Device for extracting lithium carbonate from salt lake brine in salt lake chemical industry

Abstract

The utility model relates to the technical field of lithium carbonate extraction, and discloses a device for extracting lithium carbonate in salt lake brine in salt lake chemical engineering, which comprises an evaporation barrel, a telescopic rod is fixedly connected to the top of the outer wall of the evaporation barrel, a support plate is fixedly connected to the output end of the telescopic rod, and a motor is arranged in the middle of the support plate. The output end of the motor is fixedly connected with a stirring rod, the middle part of the stirring rod is fixedly connected with a scraping plate, the bottom of the evaporation barrel is fixedly connected with a discharging pipe, the bottom of the stirring rod is fixedly connected with a blade, and the middle lower part of the stirring rod is rotatably connected with a pressing plate. According to the lithium carbonate crystal crushing device, the stirring rod can be driven to move upwards by driving the telescopic rod, the driving motor can drive the scraping plate to rotate to scrape off lithium carbonate crystals so that the lithium carbonate crystals can be discharged from the discharging pipe, and the blades can also be driven to rotate through the stirring rod, so that the lithium carbonate crystals can be crushed, lithium carbonate powder is directly obtained, and the working efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium carbonate extraction, in particular to a device for extracting lithium carbonate from salt lake brine by salt lake chemical industry. Background Art

[0002] Lithium carbonate is a versatile compound that is used in many fields such as battery technology, medicine, glass, ceramics, metals, etc. Lithium carbonate is generally obtained by extracting brine from salt lakes.

[0003] After searching, the Chinese patent document with the announcement number CN211111086U discloses a device for extracting lithium carbonate from salt lake brine, including a body with a shell structure, a transmission shaft is arranged in the body, the transmission shaft passes through the top wall of the body, the inner wall of the body is sealed and connected with an inclined baffle, a feed pipe is arranged on the top of the body, the feed pipe passes through the baffle and is sealed and connected with it, a support is welded at the bottom of the body, a stirring device is connected to the transmission shaft, and a reflux device is connected to the baffle. The utility model drives the transmission shaft to rotate through an external motor, and at the same time, the main impeller and the auxiliary impeller rotate at the same time in the transmission of the wide gear, the narrow gear and the toothed belt, so as to achieve the effects of overall stirring and edge stirring at a position far away from the main impeller, improve the uniformity of heating, avoid the accumulation of crystals on the inner wall of the body, and at the same time, the evaporated gas is cooled, liquefied and filtered through the baffle and the reflux chamber to re-enter the head for evaporation, so as to avoid the waste of raw materials.

[0004] This patent solves the problem in the prior art that, during concentration, uneven heating and expansion between the liquid and the inner wall of the body will easily cause solution crystals to cover the surface of the inner wall, thereby reducing the evaporation concentration efficiency while reducing the solution concentration. In addition, during the evaporation process, the evaporated gas will also carry some unconcentrated lithium carbonate and some metal impurity ions dissolved in the inner wall of the body, resulting in waste and excessive impurities.

[0005] However, during the use of the device, since lithium carbonate is in block form after crystallization, the device needs to move the lithium carbonate and crush it before the next processing after discharging the lithium carbonate, which makes the processing procedure of lithium carbonate more complicated, thereby affecting the processing efficiency of lithium carbonate. Utility Model Content

[0006] In order to make up for the above shortcomings, the utility model provides a device for extracting lithium carbonate from salt lake brine in salt lake chemical industry, aiming to improve the problem in the prior art that lithium carbonate is in block form after crystallization and needs to be moved and crushed before the next processing, which makes the processing procedure of lithium carbonate more complicated, thereby affecting the processing efficiency of lithium carbonate.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for extracting lithium carbonate from salt lake brine by salt lake chemical industry, comprising an evaporation barrel, a telescopic rod is fixedly connected to the top of the outer wall of the evaporation barrel, the output end of the telescopic rod is fixedly connected to a support plate, a motor is arranged in the middle of the support plate, a stirring rod is fixedly connected to the output end of the motor, a scraper is fixedly connected to the middle of the stirring rod, the outer side of the scraper is slidably connected to the inner wall of the evaporation barrel, a discharge pipe is fixedly connected to the bottom of the evaporation barrel, a blade is fixedly connected to the bottom of the stirring rod, the blade is located inside the discharge pipe, a pressure plate is rotatably connected to the middle and lower part of the stirring rod, the pressure plate is located at the top of the discharge pipe, and a purification component is arranged outside the evaporation barrel.

[0008] As a further description of the above technical solution:

[0009] A groove is provided on the top of the discharge pipe, and the pressing plate is located inside the groove.

[0010] As a further description of the above technical solution:

[0011] A feed pipe is fixedly connected to the top surface of the evaporation barrel, and a first valve is arranged in the middle of the feed pipe.

[0012] As a further description of the above technical solution:

[0013] A plurality of legs are fixedly connected to the bottom of the evaporation barrel.

[0014] As a further description of the above technical solution:

[0015] A cover shell is arranged on the outer side of the motor, and the cover shell is fixedly connected to the middle part of the support plate.

[0016] As a further description of the above technical solution:

[0017] The purification component includes a treatment box, an air outlet pipe, an exhaust pipe and a drain pipe. The treatment box is fixedly connected to the top of the outer wall of the evaporation barrel, one end of the air outlet pipe is fixedly connected to the top of the evaporation barrel, the middle part of the air outlet pipe is fixedly connected to the top of the treatment box, and the bottom of the air outlet pipe is above the bottom surface of the inner wall of the treatment box, the exhaust pipe is fixedly connected to one side of the top of the treatment box, the drain pipe is fixedly connected to the bottom of the treatment box, and a second valve is provided in the middle of the drain pipe.

[0018] As a further description of the above technical solution:

[0019] The processing box is provided with absorption liquid inside, and the bottom of the gas outlet pipe is lower than the liquid level of the absorption liquid, and the middle part of the gas outlet pipe is provided with a one-way valve.

[0020] As a further description of the above technical solution:

[0021] A heating tube is arranged inside the evaporating barrel.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the stirring rod can be driven to move upward inside the evaporation barrel by driving the telescopic rod. At this time, the driving motor can drive the stirring rod and the scraper to rotate to scrape the lithium carbonate crystals and discharge them from the discharge pipe. The stirring rod can also drive the blade to rotate, so that the lithium carbonate crystals can be crushed to directly obtain lithium carbonate powder, thereby improving the efficiency of the operation.

[0024] 2. In the utility model, steam can be guided into the interior of the treatment box through the air outlet pipe, and the lithium carbonate contained in the steam can be absorbed by the absorption liquid inside the treatment box, thereby preventing the lithium carbonate from being lost due to neat discharge, thereby improving the extraction quality of lithium carbonate and improving the utilization rate of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of a device for extracting lithium carbonate from salt lake brine in a salt lake chemical industry proposed by the utility model;

[0026] Figure 2 This is a front cross-sectional view of a device for extracting lithium carbonate from salt lake brine in a salt lake chemical industry proposed by the utility model;

[0027] Figure 3 This is a structural breakdown diagram of the motor part of a device for extracting lithium carbonate from salt lake brine in a salt lake chemical industry proposed by the utility model;

[0028] Figure 4 for Figure 3 A in the enlarged view;

[0029] Figure 5 This is a left side cross-sectional view of a processing box of a device for extracting lithium carbonate from salt lake brine in a salt lake chemical industry proposed by the utility model.

[0030] Legend:

[0031] 1. Evaporation barrel; 2. Telescopic rod; 3. Support plate; 4. Cover shell; 5. Motor; 6. Stirring rod; 7. Scraper; 8. Discharge pipe; 9. Blade; 10. Pressing plate; 11. Feed pipe; 12. First valve; 13. Support leg; 14. Processing box; 15. Exhaust pipe; 16. Exhaust pipe; 17. Drain pipe; 18. Second valve; 19. Heating pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the specification of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1 , Figure 3 and Figure 4 The utility model provides an embodiment: a device for extracting lithium carbonate from salt lake brine by salt lake chemical industry, comprising an evaporation barrel 1, a telescopic rod 2 is fixedly connected to the top of the outer wall of the evaporation barrel 1, a support plate 3 is fixedly connected to the output end of the telescopic rod 2, a motor 5 is arranged in the middle of the support plate 3, a stirring rod 6 is fixedly connected to the output end of the motor 5, a scraper 7 is fixedly connected to the middle of the stirring rod 6, the outer side of the scraper 7 is slidably connected to the inner wall of the evaporation barrel 1, a discharge pipe 8 is fixedly connected to the bottom of the evaporation barrel 1, a blade 9 is fixedly connected to the bottom of the stirring rod 6, the blade 9 is located inside the discharge pipe 8, a pressing plate 10 is rotatably connected to the middle and lower part of the stirring rod 6, the pressing plate 10 is located at the top of the discharge pipe 8, and a purification component is arranged outside the evaporation barrel 1.

[0034] By driving the motor 5, the stirring rod 6 and the scraper 7 can be driven to rotate, so that the lithium carbonate crystallized on the inner wall of the evaporation barrel 1 can be scraped off and dropped to the bottom of the evaporation barrel 1. After the lithium carbonate is crystallized, the telescopic rod 2 is driven to extend out of the output end, and the support plate 3 can be lifted at this time, and then the stirring rod 6 of the motor 5 can be lifted by the support plate 3. When the stirring rod 6 is lifted, the pressing plate 10 will be separated from the discharge pipe 8, and the crystallized lithium carbonate can be discharged from the discharge pipe 8. The stirring rotation can also drive the blade 9 to rotate. Therefore, when the crystallized lithium carbonate falls from the discharge pipe 8, the lithium carbonate crystals can be crushed by the rotation of the blade 9, so that the lithium carbonate powder can be directly obtained, thereby avoiding the phenomenon of crushing the lithium carbonate crystals again after taking them out, thereby improving the working efficiency.

[0035] Reference Figure 3 A groove is provided on the top of the discharge pipe 8, and the pressing plate 10 is located inside the groove. By pressing the pressing plate 10 against the inside of the groove, brine can be prevented from flowing out of the discharge pipe 8 directly.

[0036] Reference Figure 1-Figure 3 The top surface of the evaporation barrel 1 is fixedly connected with a feed pipe 11, and a first valve 12 is provided in the middle of the feed pipe 11. A plurality of legs 13 are fixedly connected to the bottom of the evaporation barrel 1. Brine can be poured into the interior of the evaporation barrel 1 through the feed pipe 11, and the interior of the evaporation barrel 1 can be controlled to be in a relatively sealed state by closing the valve, thereby avoiding excessive heat loss.

[0037] Reference Figure 2-Figure 3 A cover shell 4 is arranged on the outside of the motor 5, and the cover shell 4 is fixedly connected to the middle part of the support plate 3. The motor 5 can be protected by the cover shell 4.

[0038] Reference Figure 1 , Figure 2 and Figure 5 The purification assembly includes a treatment box 14, an air outlet pipe 15, an exhaust pipe 16 and a drain pipe 17. The treatment box 14 is fixedly connected to the top of the outer wall of the evaporation barrel 1, one end of the air outlet pipe 15 is fixedly connected to the top of the evaporation barrel 1, the middle of the air outlet pipe 15 is fixedly connected to the top of the treatment box 14, and the bottom of the air outlet pipe 15 is above the bottom surface of the inner wall of the treatment box 14, the exhaust pipe 16 is fixedly connected to one side of the top of the treatment box 14, the drain pipe 17 is fixedly connected to the bottom of the treatment box 14, and a second valve 18 is arranged in the middle of the drain pipe 17. The inside of the treatment box 14 is provided with an absorption liquid, and the bottom of the air outlet pipe 15 is lower than the liquid level of the absorption liquid, and the middle of the air outlet pipe 15 is provided with a one-way valve. The inside of the evaporation barrel 1 is provided with a heating pipe 19.

[0039] By arranging an absorption liquid inside the processing box 14, and the absorption liquid can use a calcium hydroxide solution, during the process of evaporating the brine, steam will be discharged from the bottom of the outlet pipe 15. When the steam contacts the absorption liquid, the absorption liquid can absorb the lithium carbonate in the steam, and the steam is discharged from the exhaust pipe 16. When the operation is completed, the absorption liquid and part of the lithium carbonate can be discharged and collected from the drain pipe 17 by opening the second valve 18, thereby avoiding the loss of lithium carbonate. In addition, by setting a one-way valve in the middle of the outlet pipe 15, it can be avoided that the absorption liquid flows back into the interior of the evaporation barrel 1.

[0040] Working principle: when in use, first open the first valve 12, then pour the brine into the interior of the evaporation barrel 1 along the feed pipe 11, and then pour the absorption liquid into the interior of the treatment box 14 along the exhaust pipe 16, and make the liquid level of the absorption liquid higher than the bottom of the outlet pipe 15, then close the first valve 12, and then open the heating pipe 19 to heat the evaporation barrel 1. As the temperature rises, the moisture in the brine will turn into water vapor and enter the interior of the treatment box 14 from the outlet pipe 15. When the steam is discharged from the bottom of the outlet pipe 15, the steam will contact the absorption liquid. At this time, the lithium carbonate carried in the steam can be absorbed by the absorption liquid. At this time, the steam can be discharged from the exhaust pipe 16, and the driving motor 5 can drive the stirring rod 6 to rotate, and the brine can be stirred by the stirring rod 6, and the stirring rod 6 can also drive the scraper 7 to rotate. The rotation of the scraper 7 can scrape off the crystallized lithium carbonate on the inner wall of the evaporation barrel 1 and make it fall on the steam. At the bottom of the barrel 1, when lithium carbonate crystallizes, the telescopic rod 2 is driven to extend out of the output end, and the support plate 3 can be lifted at this time, and then the motor 5 can be lifted by the support plate 3. The stirring rod 6, when the stirring rod 6 is lifted, the pressing plate 10 will be separated from the discharge pipe 8, and the crystallized lithium carbonate can be discharged from the discharge pipe 8, and the rotation of stirring can also drive the blade 9 to rotate, so when the crystallized lithium carbonate falls from the discharge pipe 8, the lithium carbonate crystals can be crushed by the rotation of the blade 9, so that lithium carbonate powder can be directly obtained, thereby avoiding the phenomenon of needing to crush the lithium carbonate crystals again after taking them out, thereby improving the operation efficiency, and when the operation is completed, the absorption liquid and part of the lithium carbonate can be discharged and collected from the drain pipe 17 by opening the second valve 18, so that the loss of lithium carbonate can be avoided, and the one-way valve set in the middle of the outlet pipe 15 can prevent the absorption liquid from flowing back into the interior of the evaporation barrel 1.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for extracting lithium carbonate from salt lake brine in salt lake chemical industry, comprising an evaporation drum (1), characterized in that: The top of the outer wall of the evaporation barrel (1) is fixedly connected to a telescopic rod (2), the output end of the telescopic rod (2) is fixedly connected to a support plate (3), a motor (5) is arranged in the middle of the support plate (3), the output end of the motor (5) is fixedly connected to a stirring rod (6), the middle part of the stirring rod (6) is fixedly connected to a scraper (7), the outer side of the scraper (7) is slidably connected to the inner wall of the evaporation barrel (1), the bottom of the evaporation barrel (1) is fixedly connected to a discharge pipe (8), the bottom of the stirring rod (6) is fixedly connected to a blade (9), the blade (9) is located inside the discharge pipe (8), the middle and lower part of the stirring rod (6) is rotatably connected to a pressing plate (10), the pressing plate (10) is located at the top of the discharge pipe (8), and a purification component is arranged outside the evaporation barrel (1).

2. The device for extracting lithium carbonate from salt lake brine by salt lake chemical industry according to claim 1, characterized in that: The top of the discharge pipe (8) is provided with a groove, and the pressing plate (10) is located inside the groove.

3. The device for extracting lithium carbonate from salt lake brine by salt lake chemical industry according to claim 1, characterized in that: A feed pipe (11) is fixedly connected to the top surface of the evaporation barrel (1), and a first valve (12) is provided in the middle of the feed pipe (11).

4. The device for extracting lithium carbonate from salt lake brine by salt lake chemical industry according to claim 1, characterized in that: A plurality of legs (13) are fixedly connected to the bottom of the evaporation barrel (1).

5. The device for extracting lithium carbonate from salt lake brine by salt lake chemical industry according to claim 1, characterized in that: A cover shell (4) is arranged on the outside of the motor (5), and the cover shell (4) is fixedly connected to the middle part of the support plate (3).

6. The device for extracting lithium carbonate from salt lake brine by salt lake chemical industry according to claim 1, characterized in that: The purification component comprises a treatment box (14), an air outlet pipe (15), an exhaust pipe (16) and a drain pipe (17); the treatment box (14) is fixedly connected to the top of the outer wall of the evaporation barrel (1); one end of the air outlet pipe (15) is fixedly connected to the top of the evaporation barrel (1); the middle of the air outlet pipe (15) is fixedly connected to the top of the treatment box (14); and the bottom of the air outlet pipe (15) is located above the bottom surface of the inner wall of the treatment box (14); the exhaust pipe (16) is fixedly connected to one side of the top of the treatment box (14); the drain pipe (17) is fixedly connected to the bottom of the treatment box (14); and a second valve (18) is provided in the middle of the drain pipe (17).

7. The device for extracting lithium carbonate from salt lake brine by salt lake chemical industry according to claim 6, characterized in that: The processing box (14) is provided with absorption liquid inside, and the bottom of the outlet pipe (15) is lower than the liquid level of the absorption liquid. A one-way valve is provided in the middle of the outlet pipe (15).

8. The device for extracting lithium carbonate from salt lake brine by salt lake chemical industry according to claim 1, characterized in that: A heating tube (19) is arranged inside the evaporation barrel (1).

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