Pipe filter device and precursor preparation system

Abstract

The utility model discloses a pipeline filtering device and front body preparation system, pipeline filtering device includes filter tube and filter, and filter installs on filter tube, and filter includes upper cover, shell and filter screen, and upper cover and the upper end of shell are detachably connected, and shell is equipped with filter cavity, filter import and filter export, and filter import and filter export are communicated with filter cavity respectively and are located the opposite sides of filter cavity respectively, and filter screen is located in filter cavity, and the height of filter screen upper end edge is lower than the upper end of filter export and is higher than the lower end of filter export. The utility model can filter the material that flows through the pipeline, and avoid the accident of front end process equipment abnormal shutdown due to filter blockage.

Description

Technical Field

[0001] This utility model relates to the field of battery precursor production equipment technology, and in particular to pipeline filtration device and precursor preparation system. Background Technology

[0002] The precursor is prepared by reaction in a reactor. The slurry in the reactor will continuously crystallize into scale on the inner wall of the reactor. The scale will corrode and rust when it is in contact with the reactor wall for a long time. During the production process, due to the stirring action, the slurry will continuously wash the scale on the reactor wall, causing it to fall off in pieces. The large pieces of detached material are washed into many small foreign objects. Moreover, these foreign objects do not meet the requirements of the target product, so it is necessary to intercept the foreign objects entering the aging tank.

[0003] In existing technologies, foreign objects are generally filtered out by a filter screen, and workers clean the filter screen regularly. However, the content of foreign objects in the slurry is not a fixed value. When there are too many foreign objects in the slurry, the filter screen may be blocked by foreign objects before the cleaning time, and the material cannot flow smoothly from the reactor to the aging tank, which may cause the reactor to shut down abnormally or even damage the reactor itself. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a pipeline filtration device and a precursor preparation system.

[0005] The solution to the technical problem of this utility model is:

[0006] Firstly, a pipeline filtration device is proposed, comprising:

[0007] Filter tube;

[0008] A filter is installed on a filter tube. The filter includes a top cover, a housing, and a filter screen. The top cover is detachably connected to the upper end of the housing. The housing has a filter chamber, a filter inlet, and a filter outlet. The filter inlet and the filter outlet are respectively connected to the filter chamber and are located on opposite sides of the filter chamber. The filter screen is disposed in the filter chamber. The height of the upper edge of the filter screen is lower than the upper end of the filter outlet and higher than the lower end of the filter outlet.

[0009] This invention has at least the following beneficial effects: Material enters the filter chamber through the filter inlet, and after foreign matter is intercepted by the filter screen, it flows out of the filter chamber through the filter outlet. When the filter screen is clogged with foreign matter, because the upper edge of the filter screen is lower than the upper end of the filter outlet, the material can flow out from the upper side of the filter screen to the filter outlet, avoiding clogging in the filter and preventing abnormal shutdown of the upstream process equipment. When the foreign matter content in the downstream process equipment is found to be too high, the operator can open the top cover to clean the filter screen located in the filter chamber to ensure the filtration effect.

[0010] As a further improvement to the above technical solution, at least two filters are provided on the filter tube, and the filters are arranged in series through the filter tube. Material that is not blocked by the filter screen flows along the filter tube into the next filter, where it is filtered to prevent foreign objects from entering the next process equipment with the material and affecting production quality.

[0011] As a further improvement to the above technical solution, the filter also includes a demagnetizing component for adsorbing magnetic foreign objects, the demagnetizing component being disposed within the filter chamber. Magnetic foreign objects can be adsorbed by the demagnetizing component, achieving efficient separation of the foreign objects, which is beneficial for subsequent collection and recycling of the magnetic foreign objects.

[0012] As a further improvement to the above technical solution, the filter screen is detachably disposed in the filter chamber. The filter screen includes a bottom screen and side screens. The bottom screen covers the bottom surface of the filter chamber, and the lower end of the side screen is connected to the bottom screen. The upper edge of the side screen is lower than the upper end of the filter outlet but higher than the lower end of the filter outlet. The side screen can filter the material flowing towards the filter outlet. Foreign objects intercepted will remain on the bottom screen. After the operator opens the top cover, the filter screen can be removed. During the removal process, the foreign objects are also removed from the filter chamber under the support of the bottom screen, facilitating cleaning by the operator.

[0013] As a further improvement to the above technical solution, the filter screen also includes a frame. The lower end of the frame is connected to the bottom screen and is disposed along the edge of the bottom screen. The height of the frame is lower than the lower ends of the filter inlet and the filter outlet. During the removal of the filter screen, foreign objects remain on the bottom screen, and the frame design prevents foreign objects from leaking from the edge of the bottom screen.

[0014] As a further improvement to the above technical solution, the side screen has an arc-shaped structure and is located on the side of the bottom screen near the filter outlet. This arrangement effectively utilizes the space of the filter chamber, allowing more foreign objects to remain on the bottom screen, preventing the accumulation of foreign objects at the filter inlet, and further avoiding filter clogging.

[0015] As a further improvement to the above technical solution, a gap exists between the side screen and the inner wall of the filter chamber. The filter screen also includes a baffle plate, which is connected to the end face of the side screen near the filter inlet and abuts against the inner wall of the filter chamber. This arrangement allows for expansion space to be reserved for the thermal expansion of the side screen, facilitating its removal from the filter chamber. Furthermore, the baffle plate blocks the opening of the expansion space, ensuring that the material enters the filter outlet after passing through the side screen, thereby guaranteeing the filtration effect.

[0016] As a further improvement to the above technical solution, the demagnetizing assembly includes at least one sleeve and at least one magnetic rod. The sleeve has an upward-opening mounting cavity, and the magnetic rod is detachably disposed within the mounting cavity. The magnetic rod is magnetic, and under the action of the magnetic rod, magnetic foreign objects can be attracted to the surface of the sleeve. When it is necessary to clean the magnetic foreign objects, the magnetic rod is separated from the sleeve, the sleeve loses its magnetism, and the magnetic foreign objects attracted to the surface of the sleeve can be easily detached from the surface of the sleeve.

[0017] As a further improvement to the above technical solution, the pipeline filtration device includes at least two filter pipes, with the inlet ends of each filter pipe interconnected and the outlet ends of each filter pipe interconnected. The pipeline filtration device also includes a switching valve, which is located at the inlet and outlet ends of each filter pipe. The filter pipes are arranged in parallel. When it is necessary to clean the filter on one of the filter pipes, the switching valve on that filter pipe is closed, and the filter on that filter pipe can be cleaned. The material is then filtered through the other filter pipes and their filters, without requiring shutdown of the equipment in the preceding and following processes.

[0018] Secondly, a precursor preparation system is proposed, comprising a reactor, an aging tank, and a pipeline filtration device as described in any of the above technical solutions, wherein the pipeline filtration device is located between the outlet of the reactor and the inlet of the aging tank. Because of the pipeline filtration device, the slurry flowing from the reactor to the aging tank can be filtered, preventing filter clogging and abnormal reactor shutdowns, thus avoiding the impact of abnormal shutdowns on production efficiency and damage to the reactor. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the pipeline filtration device according to an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the filter according to an embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the filter according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the filter according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the filter screen according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the overall structure of the precursor preparation system according to an embodiment of the present invention.

[0026] Reference numerals: 100, filter; 110, top cover; 111, handle; 120, housing; 121, filter chamber; 122, filter inlet; 123, filter outlet; 130, filter screen; 131, side screen; 132, bottom screen; 133, frame; 134, baffle plate; 140, demagnetizing assembly; 141, sleeve; 142, magnetic rod; 200, filter tube; 300, switch valve; 400, reaction vessel; 500, aging tank; 600, overflow valve; 700, overflow pipe. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. The various technical features of this utility model can be combined interactively without contradicting each other.

[0032] Reference Figure 1 Firstly, this utility model embodiment proposes a pipeline filtration device that can filter materials passing through the pipeline, and during the filtration process, it will not cause blockages that could lead to abnormal shutdowns of upstream equipment.

[0033] In this embodiment, the pipeline filtration device includes a filter pipe 200 and a filter 100, with the filter 100 mounted on the filter pipe 200. (Refer to...) Figure 2 , Figure 3 and Figure 4 The filter 100 includes a top cover 110, a housing 120, and a filter screen 130. The housing 120 is provided with a filter chamber 121. The top cover 110 is detachably connected to the upper end of the housing 120 and can open or close the filter chamber 121. The housing 120 is also provided with a filter inlet 122 and a filter outlet 123. The filter inlet 122 and the filter outlet 123 are respectively connected to the filter chamber 121 and are located on opposite sides of the filter chamber 121. The material enters the filter chamber 121 through the filter inlet 122, is filtered in the filter chamber 121, and is discharged to the next process equipment through the filter outlet 123.

[0034] The filter screen 130 is disposed inside the filter chamber 121. The height of the upper edge of the filter screen 130 is lower than the upper end of the filter outlet 123 but higher than the lower end of the filter outlet 123. The filter screen 130 can effectively intercept foreign objects in the material. If there are too many foreign objects in the material, and the foreign objects clog the filter screen 130 and are not cleaned in time, the material can flow out from the upper side of the filter screen 130 to the filter outlet 123, avoiding the situation where the material clogs in the filter 100 and causes abnormal shutdown of the upstream and downstream equipment.

[0035] Understandably, when it is found that the content of foreign matter in the downstream process equipment is too high, it can be determined that the filter screen 130 is blocked. The operator can open the top cover 110 and clean the filter screen 130 located in the filter chamber 121 to ensure the filtration effect.

[0036] In some embodiments, at least two filters 100 are installed in series on the filter tube 200, with the filter outlet 123 of the front filter 100 connected to the filter inlet 122 of the next filter 100. It is understood that operators determine the cleaning frequency based on the filter 100 closest to the upstream process in the filter tube 200, periodically cleaning foreign objects from the filter chamber 121 by opening the top cover 110 to ensure the filtration effect of the filter 100. Setting up multiple filters 100 provides multiple layers of protection. When the filter screen 130 of the front filter 100 becomes clogged, material flows into the next filter 100 without being filtered by the filter screen 130, where it is filtered by the filter screen 130 to remove foreign objects from the material, preventing them from entering the next process and affecting production quality.

[0037] In some embodiments, the pipeline filtration device further includes a demagnetizing component 140, which is used to demagnetize the material. It is disposed in the filter chamber 121 and can adsorb magnetic foreign objects in the material flowing into the filter chamber 121.

[0038] The pipeline filtration device of this embodiment can be applied in a precursor preparation system, such as the preparation process of nickel-cobalt-manganese precursors. After the material obtained from the reaction in the reactor 400 passes through the pipeline filtration device, it enters the aging tank 500 for aging. The slurry in the reactor will continuously crystallize into scale on the inner wall of the reactor 400. The scale will corrode and rust due to prolonged contact with the reactor 400 wall. During the production process, due to the stirring action, the slurry will continuously wash away the scale on the reactor wall, causing it to fall off in pieces. Large pieces of the fallen material are washed into many small foreign objects. Moreover, the nickel-cobalt-manganese content of these foreign objects does not match the target product. Furthermore, due to their high hardness, they will cause friction with the stainless steel contact surface in the subsequent process, thereby generating more magnetic foreign objects, which will further affect the safety performance of the material.

[0039] These magnetic foreign objects are adsorbed by the demagnetizing component 140, achieving efficient separation of foreign objects containing nickel-cobalt-manganese precursors, which is beneficial for the subsequent collection and recycling of magnetic foreign objects.

[0040] In some embodiments, the filter screen 130 is detachably connected to the inner wall of the filter chamber 121. After the operator opens the top cover 110, the filter screen 130 can be removed from the filter chamber 121, which can deeply clean the foreign objects clogging the mesh of the filter screen 130 to ensure the filtration effect of the filter screen 130.

[0041] Additionally, the filter screen 130 can be replaced with the required mesh size according to actual production needs. Generally, the larger the mesh size of the filter screen 130, the more impurities are intercepted, but the longer the interception time. The appropriate screen size can be selected based on production requirements. In ternary precursor preparation systems, a filter screen 130 with a mesh size greater than or equal to 20 mesh and less than or equal to 100 mesh is used for interception and filtration. When the level of foreign matter is high, a filter screen 130 with a mesh size greater than or equal to 100 mesh and less than or equal to 300 mesh can be used for interception and filtration.

[0042] Reference Figure 4 and Figure 5 In some embodiments, the filter screen 130 includes a bottom screen 132 and a side screen 131. The bottom screen 132 covers the bottom surface of the filter chamber 121, the lower end of the side screen 131 is connected to the bottom screen 132, and the height of the upper edge of the side screen 131 is lower than the upper end of the filter outlet 123 and higher than the lower end of the filter outlet 123.

[0043] The side screen 131 can filter the material flowing to the filter outlet 123 and intercept foreign objects in the material. The intercepted foreign objects will remain on the bottom screen 132. After filtering for a period of time, the operator can open the top cover 110 and take out the filter screen 130. The foreign objects are taken out of the filter chamber 121 together with the support of the bottom screen 132, so that the operator can clean the foreign objects.

[0044] In some embodiments, the filter screen 130 further includes a frame 133, the lower end of which is connected to the bottom screen 132 and is disposed along the edge of the bottom screen 132. During the removal of the filter screen 130, foreign objects remain on the bottom screen 132, and the frame 133 prevents foreign objects from leaking from the edge of the bottom screen 132.

[0045] Understandably, the height of the frame 133 is lower than the lower ends of the filter inlet 122 and the filter outlet 123, which can prevent the frame 133 from blocking the material when it enters or exits the filter chamber 121. Preferably, the height of the frame 133 is greater than or equal to 20 cm and less than or equal to 30 cm.

[0046] In some embodiments, the side screen 131 has an arc-shaped structure along the inner wall of the filter chamber 121. The side screen 131 is located on the side of the bottom screen 132 near the filter outlet 123 and protrudes towards the filter outlet 123. This arrangement can effectively utilize the space of the filter chamber 121, allowing more foreign objects to remain on the bottom screen 132, avoiding the accumulation of foreign objects at the filter inlet 122, and further preventing the filter 100 from becoming clogged.

[0047] In addition, for the filter 100 equipped with the demagnetizing component 140, the arc-shaped side screen 131 can provide a large space for the installation of the demagnetizing component 140. The demagnetizing component 140 is located on the side of the side screen 131 facing the filter inlet 122. After the material enters the filter chamber 121 through the filter inlet 122, it is first demagnetized by the demagnetizing component 140, and then intercepted by the side screen 131. This is conducive to allowing more magnetic foreign objects to be adsorbed by the demagnetizing component 140.

[0048] In some embodiments, there is a gap between the side screen 131 and the inner wall surface of the filter chamber 121. The filter screen 130 also includes a baffle plate 134, which is connected to the end face of the side screen 131 near the filter inlet 122 and avoids contact with the filter chamber 121.

[0049] Understandably, when a pipeline filter is used to filter high-temperature materials, such as between the reactor 400 and aging tank 500 in a nickel-cobalt-manganese precursor preparation system, the material entering the filter chamber 121 is at a high temperature. If the side screen 131 is installed flush against the inner wall of the filter chamber 121, the friction between the side screen 131 and the inner wall increases after the side screen 131 expands due to heat, making it difficult to remove the filter screen 130 from the filter chamber 121. Therefore, in this embodiment, an expansion space is reserved between the side screen 131 and the inner wall of the filter chamber 121 to facilitate the removal and cleaning of the filter screen 130.

[0050] The baffle 134 can block the opening of the expansion space facing the filter inlet 122, ensuring that the material enters the filter outlet 123 after being filtered by the side screen 131, and preventing the material from flowing directly out of the expansion space to the filter outlet 123 without passing through the side screen 131, so as to ensure the filtration effect of the pipeline filter device on the material.

[0051] In some embodiments, refer to Figure 3The demagnetizing assembly 140 includes at least one sleeve 141 and at least one magnetic rod 142. The sleeve 141 has an upwardly opening mounting cavity, and the magnetic rod 142 is detachably disposed within the mounting cavity. The magnetic rod 142 is used to adsorb magnetic foreign objects in the material, attracting them to the surface of the sleeve 141 by the magnetic force of the magnetic rod 142. When it is necessary to clean the magnetic foreign objects from the demagnetizing assembly 140, the demagnetizing assembly 140 is removed from the filter chamber 121, and the magnetic rod 142 is removed from the mounting cavity. The sleeve 141 loses its magnetism, and the magnetic foreign objects adsorbed on the surface of the sleeve 141 can be easily detached from the surface of the sleeve 141.

[0052] In this embodiment, multiple magnetic rods 142 are provided, and multiple sleeves 141 are correspondingly provided, with each sleeve 141 being fitted onto the outer periphery of the corresponding magnetic rod 142. It can be understood that providing multiple magnetic rods 142 can improve the attraction force on magnetic foreign objects in the material and effectively remove magnetic foreign objects from the material.

[0053] In some embodiments, to facilitate the removal of the demagnetizing assembly 140 from the filter chamber 121, the upper end of the magnetic rod 142 is connected to the upper cover 110. The demagnetizing assembly 140 also includes a connecting plate, and the upper ends of each sleeve 141 are respectively connected to the connecting plate. When the upper cover 110 is opened, the magnetic rod 142 connected to the upper cover 110 can leave the filter chamber 121 as the upper cover 110 moves. The operator can lift the connecting plate upwards to remove each sleeve 141 from the filter chamber 121 for cleaning.

[0054] In some embodiments, refer to Figure 1 The pipeline filtration device includes at least two filter pipes 200, with their inlet ends and outlet ends interconnected, meaning each filter pipe 200 is arranged in parallel. The pipeline filtration device also includes on / off valves 300, which are located at the inlet and outlet ends of each filter pipe 200. Filters 100 located on the same filter pipe 200 are installed in series between the two on / off valves 300 on that filter pipe 200.

[0055] Understandably, after closing the two switch valves 300 on one of the filter tubes 200, the material will not enter that filter tube 200, nor will it enter the filter 100 installed on that filter tube 200. At this time, the operator can open the top cover 110 to clean the inside of the filter chamber 121, or remove the filter 100 from the filter tube 200 for maintenance. The other filter tubes 200 and the filters 100 installed on other filter tubes 200 can continue to be used normally, ensuring the normal and stable production of the production line. The cleaning and maintenance of the filters 100 do not require stopping the equipment in the preceding and following processes.

[0056] Specifically, the switch valve 300 located at the inlet end of the filter tube 200 can prevent material from flowing into the filter 100 from the previous process equipment, and the switch valve 300 located at the outlet end of the filter tube 200 can prevent material from flowing back into the filter 100 from the next process equipment.

[0057] In this embodiment, the pipeline filtration device has two filter pipes 200. This arrangement ensures that the entire system can continue to operate normally while cleaning one of the filter pipes 200. In this embodiment, each filter pipe 200 is equipped with two filters 100. This arrangement, along with regular cleaning of the filters 100, can prevent clogging while maintaining the filtration effect.

[0058] Understandably, to facilitate the installation of the filter 100, each filter tube 200 is divided into a first section, a second section, and a third section. The switch valve 300 is installed on the first section and the third section respectively. The filter inlet 122 and the filter outlet 123 of one filter 100 are connected to the first section and the second section respectively, and the filter inlet 122 and the filter outlet 123 of the other filter 100 are connected to the second section and the third section respectively.

[0059] For a filter pipe 200 with more filters 100, multiple second pipe sections can be provided, and two adjacent filters 100 are connected through the second pipe sections. In some embodiments, the filters 100 are connected to the first pipe section, the second pipe section, or the third pipe section through flanges.

[0060] The cleaning frequency of filter 100 is set according to actual production needs. For filter screens 130 with a smaller mesh size, such as those with a mesh size greater than or equal to 20 mesh and less than or equal to 100 mesh, the cleaning interval can be set to greater than or equal to 12 hours and less than or equal to 24 hours. For filter screens 130 with a larger mesh size, the cleaning interval needs to be shortened. For example, for filter screens 130 with a mesh size greater than or equal to 100 mesh and less than or equal to 300 mesh, the cleaning interval can be set to greater than or equal to 2 hours and less than or equal to 4 hours.

[0061] In some embodiments, refer to Figure 2 The upper surface of the cover 110 is provided with a handle 111, which provides a fulcrum for the operator to open the cover 110, so as to open the cover 110 and expose the filter chamber 121, making it easier for the operator to clean the filter 100.

[0062] In some embodiments, a sealing ring is wrapped around the side of the top cover 110. When the top cover 110 is placed over the housing 120, the sealing ring seals the gap between the top cover 110 and the housing 120, preventing outside air from entering the system and causing material oxidation. The sealing ring can be made of rubber.

[0063] Secondly, this utility model embodiment proposes a precursor preparation system, referring to... Figure 6 It can be used to produce ternary precursors such as nickel-cobalt-manganese, which include a reactor 400, an aging tank 500, and a pipeline filtration device as proposed in any embodiment of the first aspect. The pipeline filtration device is located between the outlet of the reactor 400 and the inlet of the aging tank 500, and can filter the material flowing from the reactor 400 to the aging tank 500 to prevent foreign objects from entering the aging tank 500 and affecting product quality.

[0064] Due to the special structure of the filter screen 130 in the filter 100, when the filter screen 130 is clogged, the filter 100 will not be clogged, and the slurry flowing out of the reactor 400 can smoothly enter the aging tank 500 without causing the reactor 400 to shut down abnormally.

[0065] In some embodiments, multiple filters 100 are installed in series on the filter tube 200. Even if the filter screen 130 in the filter 100 near the reactor 400 is blocked and cannot filter the material, the material can still flow smoothly out of the filter 100 through the top of the blocked filter screen 130 and flow to the next filter 100 for filtration, ensuring that the foreign matter content of the material flowing into the aging tank 500 is lower than the process requirements and ensuring product quality.

[0066] In this embodiment, the precursor preparation system also includes an overflow pipe 700 and an overflow valve 600. The overflow valve 600 is installed at the outlet end of the reactor 400. The inlet end of the overflow pipe 700 is connected to the overflow valve 600, and the outlet end is connected to the inlet end of each filter pipe 200. The height of the overflow pipe 700 gradually decreases from the inlet end to the outlet end. The material can flow into the pipeline filter device for filtration by gravity without the need for additional drive components, thus reducing the energy consumption for precursor preparation.

[0067] In some embodiments, the precursor preparation system is provided with multiple reactors 400, and each of the multiple reactors 400 is equipped with an overflow valve 600 at its outlet end and is connected to an overflow pipe 700, which can improve reaction efficiency and increase yield.

[0068] When preparing nickel-cobalt-manganese precursors using the precursor preparation system of this embodiment, molten metal, liquid alkali, and ammonia are injected into the reactor 400 at a certain flow rate and react to generate nickel-cobalt-manganese precursor slurry. When the liquid level in the reactor 400 reaches the height of the overflow valve 600, the overflow valve 600 and each of the switch valves 300 are opened, and the slurry continuously flows out from the overflow valve 600 of the reactor 400 and enters the overflow pipe 700. The slurry flows by gravity through the inlet pipe filtration device and through each filter 100, and finally flows into the aging tank 500.

[0069] When the slurry passes through the filter 100, the magnetic rod 142 attracts magnetic foreign objects in the slurry. As the slurry continuously washes against the filter screen 130, large particles in the slurry are intercepted by the side screen 131 and loaded onto the bottom screen 132. After the filter 100 has been filtering for a certain period of time, the magnetic foreign objects attracted by the magnetic rod 142 and the large particles intercepted by the filter screen 130 need to be cleaned. The cleaned-off foreign objects are then recycled.

[0070] When the filter screen 130 in one filter 100 becomes clogged, the slurry can flow out from the top of the clogged side screen 131 to the next filter 100 located on the same filter tube 200, and be filtered by the next filter 100 located on the same filter tube 200, thus preventing the filter 100 from becoming clogged and causing the reactor 400 to shut down. At this time, the filter 100 on the filter tube 200 needs to be cleaned. Before cleaning the filter 100, first close the switch valve 300 of the filter tube 200, and the slurry flows to the aging tank 500 through another filter tube 200. Then remove the cover 110 of the filter 100 that needs to be cleaned. Magnetic foreign objects are attracted to the outside of the sleeve 141 by the magnetism of the magnetic rod 142. Remove the sleeve 141 from the magnetic rod 142, and the magnetic foreign objects on the cover will lose their magnetic attraction. Cleaning with water will allow the magnetic foreign objects to fall off the sleeve 141. Slowly remove the filter screen 130. Because the filter screen 130 has a frame 133 of a certain height, the intercepted foreign objects will remain on the bottom screen 132 and will not fall off the edge of the bottom screen due to the obstruction of the frame 133. After cleaning the filter screen 130, put the filter screen 130 back into the filter chamber 121, cover it with the top cover 110, and open the switch valve 300 corresponding to the filter tube 200.

[0071] This invention effectively reduces magnetic foreign objects and large particles in the slurry, enabling efficient separation and recovery of foreign matter. The filter 100 has a simple structure, is easy to maintain, and has a low failure rate. The cleverly designed filter screen 130 in the filter 100 prevents the intercepted material from being lost after removal. Furthermore, even if the side screen 131 becomes clogged, the filter 100 remains unclogged, preventing abnormal shutdown of the reactor 400. The pipeline filtration device, applied in the precursor preparation system, enables continuous demagnetization and filtration of the slurry during ternary precursor production. Combined with the cleverly designed overflow pipe 700, the slurry enters the pipeline filtration device by gravity for demagnetization and filtration, requiring no energy consumption during the process.

[0072] It is understood that the pipeline filtration device of this utility model embodiment can not only be applied to the interception and filtration of nickel-cobalt-manganese precursor slurry, but also to other systems of slurry with a certain solid content. It has a wide range of applications and is of practical significance for improving the demagnetization and foreign matter removal process of ternary precursors.

[0073] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A pipeline filtration device, characterized in that, include: Filter tube (200); A filter (100) is installed on the filter tube (200). The filter (100) includes a top cover (110), a housing (120), and a filter screen (130). The top cover (110) is detachably connected to the upper end of the housing (120). The housing (120) is provided with a filter chamber (121), a filter inlet (122), and a filter outlet (123). The filter inlet (122) and the filter outlet (123) are respectively connected to the filter chamber (121) and are respectively located on opposite sides of the filter chamber (121). The filter screen (130) is disposed in the filter chamber (121). The height of the upper edge of the filter screen (130) is lower than the upper end of the filter outlet (123) and higher than the lower end of the filter outlet (123).

2. The pipeline filtration device according to claim 1, characterized in that, At least two filters (100) are provided on the filter tube (200), and the filters (100) are arranged in series through the filter tube (200).

3. The pipeline filtration device according to claim 1, characterized in that, The filter (100) further includes a demagnetizing component (140) for adsorbing magnetic foreign objects, the demagnetizing component (140) being disposed within the filter chamber (121).

4. The pipeline filtration device according to claim 1, characterized in that, The filter screen (130) is detachably disposed in the filter chamber (121). The filter screen (130) includes a bottom screen (132) and a side screen (131). The bottom screen (132) covers the bottom surface of the filter chamber (121). The lower end of the side screen (131) is connected to the bottom screen (132). The height of the upper edge of the side screen (131) is lower than the upper end of the filter outlet (123) and higher than the lower end of the filter outlet (123).

5. The pipeline filtration device according to claim 4, characterized in that, The filter screen (130) also includes a frame (133), the lower end of which is connected to the bottom screen (132) and is set along the edge of the bottom screen (132). The height of the frame (133) is lower than the lower ends of the filter inlet (122) and the filter outlet (123).

6. The pipeline filtration device according to claim 4, characterized in that, The side screen (131) has an arc-shaped structure and is located on the side of the bottom screen (132) near the filter outlet (123).

7. The pipeline filtration device according to claim 6, characterized in that, There is a gap between the side screen (131) and the inner wall of the filter chamber (121). The filter screen (130) also includes a baffle plate (134), which is connected to the end face of the side screen (131) near the filter inlet (122) and abuts against the inner wall of the filter chamber (121).

8. The pipeline filtration device according to claim 3, characterized in that, The demagnetizing assembly (140) includes at least one sleeve (141) and at least one magnetic rod (142). The sleeve (141) has an upwardly opening mounting cavity, and the magnetic rod (142) is detachably disposed within the mounting cavity.

9. The pipeline filtration device according to claim 1, characterized in that, The pipeline filtration device includes at least two filter tubes (200), the inlet ends of each filter tube (200) are connected to each other, and the outlet ends of each filter tube (200) are connected to each other. The pipeline filtration device also includes a switch valve (300), which is located at the inlet end and the outlet end of each filter tube (200).

10. A precursor preparation system, characterized in that, It includes a reactor (400), an aging tank (500), and a pipeline filtration device as described in any one of claims 1 to 9, wherein the pipeline filtration device is located between the outlet of the reactor (400) and the inlet of the aging tank (500).

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