A water pollution treatment device using a fibrous membrane material

Abstract

The application discloses a kind of water pollution treatment device for fiber membrane production, it is related to water pollution treatment technical field, including: sewage pool, overhead cabin is fixedly arranged in it, rectangular cabin hole is opened in the center of overhead cabin, a plurality of RO membrane filter groups that are linear array and are close to the distribution of orifice section are fixedly installed in rectangular cabin hole;Aeration coil network is erected in the upper of RO membrane filter group, and aeration direction is upward;A plurality of water pumps are distributed around the port section of sewage pool, the nozzle of water inlet pipe of water pump is distributed at the half of the vertical height of sewage pool, and water outlet pipe is located at the bottom of rectangular cabin hole.The invention increases the design of accumulation below RO membrane filter group, uses structure to guide water flow, and forms accumulation by confluence, resistance flow and the like formed by structure design, so as to reduce the content of particulate matter in liquid passing through RO membrane filter group, to achieve the purpose of extending RO membrane filter group flushing time interval.

Description

Technical Field

[0001] This invention relates to the field of water pollution treatment technology, and specifically to a water pollution treatment device for the production of fiber membrane materials. Background Technology

[0002] Wastewater generated after the production of fiber membrane materials needs to undergo pretreatment (pH adjustment and removal of pollutants that can float on the water surface) – flocculation treatment – ​​biological treatment (such as activated sludge process) – ultrafiltration (UF) or reverse osmosis (RO) – treatment of special pollutants and sludge treatment. Refer to Chinese patent publication CN104815565A, which discloses a method for preparing a cellulose composite membrane for adsorbing heavy metal ions.

[0003] In existing technologies, including the aforementioned patents, ultrafiltration (UF) or reverse osmosis (RO) filters tiny, water-insoluble particles from the liquid. Under aeration by the aeration discs, the liquid flows upwards, and during this flow, the particles come into contact with and are adsorbed by the ultrafiltration (UF) or reverse osmosis (RO). After a period of time, a large amount of particles will float on the ultrafiltration (UF) or reverse osmosis (RO), requiring flushing; otherwise, the subsequent wastewater treatment effect will be affected. Therefore, in daily use, ultrafiltration (UF) or reverse osmosis (RO) requires periodic aeration. Therefore, it is hoped that a good solution can be found to increase the sedimentation effect in the water circulation formed by aeration, thereby minimizing the particle content of the liquid passing through ultrafiltration (UF) or reverse osmosis (RO), and to a certain extent, extending the flushing interval of ultrafiltration (UF) or reverse osmosis (RO). Summary of the Invention

[0004] The purpose of this invention is to provide a water pollution treatment device for the production of fiber membrane materials, which solves the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a water pollution treatment device for fiber membrane material production, comprising:

[0006] A wastewater tank has an elevated chamber fixedly installed inside it. A rectangular opening is provided in the center of the elevated chamber. Multiple RO membrane filter groups arranged in a linear array and distributed close to the opening section are fixedly installed inside the rectangular opening.

[0007] The aeration coil network is installed above the RO membrane filter assembly, with the aeration direction upward;

[0008] Multiple water pumps are distributed around the cross-section of the sewage tank port. The inlet of the water pump is located at half the vertical height of the sewage tank, while the outlet is located at the bottom of the rectangular compartment.

[0009] The arc-shaped dome is fixedly installed in the rectangular cabin hole, and the rectangular cabin hole is divided into a first space and a second space through the arc-shaped dome.

[0010] The first space and the second space are communicated through a through hole opened at the top of the arc-shaped dome.

[0011] As preferred, the RO membrane filtering group comprises a rectangular frame and RO membrane pieces, and the RO membrane pieces are arranged in an array inside the rectangular frame.

[0012] The RO membrane piece comprises an upper disc body and a lower disc body, and a plurality of RO membrane bodies are fixedly installed between the upper disc body and the lower disc body.

[0013] As preferred, the RO membrane body is composed of a plurality of ring layers, and each ring layer is composed of a plurality of circumferentially arranged RO membrane rods.

[0014] The RO membrane rod comprises a spiral rod piece and a plurality of RO membrane bands surrounding the spiral rod piece, and the RO membrane bands surrounding the spiral rod piece are arranged loosely.

[0015] A circular hole is opened in the lower disc body, and the circular hole is communicated with the inside of the innermost ring layer.

[0016] As preferred, the spiral directions of the spiral rod pieces in the adjacent two ring layers are opposite, and a predetermined spacing is maintained between each adjacent ring layer.

[0017] As preferred, the number of RO membrane rods in each ring layer decreases by a factor from the outermost layer to the innermost layer.

[0018] As preferred, an arc-shaped guide piece is arranged at the inner side bottom of the first space, and the arc-shaped guide piece is used for guiding water outlet of the water outlet pipe to the inner wall of the arc-shaped dome.

[0019] An arc-shaped guide cover is fixedly installed on the inner wall of the arc-shaped dome, and the inner wall extension line of the arc-shaped guide cover is coaxial with the outer wall extension line of the arc-shaped guide piece towards the first space.

[0020] The arc-shaped guide piece and the bottom of the first space form a reflow containing interval with a concave arc angle structure.

[0021] As preferred, a plurality of circular ring protrusions are fixedly installed at the bottom of the first space, and the heights of the three circular ring protrusions increase towards the center.

[0022] The end of the arc-shaped guide cover is at the same vertical level as the arc top of one of the circular ring protrusions, and the spacing between them forms a gap flow channel.

[0023] Preferably, the circular convex portion is centered on the arc top, with one side being an arc slope and the other side being a rounded slope.

[0024] The arc surface of the circular arc-shaped guide cover is tangent to the arc slope.

[0025] Preferably, the top of the arc-shaped dome is fixedly provided with an overflow groove, the bottom of the first space is fixedly provided with a column, the column extends into the second space, and the end of the column is fixedly provided with a circular table portion.

[0026] The inner side of the overflow groove is a circular table groove, the circular table groove has a narrow opening and a wide opening, and the narrow opening is in communication with the through hole.

[0027] The circular table portion is located in the circular table groove, and a predetermined gap is maintained between the circular table portion and the circular table groove to form an overflow groove.

[0028] Preferably, the bottom of the sewage pool is further provided with a sewage pipe network, the sewage pipe network includes a plurality of drainage pipes, and the drainage pipes are respectively located in the backflow containing area and are in communication with the rounded slope close to the circular convex portion.

[0029] In the above technical solution, the water pollution treatment device for fiber membrane production provided by the present application has the following beneficial effects: after the water pump is started, the liquid in the middle of the sewage pool is sucked up and then stably discharged into the rectangular cabin hole. The liquid is collected below the arc-shaped dome, and a vortex is formed. The unique accumulation effect of the vortex causes the particles in the liquid to gradually deposit in the first space. The liquid that overflows through the through hole is then upwardly surged under the airflow generated by the aeration coil network and is subjected to secondary fine filtration through the RO membrane filter group. In this process, the RO membrane filter group is newly provided with a flow collecting link of the arc-shaped dome. The liquid is sucked into the first space separated by the arc-shaped dome, and the strong discharge force of the outlet pipe causes the liquid to form a vortex in the first space. The content of particles in the liquid entering the RO membrane filter group is effectively reduced, thereby prolonging the flushing interval of the RO membrane filter group. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0031] Figure 1 The overall structural schematic diagram provided by the embodiments of the present application;

[0032] Figure 2 The RO membrane filter group and the overhead cabin structural schematic diagram provided by the embodiments of the present application;

[0033] Figure 3 The schematic diagram of the explosion structure of the RO membrane filter group provided by the embodiment of the present application is shown in Figure 6. Figure 2

[0034] Figure 4 The schematic diagram of the explosion structure of the RO membrane filter group provided by the embodiment of the present application is shown in Figure 6.

[0035] Figure 5 The schematic diagram of the cross-sectional structure of the RO membrane provided by the embodiment of the present application is shown in Figure 7.

[0036] Figure 6 The schematic diagram of the cross-sectional structure of the RO membrane provided by the embodiment of the present application is shown in Figure 7.

[0037] Figure 7 The schematic diagram of the plane structure of the water pollution treatment device for the fiber membrane production provided by the embodiment of the present application is shown in Figure 8.

[0038] Figure 8 The schematic diagram of the related structure of the arc-shaped dome provided by the embodiment of the present application is shown in Figure 9.

[0039] Figure 9 The schematic diagram of the partial structure of the water pollution treatment device for the fiber membrane production provided by the embodiment of the present application is shown in Figure 10. Figure 8

[0040] Figure 10 The schematic diagram of the arc-shaped dome and the rectangular cabin hole side wall forming the circulation structure provided by the embodiment of the present application is shown in Figure 11.

[0041] Explanation of the reference signs:

[0042] 1, sewage pool; 2, overhead cabin; 21, rectangular cabin hole; 3, RO membrane filter group; 31, rectangular frame; 321, upper disc body; 322, lower disc body; 323, RO membrane body; 4, aeration disc pipe network; 5, water pump; 6, arc-shaped dome; 61, through hole; 62, circular arc-shaped guide cover; 63, overflow groove; 64, circular truncated cone part; 65, arc-shaped guide; 7, circular ring protruding part; 100, backflow containing interval; 200, gap flow channel; 300, overflow groove channel; 400, slow flow area. DETAILED DESCRIPTION

[0043] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0044] As shown in Figure 10, a water pollution treatment device for fiber membrane production includes: Figure 1

[0045] The sewage pool 1 is fixedly provided with the overhead cabin 2, the overhead cabin 2 is provided with the rectangular cabin hole 21 in the center, and the rectangular cabin hole 21 is fixedly installed with a plurality of RO membrane filter groups 3 arranged in a linear array and distributed close to the orifice cross section.​​​

[0046] The aeration coil network 4 is installed above the RO membrane filter group 3, and the aeration direction is upward;

[0047] Multiple water pumps 5 are distributed around the cross-section of the port of the sewage tank 1. The inlet of the water pump 5 is located at half the vertical height of the sewage tank 1, while the outlet is located at the bottom of the rectangular chamber 21.

[0048] An arc-shaped dome 6 is fixedly installed inside the rectangular hatch 21, and the arc-shaped dome 6 divides the rectangular hatch 21 into a first space and a second space.

[0049] The first space and the second space are connected by a through hole 61 opened at the top of the arched dome 6.

[0050] Specifically, in the above embodiment, the sewage tank 1 is made of poured concrete, while the elevated cabin 2 is constructed at the bottom of the sewage tank 1 by stacking bricks, and the water pumps 5 are fixed to the ground and distributed close to the sewage tank 1, with a minimum of two pumps. Figure 7 As shown, the inlet pipe of the water pump 5 is located in the middle of the sewage tank 1, while the outlet pipe of the water pump 5 extends down along the inner wall of the sewage tank 1, passes through the overhead compartment 2, and then the outlet of the pipe is flush with the bottom of the sewage tank 1. The aforementioned pipes can be made of corrosion-resistant plastic materials, such as PVC pipes or other rigid pipes.

[0051] Furthermore, the arc-shaped dome 6 in the above embodiments can be a corrosion-resistant rigid composite plastic part, a stainless steel plate part, or a component integrally molded from concrete. Its cross-section is arc-shaped.

[0052] Furthermore, in the above embodiment, the arc-shaped dome 6 is distributed near the bottom of the sewage tank 1; in short, the edge of the arc-shaped dome 6 is flush with the upper edge of the outlet pipe. Therefore, in the first space and the second space, the volume of the first space is smaller than the volume of the second space.

[0053] Furthermore, the pipes of the multiple water outlets in the above embodiments are arranged in an inclined direction so that the strong discharge force of the water outlet pipes causes the liquid to form a vortex in the first space.

[0054] In the above-mentioned technology, the liquid in the middle of the sewage pool 1 is sucked up by the water pump 5 and then stably discharged into the rectangular cabin hole 21. The liquid is collected under the arc-shaped dome 6, and a vortex is formed. The unique accumulation effect of the vortex causes the particles in the liquid to gradually deposit in the first space. The liquid overflowing through the through hole 61 is upwelled by the air flow generated by the aeration coil network 4 and then subjected to secondary fine filtration by the RO membrane filtration group 3. In this process, the arc-shaped dome 6 is newly added before the RO membrane filtration group 3. The liquid is sucked into the first space separated by the arc-shaped dome 6, and the strong discharge force of the outlet pipe causes the liquid to form a vortex in the first space. The content of particles in the liquid entering the RO membrane filtration group 3 is effectively reduced, thereby prolonging the flushing interval of the RO membrane filtration group 3.

[0055] As a further provided embodiment of the present application, the RO membrane filtration group 3 comprises a rectangular frame 31 and RO membrane pieces, and the RO membrane pieces are arranged in an array inside the rectangular frame 31.

[0056] The RO membrane piece comprises an upper disc body 321 and a lower disc body 322, and a plurality of RO membrane bodies 323 are fixedly installed between the upper disc body 321 and the lower disc body 322.

[0057] Specifically, the RO membrane body 323 in the above-mentioned embodiment is in the shape of a strip, a bar, or a willow catkin, and the number thereof is several. The RO membrane body 323 is densely arranged between the upper disc body 321 and the lower disc body 322, and the upper disc body 321 and the lower disc body 322 are fixed by welding or screwing to the rectangular frame 31. Figure 3 And Figure 4 It can be known that the aeration coil network 4 in the embodiment comprises parallel pipelines and a plurality of aeration discs fixedly connected to the parallel pipelines. The aeration direction of the aeration disc is upward, thereby producing a suction effect to suck the liquid from the lower direction to the upper direction, and then the liquid is circulated into the first space again by the water pump 5.

[0058] As a further provided embodiment of the present application, the RO membrane body 323 is composed of a plurality of ring layers, and each ring layer is composed of a plurality of circumferentially arranged RO membrane rods. The RO membrane rod comprises a spiral rod and a plurality of RO membrane bands surrounding the spiral rod. The plurality of RO membrane bands surrounding the spiral rod are loosely arranged. A circular hole is formed in the lower disc body 322, and the circular hole is in communication with the inside of the innermost ring layer.

[0059] Specifically, in the embodiment, a corrosion-resistant plastic plate fixed by a screw is installed on the rectangular frame 31, and the lower disc body 322 is embedded in the corrosion-resistant plastic plate, so that the upward flowing liquid only enters the inside of the RO membrane piece through the circular hole. The RO membrane body 323 is composed of a plurality of ring layers, and each RO membrane rod constituting the ring layer is composed of a spiral rod and a plurality of RO membrane bands surrounding the spiral rod.Figure 6 It can be seen that this kind of surrounding belongs to loose surrounding, not close surrounding, and the purpose is that when the liquid flows through the RO membrane element towards the aeration coil net 4, the liquid will fully contact the RO membrane element, so that the RO membrane element adsorbs the particles in the liquid.

[0060] As a further provided optimal embodiment of the present application, in combination with Figure 5 As shown, the spiral directions of the spiral rods in two adjacent ring layers are opposite, and a predetermined spacing is maintained between each adjacent ring layer. By using the spiral directions of the RO membrane rod groups in multiple ring layers, a dense mesh structure is formed, thereby increasing the effect of intercepting particles in the liquid layer by layer.

[0061] It should be noted that the number of RO membrane rods in each ring layer decreases by a factor from the outermost layer to the innermost layer. The factor can be a factor of 1:2, that is, the number of RO membrane rods in the innermost ring layer is the least, and the number of RO membrane rods in the outermost ring layer is the most. The purpose is to use diffusion type filtration, that is, the innermost RO membrane rod first filters the particles in the liquid, and then the second level ring layer, the third ring layer,..., the outermost ring layer, in turn, performs adsorption, multi-stage adsorption, and maximizes the RO membrane adsorption effect. Secondly, the innermost RO membrane rod is adsorbed first, and when it is full, it will not hinder the flow of the second level ring layer liquid, and the second level ring layer at this time performs adsorption as the innermost ring layer, and so on, thereby maximizing the use time of the RO membrane.

[0062] Secondly, the use of this diffusion type filtration can play a blocking role, because as the RO membrane adsorbs, the fluctuation of the liquid flow will also drive a certain amount of particles originally floating on the RO membrane to leave.

[0063] As a further provided another embodiment of the present application, in combination with Figure 7 As shown, the inner bottom of the first space is provided with an arc-shaped guide 65, which is used to guide the water outlet of the water outlet pipe to the inner wall of the arc-shaped dome 6;

[0064] The inner wall of the arc-shaped dome 6 is fixedly installed with a circular arc-shaped guide cover 62, and the extension line of the inner wall of the circular arc-shaped guide cover 62 is coaxial with the extension line of the outer wall of the arc-shaped guide 65 towards the first space side;

[0065] The arc-shaped guide 65 and the bottom of the first space form a concave circular arc angle structure backflow containing interval 100.

[0066] Specifically, in this embodiment, when the liquid is pumped to the bottom of the sewage tank 1, the liquid flows along the arc surface of the arc-shaped guide 65, thus contacting the inner wall of the circular arc-shaped guide cover 62. Due to the strong water flow force, the liquid flows along the inner wall of the circular arc-shaped guide cover 62 to the outlet of the circular arc-shaped guide cover 62. Then, it is guided along the inner side wall of the circular arc-shaped guide cover 62 to change the liquid flow path and guide it to the side where the arc-shaped guide 65 is located. At this time, the liquid flow direction is along the arc-shaped guide 65 towards the outer wall of the first space, thereby driving the internal liquid to form a circulation, combined with Figure 9 As shown.

[0067] When the liquid flows to the reflux containment zone 100, it will form a reflux, that is, the liquid flows along the bottom of the sewage tank 1 towards the axis, that is, a small area of ​​reflux is formed here, thus forming accumulation again, thereby causing the first wave of liquid particles to accumulate.

[0068] As another embodiment of the present invention, combined with Figure 8 As shown, at least three annular protrusions 7 are fixedly installed at the bottom of the first space. The height of the three annular protrusions 7 increases as they approach the center. The end of the circular arc guide cover 62 and the arc apex of one of the annular protrusions 7 are on the same vertical horizontal plane, and the distance between them forms a gap flow channel 200.

[0069] Secondly, the annular protrusion 7 has an arc-shaped slope on one side and a rounded slope on the other side, with the arc surface of the circular arc-shaped guide cover 62 being tangent to the arc-shaped slope.

[0070] Specifically, in combination Figure 9 As shown, in this embodiment, the vertical height of the annular protrusion 7 increases from the side near the arc-shaped guide 65 to the side near the circular arc-shaped guide cover 62. Because the liquid, after being guided by the arc-shaped guide 65 towards the outer wall of the first space, flows along the bottom of the sewage tank 1 towards the axis, it will also move up the arc-shaped slope and over the annular protrusion 7. At this point, the liquid flow velocity at the rounded corner slope will be lower than the flow velocity of the liquid guided by the arc-shaped slope, forming a small backflow at the rounded corner slope, thus creating an accumulation effect and forming a second wave of accumulation.

[0071] Furthermore, the multiple annular protrusions 7 in the design can also serve as flow obstruction, that is, raising the liquid flowing along the bottom of the sewage tank 1 towards the axis, thereby reducing the flow velocity, which is more conducive to the accumulation effect of the small backflow. Moreover, the higher the vertical height of the annular protrusions 7, the better the accumulation effect of the small backflow is achieved in conjunction with the flow obstruction and leakage force of the previous or multiple annular protrusions 7.

[0072] Further, the liquid in the above-mentioned embodiments forms a circulation as shown in Figure 9 The gap flow channel 200 is equal in vertical height to the circular ring protrusion 7 arranged at the innermost circle, and the distance from the bottom of the sewage pool 1, so that the particulate content of the liquid entering the cavity formed by the circular arc guide cover 62 and the circular ring protrusion 7 arranged at the innermost circle through the gap flow channel 200 is greatly reduced, and the flow rate into the cavity is reduced at this time, and the liquid inside tends to be calm.

[0073] As a further provided embodiment of the present application, in combination with Figure 8 As shown in the drawings, the top of the arc-shaped dome 6 is fixedly installed with an overflow groove 63, and the bottom of the first space is fixedly installed with a column, which extends into the second space and is fixedly provided at the end with a circular table portion 64;

[0074] The inner side of the overflow groove 63 is a circular table groove, which has a narrow opening and a wide opening, and the narrow opening is in communication with the through hole 61.

[0075] The circular table portion 64 is located in the circular table groove, and the two maintain a predetermined gap to form an overflow groove 300.

[0076] Specifically, in combination with Figure 10 As shown in the drawings, the liquid in the cavity will flow upward under the impetus of the aeration coil network 4, enter the second space through the overflow groove 300. The liquid that rushes in flows along the overflow groove 300 towards, thereby colliding with the inner wall of the RO membrane filter group 3 and the rectangular cabin hole 21 to form a circulating flow, i.e., the slow flow area 400 shown in Figure 8 As shown in the drawings, the liquid in the cavity will flow upward under the impetus of the aeration coil network 4, enter the second space through the overflow groove 300. The liquid that rushes in flows along the overflow groove 300 towards, thereby colliding with the inner wall of the RO membrane filter group 3 and the rectangular cabin hole 21 to form a circulating flow, i.e., the slow flow area 400 shown in

[0077] It should be noted that the aeration coil network 4 in the above-mentioned embodiments is distributed against the RO membrane filter group 3.

[0078] As a further provided embodiment of the present application, in combination with Figure 8 As shown in the drawings, the bottom of the sewage pool 1 is also paved with a sewage pipe network, which includes a plurality of drainage pipes, and the drainage pipes are respectively located in the backflow containing area 100 and the circular corner slope surface close to the circular ring protrusion 7.

[0079] Specifically, the embodiment further includes a sewage pump, and the input end of the sewage pump is in communication with the sewage pipe network, so as to periodically drive the sewage pump to suck and discharge the accumulated dirt in the backflow containing area 100 and the circular corner slope surface area close to the circular ring protrusion 7 for treatment, so as to ensure that the sludge content at the bottom of the sewage pool 1 is at a relatively low level, thereby ensuring the complete formation of each circulating flow and backflow.

[0080] It should be noted that the sewage pump operation can be performed during normal sewage treatment of the sewage tank 1, or can be performed by repeatedly flushing the sewage tank 1 by pumping cleaning water into the bottom of the sewage tank 1 when the sewage tank 1 is stopped.

[0081] The above merely illustrates some exemplary embodiments of the present application, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and description are illustrative in nature, and should not be construed as limiting the scope of the claims of the present application.

Claims

1. A water pollution treatment device for the production of fiber membrane materials, characterized in that, include: The sewage tank (1) has an overhead chamber (2) fixedly installed inside it. The overhead chamber (2) has a rectangular chamber hole (21) in the center. Multiple RO membrane filter groups (3) are fixedly installed in the rectangular chamber hole (21) in a linear array and distributed close to the cross section of the hole. The aeration coil network (4) is installed above the RO membrane filter group (3) and the aeration direction is upward; Multiple water pumps (5) are distributed around the port cross section of the sewage tank (1). The inlet of the water pump (5) is located at half the vertical height of the sewage tank (1), while the outlet is located at the bottom of the rectangular chamber (21). An arc-shaped dome (6) is fixedly installed inside the rectangular hatch (21), and the arc-shaped dome (6) divides the rectangular hatch (21) into a first space and a second space. The first space and the second space are connected by a through hole (61) at the top of the arc-shaped dome (6); The RO membrane filter assembly (3) includes a rectangular frame (31) and RO membrane elements, wherein the RO membrane elements are arranged in an array inside the rectangular frame (31); The RO membrane assembly includes an upper disc (321) and a lower disc (322), and multiple RO membranes (323) are fixedly installed between the upper disc (321) and the lower disc (322). The RO membrane (323) is composed of multiple ring layers, and each ring layer is composed of multiple RO membrane rods arranged in a circular array. The RO membrane rod includes a spiral rod and multiple strands of RO membrane tape wrapped around the spiral rod, and the multiple strands of RO membrane tape wrapped around the spiral rod are loosely arranged; The lower plate (322) has a circular hole, which communicates with the innermost ring layer. The spiral rods in two adjacent ring layers have opposite spiral directions, and a predetermined distance is maintained between each adjacent ring layer.

2. The water pollution treatment device for fiber membrane material production according to claim 1, characterized in that, The number of RO membrane rods in each of the ring layers decreases in multiples from the outermost layer to the innermost layer.

3. The water pollution treatment device for fiber membrane material production according to claim 1, characterized in that, An arc-shaped guide (65) is provided at the bottom of the inner side of the first space. The arc-shaped guide (65) is used to guide the water outlet pipe to the inner wall of the arc-shaped dome (6). A circular arc-shaped guide cover (62) is fixedly installed on the inner wall of the arc-shaped dome (6). The extension line of the inner wall of the circular arc-shaped guide cover (62) is coaxial with the extension line of the outer wall of the arc-shaped guide (65) facing the first space. The arc-shaped guide (65) forms a recirculation receiving area (100) with the bottom of the first space, which has a concave rounded corner structure.

4. The water pollution treatment device for fiber membrane material production according to claim 3, characterized in that, The bottom of the first space is fixedly equipped with no less than three annular protrusions (7), and the height of the three annular protrusions (7) increases as they approach the center. The end of the circular arc guide cover (62) and the arc apex of one of the circular protrusions (7) are on the same vertical horizontal plane, and the distance between them forms a gap flow channel (200).

5. A water pollution treatment device for fiber membrane material production according to claim 4, characterized in that, The annular protrusion (7) has an arc-shaped slope on one side and a rounded slope on the other side, with the arc apex as the center. The arc surface of the circular arc guide cover (62) is tangent to the arc slope surface.

6. A water pollution treatment device for fiber membrane material production according to claim 3, characterized in that, An overflow trough (63) is fixedly installed on the top of the arc-shaped dome (6), a column is fixedly installed at the bottom of the first space, the column extends into the second space, and a frustum (64) is fixedly provided at its end. The inner side of the overflow groove (63) is a frustum groove, which has a narrow opening and a wide opening, and the narrow opening is connected to the through hole (61). The frustum portion (64) is located within the frustum groove, and the two maintain a predetermined gap to form an overflow channel (300).

7. A water pollution treatment device for fiber membrane material production according to claim 1, characterized in that, The bottom of the sewage tank (1) is also provided with a sewage pipe network, which includes multiple drainage pipes. The drainage pipes are connected to the return flow containment area (100) and the rounded slope near the annular protrusion (7).

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