Production filtering device for lithium hydroxide

Abstract

The utility model mainly relates to the technical field of lithium hydroxide production, in particular to a lithium hydroxide production filtering device which comprises a frame, a sliding driving piece and a plurality of sliding filtering modules, and the sliding filtering modules are sequentially connected in the frame in a sliding mode in the length direction of the frame. The sliding filtering module on the outermost side is connected with the driving end of the sliding driving part; when the sliding driving piece drives the corresponding sliding filtering module to be far away from the adjacent sliding filtering module, the first connecting rod pulls the next sliding filtering module in sequence, so that the sliding filtering modules are switched from a mutually-pressed use state to a mutually-separated release state; the device has the beneficial effects that all the sliding filtering modules can be separated by driving one sliding filtering module to slide through the sliding driving piece instead of separating each sliding filtering module one by one by virtue of a reciprocating separator, so that the separation efficiency is greatly improved, and the filtering efficiency of lithium hydroxide is further improved.

Description

Technical Field

[0001] This invention relates to the technical field of lithium hydroxide production, and particularly to a lithium hydroxide production filtration device. Background Technology

[0002] Lithium hydroxide can be prepared by the causticization of lithium carbonate and the causticization of lithium sulfate.

[0003] For the lithium carbonate causticization method, lithium carbonate needs to be mixed with refined lime slurry, the concentration of the causticization solution is adjusted, heated to boiling, and vigorously stirred, resulting in the following reaction:

[0004] Li2CO3+Ca(OH)2→2LiOH+CaCO3↓

[0005] In the lithium sulfate causticization process, spodumene concentrate undergoes transformation roasting, followed by acid roasting, and leaching to obtain a lithium sulfate solution. After the solution is evaporated and concentrated to a predetermined concentration, a caustic soda solution is added, which reacts to precipitate sodium sulfate. The specific reaction process is as follows:

[0006] Li₂SO₄ + 2NaOH → 2LiOH + Na₂SO₄

[0007] In both of the above processes, the products need to undergo crystallization, separation, sedimentation, and filtration to obtain the desired lithium hydroxide product.

[0008] In existing technologies, plate filters are often used to remove precipitates from the mixture. However, in traditional plate filters, the plate is also a sliding filter module. When adjacent sliding filter modules separate from each other, it relies on a reciprocating separator. This results in low separation efficiency between adjacent sliding filter modules and reduces the production efficiency of lithium hydroxide. Utility Model Content

[0009] (a) Technical problems to be solved

[0010] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a lithium hydroxide production filtration device, which solves the technical problem of low efficiency in the prior art where the separator relies on reciprocating motion to separate adjacent sliding filter modules.

[0011] (II) Technical Solution

[0012] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0013] In a first aspect, this utility model provides a lithium hydroxide production filtration device, including a frame, a sliding drive component, and multiple sliding filter modules. The sliding filter modules are sequentially slidably connected within the frame along its length, and the outermost sliding filter module is connected to the drive end of the sliding drive component. It also includes multiple first connecting rods extending axially along the length of the frame and corresponding one-to-one with the sliding filter modules. One end of each first connecting rod is fixedly connected to the preceding adjacent sliding filter module, and the other end of each first connecting rod passes through the following adjacent sliding filter module to form a first limiting end. When the sliding drive component drives the corresponding sliding filter module away from the adjacent sliding filter module, the first connecting rod sequentially pulls the following sliding filter module, thereby switching the sliding filter modules from a mutually pressed state to a mutually separated state.

[0014] (III) Beneficial Effects

[0015] The beneficial effects of this invention are as follows: The lithium hydroxide production filtration device of this invention not only provides solid support for the entire device with its frame, but also ensures precise alignment and stable connection between the components. The fixed filtration module is firmly installed at one end of the frame, serving as the reference point and starting point of the filtration system. Its stable position ensures the reliability and consistency of the filtration process.

[0016] Multiple sliding filter modules are arranged sequentially along the length of the frame, connected to it by sliding joints. This design not only allows the modules to move linearly back and forth on the frame but also ensures smooth and flexible movement. All sliding filter modules are located on the same side of the fixed filter modules, forming an orderly and efficient filtering sequence. The farthest sliding filter module is fixedly connected to the drive end of the sliding actuator, which precisely controls the module's position movement, ensuring the reliability of the sliding filter module during state switching.

[0017] When the sliding drive component moves the corresponding sliding filter module away from the fixed filter module, the module sequentially pulls the next sliding filter module through the first connecting rod, realizing a chain reaction-like movement. As the first sliding filter module continues to slide, all adjacent sliding filter modules, as well as adjacent sliding filter modules and the fixed filter module, can be separated from each other, realizing the linkage of all sliding filter modules. Therefore, the filtration device in this utility model does not need to rely on a reciprocating separator to separate each sliding filter module one by one. Instead, it can complete the separation of all sliding filter modules by driving one sliding filter module to slide through the sliding drive component, which greatly improves the separation efficiency and thus improves the filtration efficiency of lithium hydroxide. Attached Figure Description

[0018] Figure 1This is one of the structural schematic diagrams of the lithium hydroxide production filtration device of this utility model;

[0019] Figure 2 This is a schematic diagram of the sliding drive component of this utility model in the disengaged state;

[0020] Figure 3 This is the second schematic diagram of the structure of the lithium hydroxide production filtration device of this utility model;

[0021] Figure 4 This is the third schematic diagram of the structure of the lithium hydroxide production filtration device of this utility model;

[0022] Figure 5 This utility model Figure 3 A magnified schematic diagram of the local structure at point X;

[0023] Figure 6 This utility model Figure 4 A magnified schematic diagram of the local structure at point Y;

[0024] Figure 7 This utility model Figure 3 A magnified schematic diagram of the local structure at point Z;

[0025] Figure 8 This is the fourth schematic diagram of the lithium hydroxide production filtration device of this utility model.

[0026] [Explanation of Labels in the Attached Image]

[0027] 100: Separator

[0028] 1: Frame; 11: Track; 12: End plate;

[0029] 2: Fixed filter module;

[0030] 4: Sliding filter module;

[0031] 5: First connecting rod;

[0032] 6: Second connecting rod;

[0033] 7: Slider;

[0034] 8: Slag removal device; 81: Comb teeth. Detailed Implementation

[0035] To better explain and facilitate understanding of this utility model, the following description is provided in conjunction with the appendix. Figures 1-8 This invention will be described in detail through specific embodiments. Wherein, directional terms such as "upper" and "lower" mentioned herein are used in a specific manner. Figure 1 The orientation is used as a reference.

[0036] Example 1:

[0037] Reference Figures 1-8 This utility model provides a lithium hydroxide production filtration device, including a frame 1, a fixed filtration module 2, a sliding drive component, and multiple sliding filtration modules 4. The fixed filtration module 2 is fixedly connected to the frame 1. The multiple sliding filtration modules 4 are slidably connected to the frame 1 along the length of the frame 1, and are all located on one side of the fixed filtration module 2. The sliding filtration module 4 furthest from the fixed filtration module 2 is fixedly connected to the drive end of the sliding drive component. A filtration chamber is formed between adjacent sliding filtration modules 4 and between the sliding filtration modules 4 and the fixed filtration module 2. The device also includes multiple first connecting rods 5 extending along the length of the frame 1 and corresponding one-to-one with the sliding filtration modules. The multiple sliding filtration modules 4 are arranged in a distributed manner. One end of the first connecting rod 5 is fixedly connected to the preceding adjacent sliding filtration module 4, and the other end of the first connecting rod 5 passes through the following adjacent sliding filtration module 4 to form a first limiting end. When the sliding drive component drives the corresponding sliding filtration module 4 away from the adjacent sliding filtration module 4, the first connecting rod 5 sequentially pulls the following sliding filtration module 4, so that the sliding filtration modules 4 switch from a mutually pressed state to a mutually separated state.

[0038] In this embodiment, frame 1 not only provides solid support for the entire device, but also ensures precise alignment and stable connection between the components. The fixed filter module 2 is firmly installed at one end of frame 1, serving as the reference point and starting point of the filtration system. Its stable position ensures the reliability and consistency of the filtration process.

[0039] Along the length of frame 1, multiple sliding filter modules 4 are arranged sequentially, and they are slidably connected to frame 1. This design not only allows the modules to move linearly back and forth on frame 1, but also ensures the smoothness and flexibility of the movement. All sliding filter modules 4 are located on the same side of the fixed filter module 2, forming an orderly and efficient filtering sequence. The farthest sliding filter module 4 is fixedly connected to the drive end of the sliding drive component, which can precisely control the position movement of this module, ensuring the reliability of the sliding filter module 4 when switching states.

[0040] Specifically, the filtration principles of the sliding filter module 4 and the fixed filter module 2 are generally the same as those of existing plate filters. There are no improvements to the filtration principles other than existing technologies, so they will not be elaborated here.

[0041] The mixture produced in lithium hydroxide production flows through the filter chamber, where the filter residue remains, and the filtrate is discharged through the drain pipes on the sliding filter module 4 and the fixed filter module 2.

[0042] When the sliding drive component drives the corresponding sliding filter module 4 away from the fixed filter module 2, the module sequentially pulls the next sliding filter module 4 through the first connecting rod 5, realizing a chain reaction-like movement. As the first sliding filter module 4 continues to slide, all adjacent sliding filter modules 4, as well as adjacent sliding filter modules 4 and the fixed filter module 2, can be separated from each other, realizing the linkage of all sliding filter modules 4. Therefore, the filtration device in this utility model does not need to rely on the reciprocating separator 100 to separate each sliding filter module 4 one by one. Instead, it can complete the separation of all sliding filter modules 4 by driving one sliding filter module 4 to slide through the sliding drive component, which greatly improves the separation efficiency and thus improves the filtration efficiency of lithium hydroxide.

[0043] When in use, the modules are closely arranged, and the filter chamber space is compressed to an optimal state, which is conducive to achieving a highly efficient filtration effect. When detached, the modules are fully separated, which greatly facilitates the cleaning, maintenance and removal of filter residue.

[0044] Example 2:

[0045] Reference Figures 1-8 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0046] In two adjacent sliding filter modules 4, one end of the first connecting rod 5 is fixedly connected to the sliding filter module 4 that is further away from the fixed filter module 2, and the other end of the first connecting rod 5 passes through the sliding filter module 4 that is closer to the fixed filter module 2 to form a first limiting end. That is, the first connecting rod 5 is set sequentially starting from the first sliding filter module 4 that is furthest away from the fixed filter module 2, thereby ensuring the continuity of the sliding of the sliding filter module 4 and ensuring the separation effect between adjacent sliding filter modules 4.

[0047] Specifically, the length of the first connecting rod 5 should not be too long, so as to avoid the problem of the sliding filter module 4 not being pressed tightly due to the interference of the length of the first connecting rod 5 when the sliding filter module 4 is switched to the use state.

[0048] More specifically, adjacent first connecting rods 5 should be staggered to avoid interference between adjacent first connecting rods 5 and to improve space utilization.

[0049] Example 3:

[0050] Reference Figures 1-8 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0051] The lithium hydroxide production filtration device also includes a second connecting rod 6 extending along the length of the frame 1. One end of the second connecting rod 6 is fixedly connected to the sliding filter module 4 closest to the fixed filter module 2. The other end of the second connecting rod 6 passes through the fixed filter module 2 to form a second limiting end. The second connecting rod is not set up to establish a linkage between the fixed filter module 2 and the sliding filter module 4, but to limit the position of the sliding filter module 4 closest to the fixed filter module 2, so that it is within a predetermined range when sliding, avoiding excessive separation from the fixed filter module 2. It can also ensure that the sliding filter module 4 can overcome the friction between itself and the first connecting rod 5 and separate from each other when the sliding drive component drives the corresponding sliding filter module 4 to slide, thereby improving the reliability of the filtration device.

[0052] Specifically, the first connecting rod 5 and the second connecting rod 6 can have the same structure, and a clearance opening can also be provided on the frame 1 to allow space for the second connecting rod 6.

[0053] Example 4:

[0054] Reference Figures 1-8 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0055] Both the fixed filter module 2 and the sliding filter module 4 have sliders 7 extending from them. The frame 1 includes a track 11, and the sliders 7 are slidably connected to the track 11.

[0056] In this embodiment, the frame 1 includes two end plates 12 and two tracks 11. The two tracks 11 are arranged in parallel, and the two end plates 12 are fixedly connected to the two ends of the two tracks 11. The fixed filter module 2 is fixedly connected to the side wall of one end plate 12 facing the other end plate 12.

[0057] The slider 7 is also set as two sets corresponding to the two tracks 11. With the interaction and cooperation of the slider 7 and the track 11, the stability of the sliding filter module 4 during sliding is improved, thereby improving the stability of its switching to the disengaged state.

[0058] One end of the first connecting rod 5 and the second connecting rod 6 are fixedly connected to the slider 7, and the other end of the first connecting rod 5 and the second connecting rod 6 passes through the corresponding slider 7. Since the slider 7 is an extension of the sliding filter module 4 and the fixed filter module 2, the cooperation between the first connecting rod 5 and the second connecting rod 6 and the slider 7 will not affect the original filtration function and filtration structure of the sliding filter module 4 and the fixed filter module 2. This provides a basis for improving the device based on the existing plate filter structure, which is beneficial to reducing process costs.

[0059] One end of the first connecting rod 5 and the second connecting rod 6 is threadedly connected to the corresponding slider 7. That is, the first connecting rod 5 and the second connecting rod 6 can be configured as bolts with threads on one end, further reducing process costs. At the same time, the threaded connection makes it easier to disassemble and assemble the first connecting rod 5 and the second connecting rod 6, thereby improving the maintenance efficiency of the lithium hydroxide production filtration device.

[0060] Example 5:

[0061] Reference Figures 1-8 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0062] The lithium hydroxide production filtration device also includes a slag removal device 8, which is adapted to remove filter residue from the filter chamber when the sliding filter module 4 is switched to the detached state. The slag removal device 8 includes a telescopic drive component and multiple comb teeth 81 connected as one unit. The telescopic end of the telescopic drive component is fixedly connected to the comb teeth 81 so that the comb teeth 81 can slide and switch between the detached position from the filter chamber and the push position inserted into the filter chamber. When the sliding filter module 4 is switched to the detached state, the comb teeth 81 correspond one-to-one with the filter chamber so that the filter residue in the filter chamber is removed when the comb teeth 81 switch from the detached state to the working state.

[0063] In this embodiment, after the sliding filter module 4 switches to the disengaged state, it can not only rely on the weight of the filter cake itself to detach from the filter chamber, but also, with the assistance of the slag removal device 8, more thoroughly clean the filter cake in the filter chamber. The comb teeth 81 are plate-shaped, and when inserted into the filter chamber, they can push out the filter cake. Specifically, the slag removal device 8 can be set above the filter chamber, so that the slag removal device 8 can clean the filter cake from top to bottom, and with the help of gravity, improve the cleaning effect of the filter cake. At the same time, setting the slag removal device 8 above the filter chamber can save the lateral space of the device and improve the structural compactness.

[0064] Example 6:

[0065] Reference Figures 1-8 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0066] The comb teeth 81 are also provided with media holes, and the slag removal device 8 also includes a media pump that communicates with the media holes to output cleaning media when the comb teeth 81 are inserted into the filter chamber, thereby improving the thoroughness of slag removal and indirectly improving the performance of the lithium hydroxide production filtration device.

[0067] It can be understood that, except for conflicting parts, the above embodiments 1-6 can be freely combined to form other embodiments of this utility model.

[0068] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0070] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0071] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0072] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A filtration device for the production of lithium hydroxide, characterized in that: It includes a frame (1), a sliding drive and multiple sliding filter modules (4), the sliding filter modules (4) are slidably connected to the frame (1) in sequence along the length direction of the frame, and the outermost sliding filter module (4) is connected to the drive end of the sliding drive. It also includes a plurality of first connecting rods (5) that extend axially along the length direction of the frame (1) and correspond one-to-one with the sliding filter modules. The plurality of sliding filter modules (4) are arranged in a distributed manner. One end of the first connecting rod (5) is fixedly connected to the previous one of the adjacent sliding filter modules (4), and the other end of the first connecting rod (5) passes through the next one of the adjacent sliding filter modules (4) to form a first limiting end. When the sliding drive unit drives the corresponding sliding filter module (4) away from the adjacent sliding filter module (4), the first connecting rod (5) sequentially pulls the next sliding filter module (4) so ​​that the sliding filter module (4) switches from the mutually pressed state to the mutually separated state.

2. The lithium hydroxide production filtration device as described in claim 1, characterized in that: It also includes a fixed filter module (2), which is fixedly connected to the frame (1). The sliding filter modules (4) are all located on one side of the fixed filter module (2). The sliding filter module (4) furthest from the fixed filter module (2) is fixedly connected to the driving end of the sliding drive. A filter cavity is formed between adjacent sliding filter modules (4) and between adjacent sliding filter modules (4) and the fixed filter module (2).

3. The lithium hydroxide production filtration device as described in claim 2, characterized in that: In two adjacent sliding filter modules (4), one end of the first connecting rod (5) is fixedly connected to the sliding filter module (4) that is further away from the fixed filter module (2), and the other end of the first connecting rod (5) passes through the sliding filter module (4) that is closer to the fixed filter module (2) to form the first limiting end.

4. The lithium hydroxide production filtration device as described in claim 3, characterized in that: It also includes a second connecting rod (6) extending axially along the length direction of the frame (1). One end of the second connecting rod (6) is fixedly connected to the sliding filter module (4) closest to the fixed filter module (2), and the other end of the second connecting rod (6) passes through the fixed filter module (2) to form a second limiting end.

5. The lithium hydroxide production filtration apparatus as described in claim 4, characterized in that: Both the fixed filter module (2) and the sliding filter module (4) have sliders (7) extending out. The frame (1) includes a track (11), and the slider (7) is slidably connected to the track (11).

6. The lithium hydroxide production filtration apparatus as described in claim 5, characterized in that: The first connecting rod (5) and the second connecting rod (6) have the same structure. One end of the first connecting rod (5) and the second connecting rod (6) are fixedly connected to the slider (7), and the other end of the first connecting rod (5) and the second connecting rod (6) passes through the corresponding slider (7).

7. The lithium hydroxide production filtration apparatus as described in claim 6, characterized in that: One end of the first connecting rod (5) and the second connecting rod (6) is threadedly connected to the corresponding slider (7).

8. The lithium hydroxide production filtration apparatus according to any one of claims 2-7, characterized in that: It also includes a slag removal device (8), which is adapted to remove filter residue in the filter chamber when the sliding filter module (4) is switched to the disengaged state.

9. The lithium hydroxide production filtration device as described in claim 8, wherein the slag removal device (8) includes a telescopic drive and a plurality of comb teeth (81) connected as one piece, wherein the telescopic end of the telescopic drive is fixedly connected to the comb teeth (81) so that the comb teeth (81) can slide and switch between the disengaged position of being pulled out of the filter chamber and the push position of being inserted into the filter chamber. When the sliding filter module (4) switches to the disengaged state, the comb teeth (81) correspond one-to-one with the filter chamber, so as to remove the filter residue in the filter chamber when the comb teeth (81) switch from the disengaged state to the used state.

10. The lithium hydroxide production filtration apparatus as described in claim 9, characterized in that: The comb teeth (81) are also provided with media holes, and the slag removal device (8) also includes a media pump communicating with the media holes to output cleaning media when the comb teeth (81) are inserted into the filter chamber.

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