Factory prefabricated steel structure fiber filter

Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a factory prefabricated steel structure fiber filter which comprises a water collecting box, a water inlet is formed outside the water collecting box, the output end of the water inlet is communicated with a water distributor, a supporting frame is fixed in the water collecting box, and an adjusting rod is rotationally connected in the supporting frame; according to the device disclosed by the invention, through the cooperation of structures such as the mounting frame, the air pump and the corrugated conveying pipe, the device can realize large-range uniform disturbance of aeration backflushing, the mounting frame provides stable support for the aeration assembly, and the aeration assembly is prevented from being blocked by the air pump, so that the device is convenient to use. The air flow generated by the air pump is conveyed to the aeration pipeline through the corrugated conveying pipe to drive the aeration pipe to synchronously rotate and reciprocate, so that the aeration coverage range is expanded, the pollutant interception area at the bottom end of the fiber filter element is fully disturbed, the backwashing energy consumption is reduced, and the effects of strengthening the backwashing effect and avoiding filter material hardening are finally achieved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically a factory-prefabricated steel structure fiber filter. Background Technology

[0002] Fiber filters, with their high filtration rate and strong interception capacity, have been widely used in wastewater treatment, coal-containing wastewater treatment, circulating water drainage, and raw water pretreatment. Compared to traditional sand filters, they offer significant advantages in terms of floor space and treatment efficiency, making them an important piece of equipment for municipal and industrial water treatment. To address the problems of long construction cycles and uncontrollable on-site construction quality associated with traditional concrete filters, steel structure fiber filters have emerged. Through factory prefabrication and on-site assembly, they enable rapid installation, significantly shortening the project cycle and adapting to the construction needs of different sites. Existing fiber filters... Most aeration devices are fixed structures, which limit the aeration range and result in uneven air distribution. The bottom of the fiber filter element, as the key area for pollutant interception, cannot receive sufficient aeration disturbance. This makes it difficult to effectively remove pollutants from the surface and inside of the filter element during backwashing. Not only does it require a high-power blower to provide a high air volume to achieve a basic washing effect, resulting in high energy consumption, but it is also easy for pollutants to remain on the filter element due to incomplete washing, causing filter media caking, reducing the filtration performance and service life of the filter element. If filter media debris or pollutants that have not been washed away from the equipment are detached during backwashing, they may also be mixed into the effluent, further affecting the sewage treatment effect.

[0003] CN118307164B discloses a gas-floating flocculation sedimentation fiber filter, which includes a filter element clamp and a fiber filter element. The pore size of the fiber filter element gradually decreases along the water flow direction. The top of the fiber filter element has a larger pore size to capture and intercept large suspended solids, while the bottom of the fiber filter element has a smaller pore size to intercept small suspended solids. This achieves multi-stage deep filtration and improves the filtration effect on wastewater. At the same time, backwash gas is provided from bottom to top through an air distribution device, which causes the fiber filter element to be stretched upward. Since the fiber filter element is made of fiber material, after being stretched upward, the fiber filter element is in a loose state, and the pore size will expand. This allows the backwash water to pass through the expanded pore size to wash away the suspended solids trapped at different positions, preventing them from continuously adhering to the surface of the fiber filter element and affecting its subsequent filtration effect.

[0004] This device can achieve multi-stage deep filtration during use, and completes the flushing by expanding the filter element pore size through backwashing air and water linkage. However, it cannot achieve uniform aeration disturbance and has no secondary filtration structure. The backwashing efficiency is low and the effluent is prone to carrying small impurities. Therefore, a factory-prefabricated steel structure fiber filter is proposed, which can enhance the aeration backwashing effect and achieve secondary filtration, thereby improving water treatment efficiency and effluent quality. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a factory-prefabricated steel structure fiber filter.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a factory-prefabricated steel structure fiber filter tank, comprising a water collection box, an inlet installed on the outside of the water collection box, a water distributor connected to the output end of the inlet, a support frame fixed inside the water collection box, an adjusting rod rotatably connected inside the support frame, an upper filter element clamp threaded to the outside of the adjusting rod, a fiber filter element fixed at the bottom end of the upper filter element clamp, a lower filter element clamp fixed at the bottom end of the fiber filter element, an aeration mechanism fixed inside the water collection box, and a re-filtration mechanism installed inside the water collection box; The aeration mechanism includes a mounting frame, an air pump, and a corrugated conveying pipe. The mounting frame is internally fixedly connected to the water collection box, and the air pump is externally fixedly connected to the water collection box. The drive end of the air pump is connected to the corrugated conveying pipe.

[0007] Preferably, the water distributor has several sets of water outlets on its exterior, and several sets of adjusting rods are provided. The adjusting rods are arranged in an array. The water distributor with several sets of water outlets can evenly distribute sewage into the water collection box, so that the water flow can evenly contact each fiber filter element, avoid local filter element overload filtration, ensure the consistency of filtration effect, and at the same time make the filter element evenly stressed, thus extending the service life of the filter element.

[0008] Preferably, the fiber filter elements are arranged in several groups and distributed in an array. The lower filter element clamp and the water collection box are fixedly connected internally. The array of several groups of fiber filter elements can significantly increase the overall filtration area of ​​the device, make full use of the internal space of the water collection box, increase the wastewater treatment capacity per unit time, and at the same time allow the water flow to pass evenly through each filter element, avoiding excessive interception of pollutants in some filter elements and rapid clogging, thus ensuring the continuity and stability of the filtration operation.

[0009] Preferably, the output end of the corrugated conveying pipe is rotatably connected to a first aeration pipe, and the end of the corrugated conveying pipe away from the first aeration pipe is rotatably connected to a second aeration pipe. A first rack is fixed to the outside of the first aeration pipe, and a second rack is fixed to one end of the second aeration pipe. A first servo motor is fixed to the outside of the water collection box, a drive block is fixed to the drive end of the first servo motor, and a drive ring is fixed to the outside of the second rack. A transmission gear is rotatably connected to one end of the mounting bracket. The corrugated conveying pipe and the aeration pipe are rotatably connected, which can adapt to the movement and rotation of the aeration pipe, ensuring continuous and stable airflow delivery without pipe pulling damage. The first and second racks mesh with the transmission gear to realize the linkage and counter-movement of the two aeration pipes. With the transmission of the first servo motor, drive block and drive ring, the aeration pipes move synchronously back and forth, greatly expanding the aeration coverage area and eliminating aeration blind spots. The overall transmission structure realizes the automated movement of the aeration components without manual intervention, improving the uniformity and efficiency of backwashing. At the same time, the linkage structure only requires a single power source to drive, simplifying the device structure and reducing equipment operation and maintenance costs.

[0010] Preferably, the first and second aeration pipes are symmetrically distributed about the central axis of the corrugated conveying pipe. Five sets of aeration discs are installed at the top of the first aeration pipe, and the aeration discs are arranged in an array. The symmetrical distribution of the first and second aeration pipes about the central axis of the corrugated conveying pipe allows the aeration airflow to form a symmetrical and balanced disturbance area in the water collection box, covering both sides and the middle area of ​​the fiber filter element array, avoiding aeration blind spots, and ensuring that all fiber filter elements are subjected to uniform airflow impact.

[0011] Preferably, the first rack and the transmission gear are meshed together, and the second rack and the transmission gear are meshed together. The first rack and the second rack are respectively meshed with the transmission gear. The synchronous reverse linkage of the two racks can be achieved through a single set of transmission gears, which drives the first aeration pipe and the second aeration pipe to perform reciprocating motion in opposite directions, allowing the aeration range to expand synchronously to both sides, fully covering the fiber filter element array area in the water collection box, eliminating aeration blind spots. The meshing transmission structure has a precise transmission ratio and stable power transmission, avoiding jamming or deviation in the movement of the aeration pipe, and ensuring the uniformity of aeration disturbance.

[0012] Preferably, the inner wall of the drive ring is provided with a vertical groove for the drive block to slide. The drive block and the drive ring are slidably connected. The vertical groove on the inner wall of the drive ring and its slidable connection with the drive block can convert the rotational motion output by the first servo motor into the linear reciprocating motion of the drive ring, realizing a precise conversion of the power form and providing a stable driving force for the reciprocating movement of the aeration pipe. The vertical groove provides precise guidance for the sliding of the drive block, restricts its movement trajectory, avoids deviation and jamming during the driving process, and ensures the stability and smoothness of the transmission.

[0013] Preferably, the re-filtration mechanism includes a filter screen, an extension block, and a first return spring. The filter screen is slidably connected inside the water collection box. An extension block is fixed to the outside of the filter screen. A first return spring is fixed to the outside of the extension block. A second return spring is fixed to one end of the extension block. A drive rod is fixed to the outside of the filter screen. A second servo motor is fixed to the outside of the water collection box. An eccentric wheel is fixed to the drive end of the second servo motor.

[0014] Preferably, the filter screen has several sets of filter holes inside, the extension blocks are provided in four sets, the extension blocks are arranged in an array, and the first reset spring and the second reset spring are symmetrically distributed about the central axis of the extension blocks.

[0015] Preferably, the end of the first reset spring away from the extension block is fixedly connected to the water collection box, the end of the second reset spring away from the extension block is fixedly connected to the water collection box, and the drive rod is slidably connected to the water collection box.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the combination of a mounting frame, an air pump, and a corrugated conveying pipe, enables the device to achieve large-scale uniform disturbance during aeration backwashing. The mounting frame provides stable support for the aeration components, and the airflow generated by the air pump is delivered to the aeration pipeline through the corrugated conveying pipe, causing the aeration pipe to rotate and reciprocate synchronously, expanding the aeration coverage area, and ensuring that the area at the bottom of the fiber filter element where pollutants are trapped is fully disturbed, reducing backwashing energy consumption, and ultimately achieving the effect of enhancing the backwashing effect and preventing filter media from caking.

[0017] This invention enables the device to achieve dynamic secondary filtration during the backwashing stage by combining a filter screen, an extension block, and a first reset spring. The extension block provides installation support for the filter screen, and the first reset spring, in conjunction with the drive structure, drives the filter screen to slide back and forth, intercepting and filtering filter media debris and unwashed pollutants that fall off during the backwashing process, preventing them from mixing into the effluent, and ultimately improving the quality of the effluent and ensuring the effectiveness of wastewater treatment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall rear view structure of the present invention; Figure 3 This is a schematic diagram of the overall internal structure of the present invention; Figure 4 This is a schematic diagram of the structure of the first filter component of the present invention; Figure 5 This is a schematic diagram of the aeration mechanism of the present invention; Figure 6 For the present invention Figure 5Enlarged cross-sectional view of a portion of point A in the middle section; Figure 7 This is a schematic diagram of the re-filtration mechanism of the present invention; Figure 8 For the present invention Figure 7 Enlarged cross-sectional view of section B in the middle.

[0019] In the diagram: 1. Water collection box; 2. Water inlet; 3. Water distributor; 4. Support frame; 5. Adjusting rod; 6. Upper filter element clamp; 7. Fiber filter element; 8. Lower filter element clamp; 9. Aeration mechanism; 901. Mounting frame; 902. Air pump; 903. Corrugated conveying pipe; 904. First aeration pipe; 905. Second aeration pipe; 906. First rack; 907. Second rack; 908. First servo motor; 909. Drive block; 910. Drive ring; 911. Transmission gear; 10. Re-filtration mechanism; 1001. Filter screen; 1002. Extension block; 1003. First return spring; 1004. Second return spring; 1005. Drive rod; 1006. Second servo motor; 1007. Eccentric wheel. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 8 As shown, the present invention provides a factory-prefabricated steel structure fiber filter, including a water collection box 1, an inlet 2 installed on the outside of the water collection box 1, a water distributor 3 connected to the output end of the inlet 2, a support frame 4 fixed inside the water collection box 1, an adjusting rod 5 rotatably connected inside the support frame 4, an upper filter element clamp 6 threadedly connected to the outside of the adjusting rod 5, a fiber filter element 7 fixed at the bottom end of the upper filter element clamp 6, a lower filter element clamp 8 fixed at the bottom end of the fiber filter element 7, an aeration mechanism 9 fixed inside the water collection box 1, a re-filtration mechanism 10 installed inside the water collection box 1, several sets of outlets provided on the outside of the water distributor 3, several sets of adjusting rods 5 arranged in an array, several sets of fiber filter elements 7 arranged in an array, and the lower filter element clamp 8 fixedly connected to the inside of the water collection box 1.

[0022] The above scheme is adopted as follows: After the sewage is transported to the interior of the water distributor 3 through the inlet 2, the sewage is evenly distributed into the interior of the water collection box 1 through the water distributor 3, and the sewage is filtered through the fiber filter element 7. In the filtration state, after the water flows from top to bottom inside the water collection box 1, each fiber filter element 7 is immersed in the water flow and is in a compressed state, and the formed pore size gradually decreases along the water flow direction, forming a filter layer with gradually decreasing pore size from top to bottom, which filters out pollutants of different sizes in the water flow. In the backwashing state, the air pump 902 is started, and the mounting bracket 901 provides backwash gas from bottom to top, which causes each fiber filter element 7 to be stretched upward by force, so that its pore size expands, and the backwash water flows through it to wash away the pollutants filtered and intercepted.

[0023] like Figures 1 to 6 As shown, the aeration mechanism 9 includes a mounting frame 901, an air pump 902, and a corrugated conveying pipe 903. The mounting frame 901 is internally fixedly connected to the water collection box 1, and the air pump 902 is externally fixedly connected to the water collection box 1. The drive end of the air pump 902 is connected to the corrugated conveying pipe 903. A first aeration pipe 904 is rotatably connected to the output end of the corrugated conveying pipe 903. A second aeration pipe 905 is rotatably connected to the end of the corrugated conveying pipe 903 away from the first aeration pipe 904. A first rack 906 is fixed to the outside of the first aeration pipe 904, and a second rack 907 is fixed to one end of the second aeration pipe 905. A first servo motor 908 is fixed to the outside of the water collection box 1. A drive block 909 is fixed to the drive end of the first servo motor 908, and a drive ring 910 is fixed to the outside of the second rack 907. A transmission gear 911 is rotatably connected to one end of the mounting bracket 901. The first aeration pipe 904 and the second aeration pipe 905 are symmetrically distributed about the central axis of the corrugated conveying pipe 903. Five sets of aeration discs are installed at the top of the first aeration pipe 904, and the aeration discs are arranged in an array. The first rack 906 and the transmission gear 911 are meshed and connected. The second rack 907 and the transmission gear 911 are meshed and connected. The inner wall of the drive ring 910 is provided with a vertical groove for the drive block 909 to slide. The drive block 909 and the drive ring 910 are slidably connected.

[0024] The above scheme is adopted as follows: by starting the first servo motor 908 to drive the drive block 909 to rotate, the drive block 909 drives the drive ring 910 to reciprocate, and then the drive ring 910 drives the second rack 907 and the second aeration pipe 905 to move. When the second rack 907 moves, it drives the transmission gear 911 to rotate. Then, the rotation of the transmission gear 911 drives the first rack 906 and the first aeration pipe 904 to move, thereby realizing the opposing movement of the first aeration pipe 904 and the second aeration pipe 905, thereby increasing the aeration range of the first aeration pipe 904 and the second aeration pipe 905, and thus improving the backwashing efficiency.

[0025] like Figures 1 to 8As shown, the re-filtration mechanism 10 includes a filter screen 1001, an extension block 1002, and a first return spring 1003. The filter screen 1001 is slidably connected inside the water collection box 1. The extension block 1002 is fixed to the outside of the filter screen 1001, and the first return spring 1003 is fixed to the outside of the extension block 1002. A second return spring 1004 is fixed to one end of the extension block 1002. A drive rod 1005 is fixed to the outside of the filter screen 1001, and a second servo motor 1006 is fixed to the outside of the water collection box 1. The second servo motor 1006 drives... An eccentric wheel 1007 is fixed to the moving end. Several sets of filter holes are opened inside the filter screen 1001. Four sets of extension blocks 1002 are provided. The extension blocks 1002 are arranged in an array. The first reset spring 1003 and the second reset spring 1004 are symmetrically distributed about the central axis of the extension blocks 1002. The end of the first reset spring 1003 away from the extension block 1002 is fixedly connected to the water collection box 1. The end of the second reset spring 1004 away from the extension block 1002 is fixedly connected to the water collection box 1. The drive rod 1005 is slidably connected to the water collection box 1.

[0026] The above solution is adopted as follows: by starting the second servo motor 1006 to drive the eccentric wheel 1007 to rotate, the eccentric wheel 1007 squeezes the drive rod 1005 when it rotates, thereby driving the filter screen 1001 to move. After the eccentric wheel 1007 disengages from the drive rod 1005, the filter screen 1001 is reset by the extension block 1002 and the second reset spring 1004, thereby enabling the filter screen 1001 to move. The moving filter screen 1001 then filters the filter media debris or pollutants that have not been flushed away from the equipment during the backwashing process, thereby improving the effect of filtered water.

[0027] The working principle and usage process of this invention are as follows: First, complete the installation and debugging of the device, confirm that the connections of all components of the water collection box 1 are sealed without leakage, the water inlet 2 and the water distributor 3 are smoothly connected, the array-distributed adjusting rods 5 rotate flexibly, the upper filter element clamp 6 and the lower filter element clamp 8 hold the fiber filter element 7 firmly, the pipeline connection of the aeration mechanism 9 is leak-free, the air outlet of the aeration disc is normal, the filter screen 1001 of the re-filtration mechanism 10 slides without jamming, the return spring has good elasticity, and all servo motors and drive components operate normally, ensuring that the device has the conditions for wastewater treatment operation.

[0028] During the filtration stage, the wastewater to be treated is connected to inlet 2. The wastewater is then transported to the water distributor 3 through inlet 2. Through several sets of outlets outside the water distributor 3, the wastewater is evenly distributed into the collection box 1. The wastewater flows from top to bottom in the collection box 1. The arrayed fiber filter elements 7 are immersed in the water flow and are in a state of natural compression. The filtration pore size formed gradually decreases along the water flow direction, forming a multi-level gradient filtration layer. This layer intercepts and filters pollutants of different particle sizes in the water flow step by step, completing the preliminary wastewater filtration treatment. The filtered water flows into the collection box 1, achieving compliant effluent. If it is necessary to adjust the filtration precision according to the wastewater quality, the adjusting rod 5 can be rotated to drive the upper filter element clamp 6 to move up and down through the threaded transmission, adjusting the stretching degree of the fiber filter element 7 and changing its filtration pore size to adapt to different wastewater treatment needs.

[0029] During the backwashing operation, the air pump 902 is started, and the airflow is delivered to the first aeration pipe 904 and the second aeration pipe 905 through the corrugated conveying pipe 903, and sprayed upward through the aeration disc to form a backwash airflow from bottom to top. This causes the fiber filter element 7 to be stretched upward by force, and the filter pore size to expand, loosening the pollutants trapped on the surface and inside of the filter element. At the same time, the first servo motor 908 is started, driving the drive block 909 to rotate. The drive block 909 slides along the vertical groove on the inner wall of the drive ring 910, driving the drive ring 910 to reciprocate. The linear movement of the drive ring 910 causes the second rack 907 and the second aeration pipe 905 to move synchronously. When the second rack 907 moves, it meshes with the transmission gear 911 to rotate. The transmission gear 911 then meshes with the first rack 906 and the first aeration pipe 904 to move in opposite directions, realizing the synchronous reciprocating motion of the first aeration pipe 904 and the second aeration pipe 905, expanding the aeration coverage area, and making the backwash airflow evenly disturb the fiber filter element 7 area in the water collection box 1, fully removing pollutants and improving the backwashing efficiency.

[0030] During the backwashing process, the second servo motor 1006 is started simultaneously, driving the eccentric wheel 1007 to rotate continuously. When the eccentric wheel 1007 rotates to the preset position, it squeezes the drive rod 1005, causing the drive rod 1005 to slide along the water collection box 1, thereby pushing the filter screen 1001 to move synchronously. At this time, the first reset spring 1003 and the second reset spring 1004 are stretched and produce elastic deformation. When the eccentric wheel 1007 rotates and disengages from the drive rod 1005, the reset spring releases its elastic potential energy, causing the extension block 1002 and the filter screen 1001 to quickly reset. This process is repeated to achieve the reciprocating sliding of the filter screen 1001. The sliding filter screen 1001, through its internal filter holes, performs secondary interception and filtration of filter media debris and pollutants that have not been flushed away during the backwashing process, preventing them from mixing into the effluent and ensuring the quality of the effluent.

[0031] After the backwashing operation is completed, first turn off the first servo motor 908 and the second servo motor 1006. The aeration mechanism 9 and the re-filtration mechanism 10 return to their initial state. Continue to run the air pump 902 for the preset time to flush away the pollutants and filter media debris in the water collection box 1. Then turn off the air pump 902, and the device can enter the filtration operation stage again. Regularly check the integrity of the fiber filter element 7, the unobstructedness of the aeration disc, and the cleanliness of the filter screen 1001, and replace and clean them in a timely manner.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A factory-prefabricated steel structure fiber filter tank, comprising a water collection box (1), characterized in that: The water collection box (1) is equipped with an inlet (2) on its exterior. The output end of the inlet (2) is connected to a water distributor (3). The water collection box (1) is fixed with a support frame (4). The support frame (4) is rotatably connected with an adjusting rod (5). The adjusting rod (5) is threadedly connected with an upper filter element clamp (6). The bottom end of the upper filter element clamp (6) is fixed with a fiber filter element (7). The bottom end of the fiber filter element (7) is fixed with a lower filter element clamp (8). The water collection box (1) is fixed with an aeration mechanism (9). The water collection box (1) is equipped with a re-filtration mechanism (10). The aeration mechanism (9) includes a mounting frame (901), an air pump (902) and a corrugated conveying pipe (903). The mounting frame (901) is internally fixedly connected to the water collection box (1), and the air pump (902) is externally fixedly connected to the water collection box (1). The drive end of the air pump (902) is connected to the corrugated conveying pipe (903).

2. The factory-prefabricated steel structure fiber filter tank according to claim 1, characterized in that: The water distributor (3) has several sets of water outlets on its exterior, and the regulating rods (5) are arranged in several sets in an array.

3. The factory-prefabricated steel structure fiber filter tank according to claim 1, characterized in that: The fiber filter element (7) is provided in several groups, and the fiber filter element (7) is arranged in an array. The lower filter element clamp (8) and the water collection box (1) are internally fixedly connected.

4. The factory-prefabricated steel structure fiber filter tank according to claim 1, characterized in that: The output end of the corrugated conveying pipe (903) is rotatably connected to the first aeration pipe (904), and the end of the corrugated conveying pipe (903) away from the first aeration pipe (904) is rotatably connected to the second aeration pipe (905). The first aeration pipe (904) is fixed to the outside of the first aeration pipe (906), and the second aeration pipe (905) is fixed to one end of the second aeration pipe (905). The water collection box (1) is fixed to the outside of the first servo motor (908), and the drive end of the first servo motor (908) is fixed to the drive block (909). The second rack (907) is fixed to the outside of the drive ring (910), and the mounting bracket (901) is rotatably connected to one end of the transmission gear (911).

5. The factory-prefabricated steel structure fiber filter tank according to claim 4, characterized in that: The first aeration pipe (904) and the second aeration pipe (905) are symmetrically distributed about the central axis of the corrugated conveying pipe (903). Five sets of aeration discs are installed at the top of the first aeration pipe (904), and the aeration discs are arranged in an array.

6. The factory-prefabricated steel structure fiber filter tank according to claim 4, characterized in that: The first rack (906) is meshed with the transmission gear (911), and the second rack (907) is meshed with the transmission gear (911).

7. The factory-prefabricated steel structure fiber filter tank according to claim 4, characterized in that: The inner wall of the drive ring (910) is provided with a vertical groove for the drive block (909) to slide, and the drive block (909) and the drive ring (910) are slidably connected.

8. The factory-prefabricated steel structure fiber filter tank according to claim 1, characterized in that: The re-filtration mechanism (10) includes a filter screen (1001), an extension block (1002), and a first return spring (1003). The filter screen (1001) is slidably connected inside the water collection box (1). An extension block (1002) is fixed to the outside of the filter screen (1001). A first return spring (1003) is fixed to the outside of the extension block (1002). A second return spring (1004) is fixed to one end of the extension block (1002). A drive rod (1005) is fixed to the outside of the filter screen (1001). A second servo motor (1006) is fixed to the outside of the water collection box (1). An eccentric wheel (1007) is fixed to the drive end of the second servo motor (1006).

9. The factory-prefabricated steel structure fiber filter tank according to claim 8, characterized in that: The filter screen (1001) has several sets of filter holes inside, and the extension block (1002) has four sets. The extension blocks (1002) are arranged in an array. The first reset spring (1003) and the second reset spring (1004) are symmetrically distributed about the central axis of the extension block (1002).

10. The factory-prefabricated steel structure fiber filter according to claim 8, characterized in that: The first reset spring (1003) is fixedly connected to the water collection box (1) at the end away from the extension block (1002), the second reset spring (1004) is fixedly connected to the water collection box (1) at the end away from the extension block (1002), and the drive rod (1005) is slidably connected to the water collection box (1).

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