Tubular wastewater purification device and wastewater purification system

Abstract

The present invention discloses a tubular wastewater purification device and a wastewater purification system, comprising a tube body and a fiber water filter assembly, wherein the tube body is vertically erected, the fiber water filter assembly is arranged in the tube body, the fiber water filter assembly comprises a lower support seat, an upper support seat and a plurality of filter fibers, the lower support seat is fixedly connected to the tube body, the upper support seat is located on the upper side of the lower support seat, and can move up and down in the tube body, the outer periphery of the upper support seat is slidably sealed with the periphery of the tube body; the lower side of the lower support seat is a lower tube cavity, the lower support seat and the upper support seat are between the middle tube cavity, and the upper side of the upper support seat is an upper tube cavity; the filter fibers are located in the middle tube cavity, the two ends of the filter fibers are respectively connected to the lower support seat and the upper support seat, the upper support seat is hollow inside and connected to the upper end of the filter fibers; the inner wall of the tube body is provided with a connecting groove, and the connecting groove is in an up-down direction. The present invention can continuously and effectively realize wastewater filtration and purification.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and more specifically, to a tubular wastewater purification device and a wastewater purification system. Background Art

[0002] Industrial wastewater contains a large amount of impurities and harmful substances, which need to go through multiple treatment processes such as filtration separation, harmful substance treatment, and degradation, so that the wastewater can meet the discharge standards or form recyclable recycled water. In the process of treating some wastewater, membrane filtration is used to purify the wastewater. Generally, at the end of the treatment step, the relatively clean wastewater is supplemented with treatment. The membrane filtration treatment can separate the suspended matter and impurities with smaller particle size in the water, and can obtain clean water that meets higher index requirements.

[0003] MBR fiber filter membrane is a commonly used membrane filtration device. Each group of fiber filter membranes contains multiple filter fibers. The filter fibers are hollow inside and have tiny holes on the surface. During filtration, the filter fibers are immersed in water, and clean water can pass through the micropores on the surface of the filter fibers and enter the filter fibers to obtain filtered clean water. Moreover, the filter fibers have a larger specific surface area than traditional plate-type filter equipment, which can improve the efficiency of filtration.

[0004] During use, impurities are easily accumulated on the surface of the filter fiber. Once attached, the impurities are easy to clog the micropores on the surface of the filter fiber, thereby reducing the water filtration efficiency of the filter fiber and causing the equipment to fail to work properly.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0006] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a tubular wastewater purification device and a wastewater purification system, which can filter and purify wastewater and delay the clogging of filter fibers.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A tubular wastewater purification device comprises a tube body and a fiber water filter assembly, wherein the tube body is vertically erected, the fiber water filter assembly is arranged in the tube body, the fiber water filter assembly comprises a lower support seat, an upper support seat and a plurality of filter fibers, the lower support seat is fixedly connected to the tube body, the upper support seat is located on the upper side of the lower support seat and can move up and down in the tube body, the outer periphery of the upper support seat is slidably sealed with the periphery of the tube body; the lower side of the lower support seat is a lower tube cavity, the middle tube cavity is between the lower support seat and the upper support seat, and the upper side of the upper support seat is an upper tube cavity;

[0009] The filter fiber is located in the middle tube cavity, and the two ends of the filter fiber are respectively connected to the lower support seat and the upper support seat, the upper support seat is hollow inside and connected to the upper end of the filter fiber; the inner wall of the tube body is provided with a connecting groove, and the connecting groove is in an up-down direction, and the upper support seat is in the lowest position when it is active, the upper support seat is lower than the connecting groove, and the upper tube cavity and the middle tube cavity are closed to each other; when the upper support seat is in the uppermost position of the active stroke, the outer periphery of the upper support seat is opposite to the connecting groove, and the upper tube cavity and the middle tube cavity are connected through the connecting groove;

[0010] There are a plurality of connecting grooves, each of which is distributed on the inner wall of the tube body in a ring array; along the up and down direction, the length of the connecting groove is greater than the length of the upper support seat.

[0011] The present invention is further configured to include a water inlet pipe, a water outlet pipe, an air inlet pipe and an air outlet pipe, wherein the water inlet pipe and the air inlet pipe are connected to the lower tube cavity of the tube body, the water outlet pipe is connected to the inner cavity of the upper support seat, and the air outlet pipe is connected to the upper tube cavity; the lower support seat is provided with a channel, and the channel connects the lower tube cavity and the middle tube cavity.

[0012] The present invention is further configured such that the lower support seat is hollow inside and communicates with the lower end of the filter fiber, and a flexible connecting pipe is connected between the lower support seat and the upper support seat, and the connecting pipe communicates the inner cavity of the lower support seat and the upper support seat.

[0013] The present invention is further configured such that the connecting tube is longer than the filter fiber, the upper support seat is at the uppermost position of the movable stroke, and the filter fiber can be stretched and straightened; the upper support seat is at the lowermost position of the movable stroke, and the filter fiber is bent and gathered in the middle tube cavity.

[0014] The present invention is further configured such that an upper end cover is disposed at the upper end of the tube body, a lower end cover is disposed at the lower end of the tube body, the water inlet pipe is connected to the lower end cover, and the water outlet pipe passes through the upper end cover.

[0015] The present invention is further configured as follows: the water inlet pipe is used to transport the water to be treated into the lower tube cavity, and the water outlet pipe is used to output the clean water filtered by the fiber water filter component; the air inlet pipe is used to transport gas into the lower tube cavity and can aerate the middle tube cavity; the air outlet pipe is used to discharge the gas in the tube body and can balance the internal pressure of the tube body.

[0016] The present invention is further configured to further include a linkage rod, which is connected to the driver and can move up and down along the tube body; the linkage rod extends from the upper end of the tube body and is connected to the upper support seat.

[0017] The present invention also provides a wastewater purification system, including the above-mentioned tubular wastewater purification device. During the treatment process, the wastewater enters the lower tube cavity from the tube body, and then enters the middle tube cavity through the lower support seat; the wastewater in the middle tube cavity is filtered and separated by the fiber water filter component, and sucked from the outlet pipe by a pump device, and the clean water filtered by the fiber water filter component can be discharged from the outlet pipe; the impurities obtained by filtering and separation are blocked in the middle tube cavity and the lower tube cavity; aeration is carried out from the lower end of the tube body, and gas is introduced into the middle tube cavity, generating vibration and upward water flow outside the filter fiber, and during the aeration process, the internal pressure of the middle tube cavity increases, pushing the upper support seat to rise, and the filter fiber will stretch and straighten; until the upper support seat moves to the uppermost end of the stroke, the connecting groove connects the upper tube cavity and the middle tube cavity, the pressure inside the middle tube cavity is discharged, and the upper support seat will reciprocate up and down under the action of air pressure.

[0018] In summary, the present invention has the following beneficial effects:

[0019] By arranging a fiber water filter assembly in the tube body, the upper support seat of the fiber water filter assembly can be adjusted up and down in the tube body. When the upper support seat is adjusted downward, the filter fiber will be bent, so that the space occupied by the filter fiber becomes smaller, and the sealing of the filter fiber in the space will become larger, forming a sieve-like structure; the lower part of the inner cavity of the middle tube will block most of the impurities; and the water in the upper part is relatively clean, and the blocking effect on the filter fiber will be greatly reduced. After long-term use, the surface of the upper half of the filter fiber always has a good filtering and water permeability effect. When blockage occurs in the lower half of the filter fiber, the filter fiber can still work normally and stably.

[0020] By arranging an aeration pipeline structure at the lower end of the pipe body, aeration can be performed inside the pipe body. The bubbles formed during the aeration process can impact the surface of the filter fiber, exert a vibration on the filter fiber, and then impurities attached to the surface of the filter fiber can be removed. It is also beneficial for the surface of the filter fiber to be in a relatively clean state and impurities will not accumulate on the surface.

[0021] During the aeration process, the pressure of aeration can push the upper support seat to move upward, so that the filter fiber between the upper support seat and the lower support seat can be stretched, so that the filter fiber can produce a telescopic change; the filter fiber changes from a bent state to a tensioned state, and will also produce vibration and shaking effects during the change process, and can also remove impurities attached to the surface of the filter fiber, which is conducive to the surface of the filter fiber being in a relatively clean state. In addition, a connecting groove is opened inside the tube body. When the upper support seat moves to a high position, the connecting groove can connect the tube cavity and the middle tube cavity, and can discharge the pressure in the middle tube cavity, so that the upper support seat can produce an up and down oscillation near the high position, which can increase the shaking of the filter fiber and delay the blockage of the filter fiber surface. In addition, when the filter fiber is tightened, the speed of the filter fiber suddenly decreases, resulting in a sudden change in speed, and the mechanical energy is converted into the internal energy of the filter fiber. The filter fiber will produce extrusion deformation inside. In this process, the micropores on the surface of the filter fiber will also undergo certain changes, so that the impurities in the blocked micropores on the surface of the filter fiber can fall off and achieve effective cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of a tubular wastewater purification device in Example 1;

[0023] Figure 2 It is a three-dimensional cross-sectional view of a tubular wastewater purification device in Example 1;

[0024] Figure 3 A cross-sectional view of a tubular wastewater purification device in Example 1 Figure 1 ;

[0025] Figure 4 A cross-sectional view of a tubular wastewater purification device in Example 1 Figure 2 ;

[0026] Figure 5 It is a cross-sectional view of a tubular wastewater purification device in Example 2.

[0027] Figure numerals: tube body 10; upper end 11; upper end cover 111; water outlet pipe 112; air outlet pipe 113; lower end 12; lower end cover 121; water inlet pipe 122; air inlet pipe 123; fiber water filter assembly 20; lower support seat 21; channel 211; upper support seat 22; sealing guide sleeve 221; filter fiber 23; connecting pipe 24; lower tube cavity 3; upper tube cavity 4; middle tube cavity 5; conduit 6; connecting groove 7; linkage rod 8. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] This embodiment discloses a tubular wastewater purification device, referring to Figure 1-Figure 4 As shown, it includes a tube body 10 and a fiber water filter assembly 20. The tube body 10 is an upright structure, and a hollow tube cavity is formed inside the tube body 10. The fiber water filter assembly 20 is installed in the tube body 10. The fiber water filter assembly 20 can filter and separate wastewater to remove impurities in the wastewater and obtain relatively clean water.

[0031] The fiber water filtration assembly 20 includes a lower support seat 21, an upper support seat 22 and a plurality of filter fibers 23. The filter fibers 23 are MBR fiber filter membranes that can filter and purify water well. The filter fibers 23 are connected between the lower support seat 21 and the upper support seat 22 to support the filter fibers 23 and guide the clean water.

[0032] Specifically, the lower support seat 21 is fixedly connected to the tube body 10, and the upper support seat 22 is located on the upper side of the lower support seat 21. The lower support seat 21 and the upper support seat 22 can separate the inner cavity of the tube body 10 into three chambers, namely, the upper tube cavity 4, the middle tube cavity 5 and the lower tube cavity 3 from top to bottom. The lower side of the lower support seat 21 is the lower tube cavity 3, the middle tube cavity 5 is between the lower support seat 21 and the upper support seat 22, and the upper side of the upper support seat 22 is the upper tube cavity 4.

[0033] The filter fiber 23 is located in the middle tube cavity 5, and the two ends of the filter fiber 23 are respectively connected to the lower support seat 21 and the upper support seat 22. The lower support seat 21 and the upper support seat 22 are both hollow structures, and the two ends of the filter fiber 23 are respectively connected to the lower support seat 21 and the upper support seat 22. By sucking the upper support seat 22 through an external self-priming pump, negative pressure can be generated inside the filter fiber 23, and the water in the tube body 10 can pass through the outer wall of the filter fiber 23 and enter the filter fiber 23 to achieve filtration and separation, thereby obtaining relatively clean water.

[0034] The upper support seat 22 is shaped to match the inner contour of the tube body 10 and can move up and down in the tube body 10. In addition, a sealing guide sleeve 221 is installed on the outer periphery of the upper support seat 22, and the sealing guide sleeve 221 slides and seals with the inner periphery of the tube body 10 to form a piston-like structure.

[0035] The upper support seat 22 has a certain weight. Under the action of its own weight, the upper support seat 22 will move downward in the tube body 10. The filter fiber 23 is a flexible material and can hardly resist the downward force. The filter fiber 23 will be bent, so that the space occupied by the filter fiber 23 becomes smaller, and the seal of the filter fiber 23 in the space will become larger, forming a structure similar to a screen. The upper support seat 22 is in the lowest position when it moves. The filter fiber 23 bends and gathers in the middle tube cavity 5, and the distribution of the filter fiber 23 will become more compact. Moreover, during the bending change process, mutual friction will also occur between the filter fibers 23, and the friction can also play a role in cleaning the surface of the filter fiber 23.

[0036] After being bent and gathered, the filter fibers 23 can form a sieve-like structure, and the suspended solids and impurities in the wastewater can be filtered and separated through the filter fibers 23 and the mesh distribution structure of the filter fibers 23, so that most of the impurities will be stored on the lower side of the filter fibers 23 and it is difficult to move upward, thereby making the water in the upper half of the middle tube cavity 5 always in a relatively clean state. The lower part of the inner cavity of the middle tube cavity 5 will block most of the impurities; while the water in the upper part is relatively clean, the blocking effect on the filter fibers 23 will be greatly reduced. After long-term use, the surface of the upper half of the filter fibers 23 always has a good filtering and water permeability effect. When the lower half of the filter fibers 23 is blocked, the filter fibers 23 can still work normally and stably.

[0037] Reference Figure 1-Figure 3 As shown, the tubular wastewater purification device in this embodiment also includes a water inlet pipe 122, a water outlet pipe 112, an air inlet pipe 123 and an air outlet pipe 113, wherein the water inlet pipe 122 is used for inputting wastewater to be treated, and the water outlet pipe 112 is used for discharging clean water after treatment. The air inlet pipe 123 is used for introducing aerated gas into the lower end 12 of the pipe body 10, and the air outlet pipe 113 is used for discharging aerated gas at the upper end 11 of the pipe body 10 to balance the pressure inside the pipe body 10.

[0038] During the treatment process, the wastewater enters the lower tube cavity 3 from the tube body 10, and then enters the middle tube cavity 5 through the lower support seat 21; the wastewater in the middle tube cavity 5 is filtered and separated by the fiber water filter component 20, and is sucked from the outlet pipe 112 by a pump device, and the clean water obtained by filtering the fiber water filter component 20 can be discharged from the outlet pipe 112; the impurities obtained by filtration and separation are blocked in the middle tube cavity 5 and the lower tube cavity 3.

[0039] An upper end cap 111 is provided at the upper end 11 of the tube body 10, and a lower end cap 121 is provided at the lower end 12 of the tube body 10. A water inlet pipe 122 is connected to the lower end cap 121 and communicates with the lower tube cavity 3 of the tube body 10. An air inlet pipe 123 is connected to the lower tube cavity 3 of the tube body 10, specifically connected to the outer peripheral wall of the lower tube cavity 3, and can introduce aeration gas into the lower tube cavity 3.

[0040] The water outlet pipe 112 passes through the upper end cover 111 and extends into the upper tube cavity 4. The water outlet pipe 112 is connected to the inner cavity of the upper support seat 22 through the conduit 6, so that the water outlet pipe 112 can be connected to the inner cavity of the upper support seat 22. In addition, the conduit 6 is made of a flexible and bendable material and will not affect the lifting and lowering of the upper support seat 22.

[0041] The lower support seat 21 is provided with a channel 211, which runs up and down and can connect the lower tube cavity 3 and the middle tube cavity 5. Moreover, the channel 211 and the inner cavity of the lower support seat 21 are sealed with each other, and the channel 211 only serves to connect the lower tube cavity 3 and the middle tube cavity 5. Through the channel 211 of the lower support seat 21, the wastewater in the lower tube cavity 3 can flow upward into the middle tube cavity 5 to realize water flow. At the same time, the channel 211 of the lower support seat 21 can also flow aeration gas.

[0042] The inner cavities of the lower support seat 21 and the upper support seat 22 are connected to the lower end of the filter fiber 23, and a flexible connecting pipe 24 is connected between the lower support seat 21 and the upper support seat 22. The connecting pipe 24 will not affect the normal lifting of the upper support seat 22, and when the upper support seat 22 descends, the connecting pipe 24 can bend flexibly and adaptively.

[0043] The length of the connecting tube 24 is greater than that of the filter fiber 23. When the upper support seat 22 is at the uppermost position of the movable stroke, the filter fiber 23 can be stretched and straightened and is slightly in a taut state; and the connecting tube 24 is fully stretched, and thus the connecting tube 24 will not affect the expansion and contraction and relaxation state of the filter fiber 23.

[0044] A connecting groove 7 is provided on the inner wall of the tube body 10, and the connecting groove 7 extends up and down. The upper support seat 22 is in the lowest position when it is active, and the upper support seat 22 is lower than the connecting groove 7, and the upper tube cavity 4 and the middle tube cavity 5 are closed to each other; when the upper support seat 22 is at the uppermost position of the active stroke, the outer periphery of the upper support seat 22 is opposite to the connecting groove 7, and the upper tube cavity 4 and the middle tube cavity 5 are connected through the connecting groove 7.

[0045] Specifically, a plurality of connecting grooves 7 may be provided, and each connecting groove 7 is distributed in a circular array on the inner wall of the tube body 10. Moreover, the connecting groove 7 is in an up-down direction, and the length of the connecting groove 7 is greater than the length of the upper support seat 22. When the upper support seat 22 moves to the range of the connecting groove 7, the spaces on the upper and lower sides of the upper support seat 22 can be connected through the connecting groove 7, thereby playing a role of connecting and relieving pressure.

[0046] Reference Figure 4As shown, before aeration, the upper support seat 22 is in a lower position, that is, the upper support seat 22 is located at the lower side of the connecting groove 7, and the upper support seat 22 and the inner cavity of the tube body 10 form a piston sealing structure, and the upper tube cavity 4 and the middle tube cavity 5 are sealed and separated from each other. During the aeration process, the aerated gas enters the tube body 10, and the internal pressure of the middle tube cavity 5 increases, pushing the upper support seat 22 to rise. As the filter fiber 23 stretches and straightens, the filter fiber 23 changes from a bent state to an elongated state. The filter fiber 23 is affected by vibration and shaking during the change process, which can remove impurities attached to the surface of the filter fiber 23, and is also conducive to the surface of the filter fiber 23 being in a relatively clean state, and no impurities will accumulate on the surface.

[0047] As the aeration process proceeds, the internal pressure of the middle tube cavity 5 further increases, and the piston of the upper support seat 22 continues to move upward until the upper support seat 22 moves to the uppermost end of the stroke. Figure 3 As shown, at the uppermost position near the stroke, the connecting groove 7 connects the upper tube cavity 4 and the middle tube cavity 5, and the connecting groove 7 can discharge the pressure inside the middle tube cavity 5, and discharge the pressure to the external environment through the air outlet pipe 113. When the upper support seat 22 moves to the uppermost position of the stroke, the filter fiber 23 will also be in a slightly stretched and tightened state, the pressure inside the middle tube cavity 5 will be discharged, and the pressure inside the middle tube cavity 5 will drop, and it will not be able to produce the effect of air pressure support on the upper support seat 22, and then the upper support seat 22 will drop again under the action of its own weight until the upper support seat 22 falls to a position slightly lower than the connecting groove 7, and the upper end of the middle tube cavity 5 will form a piston seal structure again, and the middle tube cavity 5 will accumulate pressure again, and the upper support seat 22 will move upward again under the action of air pressure. The upper support seat 22 will reciprocate up and down under the action of air pressure, forming a vibration-like action near the uppermost position, and then it can apply relatively continuous vibration to the filter fiber 23, and impurities attached to the surface of the filter fiber 23 can fall off.

[0048] This embodiment also discloses a wastewater purification system, including a frame, on which are mounted several groups of tubular wastewater purification devices in the above embodiments. The multiple groups of tubular wastewater purification devices can separate and treat wastewater at the same time, thereby improving the efficiency of wastewater treatment.

[0049] During the wastewater treatment process, aeration is regularly applied to the tube body 10. Under the action of aeration, gas enters from the lower end 12 of the tube body 10, passes through the lower support seat 21 and enters the middle tube cavity 5, generating vibration and upward water flow outside the filter fiber 23, thereby causing impurities attached to the surface of the filter fiber 23 to fall off, and delaying the clogging of the surface of the filter fiber 23.

[0050] In order to discharge the impurities and concentrated water after filtration, a drain pipe (not shown in the figure) can be connected to the lower end cover 121 of the tube body 10, and the impurities and concentrated water accumulated at the bottom of the tube body 10 can be discharged through the drain pipe. Alternatively, the drain pipe may not be connected, and the water inlet pipe 122 can also serve as a drain hole pipe when no water is flowing in, and combined with the suction effect of the pump device, the impurities and concentrated water can be effectively discharged.

[0051] Embodiment 2

[0052] This embodiment discloses a tubular wastewater purification device. Figure 5 In this embodiment, the tubular wastewater purification device further includes a linkage rod 8, which extends from the upper end of the tube body 10 and is connected to the upper support seat 22, and the linkage rod 8 passes through the upper end cover 111 of the tube body 10, and a sealing sleeve can be used to slide and seal at the connection, so that the connection between the linkage rod 8 and the upper end cover 111 can maintain a stable sealing state without air leakage and water leakage.

[0053] The linkage rod 8 is connected to the driver, and under the driving control of the driver, it can move up and down along the tube body 10, and can drive the linkage rod 8 to move, and then produce a lifting linkage action with the upper support seat 22. The linkage rod 8 can play a role in actively adjusting the upper support seat 22. When the tubular wastewater purification device works normally, the linkage rod 8 and the driver are separated from each other, and the upper support seat 22 moves normally under the action of air pressure.

[0054] When active interference is required, the linkage rod 8 can be connected to the driver, and the driver can actively control the linkage rod 8 and the upper support seat 22, which can play a role in resetting and active adjustment. The upper support seat 22 can be actively controlled by the linkage rod 8. When the linkage rod 8 moves upward, it can drive the upper support seat 22 to move upward. After the upward movement, the space between the upper support seat 22 and the lower support seat 21 becomes larger, and the space of the middle tube cavity 5 becomes larger, and the pressure inside the middle tube cavity 5 will become smaller, which is conducive to cleaning the obstruction on the surface of the filter fiber 23. Generally, when the equipment stops filtering water, the filter fiber 23 can be actively cleaned by the up and down movement of the linkage rod 8.

[0055] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A tubular wastewater purification device, characterized in that: The invention comprises a tube body (10) and a fiber water filter assembly (20), wherein the tube body (10) is vertically erected, the fiber water filter assembly (20) is arranged in the tube body (10), the fiber water filter assembly (20) comprises a lower support seat (21), an upper support seat (22) and a plurality of filter fibers (23), the lower support seat (21) is fixedly connected to the tube body (10), the upper support seat (22) is located on the upper side of the lower support seat (21) and can move up and down in the tube body (10), and the outer periphery of the upper support seat (22) is slidably sealed with the inner periphery of the tube body (10); the lower side of the lower support seat (21) is a lower tube cavity (3), the middle tube cavity (5) is between the lower support seat (21) and the upper support seat (22), and the upper side of the upper support seat (22) is an upper tube cavity (4); The filter fiber (23) is located in the middle tube cavity (5), and the two ends of the filter fiber (23) are respectively connected to the lower support seat (21) and the upper support seat, and the upper support seat is hollow inside and communicates with the upper end of the filter fiber (23); the inner wall of the tube body (10) is provided with a connecting groove (7), and the connecting groove (7) is in an up-down direction. When the upper support seat (22) is in the lowest position in the movable stroke, the upper support seat (22) is lower than the connecting groove (7), and the upper tube cavity (4) and the middle tube cavity (5) are closed to each other; when the upper support seat (22) is in the highest position in the movable stroke, the outer periphery of the upper support seat (22) is opposite to the connecting groove (7), and the upper tube cavity (4) and the middle tube cavity (5) are communicated through the connecting groove (7); A plurality of the communication grooves (7) are provided, and the communication grooves (7) are distributed in a ring array on the inner wall of the tube body (10); along the up-down direction, the length of the communication grooves (7) is greater than the length of the upper support seat (22); It also comprises a water inlet pipe (122), a water outlet pipe (112), an air inlet pipe (123) and an air outlet pipe (113); the water inlet pipe (122) and the air inlet pipe (123) are connected to the lower tube cavity (3) of the tube body (10); the water outlet pipe (112) is connected to the inner cavity of the upper support seat (22); and the air outlet pipe (113) is connected to the upper tube cavity (4); the lower support seat (21) is provided with a channel (211), and the channel (211) is connected to the lower tube cavity (3) and the middle tube cavity (5); The water inlet pipe (122) is used to transport the water to be treated into the lower tube cavity (3), and the water outlet pipe (112) is used to output the clean water filtered by the fiber water filter assembly (20); the air inlet pipe (123) is used to transport gas into the lower tube cavity (3) and can aerate the middle tube cavity (5); the air outlet pipe (113) is used to discharge the gas in the tube body (10) and can balance the internal pressure of the tube body (10); The upper support seat (22) has a certain weight. Under the action of its own weight, the upper support seat (22) will move downward in the tube body (10).

2. The tubular wastewater purification device according to claim 1, characterized in that: The lower support seat (21) is hollow inside and communicates with the lower end of the filter fiber (23); a flexible connecting pipe (24) is connected between the lower support seat (21) and the upper support seat (22); the connecting pipe (24) communicates the inner cavities of the lower support seat (21) and the upper support seat (22).

3. The tubular wastewater purification device according to claim 2, characterized in that: The connecting tube (24) is longer than the filter fiber (23), and when the upper support seat (22) is at the uppermost position of the movable stroke, the filter fiber (23) can be stretched and straightened; when the upper support seat (22) is at the lowermost position of the movable stroke, the filter fiber (23) is bent and gathered in the middle tube cavity (5).

4. The tubular wastewater purification device according to claim 1, characterized in that: An upper end cover (111) is provided at the upper end (11) of the tube body (10), a lower end cover (121) is provided at the lower end (12) of the tube body (10), the water inlet pipe (122) is connected to the lower end cover (121), and the water outlet pipe (112) passes through the upper end cover (111).

5. The tubular wastewater purification device according to claim 1, characterized in that: It also includes a linkage rod (8), which is connected to the driver and can move up and down along the tube body (10); the linkage rod (8) extends from the upper end of the tube body (10) and is connected to the upper support seat (22).

6. A wastewater purification system, characterized in that: It comprises a tubular wastewater purification device as described in any one of claims 1 to 5.

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