 331 is detachably connected to the liquid outlet end of the outer shell 32, and the other end of the first connecting pipe 331 is detachably connected to the tray 20.

[0030] In this embodiment, the housing 32 is a tubular structure. One end of the first connecting pipe 331 is detachably connected to the housing 32, and the other end of the first connecting pipe 331 is detachably connected to the tray 20. That is, the filter element assembly 30 is a split structure. The parts connected to the tray 20 are the first connecting pipe 331 and the housing 32. Among them, the first connecting pipe 331 is directly connected to the tray 20, and the housing 32 is connected to the tray 20 through the first connecting pipe 331, which is an indirect connection. Since the filter element 31 is installed in the second installation cavity of the housing 32, the length after the first connecting pipe 331 is connected to the housing 32 is the total length of the filter element assembly 30. Through the above settings, on the one hand, the detachable connection between the housing 32 and the tray 20 can be achieved. On the other hand, for tubular structures of the same material and thickness, under the same pressure, the longer the length, the easier it is to bend and deform. And the filter element assembly 30 of the present application is composed of several detachable parts. In this way, when the air pressure in the tank 10 is too high, the filter element assembly 30 is not easily bent and damaged.

[0031] Referring to Figures 1 to 5 As shown, in an embodiment of the present invention, the connection structure 33 further includes a second connecting pipe 332. One end of the second connecting pipe 332 is detachably connected to the end of the first connecting pipe 331 away from the housing 32, and the other end of the second connecting pipe 332 is detachably connected to the tray 20.

[0032] In this embodiment, the housing 32 is a tubular structure, and the filter element assembly 30 is a split structure. The parts connected to the tray 20 are the first connecting pipe 331, the second connecting pipe 332, and the housing 32. Among them, the second connecting pipe 332 is directly connected to the tray 20, the first connecting pipe 331 is connected to the tray 20 through the second connecting pipe 332, which is an indirect connection, and the housing 32 is connected to the tray 20 through the connection structure 33, which is an indirect connection. Since the filter element 31 is installed in the second installation cavity of the housing 32, the length after the first connecting pipe 331, the second connecting pipe 332, and the housing 32 are connected is the total length of the filter element assembly 30. Through the above settings, on the one hand, the detachable connection between the housing 32 and the tray 20 can be achieved. On the other hand, for tubular structures of the same material and thickness, under the same pressure, the longer the length, the easier it is to bend and deform. And the filter element assembly 30 of the present application is composed of several detachable parts. In this way, when the air pressure in the tank 10 is too high, the filter element assembly 30 is not easily bent and damaged.

[0033] In an embodiment, the filter element 31 is made of polyethylene material, and the housing 32, the first connecting pipe 331, and the second connecting pipe 332 are all made of stainless steel material, which can reduce the adhesion and coalescence growth of lithium carbonate and ensure the service life of the filtering device.

[0034] Referring to Figures 1 to 5As shown, in one embodiment of the present utility model, the outer shell 32 includes a threaded section. The first connecting pipe 331 includes a first connecting section 333, a liquid passing section 334, and a second connecting section 335. The liquid passing section 334 is located between the first connecting section 333 and the second connecting section 335. The inner wall of the first connecting section 333 is threadedly connected to the threaded section, and the inner wall of the second connecting section 335 is threadedly connected to one end of the second connecting pipe 332 facing the first connecting pipe 331.

[0035] Through the above arrangement, the detachable connection between the first connecting pipe 331 and the outer shell 32 can be realized.

[0036] Combined with reference to Figures 1 to 5 As shown, in one embodiment of the present utility model, the second connecting pipe 332 includes a third connecting section 336 and a fourth connecting section 337. One end of the third connecting section 336 is detachably connected to one end of the first connecting pipe 331 away from the outer shell 32. The other end of the third connecting section 336 is detachably connected to one end of the fourth connecting section 337. The other end of the fourth connecting section 337 is detachably connected to the tray 20.

[0037] Through the above arrangement, the detachable connection between the first connecting pipe 331 and the second connecting pipe 332, and the detachable connection between the second connecting pipe 332 and the tray 20 can be realized.

[0038] Combined with reference to Figures 1 to 5 As shown, in one embodiment of the present utility model, the lithium carbonate filtering device further includes a first sealing member 40. The first sealing member 40 is sleeved on the fourth connecting section 337 to seal the gap between the fourth connecting section 337 and the third connecting section 336.

[0039] Through the above arrangement, the sealing of the gap at the connection position between the fourth connecting section 337 and the third connecting section 336 can be realized, preventing liquid leakage.

[0040] Combined with reference to Figures 1 to 5 As shown, in one embodiment of the present utility model, the lithium carbonate filtering device further includes a second sealing member 50. The second sealing member 50 is sleeved on the second connecting pipe 332 to seal the gap between the first connecting pipe 331 and the second connecting pipe 332.

[0041] Through the above arrangement, the sealing of the gap at the connection position between the first connecting pipe 331 and the second connecting pipe 332 can be realized, preventing liquid leakage.

[0042] Combined with reference to Figures 1 to 5 As shown, in one embodiment of the present utility model, the filter element 31 includes multiple filter meshes arranged in sequence from the inside to the outside along the radial direction of the filter element 31. The aperture of the mesh holes of each filter mesh ranges from 0.3 μm to 0.5 μm.

[0043] Through the above settings, the filtering effect of the filter element 31 on the lithium carbonate solution can be ensured, and the replacement cycle of the filter element 31 can be extended.

[0044] Referring to Figures 1 to 5 As shown, in an embodiment of the present utility model, the lithium carbonate filtering device further includes a plurality of locking members. A plurality of mounting holes 21 are provided on the tray 20. The plurality of locking members are arranged in one-to-one correspondence with the plurality of filter element assemblies 30. The plurality of filter element assemblies 30 are arranged in one-to-one correspondence with at least a part of the mounting holes 21. One end of each connecting structure 33 away from the outer shell 32 is configured to pass through the mounting hole 21 and is locked on the tray 20 through the locking member.

[0045] Through the above settings, the plurality of filter element assemblies 30 can be installed on the tray 20.

[0046] Referring to Figures 1 to 5 As shown, in an embodiment of the present utility model, a slag discharge port 12 is further provided at the bottom of the tank body 10. The slag discharge port 12 is communicated with the first installation cavity.

[0047] In this embodiment, a slag discharge port 12 is further provided at the bottom of the tank body 10. After the filtration is completed, the impurities on the filter element 31 are washed off by flushing and discharged through the slag discharge port 12.

[0048] In an embodiment, a sealing cover 13 is provided on the tank body 10 to seal the tank body 10.

[0049] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: The tank body, the tray, the plurality of filter element assemblies and the power pump are provided. The lithium carbonate solution enters the first installation cavity from the first liquid inlet through the power pump, and then enters the second installation cavity from the second liquid inlet. The lithium carbonate solution flowing into the second installation cavity flows through the filter element radially along the gap between the outer wall surface of the filter element and the inner wall surface of the outer shell. The lithium carbonate solution forms a clear liquid after being filtered by the filter element, and then is discharged through the second liquid outlet and the flow-through channel in sequence, and finally is discharged from the first liquid outlet of the tank body. The plurality of filter elements are independently arranged on the tray. The plurality of filter elements jointly realize the filtration of the lithium carbonate solution. The filter element of each filter element assembly is installed in the second installation cavity of the outer shell, and the outer shell is detachably installed on the tray through the connecting structure. If one or several filter elements are severely blocked, the corresponding filter element assembly with damaged filter element can be separately disassembled from the tray, and then the filter element can be taken out from the second installation cavity for flushing or replacement, which can reduce the maintenance cost of the lithium carbonate filtering device and the production cost of lithium carbonate.

[0050] Obviously, the embodiments described above are only some of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] The foregoing is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A lithium carbonate filtering device, characterized in that: include: A tank body (10) having a first installation cavity and a first liquid inlet (11) and a first liquid outlet communicated with the first installation cavity; A tray (20) installed in the first installation cavity; A plurality of filter element assemblies (30), wherein the filter element assemblies (30) comprise a filter element (31), a housing (32) and a connecting structure (33); the housing (32) comprises a second installation cavity and a second liquid inlet (321) and a second liquid outlet (322) communicated with the second installation cavity; the filter element (31) is installed in the second installation cavity; a gap is provided between the outer wall surface of the filter element (31) and the inner wall surface of the housing (32); the connecting structure (33) comprises a flow passage communicated with the second installation cavity; one end of the connecting structure (33) is detachably connected to the liquid outlet end of the housing (32); and the other end of the connecting structure (33) is detachably connected to the tray (20); as well as A power pump is used to transport the lithium carbonate solution into the first installation cavity through the first liquid inlet (11).

2. The lithium carbonate filtering device according to claim 1, characterized in that The connection structure (33) further comprises a first connection tube (331), one end of which is detachably connected to the liquid outlet end of the housing (32), and the other end of which is detachably connected to the tray (20).

3. The lithium carbonate filtering device according to claim 2, characterized in that, The connection structure (33) further comprises a second connection tube (332), one end of the second connection tube (332) being detachably connected to an end of the first connection tube (331) away from the housing (32), and the other end of the second connection tube (332) being detachably connected to the tray (20).

4. The lithium carbonate filtering device according to claim 3, characterized in that: The housing (32) comprises a threaded section, and the first connecting pipe (331) comprises a first connecting section (333), a liquid passing section (334) and a second connecting section (335), wherein the liquid passing section (334) is located between the first connecting section (333) and the second connecting section (335), an inner wall of the first connecting section (333) is threadedly connected to the threaded section, and an inner wall of the second connecting section (335) is threadedly connected to one end of the second connecting pipe (332) toward the first connecting pipe (331).

5. The lithium carbonate filtering device according to claim 3, characterized in that: The second connecting tube (332) includes a third connecting section (336) and a fourth connecting section (337), one end of the third connecting section (336) is detachably connected to an end of the first connecting tube (331) away from the outer shell (32), the other end of the third connecting section (336) is detachably connected to one end of the fourth connecting section (337), and the other end of the fourth connecting section (337) is detachably connected to the tray (20).

6. The lithium carbonate filtering device according to claim 5, characterized in that: The lithium carbonate filtering device further comprises a first sealing member (40), wherein the first sealing member (40) is sleeved on the fourth connecting segment (337) to seal a gap between the fourth connecting segment (337) and the third connecting segment (336).

7. The lithium carbonate filtering device according to claim 3, characterized in that: The lithium carbonate filtering device further comprises a second sealing member (50), wherein the second sealing member (50) is sleeved on the second connecting pipe (332) to seal the gap between the first connecting pipe (331) and the second connecting pipe (332).

8. The lithium carbonate filtering device according to any one of claims 1 to 7, characterized in that: The filter element (31) comprises multiple layers of filter screens arranged in sequence from the inside to the outside along the radial direction of the filter element (31), and the pore size of each filter screen is in the range of 0.3 μm to 0.5 μm.

9. The lithium carbonate filtering device according to any one of claims 1 to 7, characterized in that: The lithium carbonate filtering device also includes a plurality of locking members, a plurality of mounting holes (21) are provided on the tray (20), the plurality of locking members are arranged in one-to-one correspondence with the plurality of filter element assemblies (30), the plurality of filter element assemblies (30) are arranged in one-to-one correspondence with at least some of the mounting holes (21), and one end of each connecting structure (33) away from the housing (32) is constructed to pass through the mounting hole (21) and be locked on the tray (20) by the locking member.

10. The lithium carbonate filtering device according to any one of claims 1 to 7, characterized in that: The bottom of the tank body (10) is also provided with a slag discharge port (12), and the slag discharge port (12) is communicated with the first installation cavity.

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