Continuous production device for preparing lithium carbonate through lithium hydroxide carbonization reaction and working method of continuous production device
By using a three-stage series vibrating fluidized bed structure and an adjustable height difference bed plate design, the problems of low efficiency and unevenness in the lithium carbonate drying process are solved, achieving efficient and low-energy continuous production, and improving product quality and equipment adaptability.
Patent Information
- Application Number
- CN202511806294.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-01-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing drying equipment is inefficient and energy-intensive in the preparation of lithium carbonate, which can easily lead to crystal breakage or agglomeration and uneven drying. In particular, for wet lithium carbonate products with high moisture content, blockage and fine powder can easily occur during the breakage process.
The three-stage series vibrating fluidized bed structure is divided into pre-drying, main drying and final drying stages. Through the adjustable height difference of the stepped bed plate and the rotating impact plate, combined with the air path control of different opening ratios, the material can be crushed by drop and uniformly fluidized and dried.
It improves drying efficiency and product quality, reduces energy consumption, avoids crystal breakage and agglomeration, achieves uniform product particle size and flowability, and reduces labor intensity and operating costs through continuous equipment operation.
Smart Images
Figure CN121360541A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of lithium compound production, and in particular to a continuous production device for preparing lithium carbonate through lithium hydroxide carbonization reaction and a working method thereof. BACKGROUND
[0002] Lithium carbonate is a key raw material for lithium battery positive electrode materials, and its physical properties (such as particle size distribution, fluidity, and water content) directly affect the performance and consistency of the battery. In the process of preparing lithium carbonate from lithium hydroxide carbonization, the lithium carbonate wet product obtained from the centrifuge usually has a high water content and is prone to form hard block-shaped objects.
[0003] Currently, disc dryers, compartment dryers, or ordinary fluidized bed dryers are commonly used in industry for processing. These devices have obvious deficiencies: disc and compartment dryers are operated intermittently or semi-continuously, have low efficiency, high energy consumption, and are prone to cause crystal breakage or agglomeration due to local overheating; ordinary fluidized bed dryers are prone to "dead bed" and "channeling" phenomena for lithium carbonate wet products with high initial moisture content and easy adhesion, resulting in uneven drying, and the internal of large pieces of material cannot be dried, which requires an additional crushing process, making the process complex, and the crushing process generates a large amount of fine powder, affecting the particle size distribution of the product. SUMMARY
[0004] The present application solves the problem of providing a continuous production device for preparing lithium carbonate through lithium hydroxide carbonization reaction and a working method thereof. The drying device adopts a three-stage series vibration fluidized bed structure, which scientifically divides the drying process into three stages of pre-drying, main drying, and final drying. The material is broken by the stepped bed plate with adjustable height difference, the gas path control is realized from strong penetration to uniform fluidization by the bed plate with different opening rates, and the active mechanical crushing and carding are realized by the rotatable material hitting plate, and finally the integration of drying, cooling, and grading is realized in the last stage.
[0005] In order to achieve the above purpose, the present application adopts the following technical solutions:
[0006] The application discloses a continuous production device for preparing lithium carbonate through lithium hydroxide carbonization reaction, which comprises a lithium hydroxide slurry preparation tank, a main reactor, an aging tank, a centrifuge and a drying device which are connected through pipelines and pumps in sequence, wherein the main reactor adopts a multi-stage series structure and comprises at least one pre-carbonization tower and one deep carbonization tower; the drying device comprises a pre-drying mechanism, a main drying mechanism and a final drying mechanism; the pre-drying mechanism comprises a first vibrating bin, the main drying mechanism comprises a second vibrating bin, and the final drying mechanism comprises a third vibrating bin; mounting seats are arranged outside the first vibrating bin, the second vibrating bin and the third vibrating bin; the mounting seats are connected with supporting seats through springs; air inlet pipes are arranged on the side walls of the first vibrating bin, the second vibrating bin and the third vibrating bin; air outlet pipes are arranged on the top of the first vibrating bin, the second vibrating bin and the third vibrating bin; a feeding port is formed in the first vibrating bin; a discharging port is formed in the bottom of the third vibrating bin; a first annular elastic connecting cloth is arranged between the first vibrating bin and the second vibrating bin; a second annular elastic connecting cloth is arranged between the second vibrating bin and the third vibrating bin; a bed body assembly with adjustable height difference is arranged in the first vibrating bin and the second vibrating bin; and a bed body assembly with fixed height is arranged in the third vibrating bin.
[0007] Preferably, the bed body assembly of the first vibrating bin comprises a first fixed plate, a first bed plate is fixedly arranged on the top side of the middle part of the first fixed plate, first air pressure cylinders are arranged at the bottoms of both ends of the first fixed plate, and the telescopic ends of the first air pressure cylinders are located at the top of the first fixed plate and connected with a second bed plate; a plurality of first guide rods penetrating through the first fixed plate are arranged on the bottom side of the second bed plate; and the installation heights of the first bed plate and the second bed plate in the first vibrating bin are sequentially reduced from a feeding end to a discharging end.
[0008] Preferably, the bed body assembly of the second vibrating bin comprises a second fixed plate, a third bed plate is fixedly arranged on the top side of the middle part of the second fixed plate, second air pressure cylinders are arranged at the bottoms of both ends of the second fixed plate, the telescopic ends of the second air pressure cylinders are located at the top of the second fixed plate and connected with a fourth bed plate, a plurality of second guide rods penetrating through the second fixed plate are arranged on the bottom side of the fourth bed plate, and the installation heights of the third bed plate and the fourth bed plate in the second vibrating bin are sequentially reduced from a feeding end to a discharging end.
[0009] Preferably, the bed body assembly of the third vibrating bin comprises a fifth bed plate, the fifth bed plate is horizontally arranged, and the opening rate of the fifth bed plate is between 50% and 70%.
[0010] Preferably, vibration motors are arranged in the first vibrating bin, the second vibrating bin and the third vibrating bin.
[0011] Preferably, the first bed plate, the second bed plate, the third bed plate and the fourth bed plate each comprise a horizontal section and a vertical section, the horizontal sections and the vertical sections of adjacent first bed plate and second bed plate, third bed plate and fourth bed plate are in contact with each other, and the horizontal section is provided with a sealing gasket at the end thereof;
[0012] The height difference between the adjacent first bed plate and second bed plate is between 100mm-200mm, and the opening rate of the first bed plate and the second bed plate is between 15%-30%;
[0013] The height difference between the adjacent third bed plate and fourth bed plate is between 20mm-80mm, and the opening rate of the third bed plate and the fourth bed plate is between 30%-50%.
[0014] Preferably, the first vibration bin and the second vibration bin are connected with a first connecting elastic cloth on both sides of the inner side, and the bottom end of the first connecting elastic cloth is connected with the adjacent second bed plate, fourth bed plate and top side of the first elastic connecting cloth, a first elastic connecting cloth is installed between the adjacent second bed plate and fourth bed plate, the second vibration bin and the third vibration bin are connected with a second connecting elastic cloth on both sides of the inner side, and the bottom end of the second connecting elastic cloth is connected with the adjacent fourth bed plate, fifth bed plate and top side of the second elastic connecting cloth, a second elastic connecting cloth is installed between the adjacent fourth bed plate and fifth bed plate.
[0015] Preferably, a plurality of rotating rods are rotatably installed in the first vibration bin and the second vibration bin, and a material hitting plate is installed on the rotating rod.
[0016] Preferably, a transmission box is installed on the outside of the first vibration bin and the second vibration bin, the rotating rod is installed with a main chain tooth in the transmission box, a plurality of slave chain teeth are installed in the transmission box, the slave chain tooth and the main chain tooth are connected through a transmission chain, a servo motor is installed on the transmission box, and the output end of the servo motor is connected with one of the main chain teeth.
[0017] A working method of a continuous production device for preparing lithium carbonate by lithium hydroxide carbonization reaction, the specific operation steps of the working method are as follows:
[0018] Step one: prepare lithium hydroxide slurry in a lithium hydroxide slurry preparation tank, pump the slurry into the main reactor of the main reactor for preliminary reaction, the slurry after preliminary reaction overflows into the deep carbonization tower for deep reaction until the reaction is complete, the slurry after deep reaction enters the aging tank for aging to promote crystal growth and transformation, the slurry after aging is separated by a solid-liquid centrifuge to obtain lithium carbonate wet product and mother liquor, the mother liquor is returned to the lithium hydroxide slurry preparation tank for reuse, and the lithium carbonate wet product is dried by a drying device to obtain lithium carbonate product;
[0019] Step two: the lithium carbonate wet product enters the first vibrating bin of the pre-drying mechanism through the feeding port, the height difference between the first bed plate and the second bed plate is adjusted by the first pneumatic cylinder, preparing for the subsequent impact crushing, the vibration motor at the bottom of the first vibrating bin is started, the whole pre-drying mechanism generates directional vibration, the lithium carbonate material jumps forward on the first bed plate, the high-temperature hot air is blown from the air inlet pipe of the side wall of the bin body, passes through the first bed plate and the second bed plate with low opening rate, at this time, due to the low opening rate, the airflow speed is very high, forming a "air arrow", impacting and piercing the wet material, when the lithium carbonate material falls from the end of the first bed plate to the second bed plate, the huge gap generates strong impact force, breaking the large lithium carbonate material, at the same time, the rotating material hitting plate in the bin is adjusted to the horizontal state under the action of the servo motor, crushing the initial large lump with large volume but loose structure, the high-temperature hot air contacts the surface of the fully exposed lithium carbonate material, rapidly evaporating the surface moisture of the lithium carbonate material;
[0020] Step three: the pre-crushed and preliminarily dried lithium carbonate material enters the second vibrating bin of the main drying mechanism through the first elastic connection cloth, the height difference between the third bed plate and the fourth bed plate is adjusted by the second pneumatic cylinder, to generate a gentle throwing and mixing effect, the vibration motor of the second vibrating bin works at different parameters, which is different from the pre-drying stage, so that the material enters a stable "boiling" fluidized state, the medium-temperature hot air enters from the air inlet pipe, passes through the bed plate with medium opening rate, providing uniform and stable airflow, the material is fully mixed in the fluidized state, the internal moisture continuously and uniformly migrates to the surface and evaporates, completing the core dehydration process, at this time, the rotating material hitting plate is adjusted to be close to the bed body under the action of the servo motor, intercepting and impacting the thrown particles and small lumps, and shearing and combing the material layer;
[0021] Step four: the basically dried lithium carbonate particles enter the third vibrating bin of the final drying mechanism through the second elastic connection cloth, the vibration motor of the third vibrating bin works in a high-frequency and small-amplitude mode, ensuring that the material is stably and quickly conveyed to the discharge port, the airflow speed is reduced due to the high opening rate, the low-speed airflow can gently take away the last residual moisture, and the "airflow classification" effect is realized, the completely dried, light and fine powder is lifted by the airflow and enters the subsequent dust removal system through the air outlet pipe, and the lithium carbonate product meeting the specification and uniform in particle size continues to move forward along the bed plate.
[0022] The beneficial effects of the present application are:
[0023] The drying efficiency is high, the adaptability is strong, the three-stage segmented design optimizes the processing of the material under different moisture contents, especially the "air arrow" impact and drop crushing in the pre-drying stage, which can efficiently process the initial material with high moisture and easy caking, solving the problems of easy blocking and uneven drying of traditional equipment.
[0024] Good product physical index: through the combination of adjustable height difference and rotatable impact plate, the "precise crushing" of material agglomeration is realized, over crushing is avoided, the main crystal is protected, the airflow classification effect in the final drying stage makes the product particle size more uniform and the fluidity better;
[0025] Low energy consumption and high degree of continuity: the entire drying process is completely continuous, hot air is supplied in segments as needed, the heat energy utilization rate is high, the equipment integration degree is high, automatic operation significantly reduces labor intensity and operating cost;
[0026] Flexible operation: the height difference of each stage bed plate can be flexibly adjusted through the air cylinder, and the angle and speed of the impact plate can be changed through the servo motor, so that different initial state materials can be adapted, and the process flexibility is large. BRIEF DESCRIPTION OF DRAWINGS
[0027] Fig. 1 It is a first structure schematic diagram of the whole application;
[0028] Fig. 2 It is a second structure schematic diagram of the whole application;
[0029] Fig. 3 It is a schematic diagram of the internal structure of the application;
[0030] Fig. 4 It is a schematic diagram of the installation structure of the main chain tooth and the slave chain tooth.
[0031] LEGEND:
[0032] 1, pre-drying mechanism; 2, main drying mechanism; 3, final drying mechanism; 4, first vibrating bin; 5, second vibrating bin; 6, third vibrating bin; 7, mounting seat; 8, spring; 9, support seat; 10, air inlet pipe; 11, air outlet pipe; 12, feed inlet; 13, discharge outlet; 14, first annular elastic connection cloth; 15, second annular elastic connection cloth; 16, first fixed plate; 17, first bed plate; 18, second bed plate; 19, first air cylinder; 20, second fixed plate; 21, third bed plate; 22, fourth bed plate; 23, second air cylinder; 24, fifth bed plate; 25, vibrating motor; 26, first connecting elastic baffle cloth; 27, first elastic connection cloth; 28, second connecting elastic baffle cloth; 29, second elastic connection cloth; 30, rotating rod; 31, impact plate; 32, transmission box; 33, servo motor; 34, main chain tooth; 35, slave chain tooth; 36, transmission chain. DETAILED DESCRIPTION
[0033] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0034] The specific embodiments are given below.
[0035] Referring to Figs. 1-4 A continuous production device for preparing lithium carbonate by lithium hydroxide carbonization reaction, comprising a lithium hydroxide slurry preparation tank, a main reactor, an aging tank, a centrifuge and a drying device connected in sequence through pipelines and pumps, the main reactor adopts a multi-stage series structure and comprises at least one pre-carbonization tower and one deep carbonization tower;
[0036] The drying device comprises a pre-drying mechanism 1, a main drying mechanism 2 and a final drying mechanism 3. The pre-drying mechanism 1 comprises a first vibrating bin 4, the main drying mechanism 2 comprises a second vibrating bin 5, and the final drying mechanism 3 comprises a third vibrating bin 6. An installation seat 7 is installed outside the first vibrating bin 4, the second vibrating bin 5 and the third vibrating bin 6. The installation seat 7 is connected with a support seat 9 through a spring 8. An air inlet pipe 10 is installed on the side wall of the first vibrating bin 4, the second vibrating bin 5 and the third vibrating bin 6. An air outlet pipe 11 is installed on the top of the first vibrating bin 4, the second vibrating bin 5 and the third vibrating bin 6. A feeding port 12 is formed on the first vibrating bin 4. A discharging port 13 is formed on the bottom of the third vibrating bin 6. A first annular elastic connecting cloth 14 is installed between the first vibrating bin 4 and the second vibrating bin 5. A second annular elastic connecting cloth 15 is installed between the second vibrating bin 5 and the third vibrating bin 6. Through the three-stage series vibrating bin structure and the elastic connection design, the modularization and continuous operation of the drying process are realized. The vibrating bins are independently supported and flexibly connected, which ensures the independence of vibration and the continuity of material conveying. The reasonable arrangement of the air inlet pipe 10 and the air outlet pipe 11 provides an independently controllable airflow environment for each drying stage, which lays a foundation for the accurate stage-by-stage drying of the material.
[0037] The first vibrating bin 4 and the second vibrating bin 5 are provided with bed body assemblies with adjustable height difference, and the third vibrating bin 6 is provided with a bed body assembly with fixed height. The bed body assembly of the first vibrating bin 4 comprises a first fixed plate 16, the top side of which is fixedly provided with a first bed plate 17 in the middle, and the bottom of each end of the first fixed plate 16 is provided with a first pneumatic cylinder 19, and the telescopic end of the first pneumatic cylinder 19 is connected to the top of the first fixed plate 16 and the second bed plate 18. The bottom side of the second bed plate 18 is provided with a plurality of first guide rods penetrating through the first fixed plate 16. The installation height of the first bed plate 17 and the second bed plate 18 in the first vibrating bin 4 decreases from the feeding end to the discharging end. The bed body assembly of the second vibrating bin 5 comprises a second fixed plate 20, the top side of which is fixedly provided with a third bed plate 21 in the middle, and the bottom of each end of the second fixed plate 20 is provided with a second pneumatic cylinder 23, and the telescopic end of the second pneumatic cylinder 23 is connected to the top of the second fixed plate 20 and the fourth bed plate 22. The bottom side of the fourth bed plate 22 is provided with a plurality of second guide rods penetrating through the second fixed plate 20. The installation height of the third bed plate 21 and the fourth bed plate 22 in the second vibrating bin 5 decreases from the feeding end to the discharging end. The bed body assembly of the third vibrating bin 6 comprises a fifth bed plate 24. A vibrating motor 25 is arranged in each of the first vibrating bin 4, the second vibrating bin 5 and the third vibrating bin 6. The bed plate is designed in a stepped form with adjustable height, so as to accurately control the material conveying speed and the falling height. The height difference of the first two sections creates good material crushing conditions, and the horizontal bed plate of the last section ensures the stable conveying of the material. The arrangement of the vibrating motor 25 keeps the material in a fluidized state, which significantly improves the drying efficiency and uniformity. The segmented and adjustable bed body structure makes the drying device adapt to the processing requirements of different materials.
[0038] The first bed plate 17, the second bed plate 18, the third bed plate 21 and the fourth bed plate 22 each comprise a horizontal section and a vertical section. The horizontal section and the vertical section of adjacent first bed plate 17 and second bed plate 18, third bed plate 21 and fourth bed plate 22 are in contact with each other, and the end of the horizontal section is provided with a sealing gasket.
[0039] The height difference between the adjacent first bed plate 17 and the second bed plate 18 is between 100mm-200mm, and the open hole rate of the first bed plate 17 and the second bed plate 18 is between 15%-30%, the height difference between the adjacent third bed plate 21 and the fourth bed plate 22 is between 20mm-80mm, and the open hole rate of the third bed plate 21 and the fourth bed plate 22 is between 30%-50%, the fifth bed plate 24 is horizontally arranged, and the open hole rate is between 50%-70%, through the optimization design of the bed plate structure and the accurate control of the parameter configuration, the staged accurate control of the drying process is realized, the large height difference and the low open hole rate of the front section form the strong crushing zone and the high-speed airflow zone; the moderate parameters of the middle section create a stable fluidized drying environment; the high open hole rate of the end section ensures the uniform drying and effective classification of the material, and the gradual parameter design makes the whole drying process more scientific and reasonable, and significantly improves the product quality.
[0040] The first connecting elastic cloth 26 is connected to the inner sides of the first vibrating bin 4 and the second vibrating bin 5, and the bottom end of the first connecting elastic cloth 26 is connected to the top side of the adjacent second bed plate 18, fourth bed plate 22 and first elastic connecting cloth 27, the first elastic connecting cloth 27 is installed between the adjacent second bed plate 18 and fourth bed plate 22, the second connecting elastic cloth 28 is connected to the inner sides of the second vibrating bin 5 and the third vibrating bin 6, and the bottom end of the second connecting elastic cloth 28 is connected to the top side of the adjacent fourth bed plate 22, fifth bed plate 24 and second elastic connecting cloth 29, the second elastic connecting cloth 29 is installed between the adjacent fourth bed plate 22 and fifth bed plate 24, a full-range elastic sealing system is adopted, which effectively prevents the leakage and airflow short circuit phenomenon of the material in the conveying process, the combination design of the elastic cloth and the connecting cloth not only adapts to the vibration characteristics of the equipment, but also ensures the sealing between the cabins, provides guarantee for creating a stable drying environment, and avoids cross contamination and energy loss of the material.
[0041] A plurality of rotating rods 30 are rotatably installed in the first vibrating bin 4 and the second vibrating bin 5, the rotating rods 30 are installed with a material hitting plate 31, a transmission box 32 is installed outside the first vibrating bin 4 and the second vibrating bin 5, the rotating rods 30 are installed with main chain teeth 34 in the transmission box 32, a plurality of slave chain teeth 35 are installed in the transmission box 32, and the slave chain teeth 35 and the main chain teeth 34 are drivingly connected through a transmission chain 36, a servo motor 33 is installed on the transmission box 32, and the output end of the servo motor 33 is connected with one of the main chain teeth 34, the innovative material hitting plate 31 system realizes synchronous operation through precise chain transmission, which can effectively crush material agglomerates and break up agglomerates, significantly increasing the specific surface area of the material, the use of the servo motor 33 enables the angle and rotating speed of the material hitting plate 31 to be adjusted in real time according to the material state, realizing active intervention on the material state, and further improving the drying efficiency and the stability of the product quality.
[0042] Working principle: lithium hydroxide slurry is prepared in a lithium hydroxide slurry preparation tank, the slurry is pumped into a pre-carbonization tower of a main reactor of the main reactor for preliminary reaction, the slurry after the preliminary reaction is overflowed into a deep carbonization tower for deep reaction until the reaction is complete, the slurry after the deep reaction is poured into an aging tank for aging to promote crystal growth and transformation, the slurry after the aging is separated by a solid-liquid centrifuge to obtain lithium carbonate wet product and mother liquor, the mother liquor is returned to the lithium hydroxide slurry preparation tank for reuse, and the lithium carbonate wet product is dried by a drying device to obtain lithium carbonate product;
[0043] The lithium carbonate wet product enters the first vibrating bin 4 of the pre-drying mechanism 1 through the feeding port 12, the height difference between the first bed plate 17 and the second bed plate 18 is adjusted by the first pneumatic cylinder 19 to prepare for subsequent impact crushing, the vibration motor 25 at the bottom of the first vibrating bin 4 is started to drive the entire pre-drying mechanism 1 to produce directional vibration, so that the lithium carbonate material jumps forward on the first bed plate 17, high-temperature hot air is blown from the air inlet pipe 10 on the side wall of the bin body, and passes through the first bed plate 17 and the second bed plate 18 with low opening rate, at this time, due to the low opening rate, the airflow speed is very high, forming a “air arrow”, which impacts and pierces the wet material, when the lithium carbonate material falls from the end of the first bed plate 17 to the second bed plate 18, the huge gap generates strong impact force to break the large lithium carbonate material, at the same time, the rotary material hitting plate 31 in the bin is adjusted to a horizontal state under the action of the servo motor 33, and the initial large lump with large volume but loose structure is processed, and the caked lithium carbonate material is crushed, the high-temperature hot air contacts the surface of the fully exposed lithium carbonate material to rapidly evaporate the surface moisture of the lithium carbonate material;
[0044] The pre-crushed and preliminarily dried lithium carbonate material enters the second vibrating bin 5 of the main drying mechanism 2 through the first elastic connection cloth 27, the height difference between the third bed plate 21 and the fourth bed plate 22 is adjusted by the second pneumatic cylinder 23 to produce a gentle throwing and mixing effect, the vibration motor 25 of the second vibrating bin 5 works at different parameters, which is different from the pre-drying stage, so that the material enters a stable “boiling” fluidized state, medium-temperature hot air enters from the air inlet pipe 10, passes through the bed plate with medium opening rate, and provides uniform and stable airflow, the material is fully mixed in the fluidized state, the internal moisture continuously and uniformly migrates to the surface and evaporates, and the core dehydration process is completed, at this time, the rotary material hitting plate 31 is adjusted to be close to the bed body under the action of the servo motor 33, the thrown particles and small lumps are intercepted and impacted, and the material layer is sheared and combed;
[0045] The substantially dry lithium carbonate particles enter the third vibrating bin 6 of the final drying mechanism 3 smoothly through the second elastic connection cloth 29, the vibrating motor 25 of the third vibrating bin 6 works in a high frequency and small amplitude mode, ensuring that the material is smoothly and quickly transported to the discharge port 13, the speed of the air flow is reduced due to the high open rate, the low speed air flow can gently take away the last residual moisture, and the "air flow classification" effect is realized, the completely dried, light and fine powder is lifted by the air flow and enters the subsequent dust removal system through the air outlet pipe 11, and the lithium carbonate product meeting the specification and having uniform particles continues to move forward along the bed plate.
[0046] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A continuous production device for producing lithium carbonate by lithium hydroxide carbonation reaction, characterized in that, The application relates to a lithium hydroxide slurry preparation device, which comprises a lithium hydroxide slurry preparation tank, a main reactor, an aging tank, a centrifuge and a drying device connected in sequence through pipes and pumps, the main reactor adopts a multi-stage series structure and comprises at least one pre-carbonization tower and one deep carbonization tower, the drying device comprises a pre-drying mechanism (1), a main drying mechanism (2) and a final drying mechanism (3), the pre-drying mechanism (1) comprises a first vibrating bin (4), the main drying mechanism (2) comprises a second vibrating bin (5), the final drying mechanism (3) comprises a third vibrating bin (6), mounting seats (7) are mounted outside the first vibrating bin (4), the second vibrating bin (5) and the third vibrating bin (6), the mounting seats (7) are connected with supporting seats (9) through springs (8), air inlet pipes (10) are mounted on the side walls of the first vibrating bin (4), the second vibrating bin (5) and the third vibrating bin (6), air outlet pipes (11) are mounted on the top of the first vibrating bin (4), the second vibrating bin (5) and the third vibrating bin (6), a feeding port (12) is formed in the first vibrating bin (4), a discharging port (13) is formed in the bottom of the third vibrating bin (6), a first annular elastic connecting cloth (14) is arranged between the first vibrating bin (4) and the second vibrating bin (5), a second annular elastic connecting cloth (15) is arranged between the second vibrating bin (5) and the third vibrating bin (6), a height-adjustable bed body assembly is arranged in the first vibrating bin (4) and the second vibrating bin (5), and a fixed-height bed body assembly is arranged in the third vibrating bin (6).
2. The continuous production device for lithium carbonate prepared by lithium hydroxide carbonation reaction according to claim 1, characterized in that, The bed body assembly of the first vibrating bin (4) comprises a first fixed plate (16), a first bed plate (17) is fixedly mounted on the top side of the first fixed plate (16), first air pressure cylinders (19) are mounted at the bottoms of both ends of the first fixed plate (16), and the telescopic ends of the first air pressure cylinders (19) are connected with a second bed plate (18) on the top of the first fixed plate (16), a plurality of first guide rods penetrating through the first fixed plate (16) are mounted on the bottom side of the second bed plate (18), and the installation heights of the first bed plate (17) and the second bed plate (18) in the first vibrating bin (4) are gradually reduced from a feeding end to a discharging end.
3. The continuous production device for lithium carbonate prepared by lithium hydroxide carbonation reaction according to claim 2, characterized in that, The bed body assembly of the second vibrating bin (5) comprises a second fixed plate (20), a third bed plate (21) is fixedly mounted on the top side of the second fixed plate (20), second air pressure cylinders (23) are mounted at the bottoms of both ends of the second fixed plate (20), the telescopic ends of the second air pressure cylinders (23) are connected with a fourth bed plate (22) on the top of the second fixed plate (20), a plurality of second guide rods penetrating through the second fixed plate (20) are mounted on the bottom side of the fourth bed plate (22), and the installation heights of the third bed plate (21) and the fourth bed plate (22) in the second vibrating bin (5) are gradually reduced from a feeding end to a discharging end.
4. The continuous production device for lithium carbonate prepared by lithium hydroxide carbonation reaction according to claim 3, characterized in that, The bed body assembly of the third vibrating bin (6) comprises a fifth bed plate (24), the fifth bed plate (24) is horizontally arranged, and the aperture rate is between 50% and 70%.
5. The continuous production device for lithium carbonate prepared by lithium hydroxide carbonation reaction according to claim 4, characterized in that, Vibration motor (25) is installed in the first vibration bin (4), second vibration bin (5) and third vibration bin (6).
6. The continuous production device for lithium carbonate prepared by lithium hydroxide carbonation reaction according to claim 5, characterized in that, The first bed plate (17), the second bed plate (18), the third bed plate (21) and the fourth bed plate (22) each include a horizontal section and a vertical section, the horizontal sections and the vertical sections of adjacent first bed plate (17) and second bed plate (18), third bed plate (21) and fourth bed plate (22) are in contact with each other, and the horizontal section end is provided with a sealing pad. The height difference between adjacent first bed plate (17) and second bed plate (18) is between 100mm-200mm, and the opening rate of first bed plate (17) and second bed plate (18) is between 15%-30%. The height difference between adjacent third bed plate (21) and fourth bed plate (22) is between 20mm-80mm, and the opening rate of third bed plate (21) and fourth bed plate (22) is between 30%-50%.
7. The continuous production device for lithium carbonate by lithium hydroxide carbonation reaction according to claim 6, characterized in that, The first vibration bin (4) and the second vibration bin (5) are connected with the first connecting elastic cloth (26) on both sides, and the bottom end of the first connecting elastic cloth (26) is connected with the adjacent second bed plate (18), fourth bed plate (22) and first elastic connecting cloth (27) top side, and the first elastic connecting cloth (27) is installed between the adjacent second bed plate (18) and fourth bed plate (22), and the second vibration bin (5) and third vibration bin (6) are connected with the second connecting elastic cloth (28) on both sides, and the bottom end of the second connecting elastic cloth (28) is connected with the adjacent fourth bed plate (22), fifth bed plate (24) and second elastic connecting cloth (29) top side, and the second elastic connecting cloth (29) is installed between the adjacent fourth bed plate (22) and fifth bed plate (24). 8.The continuous production device for lithium carbonate prepared by lithium hydroxide carbonation reaction according to claim 7, characterized in that, A plurality of rotating rods (30) are rotatably installed in the first vibration bin (4) and the second vibration bin (5), and a material hitting plate (31) is installed on the rotating rod (30).
9. The continuous production apparatus for lithium carbonate by lithium hydroxide carbonation reaction according to claim 8, characterized in that, A transmission box (32) is installed on the outside of the first vibration bin (4) and the second vibration bin (5), a main chain tooth (34) is installed in the transmission box (32), a plurality of slave chain teeth (35) are installed in the transmission box (32), and the slave chain teeth (35) and the main chain tooth (34) are drivingly connected through a transmission chain (36), a servo motor (33) is installed on the transmission box (32), and the output end of the servo motor (33) is connected with one of the main chain teeth (34).
10. The working method of the continuous production device for lithium carbonate produced by lithium hydroxide carbonation reaction according to claim 9, characterized in that, The specific operation steps of the working method are as follows: Step one: prepare lithium hydroxide slurry in lithium hydroxide slurry preparation tank, pump the slurry into the pre-carbonization tower of the main reactor for preliminary reaction, overflow the slurry after preliminary reaction into the deep carbonization tower for deep reaction until the reaction is complete, then the slurry after deep reaction is put into the aging tank for aging to promote crystal growth and transformation, the slurry after aging is separated by solid-liquid centrifuge to obtain lithium carbonate wet product and mother liquor, the mother liquor is returned to the lithium hydroxide slurry preparation tank for reuse, and the lithium carbonate wet product is dried by a drying device to obtain lithium carbonate product; Step two: lithium carbonate wet product enters the first vibrating bin (4) of the pre-drying mechanism (1) through the feed port (12), the height difference between the first bed plate (17) and the second bed plate (18) is adjusted by the first pneumatic cylinder (19) to prepare for subsequent impact crushing, the vibrating motor (25) at the bottom of the first vibrating bin (4) is started to drive the entire pre-drying mechanism (1) to produce directional vibration, making the lithium carbonate material jump forward on the first bed plate (17), and the high-temperature hot air is blown into the bin body side wall from the air inlet pipe (10), passing through the first bed plate (17) and the second bed plate (18) with low opening rate, at this time, due to the low opening rate, the airflow speed is very high, forming "air arrow", impacting and piercing the wet material, when the lithium carbonate material falls from the end of the first bed plate (17) to the second bed plate (18), the huge gap produces strong impact force, breaking up the large lithium carbonate material, at the same time, the rotating material hitting plate (31) in the bin is adjusted to the horizontal state under the action of the servo motor (33), processing the initial large lump with large volume but loose structure, crushing the caked lithium carbonate material, the high-temperature hot air contacts the fully exposed lithium carbonate material surface, rapidly evaporating the surface moisture; Step three: the pre-crushed and initially dried lithium carbonate material enters the second vibrating bin (5) of the main drying mechanism (2) through the first elastic connection cloth (27), the height difference between the third bed plate (21) and the fourth bed plate (22) is adjusted by the second pneumatic cylinder (23) to produce a gentle throwing and mixing effect, the vibrating motor (25) of the second vibrating bin (5) works at different parameters, distinguishing from the pre-drying stage, making the material enter a stable "boiling" fluidized state, medium-temperature hot air enters from the air inlet pipe (10), passing through the bed plate with medium opening rate, providing uniform and stable airflow, the material is fully mixed in the fluidized state, the internal moisture continuously and uniformly migrates to the surface and evaporates, completing the core dehydration process, at this time, the rotating material hitting plate (31) is adjusted to be close to the bed body under the action of the servo motor (33), intercepting and impacting the thrown particles and small lumps, and shearing and combing the material layer; Step four: the basically dried lithium carbonate particles enter the third vibrating bin (6) of the final drying mechanism (3) smoothly through the second elastic connection cloth (29), the vibrating motor of the third vibrating bin (6) works in a high-frequency and small-amplitude mode to ensure that the material is smoothly and quickly conveyed to the discharge port (13), the airflow speed is reduced due to the high opening rate, the low-speed airflow can gently remove the last residual moisture and achieve the "airflow classification" effect, the completely dried, light and fine powder is lifted by the airflow and enters the subsequent dust removal system through the air outlet pipe (11), and the lithium carbonate product that meets the specification requirements and has uniform particles continues to move forward along the bed plate.