A filtering device for lithium carbonate production

Abstract

The present invention relates to the technical field of vacuum drum filters, and in particular to a filtering device for lithium carbonate production, which comprises a drum body; a cavity one and a cavity two are provided on the drum body, and a support plate, a partition plate, and a vertical plate are arranged in sequence on the drum body, and the partition plate divides the interior of cavity one into a negative pressure cavity on the left and a positive pressure cavity on the right; a plurality of negative pressure pipes are provided on the inner wall of the negative pressure cavity, a negative pressure pipeline and an air blowing pipeline connected to the negative pressure cavity are provided on the support plate, a sealing plate and an overflow plate are provided between the support plate and the partition plate, and the sealing plate connects the air blowing pipeline with one of the negative pressure pipelines, a feed pipe is provided on the partition plate, and a linear output member and a feed plate one and a feed plate two connected to the output end are provided on the support plate; a plurality of positive pressure pipelines are provided on the inner wall of the positive pressure cavity, and a positive pressure pipeline is rotatably connected to the inner wall of cavity two. The present invention can clean the solid sediment inside the drum body without stopping the machine, thereby improving the filtering effect of the device.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum drum filters, in particular to a filtering device for lithium carbonate production. Background Art

[0002] A key step in the production of lithium carbonate is evaporation and lithium precipitation, the main purpose of which is to extract lithium from spodumene concentrate. After evaporation and aging, a large amount of lithium carbonate precipitation is formed in the solution, and the precipitation needs to be separated from the mother liquor. The rotary drum vacuum filter is a commonly used solid-liquid separation equipment.

[0003] When the rotary drum vacuum filter is working, the lithium-containing solution is introduced into the rotating drum filter, and the drum surface is covered with a filter medium (such as filter cloth). As the drum rotates, the solution passes through the filter medium under the action of vacuum, and the solid lithium carbonate precipitate is retained on the filter cloth. As the drum rotates, the filter cake reaches the unloading area, and the filter cake is unloaded from the filter cloth by compressed air or a scraper. Through the above process, the lithium carbonate precipitate is effectively separated from the solution, and after subsequent drying, crushing and other processes, the lithium carbonate product is finally obtained. Referring to the Chinese patent document with the authorization announcement number CN220715069U and the announcement date of April 5, 2024, the name is a filter cloth installation device for a vacuum rotary drum filter, including a filter drum body, a plurality of skeleton plates and a plurality of filter cloth bodies, and the filter cloth bodies are installed in sequence.

[0004] However, in some cases, such as when the filter cloth is damaged, improper operation or the filter cake is too thick, penetration may occur, that is, solid precipitation may penetrate the filter cloth and enter the inside of the rotary drum vacuum filter. In addition, solid lithium carbonate precipitation may also occur in the vacuum filter. This will lead to waste of lithium carbonate precipitation, affect the use of the rotary drum vacuum filter, reduce the filtration speed, affect product quality, and accelerate equipment wear. The commonly used method at present is to stop the machine to clean the inside of the rotary drum vacuum filter, which affects processing and production. Summary of the invention

[0005] In view of this, the present invention provides a filtering device for lithium carbonate production, aiming to solve the technical problem that some solid precipitates may exist inside the drum body in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a filtering device for lithium carbonate production, which adopts the following technical solution: a filtering device for lithium carbonate production, comprising a drum body rotatably arranged on a frame, a plurality of skeleton plates, a plurality of filter cloths and a raw material pool;

[0007] The drum body is provided with a connected cavity 1 and cavity 2 in the axial direction, and a support plate fixedly connected to the left side of the frame, a partition plate fixedly connected to the support plate through a plurality of connecting rods, and a vertical plate fixedly connected to the partition plate through a connecting plate are arranged in sequence in the axial direction of the drum body, the support plate is rotatably connected to the left side wall of the drum body, the connecting plate is fitted with the inner wall of cavity 1 and the connecting plate is open downward, the partition plate and the vertical plate are both rotatably connected to the inner wall of cavity 1, and the partition plate divides the interior of cavity 1 into a negative pressure chamber on the left and a positive pressure chamber on the right;

[0008] The inner wall of the negative pressure chamber is provided with a plurality of negative pressure pipes corresponding to the filter cloths one by one, the support plate is provided with a negative pressure pipeline and an air blowing pipeline connected to the negative pressure chamber, a sealing plate and an arc-shaped overflow plate are provided between the support plate and the partition plate, the sealing plate enables the air blowing pipeline to be connected to one of the negative pressure pipelines, the overflow plate divides the negative pressure chamber into two connected upper and lower parts, a feed pipe connecting the negative pressure chamber and the positive pressure chamber is provided on the partition plate, a linear output part and a feed plate 1 and a feed plate 2 connected to the output end are provided on the support plate, the feed plate 1 and the feed plate 2 both reciprocate along the axial direction of the drum body and are slidably plugged into the inner wall of the feed pipe;

[0009] The inner wall of the positive pressure cavity is provided with a plurality of positive pressure pipes corresponding to the frame plates one by one, the second inner wall of the cavity is rotatably connected with a positive pressure pipeline connected to the positive pressure cavity, and the frame plates are provided with a plurality of through holes.

[0010] By adopting the above technical scheme, the cavity is divided into a negative pressure cavity and a positive pressure cavity. The negative pressure cavity, the negative pressure pipe and the negative pressure pipeline cooperate to realize negative pressure absorption, so that the liquid in the raw material pool is filtered through the filter cloth into the negative pressure cavity and is sucked away, and the solid in the raw material pool is adsorbed on the outer surface of the filter cloth by the negative pressure for collection and treatment. The air blowing pipeline and the sealing plate blow air into the negative pressure pipe, so that when the filter cloth moves to the specified position, the solid on the outer surface of the filter cloth is blown up, which is helpful for material discharge.

[0011] The negative pressure pipe located in the upper part of the drum body, the solid sediment inside it moves downward along the negative pressure pipe under the action of gravity and falls into the negative pressure chamber, and then settles on the overflow plate. The unloading plate 1 and the unloading plate 2 cooperate, and the unloading plate 2 plays the role of sealing the unloading pipe. The unloading plate 1 moves back and forth and pushes the sediment on the overflow plate into the positive pressure chamber. The positive pressure pipeline pressurizes and blows air into the positive pressure chamber. Under the action of the airflow in the positive pressure chamber, it is sprayed along the positive pressure pipe at the bottom of the drum body to the bottom of the raw material pool, thereby achieving the purpose of cleaning the solid sediment in the drum body.

[0012] Among them, the connecting plate is in contact with an inner wall of the cavity and its opening faces downward, that is, the connecting plate limits the flow direction of gas in the positive pressure chamber, so that the gas is blown out along the positive pressure pipe below, that is, the material in the positive pressure chamber is only discharged from the positive pressure pipe below, so as to prevent the material from being blown around and polluting the environment; the overflow plate can play a blocking role to prevent solid sediment falling from the upper negative pressure pipe from falling directly into the lower negative pressure pipe, which is conducive to the overflow plate collecting solid sediment, making the device process smooth and reducing the risk of mutual obstruction between structures.

[0013] At the same time, the positive pressure pipe blows air and materials into the raw material pool, which can play a turbulent role, disrupting the aggregation of solid sediments in the raw material pool, which is conducive to the solid sediments being adsorbed on the outer surface of the filter cloth.

[0014] Optionally, the sealing plate is a triangular plate with an opening at one end, and the opening is inclined upward.

[0015] By adopting the above technical scheme, the inner wall of the sealing plate, the support plate, the partition plate and the inner wall of the negative pressure chamber cooperate to form a sealed chamber, and the air blowing pipeline is connected to the sealed chamber. As the drum body rotates, the environment inside the negative pressure pipeline connected to the sealed chamber changes, and the air blowing pipeline blows air into the negative pressure pipeline connected thereto, thereby promoting the discharge of solid sediment adsorbed on the filter cloth.

[0016] Optionally, one end of the overflow plate abuts against the inner wall of the negative pressure chamber, and an overflow port is left between the other end of the overflow plate and the sealing plate.

[0017] Optionally, the blanking plate is connected to the bottom point of the upper surface of the overflow plate.

[0018] By adopting the above technical solution, the sediment falling above the overflow plate settles down onto the overflow plate and moves downward along the curvature of the overflow plate to the bottom point on the upper surface of the overflow plate, which is conducive to collection and treatment.

[0019] Optionally, a receiving groove is opened on the right side of the support plate, the diameter of the receiving groove is larger than the diameter of the blanking plate 1, and the blanking plate 1 is slidably inserted into the bottom wall of the receiving groove.

[0020] By adopting the above technical solution, since the device works continuously, when the unloading plate pushes the unloading, the sediment continues to descend and falls between the unloading plate and the support plate, and a receiving groove is provided. When the unloading plate is reset, the liquid and solid sediment between the unloading plate and the support plate are squeezed and pushed, so that the material can flow out of the gap between the circumferential side wall of the unloading plate and the side wall of the receiving groove, thereby avoiding the solid sediment from being squeezed in the gap as much as possible.

[0021] Optionally, a filter is provided at the end of the negative pressure pipeline.

[0022] By adopting the above technical solution, the stability of the device is improved and the risk of solid sediment flowing out of the negative pressure pipeline along with the liquid is reduced.

[0023] Optionally, the negative pressure pipe is composed of a pipe 1 which is opened on the inner wall of the negative pressure chamber and extends radially along the drum body, and a pipe 2 which extends axially along the drum body, and the pipe 2 matches the filter cloth.

[0024] Optionally, the positive pressure pipeline is composed of a pipeline three opened on the inner wall of the positive pressure chamber and extending radially along the drum body, and a pipeline four extending along the axis of the drum body, and the pipeline four matches the skeleton plate.

[0025] In summary, the present invention includes the following beneficial technical effects:

[0026] 1. The negative pressure pipe is located in the upper part of the drum body. The solid sediment inside it moves downward along the negative pressure pipe under the action of gravity and falls into the negative pressure chamber, and then settles on the overflow plate. The unloading plate 1 and the unloading plate 2 cooperate with each other. The unloading plate 2 plays the role of sealing the unloading pipe. The unloading plate 1 moves back and forth and pushes the sediment on the overflow plate into the positive pressure chamber. The positive pressure pipeline pressurizes and blows air into the positive pressure chamber. Under the action of the airflow in the positive pressure chamber, it is sprayed to the bottom of the raw material pool along the positive pressure pipe at the bottom of the drum body, so as to achieve the purpose of cleaning the solid sediment in the drum body; at the same time, the positive pressure pipe blows air and materials into the raw material pool, which can play a turbulent role, disrupt the aggregation of solid sediment in the raw material pool, and is conducive to the solid sediment being adsorbed on the outer surface of the filter cloth.

[0027] 2. The connecting plate limits the flow direction of gas in the positive pressure chamber, so that the gas is blown out along the positive pressure pipe below. That is, the material in the positive pressure chamber is only discharged from the positive pressure pipe below to prevent the material from being blown around and polluting the environment.

[0028] 3. The overflow plate can play a blocking role, preventing the solid sediment falling from the upper negative pressure pipe from falling directly into the lower negative pressure pipe, which is conducive to the overflow plate collecting solid sediment, making the device process smooth and reducing the risk of mutual obstruction between structures; the sediment falling above the overflow plate settles down onto the overflow plate and moves downward along the curvature of the overflow plate to the bottom point of the upper surface of the overflow plate, which is conducive to collection and treatment.

[0029] 4. When the lower plate is reset, the liquid and solid sediment between the lower plate and the support plate are squeezed and pushed, so that the material can flow out of the gap between the side wall of the lower plate and the side wall of the containing tank along the circumference, avoiding the solid sediment from being squeezed in the gap as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0031] Figure 2 It is a cross-sectional schematic diagram of the drum body in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the structure of a partition component in an embodiment of the present invention;

[0033] Figure 4 It is a cross-sectional schematic diagram of the drum body and the partition assembly in an embodiment of the present invention;

[0034] Figure 5 for Figure 4 A partial enlarged schematic diagram of part A;

[0035] Figure 6 It is a schematic diagram of the structure of the negative pressure chamber in an embodiment of the present invention;

[0036] Figure 7 for Figure 6 A partial enlarged schematic diagram of part B;

[0037] Figure 8 Schematic diagram of the structure of the positive pressure chamber in an embodiment of the present invention.

[0038] Explanation of the reference numerals: 1. filter body; 11. frame; 12. drum body; 13. skeleton plate; 14. filter cloth; 15. raw material pool; 16. scraper plate; 17. unloading conveyor belt; 2. partition assembly; 21. cavity one; 211. negative pressure cavity; 212. positive pressure cavity; 22. cavity two; 23. support plate; 24. connecting rod; 25. partition plate; 26. connecting plate; 27. vertical plate; 3. negative pressure extraction assembly; 31. negative pressure pipeline; 32. negative pressure pipeline; 33. air blowing pipeline; 34. sealing plate; 4. positive pressure cleaning assembly; 41. overflow plate; 42. unloading pipe; 43. linear output member; 44. unloading plate one; 45. unloading plate two; 46. positive pressure pipeline; 47. positive pressure pipeline; 48. through hole; 49. receiving tank. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0040] The following is combined with Figure 1 -Attached Figure 8 The present invention is described in further detail.

[0041] The embodiment of the present invention discloses a filtering device for lithium carbonate production. Figures 1 to 8A filtering device for lithium carbonate production includes a filter body 1, a partition component 2, a negative pressure extraction component 3 and a positive pressure cleaning component 4. The partition component 2 is arranged at the drum body 12 on the filter body 1, so that different areas of the drum body 12 have different functions. The partition component 2 cooperates with the negative pressure extraction component 3 and the positive pressure cleaning component 4, so that the filter body 1 can not only perform negative pressure extraction and filtration on the solution and collect solid precipitates, but also clean the solid precipitates inside the drum body 12, and at the same time, the purpose of improving the negative pressure extraction effect can be achieved.

[0042] Reference Figure 1 The filter body 1 includes a frame 11, a drum body 12, a plurality of skeleton plates 13, a plurality of filter cloths 14, a raw material pool 15, a scraper plate 16 and a material discharge conveyor belt 17.

[0043] The frame 11 is vertically arranged on a horizontal plane, the drum body 12 is axially horizontal, the drum body 12 is rotatably arranged on the frame 11, and a belt transmission member is arranged on the frame 11. The belt transmission drives the drum body 12 to rotate the drum body 12 around its own axis. A plurality of skeleton plates 13 are evenly arranged along the circumference of the drum body 12, the skeleton plates 13 extend radially along the drum body 12, the plurality of skeleton plates 13 are connected to the circumferential side walls of the drum body 12, and a plurality of filter cloths 14 are sequentially arranged between two adjacent skeleton plates 13. The raw material pool 15 is fixedly connected to the frame 11, the raw material pool 15 is located below the drum body 12, a feeding port is provided at the bottom of the raw material pool 15, and an overflow hole is provided on the side of the raw material pool 15.

[0044] The material enters the internal cavity of the raw material pool 15 through the feeding port. Under the action of negative pressure, the liquid enters the inside of the drum body 12, and the solid precipitate is adsorbed on the filter cloth 14 by the negative pressure. The scraper plate 16 and the unloading conveyor belt 17 are both connected to the frame 11. The scraper plate 16 is inclined. The solid precipitate rotating to the scraper plate 16 is scraped off by the scraper plate 16 and slides along the scraper plate 16 to the unloading conveyor belt 17 for transportation and collection to complete the filtration.

[0045] Reference Figure 2 , Figure 3 and Figure 4 The partition assembly 2 includes a cavity 1 21 , a cavity 22 , a support plate 23 , a connecting rod 24 , a partition plate 25 , a connecting plate 26 and a vertical plate 27 .

[0046] Reference Figure 2 The cavity 1 21 and the cavity 2 22 are opened inside the drum body 12, the cavity 1 21 and the cavity 2 22 are connected and penetrate the drum body 12 in the axial direction of the drum body 12, and the cavity 1 21 and the cavity 2 22 are both located in the axial direction of the drum body 12 to ensure the normal rotation of the drum body 12. Figure 3 and Figure 4, the support plate 23, the connecting rod 24, the partition plate 25, the connecting plate 26 and the vertical plate 27 are arranged in sequence from left to right, the support plate 23 is fixedly connected to the left side of the frame 11 and is rotatably connected to the left side wall of the drum body 12, the support plate 23 closes the end of the cavity 21, a plurality of connecting rods 24 are provided, the connecting rods 24 are evenly arranged along the circumference of the drum body 12, the connecting rods 24 are arranged between the support plate 23 and the partition plate 25 and the two are fixedly connected, the partition plate 25 is vertically arranged inside the cavity 21 and is rotatably connected to the inner wall of the cavity 21, refer to Figure 5 The partition plate 25 divides the interior of the cavity 21 into a negative pressure chamber 211 on the left and a positive pressure chamber 212 on the right. The connecting plate 26 is arc-shaped as a whole. The connecting plate 26 fits the side wall of the positive pressure chamber 212. The opening of the connecting plate 26 faces downward. The connecting plate 26 is arranged between the partition plate 25 and the vertical plate 27 and the two are fixedly connected. The vertical plate 27 is vertically arranged on the right side of the cavity 21 and is rotatably connected to the inner wall of the cavity 21. The vertical plate 27 is used to enhance the stability of the device, which is beneficial to the stability of the structure.

[0047] Reference Figure 4 , Figure 6 and Figure 7 The negative pressure extraction component 3 includes multiple negative pressure pipes 31, a negative pressure pipeline 32, an air blowing pipeline 33 and a sealing plate 34.

[0048] Reference Figure 4 and Figure 6 , multiple negative pressure pipes 31 are evenly arranged along the circumference of the drum body 12, and the multiple negative pressure pipes 31 correspond to the multiple filter cloths 14 one by one. The negative pressure pipe 31 is composed of a pipe 1 opened on the inner wall of the negative pressure chamber 211 and extending along the radial direction of the drum body 12 and a pipe 2 extending along the axial direction of the drum body 12. The pipe 2 matches the filter cloth 14. The negative pressure pipe 31 is in a negative pressure state, the material in the raw material pool 15 is adsorbed, and the liquid passes through the filter cloth 14 into the negative pressure pipe 31 and is pumped into the negative pressure chamber 211. The negative pressure pipeline 32 is arranged on the support plate 23 and communicated with the inside of the negative pressure chamber 211, so as to keep the inside of the negative pressure chamber 211 and the multiple negative pressure pipes 31 in a stable negative pressure state to ensure the filtering effect of the device.

[0049] Reference Figure 4 , Figure 6 and Figure 7The blowing pipeline 33 is arranged on the support plate 23 and is connected to the inside of the negative pressure chamber 211. The sealing plate 34 is arranged between the support plate 23 and the partition plate 25. The sealing plate 34 is a triangular plate with an opening at one end. The opening of the sealing plate 34 is inclined upward and toward the top of the scraper plate 16. The inner wall of the sealing plate 34, the support plate 23, the partition plate 25 and the inner wall of the negative pressure chamber 211 cooperate to form a sealed chamber. The sealed chamber is connected to the end of the blowing pipeline 33. As the drum body 12 rotates, the environment in the negative pressure pipe 31 connected to the sealed chamber changes, and the blowing pipeline 33 blows air into the negative pressure pipe 31 connected thereto, thereby promoting the discharge of solid sediment adsorbed on the filter cloth 14.

[0050] Reference Figures 2 to 5 The positive pressure cleaning assembly 4 includes an overflow plate 41, a feed pipe 42, a linear output member 43, a feed plate 1 44, a feed plate 2 45, a plurality of positive pressure pipes 46, a positive pressure pipeline 47, a through hole 48 and a receiving groove 49.

[0051] Reference Figure 7 The overflow plate 41 is arranged between the support plate 23 and the partition plate 25. The overflow plate 41 is arc-shaped and protrudes downward. The overflow plate 41 is arranged in the lower half of the negative pressure chamber 211. The overflow plate 41 divides the negative pressure chamber 211 into two connected upper and lower parts. The higher end of the overflow plate 41 abuts against the inner wall of the negative pressure chamber 211, and an overflow port is left between the lower end of the overflow plate 41 and the sealing plate 34. The overflow port allows the liquid in the negative pressure pipe 31 in the lower half of the drum to pass through and be drawn away by the negative pressure pipeline 32.

[0052] Reference Figure 7 The solid sediment inside the negative pressure pipe 31 located in the upper part of the drum will move downward along the negative pressure pipe 31 into the negative pressure chamber 211 under the action of gravity and negative pressure. The overflow plate 41 acts as a barrier to prevent the solid sediment from moving into the negative pressure pipe 31 below as much as possible. The solid sediment is deposited on the overflow plate 41 and moves downward along the curvature of the overflow plate 41 to the bottom point of the upper surface of the overflow plate 41, which is conducive to collecting the solid sediment.

[0053] Reference Figure 5 and Figure 8 The feed pipe 42 is arranged on the partition plate 25 and its two ends are connected to the negative pressure chamber 211 and the positive pressure chamber 212. The bottom point of the inner wall of the feed pipe 42 is level with the bottom point of the upper surface of the overflow plate 41. The linear output member 43 is arranged on the support plate 23. The output end of the linear output member 43 extends horizontally into the negative pressure chamber 211 and the feed pipe 42. The feed plate 1 44 and the feed plate 2 45 are both fixedly connected to the output end. The feed plate 1 44 is located on the left side of the feed plate 2 45. The feed plate 1 44 and the feed plate 2 45 are slidably plugged into the upper surface of the overflow plate 41 and the inner wall of the feed pipe 42.

[0054] Reference Figure 5The second unloading plate 45 plays a sealing role, closing the negative pressure chamber 211 and the positive pressure chamber 212, starting the linear output member 43, driving the unloading plate 1 44 and the second unloading plate 45 to move, and the unloading plate 1 44 can push the solid sediment deposited on the overflow plate 41 into the unloading pipe 42, so that the solid sediment is pushed into the positive pressure chamber 212 along the unloading pipe 42.

[0055] Reference Figure 4 Specifically, the linear output member 43 can be a hydraulic cylinder, an electric push rod, etc., to achieve the purpose of reciprocating the blanking plate 1 44 and the blanking plate 2 45.

[0056] Reference Figure 2 and Figure 8 There are multiple positive pressure pipes 46, and the multiple positive pressure pipes 46 are evenly arranged along the circumference of the drum body 12. The positive pressure pipe 46 consists of a pipe three opened on the inner wall of the positive pressure chamber 212 and extending radially along the drum body 12, and a pipe four extending along the axis of the drum body 12. The pipe four matches the skeleton plate 13, and each skeleton plate 13 is provided with a plurality of through holes 48 arranged axially along the drum body 12. The positive pressure pipeline 47 is rotatably connected to the inner wall of the cavity 22 and communicated with the positive pressure chamber 212.

[0057] Reference Figure 2 and Figure 8 Due to the limitation of the connecting plate 26, the inside of the positive pressure pipe 46 located at the bottom of the positive pressure chamber 212 is under positive pressure, and air can be blown into the raw material pool 15 through the through hole 48, so as to avoid the material from flying around and affecting the environment as much as possible, and the solid sediment can be blown into the raw material pool 15 along the positive pressure pipe 46 and the through hole 48 at the bottom, so as to achieve the purpose of cleaning the solid sediment inside the drum body 12. At the same time, the positive pressure pipe 46 blows air and material into the raw material pool 15, which can play a turbulent role, disrupting the aggregation of solid sediment in the raw material pool 15, which is conducive to the solid sediment being adsorbed on the outer surface of the filter cloth 14.

[0058] Reference Figure 5 and Figure 7 The receiving groove 49 is opened on the right side wall of the supporting plate 23 , the diameter of the receiving groove 49 is larger than the diameter of the blanking plate 44 , and the blanking plate 44 is slidably inserted into the bottom wall of the receiving groove 49 .

[0059] Since the device works continuously, when the unloading plate 44 pushes the unloading, the sediment continues to descend and falls between the unloading plate 44 and the support plate 23. A receiving groove 49 is provided. When the unloading plate 44 is reset, the liquid and solid sediment between the unloading plate 44 and the support plate 23 are squeezed and pushed, so that the material can flow out along the gap between the circumferential side wall of the unloading plate 44 and the side wall of the receiving groove 49, avoiding the solid sediment from being squeezed in the gap as much as possible.

[0060] Among them, a filter is provided at the end of the negative pressure pipeline 32, which can block solid sediments, improve the stability of the device, reduce the risk of solid sediments flowing out of the negative pressure pipeline 32 along with the liquid, and is conducive to the collection and treatment of solid sediments.

[0061] The implementation principle of a filtering device for lithium carbonate production according to an embodiment of the present invention is as follows:

[0062] The material enters the internal cavity of the raw material pool 15 through the feeding port, and the negative pressure pipeline 32 is evacuated, and the negative pressure pipeline 31 is in a negative pressure state, so that the liquid in the raw material pool 15 is pumped into the negative pressure pipeline 31, and moves along the negative pressure pipeline 31 to the inside of the negative pressure chamber 211, and is then pumped away by the negative pressure pipeline 32. The solid sediment in the raw material pool 15 is adsorbed on the filter cloth 14 by the negative pressure. As the drum body 12 rotates, when the negative pressure pipeline 31 rotates to communicate with the air blowing pipeline 33, the air blowing pipeline 33 changes the environment in the negative pressure pipeline 31, and blows up the solid sediment adhered to the filter cloth 14. The blown solid sediment naturally falls onto the scraper plate 16 under the action of gravity. Some of the solid sediment on the filter cloth 14 is directly scraped off by the scraper plate 16, so that the solid sediment slides along the scraper plate 16 to the unloading conveyor belt 17 for transportation and collection, and the filtration is completed.

[0063] For the solid sediment inside the negative pressure pipe 31, when the negative pressure pipe 31 moves to the upper part of the drum body 12, the solid sediment inside it moves along the negative pressure pipe 31 to the negative pressure chamber 211 under the action of gravity and negative pressure, and settles on the overflow plate 41. The linear output member 43 controls the reciprocating movement of the discharge plate 1 44 and the discharge plate 2 45. The discharge plate 1 44 pushes the material on the overflow plate 41 into the discharge pipe 42, and the material falls into the positive pressure chamber 212. Under the action of positive pressure, the liquid and solid sediment in the positive pressure chamber 212 are blown into the raw material pool 15 along the positive pressure pipe 46 and the through hole 48.

[0064] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A filtering device for lithium carbonate production, comprising a drum body rotatably arranged on a frame, a plurality of skeleton plates, a plurality of filter cloths and a raw material pool, characterized in that: The drum body is provided with a connected cavity 1 and cavity 2 in the axial direction, and a support plate fixedly connected to the left side of the frame, a partition plate fixedly connected to the support plate through a plurality of connecting rods, and a vertical plate fixedly connected to the partition plate through a connecting plate are arranged in sequence in the axial direction of the drum body, the support plate is rotatably connected to the left side wall of the drum body, the connecting plate is fitted with the inner wall of cavity 1 and the connecting plate is open downward, the partition plate and the vertical plate are both rotatably connected to the inner wall of cavity 1, and the partition plate divides the interior of cavity 1 into a negative pressure chamber on the left and a positive pressure chamber on the right; The inner wall of the negative pressure chamber is provided with a plurality of negative pressure pipes corresponding to the filter cloths one by one, the support plate is provided with a negative pressure pipeline and an air blowing pipeline connected to the negative pressure chamber, a sealing plate and an arc-shaped overflow plate are provided between the support plate and the partition plate, the sealing plate enables the air blowing pipeline to be connected to one of the negative pressure pipelines, the overflow plate divides the negative pressure chamber into two connected upper and lower parts, a feed pipe connecting the negative pressure chamber and the positive pressure chamber is provided on the partition plate, a linear output part and a feed plate 1 and a feed plate 2 connected to the output end are provided on the support plate, the feed plate 1 and the feed plate 2 both reciprocate along the axial direction of the drum body and are slidably plugged into the inner wall of the feed pipe; The inner wall of the positive pressure cavity is provided with a plurality of positive pressure pipes corresponding to the frame plates one by one, the second inner wall of the cavity is rotatably connected with a positive pressure pipeline connected to the positive pressure cavity, and the frame plates are provided with a plurality of through holes.

2. A filtering device for lithium carbonate production according to claim 1, characterized in that: The sealing plate is a triangular plate with an opening at one end, and the opening is inclined upward.

3. A filtering device for lithium carbonate production according to claim 2, characterized in that: One end of the overflow plate abuts against the inner wall of the negative pressure chamber, and an overflow port is left between the other end of the overflow plate and the sealing plate.

4. A filtering device for lithium carbonate production according to claim 1, characterized in that: The first unloading plate is connected with the bottom point of the upper surface of the overflow plate.

5. A filtering device for lithium carbonate production according to claim 4, characterized in that: A receiving groove is provided on the right side of the support plate, the diameter of the receiving groove is larger than the diameter of the first blanking plate, and the first blanking plate is slidably inserted into the bottom wall of the receiving groove.

6. A filtering device for lithium carbonate production according to claim 1, characterized in that: A filter screen is provided at the end of the negative pressure pipeline.

7. A filtering device for lithium carbonate production according to claim 1, characterized in that: The negative pressure pipeline is composed of a pipeline 1 which is opened on the inner wall of the negative pressure cavity and extends radially along the drum body, and a pipeline 2 which extends axially along the drum body. The pipeline 2 is matched with the filter cloth.

8. A filtering device for lithium carbonate production according to claim 1, characterized in that: The positive pressure pipeline is composed of a pipeline three which is opened on the inner wall of the positive pressure cavity and extends radially along the drum body, and a pipeline four which extends along the axis of the drum body. The pipeline four matches the skeleton plate.

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