CN212594376U - Lithium carbonate solution filter equipment - Google Patents

Abstract

The utility model provides a lithium carbonate solution filter equipment, the purpose is solved the poor technical problem of current filter effect. The device includes that the bottom is equipped with the filtration jar of toper portion, and the lateral wall of filtration jar is equipped with the inlet above the toper portion, filters the jar intracavity and is equipped with filter core and rotary mechanism through the mounting panel, and filter core upper end intercommunication has the clear solution branch pipe, and the filtration jar lateral wall of mounting panel top is equipped with the clear solution mouth, and this clear solution mouth is through the clear solution house steward and a plurality of clear solution branch pipe intercommunication that the level set up. The rotary mechanism comprises a rotary shaft and a plurality of cleaning assemblies, the cleaning assemblies are vertically fixed on the surface of the rotary shaft along the circumferential direction of the rotary shaft, the top end of the rotary shaft penetrates through the top of the filtering tank and is electrically connected with a driving mechanism arranged on the outer wall of the top of the filtering tank, and the driving mechanism provides power for the rotary mechanism. The utility model discloses solution in the filtration jar is in always when using and swings the state, can also scrape filter core surface filter cake simultaneously, has improved the filter effect effectively, has promoted work efficiency.

Description

Lithium carbonate solution filter equipment

Technical Field

The utility model belongs to the technical field of lithium carbonate manufacture equipment technique and specifically relates to a lithium carbonate solution filter equipment is related to.

Background

Lithium carbonate, an inorganic compound of formula Li2CO3, is a colorless monoclinic crystal or white powder, has a density of 2.11g/cm3 and a melting point 723 ℃ (1.013 x 10^5 Pa). Soluble in dilute acid, slightly soluble in water, more soluble in cold water than in hot water, and insoluble in alcohol and acetone. It can be used for preparing various lithium compounds, metallic lithium and its isotope, and also can be used for preparing catalyst for chemical reaction, semiconductor, ceramic, TV, medicine, lithium ion battery and atomic energy industry.

In the process of producing sodium carbonate, insoluble mechanical impurities, magnesium hydroxide solid impurities, harmful metal ions and the like exist in the solution, and the solution needs to be filtered. Present filter can form the filter cake on the surface of filter core after using for a long time, and the filter cake is piled up by the impurity in the residue after filtering or the solution and forms, and the thickness of filter cake can influence the filter effect after reaching certain thickness, need wash the filtration membrane of filter core surface, and pile up when the residue among the prior art and wash after too much, and its flushing effect is poor, can not be with the filtration membrane on accumulational residue clean flushing, influence the filter effect.

Disclosure of Invention

To the above situation, for overcoming prior art's defect, the utility model aims at providing a lithium carbonate solution filter equipment has solved the technical problem that the filter effect is poor, work efficiency is low among the current filter filtering process.

In order to achieve the above object, the utility model provides a following technical scheme:

a lithium carbonate solution filter device, comprising: the bottom of the filtering tank is provided with a conical part, and the bottom of the conical part is provided with a slag discharge port; the liquid inlet is arranged at the side wall of the filter tank above the conical part; the mounting plate is fixedly mounted on the upper part of the inner cavity of the filter tank, and a plurality of first round holes and second round holes positioned in the middles of the first round holes are distributed on the periphery of the upper surface of the mounting plate at intervals; the filter elements are the same as the first round holes in number, and the upper ends of the filter elements are fixedly arranged in the inner cavity of the filter tank through the first round holes; the rotating mechanism comprises a rotating shaft and a plurality of cleaning assemblies, the rotating shaft penetrates through the second round holes and is arranged in the middle of the filter elements, and the cleaning assemblies are vertically fixed on the surface of the rotating shaft along the circumferential direction of the rotating shaft; the clear liquid branch pipes are the same as the filter elements in number and are respectively communicated with the upper ends of the filter elements; the clear liquid port is arranged on one side wall of the filter tank above the mounting plate and is communicated with the clear liquid branch pipes through a clear liquid main pipe, and the clear liquid main pipe is horizontally arranged above the clear liquid branch pipes; the rotary mechanism provides power through a driving mechanism, and the driving mechanism is installed on the outer wall of the top of the filter tank. The top end of the rotating shaft penetrates through the top of the filtering tank and is connected with the output end of the driving mechanism.

The utility model discloses in the filtering process, through the rotation of rotation axis to make the solution in the filtration jar be in always and swing the state, prevent that residue or impurity are quick to pile up at the surface of filter core, avoid filter core surface membrane to be stifled dead, promoted the filter effect. When the rotary cleaning assembly rotates, the cleaning assembly can also scrape residues or impurities on the outer surface of the filter element, on one hand, the cleaning effect is favorably improved, on the other hand, the filter element is prevented from being always washed back repeatedly in the using process, namely, the back washing procedure is not carried out, the filter element can be normally filtered, the time for repeatedly washing for many times is saved, and the working efficiency is improved.

Furthermore, the filter tank further comprises a backflow port which is arranged on one side wall of the upper part of the filter tank, and the position of the backflow port is lower than the position of the installation plate. After filtering for a period of time, the liquid inlet valve of the liquid inlet of the filter tank is closed, the liquid outlet valve of the clear liquid port is closed, the backflow port valve is opened, the clear liquid in the upper cavity is utilized to back flush the filter membrane, and residues on the outer surface of the filter element are washed away. The whole process can be set according to the situation, the backwashing setting can be carried out at regular time, and the valves are automatically switched and automatically run after being set.

Furthermore, the bottom end of the rotating shaft positioned in the inner cavity of the filter tank exceeds the bottoms of the filter elements. The solution in the whole filtering tank is favorably vibrated, and the cleaning assembly on the outer surface of the rotating shaft is enabled to be matched with the length of the filter element better.

Furthermore, the rotation axis has pivot and axle sleeve, the axle sleeve cover is located in the pivot of mounting panel below, and the pivot that is located the mounting panel top is run through and is filtered a jar top and be connected with the actuating mechanism output, and is a plurality of clean the subassembly and follow axle sleeve circumference vertical fixation in axle sleeve surface.

Furthermore, the cleaning assemblies are vertically fixed on the outer surface of the shaft sleeve through fixing plates, the fixing plates are horizontally fixed on the outer surface of the shaft sleeve along the length direction of the shaft sleeve, at least two fixing plates are symmetrically arranged along the central axis of the shaft sleeve, and the cleaning assemblies are vertically fixed on the upper surface of the fixing plates at intervals.

When the driving mechanism drives the rotating shaft to rotate, the shaft sleeve sleeved on the rotating shaft rotates along with the rotating shaft, so that the solution in the filtering tank is always in a swinging state, the filtering effect is improved, the outer surface of the filter element is prevented from being blocked, and the filtering can be carried out when the filter element is not subjected to back washing.

Further, the sweeping assembly comprises: the shell is of a hollow structure and is fixed on the outer wall of the rotating shaft; one end of the cleaning head is positioned in the shell, is attached to the inner wall of the shell and can slide along the inner wall of the shell; the other end of the cleaning head is a brush head, and the top end of the brush head is attached to the outer wall of the filter element facing the rotating shaft. When the rotation axis pivoted, the cleaning head contact filter core outside, but one then can prevent that the filter core is blockked up by impurity, and two then can scrape accumulational residue and impurity on the filter core surface down, improved the filter effect, and make the device not carry out the recoil procedure and also can normally filter, promoted work efficiency.

Furthermore, the cleaning assembly also comprises a spring arranged in the shell, one end of the spring is fixed at the bottom of the shell, and the other end of the spring is connected with the bottom of the cleaning head in the shell. Through the spring, the cleaning head can be pressed on the outer surface of the filter element at the corner in the shell through the elastic force of the spring, namely the uneven filter element can be dealt with through the spring.

Furthermore, the brush head of the cleaning head is made of rubber. Is favorable for protecting the outer wall of the filter element from being damaged in the cleaning process.

Further, the lower part of the filtering tank is vertically provided with a plurality of supporting legs, and the supporting legs are fixed on the outer side wall of the filtering tank above the conical part at intervals.

Compared with the prior art, the beneficial effects of the utility model are that:

in the prior art, when residues or impurities are accumulated too much, the residues or the impurities are washed, the washing effect is poor, and the residues accumulated on the filtering membrane cannot be washed clean, so that the filtering effect is influenced. Meanwhile, in the working process of the filtering device, the filtering membrane on the outer surface of the filter element is always washed repeatedly, so that time is consumed, and the working efficiency of filtering is influenced. The utility model discloses in the filtering process, through the rotation of rotation axis to make the solution in the filtration jar be in always and swing the state, prevent that residue or impurity are quick to pile up at the surface of filter core, avoid filter core surface membrane to be stifled dead, promoted the filter effect. When the rotary cleaning assembly rotates, the cleaning assembly can scrape residues on the outer surface of the filter element, on one hand, the cleaning effect is improved, on the other hand, the filter element is prevented from being always washed repeatedly in the using process, namely, the filter element can be normally filtered without a back washing procedure, the time for repeatedly washing for many times is saved, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the front view structure of the present invention.

Fig. 3 is a schematic structural diagram of the middle mounting plate of the present invention.

Fig. 4 is a schematic structural diagram of the rotating mechanism of the present invention.

Fig. 5 is a schematic structural view of the middle sweeping assembly of the present invention.

Reference numerals: 1. a filter tank; 10. a tapered portion; 11. a support leg; 2. a liquid inlet; 20. a material pump; 3. mounting a plate; 30. a first circular hole; 31. a second circular hole; 4. a filter element; 5. a rotation mechanism; 501. a rotating shaft; 502. a shaft sleeve; 51. a sweeping assembly; 510. a housing; 511. cleaning the head; 512. a spring; 52. a drive mechanism; 53. a fixing plate; 6. clear liquid branch pipes; 7. a clear liquid header pipe; 8. a clear liquid port; 9. a return port.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the claimed embodiments. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present application, it is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "circumferential," "end," "side," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the claimed embodiments of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

In the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the embodiments of the present application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of the embodiments of the present application, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present application. Moreover, the claimed embodiments may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of brevity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1-5, the utility model provides a lithium carbonate solution filter equipment, including filtering jar 1, inlet 2, mounting panel 3, filter core 4, rotary mechanism 5, clear solution branch pipe 6, clear solution house steward 7, clear solution mouth 8, backward flow mouth 9.

Inlet 2 is installed in filtering 1 lower part lateral wall departments of jar, mounting panel 3 is fixed to be set up in filtering 1 inner chamber upper portion of jar, filter core 4 adopts a plurality ofly, set up respectively in filtering 1 inner chamber of jar through mounting panel 3, be arranged in the lithium carbonate solution in the inner chamber to filter, rotary mechanism 5 sets up in the centre of a plurality of filter cores 4 through mounting panel 3, 6 one end of clear solution branch pipe and 4 upper ends of filter core intercommunication, the other end and clear solution house steward 7 intercommunication, and communicate to clear solution mouth 8, clear solution branch pipe 6 is the same with 4 quantity of filter core. Lithium carbonate solution enters an inner cavity of the filter tank 1 from the liquid inlet 2 and is filtered by the filter element 4, the rotating mechanism 5 rotates in the inner cavity of the filter tank 1 during filtering, and filtered clear liquid flows to the clear liquid main pipe 7 through the clear liquid branch pipes 6 and is discharged from the clear liquid port 8 after being gathered.

The bottom of the filter tank 1 is provided with a conical part 10, the bottom of the conical part 10 is provided with a slag discharge port, and when the residue of the conical part 10 at the bottom of the filter tank 1 reaches a certain amount, a slag discharge valve of the slag discharge port can be automatically opened to discharge the residue or an external residual liquid discharge pipe is connected to discharge the residue. Filter jar 1 and be fixed in ground through a plurality of landing legs 11, preferably four landing legs 11, the vertical upwards setting of landing leg 11, the upper end respectively with filter jar 1 lateral wall be connected fixedly, specifically, landing leg 11 interval is fixed in on the filter jar 1 lateral wall all around of toper portion 10 top, this hookup location is a little above the toper portion 10.

Liquid inlet 2 is installed on the filtration jar 1 lateral wall of toper portion 10 top, and this liquid inlet 2 is carried the lithium sulfate solution through a material pump 20 and is filtered jar 1 in, and is concrete, and the input of material pump 20 is connected with the material jar that contains the lithium sulfate solution with the pipeline, and the output communicates with the inner chamber that filters jar 1 with the pipeline.

Mounting panel 3, fixed mounting has a plurality of first round holes 30 in 1 inner chamber upper portion of filter tank, the distribution all around of 3 upper surfaces of mounting panel, in this embodiment, first round hole 30 is eight, arranges into a positive direction frame or rectangle frame respectively the interval. A second circular hole 31 is further disposed between the first circular holes 30, and a certain distance is reserved between the circular holes.

The filter elements 4 are the same as the first round holes 30 in number, namely eight groups are adopted and are respectively matched with the eight first round holes 30, and the upper ends of the eight filter elements 4 respectively penetrate through the eight first round holes 30 and are fixedly arranged in the inner cavity of the filter tank 1. A certain gap is reserved between the fixed filter element 4 and the filter element 4. The filter element 4 is cylindrical, lithium carbonate solution flows inwards from the outside of the filter element 4 after entering the inner cavity of the filter tank 1 from the liquid inlet 2, the filter element 4 filters the lithium carbonate solution, clear liquid is formed after filtration and then enters the clear liquid branch pipe 6, and residues in the liquid are intercepted on the surface of the filter element 4 by the filter element 4. The utility model discloses when using, accessible mounting panel 3 will filter the solution in jar 1 and keep apart to mounting panel 3 below, and mounting panel 3 is sealed to be set up promptly, between each filter core 4 and each first round hole 30, sealed setting between rotary mechanism 5 and the second round hole 31, if sealed flange seal fixed setting.

The rotating mechanism 5 is fixed in the middle of the filter elements 4, and the rotating mechanism 5 comprises a rotating shaft, a cleaning assembly 51 and a driving mechanism 52. The rotating shaft penetrates through the second round holes 31 and is arranged among the filter elements 4, and the height of the bottom end of the rotating shaft is greater than that of the bottoms of the filter elements 4, namely the length of the rotating shaft is greater than that of the filter elements 4; the top end of the rotating shaft penetrates through the top of the filtering tank 1 and is connected with the output end of a driving mechanism 52 fixed on the outer wall of the top of the filtering tank 1, the rotating shaft penetrates through the second round hole 31 and can be provided with a sealing flange, and the cleaning assembly 51 adopts a plurality of groups and is vertically arranged on the outer side wall of the rotating shaft along the circumferential direction of the rotating shaft respectively. In the rotating process of the rotating shaft, the cleaning assembly 51 can contact with the outer walls of the filter elements 4 facing the rotating shaft direction, and cleans residues on the outer walls of the filter elements 4, so that the filter elements 4 are prevented from being completely blocked by the residues. The driving mechanism 52 may be any one of the conventional driving mechanisms, such as a hydraulic driving mechanism, a pneumatic driving mechanism, and an electric appliance east-oriented driving mechanism.

Specifically, the rotating shaft is provided with a rotating shaft 501 and a shaft sleeve 502, the shaft sleeve 502 is sleeved on the rotating shaft 501 below the mounting plate 3, the rotating shaft 501 above the mounting plate 3 penetrates through the top of the filter tank 1 to be connected with the output end of the driving mechanism 52, and a sealing flange can be arranged at the top of the filter tank 1 to further prevent the solution from flowing to the outer wall. A certain gap is reserved between the shaft sleeve 502 and the filter elements 4. The plurality of sweeping assemblies 51 can be directly fixed on the outer wall of the shaft sleeve 502 at intervals vertically along the circumferential direction of the shaft sleeve 502. The cleaning assembly can also be fixed on the outer surface of the shaft sleeve 502 by the fixing plate 53, that is, the bottom surface of the fixing plate 53 is horizontally fixed on the upper surface of the shaft sleeve 502 along the shaft sleeve 502, and the bottoms of the cleaning assemblies 51 are vertically fixed on the upper surface of the fixing plate 53. The fixed plates 53 are at least two and are respectively symmetrically arranged on the outer surface of the shaft sleeve 502 along the central axis of the shaft sleeve 502, or three or four fixed plates 53 can be arranged and respectively fixed on the outer surface of the shaft sleeve 502, and a plurality of groups of cleaning assemblies 51 are fixedly arranged on the upper surface of each fixed plate 53 at intervals. The length of the fixing plate 53 is equal to or slightly greater than that of the filter element 4 and is less than that of the shaft sleeve 502.

The cleaning assembly 51 includes a housing 510, a cleaning head 511, and a spring 512.

The housing 510 is a hollow structure, and the bottom thereof is vertically fixed to the outer wall of the shaft housing 502 of the rotation shaft along the circumferential position of the rotation shaft, that is, vertically fixed to the upper surface of the fixing plate 53. The bottom end of the cleaning head 511 penetrates through one end of the shell 510 far away from the fixing plate 53 and is arranged in the shell 510, the outer wall of the bottom end is attached to the inside of the shell 510 and slides along the inner wall of the shell 510, the top end of the cleaning head 511 is positioned outside the shell 510, the top end of the cleaning head 511 is a brush head, the top end of the brush head is close to the outer wall of the filter element 4 facing the rotating shaft, and the brush head is attached to the outer wall and brushes the outer surface of the outer wall when rotating. The spring 512 is arranged in the shell 510, one end of the spring is fixed at the bottom of the shell 510, and the other end of the spring is connected with the bottom of the cleaning head 511 positioned in the shell 510; the spring 512 can also be directly sleeved on the cleaning head 511 located in the housing 510. When in use, the cleaning head 511 can be pressed against the outer surface of the filter element at the corner in the shell 510 through the elastic force of the spring 512 through the spring 512, namely, the uneven filter element 4 can be dealt with through the spring 512. The brush head at the top end of the cleaning head 511 is made of rubber. The outer wall of the filter element 4 is protected from being damaged in the cleaning process. The cleaning heads 511 can brush the outer surfaces of the filter elements 4 facing the rotating shaft. The cleaning head 511 can slide along the inner wall of the housing 510, but will not be separated from the housing 510.

The clear liquid branch pipe 6 is communicated with the upper ends of the filter elements 4, the number of the clear liquid branch pipe 6 is the same as that of the filter elements 4, namely, eight clear liquid branch pipes 6 are adopted in the embodiment, and the eight clear liquid branch pipes 6 are respectively and vertically communicated with the upper ends of the eight filter elements 4. The other ends of the eight clear liquid branch pipes 6 are respectively communicated with a clear liquid header pipe 7 and flow to a clear liquid port 8 through the clear liquid header pipe 7, the clear liquid header pipe 7 is horizontally arranged above the clear liquid branch pipes 6 and is communicated with the clear liquid branch pipes, and clear liquids flowing out of the eight clear liquid branch pipes 6 are collected and then flow to the clear liquid port 8.

The backflow port 9 is arranged at the upper part of the filtering tank 1, is lower than the mounting position of the mounting plate 3, and is used for backwashing the filter element 4 in the inner cavity of the filtering tank 1 and washing away residues on the outer surface of the filter element 4.

The working principle is as follows: the material pump 20 conveys the lithium carbonate solution into the inner cavity of the filter tank 1, the lithium carbonate solution flows inwards from the outer surfaces of the filter elements 4, and the filter elements 4 filter impurities or residues in the solution and intercept the impurities or residues on the outer surfaces of the filter elements 4. The solution is filtered by a plurality of filter elements 4 to form clear liquid, enters the corresponding clear liquid branch pipe 6, and then flows to a clear liquid port 8 from a clear liquid header pipe 7 to be discharged. Meanwhile, the driving mechanism 52 is started, the rotating shaft rotates in the middle of the plurality of filter elements 4, namely, in the middle of the inner cavity of the filter tank 1, and the solution in the filter tank 1 is always in a vibrating state in the rotating process, so that impurities or residues are prevented from being accumulated on the outer surface of the filter elements 4, and the cleaning head 511 of the cleaning assembly 51 on the outer surface of the rotating shaft cleans the outer surfaces of the plurality of filter elements 4 facing the rotating shaft, namely, the impurities or the residues on the outer surfaces of the plurality of filter elements 4 are scraped. After the filter element 4 is used for a period of time, the filter element 4 can be backwashed through the backflow port 9, namely, the liquid outlet valve of the clear liquid port 8 is closed, the backflow port 9 valve is opened, the filter element 4 is backwashed by utilizing the clear liquid in the upper cavity, and impurities or residues on the outer surface of the filter element 4 are washed away.

Claims (9)

1. A lithium carbonate solution filter device, comprising:

the bottom of the filter tank (1) is provided with a conical part (10), and the bottom of the conical part (10) is provided with a slag discharge port;

the liquid inlet (2) is arranged at the side wall of the filter tank (1) above the conical part (10);

the mounting plate (3) is fixedly mounted on the upper part of the inner cavity of the filter tank (1), and a plurality of first round holes (30) and second round holes (31) positioned in the middles of the first round holes (30) are distributed on the periphery of the upper surface at intervals;

the filter element (4) is provided with a plurality of groups with the same number as the first round holes (30), and the upper end of the filter element is fixedly arranged in the inner cavity of the filter tank (1) through the first round holes (30);

the rotating mechanism (5) comprises a rotating shaft and a plurality of cleaning assemblies (51), the rotating shaft penetrates through the second round holes (31) and is arranged in the middles of the filter elements (4), and the cleaning assemblies (51) are vertically fixed on the surface of the rotating shaft along the circumferential direction of the rotating shaft;

the clear liquid branch pipes (6) are the same as the filter elements (4) in number and are respectively communicated with the upper ends of the filter elements (4);

the clear liquid port (8) is arranged on the side wall of the filter tank (1) above the mounting plate (3) and is communicated with the clear liquid branch pipes (6) through a clear liquid header pipe (7), and the clear liquid header pipe (7) is horizontally arranged above the clear liquid branch pipes (6);

wherein, the rotating mechanism (5) is powered by a driving mechanism (52), and the driving mechanism (52) is arranged on the outer wall of the top of the filter tank (1).

2. The lithium carbonate solution filtering device according to claim 1, further comprising a return port (9) provided in a side wall of an upper portion of the filter tank (1), wherein the position of the return port (9) is lower than the position where the mounting plate (3) is mounted.

3. The lithium carbonate solution filtering device according to claim 1, wherein the bottom end of the rotating shaft located in the inner cavity of the filter tank (1) exceeds the bottom of the filter element (4).

4. The lithium carbonate solution filtering device according to claim 1, wherein the rotating shaft is provided with a rotating shaft (501) and a shaft sleeve (502), the shaft sleeve (502) is sleeved on the rotating shaft (501) below the mounting plate (3), the rotating shaft (501) above the mounting plate (3) penetrates through the top of the filter tank (1) to be connected with the output end of the driving mechanism (52), and a plurality of the cleaning assemblies (51) are vertically fixed on the outer surface of the shaft sleeve (502) along the circumferential direction of the shaft sleeve (502).

5. The lithium carbonate solution filtering device according to claim 4, wherein a plurality of the cleaning assemblies (51) are vertically fixed on the outer surface of the shaft sleeve (502) through fixing plates (53), the fixing plates (53) are horizontally fixed on the outer surface of the shaft sleeve (502) along the length direction of the shaft sleeve (502), the fixing plates (53) are at least two and are symmetrically arranged along the central axis of the shaft sleeve (502), and a plurality of the cleaning assemblies (51) are vertically fixed on the upper surface of the fixing plates (53) at intervals.

6. The lithium carbonate solution filtering device according to claim 1, 4 or 5, characterized in that the sweeping assembly (51) comprises:

a housing (510) having a hollow structure and fixed to an outer wall of the rotating shaft;

one end of the cleaning head (511) is positioned in the shell (510), is attached to the inner wall of the shell (510), and can slide along the inner wall of the shell;

the other end of the cleaning head (511) is a brush head, and the top end of the brush head is attached to the outer wall of the filter element (4) facing the rotating shaft.

7. The lithium carbonate solution filtering device according to claim 6, wherein the cleaning assembly (51) further comprises a spring (512) disposed inside the housing (510), one end of the spring is fixed at the bottom of the housing (510), and the other end of the spring is connected with the bottom of the cleaning head (511) located inside the housing (510).

8. The lithium carbonate solution filtering device according to claim 7, wherein the brush head of the cleaning head (511) is made of rubber.

9. The lithium carbonate solution filtering device according to claim 1, wherein a plurality of support legs (11) are vertically arranged at the lower part of the filtering tank (1), and the support legs (11) are fixed on the outer side wall of the filtering tank (1) above the conical part (10) at intervals.

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