CN211521613U

CN211521613U - Battery level lithium carbonate preparation facilities

Info

Publication number: CN211521613U
Application number: CN201922384519.5U
Authority: CN
Inventors: 周伟; 徐继胜
Original assignee: Hefei Tiansheng Lithium Technology Co ltd
Current assignee: Hefei Tiansheng Lithium Technology Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-18
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to a lithium carbonate preparation technical field just discloses a battery level lithium carbonate preparation facilities, comprising a base plate, the top fixed mounting of bottom plate has the stabilizer blade, the top fixed mounting of stabilizer blade has the backup pad. This battery level lithium carbonate preparation method and preparation facilities, setting through first motor, make the bull stick at the bearing internal rotation, thereby drive the stirring board and rotate, through the second motor, first transmission tooth post, second transmission tooth post and driving belt's setting, make the carousel rotate, the stirring board in the bull stick outside and the poking bar relative rotation in the scraper blade outside, drive inside thick liquids and produce relative impact force, make the stirring more even, and perpendicular rotor plate is when following poking bar horizontal rotation, the pressure that receives thick liquids spins is rotation on the vertical direction, thereby to stirring on the vertical direction, also scrape down with the solid-state thick liquids that adhere to on the hydrogenation cauldron inner wall when the scraper blade is rotatory and fully react with carbon dioxide, the abundant mesh of stirring has been reached.

Description

Battery level lithium carbonate preparation facilities

Technical Field

The utility model relates to a lithium carbonate preparation technical field specifically is a battery level lithium carbonate preparation facilities.

Background

Lithium carbonate is widely applied to the fields of glass ceramics, new energy automobiles, alloys, medicines and the like, in recent years, with the advocation of low-carbon and environment-friendly guidelines in China, the new energy industry is rapidly developed, the lithium battery industry is the most remarkable to be rapidly increased, most of positive electrode materials such as lithium cobaltate, lithium nickelate, lithium nickel cobaltate, lithium iron phosphate, lithium nickel cobalt manganese oxide and the like are prepared by taking lithium carbonate as a raw material, so that the demand of the lithium carbonate is increased day by day, the application field is also expanded continuously, however, the purity of the lithium carbonate is higher and higher, the cost for producing industrial lithium carbonate is low, the yield is high, and therefore, the method for directly preparing battery-grade lithium carbonate by taking industrial lithium carbonate.

Various current battery-grade lithium carbonate preparation devices are disclosed, for example, in chinese patent CN 106745100B, a system for preparing battery-grade lithium carbonate is disclosed, the preparation system includes a hydrogenation kettle, an impurity remover, a filter and a decomposer, the hydrogenation kettle is used for reacting crude lithium carbonate slurry with carbon dioxide to obtain a primary hydrogenated liquid, the impurity remover is connected to the overflow port for removing impurities in the primary hydrogenated liquid to obtain an impurity-removed hydrogenated liquid, the filter is connected to an outlet pipe of the impurity remover for filtering the impurity-removed hydrogenated liquid to obtain a filtrate, the decomposer is connected to a liquid discharge port of the filter for thermally decomposing the filtrate to obtain decomposed lithium carbonate, the preparation system can realize continuous production of battery-grade lithium carbonate, shorten production flow, reduce energy consumption, and provide a method for preparing battery-grade lithium carbonate, but when the preparation system performs hydrogenation reaction, the stirring is too simple, so that the hydrogenation reaction is not sufficient, and part of slurry possibly adheres to the inner wall of the reaction kettle in the stirring process and cannot complete the hydrogenation reaction, so that the stirring is not sufficient at all, and the preparation system obtains lithium carbonate after completing the decomposition reaction, but the lithium carbonate after decomposition can further undergo a causticization reaction to obtain lithium carbonate with higher purity, so that the preparation purity of the preparation system is not high enough.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a battery level lithium carbonate preparation facilities, possess the abundant and high advantage of preparation purity of stirring, solved this preparation system and when carrying out hydrogenation reaction, the stirring is too simple, it is abundant inadequately to lead to hydrogenation reaction, and the stirring in-process probably has partial thick liquids to adhere to reation kettle's inner wall and can't accomplish hydrogenation reaction, consequently, the stirring is abundant inadequately at all, and this preparation system just obtained the lithium carbonate after accomplishing decomposition reaction, but lithium carbonate after the decomposition can also further carry out causticization, obtain the higher lithium carbonate of purity, so the preparation purity of this preparation system problem also not high enough.

(II) technical scheme

In order to realize the purposes of fully stirring and high preparation purity, the utility model provides a following technical scheme: a battery-grade lithium carbonate preparation device comprises a base plate, the top fixed mounting of bottom plate has the stabilizer blade, the top fixed mounting of stabilizer blade has the backup pad, the top fixed mounting of backup pad has hydrogenation cauldron, the left side fixed mounting at hydrogenation cauldron top has the breather pipe, the right side fixed mounting at hydrogenation cauldron top has the inlet pipe, the top of hydrogenation cauldron just is located fixed mounting between the relative one side of breather pipe and inlet pipe and has the motor cover, the inside fixed mounting of motor cover has first motor, the output fixed mounting of first motor has the bull stick that is located hydrogenation cauldron inside, the outside movable mounting of bull stick has the bearing that is located hydrogenation cauldron inner chamber roof, the bottom in the bull stick outside just is located the diapire movable mounting of hydrogenation cauldron inner chamber and has the carousel, the bottom fixed mounting of carousel has first transmission tooth post, the bottom of the first transmission tooth column penetrates through the hydrogenation reaction kettle and the support plate and extends to the bottom of the support plate, a rotating belt is meshed with the outer side of the first transmission tooth column, a second transmission tooth column is meshed with the inner side of one end, far away from the first transmission tooth column, of the transmission belt, a second motor is fixedly mounted at the top of the second transmission tooth column and located at the top of the support plate, scraping plates are fixedly mounted on the left side and the right side of the top of the rotary table, stirring plates are fixedly mounted on the outer side of the rotary table, stirring rods are fixedly mounted on the opposite sides of the scraping plates, a vertical rotary plate is movably mounted on the outer side of the stirring rods, a transmission pipe is fixedly mounted on the right side of the hydrogenation reaction kettle, a first filter screen is fixedly mounted inside the transmission pipe, a valve is fixedly mounted on the outer side of the transmission pipe and located on the right side of the first filter screen, and a, the one end that hydrogenation reation kettle was kept away from to the transmission pipe runs through the water pump and extends to the right side of water pump, the one end fixedly connected with that hydrogenation reation kettle was kept away from to the transmission pipe is located the decomposition cauldron at bottom plate top, the equal fixed mounting in the left and right sides of decomposition cauldron has the heater, the bottom fixed mounting of decomposition cauldron has the discharging pipe, the inside movable mounting of discharging pipe has the second filter screen, the top of bottom plate and the right side fixed mounting that is located the decomposition cauldron have a compression cauldron, the left side fixed mounting of compression cauldron has the feed liquor pipe, the right side fixed mounting of compression cauldron has the pressure boost valve.

Preferably, the hydrogenation reaction kettle is a cylinder with a hollow inner part, and the outer diameter of the rotary disc is matched with the inner diameter of the hydrogenation reaction kettle.

Preferably, a round hole is formed in the top of the rotating disc, and the diameter of the round hole is matched with that of the rotating rod.

Preferably, the scraper is a cuboid, and the top of the scraper extends to the top wall of the inner cavity of the hydrogenation reaction kettle.

Preferably, the number of the stirring plates is fourteen, and the fourteen stirring plates are uniformly distributed on the outer side of the rotating rod.

Preferably, the number of the stirring rods is twelve, and six stirring rods are fixedly mounted on the opposite sides of the two scraping plates.

Preferably, the stirring rods and the stirring plates are arranged in a crossed manner, and the height of the vertical rotating plate is smaller than the distance between the two stirring plates.

Preferably, one end of the conveying pipe close to the hydrogenation reaction kettle penetrates through the right side of the hydrogenation reaction kettle and extends to the inside of the hydrogenation reaction kettle, and one end of the conveying pipe close to the decomposition kettle penetrates through the top of the decomposition kettle and extends to the inside of the decomposition kettle.

The utility model discloses another technical problem that solves is a preparation method of battery level lithium carbonate, including following step:

1) mixing industrial-grade lithium carbonate and water according to a certain proportion to prepare slurry, introducing the slurry into a hydrogenation reaction kettle through a feed pipe, and then introducing carbon dioxide into the reaction kettle through a vent pipe;

2) the first motor is started, the rotating rod rotates in the bearing, so that the stirring plate is driven to rotate, the second motor is started, the second transmission toothed column rotates, the first transmission toothed column further rotates through the transmission belt, finally, the rotary disc rotates in an autorotation mode, the rotating direction is opposite to that of the rotating rod, the scraping plate at the top of the rotary disc also rotates along with the second transmission toothed column, the stirring plate on the outer side of the rotating rod and the stirring rod on the outer side of the scraping plate rotate relatively, the slurry in the rotary rod is driven to generate relative impact force, stirring is more uniform, the vertical rotary plate rotates in the vertical direction under the pressure of the slurry while rotating horizontally along with the stirring rod, stirring in the vertical direction is achieved, the solid slurry attached to the inner wall of the hydrogenation reaction kettle is scraped off when the scraping plate rotates, the solid slurry is fully reacted with carbon dioxide, and uneven stirring is prevented;

3) obtaining a lithium bicarbonate solution after the hydrogenation reaction in the step 2), opening a valve and enabling a water pump to work, enabling the lithium bicarbonate solution to flow along a conveying pipe under the action of the water pump, and filtering by a first filter screen to obtain a pure lithium bicarbonate solution to enter a decomposition kettle;

4) after the lithium bicarbonate solution prepared in the step 2) completely enters the decomposition kettle, opening a heater to heat the decomposition kettle, wherein the temperature is ninety-one hundred ℃, lithium bicarbonate decomposes into generally pure solid lithium carbonate at high temperature, and liquid waste residue is filtered through a second filter screen;

5) adding calcium hydroxide into the decomposition kettle to keep the temperature in the decomposition kettle between ninety ℃ and one hundred ℃, and carrying out causticization reaction on the calcium hydroxide and the solid lithium carbonate prepared in the step 4) to generate lithium hydroxide;

6) filtering and cleaning the lithium hydroxide solution prepared in the step 5) to obtain a filtrate, transferring the filtrate into a compression kettle, and obtaining a concentrated solution under the action of a pressurization valve;

7) and finally, removing impurities such as calcium, magnesium and the like from the concentrated solution prepared in the step 6) through plasma exchange resin, introducing carbon dioxide into the concentrated solution at high temperature for reaction, filtering, and drying the obtained filter residue to obtain pure battery-grade lithium carbonate.

(III) advantageous effects

Compared with the prior art, the utility model provides a battery level lithium carbonate preparation facilities possesses following beneficial effect:

1. this battery level lithium carbonate preparation facilities, setting through first motor, make the bull stick at the bearing internal rotation, thereby drive the stirring board and rotate, through the second motor, first transmission tooth post, second transmission tooth post and driving belt's setting, make the carousel rotate, the stirring rod relative rotation in the stirring board and the scraper blade outside in the bull stick outside, drive inside thick liquids and produce relative impact force, make the stirring more even, and perpendicular rotor plate is when following stirring rod horizontal rotation, the pressure that receives the thick liquids rotates on the vertical direction, thereby to stirring on the vertical direction, and also scrape down with the hydrogenation cauldron inner wall adnexed solid state thick liquids when the scraper blade is rotatory and fully react with carbon dioxide, the abundant mesh of stirring has been reached.

2. The battery-level lithium carbonate preparation device comprises a decomposition kettle, wherein primary pure lithium carbonate is obtained after lithium bicarbonate is subjected to high-temperature decomposition through the arrangement of the decomposition kettle, liquid waste residues are filtered out through a second filter screen, calcium hydroxide is added into the decomposition kettle, the temperature in the kettle is kept between ninety ℃ and one hundred ℃, calcium hydroxide and solid lithium carbonate are subjected to causticization reaction to generate lithium hydroxide, lithium hydroxide solution is subjected to multi-filtration and cleaning to filtrate, the filtrate is transferred into a compression kettle, a concentrated solution is obtained under the action of a pressurization valve, impurities such as calcium, magnesium and the like are removed from the concentrated solution through plasma exchange resin, the concentrated solution is subjected to carbon dioxide reaction at high temperature and then is filtered, filter residues are dried, pure battery-level lithium carbonate can be obtained, the battery-level lithium carbonate is subjected to causticization reaction, and more impurities are removed in the process, the lithium carbonate is purer, and the purpose of high preparation purity is achieved.

Drawings

Fig. 1 is a schematic structural view of a preparation method and a preparation apparatus for battery-grade lithium carbonate provided by the present invention.

In the figure: 1 bottom plate, 2 support legs, 3 support plates, 4 hydrogenation reaction kettles, 5 vent pipes, 6 feeding pipes, 7 motor covers, 8 first motors, 9 rotating rods, 10 bearings, 11 rotating discs, 12 first transmission tooth columns, 13 transmission belts, 14 second transmission tooth columns, 15 second motors, 16 scraping plates, 17 stirring plates, 18 stirring rods, 19 vertical rotating plates, 20 transmission pipes, 21 first filter screens, 22 valves, 23 water pumps, 24 decomposition kettles, 25 heaters, 26 discharge pipes, 27 second filter screens, 28 compression kettles, 29 liquid inlet pipes and 30 pressure increasing valves.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a battery-grade lithium carbonate preparation device comprises a bottom plate 1, wherein support legs 2 are fixedly installed at the top of the bottom plate 1, a support plate 3 is fixedly installed at the top of the support legs 2, a hydrogenation reaction kettle 4 is fixedly installed at the top of the support plate 3, a vent pipe 5 is fixedly installed at the left side of the top of the hydrogenation reaction kettle 4, a feed pipe 6 is fixedly installed at the right side of the top of the hydrogenation reaction kettle 4, a motor cover 7 is fixedly installed at the top of the hydrogenation reaction kettle 4 and located between the vent pipe 5 and the opposite side of the feed pipe 6, a first motor 8 is fixedly installed inside the motor cover 7, the model of the first motor 8 can be Y80M1-2, a rotating rod 9 located inside the hydrogenation reaction kettle 4 is fixedly installed at the output end of the first motor 8, a bearing 10 located at the top wall of an inner cavity of the hydrogenation reaction kettle 4 is movably installed at the outer side of the rotating rod 9, the hydrogenation reaction kettle 4 is a cylinder with a hollow inner part, the outer diameter of the rotary disk 11 is matched with the inner diameter of the hydrogenation reaction kettle 4, a round hole is formed in the top of the rotary disk 11, the diameter of the round hole is matched with the diameter of the rotary rod 9, a first transmission toothed column 12 is fixedly installed at the bottom of the rotary disk 11, the bottom of the first transmission toothed column 12 penetrates through the hydrogenation reaction kettle 4 and the support plate 3 and extends to the bottom of the support plate 3, a rotating belt 13 is meshed on the outer side of the first transmission toothed column 12, a second transmission toothed column 14 is meshed on the inner side of one end, far away from the first transmission toothed column 12, of the transmission belt 13, a second motor 15 is fixedly installed at the top of the second transmission toothed column 14 and located at the top of the support plate 3, the type of the second motor 15 can be Y80M1-2, scraping plates 16 are fixedly installed on the left side and the right side of the top of the rotary disk 11, each scraping, stirring plates 17 are fixedly installed on the outer side of the rotating rod 9, the number of the stirring plates 17 is fourteen, the fourteen stirring plates 17 are uniformly distributed on the outer side of the rotating rod 9, stirring rods 18 are fixedly installed on one sides opposite to the scraping plates 16, the number of the stirring rods 18 is twelve, six stirring rods 18 are fixedly installed on one sides opposite to the two scraping plates 16, vertical rotating plates 19 are movably installed on the outer sides of the stirring rods 18, the stirring rods 18 and the stirring plates 17 are installed in a crossed mode, the height of each vertical rotating plate 19 is smaller than the distance between every two stirring plates 17, a transmission pipe 20 is fixedly installed on the right side of the hydrogenation reaction kettle 4, a first filter screen 21 is fixedly installed inside the transmission pipe 20, a valve 22 is fixedly installed on the outer side of the transmission pipe 20 and located on the right side of the first filter screen 21, the model of the valve 22 can be Z41Y-16C, a water pump 23 is fixedly installed on the outer side of the transmission, the model of the water pump 23 can be 150QJ10-50/7, one end of the transmission pipe 20 far away from the hydrogenation reaction kettle 4 penetrates through the water pump 23 and extends to the right side of the water pump 23, one end of the transmission pipe 20 far away from the hydrogenation reaction kettle 4 is fixedly connected with the decomposition kettle 24 positioned at the top of the bottom plate 1, one end of the transmission pipe 20 close to the hydrogenation reaction kettle 4 penetrates through the right side of the hydrogenation reaction kettle 4 and extends to the inside of the hydrogenation reaction kettle 4, one end of the transmission pipe 20 close to the decomposition kettle 24 penetrates through the top of the decomposition kettle 24 and extends to the inside of the decomposition kettle 24, heaters 25 are fixedly installed on the left side and the right side of the decomposition kettle 24, the model of the heater 25 can be DDRUF (25) -380/10, a discharge pipe 26 is fixedly installed at the bottom of the decomposition kettle 24, a second filter screen 27 is movably installed inside the discharge pipe 26, a compression kettle 28 is fixedly, the left side of the compression kettle 28 is fixedly provided with a liquid inlet pipe 29, the right side of the compression kettle 28 is fixedly provided with a pressure increasing valve 30, and the type of the pressure increasing valve 30 can be VBA 1110.

The utility model provides a preparation method of battery-grade lithium carbonate, which comprises the following steps:

1) mixing industrial-grade lithium carbonate and water according to a certain proportion to prepare slurry, introducing the slurry into a hydrogenation reaction kettle 4 through a feeding pipe 6, and then introducing carbon dioxide into the reaction kettle 4 through a vent pipe 5;

2) turning on the first motor 8 to rotate the rotating rod 9 in the bearing 10 to drive the stirring plate 17 to rotate, turning on the second motor 15 to rotate the second transmission gear column 14, further rotating the first transmission gear column 12 through the transmission belt 13, finally rotating the rotating disc 11, the rotation direction is opposite to the rotating rod 9, the scraper 16 at the top of the rotating disk 11 rotates along with the rotating rod 9, the stirring plate 17 at the outer side of the rotating rod 9 and the stirring rod 18 at the outer side of the scraper 16 rotate relatively to drive the inside slurry to generate relative impact force, so that the stirring is more uniform, and the vertical rotating plate 19 rotates in the vertical direction by the pressure of the slurry while rotating horizontally along with the stirring rod 18, so as to stir in the vertical direction, so that the stirring is more uniform, and the solid slurry attached to the inner wall of the hydrogenation reaction kettle 4 is scraped to fully react with the carbon dioxide when the scraper 16 rotates, so as to prevent the uneven stirring;

3) after the hydrogenation reaction in the step 2) is completed, obtaining a lithium bicarbonate solution, opening a valve 22 and enabling a water pump 23 to work, enabling the lithium bicarbonate solution to flow along a conveying pipe 20 under the action of the water pump 23, and filtering through a first filter screen 21 to obtain a pure lithium bicarbonate solution to enter a decomposition kettle 24;

4) after the lithium bicarbonate solution prepared in the step 2) completely enters the decomposition kettle 24, a heater 25 is started to heat the decomposition kettle 24, the temperature is ninety-hundred ℃, lithium bicarbonate decomposes into generally pure solid lithium carbonate at high temperature, and liquid waste residue is filtered through a second filter screen 27;

5) adding calcium hydroxide into the decomposition kettle 24 to keep the temperature in the kettle between ninety ℃ and one hundred ℃, and carrying out causticization reaction on the calcium hydroxide and the solid lithium carbonate prepared in the step 4) to generate lithium hydroxide;

6) filtering and cleaning the lithium hydroxide solution prepared in the step 5) to obtain a filtrate, transferring the filtrate into a compression kettle 28, and obtaining a concentrated solution under the action of a pressure increasing valve 30;

When the lithium carbonate hydrogenation reactor is used, the first motor 8 and the second motor 15 are turned on, industrial-grade lithium carbonate is introduced into the hydrogenation reactor 4, carbon dioxide is introduced, the stirring plate 17 and the stirring rod 18 rotate relatively to enable stirring to be more sufficient, and the scraper 16 scrapes off solid slurry attached to the inner wall of the hydrogenation reactor 4 to fully react with the carbon dioxide.

In summary, according to the preparation method and the preparation apparatus for battery-grade lithium carbonate, the first motor 8 is arranged to rotate the rotating rod 9 in the bearing 10, so as to drive the stirring plate 17 to rotate, the second motor 15, the first transmission toothed column 12, the second transmission toothed column 14 and the transmission belt 13 are arranged to rotate the turntable 11, the stirring plate 17 outside the rotating rod 9 and the stirring rod 18 outside the scraper 16 rotate relatively, so as to drive the slurry inside to generate a relative impact force, so that the stirring is more uniform, and the vertical rotating plate 19 rotates in the vertical direction under the pressure of the slurry while rotating horizontally along with the stirring rod 18, so as to stir in the vertical direction, and the scraper 16 also scrapes off the solid slurry attached to the inner wall of the hydrogenation reactor 4 to fully react with the carbon dioxide when rotating, so as to achieve the purpose of fully stirring.

And, through the setting of the decomposing kettle 24, after the lithium bicarbonate is decomposed at high temperature, primarily pure lithium carbonate is obtained, the liquid waste residue is filtered out through the second filter screen 27, then calcium hydroxide is added into the decomposing kettle 24 to keep the temperature in the kettle between ninety ℃ and one hundred ℃, calcium hydroxide and solid lithium carbonate are subjected to causticization reaction to generate lithium hydroxide, the lithium hydroxide solution is subjected to multi-filtration and cleaning to obtain filtrate, the filtrate is transferred to the compressing kettle 28, under the action of the booster valve 30, a concentrated solution is obtained, impurities such as calcium, magnesium and the like are removed from the concentrated solution through plasma exchange resin, the concentrated solution is introduced into carbon dioxide at high temperature again to react and then is filtered, the filter residue is dried, and pure battery-grade lithium carbonate can be obtained, the battery-grade lithium carbonate is subjected to causticization reaction, more impurities are removed in the process, and the lithium carbonate is more pure, the purpose of high preparation purity is achieved, and the problems that when the preparation system is used for hydrogenation reaction, the stirring is too simple, the hydrogenation reaction is insufficient, partial slurry possibly adheres to the inner wall of the reaction kettle in the stirring process and cannot complete the hydrogenation reaction, so that the stirring is insufficient at all, the preparation system obtains lithium carbonate after the decomposition reaction is completed, the decomposed lithium carbonate can further undergo causticization reaction to obtain lithium carbonate with higher purity, and the preparation purity of the preparation system is not high enough are solved.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A battery level lithium carbonate preparation facilities, includes bottom plate (1), its characterized in that: the top fixed mounting of bottom plate (1) has stabilizer blade (2), the top fixed mounting of stabilizer blade (2) has backup pad (3), the top fixed mounting of backup pad (3) has hydrogenation cauldron (4), the left side fixed mounting at hydrogenation cauldron (4) top has breather pipe (5), the right side fixed mounting at hydrogenation cauldron (4) top has inlet pipe (6), the top of hydrogenation cauldron (4) just is located between breather pipe (5) and the relative one side of inlet pipe (6) fixed mounting has motor cover (7), the inside fixed mounting of motor cover (7) has first motor (8), the output fixed mounting of first motor (8) has bull stick (9) that are located hydrogenation cauldron (4) inside, the outside movable mounting of bull stick (9) has bearing (10) that are located hydrogenation cauldron (4) inner chamber roof, the bottom in bull stick (9) outside and the diapire movable mounting that is located hydrogenation cauldron (4) inner chamber have carousel (11), the bottom fixed mounting of carousel (11) has first transmission tooth post (12), the bottom of first transmission tooth post (12) runs through hydrogenation cauldron (4) and backup pad (3) and extends to the bottom of backup pad (3), the outside meshing of first transmission tooth post (12) has drive belt (13), the inboard meshing that first transmission tooth post (12) one end was kept away from in drive belt (13) has second transmission tooth post (14), the top of second transmission tooth post (14) and the top fixed mounting that is located backup pad (3) have second motor (15), the equal fixed mounting in the left and right sides at carousel (11) top has scraper blade (16), the outside fixed mounting of bull stick (9) has stirring plate (17), a stirring rod (18) is fixedly installed on one side opposite to the scraper (16), a vertical rotating plate (19) is movably installed on the outer side of the stirring rod (18), a transmission pipe (20) is fixedly installed on the right side of the hydrogenation reaction kettle (4), a first filter screen (21) is fixedly installed inside the transmission pipe (20), a valve (22) is fixedly installed on the outer side of the transmission pipe (20) and positioned on the right side of the first filter screen (21), a water pump (23) is fixedly installed on the outer side of the transmission pipe (20) and positioned on the right side of the valve (22), one end, far away from the hydrogenation reaction kettle (4), of the transmission pipe (20) penetrates through the water pump (23) and extends to the right side of the water pump (23), a decomposition kettle (24) positioned on the top of the bottom plate (1) is fixedly connected to one end, far away from the hydrogenation reaction kettle (4), of the transmission pipe (20), heaters (25) are fixedly installed on the left, the bottom fixed mounting of decomposition cauldron (24) has discharging pipe (26), the inside movable mounting of discharging pipe (26) has second filter screen (27), the top of bottom plate (1) and the right side fixed mounting that is located decomposition cauldron (24) have compression cauldron (28), the left side fixed mounting of compression cauldron (28) has feed liquor pipe (29), the right side fixed mounting of compression cauldron (28) has pressure boost valve (30).

2. A battery grade lithium carbonate preparation apparatus according to claim 1, wherein: the hydrogenation reaction kettle (4) is a cylinder with a hollow inner part, and the outer diameter of the rotary disc (11) is matched with the inner diameter of the hydrogenation reaction kettle (4).

3. A battery grade lithium carbonate preparation apparatus according to claim 1, wherein: the top of the rotary table (11) is provided with a round hole, and the diameter of the round hole is matched with that of the rotary rod (9).

4. A battery grade lithium carbonate preparation apparatus according to claim 1, wherein: the scraper (16) is a cuboid, and the top of the scraper (16) extends to the top wall of the inner cavity of the hydrogenation reaction kettle (4).

5. A battery grade lithium carbonate preparation apparatus according to claim 1, wherein: the number of the stirring plates (17) is fourteen, and the fourteen stirring plates (17) are uniformly distributed on the outer side of the rotating rod (9).

6. A battery grade lithium carbonate preparation apparatus according to claim 1, wherein: the number of the stirring rods (18) is twelve, and six stirring rods (18) are fixedly mounted on one side opposite to the two scraping plates (16).

7. A battery grade lithium carbonate preparation apparatus according to claim 1, wherein: the stirring rods (18) and the stirring plates (17) are arranged in a crossed mode, and the height of the vertical rotating plate (19) is smaller than the distance between the two stirring plates (17).

8. A battery grade lithium carbonate preparation apparatus according to claim 1, wherein: one end of the conveying pipe (20) close to the hydrogenation reaction kettle (4) penetrates through the right side of the hydrogenation reaction kettle (4) and extends to the inside of the hydrogenation reaction kettle (4), and one end of the conveying pipe (20) close to the decomposition kettle (24) penetrates through the top of the decomposition kettle (24) and extends to the inside of the decomposition kettle (24).