Lithium carbonate crystallization precipitation device

Abstract

This invention discloses a lithium carbonate crystallization and precipitation device, belonging to the field of chemical equipment technology. It includes a shell, a hydraulic rod support frame, a reaction chamber, a filter chamber, a pressure plate, a storage tank, a first telescopic hose, and a second telescopic hose. The shell comprises an upper shell and a lower shell. The reaction chamber is fixedly connected inside the upper shell, and the filter chamber is disposed inside the lower shell. A bracket is fixedly connected to the top of the pressure plate. A crossbeam is provided at the top of the hydraulic rod support frame, and a hydraulic rod is fixedly connected to the crossbeam. The bottom of the hydraulic rod is fixedly connected to the bracket. The pressure plate is disposed inside the shell and slidably connected to the shell. Multiple storage tanks are symmetrically fixedly connected to the sides of the reaction chamber. The top of the first telescopic hose is fixedly connected to the reaction chamber, and the bottom of the first telescopic hose is fixedly connected to the pressure plate. The top of the second telescopic hose is fixedly connected to the storage tank, and the bottom of the second telescopic hose is fixedly connected to the pressure plate. This invention is convenient and simple to use; lithium carbonate crystallization, precipitation, washing, filtration, and drying can all be completed in one device.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and more specifically, to a lithium carbonate crystallization and precipitation apparatus. Background Technology

[0002] Lithium carbonate, with the chemical formula Li₂CO₃ and a molecular weight of 73.89, is an inorganic compound. It is a colorless monoclinic crystal, slightly soluble in water and dilute acids, but insoluble in ethanol and acetone. Its thermal stability is lower than that of carbonates of other elements in the same group of the periodic table, and it does not deliquesce in air. Lithium carbonate has a wide range of applications. It is used in the manufacture of lithium compounds, enamel, and glass; it is a raw material for the production of lithium compounds and metallic lithium; it can be used as an additive in the electrolytic bath of aluminum smelting; it is also used in the synthesis of rubber, dyes, semiconductors, military and defense industries, televisions, atomic energy, medicine, and catalysts; it can also be used to produce acoustic-grade and optical-grade single crystals; it is used to treat manic-depressive disorder and in the production of sedatives; and it has wide applications in the glass, ceramics, pharmaceutical, and food industries. One of the most important uses of lithium carbonate is in the preparation of lithium cobalt oxide, lithium manganese oxide, ternary materials, and lithium iron phosphate, which are positive electrode materials for lithium-ion batteries. It is an extremely important raw material for the new energy industry that the country is vigorously developing.

[0003] There are various methods for preparing lithium carbonate, but most ultimately involve adding sodium carbonate to lithium sulfate or other lithium-ion-containing solutions, causing a displacement reaction that crystallizes into lithium carbonate crystals. The lithium carbonate is then washed, centrifuged, and dried to produce the final product. Traditional lithium carbonate production processes involve different steps—crystallization, washing, centrifugation, and drying—performed in separate pieces of equipment, requiring significant equipment and capital investment. Furthermore, the lithium carbonate needs to be transferred through multiple devices, resulting in low production efficiency and high costs. Therefore, there is a need for lithium carbonate crystallization equipment that improves production efficiency.

[0004] Content of this invention

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a lithium carbonate crystallization precipitation device. This invention is convenient and simple to use, and lithium carbonate crystallization precipitation, washing, filtration and drying can all be completed in one device, which can effectively reduce production costs and improve production efficiency.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A lithium carbonate crystallization precipitation device includes a shell, a hydraulic rod support frame, a reaction chamber, a filter chamber, a pressure plate, a storage tank, a first telescopic hose, and a second telescopic hose. The shell includes an upper shell and a lower shell. The reaction chamber is fixedly connected to the upper shell, and the filter chamber is disposed in the lower shell. A bracket is fixedly connected to the top of the pressure plate. A crossbeam is provided on the top of the hydraulic rod support frame, and a hydraulic rod is fixedly connected to the crossbeam. The bottom of the hydraulic rod is fixedly connected to the bracket. The pressure plate is disposed in the shell and slidably connected to the shell. Multiple storage tanks are symmetrically fixedly connected to the sides of the reaction chamber. The top of the first telescopic hose is fixedly connected to the reaction chamber, and the bottom of the first telescopic hose is fixedly connected to the pressure plate. The top of the second telescopic hose is fixedly connected to the storage tank, and the bottom of the second telescopic hose is fixedly connected to the pressure plate.

[0008] The first telescopic hose is provided with a first connecting rod. The bottom of the first connecting rod is fixedly connected to the pressure plate. The upper part of the first connecting rod passes through the reaction chamber and is slidably connected to the reaction chamber. The bottom of the reaction chamber is provided with a first opening. A first slot is provided above the first opening. A first blocking plate is fixedly connected to the top of the first connecting rod. The first blocking plate and the first slot are interference-fitted. A second opening is provided at the connection between the bottom of the first connecting rod and the pressure plate. The diameter of the first opening is the same as the diameter of the second opening. The diameter of the first connecting rod is smaller than the diameter of the first opening. The diameter of the first opening is less than or equal to the inner diameter of the first telescopic hose.

[0009] The pressure plate can be driven to move vertically within the housing by a hydraulic rod. The first telescopic hose and the second telescopic hose can both extend and retract with the vertical displacement of the pressure plate. When the pressure plate is at its lowest position, the first blocking plate is locked in the first slot, and the first blocking plate seals the first opening.

[0010] In a preferred embodiment of the present invention, a second connecting rod is provided inside the second telescopic hose. The bottom of the second connecting rod is fixedly connected to the pressure plate, and the upper part of the second connecting rod passes through the liquid storage tank and is slidably connected to the liquid storage tank. A third opening is provided at the bottom of the liquid storage tank, and a second slot is provided above the third opening. A second blocking plate is fixedly connected to the top of the second connecting rod, and the second blocking plate is interference-fitted with the second slot. A fourth opening is provided at the connection between the bottom of the second connecting rod and the pressure plate. The diameter of the third opening is the same as the diameter of the fourth opening. The diameter of the second connecting rod is smaller than the diameter of the third opening, and the diameter of the third opening is less than or equal to the inner diameter of the second telescopic hose.

[0011] When the pressure plate is at its lowest position, the second blocking plate is engaged in the second slot, and the second blocking plate seals the third opening.

[0012] In a preferred embodiment of the present invention, the second connecting rod includes a sliding rod and a sleeve. The sliding rod is disposed above the sleeve and is slidably connected to the sleeve. A second blocking plate is fixedly connected to the top of the sliding rod. A fourth opening is provided at the connection between the bottom of the sleeve and the pressure plate on the pressure plate. A limiting plate is fixedly connected to the bottom of the sliding rod, and a limiting ring is fixedly connected to the top of the sleeve. The diameter of the limiting plate is larger than the diameter of the sliding rod, and the limiting plate is disposed inside the sleeve and slidably connected to the sleeve.

[0013] The setting of the limiting plate and the limiting ring allows the sliding rod to slide inside the sleeve, but the sliding rod cannot slide out of the sleeve.

[0014] In a preferred embodiment of the present invention, a first fixing rod is fixedly connected to the second opening, the first fixing rod is fixedly connected to the bottom of the first connecting rod, and a second fixing rod is fixedly connected to the fourth opening, the second fixing rod is fixedly connected to the bottom of the sleeve.

[0015] The first connecting rod is fixedly connected to the pressure plate via a first fixing rod, and the second connecting rod is fixedly connected to the pressure plate via a second fixing rod.

[0016] In a preferred embodiment of the present invention, a fixing plate is fixedly connected inside the lower housing, a drive motor is fixedly connected to the fixing plate, a filter chamber is rotatably connected to the top of the fixing plate, and the drive motor shaft is fixedly connected to the filter chamber.

[0017] The drive motor can rotate the filter chamber.

[0018] As a preferred embodiment of the present invention, a support base is fixedly connected to the lower part of the outer wall of the lower housing, an air inlet is provided on one side of the lower housing, an air outlet is provided on the other side of the lower housing, and a liquid outlet is provided at the bottom of the lower housing;

[0019] The air inlet can be connected to a hot air blower, the air outlet can be connected to a suction fan, and the liquid outlet is used to discharge the liquid inside the housing.

[0020] In a preferred embodiment of the present invention, the top of the lower housing is provided with an annular groove, and the bottom of the upper housing is provided with an annular retaining plate, wherein the annular retaining plate and the annular groove are interference-fitted.

[0021] The upper housing can be snapped onto the lower housing.

[0022] As a preferred embodiment of the present invention, the top of the upper shell is provided with a first liquid inlet, which is connected to the reaction chamber, and the top of the liquid storage chamber is provided with a second liquid inlet, which penetrates the top of the upper shell. The top of the upper shell is also provided with a through hole that allows the support to slide.

[0023] Compared with the prior art, the advantages of this invention are:

[0024] (1) In this scheme, the crystallization reaction of lithium carbonate is carried out in the reaction chamber. After the reaction is completed, the solution and lithium carbonate enter the filter chamber. The filter chamber can retain the lithium carbonate solid and filter the liquid. The storage chamber contains washing liquid, which can wash the lithium carbonate in the filter chamber. The filter chamber can be rotated to centrifuge the lithium carbonate. Finally, hot air can be introduced into the lithium carbonate in the filter chamber for drying, and finally the finished lithium carbonate product is obtained. The crystallization, washing, filtration and drying of lithium carbonate can all be completed in one device. This scheme is convenient and simple to use, and can effectively reduce production costs and improve production efficiency.

[0025] (2) In this scheme, the pressure plate has different effects when it is at different heights. When the pressure plate is raised above the first height but not above the second height, the first blocking plate is disengaged from the first slot and the first opening is unsealed. This allows the solution and lithium carbonate that have finished reacting to pass through the first opening, the first telescopic hose and the second opening into the filter chamber. At this time, the sleeve is raised with the pressure plate and the sliding rod gradually slides into the sleeve. The second blocking plate at the top of the sliding rod cannot immediately disengage from the second slot and the third opening cannot immediately unseal, preventing the washing liquid from entering the filter chamber before the solution in the filter chamber has been filtered. When the pressure plate is raised above the second height but not above the third height, the second blocking plate is disengaged from the second slot, allowing the washing liquid to pass through the third opening, the second telescopic hose and the fourth opening into the filter chamber. When the pressure plate is raised above the third height, the upper shell and the lower shell are separated, exposing the filter chamber in the lower shell, so that the dried lithium carbonate product can be easily taken out. Compared with the traditional method, this scheme does not require a complicated remote control program, achieves multiple control effects, has a simple device structure, low cost and is very convenient for replacement and maintenance.

[0026] (3) In this scheme, after the reaction solution enters the filter chamber, the rotation of the filter chamber can drive the solution in the filter chamber to be centrifugally filtered. During the rotation of the filter chamber, the pressure plate can move vertically back and forth between the first height and the second height to perform pressure filtration on the solution. The combination of centrifugal filtration and pressure filtration effectively improves the filtration effect. Attached Figure Description

[0027] Figure 1 This is a perspective view of the lithium carbonate crystallization precipitation apparatus of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the lithium carbonate crystallization precipitation device of the present invention;

[0029] Figure 3 This is a perspective view of the reaction chamber and pressure plate of the lithium carbonate crystallization precipitation apparatus of the present invention;

[0030] Figure 4 This is a cross-sectional perspective view of the reaction chamber and pressure plate of the lithium carbonate crystallization precipitation apparatus of the present invention;

[0031] Figure 5 The lithium carbonate crystallization precipitation apparatus of the present invention Figure 4 A magnified view of a section at point A in the middle;

[0032] Figure 6 The lithium carbonate crystallization precipitation apparatus of the present invention Figure 4 A magnified view of a section at point B in the middle;

[0033] Figure 7 The lithium carbonate crystallization precipitation apparatus of the present invention Figure 4 A magnified view of a section at point C;

[0034] Figure 8 The lithium carbonate crystallization precipitation apparatus of the present invention Figure 4 A magnified view of a section at point D;

[0035] Figure 9 The lithium carbonate crystallization precipitation apparatus of the present invention Figure 4 A magnified view of a section at point E in the middle;

[0036] Figure 10 This is a partial sectional perspective view of the lower shell of the lithium carbonate crystallization precipitation apparatus of the present invention;

[0037] Figure 11 This is a perspective view of the upper housing of the lithium carbonate crystallization precipitation apparatus of the present invention;

[0038] Figure 12 This is a perspective view of the pressure plate and hydraulic rod support frame of the lithium carbonate crystallization precipitation apparatus of the present invention.

[0039] Explanation of the labels in the diagram:

[0040] 1. Shell; 2. Hydraulic rod support frame; 3. Reaction chamber; 4. Filter chamber; 5. Pressure plate; 6. Liquid storage chamber; 7. First telescopic hose; 8. Second telescopic hose; 11. Upper shell; 12. Lower shell; 111. First liquid inlet; 112. Annular retaining plate; 121. Annular retaining groove; 122. Support base; 123. Liquid outlet; 124. Air inlet; 125. Air outlet; 126. Drive motor; 1261. Fixing plate; 21. Hydraulic rod; 22. Crossbeam; 31. First opening; 32. First slot; 51. Bracket; 52. First connecting rod; 53. Second connecting rod; 54. Second opening; 55. Fourth opening; 521. First blocking plate; 531. Second blocking plate; 532. Sliding rod; 533. Sleeve; 5321. Limiting plate; 5331. Limiting ring; 541. First fixing rod; 551. Second fixing rod; 61. Second liquid inlet; 62. Third opening; 63. Second slot. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Please see Figure 1-12 A lithium carbonate crystallization precipitation device includes a housing 1, a hydraulic rod support frame 2, a reaction chamber 3, a filter chamber 4, a pressure plate 5, a storage tank 6, a first telescopic hose 7, and a second telescopic hose 8. The housing 1 includes an upper housing 11 and a lower housing 12. The reaction chamber 3 is fixedly connected to the upper housing 11, and the filter chamber 4 is disposed in the lower housing 12. A bracket 51 is fixedly connected to the top of the pressure plate 5. A crossbeam 22 is provided on the top of the hydraulic rod support frame 2, and a hydraulic rod 21 is fixedly connected to the crossbeam 22. The bottom of the hydraulic rod 21 is fixedly connected to the bracket 51. The pressure plate 5 is disposed inside the housing 1 and is slidably connected to the housing 1. Multiple storage tanks 6 are symmetrically fixedly connected to the side of the reaction chamber 3. The top of the first telescopic hose 7 is fixedly connected to the reaction chamber 3, and the bottom of the first telescopic hose 7 is fixedly connected to the pressure plate 5. The top of the second telescopic hose 8 is fixedly connected to the storage tank 6, and the bottom of the second telescopic hose 8 is fixedly connected to the pressure plate 5.

[0044] The first telescopic hose 7 is provided with a first connecting rod 52. The bottom of the first connecting rod 52 is fixedly connected to the pressure plate 5. The upper part of the first connecting rod 52 passes through the reaction chamber 3 and is slidably connected to the reaction chamber 3. The bottom of the reaction chamber 3 is provided with a first opening 31. The first slot 32 is provided above the first opening 31. The top of the first connecting rod 52 is fixedly connected with a first blocking plate 521. The first blocking plate 521 and the first slot 32 are interference-fitted. The bottom of the first connecting rod 52 on the pressure plate 5 is provided with a second opening 54 at the connection between the pressure plate 5 and the pressure plate 5. The diameter of the first opening 31 is the same as the diameter of the second opening 54. The diameter of the first connecting rod 52 is smaller than the diameter of the first opening 31. The diameter of the first opening 31 is less than or equal to the inner diameter of the first telescopic hose 7.

[0045] The pressure plate 5 can be driven to move vertically within the housing 1 by the hydraulic rod 21. The first telescopic hose 7 and the second telescopic hose 8 can both extend and retract with the vertical displacement of the pressure plate 5. When the pressure plate 5 is at its lowest position, the first blocking plate 521 is locked in the first slot 32, and the first blocking plate 521 seals the first opening 31.

[0046] In this embodiment, the crystallization reaction of lithium carbonate is carried out in the reaction chamber 3. After the reaction is completed, the solution and lithium carbonate enter the filter chamber 4. The filter chamber 4 can retain the lithium carbonate solid and filter the liquid. The storage chamber 6 contains washing liquid, which can wash the lithium carbonate in the filter chamber 4. The filter chamber 4 can be rotated to centrifuge and separate the lithium carbonate. Finally, hot air can be introduced into the lithium carbonate in the filter chamber 4 for drying, and finally the finished lithium carbonate product is obtained.

[0047] Since the pressure plate 5 can be driven to move vertically within the housing 1 by the hydraulic rod 21, a first connecting rod 52 is provided inside the first telescopic hose 7. The bottom of the first connecting rod 52 is fixedly connected to the pressure plate 5, and the upper part of the first connecting rod 52 passes through the reaction chamber 3 and is slidably connected to the reaction chamber 3. A first opening 31 is provided at the bottom of the reaction chamber 3, and a first slot 32 is provided above the first opening 31. A first blocking plate 521 is fixedly connected to the top of the first connecting rod 52. The first blocking plate 521 and the first slot 32 are interference-fitted so that when the pressure plate 5 is at its lowest position, the first blocking plate 521 is locked in the first slot 32, and the first blocking plate 521 seals the first opening 31.

[0048] Because a second opening 54 is provided at the connection between the bottom of the first connecting rod 52 on the pressure plate 5 and the pressure plate 5, the diameter of the first opening 31 is the same as the diameter of the second opening 54, the diameter of the first connecting rod 52 is smaller than the diameter of the first opening 31, and the diameter of the first opening 31 is less than or equal to the inner diameter of the first telescopic hose 7, after the seal of the first opening 31 is released, the solution and its solids in the reaction chamber 3 can enter the filter chamber 4 through the first opening 31, the first telescopic hose 7 and the second opening 54.

[0049] After the reaction in the final reaction chamber 3 is completed, simply lift the pressure plate 5 to disengage the first blocking plate 521 from the first slot 32 and release the seal of the first opening 31, so that the reaction-completed solution and lithium carbonate can enter the filter chamber 4 through the first opening 31, the first telescopic hose 7, and the second opening 54.

[0050] Specifically, a second connecting rod 53 is provided inside the second telescopic hose 8. The bottom of the second connecting rod 53 is fixedly connected to the pressure plate 5. The upper part of the second connecting rod 53 passes through the liquid storage tank 6 and is slidably connected to the liquid storage tank 6. A third opening 62 is provided at the bottom of the liquid storage tank 6. A second slot 63 is provided above the third opening 62. A second blocking plate 531 is fixedly connected to the top of the second connecting rod 53. The second blocking plate 531 and the second slot 63 are interference-fitted. A fourth opening 55 is provided at the connection between the bottom of the second connecting rod 53 and the pressure plate 5. The diameter of the third opening 62 is the same as the diameter of the fourth opening 55. The diameter of the second connecting rod 53 is smaller than the diameter of the third opening 62. The diameter of the third opening 62 is less than or equal to the inner diameter of the second telescopic hose 8.

[0051] When the pressure plate 5 is at its lowest position, the second blocking plate 531 is engaged in the second slot 63, and the second blocking plate 531 seals the third opening 62.

[0052] Specifically, the second connecting rod 53 includes a sliding rod 532 and a sleeve 533. The sliding rod 532 is disposed above the sleeve 533 and is slidably connected to the sleeve 533. A second blocking plate 531 is fixedly connected to the top of the sliding rod 532. A fourth opening 55 is provided at the connection between the bottom of the sleeve 5 and the pressure plate 5. A limiting plate 5321 is fixedly connected to the bottom of the sliding rod 532. A limiting ring 5331 is fixedly connected to the top of the sleeve 533. The diameter of the limiting plate 5321 is larger than the diameter of the sliding rod 532. The limiting plate 5321 is disposed inside the sleeve 533 and is slidably connected to the sleeve 533.

[0053] The setting of the limiting plate 5321 and the limiting ring 5331 allows the slide rod 532 to slide inside the sleeve 533, and the slide rod 532 cannot slide out of the sleeve 533.

[0054] In this embodiment, a second connecting rod 53 is provided inside the second telescopic hose 8. The bottom of the second connecting rod 53 is fixedly connected to the pressure plate 5, and the upper part of the second connecting rod 53 passes through the liquid storage tank 6 and is slidably connected to the liquid storage tank 6. A third opening 62 is provided at the bottom of the liquid storage tank 6, and a second slot 63 is provided above the third opening 62. A second blocking plate 531 is fixedly connected to the top of the second connecting rod 53. The second blocking plate 531 and the second slot 63 are interference-fitted so that when the pressure plate 5 is at its lowest position, the second blocking plate 531 is locked in the second slot 63, and the second blocking plate 631 seals the third opening 62.

[0055] Because a fourth opening 55 is provided at the connection between the bottom of the second connecting rod 53 on the pressure plate 5 and the pressure plate 5, the diameter of the third opening 62 is the same as the diameter of the fourth opening 55, the diameter of the second connecting rod 53 is smaller than the diameter of the third opening 62, and the diameter of the third opening 62 is less than or equal to the inner diameter of the second telescopic hose 8, after the seal of the third opening 62 is released, the washing liquid in the liquid storage tank 6 can enter the filter tank 4 through the third opening 62, the second telescopic hose 8 and the fourth opening 55;

[0056] Since the second connecting rod 53 includes a sliding rod 532 and a sleeve 533, the sliding rod 532 is located above the sleeve 533 and is slidably connected to the sleeve 533. The top of the sliding rod 532 is fixedly connected to a second blocking plate 531. The bottom of the sleeve 533 on the pressure plate 5 is provided with a fourth opening 55 at the connection between the pressure plate 5 and the pressure plate 5. This allows the pressure plate 5 to be raised from its lowest point. When the first blocking plate 521 is disengaged from the first slot 32 and the first opening 31 is unsealed, the sleeve 533 is raised with the pressure plate 5, and the sliding rod 532 gradually slides into the sleeve 533. The second blocking plate 531 at the top of the sliding rod 532 cannot be immediately disengaged from the second slot 63, and the third opening 62 cannot be immediately unsealed, preventing the washing liquid from entering the filter chamber 4 before the solution in the filter chamber 4 has been filtered.

[0057] When the pressure plate 5 is at its lowest position, the height of the pressure plate 5 is the first height. When the pressure plate 5 is raised and the slide rod 532 is fully slid into the sleeve 533, the height of the pressure plate 5 is the second height. When the height of the pressure plate 5 exceeds the second height, the second blocking plate 531 disengages from the second slot 63, allowing the washing liquid to enter the filter chamber 4 through the third opening 2, the second telescopic hose 8, and the fourth opening 55.

[0058] Specifically, a first fixing rod 541 is fixedly connected inside the second opening 54, and the first fixing rod 541 is fixedly connected to the bottom of the first connecting rod 52. A second fixing rod 551 is fixedly connected inside the fourth opening 55, and the second fixing rod 551 is fixedly connected to the bottom of the sleeve 533.

[0059] The first connecting rod 52 is fixedly connected to the pressure plate 5 via the first fixing rod 541, and the second connecting rod 53 is fixedly connected to the pressure plate 5 via the second fixing rod 551.

[0060] Specifically, a fixing plate 1261 is fixedly connected inside the lower housing 12, a drive motor 126 is fixedly connected on the fixing plate 1261, a filter chamber 4 is rotatably connected to the top of the fixing plate 1261, and the shaft of the drive motor 126 is fixedly connected to the filter chamber 4.

[0061] The drive motor 126 can drive the filter chamber 4 to rotate.

[0062] In this embodiment, the rotation of the filter chamber 4 can drive the solution inside the filter chamber 4 to undergo centrifugal filtration. During the rotation of the filter chamber 4, the pressure plate 5 can move vertically back and forth between the first height and the second height to perform pressure filtration on the solution. The combination of centrifugal filtration and pressure filtration improves the filtration effect.

[0063] Specifically, a support base 122 is fixedly connected to the lower part of the outer wall of the lower housing 12, an air inlet 124 is provided on one side of the lower housing 12, an air outlet 125 is provided on the other side of the lower housing 12, and a liquid outlet 123 is provided at the bottom of the lower housing 12.

[0064] The air inlet 124 can be connected to a hot air blower, the air outlet 125 can be connected to a suction fan, and the liquid outlet 123 is used to discharge the liquid inside the housing 1.

[0065] Specifically, the lower housing 12 is provided with an annular groove 121 at the top, and the upper housing 11 is provided with an annular plate 112 at the bottom, and the annular plate 112 is press-fitted with the annular groove 121;

[0066] The upper housing 11 can be snapped onto the lower housing 12.

[0067] In this embodiment, when the lithium carbonate is dried, hot air is introduced into the shell 1 through the air inlet and moisture is discharged through the air outlet, so as to quickly dry the lithium carbonate.

[0068] Since the upper shell 11 is mounted on the lower shell 12, and the reaction chamber 3 is fixedly connected inside the upper shell 11, when the pressure plate 5 is raised to the point where the top of the pressure plate 5 contacts the bottom of the reaction chamber 3, the height of the pressure plate 5 is the third height. When the height of the pressure plate 5 is higher than the third height, the upper shell 11 separates from the lower shell 12, exposing the filter chamber 4 inside the lower shell 12, so that the dried lithium carbonate product can be easily taken out.

[0069] Specifically, the top of the upper shell 11 is provided with a first liquid inlet 111, which is connected to the reaction chamber 3. The top of the liquid storage chamber 6 is provided with a second liquid inlet 61, which penetrates the top of the upper shell 11. The top of the upper shell 11 is also provided with a through hole that allows the support 51 to slide. The first liquid inlet 111 can be connected to a conduit to introduce reaction solutions such as lithium sulfate solution and saturated sodium carbonate into the reaction chamber 3. The second liquid inlet 61 can be connected to a conduit to introduce washing liquid into the liquid storage chamber 6.

[0070] Working principle:

[0071] Before starting work, the upper housing 11 is placed on the lower housing 12, and the pressure plate 5 is pressed down to the lowest position. At this time, the first blocking plate 521 is placed in the first slot 32, and the first blocking plate 521 seals the first opening 31. The second blocking plate 531 is placed in the second slot 63, and the second blocking plate 531 seals the third opening 62.

[0072] When the pressure plate 5 is at its lowest point, the height of the pressure plate 5 is the first height. When the pressure plate 5 is raised and the sliding rod 532 is fully slid into the sleeve 533, the height of the pressure plate 5 is the second height. When the pressure plate 5 is raised to the point where the top of the pressure plate 5 contacts the bottom of the reaction chamber 3, the height of the pressure plate 5 is the third height. The pressure plate 5 has different effects when it is at different heights.

[0073] When the operation begins, the reaction solution is introduced into the reaction chamber 3 through the first inlet 111. After the reaction is completed, the hydraulic rod 21 drives the pressure plate 5 to rise. When the pressure plate 5 rises beyond the first height but not beyond the second height, the first blocking plate 521 disengages from the first slot 32, and the first opening 31 is unsealed. This allows the solution and lithium carbonate that have finished reacting to enter the filter chamber 4 through the first opening 31, the first telescopic hose 7, and the second opening 54. At this time, the sleeve 533 rises with the pressure plate 5, and the sliding rod 532 gradually slides into the sleeve 533. The second blocking plate 531 at the top of the sliding rod 532 cannot immediately disengage from the second slot 63, and the third opening 62 cannot immediately unseal, to prevent the washing liquid from entering the filter chamber 4 before the solution in the filter chamber 4 has been completely filtered.

[0074] After the reaction solution enters the filter chamber 4, the rotation of the filter chamber 4 can drive the solution inside the filter chamber 4 to be centrifugally filtered. During the rotation of the filter chamber 4, the pressure plate 5 can move vertically back and forth between the first height and the second height to perform pressure filtration on the solution. The combination of centrifugal filtration and pressure filtration improves the filtration effect.

[0075] After filtration, the storage tank 6 is filled with washing liquid through the second inlet 61. The pressure plate 5 continues to rise. When the pressure plate 5 rises to a height exceeding the second height but not reaching the third height, the second blocking plate 531 disengages from the second slot 63, allowing the washing liquid to enter the filter chamber 4 through the third opening 62, the second telescopic hose 8, and the fourth opening 55. At this time, the filter chamber 4 continues to rotate. Due to centrifugal force, lithium carbonate is located at the edge of the filter chamber 4. Since the storage tank 6 is fixedly connected to the side of the reaction chamber 3, the fourth opening 55 is located at the edge of the pressure plate 5, which facilitates the washing liquid to rinse the lithium carbonate. Combined with the rotation of the filter chamber 4, the washing effect of lithium carbonate is improved.

[0076] After the washing liquid in the storage tank 6 is used up, the washing is finished. The filter tank 4 continues to rotate, and the liquid in the filter tank 4 is thrown out by centrifugal force. Then, the shell 1 introduces hot air through the air inlet 124 and discharges moisture through the air outlet 125, which quickly dries the lithium carbonate.

[0077] The solution inside shell 1 is discharged outside shell 1 through outlet 123;

[0078] After drying, the pressure plate 5 continues to rise. When the pressure plate 5 is raised to a height higher than the third height, the upper shell 11 separates from the lower shell 12, exposing the filter chamber 4 inside the lower shell 12, so that the dried lithium carbonate product can be easily taken out.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A lithium carbonate crystallization apparatus, characterized by: Including shell (1), hydraulic rod support frame (2), reaction bin (3), filter bin (4), pressing plate (5), liquid storage bin (6), first flexible hose (7) and second flexible hose (8), the shell (1) includes upper shell (11) and lower shell (12), the reaction bin (3) is fixedly connected in upper shell (11), the filter bin (4) is arranged in lower shell (12), the pressing plate (5) top is fixedly connected with support (51), the hydraulic rod support frame (2) top is provided with crossbeam (22), the crossbeam (22) is fixedly connected with hydraulic rod (21), and the hydraulic rod (21) bottom is fixedly connected with support (51), and the pressing plate (5) is arranged in shell (1) and is slidably connected with shell (1), the liquid storage bin (6) is multiple symmetrically fixedly connected on the side of reaction bin (3), the first flexible hose (7) top is fixedly connected with reaction bin (3) and bottom is fixedly connected with pressing plate (5), and the second flexible hose (8) top is fixedly connected with liquid storage bin (6) and bottom is fixedly connected with pressing plate (5); The first flexible hose (7) is provided with first connecting rod (52), the first connecting rod (52) bottom is fixedly connected with pressing plate (5), and the first connecting rod (52) top is fixedly connected with first baffle (521), and the first baffle (521) is in interference fit with first clamping groove (32), and the first connecting rod (52) bottom is provided with second opening (54) at the connecting portion of pressing plate (5), the first opening (31) diameter is same with the diameter of second opening (54), the diameter of first connecting rod (52) is less than the diameter of first opening (31), and the diameter of first opening (31) is less than or equal to the inner diameter of first flexible hose (7); The second flexible hose (8) is provided with second connecting rod (53), the second connecting rod (53) bottom is fixedly connected with pressing plate (5), and the second connecting rod (53) top is fixedly connected with second baffle (531), and the second baffle (531) is in interference fit with second clamping groove (63), and the second connecting rod (53) bottom is provided with fourth opening (55) at the connecting portion of pressing plate (5), the third opening (62) diameter is same with the diameter of fourth opening (55), the diameter of second connecting rod (53) is less than the diameter of third opening (62), and the diameter of third opening (62) is less than or equal to the inner diameter of second flexible hose (8); The second connecting rod (53) comprises a slide rod (532) and a sleeve (533), the slide rod (532) is arranged above the sleeve (533), the slide rod (532) is in sliding connection with the sleeve (533), the top of the slide rod (532) is fixedly connected with a second baffle plate (531), the bottom of the sleeve (533) is arranged at the connecting position of the pressing plate (5) and is provided with a fourth opening (55), the bottom of the slide rod (532) is fixedly connected with a limiting plate (5321), the top of the sleeve (533) is fixedly connected with a limiting ring (5331), the diameter of the limiting plate (5321) is greater than the diameter of the slide rod (532), and the limiting plate (5321) is arranged in the sleeve (533) and is in sliding connection with the sleeve (533); The lower shell (12) is fixedly connected with a fixed plate (1261), the fixed plate (1261) is fixedly connected with a driving motor (126), and the top of the fixed plate (1261) is rotatably connected with a filtering bin (4); the rotating shaft of the driving motor (126) is fixedly connected with the filtering bin (4); The lower shell (12) is fixedly connected with a supporting seat (122) at the lower part of the outer wall, one side of the lower shell (12) is provided with an air inlet (124), the other side of the lower shell (12) is provided with an air outlet (125), and the bottom of the lower shell (12) is provided with a liquid outlet (123); The top of the lower shell (12) is provided with an annular clamping groove (121), the bottom of the upper shell (11) is provided with an annular clamping plate (112), and the annular clamping plate (112) is in interference fit with the annular clamping groove (121); The second opening (54) is fixedly connected with a first fixed rod (541), the first fixed rod (541) is fixedly connected with the bottom of the first connecting rod (52), the fourth opening (55) is fixedly connected with a second fixed rod (551), and the second fixed rod (551) is fixedly connected with the bottom of the sleeve (533); The top of the upper shell (11) is provided with a first liquid inlet (111), the first liquid inlet (111) is communicated with the reaction bin (3), the top of the liquid storage bin (6) is provided with a second liquid inlet (61), the second liquid inlet (61) penetrates through the top of the upper shell (11), and the top of the upper shell (11) is further provided with a penetrating hole allowing the bracket (51) to slide.

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