Crystallizer for producing lithium sulfate solution

Abstract

The utility model discloses a crystallizer for lithium sulfate solution production, which comprises a crystallizing tank, support bases are mounted on two sides of the bottom end of the crystallizing tank, a discharge port is mounted at the bottom end of the crystallizing tank, a seal cover is mounted at the bottom end of the discharge port, collecting covers are mounted on two sides of the discharge port, and connecting pipes are mounted at the top ends of the collecting covers. One end of the connecting pipe is connected with an air guide pipe, and feeding holes are formed in the two sides of the top end of the crystallizing tank. The stirring motor is started to drive the fixed block to rotate under the cooperation of the stirring shaft, and meanwhile, the connecting rod is thrown out of the fixed block under the action of centrifugal force, so that the position of the stirring block is adjusted, and the purpose of fully stirring a solution in the crystallizing tank is achieved through the operation; and the solution in the crystallizing tank is uniformly heated, so that the crystallization quality of the lithium sulfate solution is improved, the crystallization speed of the lithium sulfate solution is accelerated, and the working efficiency of lithium sulfate solution production is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium sulfate solution production, in particular to a crystallizer for lithium sulfate solution production. Background Art

[0002] At present, lithium sulfate is the main electrode material for new energy batteries. In the process of extracting lithium from ore by sulfuric acid method, the ore is generally first ground, roasted, acidified, leached, purified, filtered and other processes to obtain a relatively pure lithium sulfate dilute solution. The dilute lithium sulfate solution is mainly used for the subsequent production of lithium chloride, lithium hydroxide or lithium carbonate and other products. In order to reduce the consumption of the subsequent production of lithium chloride, lithium hydroxide or lithium carbonate, it is necessary to evaporate and concentrate the dilute lithium sulfate to about 20%. The purpose of lithium sulfate evaporation and concentration is to make it reach a supersaturated state through high-temperature evaporation and dehydration. The saturated solution after evaporation and concentration enters the continuous crystallization system to produce lithium sulfate crystal products.

[0003] In a device for extracting lithium carbonate crystals from salt lake brine with publication number CN209835655U, a vertical crystallization tank, a refinement part arranged in the vertical crystallization tank, a driving motor and a circular cover plate arranged on the top of the vertical crystallization tank are provided. The top of the vertical crystallization tank is open, and the bottom of the inner cavity is conical. In the utility model, the bearing shaft on the refinement part is connected to the driving motor on the circular cover plate, and the two roller devices at the bottom of the refinement part are in compression contact with the bottom surface of the conical shape of the bottom of the inner cavity of the vertical crystallization tank. The roller device is driven to rotate by the driving motor. Due to the crystallization The body has good brittleness, so the crystals can be crushed by rolling the roller thereon, which saves effort, and the entire refinement part can be removed along with the circular cover plate, which does not affect the heating and evaporation use of the vertical crystallization tank. The above-mentioned existing technology has the following defects when used: When the above-mentioned existing technology is used, the solution is directly placed inside the vertical crystallization tank, and lithium carbonate is obtained by heating the vertical crystallization tank. However, in actual use, the solution inside the vertical crystallization tank is easily heated unevenly, which leads to a low crystallization rate of the lithium sulfate solution, thereby affecting the quality of the crystallization of the lithium sulfate solution. Utility Model Content

[0004] The utility model aims to provide a crystallizer for producing lithium sulfate solution, so as to solve the problem that the existing crystallizer for producing lithium sulfate solution mentioned in the above background technology is easy to cause the solution inside thereof to be heated unevenly during use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a crystallizer for producing lithium sulfate solution, comprising a crystallizer, support bases are installed on both sides of the bottom end of the crystallizer, a discharge port is installed on the bottom end of the crystallizer, and a sealing cover is installed on the bottom end of the discharge port, a collecting cover is installed on both sides of the discharge port, and a connecting pipe is installed on the top of the collecting cover, one end of the connecting pipe is connected to an air guide pipe, a feed port is provided on both sides of the top end of the crystallizer, a stirring motor is installed on the top end of the crystallizer, a stirring shaft is installed on the bottom end of the stirring motor, and a stirring mechanism is evenly provided on the outside of the stirring shaft extending to the inside of the crystallizer, a scraper is installed on the outside of the stirring shaft at the top end of the stirring mechanism, a grinding block is installed on the bottom end of the stirring shaft, an installation groove is provided inside the crystallizer, and a heating wire is installed inside the installation groove, a collecting box is installed on one side of the back side of the crystallizer, and a first filter plate is installed inside the collecting box, a second filter plate is installed inside the collecting box at the top end of the first filter plate, and an exhaust fan is installed on the top of the collecting box.

[0006] When a crystallizer for producing a lithium sulfate solution according to the technical solution is used, a stirring mechanism is provided to facilitate sufficient stirring of the solution inside the crystallization tank in cooperation with a scraper, so that the solution inside the crystallization tank is heated evenly, thereby increasing the crystallization speed of the lithium sulfate solution.

[0007] Preferably, the stirring mechanism includes a fixed block, and the fixed block is arranged on one side of the stirring shaft, a return spring is arranged inside the fixed block, and a stopper is installed on one side of the return spring, a connecting rod is installed on one side of the stopper, and the stirring block is installed on one side of the connecting rod.

[0008] Preferably, the connecting rods and the stirring blocks are provided in multiple groups, and the cross-section formed by the multiple groups of connecting rods and the stirring blocks is T-shaped.

[0009] Preferably, the return springs are provided in multiple groups, and the multiple groups of return springs are distributed at equal intervals.

[0010] Preferably, the heating wire is evenly wound inside the crystallization tank, and the cross-section of the heating wire is circular.

[0011] Preferably, two groups of scrapers are provided, one side of the two groups of scrapers is provided with a rubber strip, and the two groups of scrapers are distributed in a cross shape.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the crystallizer for producing lithium sulfate solution not only allows the internal solution to be heated evenly, but also has a dust removal function;

[0013] By starting the stirring motor, the fixed block is driven to rotate in cooperation with the stirring shaft, and the connecting rod is thrown out from the inside of the fixed block under the action of centrifugal force, so as to adjust the position of the stirring block. The above operation is used to fully stir the solution inside the crystallizer, so that the solution inside the crystallizer is heated evenly, thereby improving the crystallization quality of the lithium sulfate solution, accelerating the crystallization speed of the lithium sulfate solution, and then improving the work efficiency of the lithium sulfate solution production;

[0014] By starting the exhaust fan to generate adsorption force inside the collection box, the adsorption force is transmitted to the inside of the connecting pipe with the cooperation of the air duct and discharged at the collection cover, thereby adsorbing the dust generated by the unloading of materials. The adsorbed dust is transported to the inside of the collection box through the air duct. By providing a first filter plate and a second filter plate, the air containing dust can be filtered to meet the emission standards. Through the above operation, the dust generated by the unloading of materials can be adsorbed to avoid the flying phenomenon, thereby reducing the impact of dust on the staff and the working environment, and then improving its practicality to cope with different usage situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model in a side view;

[0018] Figure 3 For the utility model Figure 1 Schematic diagram of the structure at A in the middle;

[0019] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the utility model in a top view;

[0020] Figure 5 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0021] Explanation of the reference numerals in the figure: 1. Crystallization tank; 2. Mounting groove; 3. Support base; 4. Sealing cover; 5. Discharge port; 6. Collecting cover; 7. Grinding block; 8. Heating wire; 9. Stirring shaft; 10. Stirring mechanism; 1001. Connecting rod; 1002. Stirring block; 1003. Fixed block; 1004. Stop block; 1005. Return spring; 11. Stirring motor; 12. Feed port; 13. Scraper; 14. Connecting pipe; 15. Air duct; 16. Collecting box; 17. First filter plate; 18. Second filter plate; 19. Exhaust fan. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment 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.

[0023] See also Figure 1-5 , the utility model provides an embodiment: a crystallizer for lithium sulfate solution production, comprising a crystallizer 1, a supporting base 3 is installed on both sides of the bottom end of the crystallizer 1, a discharge port 5 is installed at the bottom end of the crystallizer 1, and a sealing cover 4 is installed at the bottom end of the discharge port 5, a collecting cover 6 is installed on both sides of the discharge port 5, and a connecting pipe 14 is installed at the top of the collecting cover 6, one end of the connecting pipe 14 is connected to an air guide pipe 15, a feed port 12 is arranged on both sides of the top of the crystallizer 1, a stirring motor 11 is installed at the top of the crystallizer 1, a stirring shaft 9 is installed at the bottom end of the stirring motor 11, and the stirring shaft 9 extends to the outside of the crystallizer 1 and is evenly provided with a stirring mechanism 10;

[0024] The stirring mechanism 10 includes a fixed block 1003, and the fixed block 1003 is arranged on one side of the stirring shaft 9, a return spring 1005 is arranged inside the fixed block 1003, and a stopper 1004 is installed on one side of the return spring 1005, a connecting rod 1001 is installed on one side of the stopper 1004, and a stirring block 1002 is installed on one side of the connecting rod 1001;

[0025] There are multiple groups of connecting rods 1001 and stirring blocks 1002, and the cross section formed by the multiple groups of connecting rods 1001 and stirring blocks 1002 is T-shaped;

[0026] There are multiple groups of return springs 1005, and the multiple groups of return springs 1005 are distributed at equal intervals;

[0027] Specifically, Figure 1 , 34, when in use, the stirring motor 11 is started to drive the fixed block 1003 to rotate with the cooperation of the stirring shaft 9, and the connecting rod 1001 is thrown out from the inside of the fixed block 1003 under the action of centrifugal force, so as to adjust the position of the stirring block 1002, and then the solution inside the crystallization tank 1 is stirred to make it evenly heated, thereby increasing the crystallization speed;

[0028] The outer side of the stirring shaft 9 at the top of the stirring mechanism 10 is equipped with a scraper 13;

[0029] Two groups of scrapers 13 are provided, and a rubber strip is provided on one side of the two groups of scrapers 13, and the two groups of scrapers 13 are distributed in a cross shape;

[0030] Specifically, Figure 1 , 4 As shown, when in use, by providing a rubber strip, on the one hand, the lithium sulfate solution crystallized on the inner wall of the crystallizer 1 can be scraped to prevent it from remaining on the inner wall of the crystallizer 1, and on the other hand, it can also play a certain degree of stirring effect, thereby further improving the effect of stirring the solution inside the crystallizer 1;

[0031] A grinding block 7 is installed at the bottom end of the stirring shaft 9, a mounting groove 2 is provided inside the crystallization tank 1, and a heating wire 8 is installed inside the mounting groove 2;

[0032] The heating wire 8 is evenly wound inside the crystallization tank 1, and the cross section of the heating wire 8 is circular;

[0033] A collecting box 16 is installed on one side of the back of the crystallization tank 1, and a first filter plate 17 is installed inside the collecting box 16, a second filter plate 18 is installed inside the collecting box 16 at the top of the first filter plate 17, and an exhaust fan 19 is installed at the top of the collecting box 16;

[0034] Specifically, Figure 1 , 2 As shown, when in use, by providing a heating wire 8, the temperature inside the crystallization tank 1 can be increased, thereby accelerating the evaporation of the solution inside the crystallization tank 1 and causing it to crystallize quickly, thereby improving the production efficiency.

[0035] Working principle: When the utility model is used, first, the solution is introduced into the interior of the crystallization tank 1 through the feed port 12, and the heating wire 8 is started to heat the solution inside the crystallization tank 1. During the heating process, the stirring motor 11 is started to drive the stirring shaft 9 to rotate. The stirring shaft 9 rotates and drives the fixed block 1003 to rotate at the same time, so that the fixed block 1003 rotates and the connecting rod 1001 is thrown out from the interior of the fixed block 1003, so as to adjust the position of the stirring block 1002, and then the purpose of fully stirring the solution inside the crystallization tank 1 is achieved, so that the solution inside the crystallization tank 1 can be quickly crystallized, thereby improving work efficiency;

[0036] Secondly, after the solution inside the crystallizer 1 is crystallized, the stirring motor 11 is continuously started to drive the grinding block 7 and the scraper 13 to perform rotational motion under the cooperation of the stirring shaft 9, so that a part falls into the motion range of the grinding block 7 under the action of the weight of the lithium sulfate solution crystals themselves, and the lithium sulfate solution crystals are powdered, and a part of the lithium sulfate solution crystals remaining on the inner wall of the crystallizer 1 are scraped while the scraper 13 performs rotational motion, so that they fall into the range of the grinding block 7, thereby grinding the residual lithium sulfate solution crystals to reach the degree of powderization, and the above operation is convenient to improve the quality of the finished product;

[0037] Finally, when the lithium sulfate solution crystals that have reached the standard are unloaded and packaged through the discharge port 5, a lot of dust will be generated in the process of unloading and packaging. By starting the exhaust fan 19, an adsorption force is generated inside the collection box 16. These adsorption forces are transported to the inside of the connecting pipe 14 through the air duct 15 and discharged from the collection cover 6, thereby adsorbing the generated dust. The adsorbed dust is transported to the inside of the collection box 16 through the air duct 15, and the first filter plate 17 and the second filter plate 18 are provided to filter the air containing dust so that it meets the emission standards and is then discharged from the exhaust fan 19. The above operation facilitates the adsorption of the dust generated by unloading, thereby reducing the impact of dust on the health of workers.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A crystallizer for producing lithium sulfate solution, comprising a crystallization tank (1), characterized in that: Support bases (3) are installed on both sides of the bottom of the crystallizer (1), a discharge port (5) is installed on the bottom of the crystallizer (1), and a sealing cover (4) is installed on the bottom of the discharge port (5), collecting covers (6) are installed on both sides of the discharge port (5), and a connecting pipe (14) is installed on the top of the collecting cover (6), one end of the connecting pipe (14) is connected to an air guide pipe (15), a feed port (12) is provided on both sides of the top of the crystallizer (1), a stirring motor (11) is installed on the top of the crystallizer (1), a stirring shaft (9) is installed on the bottom of the stirring motor (11), and the stirring shaft (9) extends into the interior of the crystallizer (1). A stirring mechanism (10) is evenly arranged on the outside of the crystallization tank (1), a scraper (13) is installed on the outside of the stirring shaft (9) at the top of the stirring mechanism (10), a grinding block (7) is installed at the bottom of the stirring shaft (9), a mounting groove (2) is arranged inside the crystallization tank (1), and a heating wire (8) is installed inside the mounting groove (2), a collecting box (16) is installed on one side of the back of the crystallization tank (1), and a first filter plate (17) is installed inside the collecting box (16), a second filter plate (18) is installed inside the collecting box (16) at the top of the first filter plate (17), and an exhaust fan (19) is installed at the top of the collecting box (16).

2. A crystallizer for producing a lithium sulfate solution according to claim 1, characterized in that: The stirring mechanism (10) comprises a fixed block (1003), and the fixed block (1003) is arranged on one side of the stirring shaft (9), a return spring (1005) is arranged inside the fixed block (1003), and a stopper (1004) is installed on one side of the return spring (1005), a connecting rod (1001) is installed on one side of the stopper (1004), and a stirring block (1002) is installed on one side of the connecting rod (1001).

3. A crystallizer for producing a lithium sulfate solution according to claim 2, characterized in that: The connecting rods (1001) and the stirring blocks (1002) are provided in multiple groups, and the cross-section formed by the multiple groups of connecting rods (1001) and the stirring blocks (1002) is T-shaped.

4. A crystallizer for producing a lithium sulfate solution according to claim 2, characterized in that: The return springs (1005) are provided in multiple groups, and the multiple groups of return springs (1005) are distributed at equal intervals.

5. A crystallizer for producing a lithium sulfate solution according to claim 1, characterized in that: The heating wire (8) is evenly wound inside the crystallization tank (1), and the cross section of the heating wire (8) is circular.

6. A crystallizer for producing a lithium sulfate solution according to claim 1, characterized in that: Two groups of scrapers (13) are provided, one side of each of the two groups of scrapers (13) is provided with a rubber strip, and the two groups of scrapers (13) are distributed in a cross shape.

Images