Concentration device for lithium hydroxide production

Abstract

The utility model belongs to the technical field of lithium hydroxide production, and provides a concentration device for lithium hydroxide production, which comprises a lithium hydroxide concentration tank, a stirring structure is arranged in the lithium hydroxide concentration tank, heating pipes are fixedly mounted on the inner wall of the lithium hydroxide concentration tank at equal intervals, and a reflux structure is arranged on one side of the top of the lithium hydroxide concentration tank. The reflux structure is used for condensing and refluxing steam containing lithium hydroxide to the lithium hydroxide concentration tank and comprises a steam pipe inserted into one side of the top of the lithium hydroxide concentration tank in a penetrating manner, a lithium hydroxide concentration detector is arranged in the steam pipe and located outside the lithium hydroxide concentration tank, a first electromagnetic valve is arranged at the top of the steam pipe, and a second electromagnetic valve is arranged at the bottom of the first electromagnetic valve; a connecting pipe is fixedly installed at the bottom of the steam pipe and located at the end, close to the lithium hydroxide concentration tank, of the first electromagnetic valve, and a second electromagnetic valve is arranged in the connecting pipe. The problem that a certain amount of lithium hydroxide is contained in discharged steam, and if the lithium hydroxide is not recycled, economic loss is caused is solved.

Description

Technical Field

[0001] The utility model relates to the field of lithium hydroxide production, in particular to a concentration device for lithium hydroxide production. Background Art

[0002] Lithium hydroxide is an inorganic compound, a beryl crystalline powder, soluble in water, slightly soluble in ethanol, and has strong alkalinity. It is mainly used to prepare lithium salts and lithium-based greases, electrolytes for alkaline batteries, and lithium bromide refrigerator absorption liquids.

[0003] A search of the patent with publication number CN111017964A includes the following steps: reducing acid leaching of waste ternary lithium battery materials with sulfuric acid and hydrogen peroxide; adjusting the pH value of the first solution, filter pressing and washing; adding liquid alkali to the second solution for causticization; concentrating at least a portion of the third solution by MVR evaporation and centrifugation; adding at least a portion of the third solution to the first centrifuged mother liquor for dilution, cooling and crystallizing; dissolving a mixed salt of anhydrous sodium sulfate and lithium hydroxide in water, evaporating and crystallizing, and centrifuging to obtain lithium hydroxide and the third centrifuged mother liquor, respectively.

[0004] The existing technology uses evaporation to implement concentration, but the discharged steam will also contain a certain amount of lithium hydroxide, which will cause economic losses if not recovered.

[0005] Therefore, it is necessary to provide a lithium hydroxide production concentration device to solve the above technical problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a concentration device for lithium hydroxide production.

[0007] The utility model provides a concentration device for lithium hydroxide production, comprising a lithium hydroxide concentration tank, wherein a stirring structure is provided inside the lithium hydroxide concentration tank, heating pipes are fixedly installed at equal intervals on the inner wall of the lithium hydroxide concentration tank, and a reflux structure is provided on one side of the top of the lithium hydroxide concentration tank, wherein the reflux structure is used to condense steam containing lithium hydroxide and reflux it to the lithium hydroxide concentration tank.

[0008] In order to achieve the effect of recovering vapor containing lithium hydroxide, the utility model provides a concentration device for lithium hydroxide production. Preferably, the reflux structure includes a steam pipe inserted through one side of the top of the lithium hydroxide concentration tank, a lithium hydroxide concentration detector is provided inside the steam pipe and outside the lithium hydroxide concentration tank, a solenoid valve 1 is provided on the top of the steam pipe, a connecting pipe is fixedly installed at the bottom of the steam pipe and located at the end of the solenoid valve 1 close to the lithium hydroxide concentration tank, a solenoid valve 2 is provided inside the connecting pipe, a condensing tank is inserted at the bottom end of the connecting pipe, coolant circulation pipes are evenly placed inside the condensing tank, both ends of the coolant circulation pipe extend through the condensing tank, and the bottom end of the condensing tank is welded to the lithium hydroxide concentration tank through a fixedly installed reflux pipe.

[0009] In order to achieve the effect of stable output of stirring power, the utility model provides a concentration device for lithium hydroxide production. Preferably, the stirring structure includes a motor fixedly mounted on the top of the lithium hydroxide concentration tank, and a rotating shaft is inserted into the bottom end of the motor. The bottom end of the rotating shaft extends through the lithium hydroxide concentration tank and is inserted into a stabilizing plate through a rolling bearing. Both ends of the stabilizing plate are fixedly mounted inside the lithium hydroxide concentration tank.

[0010] In order to achieve the effect of uniformly stirring the lithium hydroxide solution and increasing the heated area, the utility model provides a concentration device for lithium hydroxide production. Preferably, the stirring structure also includes a plurality of stirring blades equidistantly and symmetrically fixedly installed on the circumference of the rotating shaft. The bottom end of the rotating shaft extends through the stabilizing plate and has two discharge scrapers symmetrically installed. The bottom ends of the two discharge scrapers extend to the inner bottom end of the lithium hydroxide concentration tank.

[0011] In order to achieve the effect of guiding lithium hydroxide vapor of different masses to different positions and then performing corresponding treatment, the utility model provides a concentration device for lithium hydroxide production. Preferably, the lithium hydroxide concentration detector is connected to the solenoid valve one through a wire, and the lithium hydroxide concentration detector is connected to the solenoid valve two through a wire.

[0012] In order to achieve the effect of continuously adding lithium hydroxide solution, the utility model provides a concentration device for lithium hydroxide production. Preferably, a feed port is fixedly installed on one side of the top of the lithium hydroxide concentration tank.

[0013] In order to achieve the effect of controlling the discharge of crystallized lithium hydroxide solution, the utility model provides a concentration device for lithium hydroxide production. Preferably, a discharge port is provided at the bottom end of the lithium hydroxide concentration tank and located between two discharge scrapers, and a valve is provided inside the discharge port.

[0014] In order to achieve the effect of providing operating space for the discharge port, the utility model provides a concentration device for lithium hydroxide production. Preferably, a plurality of support legs are welded at equal intervals on the bottom end of the lithium hydroxide concentration tank.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The lithium hydroxide production concentrator guides steam containing lithium hydroxide to flow back to a lithium hydroxide concentration tank for secondary evaporation through a reflux structure, thereby solving the problem that a certain amount of lithium hydroxide is contained in the existing discharged steam, which would cause economic losses if not recovered.

[0017] The lithium hydroxide concentration device solves the problem that lithium hydroxide particles concentrated by existing equipment will settle at the bottom of the lithium hydroxide concentration tank and be inconvenient to discharge by symmetrically arranging two discharge scrapers at the bottom of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a preferred embodiment of a lithium hydroxide production concentration device provided by the present invention;

[0019] Figure 2 for Figure 1 The schematic diagram of the structure of the lithium hydroxide concentration tank is shown in front cross-section;

[0020] Figure 3 for Figure 1 A structural schematic diagram shown;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure B is shown.

[0022] Numbers in the figure: 1. Lithium hydroxide concentration tank; 2. Stirring structure; 201. Motor; 202. Rotating shaft; 203. Stirring blade; 204. Stabilizing plate; 205. Discharge scraper; 3. Heating tube; 4. Reflux structure; 401. Steam pipe; 402. Lithium hydroxide concentration detector; 403. Solenoid valve 1; 404. Connecting pipe; 405. Solenoid valve 2; 406. Condensation tank; 407. Cooling liquid circulation pipe; 408. Reflux pipe; 5. Feed port; 6. Discharge port; 7. Valve; 8. Support leg. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0024] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,in, Figure 1A schematic structural diagram of a preferred embodiment of a lithium hydroxide production concentration device provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the structure of the lithium hydroxide concentration tank is shown in front cross-section; Figure 3 for Figure 1 A structural schematic diagram shown; Figure 4 for Figure 1 The schematic diagram of structure B shown includes a lithium hydroxide concentration tank 1, a stirring structure 2 is provided inside the lithium hydroxide concentration tank 1, heating tubes 3 are fixedly installed at equal intervals on the inner wall of the lithium hydroxide concentration tank 1, and a reflux structure 4 is provided on one side of the top of the lithium hydroxide concentration tank 1. The reflux structure 4 is used to condense the steam containing lithium hydroxide and reflux it to the lithium hydroxide concentration tank 1.

[0025] After the heating tube 3 is powered on, heat is generated to continuously heat the lithium hydroxide solution inside the lithium hydroxide concentration tank 1 to achieve evaporation.

[0026] It should be noted that the lithium hydroxide concentration tank 1 is made of corrosion-resistant alloy steel, and the heating tube 3 is composed of an external heating copper tube and an internal heating wire. The heating copper tube is used to isolate the lithium hydroxide solution to prevent the lithium hydroxide solution from corroding the internal heating wire.

[0027] In the specific implementation process, refer to Figure 2 and Figure 3 As shown, the reflux structure 4 includes a steam pipe 401 inserted into one side of the top of the lithium hydroxide concentration tank 1, a lithium hydroxide concentration detector 402 is provided inside the steam pipe 401 and outside the lithium hydroxide concentration tank 1, a solenoid valve 1 403 is provided on the top of the steam pipe 401, a connecting pipe 404 is fixedly installed at the bottom of the steam pipe 401 and located at the end of the solenoid valve 1 403 close to the lithium hydroxide concentration tank 1, a solenoid valve 2 405 is provided inside the connecting pipe 404, a condensing tank 406 is inserted into the bottom end of the connecting pipe 404, and coolant circulation pipes 407 are evenly placed inside the condensing tank 406, both ends of the coolant circulation pipe 407 extend through the condensing tank 406, and the bottom end of the condensing tank 406 is welded to the lithium hydroxide concentration tank 1 through a fixedly installed reflux pipe 408.

[0028] The lithium hydroxide concentration detector 402 detects the concentration of lithium hydroxide in the flowing steam in real time. Once an excess is found, the solenoid valve 1 403 is controlled to be closed and the solenoid valve 2 405 is opened to guide the steam to flow into the condenser 406, where it contacts the coolant circulation pipe 407 and is cooled to achieve liquefaction treatment, and then flows back to the lithium hydroxide concentration tank 1 for secondary concentration. If the lithium hydroxide concentration detector 402 detects that the concentration of lithium hydroxide in the flowing steam is not excessive in real time, the solenoid valve 1 403 is opened and the solenoid valve 2 405 is closed to guide the steam to be discharged into the atmosphere.

[0029] It should be noted that: the coolant circulation pipe 407 is provided with coolant, and the lithium hydroxide concentration detector 402 is an SGA-600 model or other detection components with the same function.

[0030] In the specific implementation process, refer to Figure 1 and Figure 2 As shown, the stirring structure 2 includes a motor 201 fixedly mounted on the top of the lithium hydroxide concentration tank 1, and a rotating shaft 202 is inserted at the bottom end of the motor 201. The bottom end of the rotating shaft 202 extends through the lithium hydroxide concentration tank 1 and is inserted into the stabilizing plate 204 through a rolling bearing. Both ends of the stabilizing plate 204 are fixedly mounted inside the lithium hydroxide concentration tank 1.

[0031] The motor 201 controls the rotating shaft 202 to rotate, and the stabilizing plate 204 provides stable support to prevent the bottom end of the rotating shaft 202 from vibrating.

[0032] In the specific implementation process, refer to Figure 2 As shown, the stirring structure 2 also includes a plurality of stirring blades 203 symmetrically and equidistantly fixedly mounted on the circumference of the rotating shaft 202. The bottom end of the rotating shaft 202 extends through the stabilizing plate 204 and is symmetrically mounted with two discharge scrapers 205. The bottom ends of the two discharge scrapers 205 extend to the inner bottom end of the lithium hydroxide concentration tank 1.

[0033] The motor 201 controls the rotating shaft 202 to rotate and controls the stirring blades 203 to stir, so that the internal lithium hydroxide solution is evenly exposed to the heating tube 3 to achieve the purpose of uniform heating. After drying and concentration, the motor 201 controls the two discharge scrapers 205 to rotate, and the lithium hydroxide particles attached to the bottom end of the lithium hydroxide concentration tank 1 are gathered to the discharge port 6 for automatic discharge.

[0034] It should be noted that the two discharge scrapers 205 are at a 45-degree angle to the bottom end of the lithium hydroxide concentration tank 1, and rubber plates are provided at the ends of the two discharge scrapers 205 away from each other, and the ends of the two rubber plates away from each other are tightly attached to the inner wall of the lithium hydroxide concentration tank 1.

[0035] In the specific implementation process, refer to Figure 2 and Figure 3 As shown, the lithium hydroxide concentration detector 402 is connected to the solenoid valve 1 403 through a wire, and the lithium hydroxide concentration detector 402 is connected to the solenoid valve 2 405 through a wire.

[0036] The lithium hydroxide concentration detector 402 detects the lithium hydroxide content in the lithium hydroxide vapor flowing through, and controls the corresponding opening and closing behaviors of the solenoid valve 1 403 and the solenoid valve 2 405 .

[0037] In the specific implementation process, refer to Figure 1 and Figure 2 As shown, a feed port 5 is fixedly installed on one side of the top of the lithium hydroxide concentration tank 1.

[0038] The lithium hydroxide solution is continuously added through the feed port 5 to facilitate continuous processing and drying.

[0039] In the specific implementation process, refer to Figure 2 and Figure 4 As shown, a discharge port 6 is provided at the bottom of the lithium hydroxide concentration tank 1 and between the two discharge scrapers 205 , and a valve 7 is provided inside the discharge port 6 .

[0040] The valve 7 is opened to control the opening and closing of the discharge port 6, and the lithium hydroxide particles obtained from the concentrated lithium hydroxide solution are discharged through the discharge port 6.

[0041] In the specific implementation process, refer to Figure 1 、 Figure 2 and Figure 4 As shown, a plurality of supporting legs 8 are welded at equal intervals to the bottom end of the lithium hydroxide concentration tank 1 .

[0042] The working principle of a lithium hydroxide concentration device provided by the utility model is as follows:

[0043] During use, the lithium hydroxide solution is added to the lithium hydroxide concentration tank 1 through the feed port 5. After the heating tube 3 receives voltage, it generates heat to heat the lithium hydroxide solution inside the lithium hydroxide concentration tank 1. The motor 201 controls the plurality of stirring blades 203 on the side of the rotating shaft 202 to stir the lithium hydroxide solution so that the lithium hydroxide solution is fully in contact with the heating tube 3 to avoid the problem of uneven heating. The generated steam is discharged through the steam pipe 401. When flowing through the lithium hydroxide concentration detector 402, the internal lithium hydroxide concentration is detected in real time. Once an excess is found, the solenoid valve 1 403 is controlled to be closed and the solenoid valve 2 405 is controlled to be opened. , guide the steam to flow into the condensation tank 406, contact the coolant circulation pipe 407 when it is cooled and then realize liquefaction treatment, and then return to the lithium hydroxide concentration tank 1 for secondary concentration. If the lithium hydroxide concentration detector 402 detects in real time that the concentration of lithium hydroxide in the steam flowing through is not excessive, open the solenoid valve 1 403 and close the solenoid valve 2 405 to guide the steam to be discharged into the atmosphere. After the concentration is completed, the motor 201 controls the two discharge scrapers 205 at the bottom of the rotating shaft 202 to scrape off the lithium hydroxide particles attached to the bottom of the lithium hydroxide concentration tank 1, so that the lithium hydroxide particles are squeezed to the discharge port 6 for discharge.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A concentration device for lithium hydroxide production, characterized in that: The invention comprises a lithium hydroxide concentration tank (1), wherein a stirring structure (2) is provided inside the lithium hydroxide concentration tank (1), heating pipes (3) are fixedly installed at equal intervals on the inner wall of the lithium hydroxide concentration tank (1), and a reflux structure (4) is provided on one side of the top of the lithium hydroxide concentration tank (1), and the reflux structure (4) is used to condense steam containing lithium hydroxide and reflux it to the lithium hydroxide concentration tank (1); The reflux structure (4) includes a steam pipe (401) inserted through one side of the top of the lithium hydroxide concentration tank (1), a lithium hydroxide concentration detector (402) is provided inside the steam pipe (401) and outside the lithium hydroxide concentration tank (1), a solenoid valve (403) is provided on the top of the steam pipe (401), and a solenoid valve (403) is fixedly installed at the bottom of the steam pipe (401) and located at one end of the solenoid valve (403) close to the lithium hydroxide concentration tank (1). A connecting pipe (404) is provided inside the connecting pipe (404), a solenoid valve 2 (405) is provided, a condensation tank (406) is plugged into the bottom end of the connecting pipe (404), a coolant circulation pipe (407) is evenly placed inside the condensation tank (406), both ends of the coolant circulation pipe (407) extend through the condensation tank (406), and the bottom end of the condensation tank (406) is welded to the lithium hydroxide concentration tank (1) through a fixed reflux pipe (408).

2. The lithium hydroxide production concentrator according to claim 1, wherein The stirring structure (2) comprises a motor (201) fixedly mounted on the top of the lithium hydroxide concentration tank (1); a rotating shaft (202) is plugged into the bottom end of the motor (201); the bottom end of the rotating shaft (202) extends through the lithium hydroxide concentration tank (1) and is plugged into a stabilizing plate (204) via a rolling bearing; both ends of the stabilizing plate (204) are fixedly mounted inside the lithium hydroxide concentration tank (1).

3. The lithium hydroxide production concentrator according to claim 2, wherein The stirring structure (2) further comprises a plurality of stirring blades (203) symmetrically and equidistantly fixedly mounted on the circumference of the rotating shaft (202); the bottom end of the rotating shaft (202) extends through the stabilizing plate (204) and is symmetrically mounted with two discharge scrapers (205); the bottom ends of the two discharge scrapers (205) both extend to the inner bottom end of the lithium hydroxide concentration tank (1).

4. The lithium hydroxide production concentrator according to claim 1, wherein The lithium hydroxide concentration detector (402) is connected to the electromagnetic valve 1 (403) through a wire, and the lithium hydroxide concentration detector (402) is connected to the electromagnetic valve 2 (405) through a wire.

5. The lithium hydroxide production concentrator according to claim 1, wherein A feed port (5) is fixedly installed on one side of the top of the lithium hydroxide concentration tank (1).

6. The lithium hydroxide production concentrator according to claim 1, wherein A discharge port (6) is provided at the bottom end of the lithium hydroxide concentration tank (1) and between the two discharge scrapers (205), and a valve (7) is provided inside the discharge port (6).

7. The lithium hydroxide production concentrator according to claim 1, wherein A plurality of supporting legs (8) are welded at equal intervals on the bottom end of the lithium hydroxide concentration tank (1).

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