Device for producing lithium carbonate by electrolytically oxidizing brine

Abstract

The utility model relates to the technical field of lithium carbonate production, in particular to a device for producing lithium carbonate by electrolyzing and oxidizing brine, which comprises an electrolyzing device body, a lifting mechanism and a stirring and filtering mechanism, a pretreatment box is mounted on the electrolysis device body through a supporting frame, and a heating pipe assembly is embedded in an interlayer of the inner wall of the pretreatment box; the lifting mechanism is installed on the side wall of the pretreatment box, and the stirring and filtering mechanism comprises a moving cylinder, a stand column and an adjusting mechanism. According to the utility model, the stirring and filtering mechanism is arranged between the pretreatment box and the top cover, so that brine is conveniently stirred, the uniform heating of the brine is accelerated to obtain concentrated brine, the subsequent electrolytic reaction of the electrolysis device body is facilitated, and impurities in the brine can be filtered and separated; the cleanliness of brine raw materials for electrolytic reaction in the subsequent electrolysis device body is improved, the use of subsequent reaction materials is reduced, and the production efficiency and quality of lithium carbonate are improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium carbonate production technology, specifically to an apparatus for producing lithium carbonate by electrolytic oxidation of brine. Background Technology

[0002] Lithium carbonate is an important upstream raw material for the cathode material and electrolyte lithium salt of electric vehicle power lithium batteries, and is widely used in mobile phones, new energy vehicles and other fields. Lithium carbonate can be produced by electrolyzing brine. The electrolysis method uses direct current to carry out redox reactions. The current passes through the substance, causing a chemical change, achieving oxidation or reduction. During electrolysis, Li+ ions in the brine are reduced to LiOH through the electrolytic reaction. Then, raw materials such as CaO are introduced, reacting with LiOH to form CaCO3 precipitate. The precipitate is neutralized with NaOH to obtain high-purity lithium carbonate.

[0003] However, the existing salt lake brine used to produce lithium carbonate contains a large number of impurities. When using the lithium carbonate production equipment, the brine cannot be pre-filtered. The mixing of a large number of impurities can easily increase the amount of subsequent reaction materials used, causing unnecessary waste and affecting the production efficiency of lithium carbonate. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing an apparatus for producing lithium carbonate through electrolytic oxidation of brine.

[0005] The technical solution of this utility model is as follows: A device for producing lithium carbonate by electrolytic oxidation of brine includes an electrolytic device body, on which a pretreatment tank is mounted via a support frame. A heating tube assembly is embedded in the inner wall interlayer of the pretreatment tank. A top cover is detachably mounted on the top of the pretreatment tank. A drain valve is installed at the bottom of the side wall of the pretreatment tank, and the output end of the drain valve is connected to the input end of the electrolytic device body. A lifting mechanism is mounted on the side wall of the pretreatment tank. A stirring and filtering mechanism includes a moving cylinder connected to the output end of the lifting mechanism and slidably connected to the top cover. A column has its top end connected to the top end of the moving cylinder, and a moving disc is detachably mounted on the bottom end of the column extending to the outside of the bottom end of the moving cylinder. The moving disc is slidably connected to the inner wall of the pretreatment tank. Two sets of filtering sections are symmetrically arranged on the left and right sides of the moving disc, and two sets of stirring sections are symmetrically arranged on the front and rear sides. An adjusting mechanism is driven by a drive mechanism installed inside the moving cylinder to rotate and adjust along the moving disc to cover the filtering section or the stirring section.

[0006] Preferably, a rubber seat is installed on the outer wall of the movable tray, and the rubber seat is slidably connected to the inner wall of the pretreatment box.

[0007] Preferably, the adjusting mechanism consists of an annular seat and two sets of sealing plates symmetrically installed on the side wall of the annular seat. The annular seat is rotatably connected to the outer wall of the column, and the sealing plates are slidably connected to the top of the moving disc. The projected area of ​​the sealing plates is larger than the projected area of ​​the filtering section or the stirring section.

[0008] Preferably, the drive mechanism includes a drive assembly consisting of a gear and a gear ring. The gear is driven to rotate by a motor installed at the top of the inside of the moving cylinder, and the gear ring is meshed with the gear. A rotating seat is rotatably connected to the upper end of the outer wall of the column, and the gear ring is installed outside the rotating seat. There are two sets of connecting rods, which are symmetrically installed at the bottom of the rotating seat, and the bottom ends of the two sets of connecting rods are connected to the top of the ring seat.

[0009] Preferably, the pretreatment box consists of a box body and a box bottom that is adjustablely connected to the bottom of the box body, and the top cover is detachably connected to the top of the box body by bolts.

[0010] Preferably, two sets of ear seats are symmetrically arranged on the side wall and bottom side wall of the enclosure. Each set of ear seats on the enclosure is equipped with a telescopic mechanism. The output end of the telescopic mechanism is connected to the corresponding ear seat on the bottom of the enclosure, and the bottom of the enclosure is abutted against the bottom end of the enclosure.

[0011] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: This utility model can heat and evaporate the brine to obtain concentrated brine through the pretreatment tank, which facilitates the electrolysis reaction of the subsequent electrolysis device. By setting a stirring and filtering mechanism between the pretreatment tank and the top cover, the brine is easily stirred, accelerating the uniform heating of the brine. At the same time, impurities in the brine can be filtered and separated, improving the cleanliness of the brine raw material for the electrolysis reaction in the subsequent electrolysis device, reducing the use of subsequent reaction materials, and improving the production efficiency and quality of lithium carbonate. The detachable bottom and body of the tank facilitate the cleaning of impurities filtered by the stirring and filtering mechanism, providing convenience for use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the stirring and filtering mechanism and the installation method of the pretreatment box of this utility model;

[0014] Figure 3 This is a schematic diagram of the stirring and filtering mechanism of this utility model;

[0015] Figure 4 This is a schematic diagram of the connection between the sealing plate and the column of this utility model.

[0016] Reference numerals in the attached drawings: 1. Electrolysis device body; 101. Support frame; 2. Box body; 201. Drain valve; 202. Box bottom; 203. Ear seat; 204. Telescopic mechanism; 205. Top cover; 3. Lifting mechanism; 4. Pipe body; 401. Mounting plate; 402. Column; 403. Moving plate; 404. Filter section; 405. Stirring section; 406. Rubber seat; 5. Drive assembly; 501. Rotating seat; 502. Connecting rod; 503. Annular seat; 504. Sealing plate. Detailed Implementation

[0017] Example 1

[0018] like Figures 1 to 4 As shown, the present invention proposes an apparatus for producing lithium carbonate by electrolysis of brine, comprising an electrolysis device body 1, a lifting mechanism 3, and a stirring and filtering mechanism; a pretreatment box is mounted on the electrolysis device body 1 via a support frame 101, a heating tube assembly is embedded in the inner wall interlayer of the pretreatment box, a top cover 205 is detachably mounted on the top of the pretreatment box via bolts, a drain valve 201 is mounted on the bottom of the side wall of the pretreatment box, and the output end of the drain valve 201 is connected to the input end of the electrolysis device body 1; the lifting mechanism 3 is mounted on the side wall of the pretreatment box.

[0019] The stirring and filtering mechanism includes a moving cylinder, a column 402, and an adjusting mechanism. The moving cylinder is connected to the output end of the lifting mechanism 3 via a mounting base. The lifting mechanism 3 is a hydraulic rod. The moving cylinder is slidably connected to the top cover 205. The moving cylinder consists of a tube body 4 and a mounting plate 401 that is detachably mounted on the top of the tube body 4 via bolts. The top of the column 402 is mounted on the bottom of the mounting plate 401 for easy disassembly and maintenance of the drive assembly 5. The top of the column 402 is connected to the top of the inside of the moving cylinder. The bottom of the column 402 extends to the outside of the bottom of the moving cylinder and is detachably mounted on a moving disc 403. The moving disc 403 is slidably connected to the inner wall of the pretreatment box. Two sets of filter sections 404 are symmetrically arranged on the left and right sides of the moving disc 403, and two sets of stirring sections 405 are symmetrically arranged on the front and rear sides. The filter sections 404 are equipped with filter screens, and the stirring sections 405 have multiple sets of turbulence holes of different diameters. The adjusting mechanism is driven by a drive mechanism installed inside the moving cylinder to rotate and adjust along the moving disc 403 to cover the filter sections 404 or the stirring sections 405.

[0020] Furthermore, a rubber seat 406 is installed on the outer wall of the movable disc 403. The rubber seat 406 is slidably connected to the inner wall of the pretreatment box, which reduces the damage when the movable disc 403 slides up and down along the inner wall of the pretreatment box, and at the same time prevents the brine from leaking out of the gap between the movable disc 403 and the pretreatment box and thus not being effectively filtered.

[0021] Furthermore, the adjustment mechanism consists of an annular seat 503 and two sets of sealing plates 504 symmetrically installed on the side wall of the annular seat 503. The annular seat 503 is rotatably connected to the outer wall of the column 402. The sealing plates 504 are slidably connected to the top of the movable disk 403. The projected area of ​​the sealing plate 504 is larger than the projected area of ​​the filter section 404 or the stirring section 405. A rubber pad is provided at the bottom of the sealing plate 504 to improve the sealing performance at the connection between the sealing plate 504 and the filter section 404 or the stirring section 405 and prevent leakage.

[0022] Furthermore, the drive mechanism includes a drive assembly 5, a rotating seat 501, and a connecting rod 502; the drive assembly 5 consists of a gear and a gear ring, the gear is driven to rotate by a motor installed at the top of the inside of the moving cylinder, and the gear ring is meshed with the gear; the rotating seat 501 is rotatably connected to the upper end of the outer wall of the column 402, and the gear ring is installed outside the rotating seat 501; two sets of connecting rods 502 are provided, and the two sets of connecting rods 502 are symmetrically installed at the bottom of the rotating seat 501, and the bottom ends of the two sets of connecting rods 502 are connected to the top of the ring seat 503.

[0023] In this embodiment, lithium-containing brine from the salt lake is introduced into the pretreatment tank through the inlet valve. The heating tube assembly is activated by the controller to heat and evaporate the brine inside the pretreatment tank at a suitable temperature to obtain concentrated brine, which facilitates the subsequent electrolysis reaction inside the electrolysis device 1. The hot gas generated by heating is discharged through the exhaust valve on the top cover 205. The controller activates the motor to drive the gear to rotate, which in turn drives the gear ring to rotate, so that the rotating seat 501 rotates along the column 402 at a suitable angle. Then, the connecting rod 502 drives the annular seat 503 to rotate along the column 402, and finally drives the two sets of sealing plates 504 on the annular seat 503 to slide along the moving disk 403 until the sealing plates 504 rotate to cover the filter section 404.

[0024] The controller starts the lifting mechanism 3, which drives the tube body 4 to move up or down along the top cover 205, thereby driving the moving plate 403 to slide up and down along the inner wall of the pretreatment box. The stirring part 405 fully stirs the brine, making the brine heat evenly, accelerating the evaporation of water, and shortening the pretreatment time.

[0025] After heating for a certain period of time, the lifting mechanism 3 moves the moving plate 403 to the lowest end of the pretreatment tank. The controller restarts the drive mechanism to drive the two sets of sealing plates 504 to slide along the moving plate 403 until the sealing plates 504 rotate to cover the stirring part 405. Then, the lifting mechanism 3 restarts to drive the tube 4 to move upward, which in turn drives the moving plate 403 to move upward along the inner wall of the pretreatment tank. The filter part 404 can filter the impurities in the brine. The impurities remain at the top of the moving plate 403. The filtered brine can be discharged into the electrolysis device body 1 through the opening of the drain valve 201 to obtain lithium carbonate through electrolysis reaction.

[0026] Example 2

[0027] like Figure 1 and Figure 2 As shown, the device for producing lithium carbonate by electrolytic oxidation of brine proposed in this utility model, compared with Embodiment 1, the pretreatment tank consists of a tank body 2 and a tank bottom 202 that is adjustablely connected to the bottom of the tank body 2. The top cover 205 is detachably connected to the top of the tank body 2 by bolts. The drain valve 201 is installed at the bottom of the side wall of the tank body 2. Two sets of lugs 203 are symmetrically arranged on the side wall of the tank body 2 and the side wall of the tank bottom 202. The two sets of lugs 203 on the tank body 2 are equipped with telescopic mechanisms 204. The telescopic mechanisms 204 are hydraulic rods. The output end of the telescopic mechanisms 204 is connected to the corresponding lugs 203 on the tank bottom 202. The tank bottom 202 is in abutting connection with the bottom of the tank body 2. A sealing ring is provided at the abutment point between the tank bottom 202 and the tank body 2 to improve the sealing performance of the connection and prevent leakage.

[0028] In this embodiment, the controller activates the telescopic mechanism 204 to move the bottom of the box 202 downwards away from the bottom of the box body 2. When the bottom of the box 202 moves to a suitable height, the lifting component in the lifting mechanism 3 moves the tube 4 down along the inner wall of the box body 2 until the moving plate 403 moves between the bottom of the box body 2 and the bottom of the box 2. This facilitates the cleaning of impurities filtered on the moving plate 403. The moving plate 403 can be cleaned without disassembling the top cover 205, which brings convenience to the user.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An apparatus for producing lithium carbonate by electrolytic oxidation of brine, characterized in that, include The electrolysis device body (1) has a pretreatment box installed on it via a support frame (101). A heating tube assembly is embedded in the inner wall interlayer of the pretreatment box. A top cover (205) is detachably installed on the top of the pretreatment box. A drain valve (201) is installed at the bottom of the side wall of the pretreatment box. The output end of the drain valve (201) is connected to the input end of the electrolysis device body (1). The lifting mechanism (3) is installed on the side wall of the pretreatment box; And a stirring and filtering mechanism, the stirring and filtering mechanism includes The movable cylinder is connected to the output end of the lifting mechanism (3), and the movable cylinder is slidably connected to the top cover (205); The column (402) is connected to the top of the inside of the moving cylinder. The bottom of the column (402) extends to the outside of the bottom of the moving cylinder and is detachably installed with a moving disc (403). The moving disc (403) is slidably connected to the inner wall of the pretreatment box. Two sets of filter sections (404) are symmetrically arranged on the left and right sides of the moving disc (403), and two sets of stirring sections (405) are symmetrically arranged on the front and rear sides. And an adjustment mechanism, which is driven by a drive mechanism installed inside the moving cylinder to rotate and adjust along the moving disc (403) to cover the filter section (404) or the stirring section (405).

2. The apparatus for producing lithium carbonate by electrolytic oxidation of brine according to claim 1, characterized in that, A rubber seat (406) is installed on the outer wall of the mobile tray (403), and the rubber seat (406) is slidably connected to the inner wall of the pretreatment box.

3. The apparatus for producing lithium carbonate by electrolytic oxidation of brine according to claim 1, characterized in that, The adjustment mechanism consists of an annular seat (503) and two sets of sealing plates (504) symmetrically installed on the side wall of the annular seat (503). The annular seat (503) is rotatably connected to the outer wall of the column (402). The sealing plate (504) is slidably connected to the top of the moving disk (403). The projected area of ​​the sealing plate (504) is greater than the projected area of ​​the filter section (404) or the stirring section (405).

4. The apparatus for producing lithium carbonate by electrolytic oxidation of brine according to claim 3, characterized in that, The drive mechanism includes The drive assembly (5) consists of a gear and a gear ring. The gear is driven to rotate by a motor installed at the top of the inside of the moving cylinder, and the gear ring meshes with the gear. A rotating seat (501) is rotatably connected to the upper end of the outer wall of the column (402), and a toothed ring is installed on the outside of the rotating seat (501); And connecting rods (502), which are provided in two sets. The two sets of connecting rods (502) are symmetrically installed at the bottom of the rotating seat (501), and the bottom of the two sets of connecting rods (502) are connected to the top of the ring seat (503).

5. The apparatus for producing lithium carbonate by electrolytic oxidation of brine according to claim 1, characterized in that, The pretreatment box consists of a box body (2) and a box bottom (202) that is adjustablely connected to the bottom of the box body (2). The top cover (205) is detachably connected to the top of the box body (2) by bolts.

6. The apparatus for producing lithium carbonate by electrolytic oxidation of brine according to claim 5, characterized in that, Two sets of ear seats (203) are symmetrically arranged on the side wall of the box body (2) and the side wall of the box bottom (202). The two sets of ear seats (203) on the box body (2) are equipped with telescopic mechanisms (204). The output end of the telescopic mechanism (204) is connected to the corresponding ear seat (203) on the box bottom (202). The box bottom (202) is abutted and connected to the bottom end of the box body (2).

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