Duplex filter for lithium iron phosphate production

Abstract

The utility model relates to a duplex filter for lithium iron phosphate production, and belongs to the technical field of lithium iron phosphate production. The device mainly comprises a first feeding pipe, a first discharging pipe, a first filtering assembly, a flow dividing pipe, a second feeding pipe, a second discharging pipe, a second filtering assembly, a main feeding pipe, a main discharging pipe and a manual ball valve. According to the utility model, the first filtering assembly and the second filtering assembly can be switched for use without shutdown, and when one filtering assembly needs to be maintained, the other filtering assembly can continue to work, so that the whole filtering process cannot be interrupted, the continuity of the lithium iron phosphate filtering process is greatly ensured, and the working efficiency is improved. The arrangement of the manual ball valve facilitates the control of the flow direction of the slurry in the shunt pipe, the operation flexibility of the equipment is further improved, the duplex filter is simple in structure and easy to maintain and clean, the operation cost of an enterprise is reduced, impurities and particles in the lithium iron phosphate slurry are filtered and removed, the purity and electrochemical performance of a product are ensured, and the product quality is improved. And the product quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of lithium iron phosphate production technology, specifically relating to a dual filter for lithium iron phosphate production. Background Technology

[0002] Lithium iron phosphate (LFP) is a primary raw material for manufacturing cathode materials in lithium-ion batteries and is widely used in electric vehicles, electric bicycles, and energy storage. The preparation of LFP slurry is a crucial step in lithium-ion battery production. During the preparation process, a large number of impurities and particles may be introduced into the LFP slurry, affecting the purity and electrochemical performance of the product. Filtration is necessary to separate these impurities and particles from the bulk material, thereby ensuring product quality.

[0003] Existing lithium iron phosphate slurry filtration equipment requires frequent cleaning or replacement of the filter element to ensure normal operation. Otherwise, the filter element will become clogged and the output will be slow. However, the filter element disassembly process is time-consuming and labor-intensive, and cleaning cannot be performed during operation, requiring machine shutdown. This will cause significant economic losses to enterprises. Therefore, a dual filter for lithium iron phosphate production is proposed to solve the above problems. Utility Model Content

[0004] To overcome the problems of existing lithium iron phosphate slurry filtration equipment, such as the time-consuming and labor-intensive filter element disassembly process and the inability to clean during operation, which necessitates shutdown and causes significant economic losses for enterprises, this utility model provides a dual-stage filter for lithium iron phosphate production. This utility model allows switching between the first and second filter components without shutting down the system, greatly ensuring the continuity of the lithium iron phosphate filtration process. The manual ball valve facilitates control of the slurry flow direction in the diversion pipe, further improving the operational flexibility of the equipment. By filtering and removing impurities and particles from the lithium iron phosphate slurry, it ensures the purity and electrochemical performance of the product, thereby improving product quality.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A dual filter for lithium iron phosphate production mainly includes a first feed pipe, a first discharge pipe, a first filter assembly, a diversion pipe, a second feed pipe, a second discharge pipe, a second filter assembly, a main feed pipe, a main discharge pipe, and a manual ball valve. The first feed pipe and the first discharge pipe are installed on the first filter assembly. The diversion pipe is connected to the first filter assembly through the first feed pipe and the first discharge pipe. The second feed pipe and the second discharge pipe are installed on the diversion pipe. The second filter assembly is connected to the diversion pipe through the second feed pipe and the second discharge pipe. The main feed pipe and the main discharge pipe are installed on the diversion pipe. The first filter assembly and the second filter assembly are connected to the diversion pipe. The diversion pipe has a hollow internal structure, and sealing caps are provided at the bottom and top. The manual ball valve is installed inside the diversion pipe through the sealing cap at the top.

[0006] The first filter assembly includes a first mounting base, a first filter housing, a first connecting flange, a first top cover, a first hook, a first filter basket, and a first filter element. The first filter housing is mounted on the top of the first mounting base, the first connecting flange is mounted on the top of the first filter housing, the first top cover is detachably connected to the first connecting flange by fastening bolts, the first hook is mounted on the bottom of the first top cover, the first filter basket is mounted on the bottom of the first top cover by the first hook and is located inside the first filter housing, the first filter basket has a first round hole to facilitate the entry of slurry, and the first filter element is installed inside the first filter basket.

[0007] The second filter assembly includes a second mounting base, a second filter housing, a second connecting flange, a second top cover, a second hook, a second filter basket, and a second filter element. The second filter housing is mounted on the top of the second mounting base, the second connecting flange is mounted on the top of the second filter housing, the second top cover is detachably connected to the second connecting flange by fastening bolts, the second hook is mounted on the bottom of the second top cover, and the second filter basket is mounted on the bottom of the second top cover by the second hook, located inside the second filter housing. The second filter basket has a second round hole to facilitate the entry of slurry, and the second filter element is installed inside the second filter basket.

[0008] The first and second filter elements are made of polytetrafluoroethylene material with a filtration accuracy of 0.1~3μm.

[0009] A sealing ring is provided at the connection between the first connecting flange and the first top cover, and at the connection between the second connecting flange and the second top cover.

[0010] Both the first and second top covers are equipped with vent valves.

[0011] The main feed pipe and the main discharge pipe are respectively welded with feed flange and discharge flange.

[0012] The beneficial effects of this utility model are:

[0013] This invention allows for switching between the first and second filter components without shutting down the system. When one filter component requires maintenance, the other can continue operating, preventing interruption of the entire filtration process and greatly ensuring the continuity of the lithium iron phosphate filtration process. The manual ball valve facilitates control of the slurry flow direction in the diversion pipe, further improving the operational flexibility of the equipment. This dual-filter has a simple structure, is easy to maintain and clean, reducing the operating costs of enterprises. By filtering and removing impurities and particles from the lithium iron phosphate slurry, it ensures the purity and electrochemical performance of the product, thereby improving product quality. Attached Figure Description

[0014] Figure 1 This is an isometric schematic diagram of the present invention.

[0015] Figure 2 This is a three-dimensional schematic diagram of the present invention.

[0016] Figure 3 This is another three-dimensional schematic diagram of this utility model.

[0017] Figure 4 This is a partial cross-sectional view of the present invention.

[0018] Figure 5 This is a partial cross-sectional schematic diagram of the first and second filter baskets.

[0019] Figure 6 This is a partial cross-sectional diagram of a manual ball valve.

[0020] Figure 7 This is another partial cross-sectional diagram of a manual ball valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0022] This utility model discloses a dual filter for lithium iron phosphate production. The dual filter mainly includes a first inlet pipe 1, a first outlet pipe 2, a first filter assembly 3, a diversion pipe 4, a second inlet pipe 5, a second outlet pipe 6, a second filter assembly 7, a main inlet pipe 8, a main outlet pipe 9, and a manual ball valve 10. The first inlet pipe 1 and the first outlet pipe 2 are installed on the first filter assembly 3. The diversion pipe 4 is connected to the first filter assembly 3 through the first inlet pipe 1 and the first outlet pipe 2. The second inlet pipe 5 and the second outlet pipe 6 are installed on the diversion pipe 4. The second filter assembly 7 is connected to the diversion pipe 4 through the second inlet pipe 5 and the second outlet pipe 6. The main inlet pipe 8 and the main outlet pipe 9 are installed on the diversion pipe 4. The first filter assembly 3 and the second filter assembly 7 are connected to the diversion pipe 4. The diversion pipe 4 has a hollow internal structure, and a sealing cap 41 is provided at the bottom and top. The manual ball valve 10 is installed inside the diversion pipe 4 through the sealing cap 41 at the top.

[0023] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the first filter assembly 3 includes a first mounting base 31, a first filter housing 32, a first connecting flange 33, a first top cover 34, a first hook 35, a first filter basket 36, and a first filter element 37. The first filter housing 32 is mounted on the top of the first mounting base 31, the first connecting flange 33 is mounted on the top of the first filter housing 32, the first top cover 34 is detachably connected to the first connecting flange 33 by fastening bolts, the first hook 35 is mounted on the bottom of the first top cover 34, and the first filter basket 36 is mounted on the bottom of the first top cover 34 via the first hook 35, located inside the first filter housing 32. The first filter basket 36 has openings for easy access... The slurry enters through the first circular hole 361, and the first filter element 37 is installed inside the first filter basket 36. The slurry enters the first filter housing 32 through the first feed pipe 1. The first filter housing 32 is installed on the top of the first mounting base 31 and serves to accommodate and fix other components. The slurry entering the first filter housing 32 will first approach the first filter basket 36. The first filter basket 36 has a first circular hole 361 to facilitate the entry of the slurry. The first filter element 37 located inside the first filter basket 36 will filter the slurry. Impurities and particles are intercepted by the first filter element 37, and the pure slurry after filtration can flow out of the first filter assembly 3 through the first discharge pipe 2.

[0024] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the second filter assembly 7 includes a second mounting base 71, a second filter housing 72, a second connecting flange 73, a second top cover 74, a second hook 75, a second filter basket 76, and a second filter element 77. The second filter housing 72 is mounted on the top of the second mounting base 71, the second connecting flange 73 is mounted on the top of the second filter housing 72, the second top cover 74 is detachably connected to the second connecting flange 73 by fastening bolts, the second hook 75 is mounted on the bottom of the second top cover 74, and the second filter basket 76 is mounted on the bottom of the second top cover 74 by the second hook 75, located inside the second filter housing 72. The second filter basket 76 has openings for easy access... The slurry enters through the second circular hole 761, and the second filter element 77 is installed inside the second filter basket 76. The slurry enters the second filter housing 72 through the second feed pipe 5. The second filter housing 72 is installed on the top of the second mounting base 71 and serves to accommodate and fix other components. The slurry entering the second filter housing 72 will first approach the second filter basket 76. The second filter basket 76 has a second circular hole 761 to facilitate the entry of the slurry. The second filter element 77 located inside the second filter basket 76 will filter the slurry. Impurities and particles are intercepted by the second filter element 77, and the pure slurry after filtration can flow out of the second filter assembly 7 through the second discharge pipe 6.

[0025] The first filter element 37 and the second filter element 77 are made of polytetrafluoroethylene (PTFE) material with a filtration accuracy of 0.1~3μm. PTFE has strong corrosion resistance, and its filtration accuracy of 0.1~3μm removes impurities from the slurry, ensuring production quality.

[0026] like Figure 4 , Figure 5 As shown, sealing rings 11 are provided at the connection between the first connecting flange 33 and the first top cover 34, and at the connection between the second connecting flange 73 and the second top cover 74, to prevent slurry leakage.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, both the first top cover 34 and the second top cover 74 are equipped with vent valves 12; during the filtration process, if gas is mixed into the slurry, it can be discharged through the vent valves 12 to avoid gas interference with the filtration process.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 7 As shown, the main feed pipe 8 and the main discharge pipe 9 are respectively welded with a feed flange 81 and a discharge flange 91; these can be used for connection with other equipment.

[0029] Work process:

[0030] The lithium iron phosphate slurry to be filtered enters the diversion pipe 4 through the main feed pipe 8. The feed flange 81 on the main feed pipe 8 can be used to connect with other equipment. The slurry in the diversion pipe 4 can be selected to enter the first filter assembly 3 or the second filter assembly 7 by the control of the manual ball valve 10.

[0031] If the slurry enters the first filter housing 32 through the first feed pipe 1, it first passes through the first round hole 361 on the first filter basket 36, and then the slurry undergoes fine filtration through the first filter element 37. Tiny particles of 0.1~3μm are intercepted, and the pure slurry flows through the first discharge pipe 2 into the diversion pipe 4, and then is discharged through the main discharge pipe 9. When the first filter element 37 of the first filter assembly 3 needs to be cleaned or replaced, the manual ball valve 10 is turned to switch the slurry to the second filter assembly 7 for filtration. The filtered slurry flows out from the second discharge pipe 6 and is finally discharged through the main discharge pipe 9. At this time, the first top cover 34 can be removed, and the first filter basket 36 and the first filter element 37 can be taken out from the inside of the first filter housing 32 for cleaning or replacement without affecting the continuous production. After cleaning or replacement, the first top cover 34, the first filter basket 36, and the first filter element 37 are reinstalled, and the sealing ring 11 is ensured to be intact.

[0032] If the slurry enters the second filter housing 72 through the second feed pipe 5, it first passes through the second round hole 761 on the second filter basket 76, and then the slurry undergoes fine filtration through the second filter element 77. Tiny particles of 0.1~3μm are intercepted, and the pure slurry flows through the second discharge pipe 6 into the diversion pipe, and then is discharged through the main discharge pipe 9. When the second filter element 77 of the second filter assembly 7 needs to be cleaned or replaced, turn the manual ball valve 10 to switch the slurry to the first filter assembly 3 for filtration. The filtered slurry flows out from the first discharge pipe 2 and is finally discharged through the main discharge pipe 9. At this time, the second top cover 74 can be removed, and the second filter basket 76 and the second filter element 77 can be taken out from the second filter housing 72 for cleaning or replacement without affecting the continuous production. After cleaning or replacement, the second top cover 74, the second filter basket 76, and the second filter element 77 are reinstalled, and the sealing ring 11 is ensured to be intact.

[0033] During the filtration process, gas may accumulate in the first filter housing 32 and the second filter housing 72. This gas can be released through the vent valve 12 on the first top cover 34 and the second top cover 74, ensuring smooth filtration. Through the above working process, the device realizes the functions of continuous filtration, non-stop cleaning or replacement of filter elements, improves production efficiency, effectively removes impurities and particles from lithium iron phosphate slurry, ensures product quality, and reduces downtime and economic losses caused by filter element clogging.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A dual filter for lithium iron phosphate production, characterized in that: The aforementioned dual filter for lithium iron phosphate production includes a first inlet pipe (1), a first outlet pipe (2), a first filter assembly (3), a diverter pipe (4), a second inlet pipe (5), a second outlet pipe (6), a second filter assembly (7), a main inlet pipe (8), a main outlet pipe (9), and a manual ball valve (10). The first inlet pipe (1) and the first outlet pipe (2) are installed on the first filter assembly (3), and the diverter pipe (4) is connected to the first filter assembly (3) through the first inlet pipe (1) and the first outlet pipe (2). The feed pipe (5) and the second discharge pipe (6) are installed on the diversion pipe (4). The second filter assembly (7) is connected to the diversion pipe (4) through the second feed pipe (5) and the second discharge pipe (6). The main feed pipe (8) and the main discharge pipe (9) are installed on the diversion pipe (4). The first filter assembly (3) and the second filter assembly (7) are connected to the diversion pipe (4). The diversion pipe (4) has a hollow structure inside. The bottom and top ends are provided with sealing caps (41). The manual ball valve (10) passes through the sealing cap (41) at the top end and is installed inside the diversion pipe (4).

2. The dual filter for lithium iron phosphate production as described in claim 1, characterized in that: The first filter assembly (3) includes a first mounting base (31), a first filter housing (32), a first connecting flange (33), a first top cover (34), a first hook (35), a first filter basket (36), and a first filter element (37). The first filter housing (32) is mounted on the top of the first mounting base (31), the first connecting flange (33) is mounted on the top of the first filter housing (32), the first top cover (34) is detachably connected to the first connecting flange (33) by fastening bolts, the first hook (35) is mounted on the bottom of the first top cover (34), the first filter basket (36) is mounted on the bottom of the first top cover (34) by the first hook (35) and is located inside the first filter housing (32). The first filter basket (36) has a first round hole (361) for easy entry of slurry, and the first filter element (37) is installed inside the first filter basket (36).

3. A dual filter for lithium iron phosphate production as described in claim 2, characterized in that: The second filter assembly (7) includes a second mounting base (71), a second filter housing (72), a second connecting flange (73), a second top cover (74), a second hook (75), a second filter basket (76), and a second filter element (77). The second filter housing (72) is mounted on the top of the second mounting base (71), the second connecting flange (73) is mounted on the top of the second filter housing (72), the second top cover (74) is detachably connected to the second connecting flange (73) by fastening bolts, the second hook (75) is mounted on the bottom of the second top cover (74), the second filter basket (76) is mounted on the bottom of the second top cover (74) by the second hook (75) and is located inside the second filter housing (72). The second filter basket (76) has a second round hole (761) for easy entry of slurry, and the second filter element (77) is installed inside the second filter basket (76).

4. A dual filter for lithium iron phosphate production as described in claim 3, characterized in that: The first filter element (37) and the second filter element (77) are made of polytetrafluoroethylene material with a filtration accuracy of 0.1~3μm.

5. A dual filter for lithium iron phosphate production as described in claim 4, characterized in that: A sealing ring (11) is provided at the connection between the first connecting flange (33) and the first top cover (34), and at the connection between the second connecting flange (73) and the second top cover (74).

6. A dual filter for lithium iron phosphate production as described in claim 5, characterized in that: Both the first top cover (34) and the second top cover (74) are equipped with vent valves (12).

7. A dual filter for lithium iron phosphate production as described in claim 1 or 2, characterized in that: The main feed pipe (8) and the main discharge pipe (9) are respectively welded with feed flange (81) and discharge flange (91).

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