A recirculation filter device

Abstract

This application relates to the field of filtration technology and provides a circulating filtration device, including: a storage tank, a first filtration mechanism, a first conveying assembly, a second conveying assembly, and a drive mechanism; the storage tank has an inlet and an outlet; a primary filtration path is formed between the storage tank and the first filtration mechanism by the first conveying assembly; and a secondary filtration path is formed between the first conveying assembly and the first filtration mechanism by the second conveying assembly. This application forms an internal and external dual-circulation filtration path through the first and second conveying assemblies, and achieves multiple filtrations of materials using the same filtration mechanism, improving filtration efficiency without increasing the number of filtration components, while avoiding a bulky filtration device structure.

Description

Technical Field

[0001] This application relates to the field of filtration technology, specifically to a circulating filtration device. Background Technology

[0002] Filtration devices are based on the principle of physical interception. They separate impurities in fluids through filter media and are widely used in the chemical industry. They can improve the purity of fluids, protect downstream equipment, and improve product quality and production efficiency.

[0003] Existing filtration devices rely on stacking filter components to improve filtration efficiency. However, due to the limited use of individual filter components, their filtration function cannot be fully utilized, resulting in low filtration efficiency. Furthermore, a larger number of filter components not only increases the size of the filtration device and installation space costs, but may also lead to increased material resistance due to extended flow channels, further reducing filtration efficiency. Utility Model Content

[0004] This application addresses the aforementioned shortcomings of the prior art by providing a circulating filtration device, the specific solution of which is as follows:

[0005] A circulating filtration device includes: a storage tank, a first filtering mechanism, a drive mechanism, a first conveying assembly, and a second conveying assembly; the first filtering mechanism and the drive mechanism are disposed outside the storage tank; the storage tank has an inlet and an outlet. The first conveying assembly sequentially connects the inlet, the first filtering mechanism, the drive mechanism, and the outlet to form an external circulating filtration path between the storage tank and the first filtering mechanism.

[0006] One end of the second conveying component is disposed on the first filtering mechanism, or disposed on the first conveying component at a position between the discharge port and the first filtering mechanism, and the other end of the second conveying component is disposed on the first conveying component at a position between the driving mechanism and the inlet, for forming an internal circulation filtering path of the first filtering mechanism.

[0007] In some optional embodiments, a first valve body is provided on the first conveying assembly at a position between the discharge port and the first filtering mechanism. A second valve body is provided on the first conveying assembly at a position between the first filtering mechanism and the feed port.

[0008] One end of the second conveying component is disposed on the first filtering mechanism or on the first conveying component at a position between the first valve body and the first filtering mechanism, and the other end is disposed on the first conveying component at a position between the driving mechanism and the second valve body.

[0009] In some optional embodiments, the second conveying assembly includes a circulation pipe, a relay hopper, and a filter detection mechanism. One end of the circulation pipe is disposed on the first filter mechanism, or on the first conveying assembly at a position between the discharge port and the first filter mechanism, and the other end of the circulation pipe is disposed on the first conveying assembly at a position between the drive mechanism and the inlet.

[0010] The circulation pipeline is connected to the relay hopper, and the filtration detection mechanism is disposed in the relay hopper and electrically connected to the first valve body and the second valve body. The filtration detection mechanism is used to detect the degree of filtration of the material in the relay hopper and adjust the opening and closing of the first valve body and / or the second valve body according to the degree of filtration.

[0011] In some alternative embodiments, the second conveying assembly includes a material replenishment mechanism and at least one first discharge pipe. The material replenishment mechanism is detachably disposed on the first filtering mechanism, or disposed on the first conveying assembly at a position between the discharge port and the first filtering mechanism; the material replenishment mechanism includes a material replenishment port.

[0012] A third valve body is provided on the first discharge pipe. One end of the first discharge pipe is connected to a position on the first conveying assembly located between the drive mechanism and the feed port, and at least one end of the first discharge pipe is provided corresponding to the material replenishment port.

[0013] In some alternative embodiments, the material replenishment mechanism includes a funnel structure.

[0014] In some optional embodiments, the circulating filtration device further includes a second discharge pipe, one end of which is connected to the discharge port and / or the first conveying assembly, and the other end is used to connect to the outside. A switching valve is provided on the second discharge pipe.

[0015] In some optional embodiments, the circulating filtration device further includes a second filtration mechanism. The feed inlet includes a circulating feed inlet and an external material inlet; the storage tank is used to connect to the outside through the external material inlet; the storage tank is connected to the first conveying assembly through the circulating feed inlet; the second filtration mechanism is disposed in the storage tank at a position corresponding to the circulating feed inlet and / or the external material inlet.

[0016] In some alternative embodiments, the second filtration mechanism includes a filter basket detachably disposed within the storage tank; at least one layer of the filter basket covers the circulating feed inlet and the external material inlet.

[0017] In some alternative embodiments, the first filtration mechanism includes a filter box in which at least one filter element is detachably disposed.

[0018] In some optional embodiments, the circulating filtration device is further provided with a stirring mechanism, which includes a stirring drive and a stirring head. One end of the stirring drive is disposed at the top of the storage tank, and the stirring head is connected to the other end of the stirring drive, for mixing the material in the storage tank under the drive of the stirring drive.

[0019] Beneficial Effects: This application provides a circulating filtration device, including: a storage tank, a first filtration mechanism, a first conveying assembly, a second conveying assembly, and a drive mechanism; the storage tank has an inlet and an outlet; a primary filtration path is formed between the storage tank and the first filtration mechanism by setting the first conveying assembly; and a secondary filtration path is formed between the first conveying assembly and the first filtration mechanism by setting the second conveying assembly. This allows the user to increase the number of times the material in the storage tank is filtered by adjusting the flow rate and speed of the material between the first and second conveying assemblies. Users can increase the filtration levels without adding additional filtration components, increasing the recycling rate of the filtration mechanism, saving overall filtration time, and the device has a smaller overall footprint, simpler structure, and lower maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the circulating filtration device in this application;

[0022] Figure 2 This is a partial perspective structural diagram of the first and second filtration mechanisms of the circulating filtration device in this application;

[0023] Figure 3 This is a schematic diagram of the circulating filter device with a stirring mechanism in this application;

[0024] Figure 4 This is a schematic diagram of the circulating filtration device with a filtration detection mechanism in this application;

[0025] Figure 5 This is a schematic diagram showing the relative positions of the material replenishment mechanism and the first filtration mechanism in this application.

[0026] The attached diagram is labeled as follows: 1-Storage bin; 11-Inlet; 111-Circulating inlet; 112-External material inlet; 12-Outlet; 2-First filtration mechanism; 21-Filter box; 22-Filter element; 3-Drive mechanism; 4-First conveying assembly; 42-Second outlet pipe; 5-Second conveying assembly; 51-Material replenishment mechanism; 52-First outlet pipe; 53-Circulating pipeline; 54-Relay bin; 55-Filtration detection mechanism; 6-Second filtration mechanism; 61-Filter basket; 71-First valve body; 72-Second valve body; 73-Third valve body; 74-Switch valve; 8-Stirring mechanism; 81-Stirring drive component; 82-Stirring head; 91-Support frame; 92-Support platform. Detailed Implementation

[0027] The following will describe the concept, specific structure and technical effects of this utility model clearly and completely with reference to the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of this utility model.

[0028] Various embodiments of the present invention will be described more fully below. The present invention may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present invention to the specific embodiments disclosed herein, but rather the present invention should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of the present invention.

[0029] See Figure 1-4 As shown in the figure, this application provides a circulating filtration device, the specific solution of which is as follows:

[0030] A circulating filtration device includes: a storage tank 1, a first filtering mechanism 2, a driving mechanism 3, a first conveying assembly 4, and a second conveying assembly 5. The first filtering mechanism 2 and the driving mechanism 3 are disposed outside the storage tank 1; the storage tank 1 has an inlet 11 and an outlet 12; the first conveying assembly 4 sequentially connects the inlet 11, the first filtering mechanism 2, the driving mechanism 3, and the outlet 12 to form an external circulating filtration path between the storage tank 1 and the first filtering mechanism 2.

[0031] One end of the second conveying component 5 is disposed on the first filtering mechanism 2, or disposed on the first conveying component 4 at a position between the discharge port 12 and the first filtering mechanism 2, and the other end of the second conveying component 5 is disposed on the first conveying component 4 at a position between the driving mechanism 3 and the feed port 11, for forming an internal circulation filtering path of the first filtering mechanism 2.

[0032] In an optional embodiment, by setting a first conveying component 4 and a second conveying component 5, an external circulation filtration path is formed between the storage tank 1 and the first filtering mechanism 2, and an internal circulation filtration path is formed for the first filtering mechanism 2 located outside the storage tank 1. This allows the material to be filtered to be repeatedly passed through the first output component, through the external circulation filtration path, through the first filtering mechanism 2, and back to the storage tank 1 to complete the filtration. Alternatively, it can be further conveyed to the second conveying component 5 through the first conveying component 4, repeatedly passing through the internal circulation filtration path to complete rapid multiple filtrations, and then conveyed to the storage tank 1 through the first conveying component 4.

[0033] Specifically, users can adjust the amount of material output from the outlet 12 according to the actual filtration requirements of the material, and control the flow rate of the material by adjusting the power of the drive mechanism 3, so that the material can repeatedly pass through the external circulation filtration path and / or the internal circulation filtration path for centralized filtration.

[0034] Specifically, the first conveying component 4 and the second conveying component 5 include a conveying pipe. It should be noted that this embodiment does not specifically limit the diameter of the conveying pipe. Users can set the diameter of the conveying pipe according to the actual amount of material to be conveyed, and adjust the length of the conveying pipe according to the actual conveying distance.

[0035] In some optional embodiments, a first valve body 71 is provided on the first conveying assembly 4 at a position between the discharge port 12 and the first filtering mechanism 2. A second valve body 72 is provided on the first conveying assembly 4 at a position between the first filtering mechanism 2 and the feed port 11; one end of the second conveying assembly 5 is provided on the first filtering mechanism 2 or on the first conveying assembly 4 at a position between the first valve body 71 and the first filtering mechanism 2, and the other end is provided on the first conveying assembly 4 at a position between the drive mechanism 3 and the second valve body 72.

[0036] By setting the first valve body 71 and the second valve body 72 at corresponding positions on the first conveying assembly 4, the flow path of the material in the circulating filtration device can be controlled. For example, opening the first valve body 71 allows some material to flow out from the first valve body 71 and enter the first filtration mechanism 2 for filtration as it is conveyed by the first conveying assembly 4. After completing one filtration, driven by the drive mechanism 3, the material continues to move forward with the first conveying assembly 4. If the second valve body 72 is open, when the drive mechanism 3 has sufficient power, the material will further return to the storage tank 1 with the first conveying assembly 4, that is, complete one flow along the external circulating filtration path. If the second valve body 72 is closed, and the first valve body 71 closes after outputting a suitable amount of material for the internal circulating filtration path, the material will enter the second conveying assembly 5 and return to the first filtration mechanism 2 with the transmission of the second conveying assembly 5. It will then continue to be driven by the drive mechanism 3 to enter the first filtration mechanism 2 for filtration, thus completing one flow along the internal circulating filtration path, and can continue to complete multiple internal circulating filtrations along the internal circulating filtration path.

[0037] In some optional embodiments, the second conveying assembly 5 includes a circulation pipe 53, a relay hopper 54, and a filter detection mechanism 55. One end of the circulation pipe 53 is disposed on the first filter mechanism 2, or on the first conveying assembly 4 at a position between the discharge port 12 and the first filter mechanism 2, and the other end of the circulation pipe 53 is disposed on the first conveying assembly 4 at a position between the drive mechanism 3 and the feed port 11.

[0038] The circulation pipe 53 is connected to the relay tank 54, and the filter detection mechanism 55 is disposed in the relay tank 54. The filter detection mechanism 55 is electrically connected to the first valve body 71 and the second valve body 72. Specifically, the first valve body 71 and the second valve body 72 are electrically controlled valves.

[0039] In some optional embodiments, the filter detection mechanism 55 is electrically connected to an external host computer, which is also electrically connected to the first valve body 71 and the second valve body 72. Users can flexibly receive the detection data of the filter detection mechanism 55 through the external host computer and remotely adjust the first valve body 71 and the second valve body 72.

[0040] The filtration detection mechanism 55 is used to detect the filtration degree of the material in the relay hopper 54, and adjust the opening and closing of the first valve body 71 and / or the second valve body 72 according to the filtration degree. In specific applications, the filtration detection mechanism 55 can detect the purity of the material in the relay hopper 54 in real time, and further determine whether the filtration degree of the material has reached a preset value.

[0041] In some optional embodiments, the circulating filtration device further includes a support frame 91 for supporting the storage tank 1 and a support platform 92 for connecting the support frame 91. The relay tank 54, the first filtration mechanism 2 and the drive mechanism 3 can all be placed on the support platform 92 to stabilize the relative positions of the components.

[0042] In one specific embodiment, when the impurity concentration of the material is too high and the impurities are unevenly distributed, filtering the material solely through the external circulation filtration loop requires the material to pass through a long first conveying assembly 4 and then return to the storage tank 1 after one filtration by the first filtration mechanism 2, awaiting the next filtration. This results in a long overall time, low filtration efficiency, and an unclear filtration effect. Therefore, by flexibly controlling the first valve body 71 and the second valve body 72, the material in the storage tank 1 can be filtered in batches and centrally.

[0043] In an optional embodiment, a viewing window is provided on the relay bin 54, through which the user can directly observe the specific situation of the material flowing into the relay bin 54, so as to intuitively see the filtration effect of the material.

[0044] In some optional embodiments, the second conveying assembly 5 includes a material replenishment mechanism 51 and at least one first discharge pipe 52. The material replenishment mechanism 51 is detachably disposed on the first filtering mechanism 2, or disposed on the first conveying assembly 4 at a position between the discharge port 12 and the first filtering mechanism 2; the material replenishment mechanism 51 includes a material replenishment port. See Appendix Figure 1 and attached Figure 2 As shown, the material replenishment mechanism 51 can be directly installed on the first filtration mechanism 2, allowing the added material to undergo rapid initial filtration; see appendix. Figure 5 As shown, the material replenishment mechanism 51 can also be located at the outlet 12 and the first filter mechanism 2, and the added material can also be conveyed to the first filter mechanism 2 for filtration along with the first conveying component 4.

[0045] In practical applications, the material replenishment port is set at a height lower than the external material inlet 112 in the storage bin 1, which better meets the user's need for temporary material replenishment.

[0046] In actual chemical production processes, different chemical raw materials need to be mixed at different times and for different durations to react. Users need to add the appropriate chemical raw materials in a timely manner based on the actual reaction, mixing, and filtration status. By setting up a material replenishment mechanism 51, users can replenish materials at any time during the filtration process. The first discharge pipe 52, corresponding to the material replenishment port, allows users to directly obtain a sample of the material currently being filtered. Through rapid sample detection and observation, users can quickly determine whether the corresponding production material needs to be added.

[0047] A third valve body 73 is provided on the first discharge pipe 52; one end of the first discharge pipe 52 is connected to the position on the first conveying assembly 4 located between the drive mechanism 3 and the feed port 11, and at least one end of the first discharge pipe 52 is provided corresponding to the material replenishment port.

[0048] In some optional embodiments, the material replenishment mechanism 51 includes a funnel structure. By setting the material replenishment mechanism 51 as a funnel structure, which is wider at the top and narrower at the bottom, the first discharge pipe 52 can better correspond to the funnel structure, allowing the user to add materials more accurately and preventing material waste.

[0049] In some optional embodiments, the circulating filtration device further includes a second discharge pipe 42, one end of which is connected to the discharge port 12 and / or the first conveying assembly 4, and the other end is used to connect to the outside. A switching valve 74 is provided on the second discharge pipe 42. In a specific embodiment, the second discharge pipe 42 can be directly connected to the discharge port 12 to achieve direct output of the material in the storage tank 1 after the filtration process is completed; furthermore, it can also be connected to the first conveying assembly 4 to indirectly output the material flowing through the first conveying assembly 4 from the discharge port 12.

[0050] It should be noted that this embodiment does not specifically limit the exact location where the second discharge pipe 42 connects to the first conveying component 4. In some optional embodiments, the second discharge pipe 42 may be located on the first conveying component 4 between the drive mechanism 3, which is located after the first filtering mechanism 2, and the second valve body 72. Specifically, it may be located before or after the connection point between the second conveying component 5 and the first conveying component 4. Thus, after the material has undergone multiple cycles of filtration through the internal circulation filtration loop, when the user deems the material to have reached the preset filtration standard, the material can be directly output through the second discharge pipe 42 connected after the first filtering mechanism 2.

[0051] In an optional embodiment, when the material to be filtered is of high purity and meets the filtration requirements after being filtered by the first filtration mechanism 2, the material can be directly output using the second discharge pipe 42. Thus, the material in the storage bin 1 can be directly output without going through the complete first conveying assembly 4, eliminating the process of material returning to the storage bin 1 and being output again, which greatly saves the total time spent on the filtration process.

[0052] In some optional embodiments, the circulating filtration device further includes a second filtration mechanism 6. The feed inlet 11 includes a circulating feed inlet 111 and an external material inlet 112; the storage tank 1 is connected to the outside world through the external material inlet 112; the storage tank 1 is connected to the first conveying assembly 4 through the circulating feed inlet 111; the second filtration mechanism 6 is disposed within the storage tank 1 at a position corresponding to the circulating feed inlet 111 and / or the external material inlet 112. In practical applications, the feed inlet 11 is located at the top of the storage tank 1. Before performing the overall filtration process, the user inputs the material to be filtered into the storage tank 1 through the feed inlet 11, specifically through the external material inlet 112. A second filter mechanism 6 is provided at the feed inlet 11 and is positioned inside the storage tank 1 at the location corresponding to the circulating feed inlet 111 and the external material inlet 112. This allows for initial filtration of the material when it is first fed into the storage tank 1, reducing the filtration pressure on the first filter mechanism 2. When the material re-enters the storage tank 1 through the external circulation filtration path from the first filter mechanism 2, it can also be filtered again by the second filter mechanism 6, thus improving filtration efficiency.

[0053] In some alternative embodiments, see Appendix Figure 2 and attached Figure 4 As shown, the second filtration mechanism 6 includes a filter basket 61, which is detachably disposed within the storage tank 1; at least one layer of the filter basket 61 covers the circulating feed inlet 111 and the external material inlet 112. Specifically, the filter basket 61 may also be provided with multiple layers of replaceable filter media to further improve the filtration effect of the second filtration mechanism 6.

[0054] In an optional embodiment, the second filtration mechanism 6 includes multiple layers of filter baskets 61, with the pore size of the different layers of filter baskets 61 decreasing from the feed inlet 11 toward the storage tank 1. During the use of the circulating filtration device, various impurities are deposited in the filter baskets 61. By detachably setting the filter baskets 61, the user can clean and replace the filter baskets 61 and adjust the number of filter baskets 61 according to specific usage requirements.

[0055] In some alternative embodiments, see Appendix Figure 2 and attached Figure 3 As shown, the first filtration mechanism 2 includes a filter box 21, within which at least one filter element 22 is detachably disposed. Specifically, when the material to be filtered is a fluid or liquid, the filter element 22 includes a filter screen, and / or a filter membrane, and / or activated carbon fiber, and / or non-woven fabric. Users can set the number and type of filter elements 22 according to actual needs, and can flexibly maintain and replace the filter elements 22.

[0056] In some alternative embodiments, as shown in the appendix Figure 3 and attached Figure 4 As shown, the circulating filtration device also includes a stirring mechanism 8, which comprises a stirring drive 81 and a stirring head 82. The stirring drive 81 is located at the top of the storage tank 1, and the stirring head 82 is connected to the stirring drive 81, used to mix the material in the storage tank 1 under the drive of the stirring drive 81. It should be noted that this embodiment does not limit the specific number of stirring heads 82 in the circulating filtration device. In practical applications, the number of stirring heads 82 can be set according to the volume and capacity of the filter tank 21, and the shape of the stirring head 82 can be selected according to the specific properties of the material to be stirred.

[0057] This embodiment provides a circulating filtration device. An external circulating filtration path is formed by a first conveying component, connecting a storage tank to a first filtering mechanism, a drive mechanism, and a discharge port, achieving initial filtration and conveying of materials. An internal circulating filtration path is formed by a second conveying component, connecting the first filtering mechanism to the drive mechanism. Material filtered by the first filtering mechanism is reintroduced into the first filtering mechanism for secondary filtration, improving filtration efficiency. This dual-circulation filtration path allows for multiple uses of the same filtering mechanism without the need for additional filtering components, avoiding bulky filtration devices. Compared to the traditional stacking of multi-layered filtering components, this design is more compact and occupies less space.

[0058] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

[0059] In the foregoing, the terms “comprising” or “may include”, which may be used in various embodiments of the present invention, indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms “comprising,” “having,” and their cognates are intended only to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or adding one or more combinations of the foregoing.

[0060] In various embodiments of this utility model, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0061] The terms used in the various embodiments of this utility model (such as "first," "second," etc.) may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above terms do not limit the order and / or importance of the elements. The above terms are only used for the purpose of distinguishing one element from other elements. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of this utility model, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0062] It should be noted that, in this utility model, unless otherwise explicitly specified and defined, terms such as "installation," "connection," and "fixation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] In this utility model, those skilled in the art should understand that the terms indicating orientation or positional relationship in the text are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0064] The terminology used in the various embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of this invention. As used herein, the singular form is intended to include the plural form as well, unless clearly indicated above. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this invention pertain. The terms (such as those defined in commonly used dictionaries) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this invention.

Claims

1. A circulating filtration device, characterized in that, The circulating filtration device includes: a storage tank, a first filtration mechanism, a drive mechanism, a first conveying assembly, and a second conveying assembly; the first filtration mechanism and the drive mechanism are disposed outside the storage tank; the storage tank has an inlet and an outlet. The first conveying component is sequentially connected to the feed inlet, the first filtering mechanism, the driving mechanism, and the discharge outlet to form an external circulation filtering path between the storage tank and the first filtering mechanism; One end of the second conveying component is disposed on the first filtering mechanism, or disposed on the first conveying component at a position between the discharge port and the first filtering mechanism, and the other end of the second conveying component is disposed on the first conveying component at a position between the driving mechanism and the inlet, for forming an internal circulation filtering path of the first filtering mechanism.

2. The circulating filtration device according to claim 1, characterized in that, A first valve body is provided on the first conveying assembly at a position between the discharge port and the first filtering mechanism; A second valve body is provided on the first conveying assembly at a position between the first filtering mechanism and the feed inlet; One end of the second conveying component is disposed on the first filtering mechanism or on the first conveying component at a position between the first valve body and the first filtering mechanism, and the other end is disposed on the first conveying component at a position between the driving mechanism and the second valve body.

3. The circulating filtration device according to claim 2, characterized in that, The second conveying assembly includes a circulation pipeline, a relay hopper, and a filter detection mechanism; One end of the circulation pipe is disposed on the first filter mechanism, or disposed on the first conveying assembly at a position between the discharge port and the first filter mechanism, and the other end of the circulation pipe is disposed on the first conveying assembly at a position between the drive mechanism and the inlet. The intermediate material box is connected to the circulation pipeline, the filter detection mechanism is installed in the intermediate material box, and the filter detection mechanism is electrically connected to the first valve body and the second valve body; The filtration detection mechanism is used to detect the degree of filtration of the material in the relay hopper, and adjust the opening and closing of the first valve body and / or the second valve body according to the degree of filtration.

4. The circulating filtration device according to claim 1, characterized in that, The second conveying assembly includes a material replenishment mechanism and at least one first discharge pipe; The material replenishment mechanism is detachably mounted on the first filtering mechanism, or mounted on the first conveying assembly at a position between the discharge port and the first filtering mechanism; the material replenishment mechanism includes a material replenishment port; A third valve body is provided on the first discharge pipe; one end of the first discharge pipe is connected to the position on the first conveying assembly located between the drive mechanism and the feed port, and at least one end of the first discharge pipe is provided corresponding to the material replenishment port.

5. A circulating filtration device according to claim 4, characterized in that, The material replenishment mechanism includes a funnel structure.

6. A circulating filtration device according to claim 1, characterized in that, The circulating filtration device further includes a second discharge pipe, one end of which is connected to the discharge port and / or the first conveying component, and the other end is used to connect to the outside. A switching valve is provided on the second discharge pipe.

7. A circulating filtration device according to claim 1, characterized in that, The circulating filtration device also includes a second filtration mechanism; The feed inlet includes a circulating feed inlet and an external material inlet; the storage tank is used to connect to the outside world through the external material inlet; the storage tank is connected to the first conveying component through the circulating feed inlet; the second filtering mechanism is disposed in the storage tank at a position corresponding to the circulating feed inlet and / or the external material inlet.

8. A circulating filtration device according to claim 7, characterized in that, The second filtration mechanism includes a filter basket, which is detachably disposed within the storage tank; at least one layer of the filter basket covers the circulating feed inlet and the external material inlet.

9. A circulating filtration device according to claim 1, characterized in that, The first filtration mechanism includes a filter box, and at least one filter element is detachably disposed inside the filter box.

10. A circulating filtration device according to claim 1, characterized in that, The circulating filtration device is also equipped with a stirring mechanism, which includes a stirring drive and a stirring head; One end of the stirring drive is disposed on the top of the storage tank, and the stirring head is connected to the other end of the stirring drive, for mixing the material in the storage tank under the drive of the stirring drive.

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