Slurrying and filtering device for preparing iron phosphate based on ammonium method

Abstract

The invention relates to a slurrying filtering device for preparing iron phosphate based on an ammonium method, which comprises a cylindrical filtering bin, a feeding pipe is arranged on one side of the upper end of the filtering bin, the feeding pipe extends along the radial direction of the filtering bin, a spherical filtering assembly with the diameter equal to that of the filtering bin is arranged in the filtering bin, and a plurality of filtering areas are arranged on the spherical filtering assembly. A discharging device is arranged on the side, away from the feeding pipe, outside the filtering bin, a blow-off pipe is arranged at the position, on the same side of the feeding pipe, of the lower end of the filtering bin, and the spherical filtering assembly can horizontally rotate. The feeding pipe is arranged on one side of the upper portion of the filtering assembly, the filtering area right opposite to the feeding pipe can be rotated to the other side through rotation during discharging, so that the filtering area right opposite to the feeding pipe is conveniently replaced, meanwhile, when iron phosphate on the filtering area needs to be discharged, the feeding pipe is closed, the rotating speed of the spherical filtering assembly is adjusted, and the filtering area can be conveniently replaced. And the discharging device is opened, so that the rapid discharging of the iron phosphate is realized.

Description

Technical Field

[0001] The present application relates to the technical field of iron phosphate preparation and filtration, and in particular to a slurry filtration device for preparing iron phosphate based on the ammonium process. Background Art

[0002] Iron phosphate is a key precursor material for lithium iron phosphate (LiFePO4) batteries. Lithium iron phosphate positive electrode materials have high safety, long cycle life and good thermal stability. They are widely used in electric vehicles, energy storage systems and small electronic devices. They have the advantages of high safety, low cost and environmental friendliness. At the same time, iron phosphate can be used as a catalyst for certain chemical reactions, such as in organic synthesis and oxidation reactions.

[0003] The existing preparation of iron phosphate generally adopts the ammonium process, which mixes ferrous sulfate solution and monoammonium phosphate solution, controls the reaction temperature and stirring speed, adds hydrogen peroxide for oxidation during the reaction, and reacts to generate iron phosphate precipitate. After the reaction, the iron phosphate precipitate is separated by filtration and washed with deionized water. It has the advantages of low cost and environmental protection. The by-product ammonium sulfate can be sold to further reduce costs. In addition, the iron phosphate product produced by this process has good stability and is suitable for battery positive electrode materials and other fields.

[0004] In the existing process of preparing iron phosphate, the iron phosphate precipitate needs to be filtered and slurried. During the filtration process, the slurried iron phosphate precipitate needs to be frequently discharged to prevent the iron phosphate precipitate from blocking the filter screen, thereby affecting the filtration efficiency. Summary of the invention

[0005] The present application provides a slurry filtration device for preparing iron phosphate based on the ammonium method, which can solve the problems of filtration blockage and poor efficiency of replacing the filter screen during the filtration process of the existing iron phosphate.

[0006] The technical solution of the present application is as follows: A slurry filtration device for preparing iron phosphate based on the ammonium process, comprising: A cylindrical filter bin is provided with a feed pipe on one side of the upper end of the filter bin, the feed pipe extends radially along the filter bin, a spherical filter assembly with a diameter equal to that of the filter bin is provided inside the filter bin, a plurality of filter areas are provided on the spherical filter assembly, a discharge device is provided on the side of the outside of the filter bin away from the feed pipe, a sewage pipe is provided on the lower end of the filter bin on the same side as the feed pipe, and the spherical filter assembly can rotate horizontally to rotate the filtered iron phosphate to the discharge device and discharge it outside the device.

[0007] By adopting the above scheme, a spherical horizontally rotatable filter assembly is set, and the feed pipe is set on the upper side of the filter assembly. When discharging, the filter area opposite to the feed pipe can be rotated to the other side, thereby conveniently replacing the filter area opposite to the feed pipe. At the same time, when it is necessary to discharge the iron phosphate on the filter area, the feed pipe is closed, the rotation speed of the spherical filter assembly is adjusted, and the discharge device is opened, thereby realizing the rapid discharge of iron phosphate.

[0008] In one embodiment of the present application, the spherical filter assembly includes a fixed ring, which is horizontally arranged and has a plurality of annularly distributed arc ribs arranged above it. The plurality of arc ribs enclose a hemispherical frame, one end of the arc rib is fixedly assembled on the fixed ring, and the other end is fixedly connected to a fixed block. A spherical filter net is embedded in the inner wall of the fixed ring, and the filter area is formed between two adjacent arc ribs.

[0009] By adopting the above scheme, arc ribs and a spherical filter net are set to form a spherical filter assembly, and the position of the filter area relative to the feed pipe is changed by rotation, which facilitates the change and adjustment of the filter position and improves the convenience of replacing the filter area.

[0010] In one embodiment of the present application, the spherical filter assembly further includes a reinforcement frame, and the reinforcement frame includes: Two connecting rings, the two connecting rings are respectively fixedly assembled on the inner wall of the spherical filter, and the diameter of the connecting ring is smaller than the diameter of the spherical filter; The inclined connecting rods are provided in plurality and are cross-arranged between the two connecting rings, and the two ends of the inclined connecting rods are respectively connected and fixed to the two connecting rings.

[0011] By adopting the above solution and providing the inclined connecting rod and the connecting ring, the structural strength of the spherical filter assembly is improved, thereby reducing the possibility of deformation of the spherical filter assembly during rotation.

[0012] In one embodiment of the present application, a motor assembly is also included, and the motor assembly includes: The motor is fixedly assembled on the upper end of the filter bin through a fixing frame, the driving shaft of the motor extends downward and passes through the filter bin, a telescopic member is arranged at the lower end of the driving shaft of the motor, and one end of the telescopic member is connected and fixed to the fixing block.

[0013] By adopting the above scheme, by setting a motor and controlling the power of the motor, the rotation speed of the spherical filter assembly can be regulated, and then the position of the filter area can be adjusted or the output power of the motor can be increased to increase the rotation speed, so as to utilize centrifugal force to discharge the unfiltered iron phosphate.

[0014] In one embodiment of the present application, the telescopic member comprises: A fixed tube, one end of which is coaxially connected and fixed to the driving shaft of the motor; A telescopic rod, one end of which extends into the interior of the fixed tube and is slidably connected to the fixed tube, and the other end of which is connected and fixed to the fixed block.

[0015] By adopting the above solution and arranging a telescopic rod at the driving shaft of the motor, the spherical filter assembly can undergo vertical telescopic displacement when rotating, and the motor will not be damaged when the driving shaft of the motor is subjected to axial force.

[0016] In one embodiment of the present application, the discharge device comprises: An arc block, a notch is provided on the outer wall of the filter bin away from the feed pipe, the notch is located above the fixing ring, the arc block is provided at the notch, a connecting plate is fixedly connected to one side of the arc block, an electric push rod is provided on the outer wall of the filter bin, and the driving shaft of the electric push rod is connected and fixed to the connecting plate; An inclined guide surface is provided on the other side of the arc block, and a material collecting bucket is provided on one side of the filter bin below the arc block.

[0017] By adopting the above scheme, a gap is opened on the outside of the filter bin, so that when discharging iron phosphate, the arc block is away from the filter bin by opening the gap, and the iron phosphate is automatically thrown out of the filter bin under the action of centrifugal force, and then enters the aggregate barrel.

[0018] In one embodiment of the present application, a supporting buffer is further included, and the supporting buffer includes: A support block body, wherein a plurality of spherical cavities are arranged at intervals in an annular shape; The ball is arranged inside the spherical cavity, and part of the ball protrudes outside the spherical cavity. A gap is provided between the inner wall of the spherical cavity and the ball, and a buffer is provided in the gap.

[0019] By adopting the above scheme, using the ball and the support block body, when the spherical filter assembly rotates, the ball can support the spherical filter assembly. At the same time, when subjected to axial downward force, it can play a buffering role by squeezing the buffer, thereby protecting the motor and allowing the spherical filter assembly to float up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a formal cross-sectional view of a slurry filtration device for preparing iron phosphate based on the ammonium process provided in an embodiment of the present application; Figure 2This is a front view of a spherical filter component of a slurry filtration device for preparing iron phosphate based on the ammonium process provided in an embodiment of the present application; Figure 3 This is a front view of a reinforced skeleton of a slurry filtration device for preparing iron phosphate based on the ammonium method provided in an embodiment of the present application; Figure 4 This is a front view of a discharging device of a slurry filtration device for preparing iron phosphate based on the ammonium process provided in an embodiment of the present application; Figure 5 This is a front view of a supporting buffer component of a slurry filtration device for preparing iron phosphate based on the ammonium method provided in an embodiment of the present application.

[0021] Explanation of the reference numerals: 1. Filter bin; 11. Feed pipe; 12. Spherical filter assembly; 121. Filter area; 1211. Fixed ring; 1212. Arc rib; 1213. Fixed block; 1214. Spherical filter net; 1215. Reinforcement frame; 1216. Connecting ring; 1217. Inclined connecting rod; 13. Discharge device; 131. Arc block; 132. Notch; 133. Guide surface; 134. Connecting plate; 135. Electric push rod; 136. Collecting barrel; 14. Drain pipe; 2. Motor assembly; 21. Motor; 22. Fixed frame; 23. Telescopic member; 231. Fixed pipe; 232. Telescopic rod; 3. Support buffer member; 31. Support block body; 311. Spherical cavity; 32. Ball; 33. Buffer. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-5 The slurry filtration device for preparing iron phosphate based on the ammonium method provided in the present application is further described in detail.

[0023] A slurry filtration device for preparing iron phosphate based on the ammonium method provided in an embodiment of the present application comprises: a cylindrical filter bin 1, a feed pipe 11 is provided on one side of the upper end of the filter bin 1, the feed pipe 11 extends radially along the filter bin 1, a spherical filter assembly 12 with a diameter equal to that of the filter bin 1 is provided inside the filter bin 1, a plurality of filter areas 121 are provided on the spherical filter assembly 12, a discharge device 13 is provided on the outside of the filter bin 1 away from the feed pipe 11, a sewage pipe 14 is provided on the lower end of the filter bin 1 on the same side of the feed pipe 11, and the spherical filter assembly 12 can rotate horizontally to rotate the filtered iron phosphate to the discharge device 13 and discharge it outside the device.

[0024] The spherical filter assembly 12 includes a fixed ring 1211, which is horizontally arranged and has a plurality of annularly distributed arc ribs 1212 arranged above it. The plurality of arc ribs 1212 enclose a hemispherical frame. One end of the arc rib 1212 is fixedly assembled on the fixed ring 1211, and the other end is fixedly connected to a fixed block 1213. A spherical filter net 1214 is embedded in the inner wall of the fixed ring 1211, and the filter area 121 is formed between two adjacent arc ribs 1212.

[0025] The spherical filter assembly 12 further includes a reinforcement frame 1215, and the reinforcement frame 1215 includes: Two connecting rings 1216, the two connecting rings 1216 are respectively fixedly assembled on the inner wall of the spherical filter 1214, and the diameter of the connecting rings 1216 is smaller than the diameter of the spherical filter 1214; The inclined connecting rods 1217 are provided in plurality and are cross-arranged between the two connecting rings 1216 , and both ends of the inclined connecting rods 1217 are respectively connected and fixed to the two connecting rings 1216 .

[0026] It also includes a motor 21 component 2, which includes: a motor 21, which is fixedly assembled on the upper end of the filter bin 1 through a fixing frame 22, and the driving shaft of the motor 21 extends downward and passes through the filter bin 1. A telescopic member 23 is provided at the lower end of the driving shaft of the motor 21, and one end of the telescopic member 23 is connected and fixed to the fixing block 1213.

[0027] The telescopic member 23 includes: a fixed tube 231 and a telescopic rod 232, one end of the fixed tube 231 is coaxially connected and fixed to the driving shaft of the motor 21, one end of the telescopic rod 232 extends into the fixed tube 231 and is slidably connected to the fixed tube 231, and the other end is connected and fixed to the fixed block 1213.

[0028] The discharge device 13 comprises: an arc block 131, a notch 132 is provided on the outer wall of the filter bin 1 at a side away from the feed pipe 11, the notch 132 is located above the fixing ring 1211, an arc block 131 is provided at the notch 132, a connecting plate 134 is fixedly connected to one side of the arc block 131, an electric push rod 135 is provided on the outer wall of the filter bin 1, and a driving shaft of the electric push rod 135 is connected and fixed to the connecting plate 134; An inclined guide surface 133 is provided on the other side of the arc block 131 , and a material collecting bucket 136 is provided below the arc block 131 on one side of the filter bin 1 .

[0029] It also includes a supporting buffer 3, which includes: a supporting block body 31 and a ball 32. The supporting block body 31 is provided with a plurality of spherical cavities 311 distributed in an annular pattern. The ball 32 is arranged inside the spherical cavity 311, and part of it protrudes outside the spherical cavity 311. A gap is provided between the inner wall of the spherical cavity 311 and the ball 32, and a buffer 33 is provided in the gap.

[0030] In summary, when iron phosphate is needed for filtering and the filtering effect is poor due to the congestion of iron phosphate, the motor 21 is turned on, the motor 21 drives the telescopic member 23 to rotate, and the telescopic member 23 drives the spherical filter assembly 12 to rotate, so that the filtering area 121 blocked by iron phosphate rotates, and the position of the filtering area 121 facing the feed pipe 11 is adjusted, so that the iron phosphate does not block the filter screen and affect the filtering effect; When it is necessary to discharge the filtered iron phosphate slurry, the rotation speed of the spherical filter assembly 12 is accelerated by adjusting the rotation of the motor 21, and the electric push rod 135 is used to push the slurry arc block 131 out of the filter bin 1. The iron phosphate slurry on the spherical filter mesh 1214 is automatically thrown out when passing through the notch 132 under the action of centrifugal force, and automatically falls into the collection barrel 136 under the guidance of the guide surface 133 of the arc block 131.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A slurry filtration device for preparing iron phosphate based on the ammonium process, characterized in that: include: A cylindrical filter bin (1) is provided with a feed pipe (11) on one side of the upper end of the filter bin (1), the feed pipe (11) extending in the radial direction of the filter bin (1), a spherical filter assembly (12) having a diameter equal to that of the filter bin (1) is provided inside the filter bin (1), a plurality of filter areas (121) are provided on the spherical filter assembly (12), a discharge device (13) is provided on the side of the outside of the filter bin (1) away from the feed pipe (11), a sewage discharge pipe (14) is provided on the lower end of the filter bin (1) on the same side as the feed pipe (11), and the spherical filter assembly (12) can rotate horizontally to rotate the filtered iron phosphate to the discharge device (13) and discharge it outside the device.

2. A slurry filtration device for preparing iron phosphate based on the ammonium process according to claim 1, characterized in that: The spherical filter assembly (12) comprises a fixing ring (1211), the fixing ring (1211) is arranged horizontally, and a plurality of annularly distributed arc ribs (1212) are arranged above the fixing ring, and the plurality of arc ribs (1212) enclose a frame having a hemispherical shape, one end of the arc rib (1212) is fixedly mounted on the fixing ring (1211), and the other end is fixedly connected to a fixing block (1213), a spherical filter net (1214) is embedded in the inner wall of the fixing ring (1211), and the filtering area (1211) is formed between two adjacent arc ribs (1212).

3. A slurry filtration device for preparing ferric phosphate based on the ammonium process according to claim 2, characterized in that: The spherical filter assembly (12) further comprises a reinforcement frame (1215), wherein the reinforcement frame (1215) comprises: Two connecting rings (1216), the two connecting rings (1216) are respectively fixedly assembled on the inner wall of the spherical filter net (1214), and the diameter of the connecting ring (1216) is smaller than the diameter of the spherical filter net (1214); A plurality of inclined connecting rods (1217) are provided and are cross-arranged between the two connecting rings (1216), and both ends of the inclined connecting rods (1217) are respectively connected and fixed to the two connecting rings (1216).

4. A slurry filtration device for preparing ferric phosphate based on the ammonium process according to claim 3, characterized in that: It also includes a motor (21) component (2), wherein the motor (21) component (2) includes: A motor (21), wherein the motor (21) is fixedly assembled on the upper end of the filter chamber (1) via a fixing frame (22), the driving shaft of the motor (21) extends downward and passes through the filter chamber (1), and a telescopic member (23) is provided at the lower end of the driving shaft of the motor (21), and one end of the telescopic member (23) is connected and fixed to the fixing block (1213).

5. A slurry filtration device for preparing ferric phosphate based on the ammonium process according to claim 4, characterized in that: The telescopic member (23) comprises: A fixed tube (231), one end of which is coaxially connected and fixed to a driving shaft of the motor (21); A telescopic rod (232), one end of which extends into the interior of the fixed tube (231) and is slidably connected to the fixed tube (231), and the other end of which is connected and fixed to the fixed block (1213).

6. A slurry filtration device for preparing ferric phosphate based on the ammonium process according to claim 5, characterized in that: The discharging device (13) comprises: An arc-shaped block (131), a notch (132) is provided on the outer wall of the filter bin (1) at a side away from the feed pipe (11), the notch (132) is located above the fixing ring (1211), an arc-shaped block (131) is provided at the notch (132), a connecting plate (134) is fixedly connected to one side of the arc-shaped block (131), an electric push rod (135) is provided on the outer wall of the filter bin (1), and a driving shaft of the electric push rod (135) is fixedly connected to the connecting plate (134); An inclined guide surface (133) is provided on the other side of the arc-shaped block (131), and a material collecting bucket (136) is provided on one side of the filter bin (1) below the arc-shaped block (131).

7. A slurry filtration device for preparing ferric phosphate based on the ammonium process according to claim 6, characterized in that: It also includes a supporting buffer member (3), wherein the supporting buffer member (3) includes: A support block body (31), wherein the support block body (31) is provided with a plurality of spherical cavities (311) distributed at intervals in an annular shape; A ball (32) is arranged inside the spherical cavity (311), and a portion of the ball (32) protrudes outside the spherical cavity (311). A gap is provided between the inner wall of the spherical cavity (311) and the ball (32), and a buffer (33) is provided in the gap.

Images