A device and process for preparing high-purity lithium carbonate by recycling lithium carbonate lithium precipitation mother liquor

Abstract

The application discloses a kind of equipment and process for preparing high-purity lithium carbonate by lithium carbonate lithium precipitation mother liquor recovery, comprising: bottom table, the right side of the top surface of the bottom table is provided with crystallization component, the left side of the top surface of the bottom table is provided with tank body, valve pipe is arranged between the tank body and crystallization component;Tank cover, the tank cover is fixedly installed on the top surface of tank body;Motor, the motor is arranged on the top surface of tank cover;Round bar, the round bar is rotatably installed in the inside top end of tank cover, and the top end of the round bar is fixedly connected with the bottom surface of the rotating shaft of motor;Ring plate, the ring plate is fixed on the inner wall of tank body upper side;Pipe frame, the pipe frame is fixed on the top surface of ring plate, and the application filters large particle impurities in lithium carbonate lithium precipitation mother liquor in the process of rotating disc, so that the problem that large particle impurities in lithium carbonate lithium precipitation mother liquor can damage the surface of filter membrane and cause the poor effect of equipment recovery preparation high-purity lithium carbonate is avoided.

Description

Technical Field

[0001] This invention belongs to the field of lithium carbonate precipitation mother liquor recovery, specifically relating to an apparatus and process for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor. Background Technology

[0002] In the industrial production of lithium carbonate, the lithium carbonate precipitation mother liquor still contains incompletely precipitated lithium ions, with a concentration typically between 1-5 g / L or even higher. The equipment for recycling and preparing high-purity lithium carbonate mainly extracts the valuable lithium from the lithium carbonate precipitation mother liquor to the maximum extent possible, turning it into a qualified product and improving the overall recovery rate.

[0003] Patent CN211169876U discloses an apparatus for preparing battery-grade lithium carbonate using lithium carbonate precipitation mother liquor, relating to the field of lithium carbonate preparation technology. The apparatus includes a base plate, a support rod fixedly connected to one side of the top of the base plate, a heating device fixedly connected to the top of the support rod, an evaporation frame on the top of the heating device, an exhaust window on one side of the top of the evaporation frame, a connecting rod fixedly connected to the top of the outer surface of the evaporation frame, a filter frame fixedly connected to the top of the connecting rod, a filter screen inside the filter frame, a feed pipe at the top of the filter frame, and a transfer pipe at the bottom of the filter frame. This invention solves the problem of existing lithium carbonate preparation equipment generating lithium carbonate precipitation mother liquor during use. This mother liquor contains a certain amount of lithium carbonate, which cannot be directly discarded, resulting in insufficient utilization of raw materials and reduced lithium carbonate production conversion rate.

[0004] During the process of recovering and preparing high-purity lithium carbonate from lithium carbonate precipitation mother liquor, large particulate impurities in the mother liquor can damage the filter membrane surface, resulting in poor equipment performance in recovering and preparing high-purity lithium carbonate. At the same time, the lithium carbonate precipitation mother liquor accumulates at the bottom of the tank, leading to poor filtration of the mother liquor at the bottom of the tank, and a large amount of lithium carbonate adheres to the tank wall, resulting in poor equipment performance in purifying lithium carbonate. Summary of the Invention

[0005] The purpose of this invention is to provide a device for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor, so as to solve the problem that large particulate impurities in lithium carbonate precipitation mother liquor will damage the filter membrane surface, resulting in poor equipment recovery and preparation of high-purity lithium carbonate.

[0006] To achieve the above objectives, the present invention provides an apparatus for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor, comprising: a base platform, a crystallization component disposed on the right side of the top surface of the base platform, a tank disposed on the left side of the top surface of the base platform, and a valve pipe disposed between the tank and the crystallization component; A can lid, which is fixedly installed on the top surface of the can body; The motor is mounted on the top surface of the can lid; A round rod, which is installed through and rotatably inside the top of the can lid, and the top of the round rod is fixedly connected to the bottom surface of the motor shaft; A ring plate, which is fixed above the inner wall of the tank; The support tube is fixed to the top surface of the ring plate; A filter membrane is fixed above the inner wall of the annular plate, and the support tube passes through and is fixed in the middle of the filter membrane; The outer wall of the round rod makes rotatable contact with the inner wall of the support tube; A bending frame, which is fixed below the outer wall of the round rod; The mesh tray is fixed to the top surface of the curved frame, the outer wall of the mesh tray is in rotatable contact with the inner wall of the ring plate, and the inner wall of the mesh tray is rotatably connected to the outer wall of the frame tube. The screen is used to screen out large particulate impurities in the lithium carbonate precipitation mother liquor. The motor shaft drives the round rod to rotate forward. The round rod rotates forward in the tank cover and in the support tube. The round rod drives the bending frame to rotate forward, and the bending frame drives the screen to rotate forward. The lithium carbonate precipitation mother liquor rises in the tank. The filter membrane filters out the impurities in the lithium carbonate precipitation mother liquor. The screen filters out large particulate impurities in the lithium carbonate precipitation mother liquor during the rotation process.

[0007] In one or more embodiments of the present invention, the crystallization assembly includes: a crystallization tank, a tank cover, a circular shell, and a resistance heater. The crystallization tank is fixed to the right side of the top surface of the base platform, the tank cover is fixed to the top surface of the crystallization tank, the circular shell is fixed to the outer wall of the crystallization tank, and the resistance heater is disposed between the inner wall of the circular shell and the outer wall of the crystallization tank.

[0008] In one or more embodiments of the present invention, the bottom surface of the base is provided with four supporting feet, the bottom left side of the tank is provided with a feed inlet, the filter membrane is used to filter impurities in the lithium carbonate precipitation mother liquor, and the top surface of the mesh tray is provided with several reinforcing ribs.

[0009] In one or more embodiments of the present invention, the valve tube is located above the annular plate, the resistance heater is located below the valve tube, and the mesh disk is located below the filter membrane.

[0010] In one or more embodiments of the present invention, the outer wall of the bending frame is provided with an anti-deposition device, which is used to stir the lithium carbonate precipitation mother liquor inside the lower part of the tank. The outer wall of the anti-deposition device is provided with an anti-adhesion device, which is used to scrape off lithium carbonate adhering to the inner wall of the tank.

[0011] In one or more embodiments of the present invention, the anti-deposition device includes: four ring blocks, the four ring blocks being fixed to the outer wall of the bending frame; Vertical rods, which are respectively fixed to the bottom surfaces of the four ring blocks; Concave strips, which are respectively fixed to the bottom surfaces of the four vertical rods; Inclined plates, which are respectively embedded in the bottom surface of four concave strips; The vertical rod drives the concave strip block to rotate clockwise, and the concave strip block drives the inclined plate to rotate clockwise. The inclined plate is used to stir the lithium carbonate precipitation mother liquor inside the tank.

[0012] In one or more embodiments of the present invention, a connecting block is fixed to the outer wall of each of the four vertical rods, a spring is fixed to the outer wall of each of the four connecting blocks, a connecting ring is fixed to the lower part of the outer wall of the round rod, and the outer wall of the connecting ring is fixedly connected to the end of the four springs away from the four connecting blocks. The connecting blocks and connecting rings drive the compressed springs to rotate clockwise, and the vibration of the vertical rods during rotation is reduced under the elastic force of the springs.

[0013] In one or more embodiments of the present invention, the anti-adhesion device includes: strips, the strips being fixed to the outer walls of four connecting blocks respectively; The frame poles are respectively fixed to the top of the four strips, and the ends of the frame poles away from the four strips are fixedly connected to the outer walls of the four ring blocks; Vertical groove plates are respectively fixed to the ends of the four strips away from the four connecting blocks; A chamfering plate is fixed to the inner wall of four vertical slot plates. The chamfer of the chamfering plate slides in contact with the inner wall of the tank. The support bar rotates clockwise, which drives the vertical slot plates to rotate clockwise, and the vertical slot plates drive the chamfering plate to rotate clockwise. The chamfer of the chamfering plate scrapes off the lithium carbonate adhering to the tank wall.

[0014] In one or more embodiments of the present invention, a sleeve block is fixed to the bottom of the outer wall of each of the four vertical slot plates, a vertical curved plate is fixed to the inner wall of each of the four sleeve blocks, and a semi-arc plate is fixed to the bottom of each of the four vertical curved plates. The outer walls of the four semi-arc plates slide in contact with the tank body at the angle between them. The vertical curved plate drives the semi-arc plate to rotate clockwise, and the semi-arc plate scrapes off the lithium carbonate at the angle of the tank body.

[0015] A process for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor includes the following steps: S1. Connect the feed pipe to the tank. The feed pipe feeds the lithium carbonate precipitation mother liquor into the tank. The lithium carbonate precipitation mother liquor rises in the tank. The filter membrane filters out the impurities in the lithium carbonate precipitation mother liquor. S2. The round rod rotates in the support tube, which drives the bending frame to rotate in the forward direction. The bending frame drives the screen to rotate in the forward direction. During the rotation, the screen filters large particulate impurities in the lithium carbonate precipitation mother liquor. S3. The ring block drives the vertical rod to rotate clockwise, the vertical rod drives the concave strip block to rotate clockwise, and the concave strip block drives the inclined plate to rotate clockwise. S4. The connecting block and connecting ring drive the compressed spring to rotate in the forward direction, and the spring force reduces the shaking when the vertical rod rotates. S5. The strip plate drives the vertical groove plate to rotate forward, and the vertical groove plate drives the chamfer plate to rotate forward. The chamfer plate scrapes away the lithium carbonate adhering to the tank wall. S6. The vertical bending plate drives the semi-arc plate to rotate in the forward direction, and the semi-arc plate scrapes off the lithium carbonate at the corner of the tank. S7. Open the valve tube, and the lithium carbonate solution in the valve tube enters the crystallization tank; S8. The resistance heater heats the lithium carbonate solution in the crystallization tank, where the lithium carbonate solution crystallizes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention uses a base platform, crystallization component, tank body, valve pipe, tank cover, motor, round rod, ring plate, support pipe, filter membrane and bending frame in conjunction with a mesh tray. The motor shaft drives the round rod to rotate forward, the round rod rotates forward in the tank cover, the round rod rotates forward in the support pipe, the round rod drives the bending frame to rotate forward, the bending frame drives the mesh tray to rotate forward, the lithium carbonate precipitation mother liquor rises in the tank body, the filter membrane filters the impurities in the lithium carbonate precipitation mother liquor, and the mesh tray filters large particulate impurities in the lithium carbonate precipitation mother liquor during the rotation process, preventing large particulate impurities in the lithium carbonate precipitation mother liquor from damaging the filter membrane surface and causing poor equipment recovery and preparation of high-purity lithium carbonate.

[0017] (2) By setting up an anti-deposition device, the present invention enables the ring block, vertical rod and concave strip block to cooperate with the inclined plate. The vertical rod drives the concave strip block to rotate in the forward direction, and the concave strip block drives the inclined plate to rotate in the forward direction. The inclined plate stirs the lithium carbonate precipitation mother liquor below the tank, preventing the lithium carbonate precipitation mother liquor from accumulating below the tank and causing poor filtration effect of the lithium carbonate precipitation mother liquor below the tank.

[0018] (3) By setting up an anti-deposition device, the connecting block and the spring cooperate with the connecting ring. The connecting block and the connecting ring drive the compressed spring to rotate in the forward direction. Under the elastic force of the spring, the shaking of the vertical rod during rotation is reduced, and the vertical rod is prevented from being easily deformed and damaged due to violent shaking during rotation.

[0019] (4) By setting up an anti-adhesion device, the present invention enables the strip plate, the support rod and the vertical groove plate to cooperate with the chamfer plate. The support rod supports the strip plate to rotate in the forward direction, the strip plate drives the vertical groove plate to rotate in the forward direction, the vertical groove plate drives the chamfer plate to rotate in the forward direction, and the chamfer plate scrapes off the lithium carbonate adhering to the tank wall, preventing the tank wall from having a large amount of lithium carbonate adhering to it, which would result in poor lithium carbonate purification effect of the equipment.

[0020] (5) The present invention, through the setting of the anti-adhesion device, makes the sleeve block and the vertical bending plate cooperate with the semi-arc plate. The vertical bending plate drives the semi-arc plate to rotate in the forward direction. The semi-arc plate scrapes off the lithium carbonate at the corner of the tank, preventing the accumulation of lithium carbonate precipitation mother liquor at the corner of the tank from causing corrosion and damage to the corner of the tank. Attached Figure Description

[0021] Figure 1 This is an overall view of one embodiment of the present invention; Figure 2 This is a diagram of internal components in one embodiment of the present invention; Figure 3 This is a cross-sectional view of the tank body in one embodiment of the present invention; Figure 4 As shown in one embodiment of the present invention Figure 3 A magnified view of part A; Figure 5 This is a cross-sectional view of the bottom surface of the tank in one embodiment of the present invention; Figure 6 This is a diagram of an anti-deposition device according to an embodiment of the present invention; Figure 7 As shown in one embodiment of the present invention Figure 6 A magnified view of section B; Figure 8 This is a diagram of an anti-adhesion device according to an embodiment of the present invention; Figure 9 As shown in one embodiment of the present invention Figure 8 A magnified view of a portion of point C.

[0022] Explanation of key figure labels: 1. Base platform; 2. Crystallization assembly; 201. Crystallization tank; 202. Tank cover; 203. Round shell; 204. Resistance heater; 3. Tank body; 4. Valve pipe; 5. Tank cover; 6. Motor; 7. Round rod; 8. Ring plate; 9. Support pipe; 10. Filter membrane; 11. Bending frame; 12. Mesh tray; 13. Anti-deposition device; 131. Ring block; 132. Vertical rod; 133. Concave strip block; 134. Inclined plate; 135. Connecting block; 136. Spring; 137. Connecting ring; 14. Anti-adhesion device; 141. Strip plate; 142. Support rod; 143. Vertical groove plate; 144. Chamfered plate; 145. Sleeve block; 146. Vertical bending plate; 147. Semi-arc plate. Detailed Implementation

[0023] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0024] like Figure 1-9As shown, an apparatus for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor includes: a base platform 1, and a crystallization component 2 is provided on the right side of the top surface of the base platform 1. The crystallization component 2 includes: a crystallization tank 201, a tank hole cover 202, a circular shell 203, and a resistance heater 204. The crystallization tank 201 is fixed on the right side of the top surface of the base platform 1, the tank hole cover 202 is fixed on the top surface of the crystallization tank 201, the circular shell 203 is fixed on the outer wall of the crystallization tank 201, and the resistance heater 204 is disposed between the inner wall of the circular shell 203 and the outer wall of the crystallization tank 201. A tank 3 is provided on the left side of the top surface of the base 1, and a valve pipe 4 is provided between the tank 3 and the crystallization component 2; Can lid 5 is fixedly installed on the top surface of can body 3; Motor 6 is installed on the top surface of can lid 5; A round rod 7 is installed inside the top of the can lid 5 and is rotatably mounted therethrough. The top of the round rod 7 is fixedly connected to the bottom surface of the rotating shaft of the motor 6. Ring plate 8, the ring plate 8 is fixed above the inner wall of tank body 3; Scaffolding pipe 9 is fixed to the top surface of ring plate 8; The filter membrane 10 is fixed above the inner wall of the ring plate 8, and the support tube 9 passes through and is fixed in the middle of the filter membrane 10. The outer wall of the round rod 7 is in rotatable contact with the inner wall of the support tube 9; Bend frame 11 is fixed to the lower part of the outer wall of round rod 7; The mesh tray 12 is fixed on the top surface of the bending frame 11. The outer wall of the mesh tray 12 is in rotatable contact with the inner wall of the ring plate 8, and the inner wall of the mesh tray 12 is rotatably connected to the outer wall of the support tube 9. Cloud drive 12 is used to screen out large particulate impurities in lithium carbonate precipitation mother liquor; The bottom of the base 1 is provided with four support feet, the bottom left side of the tank 3 is provided with a feed port, the filter membrane 10 is used to filter impurities in the lithium carbonate precipitation mother liquor, the top surface of the mesh tray 12 is provided with several reinforcing ribs, the valve pipe 4 is located above the ring plate 8, the resistance heater 204 is located below the valve pipe 4, and the mesh tray 12 is located below the filter membrane 10. When using this equipment, the base platform 1 supports the tank body 3. The operator connects the feed pipe to the tank body 3, and the feed pipe feeds the lithium carbonate precipitation mother liquor into the tank body 3. At the same time, the operator starts the motor 6 on the tank cover 5. The shaft of the motor 6 starts to rotate forward, and the shaft of the motor 6 drives the round rod 7 to rotate forward. The round rod 7 rotates forward in the tank cover 5. The tank body 3 supports the ring plate 8, and the ring plate 8 supports the frame tube 9. The round rod 7 rotates forward in the frame tube 9, and the round rod 7 drives the bending frame 11 to rotate forward. The bending frame 11 drives the mesh tray 12 to rotate forward. The lithium carbonate precipitation mother liquor rises in the tank body 3. The filter membrane 10 filters the impurities in the lithium carbonate precipitation mother liquor. The lithium carbonate solution passes through the filter membrane 10 and rises. During the rotation of the mesh tray 12, large particulate impurities in the lithium carbonate precipitation mother liquor are filtered out, thereby avoiding the equipment from being damaged during recycling. During the preparation of high-purity lithium carbonate, large particulate impurities in the lithium carbonate precipitation mother liquor can damage the surface of the filter membrane 10, resulting in poor equipment recovery and preparation of high-purity lithium carbonate. The operator opens valve pipe 4, and the lithium carbonate solution enters valve pipe 4. The lithium carbonate solution in valve pipe 4 enters the crystallization tank 201 of the crystallization component 2. The operator starts the resistance heater 204 in the round shell 203. The resistance heater 204 heats the lithium carbonate solution in the crystallization tank 201. The water vapor evaporated from the lithium carbonate solution is discharged from the round hole of the tank cover 202. The lithium carbonate solution crystallizes in the crystallization tank 201. After the reaction is completed, the operator removes the tank cover 202 of the crystallization tank 201 and takes out the high-purity lithium carbonate crystals from the crystallization tank 201. The outer wall of the bending frame 11 is provided with an anti-deposition device 13, which is used to stir the lithium carbonate precipitation mother liquor inside the lower part of the tank 3. The outer wall of the anti-deposition device 13 is provided with an anti-adhesion device 14, which is used to scrape off the lithium carbonate adhering to the inner wall of the tank 3.

[0025] The anti-deposition device 13 includes: four ring blocks 131, which are fixed to the outer wall of the bending frame 11; Vertical rod 132 is fixed to the bottom surface of four ring blocks 131 respectively; Concave strip 133, concave strip 133 is fixed to the bottom surface of the four vertical rods 132 respectively; Inclined plate 134 is embedded in the bottom surface of four concave strips 133 respectively; Inclined plate 134 is used to stir the lithium carbonate precipitation mother liquor inside the lower part of tank 3; While the bending frame 11 drives the mesh disk 12 to rotate clockwise, the bending frame 11 drives the ring block 131 to rotate clockwise, the ring block 131 drives the vertical rod 132 to rotate clockwise, the vertical rod 132 drives the concave strip block 133 to rotate clockwise, and the concave strip block 133 drives the inclined plate 134 to rotate clockwise. During the rotation, the inclined plate 134 stirs the lithium carbonate precipitation mother liquor below the tank 3, thereby avoiding the problem of poor filtration effect of lithium carbonate precipitation mother liquor below the tank 3 due to the accumulation of lithium carbonate precipitation mother liquor below the tank 3 during the process of recycling and preparing high-purity lithium carbonate.

[0026] A connecting block 135 is fixed to the outer wall of each of the four vertical rods 132, and a spring 136 is fixed to the outer wall of each of the four connecting blocks 135. A connecting ring 137 is fixed to the lower part of the outer wall of the round rod 7. The outer wall of the connecting ring 137 is fixedly connected to the end of the four springs 136 away from the four connecting blocks 135. While the vertical rod 132 drives the concave strip block 133 to rotate clockwise, the vertical rod 132 drives the connecting block 135 to rotate clockwise, the round rod 7 drives the connecting ring 137 to rotate clockwise, and the connecting block 135 and the connecting ring 137 drive the compressed spring 136 to rotate clockwise. Under the elastic force of the spring 136, the vibration of the vertical rod 132 during rotation is reduced, thereby avoiding the problem that the vertical rod 132 is easily deformed and damaged due to violent vibration during the process of recycling and preparing high-purity lithium carbonate.

[0027] The anti-adhesion device 14 includes: a strip 141, which is fixed to the outer wall of four connecting blocks 135 respectively; The support pole 142 is fixed to the top of the four strips 141 respectively, and the end of the support pole 142 away from the four strips 141 is fixedly connected to the outer wall of the four ring blocks 131. Vertical groove plate 143 is fixed to one end of each of the four strip plates 141 away from the four connecting blocks 135; Chamfer plate 144 is fixed to the inner wall of the four vertical slot plates 143 respectively, and the chamfer of the chamfer plate 144 slides in contact with the inner wall of the tank body 3. While the vertical rod 132 drives the connecting block 135 to rotate clockwise, the connecting block 135 drives the strip plate 141 to rotate clockwise, the ring block 131 drives the frame rod 142 to rotate clockwise, the frame rod 142 supports the strip plate 141 to rotate clockwise, the strip plate 141 drives the vertical groove plate 143 to rotate clockwise, and the vertical groove plate 143 drives the chamfer plate 144 to rotate clockwise. During the rotation, the chamfer plate 144 scrapes away the lithium carbonate adhering to the wall of the tank 3, thereby avoiding the problem of poor lithium carbonate purification effect caused by a large amount of lithium carbonate adhering to the wall of the tank 3 during the process of recycling and preparing high-purity lithium carbonate.

[0028] A sleeve block 145 is fixed to the bottom of the outer wall of each of the four vertical slot plates 143. A vertical curved plate 146 is fixed to the inner wall of each of the four sleeve blocks 145. A semi-arc plate 147 is fixed to the bottom of each of the four vertical curved plates 146. The outer walls of the four semi-arc plates 147 slide in contact with the tank body 3 at the angle between them. While the vertical groove plate 143 drives the chamfer plate 144 to rotate clockwise, the vertical groove plate 143 drives the sleeve block 145 to rotate clockwise, the sleeve block 145 drives the vertical bending plate 146 to rotate clockwise, and the vertical bending plate 146 drives the semi-arc plate 147 to rotate clockwise. During the rotation, the semi-arc plate 147 scrapes off the lithium carbonate at the corner of the tank body 3, thereby avoiding the accumulation of lithium carbonate precipitation mother liquor at the corner of the tank body 3 during the process of recycling and preparing high-purity lithium carbonate, which would cause the lithium carbonate precipitation mother liquor to corrode and damage the corner of the tank body 3.

[0029] A process for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor includes the following steps: S1. Connect a conveying pipe to tank 3. The conveying pipe feeds lithium carbonate precipitation mother liquor into tank 3. The lithium carbonate precipitation mother liquor rises in tank 3. Filter membrane 10 filters impurities in the lithium carbonate precipitation mother liquor. S2. The round rod 7 rotates in the support tube 9, which drives the bending frame 11 to rotate in the forward direction. The bending frame 11 drives the mesh tray 12 to rotate in the forward direction. During the rotation, the mesh tray 12 filters large particulate impurities in the lithium carbonate precipitation mother liquor. S3, the ring block 131 drives the vertical rod 132 to rotate clockwise, the vertical rod 132 drives the concave strip block 133 to rotate clockwise, the concave strip block 133 drives the inclined plate 134 to rotate clockwise; S4, connecting block 135 and connecting ring 137 drive the compressed spring 136 to rotate in the forward direction. Under the elastic force of spring 136, the shaking of vertical rod 132 during rotation is reduced. S5, the strip plate 141 drives the vertical groove plate 143 to rotate forward, the vertical groove plate 143 drives the chamfer plate 144 to rotate forward, and the chamfer of the chamfer plate 144 scrapes off the lithium carbonate adhering to the wall of the tank 3. S6, the vertical bending plate 146 drives the semi-arc plate 147 to rotate in the forward direction, and the semi-arc plate 147 scrapes off the lithium carbonate at the included angle of the tank body 3. S7. Open valve pipe 4, and the lithium carbonate solution in valve pipe 4 enters crystallization tank 201; S8. The resistance heater 204 heats the lithium carbonate solution in the crystallization tank 201, and the lithium carbonate solution crystallizes in the crystallization tank 201.

[0030] Working principle: A feed pipe is connected to tank 3, which feeds the lithium carbonate precipitation mother liquor into tank 3. The shaft of motor 6 drives the round rod 7 to rotate forward. The round rod 7 rotates forward in the tank cover 5 and in the support pipe 9. The round rod 7 drives the bending frame 11 to rotate forward, and the bending frame 11 drives the mesh tray 12 to rotate forward. The lithium carbonate precipitation mother liquor rises in tank 3. The filter membrane 10 filters impurities in the lithium carbonate precipitation mother liquor. The lithium carbonate solution passes through the filter membrane 10 and rises. During the rotation of the mesh tray 12, carbon dioxide is filtered out. Large particulate impurities in the lithium carbonate mother liquor are removed by opening valve pipe 4, allowing the lithium carbonate solution in valve pipe 4 to enter the crystallization tank 201 of crystallization component 2. Resistance heater 204 heats the lithium carbonate solution in crystallization tank 201, and the water vapor evaporated from the lithium carbonate solution is discharged from the round hole of tank cover 202. The lithium carbonate solution crystallizes in crystallization tank 201. After the reaction is completed, tank cover 202 of crystallization tank 201 is removed, and high-purity lithium carbonate crystals are taken out from crystallization tank 201.

[0031] The bending frame 11 drives the ring block 131 to rotate clockwise, the ring block 131 drives the vertical rod 132 to rotate clockwise, the vertical rod 132 drives the concave strip block 133 to rotate clockwise, the concave strip block 133 drives the inclined plate 134 to rotate clockwise, and the inclined plate 134 stirs the lithium carbonate precipitation mother liquor below the tank body 3. The vertical rod 132 drives the connecting block 135 to rotate clockwise, the round rod 7 drives the connecting ring 137 to rotate clockwise, and the connecting block 135 and the connecting ring 137 drive the compressed spring 136 to rotate clockwise. Under the elastic force of the spring 136, the vibration of the vertical rod 132 during rotation is reduced. The connecting block 135 drives the strip plate 141 to rotate forward, the support rod 142 supports the strip plate 141 to rotate forward, the strip plate 141 drives the vertical groove plate 143 to rotate forward, the vertical groove plate 143 drives the chamfer plate 144 to rotate forward, and the chamfer of the chamfer plate 144 scrapes off the lithium carbonate attached to the wall of the tank 3. The vertical groove plate 143 drives the sleeve block 145 to rotate forward, the sleeve block 145 drives the vertical bending plate 146 to rotate forward, the vertical bending plate 146 drives the semi-arc plate 147 to rotate forward, and the semi-arc plate 147 scrapes off the lithium carbonate at the included angle of the tank body 3.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor, characterized in that, include: A base (1) is provided with a crystallization component (2) on the right side of the top surface of the base (1) and a tank (3) is provided on the left side of the top surface of the base (1). A valve pipe (4) is provided between the tank (3) and the crystallization component (2). The can lid (5) is fixedly installed on the top surface of the can body (3); Motor (6), said motor (6) is mounted on the top surface of the can lid (5); A round rod (7) is installed inside the top of the can lid (5) through and rotatably, and the top of the round rod (7) is fixedly connected to the bottom surface of the rotating shaft of the motor (6); Ring plate (8), which is fixed above the inner wall of the tank body (3); The support tube (9) is fixed to the top surface of the ring plate (8); The filter membrane (10) is fixed above the inner wall of the ring plate (8), and the support tube (9) passes through and is fixed in the middle of the filter membrane (10); The outer wall of the round rod (7) is in rotatable contact with the inner wall of the support tube (9); A bending frame (11) is fixed below the outer wall of the round rod (7); The mesh tray (12) is fixed on the top surface of the bending frame (11). The outer wall of the mesh tray (12) is in rotatable contact with the inner wall of the ring plate (8). The inner wall of the mesh tray (12) is rotatably connected to the outer wall of the support tube (9). The mesh screen (12) is used to screen out large particulate impurities in the lithium carbonate precipitation mother liquor.

2. The equipment for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 1, characterized in that, The crystallization assembly (2) includes: a crystallization tank (201), a tank cover (202), a circular shell (203), and a resistance heater (204). The crystallization tank (201) is fixed to the right side of the top surface of the base (1), the tank cover (202) is fixed to the top surface of the crystallization tank (201), the circular shell (203) is fixed to the outer wall of the crystallization tank (201), and the resistance heater (204) is disposed between the inner wall of the circular shell (203) and the outer wall of the crystallization tank (201).

3. The equipment for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 2, characterized in that, The base (1) has four supporting feet on its bottom surface, the tank (3) has a feed inlet on its left bottom, the filter membrane (10) is used to filter impurities in the lithium carbonate precipitation mother liquor, and the mesh tray (12) has several reinforcing ribs on its top surface.

4. The equipment for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 3, characterized in that, The valve tube (4) is located above the ring plate (8), the resistance heater (204) is located below the valve tube (4), and the mesh disk (12) is located below the filter membrane (10).

5. The equipment for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 4, characterized in that, The outer wall of the bending frame (11) is provided with an anti-deposition device (13), which is used to stir the lithium carbonate precipitation mother liquor inside the tank (3); The outer wall of the anti-deposition device (13) is provided with an anti-adhesion device (14), which is used to scrape off the lithium carbonate adhering to the inner wall of the tank (3).

6. The apparatus for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 5, characterized in that, The anti-deposition device (13) includes: four ring blocks (131), which are fixed to the outer wall of the bending frame (11); Vertical rod (132), which is fixed to the bottom surface of four ring blocks (131); Concave strips (133) are fixed to the bottom surfaces of four vertical rods (132); Inclined plate (134), the inclined plate (134) is respectively embedded in the bottom surface of four concave strips (133); The inclined plate (134) is used to stir the lithium carbonate precipitation mother liquor inside the tank (3) below.

7. The apparatus for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 6, characterized in that, A connecting block (135) is fixed to the outer wall of each of the four vertical rods (132), and a spring (136) is fixed to the outer wall of each of the four connecting blocks (135). A connecting ring (137) is fixed to the lower part of the outer wall of the round rod (7). The outer wall of the connecting ring (137) is fixedly connected to the end of the four springs (136) away from the four connecting blocks (135).

8. The apparatus for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 7, characterized in that, The anti-adhesion device (14) includes: a strip (141), which is fixed to the outer wall of four connecting blocks (135); The frame pole (142) is fixed to the top of the four strips (141) respectively, and the end of the frame pole (142) away from the four strips (141) is fixedly connected to the outer wall of the four ring blocks (131); Vertical groove plate (143), the vertical groove plate (143) is fixed to one end of the four strips (141) away from the four connecting blocks (135); Chamfer plate (144) is fixed to the inner wall of four vertical groove plates (143) respectively, and the chamfer of the chamfer plate (144) slides in contact with the inner wall of the tank (3).

9. The equipment for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor according to claim 8, characterized in that, A sleeve block (145) is fixed to the bottom of the outer wall of each of the four vertical groove plates (143), a vertical curved plate (146) is fixed to the inner wall of each of the four sleeve blocks (145), a semi-arc plate (147) is fixed to the bottom of each of the four vertical curved plates (146), and the outer wall of the four semi-arc plates (147) slides in contact with the tank body (3) at the angle between them.

10. A process for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor, using the equipment for preparing high-purity lithium carbonate by recovering lithium carbonate precipitation mother liquor as described in claim 9, comprising the following steps: S1. Connect the feed pipe to the tank (3). The feed pipe feeds the lithium carbonate precipitation mother liquor into the tank (3). The lithium carbonate precipitation mother liquor rises in the tank (3). The filter membrane (10) filters the impurities in the lithium carbonate precipitation mother liquor. S2. The round rod (7) rotates in the support tube (9). The round rod (7) drives the bending frame (11) to rotate in the forward direction. The bending frame (11) drives the mesh disk (12) to rotate in the forward direction. The mesh disk (12) filters large particulate impurities in the lithium carbonate precipitation mother liquor during the rotation process. S3, the ring block (131) drives the vertical rod (132) to rotate clockwise, the vertical rod (132) drives the concave strip block (133) to rotate clockwise, and the concave strip block (133) drives the inclined plate (134) to rotate clockwise; S4, connecting block (135) and connecting ring (137) drive the compressed spring (136) to rotate in the forward direction. Under the elastic force of spring (136), the shaking of the vertical rod (132) during rotation is reduced. S5, the strip plate (141) drives the vertical groove plate (143) to rotate in the forward direction, the vertical groove plate (143) drives the chamfer plate (144) to rotate in the forward direction, and the chamfer of the chamfer plate (144) scrapes off the lithium carbonate attached to the wall of the tank (3); S6, the vertical bending plate (146) drives the semi-arc plate (147) to rotate in the forward direction, and the semi-arc plate (147) scrapes off the lithium carbonate at the corner of the tank (3); S7. Open valve pipe (4), and the lithium carbonate solution in valve pipe (4) enters crystallization tank (201); S8. The resistance heater (204) heats the lithium carbonate solution in the crystallization tank (201), and the lithium carbonate solution crystallizes in the crystallization tank (201).

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