Crystallization device for lithium carbonate crystallization and purification fluidization tower

Abstract

The invention relates to a crystallization device for a lithium carbonate crystallization and purification fluidization tower, and belongs to the field of lithium carbonate preparation equipment.The crystallization device comprises a tower drum and a plurality of sampling valve banks installed on the side wall of the tower drum, each sampling valve bank comprises an isolation hood, a closed drum and a sample core rod, a plurality of through holes are formed in the hood wall of the isolation hood, the isolation hood is fixed to the inner side wall of the tower drum, and the closed drum is fixed to the inner side wall of the tower drum. The closed barrel is of a barrel-shaped structure with a plurality of through holes in the barrel wall, the closed barrel is coaxially and rotatably mounted outside the isolation hood, the sample core rod is coaxially located in the isolation hood after being inserted into the tower barrel, and the sample core rod is in transmission connection with the closed barrel through a transmission assembly, so that when the sample core rod enters the isolation hood, the sample core rod is in transmission connection with the closed barrel. When the sample core rod retreats from the isolation cover, the sealing cylinder rotates to the position where all the penetrating holes are communicated with the corresponding through holes one by one, and when the sample core rod retreats from the isolation cover, the sealing cylinder rotates to the position where all the penetrating holes are sealed. According to the invention, the size of the generated lithium carbonate particles can be quickly and reliably sampled and checked in the lithium carbonate crystallization process.

Description

Technical Field

[0001] The invention relates to the technical field of lithium carbonate preparation, and in particular to a fluidized tower crystallization device for lithium carbonate crystallization purification. Background Art

[0002] Lithium carbonate is an important lithium salt compound, which is widely used in many industries such as batteries, ceramics, glass, metallurgy, and pharmaceuticals. Its production methods mainly include extraction from natural brine resources and chemical synthesis. Among them, the extraction of lithium carbonate from natural brine resources has many advantages over traditional ore refining methods and chemical synthesis, especially in large-scale commercial production. There are a large number of salt lake brine reserves in the world, which provides a huge reserve of lithium resources. Secondly, the cost is low. The cost of extracting lithium from brine has dropped significantly, especially in areas with high concentrations of salt lake brine. The mining and processing process is simpler. And it has less impact on the environment. Compared with hard rock mining, brine mining has a lesser degree of disturbance to the ecological environment. There is no need for large-scale excavation and rock crushing, which reduces vegetation damage and dust problems.

[0003] In addition, salt lake brine is generally located in the shallow layer below the surface, which is easy to continuously extract and replenish. In theory, it can be regarded as a "regenerative" lithium resource with long-term development value. Moreover, more importantly, the technology is mature. After years of development, the technology of lithium extraction from brine has been quite perfected, including evaporation concentration, precipitation, adsorption exchange, reverse osmosis and other process combinations, which can effectively cope with different water quality challenges. For example, in a Chinese patent with publication number CN221601287U, a fluidized tower crystallization device for lithium carbonate crystallization purification is disclosed, which mainly includes a dosing system, a water inlet system, and a lithium carbonate crystallization fluidized system. The core lithium carbonate crystallization fluidized system includes the lithium carbonate crystallization fluidized tower. A fluidized bed crystallization outlet is provided above the lithium carbonate crystallization fluidized tower, and a bottom water discharge outlet is provided below the tower. A first sampling valve group including a plurality of first sampling valves is also provided at the top of the lithium carbonate crystallization fluidized tower, and a second sampling valve group including a plurality of second sampling valves is provided at the bottom. A plurality of sampling valve groups of different depths can be set as needed to take samples in real time to check whether the lithium carbonate crystal particles inside meet the production needs and whether the final discharge of the lithium carbonate particles can be carried out. In the prior art, there is no introduction to the sampling structure of lithium carbonate particles, because there are reaction liquid and already generated lithium carbonate crystal particles in the tower of the sulfide tower crystallization device, how to conveniently take out a small amount of local lithium carbonate particles is a difficult problem, which is easy to cause leakage of the reaction liquid of the crystallization device, and how to return the sample or the carrier formed by the lithium carbonate attachment after sampling. Therefore, it is urgent to design a new type of purification fluidized tower crystallization device that can sample very conveniently during the lithium carbonate crystallization process and will not fail to be automatically closed in time due to sampling. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a fluidized tower crystallization device for lithium carbonate crystallization purification, so as to solve the problem that the structural equipment in the prior art cannot conveniently and reliably perform random inspections on the lithium carbonate particles in the fluidized tower for lithium carbonate crystallization purification to check the particle size.

[0005] The present invention is achieved through the following technical solutions:

[0006] A fluidized tower crystallization device for lithium carbonate crystallization purification comprises a tower and a plurality of sampling valve groups installed on the side wall of the tower, the sampling valve group comprises an isolation cover, a closing tube and a sample core rod, wherein the cover wall of the isolation cover is provided with a plurality of through holes, the isolation cover is fixed on the inner wall of the tower, the closing tube is a cylindrical structure with a plurality of through holes on the tube wall, and the closing tube is coaxially rotatably installed on the outside of the isolation cover, the sample core rod is coaxially located in the isolation cover after being inserted into the tower, the sample core rod is transmission-connected to the closing tube through a transmission assembly, so that when the sample core rod enters the isolation cover, the closing tube rotates to a position where all the through holes are connected to the corresponding through holes one by one, and when the sample core rod exits the isolation cover, the closing tube rotates to a position where all the through holes are closed.

[0007] Furthermore, one end of the isolation cover is closed, and the other end has an annular disk, which is fixedly arranged close to the inner wall of the tower; the end of the closed tube facing the inner wall of the tower has an annular cover body, and the inner wall of one end of the annular cover body is in rotationally fitting contact with the end face of the annular disk, and the other end is rotationally fittingly inserted into the wall of the tower.

[0008] Furthermore, the transmission assembly includes an inner gear ring, a speed gear and a driving gear that mesh in sequence, the inner gear ring is coaxially fixed to the other end of the annular cover, the speed gear is rotatably installed in the wall of the tower, and the driving gear is installed on the sample core rod.

[0009] Furthermore, the sample core rod also coaxially has a stud section and a sealed optical shaft section, wherein the stud section is located between the sealed optical shaft section and the driving gear, and the length of the sealed optical shaft section must meet the following conditions: when the sample core rod is rotationally inserted, the end face of the sealed optical shaft section fits with the end face of the annular disk, the stud section is screwed into the bottom, and at this time the through holes and through holes are aligned and connected one by one; when the sample core rod is rotationally taken out, the sealed optical shaft section is completely out of contact with the wall of the tower tube, the closing tube covers and closes all the through holes, and the driving gear is disengaged from the speed gear.

[0010] Furthermore, the length of the sealing optical axis section is equal to the axial length of the meshing between the driving gear and the speed change gear when the sample core rod is inserted to the bottom.

[0011] Furthermore, an operating hand wheel is coaxially fixed to one end of the driving gear close to the outside of the tower, and the operating hand wheel is rotated to drive the sample core rod to rotate.

[0012] Furthermore, a guide rod is coaxially fixed to the bottom of the isolation cover, and the guide rod extends into the sample core rod in an axially sliding manner. The length of the guide rod must be such that the guide rod extends out of the wall of the tower.

[0013] Furthermore, the outer side surface of the inner gear ring is flush with the outer side surface of the annular cover body, and its inner tooth top surface extends inwardly beyond the inner side surface of the annular cover body, and the inner gear ring and the annular cover body are fastened together by a plurality of fastening screws, and the fastening screws are arranged parallel to the axial direction of the inner gear ring.

[0014] Furthermore, one side of the inner gear ring facing the outer side of the tower is pressed by one end of a plurality of locking rods arranged in a ring array, and the locking rods are arranged parallel to the axial direction of the inner gear ring, with the axial direction of the inner gear ring as the central axis of the ring array, and the other end of the locking rods is connected to the end face of a pressure ring through a pressure spring, and the pressure ring is axially pressed by a locking gland threaded on the outer wall of the tower to fix the inner gear ring and the closing tube.

[0015] Furthermore, the closed end of the closing cylinder close to the isolation cover is also a closed structure.

[0016] The beneficial effects of the present invention are:

[0017] In short, the core principle of the fluidized tower crystallization device for lithium carbonate crystallization purification is to generate lithium carbonate particles through a sample core rod isolated by an isolation cover. When taking out the lithium carbonate particles attached to the sample core rod, the isolation cover can be isolated by the closed cylinder, and then the sample core rod can be taken out separately to observe and measure whether the size of the generated lithium carbonate particles meets the requirements and whether they can be taken out. When the sample core rod is inserted, the isolation cover automatically restores the connection with the inside of the tower, so that the lithium carbonate particles can continue to grow. It has a simple structure and outstanding effect, and is very practical in the production of lithium carbonate particle crystallization.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 for Figure 1 The enlarged structure diagram at A in the middle;

[0021] Figure 3 for Figure 2 In the structure shown, the structural diagram after the sample core rod and its accessories are taken out;

[0022] Figure 4 This is an enlarged structural diagram of position A when a guide rod is provided;

[0023] Figure 5 A structural diagram of the sample core rod and its installed accessories;

[0024] Figure 6 for Figure 2 A magnified view of the structure at B in the middle;

[0025] Figure 7 It is a structural diagram of an inner gear ring;

[0026] Figure 8 Another installation structure of an inner gear ring and its locking structure diagram;

[0027] Fig. 9 for Figure 8 In the structure shown, a partial right view after removing the locking gland;

[0028] Fig.10 This is a schematic diagram of the end face of the pressure ring.

[0029] In the figure: tower 1, sampling valve assembly 2, sample core rod 3, isolation cover 4, perforation 401, annular disk 402, closing cylinder 5, through hole 501, sealing optical axis section 6, stud section 7, driving gear 8, operating hand wheel 9, speed change gear 10, inner ring 11, annular cover body 12, guide rod 13, fastening screw 14, locking rod 15, pressure spring 16, pressure ring 17, locking cover 18. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] See also Figure 1 The present invention provides a technical solution: a fluidized tower crystallization device for lithium carbonate crystallization purification in this embodiment mainly comprises a tower 1 and a plurality of sampling valve groups installed on the side wall of the tower 1. The key point is that the sampling valve group is as follows: Figure 1-4 As shown, it specifically includes an isolation cover 4, a closed tube 5 and a sample core rod 3. The sample core rod 3 here is used for the attachment and growth of lithium carbonate crystal particles. It is best to have a number of grooves (not shown) on its surface. These grooves are used to accommodate the growth of lithium carbonate particles so that when the sample core rod 3 needs to be pulled out in subsequent operations, enough lithium carbonate particles can be taken out. In more detail, the cover wall of the isolation cover 4 in this embodiment is provided with a number of perforations 401 for the reaction solution to enter. The isolation cover 4 is fixed on the inner wall of the tower 1, preferably radially fixed. In addition, the closed tube 5 is a tubular structure with a number of through holes 501 on the tube wall. It can be open at both ends, or the closed end of the closed tube 5 against the isolation cover 4 is also a closed structure. Specifically, the size of the through hole 501 designed above can be consistent with the size of the perforation 401, and it is appropriate not to exceed 1.5 mm to avoid the lithium carbonate particles of the required particle size generated from being gathered in the hole in large quantities. The size can be specifically designed adaptively. When making this device, this closing cylinder 5 is coaxially rotatably installed on the outside of the isolation cover 4. After the sample core rod 3 is inserted into the tower 1, it needs to be coaxially located in the isolation cover 4, so that after the reaction liquid enters the isolation cover 4, the reaction generates lithium carbonate particles, so that the sample core rod 3 can be taken out later to check whether the size of the lithium carbonate particles at the corresponding depth meets the production requirements, for example, whether it reaches 1.5mm-3mm. In order to prevent the tower 1 from leaking when taking out the sample, in particular, this sample core rod 3 is connected to the closing cylinder 5 through a transmission assembly, so that when the sample core rod 3 enters the isolation cover 4, the closing cylinder 5 is rotated during the period, so that the closing cylinder 5 is rotated to the position where all the perforations 401 are connected to the corresponding through holes 501 one by one, and then the reaction liquid enters, so as to generate lithium carbonate particles later, and when the sample core rod 3 exits the isolation cover 4, the closing cylinder 5 is rotated together, so that the closing cylinder 5 is rotated to the position where all the perforations 401 are closed, so as to avoid leakage due to taking out the sample core rod 3.

[0034] In this embodiment, Figure 2-4One end of the isolation cover 4 is closed, and the other end has an annular disk 402, which is fixedly arranged close to the inner wall of the tower 1. In addition, an annular cover body 12 is provided at one end of the closed tube 5 facing the inner wall of the tower 1, and the inner wall of one end of the annular cover body 12 is in rotationally matched contact with the end surface of the annular disk 402, so that the closed tube 5 can rotate relative to the isolation cover 4, and the other end of the closed tube 5 can be inserted into the tube wall of the tower 1 in a rotationally matched manner, so as to achieve a good rotation installation.

[0035] In this embodiment, more specifically, Figure 2 and Figure 5 The transmission assembly used includes an inner gear ring 11, a speed gear 10 and a driving gear 8 which mesh in sequence. The inner gear ring 11 is coaxially fixed to the other end of the annular cover 12, the speed gear 10 is rotatably mounted in the wall of the tower 1, and the driving gear 8 is mounted on the sample core rod 3, thereby forming a Figure 5 The structure shown.

[0036] Continue reading Figure 5 The sample core rod 3 also coaxially has a stud section 7 and a sealing optical shaft section 6. The stud section 7 is located between the sealing optical shaft section 6 and the driving gear 8, and the length of the sealing optical shaft section 6 must meet the following conditions: that is, during operation, when the sample core rod 3 is rotationally inserted into the tower 1, the end face of the sealing optical shaft section 6 is in contact with the end face of the annular disk 402, thereby sealing the inner cavity of the isolation cover 4. At the same time, the stud section 7 has also been screwed into the bottom, thereby realizing the fixed installation of the sample core rod 3. At this time, the through hole 401 and the through hole 501 are aligned and connected one by one, so that the reaction liquid can enter the isolation cover 4. On the contrary, when the sample core rod 3 is rotated and taken out, the sealing optical axis section 6 is completely out of contact with the wall of the tower tube 1, and the inner cavity of the isolation cover 4 will be exposed. At this time, the sealing tube 5 covers and seals all the perforations 401 to avoid leakage. At this time, the driving gear 8 is out of mesh with the speed gear 10, and the isolation cover 4 remains stationary, maintaining the isolation state between the interior of the isolation cover 4 and the interior of the tower tube 1. In specific practice, it can be as follows Figure 6 As shown, the length of the sealed optical shaft section 6 is just equal to the axial length of the meshing between the driving gear 8 and the speed change gear 10 when the sample core rod 3 is inserted to the bottom, that is, both are equal to D. For the convenience of operation, an operating hand wheel 9 is coaxially fixed to the end of the driving gear 8 close to the outside of the tower 1, and the operating hand wheel 9 is turned to drive the sample core rod 3 to rotate.

[0037] In order to facilitate the removal and insertion of the sample core rod 3, Figure 4 As shown, a guide rod 13 is coaxially fixed at the bottom of the isolation cover 4. The guide rod 13 extends into the sample core rod 3 in an axially sliding manner. The length of the guide rod 13 must allow the guide rod 13 to extend out of the wall of the tower 1 to guide the sample core rod 3 to go straight in and out.

[0038] In this embodiment, Figure 8 The outer side surface of the inner gear ring 11 is flush with the outer side surface of the annular cover body 12 for sealing installation, and the tooth top surface on the inner side of the inner gear ring 11 extends inwardly beyond the inner side surface of the annular cover body 12, and the inner gear ring 11 and the annular cover body 12 need to be fastened together by a plurality of fastening screws 14, and these fastening screws 14 are arranged parallel to the axial direction of the inner gear ring 11, connecting the inner gear ring 11 and the annular cover body 12 as a whole. This structural design can not only realize the disassembly and installation of the inner gear ring 11, but also can realize the disassembly and installation of the inner gear ring 11. Figure 8 As shown, the sealing tube 5 and the isolation cover 4 can be sleeved together without separation, and can also be matched in a stable rotation.

[0039] In the above structural design, a better structure is as follows Figure 8 The inner gear ring 11 is pressed by one end of a plurality of locking rods 15 arranged in an annular array on the side facing the outer side of the tower 1. The locking rods 15 are arranged parallel to the axial direction of the inner gear ring 11. The locking rods 15 take the axial direction of the inner gear ring 11 as the central axis of the annular array. The other end of the locking rods 15 is connected to a pressure spring 16 through a pressure spring 16. Fig.10 The end faces of the pressure ring 17 shown are connected, and the pressure ring 17 is axially compressed by a locking gland 18 that is threadedly sleeved on the outer wall of the tower 1, and then pushes and squeezes the inner gear ring 11 to prevent the inner gear ring 11 and the closing tube 5 from being fixed, maintain the required position state, and avoid misoperation. In addition, it should be specially explained that the above structural design uses the locking rod 15 for pushing and squeezing instead of direct squeezing by the pressure ring 17. This is because if the pressure ring 17 is used for direct squeezing, the wall of the tower 1 will have a situation where the installation groove of the annular cover body 12 and the installation groove of the pressure ring 17 are connected. In this case, a cylindrical part will be directly cut out of the wall of the tower 1, which will cause leakage and make the installation structure more difficult to design. If the locking rod 15 is used, Fig. 9 As shown, it is only necessary to process a plurality of circular holes at intervals and install the locking rod 15, which will not cause the side wall of the tower tube 1 to be partially hollowed out. Therefore, this design is particularly ingenious and reliable for fixing the closed tube 5 of this structure.

[0040] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A fluidized tower crystallization device for lithium carbonate crystallization and purification, comprising a tower (1) and a plurality of sampling valve groups installed on the side wall of the tower (1), characterized in that: The sampling valve group comprises an isolation cover (4), a closing cylinder (5) and a sample core rod (3), wherein the cover wall of the isolation cover (4) is provided with a plurality of through holes (401), the isolation cover (4) is fixed on the inner wall of the tower (1), the closing cylinder (5) is a cylindrical structure with a plurality of through holes (501) on the cylinder wall, and the closing cylinder (5) is coaxially rotatably mounted on the outside of the isolation cover (4), the sample core rod (3) is coaxially located in the isolation cover (4) after being inserted into the tower (1), the sample core rod (3) is transmission-connected to the closing cylinder (5) through a transmission assembly, so that when the sample core rod (3) enters the isolation cover (4), the closing cylinder (5) rotates to a position where all the through holes (401) are connected to the corresponding through holes (501) one by one, and when the sample core rod (3) exits the isolation cover (4), the closing cylinder (5) rotates to a position where all the through holes (401) are closed.

2. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 1, characterized in that: One end of the isolation cover (4) is closed, and the other end has an annular disk (402), and the annular disk (402) is fixedly arranged in close contact with the inner wall of the tower (1); the end of the closed cylinder (5) facing the inner wall of the tower (1) has an annular cover body (12), and the inner wall of one end of the annular cover body (12) is in rotationally fitting contact with the end face of the annular disk (402), and the other end is rotationally fittingly inserted into the cylinder wall of the tower (1).

3. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 2, characterized in that: The transmission assembly comprises an inner gear ring (11), a speed gear (10) and a driving gear (8) which mesh in sequence; the inner gear ring (11) is coaxially fixed to the other end of the annular cover (12); the speed gear (10) is rotatably mounted in the wall of the tower (1); and the driving gear (8) is mounted on the sample core rod (3).

4. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 3, characterized in that: The sample core rod (3) also coaxially comprises a stud section (7) and a sealing optical shaft section (6), wherein the stud section (7) is located between the sealing optical shaft section (6) and the driving gear (8), and the length of the sealing optical shaft section (6) must meet the following conditions: when the sample core rod (3) is rotationally inserted, the end face of the sealing optical shaft section (6) is in contact with the end face of the annular disk (402), the stud section (7) is screwed into the bottom, and at this time, the through holes (401) and the through holes (501) are aligned and connected one by one; when the sample core rod (3) is rotationally removed, the sealing optical shaft section (6) is completely out of contact with the wall of the tower tube (1), the sealing tube (5) covers and seals all the through holes (401), and the driving gear (8) is out of mesh with the speed change gear (10).

5. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 4, characterized in that: The length of the sealing optical shaft section (6) is equal to the axial length of the meshing between the driving gear (8) and the speed change gear (10) when the sample core rod (3) is inserted to the bottom.

6. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 4, characterized in that: An operating hand wheel (9) is coaxially fixed to one end of the driving gear (8) close to the outside of the tower (1), and the operating hand wheel (9) is rotated to drive the sample core rod (3) to rotate.

7. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 4, characterized in that: A guide rod (13) is coaxially fixed to the bottom of the isolation cover (4), and the guide rod (13) extends into the sample core rod (3) in an axially sliding manner. The length of the guide rod (13) is required to allow the guide rod (13) to extend outside the wall of the tower (1).

8. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 3, characterized in that: The outer side surface of the inner gear ring (11) is flush with the outer side surface of the annular cover body (12), and the inner tooth top surface thereof extends inwardly beyond the inner side surface of the annular cover body (12), and the inner gear ring (11) and the annular cover body (12) are fastened together by a plurality of fastening screws (14), and the fastening screws (14) are arranged parallel to the axial direction of the inner gear ring (11).

9. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 3, characterized in that: The inner gear ring (11) is pressed against one end of a plurality of locking rods (15) arranged in an annular array on one side facing the outer side of the tower (1). The locking rods (15) are arranged parallel to the axial direction of the inner gear ring (11), with the axial direction of the inner gear ring (11) as the central axis of the annular array. The other end of the locking rod (15) is connected to the end face of a pressure ring (17) via a pressure spring (16). The pressure ring (17) is axially pressed by a locking gland (18) threadedly sleeved on the outer wall of the tower (1) to fix the inner gear ring (11) and the closing cylinder (5).

10. The fluidized tower crystallization device for lithium carbonate crystallization and purification according to claim 2, characterized in that: The closed end of the closed tube (5) adjacent to the isolation cover (4) is also a closed structure; the sample core rod (3) is provided with a plurality of grooves, and the grooves are used to accommodate the growing lithium carbonate particles.

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